Transactions of Materials and Heat Treatment

Title：Development and application on multi-station cold upsetting extrusion process for automobile Huck rivet sleeve

Authors： You Fuyi1 Zhang Tieshan2 Zhu Qianqian1

Unit： 1.School of Transportation Jiangsu Lianyungang Vocational and Technical College of Industry and Trade 2.School of Mechanical Engineering Nanjing University of Science & Technology

KeyWords： Huck rivet sleeve cold upsetting extrusion load metall streamline mold structure

ClassificationCode：TG386

year,vol(issue):pagenumber：2022,47(12):31-37

Abstract：

Due to the characteristics of deep hole, thin wall and small size, the forming of automobile Huck rivet sleeve is difficult. The production mode of hot upsetting and cutting is often used, which has problems such as low efficiency and unstable quality. Therefore, the multi-station high-speed cold upsetting extrusion production mode was proposed. First of all, according to the principle of metal plastic forming, two sets of multi-station cold upsetting extrusion forming schemes were preliminarily formulated according to the structural characteristics of rivet sleeve, and the numerical simulation was carried out with the help of software Deform-3D to obtain the forming process of rivet sleeve,the maximum forming load and the metal streamline distribution of the two schemes. The results show that scheme 1 has forming defects, while scheme 2 has good forming without defects and less load. Secondly, the multi-station mold structure was designed according to the best scheme. Finally, the production verification was carried out, and the results were consistent with the simulation analysis results. Thus, the quality of rivet sleeve is good without defects, the size and performance could meet the actual needs, and the production efficiency is greatly improved, which realizes the upgrading of the Huck rivet sleeve process.

Funds：

江苏省职业教育教学改革研究课题（B/2020/10/120）

尤富仪（1987-），男，硕士，讲师 E-mail：youfy009@163.com

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