The characteristics and classification of CNC lathes

　　Numerical control lathe as one of the widely used numerical control machine tools, mainly used for machining shaft, disc sleeve and other rotary parts. Through the program control, can automatically complete the internal and external cylinder, cone, arc, thread and other processes of cutting. Developed in recent years to the numerical control turning center and CNC milling center can be done once more machining process, improve the processing quality and production efficiency, and developed in recent years to the numerical control turning center and CNC milling center can be done once more machining process, improve the processing quality and production efficiency, etc., and to carry out slotting, drilling, etc. Expansion, reaming and so on. Therefore, it is especially suitable for processing complex shape rotary parts.

　　Two, the characteristics of CNC lathes

　　1. Short transmission chain: the two directions of the CNC lathe tool rest are driven by two servo motors. The servo motor is directly connected with the guide screw to drive the tool rest to move. Servo motor and guide screw can also be stepless replacement according to control instructions. There is no need to use multiple gear pairs to vary the speed between spindles. With the development of motor wide speed control technology, the goal is to eliminate the shift pair. Currently, the gear pair changes several speed ranges. Therefore, the internal structure of the headstock is much simpler than that of a traditional lathe.

　　2. High rigidity: matching with the high precision control of the control system to adapt to high precision machining.

　　3, light drag: knife rest action generally adopts ball wire pair, in order to drag the light, CNc lathe lubrication is more sufficient, most of the automatic lubrication of oil mist.

　　In order to improve the wear resistance of CNC lathe guide rails, steel guide rails are generally used, so that the accuracy of machine tools can be maintained for a long time, and the service life can be extended. In addition, the CNC lathe also has full cooling, strict protection and other structural characteristics, automatic operation in fully closed or semi-closed state. CNC lathes are generally equipped with automatic chip removal devices.

　　Two, the classification of CNC lathes

　　There are many kinds of CNC lathes, can be divided into simple CNC lathes (economic CNC lathes), multi-functional CNC lathes and CNC turning centers according to the function of CNC system and machinery.

　　1. Simple NUMERICAL control lathe (economical numerical control lathe) is a kind of low level numerical control lathe, usually controlled by single board machine or single chip microcomputer. The mechanical part is improved and designed on the basis of ordinary lathe.

　　2. Multi-function CNC lathe, also known as full-function CNC lathe, controlled by special CNC system, with various structural characteristics of CNC lathe.

　　3. CNC turning center added other shafts on the basis of CNC lathe.