阅读说明：本技术 一种提高船舶舭部肋板拼板精度的方法 (Method for improving precision of ship bilge rib plate splicing plate ) 是由 肖松 林品一 柳庆 王成 熊晖 于 2021-10-28 设计创作，主要内容包括：本发明公开了一种提高船舶舭部肋板拼板精度的方法,在舭部的肋板上均作成四处“十字MK线”画线数据,前后肋板上画线位置相同,以便于前后肋板打水平计测作为“十字MK线”的选择依据,从而组成矩形效果,矩形为肋板各边SLOT孔包裹范围内的最大矩形,矩形长边平行于舭部斜板,控制矩形对角尺寸,用以衡量基准线BL、WL的位置精度,并作适当调整,当对角差大于3mm时对基准线BL、WL的位置进行确认和再画线,确保拼板后肋板几何形状和基准线位置,提高后道工序分段制作精度,节省材料及人工成本,方便实用。(The invention discloses a method for improving the precision of a ship bilge rib plate jointed plate, wherein line drawing data of four cross MK lines are made on a rib plate of a bilge part, the line drawing positions of front and rear rib plates are the same, so that the front and rear rib plates can be used as a selection basis of the cross MK lines through level measurement, a rectangular effect is formed, the rectangle is the largest rectangle in the range of wrapping SLOT holes on each side of the rib plate, the long side of the rectangle is parallel to the bilge inclined plate, the diagonal size of the rectangle is controlled, the position precision of reference lines BL and WL is measured, the position of the reference lines BL and WL is properly adjusted, when the diagonal difference is larger than 3mm, the position of the reference lines BL and WL is confirmed and re-drawn, the geometric shape and the reference line position of the rib plate behind the jointed plate are ensured, the subsection manufacturing precision of the subsequent procedure is improved, the material and labor cost are saved, and the method is convenient and practical.)

1. The utility model provides a method for improve boats and ships bilge floor makeup precision, boats and ships bilge comprises bilge swash plate and a plurality of floor that are parallel to each other that set up on the bilge swash plate, and every floor center is equipped with the lightening hole, is equipped with a plurality of SLOT holes on each side of floor, its characterized in that: the method comprises the following steps:

step one, planning

According to the design size of the bilge rib plate, the bilge rib plate needing to be cut is planned on the steel plate base metal, and the bilge rib plate needing to be cut is divided into a plurality of parts on the principle of improving the utilization rate of steel;

step two, depicting a cross MK line "

After the planning is completed, 4 crossed MK lines are drawn on the position of a bilge rib plate needing to be cut on the steel plate, the 4 crossed MK lines are connected to form a rectangle, the long side of the rectangle is parallel to the bilge sloping plate, and the rectangle is maximized under the condition that the measuring operation is not influenced;

step three, cutting

Cutting the steel plate carved with the cross MK line in the step two according to the bilge rib plate planned in the step one, measuring the actual distances between the intersection point of the cross MK line and the horizontal and vertical straight lines between the reference line BL and the reference line WL, comparing the actual distances with theoretical values, combining the comparison results of the actual measured lengths of the reference line BL and the reference line WL with the theoretical values, slightly correcting the width of the steel plate, and controlling the cutting precision;

step four, rib plate welding

Splicing a plurality of parts of a rib plate at the bilge part, welding to form a plurality of welding seams on the welded rib plate, aligning reference lines BL and WL before welding, checking the actual horizontal and vertical straight line distances between the intersection point of the cross MK lines and the reference lines BL and WL, checking the actual lengths of the reference lines BL and WL, slightly correcting the widths, and then connecting 4 cross MK lines and snapping the lines to form a rectangle;

step five, detection after welding

Measuring the actual distance between the intersection point of the cross MK lines and the horizontal and vertical straight lines between the reference lines BL and WL again, comparing the actual distance with a theoretical value, calibrating the position of the cross MK lines by combining the comparison result of the actual measured length of the reference lines BL and WL and the theoretical value, then reconnecting 4 cross MK lines and snapping the lines to form a rectangle, measuring the position accuracy of the reference lines BL and WL by controlling the diagonal size of the rectangle, and confirming and re-drawing the positions of the reference lines BL and WL when the diagonal difference is larger than 3 mm.

