Transactions of Materials and Heat Treatment

Title：Simulation and parameter optimization on warm extrusion for automobile accumulator shell

Authors： Wu Guangbo

Unit： Teaching Department Shaanxi Vocational and Technical College

KeyWords： accumulator shell warm extrusion process optimization punch wear orthogonal test

ClassificationCode：TG376

year,vol(issue):pagenumber：2021,46(12):159-164

Abstract：

For the automobile accumulator shell, aiming at the problems of poor quality and deformation of cylinder wall in actual production, the process was optimized by finite element method and orthogonal test method. Firstly, the process of warm extrusion forming was analyzed, and the key process parameters affecting the quality of parts and mold life were determined. Secondly, taking the temperature difference between inside and outside of cylinder wall and punch wear as evaluation indexes, based on orthogonal experiment, each process parameter was simulated by Deform-3D, and the influence trends of process parameters on evaluation indexes were obtained. After comprehensive analysis, the optimal process parameters of warm extrusion were determined as the mold preheating temperature of 280 ℃, the punch extrusion speed of 45 mm·s-1, the punch cut in angle of 14°, and the diameter at punch end surface of Ф27.8 mm. Finally, according to the numerical simulation results, the actual warm extrusion production of accumulator shell was carried out, and the wall quality of the part was good without scratch and other defects to verify the reliability of the test results.

Funds：

兀光波（1983-），男，硕士，副教授，高级工程师 E-mail：sabrina1217@aliyun.com

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