Transactions of Materials and Heat Treatment

Title：Design on changeable interference combined die of spur gear in cold extrusion

Authors： Feng Wenjie Ran Li Xia Zeyu Chen Yingying Fu Sentao

Unit： Chongqing University of Technology Chongqing Zhonglian Gear Transmission Co. Ltd.

KeyWords： spur gear cold extrusion combined die uniform interference changeable interference failure analysis

ClassificationCode：TG376

year,vol(issue):pagenumber：2017,42(2):104-109

Abstract：

For the fracture problem of cold extrusion combined die for spur gear of camion, the failure analysis of the uniform interference combined die was carried out by the finite element analysis software Deform-3D. Based on the failure causes of uniform interference combined die, the design method of changeable interference combined die was proposed, and the preload structure of changeable interference was obtained by changing the contact of the middle ring and inner ring. Therefore, the maximum tangential compressive stress appeared on the opening part of the die core under preload condition to offset the maximum tangential tensile stress appearing at the same place under work condition, and the stress distribution of die was improved. The die used in the process of actual production was in good condition without fracture, swap block and so on. The research results show that the design method of the changeable interference combined die can avoid the fracture of the combined die, and provides a good basis for the design of combined die.

Funds：

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

冯文杰（1964-），男，硕士，教授冉力（1991-），男，硕士研究生

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