阅读说明：本技术 一种小型工装的设计展开方法 (Design expansion method of small tool ) 是由 常志军 刘保华 黄健 于 2021-09-14 设计创作，主要内容包括：本发明提供一种小型工装的设计展开方法,包括以下步骤：根据小型工装的设计制作要求,作出所述小型工装的主视图,所述小型工装包括第一管件、贯穿在第一管件在的第二管件、以及贯穿在第一管件和第二管件中的底板；后续在小型工装的主视图中获取第一管件的展开图、第一管件上的开孔线、以及第二管件的展开图。本发明涉及小型工装的设计展开方法,通过CAD软件绘制出专用工装件设计图,并用设计放样展开的方法把专用工装件展开,从而进行实施板材号料,从而在下料、切裁的过程中,直接将贯穿孔切割出来,然后再进行辊压,经过后续作业拼装焊接成专用工装件,从而提高小型工装件的管子贯穿开孔精度、提高了生产效率。(The invention provides a design unfolding method of a small tool, which comprises the following steps: making a front view of a small tool according to the design and manufacturing requirements of the small tool, wherein the small tool comprises a first pipe, a second pipe penetrating through the first pipe and a bottom plate penetrating through the first pipe and the second pipe; and subsequently, acquiring an expanded view of the first pipe, an opening line on the first pipe and an expanded view of the second pipe from the front view of the small-sized tool. The invention relates to a design and expansion method of a small-sized tool, which is characterized in that a special tool design drawing is drawn through CAD software, and the special tool is expanded by a design lofting and expansion method, so that plate material marking is carried out, through holes are directly cut out in the processes of blanking and cutting, then rolling is carried out, and the special tool is assembled and welded through subsequent operation, so that the precision of penetrating and opening holes of pipes of the small-sized tool is improved, and the production efficiency is improved.)

1. A design unfolding method of a small tool is characterized by comprising the following steps: the design deployment method sequentially comprises the following steps:

s1, making a front view of the small tool according to the design and manufacturing requirements of the small tool, wherein the small tool comprises a first pipe (1), a second pipe (2) penetrating through the first pipe (1), and a bottom plate (3) penetrating through the first pipe (1) and the second pipe (2);

s2, in a front view of the small tool, drawing a first circle (103) by the diameter of the first pipe (1), wherein the first circle (103) is tangent to an extension line of the side edge of the first pipe (1); equally dividing the first circle (103) into 12 parts along the circumference, and respectively marking the dividing points as 1 '-12'; making axial extensions of the first tubular element (1) along the division points, each axial extension extending to the top end of the first tubular element (1), said axial extensions being first bisectors (101);

s3, drawing a second circle (203) by the diameter of the second pipe fitting (2), wherein the second circle (203) is tangent to the extension line of the side edge of the second pipe fitting (2); equally dividing the second circle (203) into 12 parts along the circumference, and respectively marking the dividing points as 1 '-12'; making axial extension lines along the second tube member (2) along the respective division points, each axial extension line extending to the top end of the second tube member (2), said axial extension lines being second bisectors (201);

s4, a line passing through the center of the first circle (103) in the first bisectors (101) is a first central line (102), and a line passing through the center of the second circle (203) in the second bisectors (201) is a second central line (202); the plurality of first bisectors (101) all intersect the second centerline (202) to obtain an intersection point A1-A7, wherein the intersection point of the first centerline (102) and the second centerline (202) is A4;

s5, making a vertical line along the extension line of the second central line (202), translating the intersection point A1-A7 to the extension line of the second central line (202), and enabling the intersection point A4 and the intersection point of the second central line (202) to coincide with the vertical line to obtain an intersection point B1-B7;

s6, respectively making a vertical line of a second central line (202) along the intersection point B1-B7, measuring the vertical distance from each division point 1 '-12' in the first circle (103) to the diameter perpendicular to the first central line (102) in the first circle (103), and translating the length of the vertical distance to each vertical line of the intersection point B1-B7 to obtain points C1-C12; connecting C1-C12 points in sequence by adopting a smooth curve to obtain the elliptic section of the first pipe fitting (1); wherein B1 and C1 coincide, B7 and C7 coincide;

s7, extending the second bisector (201) of the second pipe fitting (2) and penetrating the elliptic section of the first pipe fitting (1) to obtain an intersection point D1-D14; at the same time, defining the extension of said second bisector (201) as a first intersection line (204);

s8, the second central line (202) divides the elliptical section of the first pipe fitting (1) into two halves, the elliptical section and the first intersecting line (204) on the right half side of the first central line (102) are selected and translated to the top end of the first pipe fitting (1), and then the first central line (102) of the first pipe fitting (1) penetrates through the center point of the translated elliptical section;

s9, the intersection point of the translated elliptical cross section and the first intersecting line (204) is D1-D8, wherein the intersection points D1 and D8 are on the top end line of the first pipe fitting (1), a projection line perpendicular to the top end line of the first pipe fitting (1) is made along the intersection points D2-D6, the projection line of the D2-D6 and the top end line of the first pipe fitting (1) are provided with projection points, parallel lines of a first bisector (101) are made along the projection points and the intersection points D1 and D8, and the parallel lines are respectively intersected with the second bisector (201); wherein, the intersection points of the parallel line made from the intersection point D1 and the two outermost second bisectors (201) are respectively E1 and E7, the intersection points of the parallel line made from the projection point of the intersection point D2 and the right second bisector (201) and the left second bisector are respectively E2 and E6, the intersection points of the parallel line made from the projection point of the intersection point D3 and the right third bisector (201) and the left third bisector are respectively E3 and E5, and the intersection points of the parallel line made from the projection point of the intersection point D4 and the middle second bisector (201) are respectively E4; similarly, the intersection points of the parallel line made from the intersection point D8 and the two outermost second bisectors (201) are respectively E8 and E14, the intersection points of the parallel line made from the projection point of the intersection point D7 and the right second bisector (201) and the left second bisector are respectively E9 and E13, the intersection points of the parallel line made from the projection point of the intersection point D6 and the right third bisector (201) and the left third bisector are respectively E10 and E12, and the intersection points of the parallel line made from the projection point of the intersection point D5 and the middle second bisector (201) are respectively E11; connecting E1-E7 in sequence by using a smooth curve to obtain a first through-penetration line (104) of the first pipe fitting (1), and connecting E8-E14 in sequence by using a smooth curve to obtain a second through-penetration line (105) of the first pipe fitting (1);

s10, drawing an expansion drawing of the first pipe fitting (1), vertically drawing a first normal line (4) along a first central line (102), selecting a straight line segment with the same length as the circumference of the first pipe fitting (1) on the first normal line (4), and equally dividing the straight line segment into 12 parts; drawing parallel lines of the first central line (102) along the dividing points to obtain a first pipe expansion line (7), and defining the middle first pipe expansion line (7) as a third central line (701); parallel lines of a first normal line (4) are drawn from the bottom intersection point of the bottom edge of the first pipe (1) and the first bisector line (101), the intersection points of the parallel lines drawn from the leftmost bottom intersection point X1 and the third centerline (701) are Y1, the intersection points of the parallel lines drawn from the second bottom intersection point X2 on the left side and the first pipe deployment line (7) on the left and right sides of the third centerline (701) are Y2 and Y3, respectively, the intersection points of the parallel lines drawn from the third bottom intersection point X3 on the left side and the second first pipe deployment line (7) on the left and right sides of the third centerline (701) are Y4 and Y5, respectively, the intersection points of the parallel lines drawn from the fourth bottom intersection point X4 on the left side and the third first pipe deployment line (7) on the left and right sides of the third centerline (701) are Y6 and Y7, respectively, and the intersection points of the parallel lines drawn from the fifth bottom intersection point X5 on the left side and the first pipe deployment line (701) on the left and the third centerline (701) are Y632 and Y9, respectively, the intersection points of parallel lines made from the sixth bottom intersection point X6 on the left side and the fifth first pipe unfolding lines (7) on the left and right sides of the third center line (701) are Y10 and Y11 respectively, and the intersection points of parallel lines made from the seventh bottom intersection point X7 on the left side and the sixth first pipe unfolding lines (7) on the left and right sides of the third center line (701) are Y12 and Y13 respectively; sequentially connecting the intersection points Y1-Y13 by adopting smooth curves to obtain the bottom edge of the expanded view of the first pipe fitting (1); similarly, in the same way, parallel lines of the first normal line (4) are made from the top edge of the first pipe fitting (1) and the top intersection point U1-U7 of the first bisector (101) to obtain intersection points T1-T13, and the intersection points T1-T13 are sequentially connected by adopting smooth curves to obtain the top edge of the expanded view of the first pipe fitting (1);

