基于DEFORM 3D的汽车转向节锻造与缺陷形成机理  

Forging of automobile steering knuckle and defect formation mechanism basedonDEFORM3D

作　　者：蒋懋旭 涂君[1,2] 吴文涛 张旭 宋小春 Jang Maoxu;Tu Jun;Wu Wentao;Zhang Xu;Song Xiaochun(School of Mechanical Engineering,Hubei University of Technology,Wuhan 448000,China;Hubei Provincial Key Laboratory of Modern Manufacturing Quality Engineering,Wuhan 448000,China;Hubei Tri-Ring Motor Steering Gear Co.,Ltd.,Xianning 437100,China)

机构地区：[1]湖北工业大学机械工程学院,湖北武汉448000 [2]现代制造质量工程湖北省重点实验室,湖北武汉448000 [3]湖北三环汽车方向机有限公司,湖北咸宁437100

出　　处：《锻压技术》2024年第2期14-23,共10页Forging & Stamping Technology

基　　金：湖北省重点研发计划项目(2022BAA075)。

摘　　要：根据汽车转向节热锻成形过程中的主要影响因素即坯料始锻温度、模具预热温度、上模运动速度和摩擦因数,运用DEFORM 3D软件对汽车转向节热锻成形过程进行了数值模拟,并应用正交实验法对数值模拟结果进行分析。结果表明:随着始锻温度的升高,转向节在热锻过程中的最大等效应力减小,能量和金属最大流动速度增大;随着上模预热温度增加,转向节热锻过程中的最大等效应力逐渐减小,能量和金属最大流动速度逐渐增大;随着上模运动速度增加,热锻转向节的最大等效应力先减小后增加,能量和金属最大流动速度呈现增大趋势;随着摩擦因数增大,转向节的最大等效应力和金属最大流动速度呈先减小后增大的趋势,能量逐渐增大,并通过比较极差值R判断了各个因素的主次关系。Based on the main influencing factors of initial forging temperature for billet,die preheating temperature,upper die movement speed and friction coefficient during the hot forging process of automotive steering knuckle,the hot forging process of automotive steering knuckle was simulated by using software DEFORM 3D,and the numerical simulation results were analyzed by the orthogonal experimental method.The results indicate that with the increasing of initial forging temperature,the maximum equivalent stress during the hot forging process decreases,and the energy increases and maximum metal flow velocity increase for the steering knuckle.With the increasing of die preheating temperature,the maximum equivalent stress during the hot forging process of automotive steering knuckle gradually decreases,while the energy and maximum metal flow velocity gradually increase.With the increasing of upper die movement speed,the maximum e-quivalent stress initially decreases and then increases,while the energy and maximum metal flow velocity show an increasing trend.In ad-dition,with the increasing of friction coefficient,the maximum equivalent stress and maximum metal flow velocity of steering knuckle first decrease and then increase,and the energy gradually increases.Thus,the primary and secondary relation of each factor is determined by comparing range values R.

关 键 词：汽车转向节 热锻 DEFORM 3D 正交实验 缺陷 

分 类 号：TG316.3[金属学及工艺—金属压力加工]