基于DEFORM3D的热锻工艺参数对连杆成形的影响分析

Effect of Hot Forging Process Parameters on Connecting Rod Forming Based on DEFORM 3D

运用DEFORM 3D软件对汽车发动机连杆热锻成形进行了数值模拟,研究了不同始锻温度、模具预热温度、模具速度及摩擦系数对连杆热锻成形的载荷、等效应力及金属流动特性的影响。结果表明:随着始锻温度增加,热锻连杆最大成形载荷逐渐减小,最大等效应力减小,而最小等效应力和金属最大流动速度增加。模具预热温度越高,最大成形载荷越小。随着模具运动速度增加,热锻连杆最大等效应力先减小后增加,而最小等效应力则先增加后减小,金属最大流动速度逐渐增加。随着摩擦系数增加,热锻连杆最大等效应力逐渐增加,而最小等效应力基本不变,金属最大流动速度逐渐减小。

The hot forging forming of automobile engine connecting rod was numerically simulated by using 3D DEFORM software. The effects of different initial forging temperature, die preheat temperature, die speed and friction coefficient on the load, equivalent stress and the metal flow characteristics of hot forging connecting rod were researched. The results show that with the increase of the initial forging temperature, the maximum forming load of hot forging connecting rod decreases gradually, maximum equivalent stress decreases and minimum equivalent stress and maximum metal flow velocity increase. The higher the die preheating temperature is, the smaller the maximum forming load is. With the increase of die movement speed, the maximum equivalent stress of hot forging connecting rod decreases firstly and then increases, while the minimum equivalent stress increases firstly and then decreases, and metal maximum flow rate increases gradually. With the increase of friction coefficient, the maximum equivalent stress of hot forging conecting rod increases gradually, while the minimum equivalent stress is basically unchanged, and metal maximum flow rate decreases gradually.