s11, in the development drawing of the first pipe (1), parallel lines of the first normal line (4) are drawn along the intersection points E1-E7 on the first through-penetration line (104), the parallel lines and the first pipe development line (7) at the leftmost side form intersection points F1-F7, and the parallel lines and the first pipe development line (7) at the rightmost side form intersection points F1 '-F7'; measuring the vertical distance from each division point of 1 '-7' in the second circle (203) to the diameter perpendicular to the second center line (202) in the second circle (203), translating the length of the vertical distance along the parallel line of the first normal line (4) to the right side of the intersection point F1-F7 in a one-to-one correspondence manner to obtain a right translation point of the intersection point F1-F7, translating the length of the vertical distance along the parallel line of the first normal line (4) to the left side of the intersection point F1 '-F7' in a one-to-one correspondence manner to obtain a left translation point of the intersection point F1 '-F7', sequentially connecting the right translation points of the F1-F7 to the right using a smooth curve, and sequentially connecting the left translation points of the F1 '-F7' to the left using a smooth curve to respectively obtain two half arcs, which are the two first tapping sample lines (6);

s12, in the development drawing of the first pipe fitting (1), parallel lines of the first normal line (4) are drawn along the intersection points E8-E14 on the second through hole line (105), and the parallel lines respectively form intersection points F8-F14 with the third central line (701); measuring the vertical distance from each 1 '-12' division point in the second circle (203) to the diameter perpendicular to the second center line (202) in the second circle (203), translating the length of the vertical distance to the left side and the right side of F8-F14 in a one-to-one correspondence manner along the parallel line of the first normal line (4), wherein the 7 'division point is superposed after translating the intersection point F8, the 1' division point is superposed after translating the intersection point F14, the translation points on the left side and the right side of the rest F9-F13 are superposed after translating the vertical distance from each division point to the diameter of the second circle (203) in a one-to-one correspondence manner, and the translation points are connected in sequence by using a smooth curve to obtain a second hole-opening solid sample line (601);

s13, making an expansion drawing of the second pipe fitting (2): vertically drawing a second normal line (8) along the second central line (202), selecting a straight line segment with the same length as the circumference of the second pipe (2) on the second normal line (8), equally dividing the straight line segment into 12 parts, drawing a parallel line of the second central line (202) along each dividing point to obtain a second pipe expansion line (10), and defining the middle second pipe expansion line (10) as a fourth central line (1001); parallel lines of a second normal line (8) are drawn from the bottom intersection point of the bottom edge of the second pipe (2) and the second bisector (201), the intersection points of the parallel lines drawn from the rightmost bottom intersection point X1 'and the fourth centerline (1001) are Y1', the intersection points of the parallel lines drawn from the rightmost bottom intersection point X2 'and the first second pipe deployment line (10) on the left and right sides of the fourth centerline (1001) are Y2' and Y3 ', respectively, the intersection points of the parallel lines drawn from the rightmost third bottom intersection point X3' and the second pipe deployment line (10) on the left and right sides of the fourth centerline (1001) are Y4 'and Y5', the intersection points of the parallel lines drawn from the rightmost fourth bottom intersection point X4 'and the third pipe deployment line (10) on the left and right sides of the fourth centerline (1001) are Y6' and Y7 ', respectively, and the intersection points of the parallel lines drawn from the rightmost fifth bottom intersection point X5' and the fourth centerline (1001) on the right side and the fourth bottom intersection point X5 'and the fourth centerline (10) are Y6' and the fourth centerline (10) on the left and right side of the fourth centerline (1001) The intersection points are Y8 'and Y9', the intersection points of parallel lines from the sixth bottom intersection point X6 'on the right side and fifth second pipe deployment lines (10) on the left and right sides of the fourth center line (1001) are Y10' and Y11 ', and the intersection points of parallel lines from the seventh bottom intersection point X7' on the right side and sixth second pipe deployment lines (10) on the left and right sides of the fourth center line (1001) are Y12 'and Y13', respectively; connecting the intersection points Y1 '-Y13' in sequence by adopting smooth curves to obtain the bottom edge of the development of the second pipe fitting (2); similarly, in the same way, parallel lines of the second normal line (8) are made from the top edge of the second pipe (2) and the top intersection point U1 '-U7' of the second bisector (201) to obtain intersection points T1 '-T13', and the intersection points T1 '-T13' are connected in sequence by adopting smooth curves to obtain the top edge of the developed picture of the second pipe (2).

2. The design unfolding method of the small tool according to claim 1, characterized in that: the steps further include:

a1, making a side view and a top view of the small tool according to the design and manufacture requirements of the small tool, projecting downwards to the top view of the small tool along the intersection point of the first bisector (101) of the first pipe (1) and the bottom surface of the bottom plate (3) according to the front view in the step S3, taking the intersection point of the projection line and the transverse center line of the bottom plate (3) as a projection point, measuring the vertical distance from each division point 1 '-12' in the first circle (103) to the diameter perpendicular to the first center line (102) in the first circle (103), translating the length of the vertical distance to the upper side and the lower side of the projection point, and obtaining division points G1-G12 in the vertical direction, wherein the division point 7 'is translated to coincide with G7, the division point 1' is translated to coincide with G1, and the division points 2 '-6', 8 '-12' are translated to coincide with G2-G6, G8-G12 correspond one to one; connecting G1-G12 in sequence by adopting a smooth curve to obtain a perforated cross-sectional view of the first pipe fitting (1) on the bottom plate (3);

a2, according to the front view in the step A1, projecting downwards to the top view of the small tool along the intersection point of the second bisector (201) of the second pipe (2) and the bottom surface of the bottom plate (3), wherein the intersection point of the projection line and the transverse center line of the bottom plate (3) is a projection point, measuring the vertical distance from each division point 1 '-12' in the second circle (203) to the diameter perpendicular to the second center line (201) in the second circle (203), translating the length of the vertical distance to the upper side and the lower side of the projection point, and obtaining division points H1-H12 in the vertical direction, wherein 7 'division points are translated and then overlapped with H1, 1' division points are translated and then overlapped with H7, and other division points 2 '-6', 8 '-12' are translated and then respectively and correspondingly correspond to H8-H12 and H2-H6 one by one; connecting H1-H12 in sequence by adopting a smooth curve to obtain a perforated cross-sectional view of the second pipe fitting (2) on the bottom plate (3);

a3, in the expanded view of the first pipe (1) of step S10, parallel lines of the first normal line (4) are drawn along the intersection point of the first bisector line (101) and the top surface of the bottom plate (3), the intersection point of the parallel line drawn from the intersection point M1 of the leftmost first bisector line (101) and the top surface of the bottom plate (3) and the third center line (701) is N1, the intersection points of the parallel line drawn from the intersection point M2 of the left second first bisector line (101) and the top surface of the bottom plate (3) and the first pipe expansion line (7) on the left and right sides of the third center line (701) are N2 and N3, respectively, the intersection points of the parallel line drawn from the intersection point M3 of the left third first bisector line (101) and the top surface of the bottom plate (3) and the third first pipe expansion line (7) on the left and right sides of the third center line (701) are N4 and N5, respectively, and the intersection points of the intersection point M4 of the left and right sides of the fourth first bisector line (701) and the third center line (701) are drawn from the intersection point M4 of the left first bisector line (101) and the top surface of the bottom plate (3) The intersection points of the pipe deployment lines (7) are respectively N6 and N7, the intersection points of a parallel line made from the intersection point M5 of the fifth first bisector (101) on the left side and the top surface of the bottom plate (3) and the fourth first pipe deployment lines (7) on the left and right sides of the third center line (701) are respectively N8 and N9, the intersection points of a parallel line made from the intersection point M6 of the sixth first bisector (101) on the left side and the top surface of the bottom plate (3) and the fifth first pipe deployment lines (7) on the left and right sides of the third center line (701) are respectively N10 and N11, and the intersection points of a parallel line made from the intersection point M7 of the seventh first bisector (101) on the left side and the top surface of the bottom plate (3) and the sixth pipe deployment lines (7) on the left and right sides of the third center line (701) are respectively N12 and N13; sequentially connecting the intersection points N1-N13 by adopting smooth curves to obtain the top edge of the first pipe fitting bottom plate mounting line (5);

a4, according to the front view in the step A3, in the same way as in the step A3, respectively drawing parallel lines of the first normal line (4) along the intersection points M1 '-M7' of the first bisector (101) and the bottom surface of the bottom plate (3), so as to obtain the intersection points of the parallel lines of the first normal line (4) and the corresponding first pipe unfolding lines (7), wherein the intersection points are N1 '-N13', and the intersection points N1 '-N13' are sequentially connected by adopting smooth curves, so as to obtain the bottom edge of the first pipe bottom plate mounting line (5);

