标题：Structure optimization of porthole die based on aluminum profile extrusion process numerical simulation
作者：Wu Xiang-hong; Zhao Guo-qun; Luan Yi-guo; Lou Shu-mei; Ma Xin-wu
作者机构：Engineering Research Center for Die & Mould Technology, Shandong University, Ji\'nan 250061, China
会议名称：Beijing International Materials Week
会议日期：JUN 25-30, 2006
关键词：porthole die;optimization;numerical simulation;aluminum profile extrusion
摘要：Porthole die extrusion method is used to produce hollow aluminum profile. Due to the complexity of the porthole die structure and the material flow, it is very difficult to get ideal profile products with the firstly designed die structure. Finite volume numerical simulation was used to analyze the extrusion process of a hollow profile with porthole die and the problem of non-uniform material flow was found. Optimization was made to the originally designed die to solve the problem. Lower load, reasonable seaming location and even extruded forepart with uniform material flow in the optimized die extrusion were obtained. Guidelines to porthole die design were given and it is also concluded that finite volume method with Eulerian description avoids mesh regeneration and is suitable to numerical simulation of severe deformation processes, such as profile extrusion.