数控凸轮轴磨床工件旋转轴转速优化方法  

Optimization Method of Workpiece Rotation Shaft Speed of CNC Camshaft Grinding Machine

作　　者：王洪[1,2] 戴瑜兴[1,3] 许君[1,4] 李宗鉴 

机构地区：[1]湖南大学电气与信息工程学院,长沙410082 [2]湖南师范大学工程与设计学院,长沙410081 [3]温州大学物理与电子信息学院,温州325035 [4]宇环数控机床股份有限公司,长沙410323

出　　处：《机械工程学报》2014年第15期205-212,共8页Journal of Mechanical Engineering

基　　金：科技部科技型中小企业技术创新基金(11C26214305382);湖南省自然科学基金(13JJ3056)资助项目

摘　　要：根据恒磨除率原理,建立了凸轮轴磨削数学模型。通过对凸轮轴数学模型的分析以及系统驱动能力的限制,确定了工件转速非圆段的降速比与砂轮水平进给的最大速度、最大加速度、最大加加速度。提出砂轮进给正、反向同步加减速的控制方法,动态地求解正反向插补会合点同时达到最大进给速度,实现凸轮旋转的最优速度插补。将上述算法进行编程与仿真,并运用到YTMK-CNC8336-16数控凸轮轴磨床加工中。试验结果表明:采用该方法磨削的凸轮轴升程误差可控制在?0.015 mm以内,工件表面粗糙度达到Ra0.25μm,非圆磨削段加工效率提高了30%,实现了凸轮轴的精密高效磨削加工。Based on the constant removal rate method, the mathematical model of the cam grinding is built. Through analyzing the cain＇s grinding model, the constraints of cam＇s driver, some system＇s parameters are obtained, such as the slow-down ratio of workpiece, and the maximal speed, the maximal acceleration and the maximal differential acceleration of the wheel＇s horizontal feed. A control method of the grinding wheel＇s feed speed is proposed. The forward and reverse interpolation point can be dynamic solved to meet the maximum wheel＇s feed speed, and the optimal interpolation is achieved. Finally, the algorithm is simulated by Matlab, and it is applied to YTMK-CNC8336-16, which is a CNC camshaft grinding machine. The experimental results indicate that the camshaft lifting error is less than 0.015 mm, the surface roughness is less than 0.25 μm, and the grinding efficiency is increased by 30%.

关 键 词：凸轮磨削 转速优化 加减速控制 插补 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]