a5, in the expanded view of the second pipe (2) of step S13, a parallel line of the second normal line (8) is drawn along the intersection point of the second bisector (201) and the top surface of the bottom plate (3), an intersection point of a parallel line drawn from the intersection point P1 of the rightmost second bisector (201) and the top surface of the bottom plate (3) and the fourth center line (1001) is Q1, intersection points of a parallel line drawn from the intersection point P2 of the second right bisector (201) and the top surface of the bottom plate (3) and the first second pipe expanded line (10) on the left and right sides of the fourth center line (1001) are Q2 and Q3, respectively, intersection points of a parallel line drawn from the intersection point P3 of the third right bisector (201) and the top surface of the bottom plate (3) and the second pipe expanded line (10) on the left and right sides of the fourth center line (1001) are Q352 and Q5, respectively, and intersection points P4 of the fourth bisector (201) and the top surface of the fourth center line (4) are drawn from the right side of the fourth bisector (201) and the fourth center line (3) The intersection points of the two pipe deployment lines (10) are respectively Q6 and Q7, the intersection points of a parallel line made from the intersection point P5 of the fifth right second bisector (201) and the top surface of the bottom plate (3) and the fourth second pipe deployment lines (10) on the left and right sides of the fourth center line (1001) are respectively Q8 and Q9, the intersection points of a parallel line made from the intersection point P6 of the sixth right second bisector (201) and the top surface of the bottom plate (3) and the fifth pipe deployment lines (10) on the left and right sides of the fourth center line (1001) are respectively Q10 and Q11, and the intersection points of a parallel line made from the intersection point P7 of the seventh right second bisector (201) and the top surface of the bottom plate (3) and the sixth pipe deployment lines (10) on the left and right sides of the fourth center line (1001) are respectively Q12 and Q13; sequentially connecting the intersection points Q1-Q13 by adopting smooth curves to obtain the top edge of a second pipe fitting bottom plate mounting line (9);

a6, according to the front view in the step A5, in the same way as in the step A5, making parallel lines of the second normal line (8) along the intersection point P1 '-P7' of the second bisector (201) and the bottom surface of the bottom plate (3), obtaining the intersection points of the parallel lines of the second normal line (8) and the corresponding second pipe unfolding lines (10), wherein the intersection points are Q1 '-Q13', and the intersection points Q1 '-Q13' are connected in sequence by adopting smooth curves, thus obtaining the bottom edge of the second pipe bottom plate installation line (9).

3. The design unfolding method of the small tool according to claim 2, characterized in that: the projection accuracy of the projection lines in S9, A1 and A2 is +/-0.1 mm.

4. The design unfolding method of the small tool according to claim 2, characterized in that: the accuracy before and after translation in S5, S6, S8, S11, S12, a1, a2 is ± 0.3 mm.

5. The design unfolding method of the small tool according to claim 2, characterized in that: the accuracy of the bisection among S2, S3, S10, S13 is. + -. 0.1 mm.

6. The design unfolding method of the small tool according to claim 2, characterized in that: the accuracy of the circumferential length in S10 and S13 is. + -. 0.3 mm.

Technical Field

The invention relates to the technical field of small tool design for ship building, in particular to a design expansion method for a small tool.

Background

In the ship building process, production operators need to fix products by means of the aid of production tools and a backer operation method in the process of assembling and positioning the products, but conventional tools cannot meet the size of the assembled parts of the products, and small tooling parts are needed to be used in an assembly area to achieve the fixing effect. However, the small tooling part is a non-standard part which is independently researched and developed, the size of the component needs to be subjected to blanking, cutting, hole rotating and assembling again, the pipe is formed by rolling one flat plate, and the small tooling part needs to penetrate one pipe into the other pipe, so that the flat plate of the large-size pipe needs to be processed with a hole for the small-size pipe to penetrate through before rolling. At present, the problems of low precision, complex operation steps, low production efficiency and the like exist in the hole opening of a flat plate of a large-size pipe at the penetrating position.

Disclosure of Invention

In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide a method for designing and expanding a small tool, which draws a special tool design drawing through CAD software, expands the special tool by a method of designing, lofting and expanding, and performs plate material marking, and welds the special tool in a post-process operation to form a special tool, thereby solving the problems of low precision, complex operation steps, low production efficiency and the like existing in the hole drilling at the penetrating part of the small tool.

In order to achieve the above and other related objects, the present invention provides a method for unfolding a design of a small tool, comprising the steps of:

s1, making a front view of the small tool according to the design and manufacturing requirements of the small tool, wherein the small tool comprises a first pipe, a second pipe penetrating through the first pipe and a bottom plate penetrating through the first pipe and the second pipe;

s2, in a front view of the small tool, drawing a first circle by the diameter of the first pipe, wherein the first circle is tangent to an extension line of the side edge of the first pipe; equally dividing the first circle into 12 parts along the circumference, and respectively marking the dividing points as 1 '-12'; making axial extension lines of the first pipe fitting along the dividing points, wherein each axial extension line extends to the top end of the first pipe fitting and is a first equal-dividing line;

s3, drawing a second circle with the diameter of the second pipe member in the front view of the step S2, the second circle being tangent to the extension line of the side of the second pipe member; equally dividing the second circle into 12 parts along the circumference, and respectively marking the dividing points as 1 '-12'; making axial extension lines along the second pipe fitting along each division point, wherein each axial extension line extends to the top end of the second pipe fitting and is a second bisector;

s4, in the front view of the step S3, the line of the first bisectors passing through the center of the first circle is the first central line, and the line of the second bisectors passing through the center of the second circle is the second central line; the intersection points A1-A7 are obtained by the intersection points of a plurality of first bisectors and a second centerline, wherein the intersection point of the first centerline and the second centerline is A4;

s5, in the front view of the step S4, making a vertical line along the extension line of the second center line, translating the intersection point A1-A7 to the extension line of the second center line, and making the intersection point A4 and the intersection point of the second center line and the vertical line coincide to obtain an intersection point B1-B7;

s6, in the front view of step S5, respectively making a vertical line of a second center line along the intersection point B1-B7, measuring the vertical distance from each division point 1 ' -12 ' in the first circle to the diameter perpendicular to the first center line in the first circle, translating the length of the vertical distance to each vertical line of the intersection point B1-B7 to obtain points C1-C12, namely the point C1 is on the extension line of the second center line, and the vertical distance between the point C2 and the extension line of the second center line is the vertical distance between the division point 2 ' and the diameter of the first circle, and so on; sequentially connecting C1-C12 points by adopting a smooth curve to obtain an elliptical section of the first pipe fitting; wherein B1 and C1 coincide, B7 and C7 coincide;

s7, in the front view of the step S6, extending the second bisector of the second pipe fitting and penetrating the elliptic section of the first pipe fitting to obtain intersection points D1-D14; meanwhile, defining an extension line of the second bisector as a first intersecting line;

s8, in the front view of the step S7, the second central line divides the elliptic section of the first pipe fitting into two halves, the elliptic section and the first intersecting line on the right half side of the first central line are selected and translated to the top end of the first pipe fitting, and then the first central line of the first pipe fitting passes through the central point of the translated elliptic section;

s9, in the front view of the step S8, the intersection point of the translated elliptical cross section and the first intersecting line is D1-D8, wherein the intersection points D1 and D8 are on the top end line of the first pipe, a projection line perpendicular to the top end line of the first pipe is made along the intersection points D2-D6, the projection line of D2-D6 and the top end line of the first pipe have projection points, parallel lines of the first bisector are made along the projection points and the intersection points D1 and D8, and the parallel lines respectively intersect with the second bisector; wherein, the intersection points of the parallel line made from the intersection point D1 and the two outermost second bisectors are respectively E1 and E7, the intersection points of the parallel line made from the projection point of the intersection point D2 and the second bisector of the right side and the left side are respectively E2 and E6, the intersection points of the parallel line made from the projection point of the intersection point D3 and the third bisector of the right side and the left side are respectively E3 and E5, and the intersection point of the parallel line made from the projection point of the intersection point D4 and the middle second bisector is E4; similarly, the intersection points of the parallel line made from the intersection point D8 and the two outermost second bisectors are E8 and E14, respectively, the intersection points of the parallel line made from the projection point of the intersection point D7 and the right second bisector and the left second bisector are E9 and E13, respectively, the intersection points of the parallel line made from the projection point of the intersection point D6 and the right third bisector and the left third bisector are E10 and E12, respectively, and the intersection point of the parallel line made from the projection point of the intersection point D5 and the middle second bisector is E11; connecting E1-E7 in sequence by using a smooth curve to obtain a first through-penetrating hole line of the first pipe fitting, and connecting E8-E14 in sequence by using a smooth curve to obtain a second through-penetrating hole line of the first pipe fitting;

