Velocity Field and Variation of Wall Thickness During Tube Dieless Upsetting  

作　　者：王忠堂 栾瑰馥 张士宏 

机构地区：[1]Dept. of Materials Science & Engineering, Shenyang Institute of Technologgy. Shenyang 110168, China [2]Dept. of Metal Forming, Northeastern University, Shenyang 110006, China [3]Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, Chinaheoretical analyses show that the variation of wall thickness is in direct proportion to outer-diameter, inter-diameter, and (1+R_s)~(1/2) (Rs is sectional increase ratio of tube), the theoretical calculated results of wall thickness during tube dieless upsetting are very approximate to the experimental one. As the width of deformation field increases, both the variation of wall thickness and the derivative of wall thickness variation to width of deformation field (to/tf) reduce.

出　　处：《Journal of Harbin Institute of Technology(New Series)》2004年第2期218-222,共5页哈尔滨工业大学学报（英文版）

基　　金：Sponsored by Ministry of Education of China and Natural Science Foundation of Liaoning Province

摘　　要：Theoretical analyses show that the variation of wall thickness is in direct proportion to outer-diameter, inter-diameter, and (1+R_s)^(1/2) (Rs is sectional increase ratio of tube), the theoretical calculated results of wall thickness during tube dieless upsetting are very approximate to the experimental one. As the width of deformation field increases, both the variation of wall thickness and the derivative of wall thickness variation to width of deformation field (to/tf) reduce.Theoretical analyses show that the variation of wall thickness is in direct proportion to outer-diameter, inter-diameter, and (√1 + Rs) (Rs is sectional increase ratio of tube), the theoretical calculated results of wall thickness during tube dieless upsetting are very approximate to the experimental one. As the width of deformation field increases, both the variation of wall thickness and the derivative of wall thickness variation to width of deformation field (tf/to) reduce.

关 键 词：dieless upsetting TUBE wall thickness velocity field 

分 类 号：TG316[金属学及工艺—金属压力加工] TH165[机械工程—机械制造及自动化]