Transactions of Materials and Heat Treatment

Title：Optimization design on cold extrusion changeable interference combined mould for large module gear based on particle swarm optimization

Authors： Chen Yingying Feng Wenjie Kuang Zhiyun Li Dong

Unit： Chongqing University of Technology

KeyWords： large module cylindrical spur gear cold extrusion combined mould changeable interference particle swarm optimization

ClassificationCode：TG376

year,vol(issue):pagenumber：2017,42(8):122-128

Abstract：

For the crack problem of combined die in cold extrusion process of large module cylindrical spur gear, the design method of changeable interference combined mould was proposed. Then, the Kriging model with changeable interference combined mould structure parameters and integrated weighted score was established by design variables of the diameter ratio, the angle of inner wall of shrink ring and the interference coefficient and the optimization objective of reducing the equivalent stress of the inner wall of mould core, avoiding the circumferential tensile stress and plastic deformation of the inner and outer ring. The optimal process parameters with n2=1.55，n3=2.55,γ′=1.25°,β2=2.5‰,β3=2.4‰ in the variable space were found by the Kriging model combined with particle swam optimization. The research results show that the design method of the changeable interference combined mould can avoid the fracture of the combined mould and prolong the service life of mould.

Funds：

重庆市教委科学技术研究资助项目（KJ1400944）；重庆市科委资助项目（cstc2014yykfA60001）

陈莹莹（1979-），女，硕士，副教授

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