一、引言 在单动冲床上,图1的零件一般有以下几种工艺方案: 方案(1)落料;(2)首次拉起延;(3)二次拉延; (4)外缘拉延(图 2a) 方案2(1)落料拉延复合模;(2)二次垃延; (3)外缘拉延(图2b) 案方3(1)落料、正、反拉延复合模; (2)二次拉延(图2c) 现将上述三种方案比较如下: 方案1.模具结构简单,冲床吨位小,生产率低,适宜于批量不大的生产。 I. INTRODUCTION In the single-action punch press, the parts of Fig. 1 generally have the following technological schemes: Scheme (1) blanking; (2) first drawing extension; (3) second drawing; (Figure 2a) Option 2 (1) blanking and drawing compound die; (2) secondary refuse extension; (3) outer edge drawing (Figure 2b) Case 3 (1) blanking, Composite mold; (2) the second drawing (Figure 2c) Now the above three programs are as follows: Scenario 1. Die structure is simple, small punch tonnage, low productivity, suitable for batch production.