Transactions of Materials and Heat Treatment

Title：FE analysis and die structure optimization design on concave distortion of extrusion section for aluminum alloy hollow profile

Authors： Wang Zhenhu He Xin Li Luoxing

Unit： Hunan University

KeyWords： aluminum alloy hollow profile section distortion extrusion concave numerical simulation die structure

ClassificationCode：TG376

year,vol(issue):pagenumber：2017,42(11):73-78

Abstract：

Section distortion is a difficult problem encountered in the extrusion process of complex hollow profile, and the repeated die tryout and modification were required to get qualified products. For the concave distortion of a complex thin-walled hollow profile 6063 aluminum alloy, the metal flow behavior in different directions and the pressure distributions for different heights in welding chamber were obtained by FE method. Then, the causes for section collapse were analyzed, and the mold structure was optimized. The simulation results show that the flow speeds of material at different positions and directions are more uniform in the extrusion process of profile after adding a restrictive block, and the concave distortion in the extrusion profile is modified. The experiment results show that the maximun concave amount of the extruded profile is reduced to 0.15 mm by adopting the improved die structure, and it can meet the requirements of practical applications.

Funds：

国家自然科学基金资助项目（1664252，51475156）

作者简介：王震虎（1986-），男，博士研究生 E-mail：18216229991@163.com 通讯作者：李落星（1969-），男，博士，教授 E-mail: llxly2000@163.com

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