Transactions of Materials and Heat Treatment

Title：Research on final forging process of the blank of hollow valve

Authors： Lin Xijia Zhang Zhengrong Mo Dongqiang Wu Xiumin

Unit： Guangdong University of Technology Huaiji Dengyun Auto-Parts(Holding)Co. Ltd.

KeyWords： hollow valve tubes rolling final forging numerical simulation

ClassificationCode：TG316.3

year,vol(issue):pagenumber：2015,40(11):13-18

Abstract：

The final forging process of hollow valve in the cross wedge rolling plus forging was researched. According to requirement of tube rolling and final forging of valve, several kinds of hollow valve blanks with different initial dimensions for final forging were designed, and the final forging processes under different process conditions were simulated by Deform-2D. The results show that the metal in the blank head flows mainly along the radial direction with a little axis flow to reduce the material of the blank head resulted in underfilling of the cavity. So the head volume is need to be compensated appropriately, and the influence of friction coefficient on the elongation of the blank stem can be neglected. The reasonable blank shape and dimension are determined according to the relation between the dimension of hollow valve blank and deforming conditions. The reliability of the simulation results was proved by final forging experiments, and the experimental results show that the hollow valve produced by cross wedge rolling-forging process is of perfect inner flowing line and high organization performance.

Funds：

广东省“扬帆计划”引进创新创业团队专项资助项目（201312G02）

林喜佳（1987-），男，硕士研究生

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