2. The method for improving the accuracy of the gusset plate of the bilge of the ship according to claim 1, wherein the method comprises the following steps: in the second step, the cross MK line is arranged at the same side with the datum lines BL and WL, namely the cross MK line is arranged at the same side with the bone material assembled on the rib plate by default.

3. The method for improving the accuracy of the gusset plate of the bilge of the ship according to claim 1, wherein the method comprises the following steps: the reference lines BL and WL are the main measurement scale for the universal ship body construction.

4. The method for improving the accuracy of the gusset plate of the bilge of the ship according to claim 1, wherein the method comprises the following steps: the cross MK line and the datum lines BL and WL are measured simultaneously, the working hours of the subsequent working procedures are not additionally increased, and the subsequent processing cost is effectively reduced.

5. The method for improving the accuracy of the gusset plate of the bilge of the ship according to claim 1, wherein the method comprises the following steps: the crossed MK lines drawn by the plurality of mutually parallel ribbed plates are the same in position, when the ribbed plates are assembled, the ribbed plates are sequentially positioned on the inclined plates of the bilge part, the positions of the crossed MK lines on the adjacent ribbed plates are determined in a horizontal mode, so that the precision of the adjacent ribbed plates is ensured, and then welding is carried out.

6. The method for improving the accuracy of the gusset plate of the bilge of the ship according to claim 1, wherein the method comprises the following steps: when a plurality of ribs parallel to each other are slightly different in size or shape, the largest rectangle is drawn on the basis of the smallest or most critical rib, and the same rectangles are drawn at the same positions on the remaining ribs, so that the assembly accuracy is measured and controlled.

Technical Field

The invention relates to the technical field of ship manufacturing, in particular to a method for improving the accuracy of a ship bilge rib plate splicing plate.

Background

The rib plates of the bilge segments of the ships are usually provided with large lightening holes, and are assembled after being manufactured by an interior splicing plate group. The existing bilge rib plate HIVAS jointed plate only measures the jointed plate precision according to jointed plate seams, datum lines BL and WL, can only eliminate the geometric shape deviation deformation of partial NC cutting, steel plate transportation and HIVAS jointed plate stages, and precision measurement control data cannot be directly and effectively transmitted to the subsequent small group assembly and large component section manufacturing procedures, and the subsequent procedures can only spend a large amount of working hours to adjust the segmentation precision. The conventional method is time-consuming, and wastes a large amount of materials and labor cost.

Disclosure of Invention

The invention aims to solve the technical problem of the geometric shape offset deformation precision control of the ship bilge rib plate, and provides a method for improving the precision of a ship bilge rib plate splicing plate, so that the problem is solved.

In order to achieve the purpose, the technical scheme of the invention is realized as follows: the method for improving the accuracy of the ship bilge rib plate jointed plate comprises the steps that the ship bilge is composed of a bilge inclined plate and a plurality of mutually parallel rib plates arranged on the bilge inclined plate, a lightening hole is arranged in the center of each rib plate, and a plurality of SLOT holes are arranged on each edge of each rib plate, and comprises the following steps:

step one, planning

According to the design size of the bilge rib plate, the bilge rib plate needing to be cut is planned on the steel plate base metal, and the bilge rib plate needing to be cut is divided into a plurality of parts on the principle of improving the utilization rate of steel;

step two, depicting a cross MK line "

