Transactions of Materials and Heat Treatment

Title：Study on influence of extrusion force during split extrusion process for thin-walled rectangular tube aluminum profile

Authors： Chen Fei1 Wei Ke1 Dang Li2 Li Pingsheng1 Ye Hei1

Unit： 1.School of Aeronautical Manufacturing Engineering Nanchang Hangkong University 2.School of Aeronautical Engineering Zhengzhou University of Aeronautics

KeyWords： thin-walled rectangular tube 6063 aluminum alloy split extrusion extrusion force principal stress method

ClassificationCode：TG316

year,vol(issue):pagenumber：2023,48(12):129-137

Abstract：

For 6063 aluminum alloy thin-walled rectangular tube, firstly, the changing rules and causes of material flow and extrusion force during the forming process were analyzed by simulation software Deform-3D, and secondly, based on orthogonal test, the influences and significance of different process parameters on the extrusion force were investigated. The results show that in the early state of extrusion, the material is in a state upsetting and filling, and the extrusion force increases significantly. The material is welded after entering the welding chamber through the shunt hole, and the shunt metal contacts the bottom of welding chamber and continues to gather and move laterally in the welding chamber, which causes the extrusion force to increase sharply. The extrusion force decreases with the increasing of billet temperature and mold temperature, and increases with the increasing of extrusion speed. Finally, based on the preferred factors and levels, the lower extrusion force is obtained by the simulation. This value is compared with the theoretical maximum extrusion force obtained based on the principal stress method, and the error between the simulation and theoretical values is 5.6%. Thus, the research results provides the basis for realizing labor-saving forming of porous split extrusion for aluminum profile and improving the life of mold.

Funds：

国家自然科学基金资助项目（52005241）；中国国家留学基金委资助项目（NO.202208360107）；南昌航空大学2021年校级教改课题（JY21028）；江西省自然科学基金资助项目（20232BAB204050）

作者简介：陈飞（1996-），男，硕士研究生 E-mail：1101682809@qq.com 通信作者：魏科（1986-），男，博士，副教授 E-mail：weike@nchu.edu.cn

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