（１）组合冲模与专用冲模的互补性应用我厂在生产大批量脚踏板结合件（图ａ）时，设计制造二付冲模（其中一付备用），一次冲压可完成七个缺口，模具上的７个冲头可随时更换，但实际生产中效果不好，主要原因是冲头更换太频繁，造成不协调、错位。为此，我们设计了一付简... (1) Complementary Application of Combination Die and Dedicated Die The design and manufacture of two pairs of die (one of them is for backup) are made by our factory when manufacturing large quantities of pedal combination (Fig. A). Seven punches can be completed in one press. On the seven punch can be replaced at any time, but the actual production of ineffective, the main reason is too frequent punch replacement, resulting in uncoordinated, dislocation. To this end, we designed a pay ...