s10, in the front view of the step S9, making an expansion view of the first pipe fitting, vertically making a first normal line along the first center line, selecting a straight line segment with the same length as the circumference of the first pipe fitting on the first normal line, and equally dividing the straight line segment into 12 parts; making parallel lines of the first central line along each division point to obtain a first pipe expansion line, and defining the middle first pipe expansion line as a third central line; parallel lines of a first normal line are drawn from the bottom intersection point of the bottom edge of the first pipe and the first bisector, intersection points of parallel lines drawn from the leftmost bottom intersection point X1 and the third centerline are Y1, intersection points of parallel lines drawn from the left second bottom intersection point X2 and the first pipe deployment lines on the left and right sides of the third centerline are Y2 and Y3, respectively, intersection points of parallel lines drawn from the left third bottom intersection point X3 and the second pipe deployment lines on the left and right sides of the third centerline are Y4 and Y5, intersection points of parallel lines drawn from the left fourth bottom intersection point X4 and the third first pipe deployment lines on the left and right sides of the third centerline are Y6 and Y7, intersection points of parallel lines drawn from the left fifth bottom X5 and the fourth pipe deployment lines on the left and right sides of the third centerline are Y8 and Y9, respectively, intersection points of parallel lines drawn from the left sixth bottom intersection point X6 and the left fifth pipe deployment lines on the left side of the third centerline are Y8 and the fifth pipe deployment lines on the fifth deployment lines on the left side of the third centerline are Y8 and the fifth centerline The intersection points are Y10 and Y11 respectively, and the intersection points of a parallel line drawn from a seventh bottom intersection point X7 on the left side and sixth first pipe deployment lines on the left side and the right side of the third center line are Y12 and Y13 respectively; sequentially connecting the intersection points Y1-Y13 by adopting smooth curves to obtain the bottom edge of the first pipe fitting development diagram; similarly, in the same way, parallel lines of the first normal line are made from the top intersection points U1-U7 of the top edge of the first pipe fitting and the first bisector to obtain intersection points T1-T13, and the intersection points T1-T13 are connected in sequence by adopting smooth curves to obtain the top edge of the expanded view of the first pipe fitting;

s11, in the step S10 of the expanded view of the first pipe, a parallel line of a first normal line is drawn along an intersection point E1-E7 on the first through-penetrating hole line, the parallel line forms an intersection point F1-F7 with the expanded line of the first pipe on the leftmost side, and the parallel line forms an intersection point F1 '-F7' with the expanded line of the first pipe on the rightmost side; measuring the vertical distance from each division point of 1 '-7' in the second circle to the diameter perpendicular to the second center line in the second circle, translating the length of the vertical distance to the right side of the intersection point F1-F7 in a one-to-one correspondence manner along the parallel line of the first normal line to obtain a right translation point of the intersection point F1-F7, translating the length of the vertical distance to the left side of the intersection point F1 '-F7' in a one-to-one correspondence manner along the parallel line of the first normal line to obtain a left translation point of the intersection point F1 '-F7', sequentially connecting the right translation points of the F1-F7 which are translated to the right by using a smooth curve, and sequentially connecting the left translation points of the F1 '-F7' which are translated to the left by using a smooth curve to respectively obtain two half arcs, wherein the two half arcs are the two first open pore solid sample lines;

s12, in the expanded view of the first pipe fitting of the step S11, parallel lines of the first normal line are drawn along the intersection points E8-E14 on the second through-hole line, and the parallel lines respectively form intersection points F8-F14 with the third central line; measuring the vertical distance from each division point of 1 '-12' in the second circle to the diameter perpendicular to the second center line in the second circle, translating the length of the vertical distance to the left side and the right side of F8-F14 in a one-to-one correspondence along the parallel line of the first normal line, wherein the division point of 7 'is overlapped with the intersection point F8 after translating, the division point of 1' is overlapped with the intersection point F14 after translating, the translation point distances of the left side and the right side of the rest points of F9-F13 are corresponding to the vertical distance from each division point of 2 '-6' and 8 '-12' to the diameter of the second circle, and connecting the translation points in sequence by using a smooth curve to obtain a second tapping real sample line;

s13, in the front view of the step S9, a second pipe expansion diagram is made: vertically making a second normal line along the second central line, selecting a straight line segment with the same length as the circumference of the second pipe fitting on the second normal line, equally dividing the straight line segment into 12 parts, making a parallel line of the second central line along each division point to obtain a second pipe fitting expansion line, and defining the middle second pipe fitting expansion line as a fourth central line; parallel lines of a second normal line are drawn from the bottom intersection point of the bottom edge of the second pipe and the second bisector, the intersection points of parallel lines drawn from the rightmost bottom intersection point X1 'and the fourth center line are Y1', the intersection points of parallel lines drawn from the right second bottom intersection point X2 'and the first second pipe deployment lines on the left and right sides of the fourth center line are Y2' and Y3 ', the intersection points of parallel lines drawn from the right third bottom intersection point X3' and the second pipe deployment lines on the left and right sides of the fourth center line are Y4 'and Y5', the intersection points of parallel lines drawn from the right fourth bottom intersection point X4 'and the third second pipe deployment lines on the left and right sides of the fourth center line are Y6' and Y7 ', the intersection points of parallel lines drawn from the right fifth bottom intersection point X5' and the fourth second pipe deployment lines on the left and right sides of the fourth center line are Y8 'and Y9', respectively, the intersection points of the parallel line made from the sixth bottom intersection point X6 'on the right side and the fifth second pipe deployment lines on the left and right sides of the fourth center line are Y10' and Y11 ', respectively, and the intersection points of the parallel line made from the seventh bottom intersection point X7' on the right side and the sixth second pipe deployment lines on the left and right sides of the fourth center line are Y12 'and Y13', respectively; connecting the intersection points Y1 '-Y13' in sequence by adopting smooth curves to obtain the bottom edge of the development drawing of the second pipe fitting; similarly, in the same way, parallel lines of a second normal line are made from the top edge of the second pipe fitting and the top intersection point U1 '-U7' of the second bisector to obtain intersection points T1 '-T13', and the intersection points T1 '-T13' are connected in sequence by adopting smooth curves to obtain the top edge of the developed view of the second pipe fitting.

Preferably, the design unfolding method of the small tool further comprises the following steps:

a1, making a side view and a top view of the small tool according to the design and manufacture requirements of the small tool, respectively, projecting the intersection point of the first bisector of the first pipe and the bottom surface of the bottom plate downwards into the top view of the small tool according to the front view in the step S3, taking the intersection point of the projection line and the transverse center line of the bottom plate as a projection point, measuring the vertical distance from each division point 1 '-12' in the first circle to the diameter perpendicular to the first center line in the first circle, translating the length of the vertical distance to the upper side and the lower side of the projection point, and obtaining division points G1-G12 in the vertical direction, wherein the division point 7 'is translated and then superposed with G7, the division point 1' is translated and then superposed with G1, and the division points 2 '-6', 8 '-12' are translated and then respectively correspond to G2-G6, G8-G12; connecting G1-G12 in sequence by adopting a smooth curve to obtain a perforated cross-sectional view of the first pipe fitting on the bottom plate;

a2, projecting downwards to a top view of the small tool along the intersection point of the second bisector of the second pipe fitting and the bottom surface of the bottom plate according to the front view in the step A1, taking the intersection point of the projection line and the transverse center line of the bottom plate as a projection point, measuring the vertical distance from each division point 1 '-12' in the second circle to the diameter perpendicular to the second center line in the second circle, translating the length of the vertical distance to the upper side and the lower side of the projection point, and obtaining division points H1-H12 in the vertical direction, wherein 7 'division points are translated and then overlapped with H1, 1' division points are translated and then overlapped with H7, and other 2 '-6', 8 '-12' division points are translated and then respectively correspond to H8-H12 and H2-H6 one by one; connecting H1-H12 in sequence by adopting a smooth curve to obtain a perforated cross-sectional view of the second pipe fitting on the bottom plate;

a3, in the expanded view of the first tubular member of step S10, parallel lines of the first normal lines are drawn along the intersection points of the first bisector and the top surface of the bottom plate, the intersection points of the parallel lines drawn from the intersection point M1 of the leftmost first bisector and the top surface of the bottom plate and the third center line are N1, the intersection points of the parallel lines drawn from the intersection point M2 of the second bisector and the top surface of the bottom plate and the first tubular member expanded lines on the left and right sides of the third center line are N2 and N3, respectively, the intersection points of the parallel lines drawn from the intersection point M3 of the left first bisector and the top surface of the bottom plate and the second tubular member expanded lines on the left and right sides of the third center line are N4 and N5, the intersection points of the parallel lines drawn from the intersection point M4 of the fourth bisector and the top surface of the left first bisector and the third tubular member expanded lines on the left and right sides of the third center line are N6 and N7, respectively, and the intersection points of the left and the fifth bisector and the first bisector and the bottom surface M5 of the left side and the left side of the left side first bisector and the bottom plate are drawn from the intersection points of the third first bisector and the top surface The intersection points of the four first pipe deployment lines are respectively N8 and N9, the intersection points of a parallel line made from the intersection point M6 of the sixth first bisector on the left side and the top surface of the bottom plate and the fifth first pipe deployment lines on the left and right sides of the third center line are respectively N10 and N11, and the intersection points of a parallel line made from the intersection point M7 of the seventh first bisector on the left side and the top surface of the bottom plate and the sixth first pipe deployment lines on the left and right sides of the third center line are respectively N12 and N13; sequentially connecting the intersection points N1-N13 by adopting smooth curves to obtain the top edge of the first pipe fitting bottom plate mounting line;

