R-type milling is the most widely used in fully automatic balancing machines due to its advantages of large unbalance and easy positioning. The schematic diagram of the R-type milling de-duplication model is shown in Fig. 3. The unbalanced quantity is usually expressed as "gram · m", which is a vector, which is the product of the mass at one point of the rotor correction plane and the distance from the point to the rotor axis. Since the de-weighting mass is distributed in the circumference and the radial direction, it is obvious that the de-weighting mass multiplied by its centroid to the rotor axis distance will have a large error, and actually should be the integral of the unbalanced vector at each point on the de-weight surface. At the same time, considering the influence of other factors on the circumference of the rotor (such as the irregularity of the groove surface, the roughness of the surface, etc.), the unbalanced amount removed may not be a standard arched block, and the de-weighting model adopted by the system may be Expressed as: W = k· ρ·1·h· α·x2,where k is the adjustment factor; ρ is the density of the rotor's weight removal; l is the milling length; h is the milling depth; α is the de-centering angle (α= 2arcsind2R, d is the thickness of the milling cutter); x is the vector radius of the unbalanced quantity, considering the influence of the radial distribution x = (R - h /2) ; The analysis of the de-weighting model can be concluded that the milling de-duplication can be pressed The control method is divided into two processing methods: controlling the milling depth and controlling the milling length. In the actual application process, the selection can be made according to the specific requirements of the workpiece, and the corresponding control strategy is implemented by the software. If the first de-duty operation fails to achieve the workpiece dynamic balance, the second and third de-duplication models are more complicated.

Figure 3 R type milling