A novel double rotor coupling model for inner bore grinding process

Hydrostatic bearings are the supporting parts of hydrostatic spindles. Hence, the bearing inner bore roundness may affect the spindle shaft equilibrium position and rotation accuracy. Although many scholars have established various models to simulate the internal and external grinding process, the existing models cannot provide precise calculations for choosing an efficient grinding strategy, and the final bore roundness predictions are also insufficient. To achieve precise prediction for grinding process and final bore roundness, the coupling interaction between the grinding wheel spindle system and the workpiece-spindle system during the inner bore grinding process is considered, and then a novel inner bore grinding double rotor model is established. The model adopts iterative algorithm to calculate material removal and the bore roundness forming process. Based on the model, different inner bore grinding strategies are quantitatively simulated for a given grinding system. The material removal and inner bore forming process under different grinding conditions are compared. The final bore roundness roughly matches the experiment results. The proposed double rotor system model and the simulation algorithm could be a new path for further studies of the grinding transition process.