a4, according to the front view in the step A3, in the same way as in the step A3, respectively making parallel lines of a first normal line along the intersection points M1 '-M7' of the first bisector and the bottom surface of the bottom plate to obtain the intersection points of the parallel lines of the first normal line and the corresponding unfolding lines of the first pipe fitting, wherein the intersection points are N1 '-N13', and the intersection points N1 '-N13' are sequentially connected by adopting smooth curves to obtain the bottom edge of the bottom plate mounting line of the first pipe fitting;

a5, in the expanded view of the second tube member of step S13, the parallel line of the second normal line is drawn along the intersection point of the second bisector and the top surface of the bottom plate, the intersection point of the parallel line drawn from the intersection point P1 of the rightmost second bisector and the top surface of the bottom plate and the fourth center line is Q1, the intersection points of the parallel line drawn from the intersection point P2 of the second bisector and the top surface of the bottom plate and the first second tube member expanded lines on the left and right sides of the fourth center line are Q2 and Q3, respectively, the intersection points of the parallel line drawn from the intersection point P3 of the third bisector on the right side and the top surface of the bottom plate and the second tube member expanded lines on the left and right sides of the fourth center line are Q4 and Q5, the intersection points of the parallel line drawn from the intersection point P4 of the fourth bisector on the right side and the top surface of the fourth bisector and the third tube member expanded lines on the left and right sides are Q6 and Q7, respectively, and Q7 are drawn from the intersection point P5 of the fifth bisector and the top surface of the right side of the fifth bisector and the right side of the bottom plate The intersection points of the four second pipe deployment lines are respectively Q8 and Q9, the intersection points of a parallel line drawn from the intersection point P6 of the sixth second bisector on the right side and the top surface of the bottom plate and the fifth second pipe deployment lines on the left and right sides of the fourth center line are respectively Q10 and Q11, and the intersection points of a parallel line drawn from the intersection point P7 of the seventh second bisector on the right side and the top surface of the bottom plate and the sixth second pipe deployment lines on the left and right sides of the fourth center line are respectively Q12 and Q13; sequentially connecting the intersection points Q1-Q13 by adopting smooth curves to obtain the top edge of the second pipe fitting bottom plate mounting line;

and A6, according to the front view in the step A5, in the same way as in the step A5, making parallel lines of a second normal line along the intersection points P1 '-P7' of the second bisector and the bottom surface of the bottom plate, obtaining the intersection points of the parallel lines of the second normal line and the corresponding second pipe unfolding lines, wherein the intersection points are Q1 '-Q13', and connecting the intersection points Q1 '-Q13' in sequence by adopting smooth curves to obtain the bottom edge of the second pipe bottom plate mounting line.

Preferably, the projection accuracy of the projection line in the above steps S9, a1, a2 is ± 0.1 mm.

Preferably, the accuracy before and after the translation in the above steps S5, S6, S8, S11, S12, a1, a2 is ± 0.3 mm.

Preferably, the accuracy of the equally dividing in the above steps S2, S3, S10, S13 is ± 0.1 mm.

Preferably, the accuracy of the circumferential length in the above steps S10 and S13 is ± 0.3 mm.

As described above, the design deployment method of the small tool of the present invention has the following beneficial effects:

the invention relates to a design and expansion method of a small-sized tool, which is characterized in that a special tool design drawing is drawn through CAD software, and the special tool is expanded by a design lofting and expansion method, so that plate material marking is carried out, through holes are directly cut out in the processes of blanking and cutting, then rolling is carried out, and the special tool is assembled and welded through subsequent operation, so that the precision of penetrating and opening holes of pipes of the small-sized tool is improved, and the production efficiency is improved.

Drawings

FIG. 1 is a front view of a compact tooling of the present invention;

FIG. 2 shows step B2 in the method for designing and unfolding a small tool according to the present invention;

FIG. 3 shows step B3 in the method for designing and unfolding a small tool according to the present invention;

FIG. 4 shows step B4 in the method for designing and unfolding a small tool according to the present invention;

FIG. 5 shows step B5 in the method for designing and unfolding a small tool according to the present invention;

FIG. 6 shows step B6 in the method for designing and unfolding a small tool according to the present invention;

FIG. 7 shows step B7 in the method for designing and unfolding a small tool according to the present invention;

FIG. 8 shows step B8 in the method for designing and unfolding a compact tool of the present invention;

FIG. 9 shows step B9 in the method for designing and unfolding a compact tool of the present invention;

FIG. 10 shows step B10 in the method for designing and unfolding a compact tool of the present invention;

FIG. 11 shows step B11 in the method for designing and unfolding a compact tool of the present invention;

FIG. 12 shows step B12 in the method for designing and unfolding a compact tool of the present invention;

FIG. 13 shows step B13 in the method for designing and unfolding a compact tool of the present invention;

FIG. 14 is a top view of the compact tooling of the present invention;

FIG. 15 shows step C1 in the method for designing and unfolding a compact tool of the present invention;

FIG. 16 shows step C2 in the method for designing and unfolding the small tool according to the present invention;

FIG. 17 shows step C3 in the method for designing and unfolding a compact tool of the present invention;

FIG. 18 shows step C4 in the method for designing and deploying a compact tool of the present invention;

FIG. 19 shows step C5 in the method for designing and deploying a compact tool of the present invention;

FIG. 20 shows step C6 in the method for designing and deploying a compact tool of the present invention;

fig. 21 is a left side view of the compact tooling of the present invention.

Description of the element reference numerals

1 a first pipe member;

101 a first bisector;

102 a first centerline;

103 a first circle;

104 a first line of through-holes;

105 a second through perforation line;

2 a second tubular member;

201 a second bisector;

202 a second centerline;

203 second circle;

204 a first intersection line;

3, a bottom plate;

4 a first normal line;

5, installing a line on a bottom plate of the first pipe fitting;

6 a first tapping sample line;

601 a second holed sample line;

7 a first tube deployment line;

701 a third centerline;

8 a second normal line;

9 a second pipe fitting bottom plate mounting line;

10 a second tube deployment line;

1001 fourth centerline.

Detailed Description

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.

It should be understood that the structures, ratios, sizes, and the like shown in the drawings and described in the specification are only used for matching with the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions under which the present invention can be implemented, so that the present invention has no technical significance, and any structural modification, ratio relationship change, or size adjustment should still fall within the scope of the present invention without affecting the efficacy and the achievable purpose of the present invention. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.

As shown in fig. 1, the invention provides a small-sized tool for assembling and positioning a product in a ship building process; the small-sized tool mainly comprises a first pipe fitting 1, a second pipe fitting 2 penetrating through the first pipe fitting 1, and a bottom plate 3 penetrating through the first pipe fitting 1 and the second pipe fitting 2. In the embodiment, the diameter of the first pipe fitting 1 is phi 89mm, the diameter of the second pipe fitting 2 is phi 60mm, and since the first pipe fitting 1 and the second pipe fitting 2 are both non-standard parts, a flat plate needs to be selected for rolling, processing and welding, and the second pipe fitting 2 of the small-sized tool needs to penetrate through the first pipe fitting 1, if the first pipe fitting 1 is provided with a through hole after rolling, the precision is not high, the operation steps are complex, and the production efficiency is low; as shown in fig. 1, in the present embodiment, the weld position of the first pipe member 1 is on the right side edge of the first pipe member 1, and the weld position of the second pipe member 2 is on the left side edge of the second pipe member 2.

The invention provides a design unfolding method of a small tool, which is used for directly forming a through hole in the process of rolling a flat plate and then performing rolling welding, and can effectively improve the labor efficiency and the precision. Therefore, the first pipe fitting 1 and the second pipe fitting 2 are unfolded by adopting a design unfolding method of a small tool, the position of a through hole in the first pipe fitting 1 is determined, and a flat plate is welded and fixed to the first pipe fitting 1 after being rolled; and then, the flat plate is welded and fixed into the second pipe fitting 2 after being rolled, and the second pipe fitting 2 directly penetrates through the through hole of the first pipe fitting 1 to be welded and fixed, so that the efficiency is improved, and the labor intensity is reduced.

The application relates to a design unfolding method of a small tool, which comprises the following specific steps:

b1, making a front view of the small tool according to the design and manufacturing requirements of the small tool, as shown in FIG. 1; the design and manufacture requirements of the small tool comprise the height, the diameter and the length of a first pipe fitting 1 and a second pipe fitting 2 in the small tool; height, length of the bottom plate 3.

