The Size Effects on Process Design of Micro Deep Drawing  

作　　者：马宁 董湘怀 

机构地区：[1]Dept. of Plasticity Technology, Shanghai Jiaotong Univ.

出　　处：《Journal of Shanghai Jiaotong university(Science)》2007年第3期323-327,共5页上海交通大学学报（英文版）

基　　金：The National Natural Science Foundation of China (No50275059, 50005008)

摘　　要：This paper suggested to reformulate cylindrical deep drawing parameters with dimensionless form. A diagram, in which a feasible zone is drawn to bound both the maximal allowable tension and compression stress during the deep drawing process, was established. Since it is presented in a dimensionless form, it may be applied for both conventional and micro deep drawing. Cylindrical cup deep drawing was taken as an example to show the dimensionless process design method. In addition, the size effects should be taken into account. Two kinds of size effects on micro deep drawing were investigated, which can be explained by surface layer model and strain gradient model. Numerical simulations were carried out to compare the strain distribution with or without consideration of size effect.This paper suggested to reformulate cylindrical deep drawing parameters with dimensionless form. A di- agram, in which a feasible zone is drawn to bound both the maximal allowable tension and compression stress dur- ing the deep drawing process, was established. Since it is presented in a dimensionless form, it may be applied for both conventional and micro deep drawing. Cylindrical cup deep drawing was taken as an example to show the di- mensionless process design method. In addition, the size effects should be taken into account. Two kinds of size effects on micro deep drawing were investigated, which can be explained by surface layer model and strain gradient model. Numerical simulations were carried out to compare the strain distribution with or without consideration of size effect.

关 键 词：micro deep drawing size effect surface layer strain gradient 

分 类 号：TG386[金属学及工艺—金属压力加工]