Elastic Buckling Analysis of Die Fins during Extrusion
In this study, elastic buckling criteria for die fins during extrusion of complex-shaped parts are analytically derived. In this analytical model, the fins of the extrusion die are regarded as cantilever beams with a narrow rectangular cross section. The load intensity acting on each fin is assumed to be distributed uniformly, which is quite similar to the actual distribution. The elastic critical load intensity of buckling is successfully obtained by solving simultaneously the moment equilibrium differential equations. A commercial finite element package “DEFORM 3D" is also employed to simulate the flow pattern of the billet inside the die in extrusion of a CPU heat sink. The stress distribution pattern on the fins of the extrusion die is discussed.
Wunyuh Jywe, Chieh-Li Chen, Kuang-Chao Fan, R.F. Fung, S.G. Hanson,Wen-Hsiang Hsieh, Chaug-Liang Hsu, You-Min Huang, Yunn-Lin Hwang, Gerd Jäger, Y.R. Jeng, Wenlung Li, Yunn-Shiuan Liao, Chien-Chang Lin, Zong-Ching Lin, Cheng-Kuo Sung and Ching-Huan Tzeng
Y. M. Hwang et al., "Elastic Buckling Analysis of Die Fins during Extrusion", Materials Science Forum, Vols. 505-507, pp. 1081-1086, 2006