Transactions of Materials and Heat Treatment

Title：Two-stage shaping method for cold extruded straight spur gear

Authors： Zhou Feng Feng Wenjie Li Dong Chen Yingying Zhao Qinlan

Unit： Chongqing University of Technology CISDI Engineering Co. Ltd.

KeyWords： cold extrusion cold shaping straight spur gear two-stage shaping tooth direction accuracy

ClassificationCode：TG376

year,vol(issue):pagenumber：2019,44(12):49-55

Abstract：

For the problem that the tooth direction accuracy is easy to be affected by the quality of gear end in the process of single stage cold shaping for cold extruded gears, the two-stage shaping process of cold extruded gears was put forward, and the influences of one-stage shaping amount, two-stage shaping amount, one-stage working belt length of die, two-stage working belt length of die, and mold spacing on the tooth direction accuracy of shaping were studied by elastoplastic finite element software. Numerical simulation results show that the tooth direction accuracy of the gear after shaping is stable at level 8 by adopting the two-stage shaping process and selecting the appropriate process parameters. Finally, according to the numerical simulation results, the two-stage shaping process of cold extruded gear was tested, and the tooth direction accuracy of the shaping gear was measured. The results show that the two-stage shaping process improves the tooth direction accuracy from level 10 to level 8 without the gear end face pre-treatment, and the test results are consistent with the simulation results.

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)

周凤 (1994－)，女，硕士研究生 E-mail：1129471156@qq.com 通讯作者: 冯文杰(1964－)，男，硕士，教授 E-mail: wjfeng@cqut.edu.cn

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