一、问题的提出“按扣”是汽车上用来固定车门窗口处密封条的零件,用65Mn钢带制作(见图1), 它是我厂生产中问题较多的零件之一。原工艺是用冲模在40吨压床上分两道工序生产。第一道工序采用连续模,第二道为单件压弯工序(见图2、图3)。第一道工序因产品结构尺寸小,弯曲部位多,使得工步数多达10个,冲模结构很复杂,给冲模维修、调整 First, the problem raised “Snap” is used to fix the door seal at the car parts, made of 65Mn steel (see Figure 1), it is one of the more problematic parts of our factory production. The original process is using die in 40 tons press in two processes. The first process using continuous mode, the second one for the single bending process (see Figure 2, Figure 3). The first process due to the product structure of small size, bending more parts, making the number of steps up to 10, the die structure is very complex, to the die repair and adjustment