Transactions of Materials and Heat Treatment

Title：Research progress on hydro-mechanical forming technology for tube

Authors： Xu Yong Xia Liangliang Li Ming Zhang Shihong

Unit： Institute of Metal Research Chinese Academy of Sciences University of Science and Technology of China

KeyWords： tube forming hydro-mechanical forming large expansion ratio large cross-section change ratio multi-directional loading

ClassificationCode：TG394

year,vol(issue):pagenumber：2021,46(4):29-35

Abstract：

For the tubes with complex structural features such as large expansion ratio and large cross-sectional change ratio in major national science and technology engineering fields such as aerospace, nuclear energy engineering and new energy automobiles, tube hydro-mechanical forming technology (THMF) was studied by combining hydroforming with mechanical force loading, and the THMF could be classified to axial loading, radial loading and multi-directional compound loading according to the differences of structural characteristics of parts and loading directions. Then, the research process of THMF was systematically explained and introduced in the aspect of development of tools and dies, FE simulation, optimization of loading paths and application in typical complex tubes, etc. The results show that by combining with the external mechanical force，THMF can reduce the internal liquid pressure in tube and equipment tonnage during forming, and realize the integral forming of complex tubes with a deformation amount of nearly 70%. Therefore, the formability and surface quality of parts are improved, and the application of hydroforming in precision forming of tube is further extended, which provides effective technical support for the development of high-performance metal complex tubes.

Funds：

国家自然科学基金资助项目（51875548）；四川省科技计划项目（2019YFSY0050）；沈阳市重大科技成果转化专项（20-203-5-30）

徐勇（1983-），男，博士，研究员 E-mail：yxu@imr.ac.cn 通讯作者：张士宏（1962-），男，博士，研究员 E-mail：shzhang@imr.ac.cn

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