Transactions of Materials and Heat Treatment

Title：Influence of extrusion process parameters on mechanical behavior of die based on HyperXtrude

Authors： Liu Guoyong Hao Pengpeng Wan Li

Unit： School of Mechanical Engineering University of Science and Technology Beijing Xi′an Aerospace Precision Electromechanical Research Institute Guangdong Fenglv Aluminum Co. Ltd.

KeyWords： 7004 aluminum alloy extrusion die extrusion process parameters mechanical behavior maximum equivalent stress

ClassificationCode：TB124

year,vol(issue):pagenumber：2022,47(11):179-186

Abstract：

For 7004 aluminum alloy hollow profile, the geometric model of shunt combined die was established by 3D modeling software UG according to the initial design scheme, and the extrusion process of aluminum profile was numerically simulated by the HyperXtrude virtual test software based on ALE algorithm. Then, the mechanical behavior of extrusion die was analyzed, and the accuracy of the simulation results was verified by experiments. Furthermore, for extrusion speed, bar heating temperature, extrusion cylinder preheating temperature and die preheating temperature, the influences of the each extrusion process parameter on the mechanical behavior of die were explored, so as to achieve the purpose of reducing the force of die and improving the life of die. The results show that with the increasing of extrusion speed, the decreasing of bar heating temperature and the decreasing of extrusion cylinder preheating temperature, the maximum equivalent stress of die gradually increases, and the die preheating temperature has little effect on the maximum equivalent stress of die. Finally, under the improved combination of extrusion process parameters, the maximum equivalent stress of upper die is 998.4 MPa, and the maximum equivalent stress of lower die is 582.7 MPa, which are both lower than the yield strength of H13 die steel. In addition, the rationality of the improved extrusion process parameters are proved by extrusion experiments, which can provide a reference for the extrusion of the same type of aluminum profile.

Funds：

广东省重点领域研发计划项目(2020B010186002)

作者简介：刘国勇（1969-），男，博士，副教授，E-mail：gy_liu666@ustb.edu.cn

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