Transactions of Materials and Heat Treatment

Title：Extrusion process on 20MnCr5 steel thin-walled shell based on numerical simulation

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ClassificationCode：TG376.3

year,vol(issue):pagenumber：2023,48(9):89-97

Abstract：

For a complex thin-walled shell, in order to solve the problem of large amount of material removal and serious waste in cutting production and realize the near net forming, a new process scheme of multi-station extrusion combined with a small amount of cutting was proposed, and the material utilization rate increased from 35.49% to 90.54%. Then, the blank-making processes of three different cold extrusion schemes were numerically simulated by software Deform-3D, and the filling effect of parts, streamline state, extrusion force and equivalent stress were compared in an all-round way. The results show that when the scheme 1 is adopted, not only the defects are effectively controlled, but also the forming quality of parts at each station is better, the filling is full, and the maximum extrusion force is also smaller. Finally, the on-site extrusion test was carried out, and the test results are consistent with the simulation test results. All the thin-walled shells are fully filled, the formed appearance is good without defects such as scratches and cracks, and the dimensional test results are within the required range.

Funds：

江苏省高校自然科学研究项目（19KJB430025）

作者简介：汪勇（1986-），男，硕士，高级实验师 E-mail：hiwangyong@126.com

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