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在没有专用弯管设备的情况下,我们设计了钢管冷挤弯模,在300吨油压机土压制图1所示的弯管。钢管冷挤弯模的结构见图2,将坯料放进导套9中,然后油压机正向加压,滑块连同上模(包括上模板8、楔板5、凸模7)下行,楔板5先接触活动凹模块13,借助楔进作用使得活动凹模块在导向板12中向右滑动至工作位置。此后
In the absence of a dedicated elbow device, we designed a cold-forging die for steel pipe and pressed the elbows shown in Figure 1 on a 300-ton hydraulic press. The structure of the cold extrusion die is shown in Fig. 2, the blanks are placed in the guide sleeve 9, and then the hydraulic press is pressed forward. The sliders together with the upper die (including the upper die plate 8, the wedge plate 5 and the punch die 7) 5 first contacts the movable concave module 13, and the movable concave module slides rightward in the guide plate 12 to the working position by the wedging action. After that