阅读说明：本技术 基于三坐标的盘式零件周向榫槽检测方法 (Disc type part circumferential mortise detection method based on three coordinates ) 是由 卯秉陇 郑冬财 袁玉华 王代权 蓝祖沛 陈飞 邓针 喻光勇 周醇 于 2021-07-06 设计创作，主要内容包括：本发明公开了一种基于三坐标的盘式零件周向榫槽检测方法,待测量的盘式零件的外圆周上有一圈倾斜的榫槽,这圈榫槽的内侧有一圈角向孔,测量步骤包括：A将零件固定在基准平台上建立坐标系；B测量零件中心、首孔中心和首槽中心,得到首槽基准面中心相较于首孔偏移的角度α；C选择待测榫槽测量,得到选槽基准面中心相较于首孔偏移的角度ε；D计算选槽的实际角度θ＝ε±α。本发明针对现有技术只能对首槽进行测量,不能测量其他榫槽是否合格,也不能检测首槽的偏移量的技术问题,检测出尺寸C(榫槽旋转半径)、角度δ(榫槽倾角)、尺寸B(首槽偏移值),可以对圆周上的任一榫槽进行测量。(The invention discloses a disc part circumferential mortise detection method based on three coordinates, wherein a circle of inclined mortise is arranged on the outer circumference of a disc part to be measured, a circle of angular holes are arranged on the inner side of the circle of inclined mortise, and the measurement step comprises the following steps: a, fixing a part on a reference platform to establish a coordinate system; b, measuring the center of the part, the center of the first hole and the center of the first groove to obtain an angle alpha of the center of the reference surface of the first groove, which is offset compared with the first hole; c, selecting the mortise to be measured for measurement to obtain an angle epsilon of the center of the selected slot reference surface relative to the offset of the first hole; and D, calculating the actual angle theta of the selected slot as epsilon +/-alpha. The invention aims at the technical problems that the prior art can only measure the first slot, cannot measure whether other mortises are qualified or not, and cannot detect the offset of the first slot, detects the size C (the rotation radius of the mortises), the angle delta (the dip angle of the mortises) and the size B (the offset value of the first slot), and can measure any mortises on the circumference.)

1. A disc type part circumferential mortise detection method based on three coordinates is characterized in that: the outer circumference of the disc part to be measured is provided with a circle of inclined mortises, the inner side of each circle of the mortises is provided with a circle of angular holes, and the measuring step comprises the following steps:

a, fixing a part on a reference platform to establish a coordinate system;

b, measuring the center of the part, the center of the first hole and the center of the first groove to obtain an angle alpha of the center of the reference surface of the first groove, which is offset compared with the first hole;

c, selecting the mortise to be measured for measurement to obtain an angle epsilon of the center of the selected slot reference surface relative to the offset of the first hole;

and D, calculating the actual angle theta of the selected slot as epsilon +/-alpha.

2. The method for detecting the circumferential mortise of the disc type part based on the three coordinates as claimed in claim 1, wherein: the slot is actually shifted by an angle η M ζ compared with the first hole, where ζ is 360 °/n, where M θ/ζ is given, and M is a value obtained by rounding M.

3. The method for detecting the circumferential mortise of the disc-type part based on the three coordinates as claimed in claim 2, is characterized in that: the required technical condition actual value size L ═ P × sin (| θ — η |), where P is the specified measurement range.

4. The method for detecting the circumferential mortise of the three-coordinate-based disc type part according to any one of claims 1 to 3, wherein the process of establishing the coordinate system in the step A is as follows: and starting the three-coordinate measuring machine, firstly selecting a mortise to be measured to align the measuring head to the center of the mortise, then sequentially measuring the reference plane of the part and the positioning hole in the center of the part, and establishing a coordinate system.

5. The method for detecting the circumferential mortise of the three-coordinate-based disc type part according to claim 4, wherein the step of determining the center of the mortise reference plane in the steps B and C is as follows: the left working face, the right working face and the bottom face of the mortise are measured from the longitudinal direction of the mortise, the left working face and the right working face are optimally fitted into a median plane of the two planes, the bottom face of the mortise moves upwards for a distance to the middle position, and the intersection point K1 of the reference plane of the part, the median plane and the bottom face moving plane is used as the center of the reference plane of the mortise.

6. The method for detecting the circumferential mortise of the disc type part based on the three coordinates as claimed in claim 5, wherein: and respectively connecting the center of the first groove reference surface, the center of the first hole and the center of the slot selecting reference surface with the center of the part to obtain 3 straight lines, measuring alpha and epsilon, if the first groove and the slot selecting position are positioned at two sides of the first hole, theta is epsilon + alpha, and if the first groove and the slot selecting position are positioned at the same side of the first hole, theta is epsilon-alpha.

