With the development of technology, the grinding methods of tungsten carbide ball are developing rapidly. There are conventional grinding methods (includes single V-slot, double V-slot and conical slot), fluid polishing (magnetic fluid, non-magnetic fluid) and high precision grinding (eccentric V-slot, active control of rotation), etc. Single V-slot grinding, the value of rotation angle depends on the angle and ball milled blank disc slot diameter, in a closed loop process almost from the corner does not change, and since the angle is very small, but only for a relatively compact carbide balls orientation change (i.e. ball billet rotation axis and the revolution axis angle of the same size) grinding motion.
The contact point of blank ball and polishing discs trace ball billet was formed on the surface of the center axis of the rotation axis of the ring. The defect of this method is that it can not ensure quickly billet surface grinding ball uniform, thereby reducing the efficiency and accuracy of carbide cemented carbide inserts and sphericity processing. Therefore, the related researchers modified in part designed to travel around the grinding disc moving grooves, making the ball spin axis changes can be made randomly. Compared with single V-slot grinding, both of the upper and lower grinding tray of tungsten carbide ball double V-slot grinding are V-shaped, while single V-slot only the lower grinding tray is V-shaped.