Transactions of Materials and Heat Treatment

Title：Necking and thickening forming on ultrasonic vibration-electric pulse coupling for aluminum alloy thin-walled tube

Authors： Fan Yubin1 Xu Xuefeng1 Tao Ruichen1 Luo Ming2 Wei Liming1 Li Xiaodong1 Xiao Jie1 Zeng Xiang1

Unit： 1.School of Aviation Manufacturing Engineering Nanchang Hangkong University 2. Key Laboratory of High Performance Manufacturing for Aero Engine (Ministry of Industry and Information Technology) Northwestern Polytechnical University

KeyWords： ultrasonic vibration electric pulse thin-walled tube necking and thickening forming thickening rate

ClassificationCode：TG306

year,vol(issue):pagenumber：2024,49(8):53-58

Abstract：

In aircraft, the connection type of necked and thickened tube threads can improve the weight gain problem caused by traditional necked tie rod riveting, and the thickening rate of tube is a vital index of necking and thickening forming. Therefore, in order to increase the thickness of the necked and thickened tube, the necking and thickening forming method of ultrasonic vibration-electric pulse coupling was proposed. Firstly, the necking and thickening forming experiments with electric pulse coupling for 5A02 aluminum alloy thin-walled tubes were carried out. And it is found that increasing the current intensity is beneficial to increase the tube temperature, reduce the deformation resistance, avoid the buckling defect of tube as well as increase the tube thickness. Then, the necking and thickening forming experiments with ultrasonic vibration-electric pulse coupling for 5A02 aluminum alloy thin-walled tubes were carried out. The results show that the formed tubes with ultrasonic vibration begin to thicken earlier, and the average thickening rate of the thickened area and the difference of average thickening rate between the thickened and necked areas is greater after forming, which illustrates that the ultrasonic vibration-electric pulse coupling process is beneficial for thickening forming.

Funds：

国家科技重大专项（J2019-Ⅶ-0014-0154)；江西省自然科学基金资助项目（20224BAB214050）；航空发动机高性能制造工信部重点实验室开放课题资助项目（HPM-2020-01）

作者简介：范玉斌（1987-），男，博士，副教授 E-mail：yubin_fan@nchu.edu.cn 通信作者：徐雪峰（1983-），男，博士，教授 E-mail： xfwinzy@163.com

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