CNC machine tool processing and traditional machine tool processing process procedures are generally consistent, but there have been significant changes. A machining method that USES digital information to control the displacement of parts and tools. It is an effective way to solve the problems of variable variety, small batch, complex shape and high precision of parts and realize high efficiency and automatic machining.
CNC machine tools at the beginning of the selection of aircraft parts with complex surface processing objects, to solve the common processing methods are difficult to solve the key. The biggest characteristic of nc machining is to use perforated tape (or tape) to control the machine tool for automatic machining. Because aircraft, rocket and engine parts have different characteristics: aircraft and rocket zero, component size, complex surface; Engine zero, small component size, high precision. Therefore, the aircraft, rocket manufacturing departments and engine manufacturing departments of the choice of CNC machine tools are different. In the aircraft and rocket manufacturing to use continuous control of large CNC milling machine, and in the engine manufacturing both use continuous control of CNC machine tools, but also use point control of CNC machine tools (such as CNC drilling machine, CNC boring machine, machining center, etc.).
CNC machining has the following advantages:
(1) reduce the number of tooling, machining complex shape parts do not need complex tooling. If you want to change the shape and size of parts, you only need to modify the parts processing procedures, which are applicable to the development and modification of new products.
(2) stable processing quality, high machining precision, high repeat precision, suitable for aircraft processing requirements.
(3) variety, small batch production of high production efficiency, can reduce the production preparation, machine tool adjustment and process inspection time, and because of the use of the best cutting quantity and reduce the cutting time.
(4) can be processed conventional methods are difficult to process complex surface, and can even process some parts of the processing can not observe.
The disadvantage of numerical control machining is that the machine tool equipment is expensive and requires maintenance personnel to have a high level.