Transactions of Materials and Heat Treatment

Title：Numerical simulation and experimental investigation on forming process for aluminum alloy cover with curved oblique flange

Authors： Cui Li Wu Yongkun Fan Binbin Du Jianning Zhang Yanfeng Zhang Jianmin Zhang Chun Lang Lihui

Unit： Shenyang Aircraft Industry (Group) Co. Ltd. Beihang University Tianjin Tianduan Aviation Technology Co. Ltd.

KeyWords： cover aluminum alloy sheet hydroforming cavity pressure numerical simulation

ClassificationCode：TG394

year,vol(issue):pagenumber：2017,42(7):77-83

Abstract：

The multi-step forming process combining preforming of rigid mould deep drawing, new quenching and final forming of hydrodynamic deep drawing for the aluminum alloy cover was studied. Firstly, geometric features of parts were analyzed, and the geometry shape of preformed intermediate configuration and the reasonable stamping direction were determined. The forming process was simulated and analyzed, and the key process parameters were optimized based on the finite element analysis software Dynaform. Meanwhile, the results of numerical simulation were optimized and verified by experiment. The results show that the cavity pressure and loading paths have great influence on the quality of part. The maximum cavity pressure required for the forming process is 15 MPa and the maximum thinning rate of part wall thickness is 11.424% after the final forming of hydrodynamic deep drawing. There is no obvious wrinkling tendency in the side wall and flange. For the aluminum alloy cover, the multi-step forming process combining preforming of rigid mould deep drawing, new quenching and final forming of hydrodynamic deep drawing has obvious advantages compared with the traditional multi-step drawing process, and the qualified parts with good surface quality can be obtained.

Funds：

作者简介：崔丽（1982-），女，博士，工程师，E-mail：cuilitianda@163.com；通讯作者：张建民（1987-），男，硕士，工程师，E-mail：amoijianmin@163.com

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