CNC, also known as computer gong, CNC ch CNC machine tool, is actually a method in Hong Kong. Later, it was introduced into the Pearl River Delta in mainland China. In fact, CNC milling machine is a new type of machining technology. Its main work is to prepare processing programs, that is, to change the original manual work into computer programming. Of course, you need to have experience in manual processing.

CNC machining has the following advantages:

1. The number of tooling is greatly reduced, complex tooling is needed to process parts with complex shapes. If the shape size of the parts are changed, only the part processing procedure needs to be modified, which is suitable for the development modification of new products.

2. The machining quality is stable, the machining precision is high, the repetitive precision is high, it can meet the machining requirements of aircraft.

3. In the case of multi variety small batch production, the production efficiency is higher, which can reduce the time of production preparation, machine tool adjustment process inspection, reduce the cutting time due to the use of better cutting amount.

4. It can process complex surfaces which are difficult to be processed by conventional methods, even process some parts which cannot be observed.

The disadvantage of NC machining is that the cost of machine tools equipment is expensive, maintenance personnel are required to have a high level.