图1所示零件,材料为A_3。我厂原来的生产工艺是剪切条料→冲孔落料→预弯→卷圆→锪90°沉孔。现在我们改为压沉孔、冲孔与冲缺口、落料并预弯、卷圆都在一套模具上完成。与原工艺比较具有:1.减少预弯、卷圆、锪孔工序,提高了工效;2.省去了两 Parts shown in Figure 1, the material is A_3. I plant the original production process is cutting strip → punching blanking → Pre-bending → round → 锪 90 ° countersunk. Now we are instead pressing the hole, punching and punching, blanking and pre-bending, rolling round in a set of molds to complete. Compared with the original process has: 1. Reduce pre-bending, rolling round, countersink process, improve the work efficiency; 2. Save the two