B2, as shown in fig. 2, in the front view of B1, a first circle 103 is drawn with the diameter Φ 89 of the first pipe member 1, and the first circle 103 is tangent to the extension lines of both side edges of the first pipe member 1; equally dividing the first circle 103 into 12 parts along the circumference, and respectively marking the dividing points as 1 '-12'; axial extensions of the first tubular member 1 are made along the respective division points 1 '-12', each extending to the top end of the first tubular member 1, said axial extensions being first bisectors 101. Wherein, two division points 1 ', 7' are the tangent points of the first circle 103 and the two side extension lines of the first pipe fitting 1, two division points 2 ', 12' are on the same first bisector 101, two division points 3 ', 11' are on the same first bisector 101, two division points 4 ', 10' are on the same first bisector 101, two division points 5 ', 9' are on the same first bisector 101, and two division points 6 ', 8' are on the same first bisector 101. Thus, the first bisectors 101 have seven total, and the two first bisectors 101 on the side overlap the two sides of the first pipe 1.

B3, as shown in fig. 3, in the front view of B2, a second circle 203 is drawn with the diameter Φ 60 of the second pipe member 2, and the second circle 203 is tangent to the extension lines of both side edges of the second pipe member 2; equally dividing the second circle 203 into 12 parts along the circumference, and respectively marking the division points as 1 '-12'; axial extensions of the second tubular element 2 are made along the respective division points 1 "-12", each extending to the top end of the second tubular element 2, said axial extensions being the second bisector 201. Wherein 1 ', 7' two division points are tangent points of the second circle 203 and two side extension lines of the second pipe fitting 2, 2 ', 12' two division points are on the same second bisector 201, 3 ', 11' two division points are on the same second bisector 201, 4 ', 10' two division points are on the same second bisector 201, 5 ', 9' two division points are on the same second bisector 201, and 6 ', 8' two division points are on the same second bisector 201. Thus, the second bisectors 201 are seven in total, and the two second bisectors 201 on the side overlap the two sides of the second pipe 2.

B4, as shown in fig. 4, in the front view of B3, a line passing through the center of the first circle 103 in the plurality of first bisectors 101 is defined as a first center line 102, i.e., the first bisector 101 where the two dividing points 4 ', 10' are located; a line passing through the center of the second circle 203 in the plurality of second bisectors 201 is defined as a second center line 202, namely, the second bisector 201 where two dividing points of 4 "and 10" are located; the seven first bisectors 101 of the first pipe element 1 intersect the second centerline 202 of the second pipe element 2, and the seven intersections are defined as a1-a7 from bottom to top, so that the intersection of the first centerline 102 and the second centerline 202 is a 4.

B5, as shown in fig. 5, in the front view of B4, making a vertical line along the extension line of the second centerline 202, translating the seven intersection points a1-a7 onto the extension line of the second centerline 202 and making the intersection points a4 and the intersection points of the second centerline 202 coincide with the vertical line, thus obtaining seven intersection points B1-B7, wherein the intersection point B4 coincides with the intersection points of the second centerline 202 and the vertical line.

B6, as shown in fig. 6, in the front view of B5, the perpendicular distance from each division point 1 ' -12 ' in the first circle 103 to the diameter perpendicular to the first center line 102 in the first circle 103 is measured along seven intersection points B1-B7 as a perpendicular line of the second center line 202, and the length of the perpendicular distance is translated to the perpendicular line of seven intersection points B1-B7, so as to obtain twelve points C1-C12, i.e., point C1 is on the extension line of the second center line 202, and the perpendicular distance between the point C2 and the extension line of the second center line 202 is the perpendicular distance between the division point 2 ' and the diameter of the first circle 103, and so on; connecting twelve points C1-C12 in sequence by adopting a smooth curve to obtain an elliptical section of the first pipe fitting 1; wherein B1 and C1 coincide, B7 and C7 coincide.

B7, as shown in fig. 7, in the front view of B6, the seven second bisectors 201 of the second tube 2 are extended and run through the elliptical cross-section of the first tube 1, resulting in fourteen intersection points D1-D14; meanwhile, an extension line of the seven bisectors 201 is defined as a first intersecting line 204.

B8, as shown in fig. 8, in the front view of B7, the second center line 202 divides the elliptical cross-section of the first pipe 1 into two halves, and the elliptical cross-section on the right half side of the first center line 102 and the first intersection line 204 are selected and translated to the top end of the first pipe 1, so that the first center line 102 of the first pipe 1 passes through the center point of the translated elliptical cross-section.

B9, as shown in fig. 9, in the front view of B8, the intersection points of the right half and the translated elliptical cross section and the four first intersecting lines 204 are D1 to D8, respectively, the intersection points D1 and D8 are on the top end line of the first pipe fitting 1, projection lines perpendicular to the top end line of the first pipe fitting 1 are drawn along six intersection points D2 to D6, so that the six projection lines have six projection points with the top end line of the first pipe fitting 1, parallel lines of the first bisector 101 are drawn along the six projection points and the intersection points D1 and D8, and the eight parallel lines intersect with the second bisector 201, respectively. More specifically, the intersection points of the parallel line made from the intersection point D1 and the two outermost second bisectors 201 are E1 and E7, respectively, the intersection points of the parallel line made from the projection point of the intersection point D2 and the right second bisector 201 and the left second bisector are E2 and E6, respectively, the intersection points of the parallel line made from the projection point of the intersection point D3 and the right third second bisector 201 and the left third bisector are E3 and E5, respectively, and the intersection points of the parallel line made from the projection point of the intersection point D4 and the middle second bisector 201 and the intersection points are E4; similarly, the intersection points of the parallel line made from the intersection point D8 and the two outermost second bisectors 201 are E8 and E14, respectively, the intersection points of the parallel line made from the projection point of the intersection point D7 and the right second bisector 201 and the left second bisector are E9 and E13, respectively, the intersection points of the parallel line made from the projection point of the intersection point D6 and the right third bisector 201 and the left third bisector are E10 and E12, respectively, and the intersection points of the parallel line made from the projection point of the intersection point D5 and the middle second bisector 201 are E11. The first through-going hole lines 104 of the first tube element 1 are obtained by connecting E1-E7 in sequence using a smooth curve, and the second through-going hole lines 105 of the first tube element 1 are obtained by connecting E8-E14 in sequence using a smooth curve.

B10, as shown in fig. 10, in the front view of B9, an expanded view of the first tube member 1 is made, a first normal line 4 is made perpendicular to the first center line 102, and the expanded circumferential length of the first tube member 1 is calculated by using the formula l ═ pi (D-1/2t × 2); wherein l: circle development girth, pi: circumference ratio 3.1416, D: major circle outer diameter, t: the thickness of the tube; in this embodiment, D is 89mm, t is 5mm, and l is 3.1416 (89-1/(2) 5) 2) is 278.9 mm. Selecting 278.9mm in length on the first normal line 4 and dividing into twelve equal parts, each part being 23.24mm in length; the first tube spread lines 7 are obtained by making parallel lines of the first centerline 102 along the twelve division points of the 278.9mm length, the first tube spread lines 7 are thirteen, and the middle first tube spread line 7 is defined as a third centerline 701. Parallel lines of a first normal line 4 are made at seven bottom intersections of the bottom edges of the first tube members 1 with the first bisector 101, intersections of parallel lines made at a leftmost bottom intersection X1 with the third centerline 701 are Y1, intersections of parallel lines made at a second bottom intersection X2 on the left side with the first tube deployment lines 7 on the left and right sides of the third centerline 701 are Y2 and Y3, respectively, intersections of parallel lines made at a third bottom intersection X3 on the left side with the second first tube deployment lines 7 on the left and right sides of the third centerline 701 are Y4 and Y5, respectively, intersections of parallel lines made at a fourth bottom intersection X4 on the left side with the third first tube deployment lines 7 on the left and right sides of the third centerline 701 are Y6 and Y7, intersections of parallel lines made at a fifth bottom intersection X5 on the left side with the fourth tube deployment lines 7 on the left and right sides of the third centerline 701 are Y8 and Y9, respectively, the intersections of parallel lines from the sixth bottom intersection point X6 on the left side and the fifth first tube deployment lines 7 on the left and right sides of the third center line 701 are respectively Y10 and Y11, and the intersections of parallel lines from the seventh bottom intersection point X7 on the left side and the sixth first tube deployment lines 7 on the left and right sides of the third center line 701 are respectively Y12 and Y13; the thirteen intersections Y1-Y13 were connected in sequence by a smooth curve to obtain the bottom edge of the developed view of the first tube element 1. Similarly, in the same way, the top edge of the first pipe element 1 is parallel to the seven top intersections U1-U7 of the first bisector 101, specifically: the intersection points of the parallel lines from the leftmost top intersection point U1 and the third center line 701 are T1, the intersection points of the parallel lines from the second top intersection point U2 on the left side and the first tube deployment lines 7 on the left and right sides of the third center line 701 are T2 and T3, respectively, the intersection points of the parallel lines from the third top intersection point U3 on the left side and the second tube deployment lines 7 on the left and right sides of the third center line 701 are T4 and T5, the intersection points of the parallel lines from the fourth top intersection point U4 on the left side and the third tube deployment lines 7 on the left and right sides of the third center line 701 are T6 and T7, respectively, the intersection points of the parallel lines from the fifth top intersection point U5 on the left side and the fourth tube deployment lines 7 on the left and right sides of the third center line 701 are T8 and T9, the intersection points of the parallel lines from the sixth top intersection point U6 on the left side and the fifth tube deployment lines 7 on the left and right sides of the third center line 701 are T10 and T11, respectively, intersections of parallel lines made from a seventh top intersection point U7 on the left side and sixth first pipe deployment lines 7 on the left and right sides of the third center line 701 are T12 and T13 respectively; the thirteen top intersections T1-T13 were connected in sequence by a smooth curve to obtain the top edge of the developed view of the first tube element 1.

