FEM Analysis of Effect of Die Angle on Tube Inversion Forming Process under Conical Die  

作　　者：Zhichao SUN He YANG 

机构地区：[1]College of Materials Science and Engineering, Northwestern Polytechnical University, Xi′an 710072, China College of Materials Science and Engineering, Northwestern Polytechnical University, Xi′an 710072, China

出　　处：《Journal of Materials Science & Technology》2003年第z1期234-236,共3页材料科学技术（英文版）

基　　金：The authors would like to thank the National Natural Science Foundation of China for Distinguished Young Scholar (No.50225518), NSFC (59775055) and Doctorate Foundation of Northwestern Polytechnical University for support to enable the perform ing of this research.

摘　　要：Tube inversion including free deformation under conical die is an advanced forming process for manufacturing complicated thin-walled parts with high strength/weight ratio, high efficiency, and good flexibility for size changing.However, the successful reality of forming process, the change of deforming mode and shape and size of part formedare mainly on the die angle. Based on the analysis of the forming process, the model of rigid-plastic FEM (finiteelement method) is established and a numerical simulation system is developed. The effect of die angle on the tubeinversion forming process is investigated with the code developed. The results of the effect of half die angle on shapeof free deformation zone and on deforming load are obtained. There is an optimal die angle (about 75 deg), whichmakes the forming load minimum.

关 键 词：Tube INVERSION under conical die  RIGID-PLASTIC FEM  DIE angle  Free DEFORMATION 

分 类 号：TG1[金属学及工艺—金属学]