Transactions of Materials and Heat Treatment

Title：Hydro-forging correction process on thin-walled extrusion part with multi-cavity

Authors： Sun Lei Lin Caiyuan Guo Xiaolin Chu Guannan

Unit： Harbin Institute of Technology(Weihai) Harbin Institute of Technology-Weihai Innovation Park Co. Ltd. Beijing Hangxing Machinery Manufacturing Co. Ltd.

KeyWords： thin-walled extrusion part with multi-cavity hydro-forging shape accuracy correction aluminum alloy

ClassificationCode：TG39

year,vol(issue):pagenumber：2021,46(4):50-55

Abstract：

To reduce or even eliminate the deformation of thin-walled extrusion part with multi-cavity after hot forming process, a new hydro-forging correction process was proposed, and the core idea was that the stress distribution of part was changed by axial compression deformation under the supporting of internal pressure to improve the shape accuracy. For 6005-T6 aluminum alloy thin-walled extrusion part with multi-cavity, the experiments and finite element simulation of hydro-forging correction process were conducted to verify its feasibility. The results show that the deformation of part after hot forming is significantly decreased, and the shape accuracy is improved by the hydro-forging correction process. When the internal pressure of 10 MPa and the compression amount of 12 mm are used, the shape of part obtained by the hydro-forging correction process is consistent with the desired shape. Furthermore, the results of displacement distribution before and after unloading show that the change of displacement distribution is little after compression deformation of part, indicating that the springback of part after unloading is small and meets the design requirements.

Funds：

国家基金委航天联合基金重点项目(U1937205)；国家自然基金面上项目 (51475121)；山东省重大科技创新工程（2019TSLH0103）

孙磊 (1989-)，男，博士，助理研究员 E-mail：szhhit@163.com 通讯作者：初冠南 (1979-)，男，博士，教授 E-mail：chuguannan@hit.edu.cn

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