B11, as shown in fig. 11, in the developed view of the first tube 1 of B10, the seven parallel lines are parallel lines of the first normal line 4 along the seven points E1 to E7 on the first through-going hole 104, and there are seven parallel lines in total, the seven parallel lines form seven intersections F1 to F7 with the first tube development line 7 on the leftmost side, and the seven parallel lines form seven intersections F1 '-F7' with the first tube development line 7 on the rightmost side. Measuring the vertical distance from each division point of 1 '-7' in the second circle 203 to the diameter perpendicular to the second center line 202 in the second circle 203, translating the length of the vertical distance to the right side of F1-F7 one by one along the parallel line of the first normal line 4 to obtain a right translation point of F1-F7, translating the length of the vertical distance to the left side of F1 '-F7' one by one along the parallel line of the first normal line 4 to obtain a left translation point of the point F1 '-F7', sequentially connecting the seven right translation points of the F1-F7 to the right by using a smooth curve, and sequentially connecting the seven left translation points of the F1 '-F7' to the left by using a smooth curve to respectively obtain two half arcs, namely obtaining two first open pore solid sample lines 6; after the first pipe 1 is rolled along the third center line 701, F1 and F1 'are overlapped, and F7 and F7' are overlapped.

B12, as shown in fig. 12, in the developed view of the first tube 1 of B11, seven parallel lines are taken as the parallel lines of the first normal line 4 along the seven points E8 to E14 on the second through hole line 105, and seven parallel lines are made in total, and form seven intersection points F8 to F14 with the third center line 701, respectively. Measuring the vertical distance from each division point of 1 '-12' in the second circle 203 to the diameter perpendicular to the second center line 202 in the second circle 203, translating the length of the vertical distance along the parallel line of the first normal line 4 to the left and right sides of F8-F14 in a one-to-one correspondence manner, wherein the division point of 7 'is translated and then coincided with the intersection point of F8, the division point of 1' is translated and then coincided with the intersection point of F14, the translation point distances from the left and right sides of the rest of F9-F13 are in one-to-one correspondence with the vertical distances from each division point of 2 '-6', 8 '-12' to the diameter of the second circle 203, and sequentially connecting the twelve translation points by using a smooth curve to obtain the second holed solid sample line 601.

B13, as shown in fig. 13, in the front view of B9, the second tube 2 is developed, the second normal line 8 is vertically made along the second center line 202, and the circumferential length of the second tube 2 to be developed is calculated by using the formula l ═ pi (d-1/2t × 2); wherein l: circle development girth, pi: circumference ratio 3.1416, d: small circular outer diameter, t: the thickness of the tube; in the present embodiment, d is 60mm, t is 5mm, and l is 3.1416 (60-1/(2) 5) 2) is 187.9 mm. Selecting 187.9mm length on the second normal line 8 and dividing into twelve equal parts, each part is 15.65mm in length; the second centerline 202 is parallel to the twelve division points 187.9mm in length, and the second tube deployment line 10 is obtained, the second tube deployment line 10 is thirteen, and the middle second tube deployment line 10 is defined as the fourth centerline 1001. Parallel lines of the second normal line 8 are drawn from seven bottom intersections of the bottom edges of the second tube 2 and the second bisector 201, intersections of parallel lines drawn from the rightmost bottom intersection X1 ' and the fourth centerline 1001 are Y1 ', intersections of parallel lines drawn from the second bottom intersection X2 ' on the right side and the first second tube deployment lines 10 on the left and right sides of the fourth centerline 1001 are Y2 ' and Y3 ', respectively, intersections of parallel lines drawn from the third bottom intersection X3 ' on the right side and the second tube deployment lines 10 on the left and right sides of the fourth centerline 1001 are Y4 ' and Y5 ', respectively, intersections of parallel lines drawn from the fourth bottom intersection X4 ' on the right side and the third second tube deployment lines 10 on the left and right sides of the fourth centerline 1001 are Y6 ' and Y7 ', respectively, intersections of parallel lines drawn from the fifth bottom intersection X5 ' on the right side and the second tube deployment lines 10 on the left and right sides of the fourth centerline 1001 are Y8 ' and Y9 ', respectively, 9, 3652 ', the intersections of the parallel lines from the sixth bottom intersection point X6 'on the right side and the fifth second tube deployment lines 10 on the left and right sides of the fourth center line 1001 are respectively Y10' and Y11 ', and the intersections of the parallel lines from the seventh bottom intersection point X7' on the right side and the sixth second tube deployment lines 10 on the left and right sides of the fourth center line 1001 are respectively Y12 'and Y13'; the thirteen intersections Y1 '-Y13' are connected in sequence by a smooth curve to obtain the bottom edge of the developed view of the second tube 2. Similarly, in the same manner, the parallel line of the second normal line 8 is formed from the top edge of the second pipe 2 and seven top intersection points U1 '-U7' of the second bisector 201, the intersection points of the parallel line formed from the rightmost top intersection point U1 'and the fourth centerline 1001 are T1', the intersection points of the parallel line formed from the second top intersection point U2 'on the right side and the first second pipe deployment line 10 on the left and right sides of the fourth centerline 1001 are T2' and T3 ', respectively, the intersection points of the parallel line formed from the third top intersection point U3' on the right side and the second pipe deployment line 10 on the left and right sides of the fourth centerline 1001 are T4 'and T5', respectively, the intersection points of the parallel line formed from the fourth top intersection point U4 'on the right side and the third pipe deployment line 10 on the left and right sides of the fourth centerline 1001 are T6' and T7 ', respectively, and the intersection points of the left and right second pipe deployment line 1001 formed from the fifth top intersection point U5' on the right side of the fourth centerline 1001 T8 'and T9', the intersections of the parallel lines from the sixth top intersection point U6 'on the right side with the fifth second tube deployment lines 10 on the left and right sides of the fourth centerline 1001 are T10' and T11 ', respectively, and the intersections of the parallel lines from the seventh top intersection point U7' on the right side with the sixth second tube deployment lines 10 on the left and right sides of the fourth centerline 1001 are T12 'and T13', respectively; the thirteen top intersections T1 '-T13' are connected in sequence by a smooth curve to obtain the top edge of the developed view of the second tube 2.

Preferably, the method for designing and unfolding the small tool according to the present invention further comprises the steps of:

c1, in the front view of B3, as shown in FIG. 21, a left view of the small tool is made; a top view of the small tooling bottom plate 3 is made according to the left side view as shown in fig. 21, as shown in fig. 14; as shown in fig. 15, seven first bisectors 101 of the first tube member 1 are projected downward from the intersection point of the bottom surface of the bottom plate 3 according to the front view of B3, the intersection point of the projection line and the transverse center line of the bottom plate 3 is a projection point, the projection points are seven in total, the vertical distance from each of the division points 1 '-12' in the first circle 103 to the diameter perpendicular to the first center line 102 in the first circle 103 is measured, the length of the vertical distance is translated to the upper and lower sides of the seven projection points, twelve division points G1-G12 are obtained in the vertical direction, wherein the division point 7 'is translated and then coincides with G7, the division point 1' is translated and then coincides with G1, and the division points 2 '-6' and 8 '-12' are translated and then respectively correspond to G2-G6 and G8-G12. The sectional view of the opening of the first pipe element 1 in the bottom plate 3 is obtained by connecting the G1-G12 in sequence by smooth curves.

C2, as shown in fig. 16, in the front view of C1, the intersection points of the seven second bisectors 201 of the second pipe 2 and the bottom surface of the bottom plate 3 are projected downward, the intersection points of the projected lines and the transverse center line of the bottom plate 3 are projected points, the projected points are seven in total, the vertical distance from each divided point of 1 "-12" in the second circle 203 to the diameter perpendicular to the second center line 201 in the second circle 203 is measured, translating the length of the vertical distance to the upper side and the lower side of seven projection points to obtain twelve segmentation points H1-H12 in the vertical direction, the 7 'division point is overlapped with H1 after translating, the 1' division point is overlapped with H7 after translating, other 2 '-6' division points and 8 '-12' division points are respectively corresponding to H8-H12 and H2-H6 after translating, and H1-H12 is sequentially connected by adopting a smooth curve to obtain an opening cross-sectional view of the second pipe fitting 2 on the bottom plate 3.

