Transactions of Materials and Heat Treatment

Title：Wear analysis and process parameter optimization on hexagon punch based on orthogonal test

Authors： Mo Jie1 Liu Jian1 Li Xuan1 Zheng Qiong′e2

Unit： 1.HNU College of Mechanical and Vehicle Engineering 2.Shenzhen Aero-fasteners Mfg. Co. Ltd.

KeyWords： cold upsetting Archard wear theory hexagon punch mold wear cone angle punch hardness feeding speed

ClassificationCode：TG375

year,vol(issue):pagenumber：2022,47(9):1-6

Abstract：

In order to reduce the wear amount of the cold upsetting punch at the head of hexagonal bolt for a vehicle, the Archard wear theory was used to research it. Then, taking reducing the punch wear amount as the main objective and selecting cone angle of punch, punch hardness, friction factor and feeding speed as the test factors, L16(44) orthogonal test was designed, and finite element simulation was performed by DEFROM. Furthermore, the influence degree order of each factor on the punch wear was obtained by the range analysis and variance analysis of the test results,that is cone angle of punch>punch hardness>friction factor>feeding speed, and the optimal process parameter combination was the punch cone angle of 25°, the punch hardness of 67 HRC, the friction factor of 0.10, and the feeding speed of 100 mm·s-1. Under the optimal parameter combination, the wear amount of punch was reduced from 3.39×10-6 mm to 2.16×10-6 mm. The results show that the punch wear mainly occurs at the connection between conical surface of punch and ligament of punch. Thus, the optimized process parameters reduce the wear amount of punch, which has reference significance for the research on the wear of the same type of punch.

Funds：

国家自然科学基金创新研究群体基金资助项目(51621004)

莫杰(1996-)，男，硕士研究生 E-mail：mojie@hnu.edu.cn 通信作者：刘坚(1975-)，男，博士，教授，博士师导师 E-mail：liujian0108@vip.163.com

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