我厂在开发新产品时,遇到了外径为φ21mm、内径为φ12mm、厚为0.8mm的A3钢圆形垫圈。该零件对尺寸精度、平面度和冲切面都有较高的要求,用普通冲裁难以达到,因此必须进行精冲。我们根据有关情报资料进行分析,精冲时,压力机在一次工作行程中要产生三个压力:压料—推件板压紧材料的压力;齿 I plant in the development of new products, encountered outside diameter φ21mm, diameter φ12mm, thickness of 0.8mm A3 steel circular washer. The parts on the dimensional accuracy, flatness and punching surface have higher requirements, with ordinary stamping difficult to achieve, it must be fine blanking. We analyze based on intelligence information, fine blanking, the press in a work trip to produce three pressures: pressure - the pressure pushed the pusher plate material; teeth