摘要
针对发动机凸轮轴数控磨削时产生连续变化的弹性变形问题,分析了凸轮轴受到磨削力变形对凸轮轮廓精度的影响,对轴向和径向变形进行了解耦,推导了不同位置、不同相位下凸轮受力变形量求解方程。分析了数控凸轮轴磨床的插补原理,建立了含有变形量误差的、工件旋转轴和砂轮进给轴联动的磨削运动学方程,提出了X轴变形量与理论插补值进行几何叠加的指令修正误差补偿方法。对某发动机进排气凸轮轴磨削变形进行了建模与仿真,对数控凸轮轴磨床进行了补偿与加工试验,仿真与加工试验结果均表明磨削变形补偿可以将凸轮轴的轮廓精度提高5μm。
To solve the camshaft＇s deformation compressed by the continuous and variable force when grinding, the influence of grinding force on the cam＇s curve accuracy was analyzed. The axial deformation and radial deformation were decoupled. The deformation value solution equation in variable position and angle was deduced. The interpolation principle of the CNC （computer numerical control） camshaft grinder was analyzed. The X - C linkage kinematics equation which included deformation errors, workpiece rotation axis, and grinding wheel axis was built. The soft error compensation manner by adding the errors to the interpolation value was proposed. The deformation error of one intake-exhaust camshaft was modeled and simulated. The CNC camshaft grinder was compensated and the manufacturing test was executed. The simulation and manufacturing result showed that camshaft＇s contours accuracy was improved 5 μm by the deformation compensation.
出处
《农业机械学报》
EI
CAS
CSCD
北大核心
2013年第6期274-279,共6页
Transactions of the Chinese Society for Agricultural Machinery
基金
国家自然科学基金资助项目(50775004)
北京市教委资助项目(KM200710005003)
关键词
发动机
凸轮轴
磨削变形
仿真
误差补偿
Engine Camshaft Grinding deformation Simulation Error compensation
