Transactions of Materials and Heat Treatment

Title：Wear analysis and parameter optimization in blanking forming for nut based on orthogonal experiment

Authors： Chen Ting

Unit： Hubei Communications Technical College

KeyWords： blanking cold heading die wear orthogonal experiment Archard wear theory

ClassificationCode：TG375

year,vol(issue):pagenumber：2020,45(3):141-145

Abstract：

Taking the blanking die of cold heading for vehicle-used nut as object, the wear of upper punch was simulated and analyzed by finite element analysis software DEFORM-3D based on Archard wear theory. The results shows that the wear of upper punch mainly occurs in cutting edge region with high loading in forming process. Therefore, in order to extend the life of die, the blanking gap, the blanking speed, the surface hardness of upper punch and the friction coefficient were selected as facters, and the orthogonal experiment was designed to reduce the wear of upper punch. Then, the results were analyzed by using range and variance. Finally, the sequence of influencing factors is blanking speed, blanking gap, surface hardness of punch, friction coefficient respectively. The optimal parameters were obtained as the blanking gap of 8%t, the blanking speed of 5 mm·s-1, the surface hardness of upper punch of 53 HRC, the friction coefficient of 0.14. Thus, the maximum wear depth of upper punch is reduce from 13.1×10-6 mm to 3.66×10-6 mm, and it is a good guidance for practical production in enterprises.

Funds：

校企联合项目（J2018-181）

陈庭(1981-)，男，硕士，讲师 E-mail：1677239928@qq.com

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