Transactions of Materials and Heat Treatment

Title：Influence of upsetting process parameters on surface damage for torsion bar end in vehicle

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ClassificationCode：TG316

year,vol(issue):pagenumber：2020,45(4):14-20

Abstract：

For the upsetting of torsion bar end in vehicle, the process parameters such as initial forging temperature, forging methods and feeding speed of forging machine had a great influence on the surface quality of torsion bar end. Based on the finite element method, the finite element model of torsion bar and its end was established. By using Deform3D software, the torsion bar and its end were meshing and the boundary conditions were set up for the simulation of upsetting process. Considering the heat transfer model, the axial stress, the axial strain and the surface damage were explored under different initial forging temperatures and feeding speeds. The relevant rules of upsetting process applicable to the torsion bar end in vehicle were obtained. The results show that when the initial forging temperature is between 1150 and 1200 ℃ and the feeding speed of forging machine is 1 mm·s-1, the surface damage of torsion bar end in vehicle is minimal, and the workpiece performance is better.

Funds：

国家自然科学基金面上项目（51275489）

吕彩琴（1968-），女，博士，教授 E-mail：lvcaiqin@nuc.edu.cn

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