Abstract
The high-speed and high-precision motorized spindle is the future development trend of the CNC machine tool field, and has become the focus of research in the world. High-speed motorized spindles tend to develop in the direction of high precision, high speed, low energy consumption, high efficiency, and high reliability. We undertake a through, systematic review of the development history perspective of the research on precision bearing technology, dynamic balancing technology, thermal error measurement and compensation technology with regard to the key technologies of high-speed motorized spindles. On this basis, the current level of development of key technologies for high-speed motorized spindles is analyzed, and the objective advantages and disadvantages of existing technologies are summarized. Finally, the development tendency of high-speed motorized spindle technology is predicted and foreseen.
Highlights
As modern machine tools are developing towards high speed and high precision, the technical requirements for the spindles of machine tools are increasing
Complete dynamic balancing of the flexible spindle without trial weight is achieved The problem of low balancing efficiency due to multiple test weights required for traditional dynamic balancing is solved
The results show that the dynamic balancing method without trial weight can reduce the unevenness during the rotation of a spindle
Summary
As modern machine tools are developing towards high speed and high precision, the technical requirements for the spindles of machine tools are increasing. The structure of traditional rolling bearings makes it difficult to meet the requirements of high speed and high precision for high-speed machine tools, so the research of bearings is one of the key research objects in the field of high-speed machine tools [3]. The research on the dynamic balance characteristics of the high-speed motorized spindle is a hot issue in the key technology of the motorized spindle. The built-in motor and bearings will generate a lot of heat when the spindle is running at Machines 2022, 10, 145 a hot issue in the key technology of the motorized spindle.
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