• CN:11-2187/TH
  • ISSN:0577-6686

›› 2005, Vol. 41 ›› Issue (7): 234-238.

• 论文 • 上一篇    

带有动芯轴的管料壁厚减薄缩口成形的理论解析

滕宏春;林桂霞;胡平   

  1. 吉林大学材料科学与工程学院;吉林大学汽车动态模拟国家重点实验室
  • 发布日期:2005-07-15

THEORETICAL ANALYSIS AND EXPERIMENT OF SINKING OF TUBE WITH A MOVING MANDREL

Teng Hongchun;Lin Guixia;Hu Ping   

  1. College of Material Science and Engineering, Jilin University State Key Laboratory of Automobile Dynamic Simulation, Jilin University
  • Published:2005-07-15

摘要: 薄壁管口径尺寸精度要求高,须采用带有芯轴的缩径成形制造,带有芯轴的管壁厚减薄推缩径成形的理论解析研究还极少。管件的有芯推挤缩口成形的主要缺陷是管壁失稳屈曲,管子承受轴向力的能力受到限制。准确地计算出缩径力的大小和改变成形参数以找到减小缩径力的途径是最重要的。建立有芯缩口新的动可容速度场,对固定芯和动芯的推挤缩径进行了上限解析,分析了成形参数影响,并以传动轴管为例进行了试验分析,理论与实际结果非常吻合。

关键词: 管壁减薄, 上限解析, 推缩, 芯轴

Abstract: Because of the requirement on the high precision of the thin-wall tube, and it is hard to meet the quality requirement by sinking without mandrel, so the the thin-wall tube of high precision must be manufactured by sinking with a mandrel. The process of sinking tube is forming by extruding. In the process, the main default is instability on the tube wall, and the extrusion force is limited. It is important to calculate the extrusion force accurately and to find a way to decrease the force in the scheme design. Firstly, the new kinematically admissible velocity fields is designed. An upper bound analytical method is proposed on the tube sinking with a stationary mandrel or with a moving one. At last, with the drive shaft tube of the car as the example, the parameters of the process are analyzed .

Key words: Lighten the wall thickness of the tube, Mandrel, Sinking, Upper bound method

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