Transactions of Materials and Heat Treatment

Title：Research on punching process optimization and die wear for automobile Huck rivet sleeve based on orthogonal test

Authors： Zhu Qianqian Liu Chenfu You Fuyi

Unit： School of Transportation Jiangsu Lianyungang Vocational and Technical College of Industry and Trade School of Automobile and Transportation Tianjin University of Technology and Education

KeyWords： Huck rivet sleeve punch wear punching coating die life

ClassificationCode：TG386

year,vol(issue):pagenumber：2022,47(11):62-69

Abstract：

In order to solve the problem of serious wear for lower punch in the punching process of Huck rivet sleeve, the punching model of rivet sleeve, material fracture model and wear model were established based on simulation platform Deform-3D. Firstly, the key punching parameters and the size of lower punch were optimized by using the orthogonal test method to reduce the lower punch wear, and the optimization results were obtained as the upper die punching speed of 20 mm·s-1, the lower punch hardness of 65 HRC, the top angle of 10°, and the lower punch fillet radius of 0.6 mm. Secondly, the strengthening effects of TiN, TiCN and TiAlN coatings to lower punch were studied by introducing coating technology. The results show that the wear resistance of TiAlN coating is stronger. Finally, through continuous simulation, the life prediction model of lower punch was established, and the life of each lower punch after optimization was predicted, which was verified by the actual punching test. The results show that the seriously worn parts are consistent with the numerical simulation results, the actual life of each lower punch is very close to the prediction results, and the error is controlled within 5%, which verifies the correctness of the result. In addition, with TiAlN coating, the life of lower punch can be increased from 17388 pieces to 39405 pieces, which effectively solves the problem of short die life in punching process during the riveting sleeve forming.

Funds：

江苏省职业教育教学改革研究课题（ZYB100）

作者简介：朱倩倩（1986-），女，学士，讲师，E-mail：zhuqq3318@126.com

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