一般冲裁件的冲裁面大部呈断裂状态,断口粗糙, 只有剪断部分较为光洁,整个断面又呈锥形(图1)。因此,一般冲件如作为轴承或与其它零件配合要求断面光滑、平整而不带锥形时,必须再经加工,这样就限制了一般冲件的使用范围。根据苏联冷冲资料介绍,冲件在某些情况下,可以只经一次冲裁而使断面达到光滑平整的要求。这就叫做光洁冲裁。这 Most blanking parts of the blanking surface most of the fracture state, fracture rough, only the shear part is more smooth, the entire section was tapered (Figure 1). Therefore, the general red pieces such as bearings or with other parts with the requirements of smooth, smooth and without cone, you must then processed, thus limiting the scope of the general use of red pieces. According to the Soviet Union cold red description of information, red parts in some cases, can only be a blanking and make the cross section smooth and flat requirements. This is called smooth blanking. This