The Prediction of Earing and the Design of Initial Shape of Blank in Cylindrical Cup Drawing
The parameters such as aniotropic property, blank holder force and friction coefficient between tool and blank are not only effect on the forming force, stress and strain distribution of the worpiece, but also on the earing in products. In this paper, the finite element method is used to investigate the earing of the deep drawing process. In order to verify the prediction of FEM simulation of the earing in the cylindrical cup drawing process, the experimental data are compared with the results of the current simulation. A finite element analysis is also utilized to reduce the earing profile of the drawn products, a reverse forming method for obtaining the initial blank’s shape according to the forward cup deep drawing simulation is proposed.
Chengyu Jiang, Geng Liu, Dinghua Zhang and Xipeng Xu
T. S. Yang and Y. C. Hsu, "The Prediction of Earing and the Design of Initial Shape of Blank in Cylindrical Cup Drawing", Materials Science Forum, Vols. 532-533, pp. 865-868, 2006