Critical Conditions of Wrinkling in Deep Drawing of Sheet Metals : 1 st Report, Fundamentals of Analysis and Results in Case where a Blank-Holder is not Used

Abstract

In this work, examining actual phenomena of wrinkling in deep drawing operations, the mechanism of prevention of wrinkling are clarified. In addition, formulas are induced theoretically to predict the critical conditions of wrinkling in both cases where a blank-holder is not used and where a blank-holder is used. As the first report, fundamentals of analytical method and results in case where a blankholder is not used are reported.