A Finite Element Analysis for the Initial Blank’s Shape Design of Sheet Metal in Deep Drawing Process

Abstract

In the deep drawing of cups, the earing defect is caused primarily by planar anisotropy in the sheet. In order to obtain the optimal products in deep drawing process, blank shape is a very important formability factor. In this study, the finite element method was used to investigate the cup height and forming force of the cylindrical cup drawing process. A finite element analysis was also utilized to acquire the designed profile of the drawn products, a reverse forming method for obtaining the initial blank’s shape according to the forward cylindrical cup drawing simulation is proposed. The design of initial blank’s shape is also confirmed to obtain the designed profile of drawn cups. The influences of the blank’s shape on the height of product, the forming force, the effective stress and the effective strain were also examined.