Abstract: 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.

Key words: error compensation, knifes and scissors, motion control, surface grinding