1.对凸模的要求 (1) 有台肩的圆形凸模,压入部分应没有引导部分,引导部分可采用小圆角,小锥度,或在3毫米左右长度内将直径磨小0.03～0.05毫米; (2) 无台肩的成形凸模,压入端(为非刃口端)四周应修成斜度或小圆角。 2.对固定板要求 (1) 型孔的过盈量、光洁度应符合要求; (2) 型孔应与板的平面垂直; 1. The requirements of the punch (1) a shoulder circular punch, press the part should be no guide part, the guide part can be a small round, small taper, or in the length of about 3 millimeter diameter mill 0.03 ~ 0.05mm; (2) without shoulder forming punch, pressed into the end (non-edge end) should be made around the slope or small fillet. 2. Fixed plate requirements (1) type of hole interference, the finish should meet the requirements; (2) hole should be perpendicular to the plane of the plate;