刀剪三轴端面磨削控制及误差补偿方法研究

Study on Control and Error Compensation Method of 3-axis Surface Grinding for Knifes and Scissors

为实现复杂、异形刀剪的端面磨削,提出一种空间端面磨削三轴联动控制方法。根据端面磨削的工艺特点与卧式端面磨床的结构特点,建立砂轮径向进给量、轴向进给量、旋转角度等加工参数与工件顶面磨削量、底面磨削量、磨削宽度等工艺参数间的函数关系,并结合端面的投影规律,实现一个旋转轴与两个平动轴的三轴联动控制。建立砂轮轴向进给误差与砂轮直径、刃线轮廓以及旋转角度间的函数关系,并提出误差补偿方法。试验结果表明,所提运动控制与误差补偿方法能够实现复杂、异形刀剪的端面磨削。

In order to implement surface grinding of the complicated and specially shaped knifes and scissors, a 3-axis motion control method for spatial surface grinding is proposed. Based on the characteristics of surface grinding and the horizontal surface grinder, the functional relationship between the set of machining parameters and the set of the process parameters is established. The set of machining parameters involves the radial feed, the axial feed and the angle of rotation, and the set of the process parameters involves the grinding depth of the top surface, the grinding depth of the bottom surface and the grinding width. And combined with the projection rules, the joint control of a rotational axis and two translational axes is implemented. The Z directional error is identified and formulated with respect to the wheel diameter, the edge contour, and the angle of rotation. Subsequently, an error compensation method is proposed. The grinding test shows that the surface grinding of the complicated and specially shaped knifes and scissors can be implemented, based on the proposed motion control and error compensation method.