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当要在薄圆片零件上,尤其是在直径较小的零件上冲制对称或不对称的孔时,往往由于孔距或孔边距太小而不能用一副复合模冲制。图1所示零件的冲裁工艺通常为: 落料冲中孔→(修中孔)→冲两孔(或一孔)。
When a symmetrical or asymmetrical hole is to be punched in a thin disk part, especially in a small diameter part, it is often impossible to punch with a composite die because the hole pitch or hole margin is too small. Blanking process shown in Figure 1 parts are usually: blanking Chong hole → (repair hole) → punch two holes (or a hole).