The CNC double-column vertical lathe is a high-precision machine tool. Its composition mainly includes the following aspects:

1. Spindle system: The spindle system is the core part of the lathe. It consists of the spindle, bearings, spindle box, etc. The rotational motion of the spindle is the basic motion of the lathe, and its rotational accuracy and stiffness have an important impact on the machining accuracy and surface quality.

2. CNC system: CNC system is the control system of lathe. It consists of CNC device, servo driver, servo motor, etc. The CNC system can achieve high-precision machining, and has the characteristics of automation and intelligence, which improves processing efficiency and processing accuracy.

3. Transmission system: The transmission system is the transmission device of the lathe, which consists of belts, gears, chains, etc. The function of the transmission system is to transmit the rotational motion of the spindle to various processing parts while ensuring the stability and accuracy during the processing.

4. Auxiliary devices: Auxiliary devices include cooling systems, chip removal systems, protective devices, etc. These devices play an important role in ensuring smooth processing and safe operation.

5. Operation panel: The operation panel is the human-machine interface of the lathe. It contains various operation buttons and control switches. The design of the operation panel should be simple, clear and easy to operate, allowing the operator to quickly master the operation method of the lathe.

To sum up, the CNC double-column vertical lathe mainly consists of the spindle system, CNC system, transmission system, auxiliary devices and operation panel. These components work together to achieve high-precision, efficient turning operations.