数控凸轮轴高速磨削性能研究及其优化改进  

NC Camshaft High Speed Grinding Performance Study and Its Optimization

作　　者：范培珍[1] 何其宝[1] FAN Peizhen;HE Qibao(College of Automotive and Mechanical and Electrical Engineering,Lu An Vocational Technical College,Lu an 237158,China)

机构地区：[1]六安职业技术学院汽车与机电工程学院,安徽六安237158

出　　处：《成都工业学院学报》2018年第1期11-13,26,共4页Journal of Chengdu Technological University

摘　　要：凸轮轴数控加工方式易因联动磨削产生较大加速度,影响磨削伺服系统性能。针对此问题,构建数控凸轮轴高速磨削数学模型,分析凸轮轴工件磨削动力学机理,得出工件进给最大加速度,分析加速度超过限值时工件转速变化趋势,以此验证传统方法的不足。在此基础上,提出基于最小二乘多项式拟合的优化算法,实时优化分析凸轮轴加工过程中工件进给加速度变化。实验结果证明该优化算法能够较好的拟合原始样本数据,具有较小的控制误差。Because of linkage grinding,the camshaft NC machining mode is easy to produce greater acceleration,which affects the performance of grinding servo system.To solve this problem,a mathematical model for high-speed grinding of CNC camshaft is built to analyze the camshaft workpiece grinding dynamic mechanism and obtain the maximum workpiece acceleration.The trend of workpiece speed is analyzed when acceleration exceeds the limit,so as to verify the shortcomings of traditional method.On this basis,an optimization algorithm based on the least square polynomial fitting is proposed to optimize the acceleration change of the workpiece during the camshaft machining process.The experimental results show that the optimized algorithm can fit the original sample data well and has smaller control error.

关 键 词：凸轮轴 数控 高速磨削 优化 

分 类 号：TG580.2[金属学及工艺—金属切削加工及机床]