厚壁管双向扩口镦粗成形工艺及模具

文中介绍了一种用于厚壁管双向扩口镦粗成形的工艺及模具。它由两道工序完成 ,即先将管坯两端同时扩口 ,再将两端台阶同时镦粗成形。模具结构采用了带外锥的分瓣式凹模及带内锥的浮动凹模套 ,解决了工件上、下两台阶同时扩口或镦粗成形及卸料问题 ,并提高了零件的尺寸精度和同轴度

The Process and Die Design for the Bidirectional Hole Expanding Upsetting Process of Thick-wall Tube

This paper introduced a process of the bidirectional hole expanding upsetting process of thick wall tube and its die design.It consists of two stages of forming processes.The first one is to expand the both ends of tube at the same time.The second is to upset the two ends of tube at the same time.The die construction employs the inner cone.The die design solves the problems of expanding or upsetting in both ends of the parts at the same time and striping.The dimensional accuracy and coaxiality of the parts are improved.