Transactions of Materials and Heat Treatment

Title：Influence of friction coefficient and blank wall thickness on roll extrusion quality of cylindrical parts

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ClassificationCode：TG312

year,vol(issue):pagenumber：2021,46(10):105-155

Abstract：

The roll extrusion process was numerically simulated by software Deform-3D, and the influences of different friction coefficients and blank wall thicknesses on the flash height of semi-finished product were analyzed to study the force conditions of mold during the forming process. The research results show that the flash height increases with the increasing of the friction coefficient and the blank wall thickness, and the radial load also increases with the increasing of the friction coefficient, but decreases with the increasing of the blank wall thickness. When the friction coefficient is 0.4 and the blank wall thickness is 17.0 mm, the maximum radial load of punch is 868 kN. Finally, the forming test was carried out, and the deviation of the flash height obtained by the finite element simulation and the forming test was only 10%. In addition, after the flash was eliminated, there was no folding defect on the surface of cylinder part. Thus, the test results verifies the credibility of the simulation results.

Funds：

国家自然科学基金资助项目(51775519)

作者简介：高帅(1994-)，男，硕士研究生 E-mail：gs_734980691@163.com 通信作者：张宝红（1971-），男，博士，教授，博士生导师 E-mail：zhangbh@nuc.edu.cn

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