Transactions of Materials and Heat Treatment

Title：Numerical simulation and mold optimization on extrusion process of aluminum alloy spiral surface

Authors： Liu Hougen Zhao Beibei Xia Feng

Unit： Central South University

KeyWords： aluminium alloy spiral profile hot extrusion finite element simulation mold optimization

ClassificationCode：TG376

year,vol(issue):pagenumber：2017,42(12):169-174

Abstract：

The extrusion process of aluminum alloy 6063 spiral profile was simulated by software Deform-3D based on the thermo-mechanical coupling, and the load time curve, strain field, stress field, velocity field and metal flow situation in the extrusion process were obtained. However, after the metal flowed out of working band, the stress and strain distribution of metal in the same cross section are uneven, and the springback movement occurres in internal metal of profile, which makes the spiral angle of the spiral surface smaller. For the above problems, the method of adding disassembly correction equipment at the back of working band of the mold was put forward to ensure the precision of spiral angle of the spiral surface for aluminum alloy. Finally, the feasibility of this method was verified by experiment. Thus, the spiral angle of the spiral surface is raised from 11.96° to 20.99° after mold optimization, and its accuracy is improved by 41%.

Funds：

高性能复杂制造国家重点实验室自主探索基金（zzyjkt2013)；湖南省科技厅重点研发计划（2015GK3006）

作者简介：刘厚根（1959-），男，硕士，副教授 E-mail：lhg.csu@126.com

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