Design method for developing compensation on sheet metal part
A technology of sheet metal parts and design methods, which is applied in the field of sheet metal, and can solve the problems of small parts, inaccurateness, and poor quality of manual blanking, etc.
Active Publication Date: 2015-12-16
SHENYANG AIRCRAFT CORP
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Problems solved by technology
[0003] In the process of processing sheet metal parts with secondary flanges on concave flanges, the disadvantages of the above method are: 1. The workers use experience to increase the blanking size, which is not accurate enough and cannot completely avoid the occurrence of small parts; 2. The quality of manual blanking is poor and the efficiency is low, which is not conducive to mass production
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[0020] a kind of like figure 1 The design method for unfolding compensation of sheet metal parts shown includes the following steps:
[0021] 1) Make the shape of the sheet metal part composed of line segments L1, L4, L5 and curve segment L6, where the curve segment L6 is the intersection line of the first bending shape of the part, such as figure 2 shown;
[0022] 2) if image 3 As shown, set the dimension of the first flange expansion as h1, translate the curve segment L6 to the outside by h1, obtain the curve segment L7, and connect the end points a, b, c and d of the curve segment L6 and L7 to form a closed area;
[0023] 3) Find a point k on the line segment ab, and ensure that the length of the line segment ak is the actual distance between the part edge line and the first shape intersection line, and at the same time, ak is also the second bending edge shape intersection line;
[0024] 4) Set the expanded dimension of the second flange as h2, and translate the line ...
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The invention relates to a design method for developing compensation on a sheet metal part. The method comprises the following steps: (1) making the outline of the sheet metal part; (2) setting a first flange developed dimension to be h1, and translating a curve segment L6 h1 towards the outer side; (3) looking for a point k on a line segment ab, and ensuring that the length of a line segment ak is equal to the actual distance between a part edge line and a first outline intersection line; (4) translating a line segment kb h2 towards the outer side to obtain a line segment L8; (5) obtaining a theoretical developed data set of the part; (6) counterclockwise rotating the line segment L2 gamma value through a point O to obtain a line segment L9; (7) looking for a point e on the line segment L9, drawing a vertical line of the L9 through the point e and intersecting with the lengthened line of the line segment bn on a point f, wherein the closed region is a developing compensation region; and (8) finishing the developed data set of added compensation of the final part. The method is simple and feasible; the work efficiency is improved; and the risk of relatively small manual blanking is reduced.
Description
technical field [0001] The invention relates to a design method for unfolding compensation of a sheet metal part, which belongs to the field of sheet metal. Background technique [0002] At this stage, there are two ways to design the two-dimensional unfolded data set of sheet metal parts. One is to make the unfolded line by manually calculating the unfolded dimension of the sheet metal flange on the basis of the outline of the part, so as to obtain the two-dimensional unfolded data The other is to use the sheet metal design software to automatically calculate the expansion size through the computer, and then obtain the two-dimensional expansion data set. With the development of digitization, the latter design method is generally adopted. In the process of processing sheet metal parts with secondary flanges on concave flanges, some sheet metal parts are affected by local material collection during the forming process, resulting in the local dimensions of the parts processed...
Claims
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IPC IPC(8): G06F17/50
Inventor 张云鹏时贵雨安冬梅
Owner SHENYANG AIRCRAFT CORP