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| Investigation on Flanging Process of T–Shaped Tube With 6061 Aluminum Alloy Used in Aeronautical Field |
| CHEN Dayong 1, XU Yong 1, ZHANG Shihong 1, CHENG Ming 1, SONG Hongwu 1, DENG Quanshui 1, HUANG Xinyue 2, WANG Chengcheng 2 |
1. Shi-changxu Innovation Center for Advanced Materials, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China;
2. Shenyang Duoyuan Mechanical & Electrical Equipment Co., Ltd., Shenyang 110000, China |
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Abstract An efficient and low-cost forming method was explored and studied aiming at solving the problems of low efficiency and poor dimensional accuracy in traditional stamping and welding process for aluminum alloy T–shaped tube used in aeronautical field. The design of flanging process and die development of 6061 aluminum alloy T–tube were carried out by the combination of finite element simulation and experiment. The effects of three different structures of drawing heads, conical, concave conical and spherical on the forming are simulated, respectively. Meanwhile, the influence was explored for the variation of wall thickness thinning ratio of branch tube under different initial pre-hole conditions. With the help of electronic universal testing machine, the flanging force under different pre-hole conditions was accurately recorded and compared. The results show that the designed die can realize the efficient forming of 6061 aluminum alloy T–tube with branch height of 3mm, and the maximum wall thickness thinning ratio is about 33.6%.
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2022, 
