Transactions of Materials and Heat Treatment

Title：Electromagnetic sizing for aluminium alloy curved surface part by uniform pressure coils

Authors： Mei Long Liu Wei Zou Xifan Huang Shangyu

Unit： AVIC Aircraft Co. Ltd. Wuhan University of Technology

KeyWords： uniform pressure coil aluminium alloy electromagnetic sizing springback stress

ClassificationCode：TG391

year,vol(issue):pagenumber：2020,45(9):118-122

Abstract：

Springback is one of the inevitable problems in the forming process of aluminum alloy sheet, which directly affects the forming accuracy of aluminum alloy part. According to the shape characteristic of aluminum alloy curved surface part, its electromagnetic sizing was conducted by the uniform pressure coils with 3D conformal structure, and the evolution process of stress state and distribution uniformity for aluminum alloy curved surface part was analyzed by the whole process and multi-physics field coupling numerical simulation method to reveal the electromagnetic sizing mechanism of aluminum alloy curved surface part by uniform pressure coils. The results show that the stress distribution along the thickness direction of stamping curved surface part is not uniform with the outer layer under tensile stress and the inner layer under compressive stress, and the springback of part is serious after unloading. However, when the stamping pre-forming part is applied an over nearly uniform pulse magnetic pressure by the uniform pressure coils, the stress distribution of curved surface part is more uniform with the outer and inner layers under tensile stress. Thus, the springback of part is significantly decreased after unloading, and the forming accuracy of part is well improved.

Funds：

湖北省自然科学基金资助项目（2019CFB196）

梅龙（1987-），男，硕士，高级工程师 E-mail：meilong68@163.com 通讯作者：刘维（1986-），男，博士，讲师 E-mail：weiliu@whut.edu.cn

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