In order to improve the machining accuracy of the cylindrical surface of silicon nitride ceramic spindle, the machining technology of the cylindrical surface of ceramic spindle was studied by high-speed universal cylindrical grinder in this experiment. Firstly, the primary and secondary order of the influence of various factors on the surface roughness of ceramic spindle is determined by orthogonal experiment, then the influence law of single grinding parameter on the surface roughness of ceramic spindle is explored by single factor experiment, and the prediction model of the grinding surface roughness value of ceramic spindle is calculated by numerical analysis software, and finally the optimal processing parameters of the cylindrical surface of ceramic spindle are obtained. The experimental results show that the grinding surface roughness of silicon nitride ceramic spindle first decreases and then increases with the increase of grinding wheel linear speed and workpiece linear speed, and then increases with the increase of transverse feed speed and axial feed speed. The relative error between the predicted value of the prediction model and the actual measured value is less than 5%, which shows that the prediction model has a good prediction effect and provides a theoretical basis for actual machining.

Keywords: Silicon nitride ceramic spindle, surface roughness, Roundness and cylindricity, High speed grinding, prediction model.