热锻工艺参数对模具磨损影响的有限元分析

针对某差速器盖热锻模,基于修正的Archard磨损模型,应用有限元模拟软件Deform分析了坯料和模具预热温度以及成型速度对终锻模磨损的影响规律。研究结果表明,在试验数据范围内,随着坯料预热温度的升高模具磨损量呈减小趋势,当坯料预热温度超过1230℃时,这种趋势放缓;提高模具预热温度,模具磨损量逐步增大,当预热温度超过200℃时这种趋势更加明显;成型速度小于400mm/s时,模具磨损量随成型速度的提高而减小,当成型速度超过400mm/s时,模具磨损量随成型速度的提高会先增大后减小。

Finite element analysis of effect of hot forging process parameters on die wear

The influencing rules of billet, die preheating temperature and forming speed on the wear of a finish-forging die for a differential mechanism cover was analyzed based on the modified Archard wear model and the finite element simulation software DEFORM.Within the scope of the experimental data, the research shows that： with the increase of billet preheating temperature, the wear is reduced gradually. When the billet preheating temperature is larger than 1 230 ℃, the trend is less obvious. Raising die preheating temperature, the wear increases gradually. When the preheating temperature is over 200 ℃, the trend is more obvious. The wear value of die decreases with the increase of speed when the forming speed is less than 400 mm/s. But when the forming speed is more than 400mm/s, the wear value of die increases first and then decreases with the increase of the forming speed.