1　零件技术分析图 1所示磁分路是电度表上的冲压件。零件的材料为纯铁ＤＴ4 ,由于其在表上的特殊特性 ,该件的设计特点是压窝 12 0°后 ,平面度要求高 ,底孔不能变形且尺寸精度高。该件原工艺采用单工序冲裁———压 12 0°锥窝分开加工 ,结果零件外形胀 ,尺寸超差大 ,卸料困 1 Part Technical Analysis Figure 1 shows the magnetic shunt circuit is the stamping parts. Parts of the material for the pure iron DT4, due to its special characteristics in the table, the design features of this piece after the nest 12 0 °, the flatness requirements, the bottom hole can not be deformed and high dimensional accuracy. The piece of the original process using a single process blanking --- pressure 12 0 ° cone separate processing, the results shape expansion parts, large size difference, discharge unpleasant