Transactions of Materials and Heat Treatment

Title：Precision forming process and die technology on complex deep cylindrical aluminum alloy wheel hub forgings

Authors： Zhou Jie1 Li Shishan1 Zhang Qian1 Wu Daoxiang2 Dong Xugang3

Unit：

KeyWords：

ClassificationCode：TG319

year,vol(issue):pagenumber：2021,46(9):270-276

Abstract：

For the problems of difficulty in precision forming for complex deep cylindrical aluminum alloy aircraft wheel hub caused by the characteristics of high surface quality requirements, many non-machined surfaces and complex shapes, a forming process of initial-extrusion+pre-extrusion+final-extrusion was proposed. Then, the precision forming process of complex deep cylindrical wheel hub and mold structure were designed and optimized by numerical simulation software DEFORM and process tests, and the forming defects under actual production conditions were analyzed based on the process test results. The results show that the three-step forming process can form the forgings well, and the large difference between the actual boundary conditions in the process experiment and the ideal boundary conditions in the simulation is the main reason for the forming defects such as dissatisfaction and folding in the process experiments. Based on the numerical simulation and optimization analysis, the special structures and methods such as changing the positioning method of blank, upsetting and forming the rough flange and adding a barrel-shaped inner flash in the final-extrusion die are proposed to optimize the hub forming. Finally, the trial production of precision die forging for complex deep cylindrical aluminum alloy aircraft hub is successful.

Funds：

国家重点研发计划项目（2018YFB1106504）；大型复杂航空模锻件全流程绿色制造工艺创新及应用（2018272106）；重庆市研究生科研创新项目（CYB20004）

周杰（1965-），男，博士，教授 E-mail：zhoujie@cqu.edu.cn

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