一般无凸缘筒形零件的拉深、切边多采用拉深切边复合成形。切边间隙取负间隙,即切边凸模直径大于拉伸凹模直径约0.003～0.008mm。这种切边形式称为挤切。其模具结构见图1。(末次拉深切边模)。 采用这种结构模具拉深切边结束后状态如图2。 从图2可见,压边圈与挤切凸模采用滑配合形式,压边圈与拉深凸模之间有一个零 In general, there is no part of the flange of the drawing, trimming more use of deep-drawn trimming compounding. Trimming gap to take a negative clearance, that trimming punch diameter greater than the diameter of the drawing die about 0.003 ~ 0.008mm. This trimming form is called squeezing. The mold structure shown in Figure 1. (Last deepened trimming die). Using this structure, die deep drawing after the end of the state shown in Figure 2. Can be seen from Figure 2, blank holder and squeeze punch with a sliding fit form, blank holder and draw punch between a zero