Abstract: In order to improve productivity efficiency and the one-cut success rate of the V-shaped milling unbalance correction of the automatic rotor balancing machine, an analytical expression and a corresponding control strategy are studied, which makes use of the linear interpolation approach. The work includes the modeling method of V-shaped milling unbalance correction and the real-time parameter interpolation. Firstly, the accurate full model is presented in a very complex integral mode; then, the model is simplified based on the results of geometric calculations and the numerical integration; lastly, the complex model of V-shaped milling unbalance correction is reduced to an analytical expression, which is applicable to the general programmable logic controller (PLC). With the reduced analytical expression, a control strategy is put forth. In the strategy, PLC calculates the discrete data table of milling depth versus milling mass in advance. And in the real operation the linear interpolation method is used to get milling parameters, such as the milling depth. The application to the automatic balancing machine for the rotor armature proves that the reduced model and the control strategy can fit the weak calculation ability of PLC very well, and achieve a one-cut success rate of above 85% under the G6.3 balancing class. As a result the balancing processing time is shortened and the efficiency is improved greatly.

Key words: Automatic balancing machine, Balancing, Rotor, V-shaped milling unbalance correction