Taking the redrawing of cylindrical parts as an example,based on principal stress method and sheet bending theory,an analyt-ical model for predicting the redrawing limit drawing ratio of cylindrical parts was established considering the influence of hardening histo-ry,wall thickness ratio tmin/tmax,radius of die fillet and friction factor,and the redrawing tests of SUS304 stainless steel plate were carried out.The results show that the predicted values of the analytical model are in good agreement with the experimental results.The difference of redrawing limit drawing ratio between the analytical model considering the hardening history and the model without considering the hard-ening history is about 10％.Process parameters such as friction factor and radius of die fillet have significant influence on the redrawing limit drawing ratio.The larger the friction factor,the smaller the redrawing limit drawing ratio.The larger the radius of die fillet,the lar-ger the redrawing limit drawing ratio.
关键词
二次拉深/极限拉深比/主应力法/硬化历史/解析模型
Key words
redrawing/limit drawing ratio/main stress method/hardening history/analytical model
维普
万方数据