汽车深轮辐齿坯件热精锻模具结构优化  

Structure optimization on hot precision forging die for automobile deep wheel spoke tooth blank

作　　者：万杭勇 夏琴香[1] 肖刚锋[1] 刘梅华 徐尔灵 Wan Hangyong;Xia Qinxiang;Xiao Gangfeng;Liu Meihua;Xu Erling(School of Mechanical and Automotive Engineering,South China University of Technology,Guangzhou 510641,China;Guangdong Shaozhu Precision Forging Co.,Ltd.,Shaoguan 512031,China;Guangdong Shaozhu Group Co.,Ltd.,Shaoguan 512031,China)

机构地区：[1]华南理工大学机械与汽车工程学院,广东广州510641 [2]广东韶铸精锻有限公司,广东韶关512031 [3]广东省韶铸集团有限公司,广东韶关512031

出　　处：《锻压技术》2025年第4期215-221,共7页Forging & Stamping Technology

基　　金：广东省科技专项资金项目(210907154533470)。

摘　　要：针对某变速箱齿轮热模锻成形时由于模锻力较大导致的模具易损坏等问题,以某SCr420H钢深轮辐齿坯件为研究对象,构建了基于Deform-3D的深轮辐齿坯件多工位闭式热精锻有限元模拟模型,并验证了该模型的可靠性。分析了多工位闭式热精锻成形过程中材料流动和应力应变分布,确定了模具结构设计的不合理处,并基于正交试验研究了拔模斜度和圆角半径等模具结构参数对闭式热精锻模锻力的影响规律,基于此获得了最优模具结构参数组合。试验结果表明:在大变形区域的过渡区域处,不合理的模具结构会使材料流动速度明显变差,导致成形模锻力增大。通过改变该处的拔模斜度和圆角半径,可改善其材料流动速度,减少材料流动阻力,优化后的模具能有效降低成形时的模锻力。In order to solve the problem that the die is easily damaged due to the large die forging force during the hot die forging of a gearbox gear,for a SCr420H steel deep wheel spoke tooth blank,a finite element simulation model of multi-station closed-die hot precision forging process for deep wheel spoke tooth blank was constructed based on Deform-3D,and the reliability of the model was verified.Then,the material flow and stress-strain distribution during the multi-station closed-die hot precision forging process were analyzed,and the unreasonable aspects of the die structure design were determined.Furthermore,based on orthogonal experiments,the influences of die structure parameters,such as draft angle and fillet radius,on the die forging force in closed-die hot precision forging were investigated,and the optimal die structure parameters combination was obtained.The experimental results show that in the transition region of the large deformation area,the unreasonable die structure produces obvious material flow velocity differences,resulting in the increasing of die forging forces.Changing the draft angle and fillet radius in this region improves the material flow velocity and reduces the material flow resistance.Thus,the optimized die effectively reduces the die forging force during forming.

关 键 词：深轮辐齿坯件 模锻力 多工位闭式热精锻 模具结构 正交试验 

分 类 号：TG315.2[金属学及工艺—金属压力加工]