A review of research on thermal characteristics and cooling strategies of high-speed motorized spindles

High-speed motorized spindles play a vital role in manufacturing. In the process of high-speed rotation of the motorized spindle, the built-in motor and the high-speed running bearing will produce a lot of heat, and its heating will seriously affect the machining accuracy of the machine tool and the life of the spindle assembly. Therefore, the research on the thermal characteristics and cooling technology of the high-speed motorized spindle is an important measure to reduce the fire and explosion of the machine tool, improve the stability of the spindle and the safety of the machine tool, and is of great significance to ensure the stable operation of the high-speed motorized spindle. Based on the heat source, this paper puts forward two heating ways of high-speed motorized spindle, including bearing heating and motor heating, and probes into the thermal characteristic mechanism of high-speed motorized spindle and the modeling technology of thermal error compensation of high-speed motorized spindle in detail, and summarizes the bearing cooling technology, the principle, scope of application, advantages and disadvantages of motor cooling technology, and put forward corresponding improvement measures. And the future development of high-speed motorized spindle is prospected, and some new ideas are provided for the improvement of its technology.