离合器外齿毂冷挤压成形工艺参数多目标优化  

Multi-objective optimization of cold extrusion forming process parameters for clutch outer gear hub

作　　者：刘左发 冯文杰 陈莹莹[1,3] LIU Zuo-fa;FENG Wen-jie;CHEN Ying-ying(College of Mechanical Engineering,Chongqing University of Technology,Chongqing 400054,China;Key Laboratory of Advanced Manufacturing Technology for Automobile Parts,Ministry of Education,Chongqing University of Technology,Chongqing 400054,China;Vehicle Engineering Institute,Chongqing University of Technology,Chongqing 400054,China)

机构地区：[1]重庆理工大学机械工程学院,重庆400054 [2]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 [3]重庆理工大学车辆工程学院,重庆400054

出　　处：《塑性工程学报》2020年第4期13-20,共8页Journal of Plasticity Engineering

基　　金：重庆市科委资助项目(cstc2014yykfA60001);重庆市教委科学技术研究资助项目(KJ1400944)。

摘　　要：针对某汽车离合器外齿毂冷挤压成形中出现的成形载荷大、材料利用率低和内花键圆角填充不饱满的缺陷,采用中心复合试验设计建立以入模半角、坯料壁厚、定径带长度和摩擦因子为优化变量,以成形载荷、坯料体积和内花键圆角间隙为优化目标的二阶响应面模型,并运用基于Pareto解的多目标遗传算法对模型迭代寻优,获得一组最优工艺参数:入模半角为26°、坯料壁厚为6.8 mm、定径带长度为10 mm及摩擦因子为0.10。有限元模拟和工艺试验验证结果表明:采用最优工艺参数能有效降低成形载荷并提高材料利用率,内花键圆角填充效果也得到了明显改善。试验结果与模拟结果基本吻合,验证了该优化方法的正确性。In view of the defects such as large forming load,low material utilization and insufficient filling of internal spline fillets during the cold extrusion forming process of automobile clutch outer gear hub,second-order response surface models with die semi-angle,wall thickness of billet,length of calibration band and friction coefficient as the optimization variables and forming load,billet volume and clearance of internal spline fillets as the optimization objectives were established by using the central composite experiment design.And the multi-objective genetic algorithm based on Pareto solutions was applied to optimizing the models iteratively.A set of optimal process parameters is obtained as follows:the die semi-angle is 26°,the wall thickness of billet is 6.8 mm,the length of calibration band is 10 mm and the friction coefficient is 0.10.The finite element simulation and the process test verification results show that with the optimal parameters,the forming load can be effectively reduced,the material utilization as well as the filling effect of internal spline fillets are significantly improved.The experimental results are basically in agreement with the simulation results,which verifies the correctness of the optimization method.

关 键 词：离合器外齿毂 冷挤压 响应面法 遗传算法 多目标优化 

分 类 号：TG136[一般工业技术—材料科学与工程]