Transactions of Materials and Heat Treatment

Title：Combined die design on precision forging of combined gear blank for automobile gearbox

Authors： Zhang Xiaoxu1 Du Zixue2

Unit： (1. School of Automotive Engineering Chongqing College of Electronic Engineering Chongqing 401331 China 2. School of Mechanotronics & Vehicle Engineering Chongqing Jiaotong University Chongqing 400074 China)

KeyWords： automobile gearbox combined gear blank hot precision forging combined die numerical simulation

ClassificationCode：TG376

year,vol(issue):pagenumber：2018,43(5):0-0

Abstract：

The combined reverse gear is an important part of automobile gearbox. For the lowcycle fatigue cracking of integer die in precision forging of

combined gear blank, a combined die structure for hot precision forging was proposed, and the stress analysis of the combined die was conducted by finite element software. The simulation results show that the combined die can reduce the tension stress at the dangerous area by more than 50% and avoid the lowcycle fatigue cracking. Furthermore, the stress state of die is improved and the risk of drilling at the joint is reduced by increasing the diameter of outer ring for the combined die, and the plastic deformation of outer ring in working condition is avoided by reducing the interference of combined die.

Funds：

国家科技支撑计划项目（2007BAG06B01）

作者简介：张晓旭（1982-），女，硕士，讲师 Email：775837114@qq.com

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