7. The method for detecting the circumferential mortise of the disc type part based on the three coordinates as claimed in claim 5, wherein: and measuring the distance from a K1 point on the first groove to a connecting line between the center of the first hole and the center of the part, and measuring the distance from a K1 point to the center of the part.

8. The method for detecting the circumferential mortise of the disc type part based on the three coordinates as claimed in claim 1, wherein in the step A: the reference platform is placed at a proper position of the body of the three-coordinate measuring machine, two positioning columns are installed on the reference platform, and the disc type part is placed on a cushion block in the center of the reference platform and abuts against the two positioning columns.

Technical Field

The invention relates to a method for detecting the size of a mortise.

Background

At present, the relevant size of a part mortise is detected by adopting a three-coordinate and a special tool, and the part or the special tool which is firstly developed is not used, the three-coordinate is required to be used for measuring, so that an effective detection program can not only quickly detect the actual value of the part, provide accurate reference for field processing, but also greatly shorten field debugging and effectively verify whether the new tool is qualified or not. To the tongue-and-groove on the outer circumference of disc part, need measure the tongue-and-groove and compare the skew angle in order to adjust the clamping of part in the disc mounting hole, still need to measure whether interval between the tongue-and-groove satisfies the requirement in addition, hardly measure when the tongue-and-groove is the chute, prior art can only measure the first groove, can not measure other tongue-and-grooves whether qualified, also can not detect the offset of first groove.

Disclosure of Invention

The purpose of the invention is as follows: aiming at the problem that the inclined mortise on the outer circumference of the disc type part is difficult to measure, the three-coordinate-based mortise size detection method is provided, and any mortise on the circumference can be measured.

The technical scheme of the invention is as follows:

a disc part circumferential mortise detection method based on three coordinates is characterized in that a circle of inclined mortise is arranged on the outer circumference of a disc part to be measured, a circle of angular holes are formed in the inner side of the circle of inclined mortise, and the measurement step comprises the following steps:

a, fixing a part on a reference platform to establish a coordinate system;

b, measuring the center of the part, the center of the first hole and the center of the first groove to obtain an angle alpha of the center of the reference surface of the first groove, which is offset compared with the first hole;

c, selecting the mortise to be measured for measurement to obtain an angle epsilon of the center of the selected slot reference surface relative to the offset of the first hole;

and D, calculating the actual angle theta of the selected slot as epsilon +/-alpha.

The slot is actually shifted by an angle η M ζ compared with the first hole, where ζ is 360 °/n, where M θ/ζ is given, and M is a value obtained by rounding M.

Actual value of required technical conditionWhere P is the specified measurement range.

The process of establishing the coordinate system in the step A comprises the following steps: and starting the three-coordinate measuring machine, firstly selecting a mortise to be measured to align the measuring head to the center of the mortise, then sequentially measuring the reference plane of the part and the positioning hole in the center of the part, and establishing a coordinate system.

The step of determining the center of the reference plane of the mortise in the steps B and C comprises the following steps: the left working face, the right working face and the bottom face of the mortise are measured from the longitudinal direction of the mortise, the left working face and the right working face are optimally fitted into a median plane of the two planes, the bottom face of the mortise moves upwards for a distance to the middle position, and the intersection point K1 of the reference plane of the part, the median plane and the bottom face moving plane is used as the center of the reference plane of the mortise.

And respectively connecting the center of the first groove reference surface, the center of the first hole and the center of the slot selecting reference surface with the center of the part to obtain 3 straight lines, measuring alpha and epsilon, if the first groove and the slot selecting position are positioned at two sides of the first hole, theta is epsilon + alpha, and if the first groove and the slot selecting position are positioned at the same side of the first hole, theta is epsilon-alpha.

And measuring the distance from a K1 point on the first groove to a connecting line between the center of the first hole and the center of the part, and measuring the distance from a K1 point to the center of the part.

The reference platform is placed at a proper position of the body of the three-coordinate measuring machine, two positioning columns are installed on the reference platform, and the disc type part is placed on a cushion block in the center of the reference platform and abuts against the two positioning columns.

