Transactions of Materials and Heat Treatment

Title：Forming laws of T-shaped tube under incremental impact hydraulic loads

Authors： Zhao Xinniu1 Liu Jianwei1 2 Zhang Wenxiu1 Meng Zhenpeng1

Unit： 1.School of Mechanical and Electrical Engineering Guilin University of Electronic Technology 2.National Demonstration Center for Experimental Education of Mechanical and Electrical Engineering Training Guilin University of Electronic Technology

KeyWords： T-shaped tube incremental impact hydraulic bulging initial internal pressure feeding amount height of branch tube

ClassificationCode：TG394

year,vol(issue):pagenumber：2023,48(5):130-136

Abstract：

In order to further improve the formability of tube blank and improve the problem of traditional hydraulic bulging technology relying on high pressure source, a incremental impact hydraulic bulging method for multi-pass tube was proposed. For T2 red copper T-shaped tube, the experimental research on incremental impact hydraulic bulging was carried out by the designed bulging device, and by comparing the results of one-pass impact hydraulic bulging, two-pass and three-pass incremental impact hydraulic bulging under different hydraulic loads, the influences of initial internal pressure, feeding amount and incremental pass on the height, wall thickness distribution and top fillet radius of branch tube for T-shaped tube were analyzed. The research results show that this method can form T-shaped tubes with good quality. The initial internal pressure has a great influence on the top fillet radius and side wall fitting of branch tube for T-shaped tube. The forming quality of T-shaped tube is the best under the three-pass incremental impact hydraulic loads with the initial internal pressure for each pass of 10, 30 and 32 MPa and the feeding amounts of 3, 3 and 15 mm, respectively.

Funds：

国家自然科学基金资助项目(52265044);广西自然科学基金资助项目(2022GXNSFAA035586);广西高校中青年教师科研基础能力提升计划(2021KY0201)；桂林电子科技大学研究生教育创新计划项目(2023YCXS005)

作者简介：赵鑫牛（1997-），男，硕士研究生,E-mail：zhao_xinniu@163.com;通信作者：刘建伟（1978-），男，博士，教授,E-mail：liujianwei78988@163.com

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