C3, as shown in FIG. 17, in the front view of B12, the intersections of seven first bisectors 101 with the top surface of the bottom plate 3 are parallel lines of the first normal line 4, the intersections of parallel lines from the intersection M1 of the leftmost first bisector 101 with the top surface of the bottom plate 3 with the third centerline 701 are N1, the intersections of parallel lines from the intersection M2 of the second left first bisector 101 with the top surface of the bottom plate 3 with the first tube development lines 7 on the left and right sides of the third centerline 701 are N2 and N3, respectively, the intersections of parallel lines from the intersection M3 of the third left first bisector 101 with the top surface of the bottom plate 3 with the second tube development lines 7 on the left and right sides of the third centerline 701 are N4 and N5, and the intersections of parallel lines from the intersection M4 of the fourth left first bisector 101 with the top surface of the bottom plate 3 with the third tube development lines on the left and right sides of the third centerline 701 are N6 and N7, respectively, intersections of parallel lines drawn from an intersection point M5 of the fifth first bisector 101 on the left side and the top surface of the bottom plate 3 and the fourth tube deployment lines 7 on the left and right sides of the third center line 701 are N8 and N9, respectively, intersections of parallel lines drawn from an intersection point M6 of the sixth first bisector 101 on the left side and the top surface of the bottom plate 3 and the fifth tube deployment lines 7 on the left and right sides of the third center line 701 are N10 and N11, respectively, intersections of parallel lines drawn from an intersection point M7 of the seventh first bisector 101 on the left side and the top surface of the bottom plate 3 and the sixth tube deployment lines 7 on the left and right sides of the third center line 701 are N12 and N13, and thirteen intersection points N1-N13 are connected in sequence by using a smooth curve, so that the top edge of the first bottom plate installation line 5 is obtained.

C4, as shown in fig. 18, in the front view of C3, in the same way as in C3, the intersection points M1 '-M7' of the seven first bisectors 101 with the bottom surface of the bottom plate 3 are parallel to the first normal line 4, specifically: the intersection points of the parallel line from the intersection point M1 ' of the leftmost first bisector 101 with the bottom surface of the bottom plate 3 and the third center line 701 are N1 ', the intersection points of the parallel line from the intersection point M2 ' of the second left first bisector 101 with the bottom surface of the bottom plate 3 and the first tube deployment lines 7 on the left and right sides of the third center line 701 are N2 ' and N3 ', the intersection points of the parallel line from the intersection point M3 ' of the left third first bisector 101 with the bottom surface of the bottom plate 3 and the second first tube deployment lines 7 on the left and right sides of the third center line 701 are N4 ' and N5 ', the intersection points of the parallel line from the intersection point M4 ' of the fourth left first bisector 101 with the bottom surface of the bottom plate 3 and the third tube deployment lines 7 on the left and right sides of the third center line 701 are N6 ' and N7 ', the intersection points of the parallel line from the intersection points M5 ' of the fifth left first bisector 101 with the bottom surface of the bottom plate 3 and the bottom surface of the third center line 701 and the fourth tube deployment lines 7 on the left and the fourth tube deployment lines 701 are N1 ', respectively Respectively N8 'and N9', the intersections of the parallel lines from the intersection point M6 'of the left sixth first bisector 101 with the bottom surface of the bottom plate 3 and the fifth first tube deployment lines 7 on the left and right sides of the third center line 701 are respectively N10' and N11 ', the intersections of the parallel lines from the intersection point M7' of the left seventh first bisector 101 with the bottom surface of the bottom plate 3 and the sixth first tube deployment lines 7 on the left and right sides of the third center line 701 are respectively N12 'and N13', and the thirteen intersection points N1 '-N13' are sequentially connected by adopting smooth curves to obtain the bottom edge of the first tube bottom plate mounting line 5.

C5, as shown in FIG. 19, in the front view of B13, the intersection points of the seven second bisectors 201 with the top surface of the bottom plate 3 are parallel lines of the second normal line 8, the intersection points of the parallel lines from the intersection point P1 of the rightmost second bisector 201 with the top surface of the bottom plate 3 are Q1 with the fourth center line 1001, the intersection points of the parallel lines from the intersection point P2 of the second bisector 201 on the right side with the top surface of the bottom plate 3 with the first second tube deployment line 10 on the left and right sides of the fourth center line 1001 are Q2 and Q3, the intersection points of the parallel lines from the intersection point P3 of the third bisector 201 on the right side with the top surface of the bottom plate 3 with the second tube deployment line 10 on the left and right side of the fourth center line 1001 are Q4 and Q5, the intersection points of the parallel lines from the intersection point P4 of the fourth bisector 201 on the right side with the top surface of the bottom plate 3 with the third tube deployment line 10 on the left and right side of the fourth center line 1001 are Q6 and Q7, the intersection points of the parallel line made from the intersection point P5 of the fifth right second bisector 201 and the top surface of the bottom plate 3 and the fourth second tube deployment lines 10 on the left and right sides of the fourth center line 1001 are Q8 and Q9 respectively, the intersection points of the parallel line made from the intersection point P6 of the sixth right second bisector 201 and the top surface of the bottom plate 3 and the fifth second tube deployment lines 10 on the left and right sides of the fourth center line 1001 are Q10 and Q11 respectively, and the intersection points of the parallel line made from the intersection point P7 of the seventh right second bisector 201 and the top surface of the bottom plate 3 and the sixth second tube deployment lines 10 on the left and right sides of the fourth center line 1001 are Q12 and Q13 respectively; the thirteen intersections Q1-Q13 were connected in sequence using a smooth curve to obtain the top edge of the second tube panel mounting line 9.

C6, as shown in FIG. 20, in the front view of C5, in the same manner as in C5, the intersection points P1 '-P7' of the seven second bisectors 201 with the bottom surface of the bottom plate 3 are parallel lines of the second normal line 8, respectively, the intersection points of the parallel lines from the intersection point P1 'of the rightmost second bisector 201 with the bottom surface of the bottom plate 3 and the fourth center line 1001 are Q1', the intersection points of the parallel lines from the intersection point P2 'of the rightmost second bisector 201 with the bottom surface of the bottom plate 3 and the first second tube deployment lines 10 on the left and right sides of the fourth center line 1001 are Q2' and Q3 ', respectively, and the intersection points P3' of the parallel lines from the rightmost third bisector 201 with the bottom surface of the bottom plate 3 and the second tube deployment lines 10 on the left and right sides of the fourth center line 1001 are Q4 'and Q5', respectively, and the intersection points P56 'of the intersection points P4' of the fourth bisector 201 on the right side with the bottom surface of the fourth center line 1001 are Q6356 and the second tube deployment lines Points are respectively Q6 ' and Q7 ', the intersection points of a parallel line drawn from the intersection point P5 ' of the fifth right bisector 201 and the bottom surface of the bottom plate 3 and the fourth tube deployment lines 10 on the left and right sides of the fourth center line 1001 are respectively Q8 ' and Q9 ', the intersection points of a parallel line drawn from the intersection point P6 ' of the sixth right bisector 201 and the bottom surface of the bottom plate 3 and the fifth tube deployment lines 10 on the left and right sides of the fourth center line 1001 are respectively Q10 ' and Q11 ', the intersection points of a parallel line drawn from the intersection point P7 ' of the second right bisector 201 and the bottom surface of the bottom plate 3 and the sixth tube deployment lines 10 on the left and right sides of the fourth center line 1001 are respectively Q12 ' and Q13 ', and the thirteen intersection points Q1 ' -Q13 ' are sequentially connected by adopting a smooth curve, and the bottom edge of the second tube bottom plate installation line 6 is obtained.

Preferably, in this embodiment, the projection accuracy of the projection line is ± 0.1mm, the accuracy before and after translation is ± 0.3mm, the accuracy of the bisection is ± 0.1mm, and the calculation accuracy of the circumferential perimeter is ± 0.3 mm.

In the small-sized tool and the design and development method thereof, an operator firstly draws a front view and a top view of the small-sized tool according to drawing software according to the requirement of installing a positioning device in the ship building process, respectively calculates the positions and the sizes of two through holes on a first pipe fitting 1 flat plate, the positions and the sizes of the through holes on a bottom plate 3 of a first pipe fitting 1 and a second pipe fitting 2, and the positions of the top edge and the bottom edge of the first pipe fitting 1 and the second pipe fitting 2 on the bottom plate 3 according to a translation method and a projection method related in the design and development method of the small-sized tool, then selects, cuts, rolls and assembles the first pipe fitting 1, the second pipe fitting 2 and the bottom plate 3 according to the calculated positions, thereby realizing the rapid manufacture of the small-sized tool, improving the production efficiency, and simultaneously positioning the load requirement of the device according to the requirement, the small-sized tools with various sizes are manufactured, and the application range is wide.

Therefore, the invention effectively overcomes various defects in the prior art and has high industrial utilization value.

The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.