High speed electric spindleThe built-in motor spindle unit is an important component of CNC machine tools. The spindle motor is installed in the spindle unit of the machine tool to drive the spindle, thereby integrating the motor and spindle into a whole. To improve the operational efficiency of CNC machine tools, it is necessary to master the technical points of high-speed electric spindles, leverage their advantages, and promote the continuous improvement of electric spindle technology.

The advantages of high-speed electric spindle in traditional CNC machine tools are that during the operation of the spindle, it mainly drives the intermediate variable speed device and transmission device, such as gears, belts, and couplings, while exerting the driving effect of the motor. This is called the "mechanical spindle", also known as the separate spindle and the direct spindle. Compared to traditional spindles, electric spindles have the following advantages. When the spindle is running, it is driven by an internally installed motor without any variable speed or transmission device in between. Its design structure is simple and compact, which improves computational efficiency and high accuracy. During operation, there will be minimal noise and vibration. By utilizing AC frequency conversion technology, the electric spindle can be infinitely variable within the rated speed range. During the operation of the machine tool, regardless of any working conditions or load changes, the electric spindle has good adaptability. The built-in motor can control the closed-loop vector during operation, effectively adjust power according to control instructions, and flexibly control the operating speed and output torque of the driving device. Electric spindles can meet various high-power requirements, such as high torque, low-speed heavy cutting, or high-speed precision machining. Electric spindles can play a good role, achieve accurate stopping, and meet the C-axis transmission function.

The electric spindle integrates the motor and spindle into a unit, allowing for mass production and achieving a certain scale, making production more specialized. As a functional component of CNC machine tools, the electric spindle has also entered the market as a commodity. Enterprises can choose electric spindles according to the operational needs of CNC machine hosts, which will promote the development of modular machine tools.