Transactions of Materials and Heat Treatment

Title：An automatic cold upsetting process for automobile non-standard parts based on computer numerical analysis

Authors： Bai Shibing

Unit： IFLYTEK Big Data Department Chongqing City Vocational College

KeyWords： non-standard part automatic cold upsetting Deform-3D constitutive model equivalent stress load

ClassificationCode：TG386.3

year,vol(issue):pagenumber：2022,47(9):30-38

Abstract：

In order to change the current situation of multipre processes, low production efficiency and large differences of product performance in curvent production process for an automobile non-standard part, two kinds of automatic cold upsetting schemes were proposed, and the Johnson-Cook constitutive model of 10B21 steel was established by Deform-3D. Then, based on the model, the simulated forming of the parts in each station for the two schemes were conducted, and the deformation law, equivalent stress distribution and load situation of the material were analyzed. Furthermore, the process inspection and optimization were carried out, and the final forming scheme was determined, namely, blanking-diameter reducing and inner hole pre-forming-head pre-upsetting-flower head upsetting-head shaping-head final forming-punching, and the process test was completed. Production tests show that the finite element analysis results are accurate, the optimized cold upsetting process is reliable, and the mass production of the non-standard parts can be realized. The obtained parts have complete forming, good surface quality and no problems of scraping, folding, potholes and so on, and the dimensional accuracy meets the production requirements.

Funds：

重庆市教育委员会项目（193299）;重庆市级规划项目(2020-GX-397)

柏世兵（1983-），男，硕士，副教授 E-mail：bsb198309@163.com

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