Numerical control processing technology is derived from conventional processing technology and is an organic combination of traditional processing technology, computer numerical control technology, computer-aided design, and auxiliary manufacturing technology. Due to the continuous development of technology, more and more parts need precision machining in modern manufacturing, and the requirements for machining accuracy and surface complexity of the workpiece are also getting higher and higher. Therefore, CNC machining has received widespread attention, but the cost of CNC machining is still higher than that of traditional machining.
The ordinary machining process can be simplified by positioning datum, clamping method, tool, cutting method, etc. Still, the data processing process is more complicated, and these factors need to be fully considered. Even the same processing, the CNC machining process can have multiple schemes, arranging multiple machining parts and machining tools as the mainline. The process has diversified characteristics. This is the difference between the CNC machining process and the traditional process.
In the CNC machining process, it is necessary to ensure that the coordinate directions of the fixture and the machine tool are relatively fixed and to coordinate the dimensional relationship between the parts and the machine tool coordinate system. The two steps of positioning and clamping need to be effectively controlled during the clamping process. Under the traditional machining process, due to the limited machining capacity of the machine tool itself, it is necessary to perform multiple clamping during the machining process. Moreover, it is necessary to use unique fixtures, which leads to higher costs in the design and manufacture of fixtures, and virtually increases the production cost of the product. The instrument can debug the positioning of the CNC machining process. No special fixture design is required in most cases, so the cost is relatively low.
In processing, the choice of tools needs to be determined according to the processing technology and processing methods. Especially in CNC machining, high-speed cutting is conducive to improving machining efficiency. The machining quality can be guaranteed, effectively reducing the probability of cutting deformation and shortening the machining cycle. Therefore, the demand for cutting tools under high-speed cutting further increases. At present, there is also a dry-cutting method. This cutting method performs cutting without adding cutting fluid or only adding a small amount of cutting fluid, so the tool needs to have good heat resistance. Compared with ordinary machining technology, CNC machining technology has higher requirements for cutting tools' performance.