Transactions of Materials and Heat Treatment

Title：Wear simulation and structural optimization on piercing punch for an automotive anti-loosening nut

Authors： Li Weiyang Long Yang Ji Linzhang

Unit： College of Mechanical Engineering Shanghai Institute of Technology

KeyWords： piercing process wear constitutive equation fracture model orthogonal test

ClassificationCode：TG316.1+5

year,vol(issue):pagenumber：2025,50(7):21-28

Abstract：

For the problem of rapid failure caused by excessive wear on the working surface of punch in the piercing process for an automotive anti-loosening nut, its wear analysis was conducted by finite element simulation. Firstly, the material flow stress data was obtained by tensile test, and the constitutive equation was established. At the same time, the piercing process model, material fracture model and punch wear model were established. Secondly, the influences of different types of punches on the wear were studied and compared, and Type IV punch was determined to be the best. Finally, in order to maximize the service life of Type IV punch, the piercing parameters and punch parameters were comprehensively considered, and the scheme design and optimization were completed by orthogonal test. The research results show that when the piercing speed is 20 mm·s-1, the piercing clearance is 0.10 mm, the front angle of punch is 35°, the end face diameter of punch is Φ3.0 mm, and the fillet radius of punch is R0.4 mm, the punch wear is minimized, and this result is verified by actual piercing tests. After optimization, the service life of each punch increases to 7386 pieces.

Funds：

上海应用技术大学重点毕业设计项目(1011LW250099-A22)

作者简介：李伟阳（1987-），男，硕士，助理实验师 E-mail：0CX32@aliyun.com 通信作者：纪林章（1981-），男，博士，高级实验师 E-mail：jlz81@163.com

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