基于数值模拟的汽车差速器齿轮冷挤压工艺方案  

Study on Cold Extrusion Process of Automobile Differential Gears Based on Numerical Simulation

作　　者：冯文杰[1,2] 杨创创 陈莹莹 王萍[2] 周凤 FENG Wenjie;YANG Chuangchuang;CHEN Yingying;WANG Ping;ZHOU Feng(Key Laboratory of Advanced Manufacturing Technology for Automobile Parts,Ministry of Education;College of Mechanical Engineering;College of Vehicle Engineering, Chongqing University of Technology, Chongqing 400054 , China)

机构地区：[1]重庆理工大学汽车零部件先进制造技术教育部重点实验室,重庆400054 [2]重庆理工大学机械工程学院,重庆400054 [3]重庆理工大学车辆工程学院,重庆400054

出　　处：《重庆理工大学学报（自然科学）》2018年第4期75-80,共6页Journal of Chongqing University of Technology：Natural Science

基　　金：重庆市科委资助项目(cstc2014yykf A60001);重庆市教委科学技术研究资助项目(KJ1400944)

摘　　要：针对汽车差速器齿轮冷挤压成形缺陷问题,应用有限元软件Deform-3D再现其挤压过程,通过观察金属的流动情况,分析了齿形缺陷产生的原因,提出了模具齿形型腔小端轴向分流挤压成形工艺。数值模拟结果显示:采用该冷挤压成形工艺可以避免齿顶"缺肉"的问题。研究了凸模球面直径、入模半角、分流口台阶厚度对齿轮成形的影响规律,获得了最优工艺参数。工艺试验结果证明:轴向分流挤压成形方案及优化后的工艺参数能有效降低成形力,节省材料,提高成形质量。For the forming defects problem of differential gear in automobile,the extrusion process was simulated by the finite element software Deform-3D. Through observing the flowing of metal,the reason causing the tooth defects were found and the extrusion forming process which the medal split from the little end of mold cavity were present. The numerical simulation results show that the problem of ＂missing metal＂can be avoided in this process. Subsequently,the optimum process parameters were obtained through studying the influent of some factors,such as the spherical diameter of thepunch,the entrance half angle of the die,the thickness of the split step,on forming quality.Technology tests show that both the extrusion process of axial split and the optimum parameters can effectively reduce the forming force,save materials and improve the forming quality.

关 键 词：差速器齿轮 金属流动规律 轴向分流挤压 数值模拟 

分 类 号：TG376[金属学及工艺—金属压力加工]