Transactions of Materials and Heat Treatment

Title：Numerical simulation on valve forming process and structure optimization on extrusion mold

Authors： Chen Lei Wang Tingkun Wang Zongshen Cui Laisheng Zhu Lihua

Unit： Shandong University of Technology Zibo Aorike Electromechanical Technology Co. Ltd.

KeyWords： valve extrusion die forging transition fillet mold wear

ClassificationCode：TG316

year,vol(issue):pagenumber：2020,45(9):105-112

Abstract：

The finite element model of automobile engine valve forming process was built by DEFORM-3D, and the extrusion and die forging processes of valve were numerically simulated to analyze the metal flow rule, temperature and equivalent strain of billet and the temperature, equivalent stress and wear depth of mold during the forming process. The results show that the temperature and the stress at the transition fillet of the mold concentrate, and the severe wear occurs. And the structure of extrusion mold is optimized to obtain the optimum scheme by changing the radius of transition fillet. When the transition fillet radius of extrusion mold is 16 mm, the wear of extrusion and die forging molds is simultaneously improved, and the mold life is greatly increased. In addition, the simulation results agree very well with those of optical microstructure observation of valve forging, which verifies the reasonability and reliability of finite element model and optimization process to provide guidance for the practical production of valve.

Funds：

淄博市校城融合发展计划项目 (2018ZBXC037)

陈磊(1997-)，男，硕士研究生 E-mail：gtchenlei@163.com 通讯作者：王宗申 (1986-)，男，博士，讲师 E-mail：wangzsh@sdut.edu.cn

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