After the planning is completed, 4 crossed MK lines are drawn on the position of a bilge rib plate needing to be cut on the steel plate, the 4 crossed MK lines are connected to form a rectangle, the long side of the rectangle is parallel to the bilge sloping plate, and the rectangle is maximized under the condition that the measuring operation is not influenced;

step three, cutting

Cutting the steel plate carved with the cross MK line in the step two according to the bilge rib plate planned in the step one, measuring the actual distances between the intersection point of the cross MK line and the horizontal and vertical straight lines between the reference line BL and the reference line WL, comparing the actual distances with theoretical values, combining the comparison results of the actual measured lengths of the reference line BL and the reference line WL with the theoretical values, slightly correcting the width of the steel plate, and controlling the cutting precision;

step four, rib plate welding

Splicing a plurality of parts of a rib plate at the bilge part, welding to form a plurality of welding seams on the welded rib plate, aligning reference lines BL and WL before welding, checking the actual horizontal and vertical straight line distances between the intersection point of the cross MK lines and the reference lines BL and WL, checking the actual lengths of the reference lines BL and WL, slightly correcting the widths, and then connecting 4 cross MK lines and snapping the lines to form a rectangle;

step five, detection after welding

Measuring the actual distance between the intersection point of the cross MK lines and the horizontal and vertical straight lines between the reference lines BL and WL again, comparing the actual distance with a theoretical value, calibrating the position of the cross MK lines by combining the comparison result of the actual measured length of the reference lines BL and WL and the theoretical value, then reconnecting 4 cross MK lines and snapping the lines to form a rectangle, measuring the position accuracy of the reference lines BL and WL by controlling the diagonal size of the rectangle, and confirming and re-drawing the positions of the reference lines BL and WL when the diagonal difference is larger than 3 mm.

Furthermore, the cross MK lines drawn by the plurality of mutually parallel rib plates are the same in position, when the rib plates are assembled, the plurality of rib plates are sequentially positioned on the inclined plates of the bilge part, and the cross MK lines on the adjacent rib plates are determined in a horizontal mode so as to ensure the precision of the adjacent rib plates and then are welded.

Further, when a plurality of ribs parallel to each other are slightly different in size or shape, the largest rectangle is drawn on the basis of the smallest or most critical rib, and the remaining ribs draw the same rectangle at the same position, so as to measure and control the assembly accuracy.

Furthermore, in the second step, the cross MK line is arranged at the same side of the datum lines BL and WL, namely, the cross MK line is arranged at the same side of the assembly aggregate on the rib plate by default.

Furthermore, the reference lines BL and WL are the main measurement scale for the general ship body construction.

Furthermore, the cross MK line and the datum lines BL and WL are measured simultaneously, the working hours of the subsequent working procedures are not increased, and the subsequent processing cost is effectively reduced.

The method has the advantages that the method for improving the accuracy of the ship bilge rib plate splicing plate is provided,

(1) 4 crossed MK lines are introduced to be used as detection or positioning basis in the whole step, so that the splicing manufacturing precision is improved, and the cost is reduced; the integral precision of the bilge rib plate splicing plate is further improved;

(2) the rib plates of the bilge part are divided into three parts during cutting, so that stress deformation generated during cutting can be reduced, the problem that the whole rib plate is deformed during integral cutting, the cutting and subsequent processes are influenced is solved, and the quality of the bilge part of the ship is ensured;

(3) the method improves the subsection manufacturing precision of the subsequent process, saves materials and labor cost, and is convenient and practical.

Drawings

Fig. 1 is a schematic view of the rib of the bilge segment;

FIG. 2 is a schematic diagram of a cross MK line rectangle effect in a large component manufacturing state;

1. a cross MK line; 2. BL; 3. WL; 4. welding seams; 5. a bilge inclined plate; 6. a rib plate; 7. SLOT holes.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples.

As shown in fig. 1-2, a method for improving the accuracy of a ship bilge rib plate splice plate, wherein a ship bilge is composed of a bilge inclined plate 5 and a plurality of rib plates 6 which are arranged on the bilge inclined plate 5 and are parallel to each other, a lightening hole is arranged at the center of each rib plate 6, and a plurality of SLOT holes 7 are arranged on each edge of each rib plate 6, comprises the following steps:

step one, planning

According to the design size of the bilge rib plate 6, planning the bilge rib plate 6 to be cut on the steel plate parent metal, and dividing the bilge rib plate 6 to be cut into three parts on the principle of improving the utilization rate of steel;

