基于三轴联动的曲轴连杆颈切点跟踪磨削法研究

Research on Crankshaft Tangential Point Tracking Grinding Method Based on Three-axis

通过分析目前的基于两轴联动的曲轴连杆颈切点跟踪磨削法存在的各种不足,提出了基于三轴联动的曲轴连杆颈切点跟踪磨削法,砂轮可以在X轴和Y轴两个方向进行插补;对该磨削法的运动模型进行了研究。结果表明,采用这种磨削方法可以实现磨削点的恒线速度磨削,多次实验后的数据显示,连杆颈的圆柱度可以达到2μm,表面粗糙度Ra达到0.4μm,为获得较高的曲轴加工精度和表面质量提供了有效的方法。

By analyzing the deficiency of current crankshaft tangential point tracking grinding method based on two-axis,crankshaft tangential point tracking grinding method based on three-axis was proposed.The grinding wheel can move in X and Y axis direction.Their motion models were studied.The results show that this grinding method can achieve constant speed grinding.After experiments,the crankshaft pin can be machined with the cylindricity of 2μm and the surface roughness Ra of 0.4μm.And it provides an effective method to obtain high machining accuracy and surface quality of the crankshaft pin.