20CrMnTi倒挡中间齿轮精锻成形工艺模拟与优化  

Simulation and Optimization of Precision Forging Process of 20CrMnTi Spur Gear

作　　者：洪新阳 王士灿 周昊奕 邱海亮 HONG Xin-yang;WANG Shi-can;ZHOU Hao-yi;QIU Hai-liang(Zhejiang Feng an Gear CO.,LTD.,Pujiang 322200,China;College of Mechanical andAutomotive Engineering,Zhejiang University of Water Resources and Electric Power,Hangzhou 310018,China)

机构地区：[1]浙江丰安齿轮股份有限公司,浙江浦江322200 [2]浙江水利水电学院机械与汽车工程学院,浙江杭州310018

出　　处：《浙江水利水电学院学报》2019年第4期67-73,共7页Journal of Zhejiang University of Water Resources and Electric Power

摘　　要：倒挡齿轮作为汽车的传动零件,在齿轮锻造产业中一直占有十分重要的地位。但在20CrMnTi合金钢进行锻造过程中会产生残余应力,影响齿轮的齿面精度与机械性能。同时该材料的锻造成形力也相对较大,影响着模具的使用寿命。为此运用Deform-3D软件对齿轮锻造过程进行了数值模拟,获得了残余应力的分布特征和成形力的大小。以响应面分析不同工艺参数对残余应力和成形力的影响,对工艺参数进行优化,从而降低残余应力和成形力。结果表明,当坯料温度为850℃,变形速率为5 mm/s,摩擦系数为0.05时,可使齿轮获得较小的残余应力和成形力。As the transmission parts of automobiles,the reverse gear has always occupied a very important position in the gear forging industry.However,residual stress is generated during the forging process using 20CrMnTi alloy steel,which affects the tooth surface accuracy and mechanical properties of the gear.At the same time,the forging force of the material is relatively large,which affects the service life of the mold.For this reason,Deform-3D software was used to simulate the gear forging process,and the distribution characteristics of residual stress and the forming force were obtained.The response surface was used to analyze the influence of different process parameters on residual stress and forming force,and the process parameters were optimized to reduce residual stress and forming force.The results show that when the billet temperature is 850°C,the deformation rate is 5 mm·s-1,and the friction coefficient is 0.05,the gear can obtain less residual stress and forming force.

关 键 词：直齿圆柱齿轮 DEFORM-3D 数值模拟 响应面优化 

分 类 号：TG316[金属学及工艺—金属压力加工]