step two, depicting a cross MK line 1

After the planning of the first step is finished, 4 crossed MK lines 1 are drawn on the position of a bilge rib plate 6, which is required to be cut, of the steel plate, the 4 crossed MK lines 1 are connected to form a rectangle, the long side of the rectangle is parallel to a bilge inclined plate 5, and the rectangle is maximized under the condition that the measuring operation is not influenced;

step three, cutting

Cutting the steel plate with the cross MK line 1 carved in the step two by using an NC cutting machine according to the position of the bilge rib plate 6 planned in the step one, measuring the actual distance between the intersection point of the cross MK line 1 and the horizontal and vertical straight lines BL2 and WL3, comparing the actual distance with a theoretical value, combining the comparison result of the actual measured length and the theoretical value of the reference lines BL2 and WL3, slightly correcting the width, and controlling the cutting precision;

step four, welding the rib plates 6

Splicing three parts of a rib plate 6 at the bilge part, welding to form three welding seams 4 on the welded rib plate 6, aligning reference lines BL2 and WL3 before welding, checking the actual horizontal and vertical straight line distances between the intersection point of a cross MK line 1 and the reference lines BL2 and WL3, checking the actual lengths of the reference lines BL2 and WL3, slightly correcting, and then connecting 4 cross MK lines 1 and snapping lines to form a rectangle;

step five, detection after welding

Measuring the actual distance between the intersection point of the cross MK line 1 and the reference lines BL2 and WL3 again, comparing the actual distance with a theoretical value, calibrating the position of the cross MK line 1 by combining the comparison result of the actual measured length of the reference lines BL2 and WL3 with the theoretical value, then reconnecting 4 cross MK lines 1 and snapping the lines to form a rectangle, measuring the position accuracy of the reference lines BL2 and WL3 by controlling the diagonal size of the rectangle, and confirming and re-drawing the positions of the reference lines BL2 and WL3 when the diagonal difference is larger than 3 mm.

Furthermore, the cross MK lines 1 drawn by the plurality of mutually parallel rib plates 6 are the same in position, when the rib plates 6 are assembled, the plurality of rib plates 6 are sequentially positioned on the bilge inclined plate 5, the cross MK lines 1 on the adjacent rib plates 6 are determined in a horizontal mode, so that the precision of the adjacent rib plates 6 is ensured, and then welding is carried out.

Further, when a plurality of ribs 6 parallel to each other are slightly different in size or shape, the largest rectangle is drawn on the basis of the smallest or most critical rib 6, and the remaining ribs 6 draw the same rectangle at the same position, so as to measure and control the assembly accuracy.

Furthermore, in the second step, "cross MK line" 1 is arranged at the same side of the reference lines BL2 and WL3, that is, the cross MK line is the same side as the bone material assembled on the rib plate 6 by default, so that the NC cutting machine can draw lines automatically and accurately.

In the example, the reference lines BL2 and WL3 are used as the universal main measurement scale for the ship body construction, and are the main basis for the measurement precision of the non-allowance construction, namely the ship body construction is performed from the ship body member processing procedure, the subsequent rib plate 6 welding, the bilge part assembling and finally the bilge part segment folding procedure, the ship body construction precision is ensured mainly by measuring the reference lines BL2 and WL3, and the universal main measurement scale for the ship body construction is considered to run through the whole ship body construction process.

In this example, the cross MK line 1 is measured simultaneously with the reference lines BL2 and WL3, which effectively reduces the subsequent cost without increasing the number of steps in the subsequent process.

The precision in the segmentation distance is controlled by controlling BL2 lines on the rib plates 6 of the same segment to be vertical and to be a line in front and back.

The accuracy of the distance between the segments and the base line is controlled by controlling the WL3 lines on the rib plates 6 of the same segment to be horizontal and a front line and a back line.

The welding seams 4 on the rib plates 6 in the same section are consistent in form, the plate edge allowance is set uniformly, and the geometric shape precision of the rib plates 6 is controlled.

While the foregoing is directed to embodiments and effects of the present invention, it will be appreciated by those skilled in the art that various changes and modifications may be made without departing from the principles of the invention, and it is intended that all such changes and modifications be considered as within the scope of the invention.