The invention has the beneficial effects that:

through measuring part datum plane 10, part locating hole 12, tongue-and-groove working face 7, tongue-and-groove working face 8, tongue-and-groove bottom surface 9, detect part angular orientation locating hole 11 at last, through calculating the theoretical position of tongue-and-groove and the position that actually detects, detect out size C (tongue-and-groove radius of rotation), angle delta (tongue-and-groove inclination), size B (first slot deviant), through the difference size of the actual value of comparison size B with theoretical value, judge the position and the size that part anchor clamps need to adjust, thereby quick adjustment is to on the exact position.

Drawings

FIG. 1 is a schematic view of a part placed on an inspection platform.

Fig. 2 is a top view of the part.

Fig. 3 is a cross-sectional view of a part.

Fig. 4 is an M-direction view of fig. 3.

Fig. 5 is a sectional view taken along line K of fig. 4.

FIG. 6 is a schematic view of measuring the actual offset angle of the mortise slot.

Detailed Description

Example (b):

the three-coordinate-based mortise detection device comprises a three-coordinate measuring machine 1, a disc-type part 2 (a processed mortise), a cushion block 3, a positioning column 4 and a detection reference platform 6 (which can be positioned), wherein the part 2 (the processed mortise) comprises a mortise left working surface 7, a mortise right working surface 8, a mortise bottom surface 9, a part reference plane 10, an angular positioning hole 11 and a positioning hole 12 (which is positioned in the center of the part). As shown in fig. 1 and 2, a detection reference platform 6 is placed at a proper position of a bed of a three-coordinate measuring machine 1, a cushion block 3 is placed at the middle position of the detection reference platform 6, a positioning column 4 is installed on the detection reference platform 6 and screwed, a disc type part 2 to be measured is placed on the cushion block 3, and a part reference plane 10 is enabled to face upwards. Dimension B in fig. 1 is the distance from the center of the upper surface of the initial groove to line 17, and dimension C in fig. 2 is the distance from the center of the upper surface of the initial groove to the rotational axis 5 of the disc element.

Starting a three-coordinate system, aligning a measuring head to the center of a mortise D1, sequentially measuring a part reference plane 10 and a positioning hole 12, establishing a coordinate system, measuring a mortise left working surface 7, a mortise right working surface 8 and a mortise bottom surface 9, synthesizing the mortise working surface 7 and the mortise working surface 8 into a bisection plane 13 (namely a mortise symmetrical central plane) of the two planes through optimal fitting, obtaining a plane 14 by offsetting the mortise bottom surface 9 through a dimension A, obtaining a coupling point K1 by intersecting the part reference plane 10, the bisection plane 13 and the plane 14, detecting a first angular hole 11 of a part, establishing a line 16 connecting a groove selection central point K1 and the part positioning hole 12 to obtain a line 17, and establishing an included angle epsilon between the line 16 and the line 17 by establishing the line 17 between the first angular hole 11 (first hole) central point and the part positioning hole 12; and measuring the first groove by the same method to obtain the central point of the first groove, and connecting the central point of the first groove with the straight line 18 of the central point of the part positioning hole 12 to obtain an included angle alpha between the straight line 18 and the straight line 17. The actual angle of the mortise is obtained through a formula 1, the included angle zeta between the adjacent mortises of the mortise is obtained through a formula 2, the actual offset mortise number is obtained through a formula 3, the actual offset angle eta of the mth mortise is obtained through a formula 4, the coordinate system is offset to the actual position of the mth mortise through the offset angle eta (the positive value and the negative value of eta offset are taken as the method that when the mortise D1 is on the left side of the angular positioning hole 11 when viewed from the M direction, the angle eta takes a negative value, otherwise, the angle eta takes a positive value), the value of the point K1 is projected onto the Z axis from the X positive direction according to the right-hand Cartesian coordinate system, the dimension is visually seen, the actual value of the dimension C, B is directly displayed, and the required technical condition actual value is calculated through a formula 5.

Equation 1 θ ═ ε ± α

Note: when the mortise D1 is located on the left side of the angular positioning hole 11, the angle α takes a positive value when viewed from the direction M, and otherwise takes a negative value.

Equation 2 ζ is 360 °/n

Wherein n is the total number of the mortises

Formula 3m ═ θ/ζ

Where M is the actual number of slots offset by the part angle location hole 15 and is taken as an integer (when viewed from M, slot D1 is rounded down on the left side of the angle location hole 11 and rounded up on the right side)

Formula 4 η ═ M ζ ═ ζ

Where eta is the actual angle of deviation of the groove from the line 17

Equation 5

Where P is the specified measurement range.

TABLE 1 advantages or Positive effects of the techniques

	Detecting a position	Number of detected values/number	Detection time/H
				Prior Art	First groove	2	0.5
The present invention	Random mortise	3	0.3