Numerical control processing technology originates from conventional processing technology, which is an organic combination of conventional processing technology, computer numerical control technology, computer-aided design and aided manufacturing technology. Due to the continuous development of technology, more and more parts need precision machining in modern manufacturing industry, and the requirements of machining accuracy and surface complexity are also higher and higher. Therefore, NC machining has been widely concerned, but in terms of cost saving, the cost of NC machining is still higher than that of traditional machining. Now we will specifically introduce the difference between CNC machining and traditional machining process.

1. Processing technology

In the ordinary machining process, whether it is positioning datum, clamping method, cutting tool, cutting method and other aspects can be simplified, but the data processing process is more complex, these factors need to be fully considered, and even if the same processing task, CNC processing technology can have multiple programs, which can take multiple processing parts and processing tools as the main line The arrangement of technology has the characteristics of diversification, which is the difference between numerical control processing technology and traditional machining technology.

2. Clamping and fixture

In NC machining process, not only the coordinate direction of fixture and machine tool should be relatively fixed, but also the dimension relationship between parts and machine tool coordinate system should be coordinated. And in the process of clamping, the two steps of positioning and clamping need to be controlled effectively. And under the traditional machining process, due to the limited processing capacity of the machine tool itself, it is necessary to carry out multiple clamping in the processing process. And need to use special fixture, which leads to fixture in the design and manufacturing costs are higher, virtually increased the production cost of the product. However, the positioning of NC machining process can be debugged by instruments. In most cases, special fixture design is not needed, so its cost is relatively low.

3. Cutter

In the process of machining, the selection of cutting tools needs to be determined according to the different processing technology and processing methods. Especially in NC machining, the use of high-speed cutting is not only conducive to the improvement of processing efficiency, but also can guarantee the processing quality, effectively reduce the probability of cutting deformation, shorten the processing cycle, so the demand for cutting tools is further increased under the condition of high-speed cutting.

At present, there is also a dry cutting method, this cutting method in the case of no cutting fluid or only a small amount of cutting fluid, so the tool needs to have good heat resistance. Compared with the common machining process, NC machining process has higher requirements for the performance of the tool.