A Design Method for Expanding Compensation of Sheet Metal Parts

Abstract

The invention relates to a design method for unfolding compensation of a sheet metal part, comprising the following steps: 1) making the shape of the sheet metal part; 2) setting the unfolding dimension of the first bending edge as h1, and translating the curve segment L6 to the outside by h1; 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 edge line of the part and the first shape intersection line; 4) Translate the line segment kb to the outside by h2 to obtain the line segment L8; 5) Obtain the theoretical expansion data set of the part ;6) Passing point O, rotate line segment L2 counterclockwise by γ value to obtain line segment L9; 7) Find a point e on line segment L9, pass point e and make L9 vertical line intersect the extension line of line segment bn at point f, and close the area It is the expansion compensation area; 8) Complete the expansion data set of the final part to increase compensation. The method is not only simple and easy to implement, improves work efficiency, but also reduces the risk of manual blanking.

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...

AI Technical Summary

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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