Transactions of Materials and Heat Treatment

Title：Analysis on wear failure of warm forging die for gear

Authors： Zhang Jifang Jin Huijie Xu Yingruo

Unit： Henan Polytechnic Institute Shangqiu Institute of Technology

KeyWords： spur gear closed warm forging die wear response surface method die preheating temperature die hardness

ClassificationCode：TG376.2

year,vol(issue):pagenumber：2022,47(5):38-44

Abstract：

In order to extend the service life of warm forging die for gear, the closed warm forging process of gears was simulated and analyzed by software DEFORM and model Archard, the most serious wear area of die was predicted, and the code factor equation for wear amount of warm forging die for gear was established by the response surface method. Then, taking die preheating temperature, die hardness, punched skin thickness and transition fillet radius of die tooth tip as target parameters, the most serious wear area of die was parametrically analyzed. The prediction results show that the gear tooth profile is fully filled, and there is no slump in the gear teeth. After optimization, the wear amount in the most serious wear area is 1.42×10-5 mm, which is 5.63% different from the predicted value of the regression model, and the error is small. The optimal parameters combination is the die preheating temperature of 150 ℃, the die hardness of 55 HRC, the punched skin thickness of 2.7 mm and the transition fillet radius of die tooth tip of 0.4 mm, and the predicted service life of warm forging die for gear is 7746 pieces, which is in line with the production expectations of 6500 pieces. Thus, the prediction results of the response surface method are more accurate and can reduce the trial cost to a certain extent.

Funds：

2019年度河南省高等学校青年骨干教师培养计划项目(2019GGJS280)

作者简介：张继方(1991-)，男，硕士，助教，E-mail：991972669@qq.com；通信作者：徐颖若（1991-），女，硕士，助教，E-mail：289425501@qq.com

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