Heat transfer theory research and multi-physical field simulation optimization of high-speed motorized spindle

The thermal error generated by the high-speed motorized spindle during machining is the main reason for the exactness of the machine tool, so accurate thermal characteristics analysis is essential. In this paper, the experimental platform of motorized spindle was set up to measure the temperature and thermal displacement data at 10000r/min. Secondly, the simulation parameters of A02 high-speed motorized spindle are obtained through theoretical calculation, and the multiphysics simulation model is established. After calculation, the exactness of the temperature field model can reach about 95%, and the exactness of the displacement field can reach 85%, it shows that the simulation model can accurately predict the state of motorized spindle. Finally, a new cooling jacket structure is proposed, and it is found that the optimized temperature is reduced by 32.11% and the thermal displacement of the front surface is reduced by 32.63%. indicating that the improved cooling water jacket has better cooling performance than the traditional cooling water jacket.