在机械制造中,冲裁加工被广泛采用,但在加工中往往出现冲压塌角和冲裁面撕裂的问题,经实践,我们解决了这些问题,现介绍如下。图1为计时器的齿轮,其齿尖是R0.05mm的尖角,在齿尖处,不允许崩块、撕裂,齿面的粗糙度为Ra0.8μm。采用冲裁的加工方法效率高,但齿尖处应力集中易产生撕裂。凸模齿尖容易出现崩落,达不到零件质量的要求。为此,我们采用了下述加工方法:首 In the machinery manufacturing, blanking is widely used, but often appear in the processing of stamping collapses and punching the surface of the problem of tear, we have solved these problems, are presented below. Figure 1 is a timer gear, the tip is R0.05mm sharp corner, at the tip, does not allow collapse, tear, tooth surface roughness Ra0.8μm. Using blanking machining method of high efficiency, but the tooth tip of the stress concentration prone to tearing. Punch tooth tip prone to collapse, not meet the requirements of parts quality. To this end, we have adopted the following processing methods: first