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我厂JS 7—A时间继电器基座盖零件(如图1)的冲制,一直采用先冲孔落料,后压印压弯两付模具完成。由于采用先冲孔落料,后压印压弯的冲制方法,尺寸26±0.1无法保证。两3.2腰形孔由于压弯拉力作用,向外侧位移达0.5MM～0.7MM左右。直接影响工件质量。最近,我们分析了该零件的尺寸、结构特点,因为该零件上部凸出部分长度尺寸14MM,宽度尺寸19MM,两圆角R3与下四形部分尺寸完全一致。因此完全可以采用无废边落料方法。另外,要保证压弯后26±0.1尺寸,就必须先进行压弯,后再落料。根据这一想法,我们改进了该零
I plant JS 7-A time relay base cover parts (Figure 1) of the stamping, has been using the first blanking blanking, after the imprint of the two sets of pressure to complete the mold. As a result of the first blanking blanking, post-imprint bending bending method, size 26 ± 0.1 can not be guaranteed. Two 3.2 waist-shaped hole due to the role of pressure bending, lateral displacement of 0.5MM ~ 0.7MM or so. Directly affect the quality of the workpiece. Recently, we analyzed the size of the parts, structural features, because the part of the upper part of the protruding length size 14MM, width size 19MM, the two rounded corners R3 and the size of the lower quadrilateral exactly the same size. Therefore, it is entirely possible to use non-waste edge blanking method. In addition, to ensure 26 ± 0.1 crimp after the size, you must first bend, then blanked. Based on this idea, we improved the zero