概述我厂生产的透视用X光机的机头筒零件(图1),过去采用的生产工艺是分别加工筒壁与筒底再焊为一体,后改用双动拉伸压力机(JA45—100)整体拉伸。经计算,整体加工需要三次拉伸,我们结合该设备设计了三套拉伸模,经反复实践修正终于将该零件拉伸成形。其三次拉伸成形见图2。拉伸模的原始结构第一次拉伸模原始结构见图3。主要由凸模、凹模、压边圈、顶出器、上下模板等组成。试模结果:①压边圈压料力不均,制件一 Overview I plant the X-ray machine with a perspective of the machine head tube parts (Figure 1), the production process used in the past are processing the cylinder wall and the cylinder at the end of re-welding as a whole, after the switch to double-acting stretch press (JA45- 100) overall stretch. After calculation, the overall processing needs three tensile, we combined with the design of the device three sets of tensile modulus, after repeated practice and finally stretch the shape of the part. The third stretch forming shown in Figure 2. The original structure of the tensile mold The first tensile mold original structure shown in Figure 3. Mainly by the punch, die, blank holder, ejector, up and down templates and other components. Test results: ① blank holder pressure uneven, one piece