The CNC machining process is derived from the conventional machining process and is an organic combination of conventional machining 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 processing precision and the complexity of the workpiece surface are becoming higher and higher. Therefore, CNC machining has received extensive attention, but in terms of cost savings, CNC machining is still more expensive than traditional machining. Below we will introduce the difference between CNC machining and traditional machining process.
1, processing technology
In the ordinary machining process, whether it is positioning reference, clamping method, tool, cutting method, etc. can be simplified, but the data processing process is more complicated, and these factors need to be fully considered, and even the same processing Tasks, CNC machining technology can have multiple solutions, can process multiple processing parts and processing tools as the main line, the process has diversified characteristics, which is the difference between CNC machining process and traditional machining process.
2, clamping and fixture
In the CNC machining process, not only the coordinate direction of the fixture and the machine tool is required to be relatively fixed, but also the dimensional relationship between the part and the machine coordinate system is coordinated. Moreover, the two steps of positioning and clamping need to be effectively controlled during the clamping process. Moreover, under the traditional machining process, since the machining capability of the machine tool itself is limited, it is necessary to perform multiple clamping during the machining process. Moreover, it is necessary to use a special jig, which results in a high cost of design and manufacture of the jig, which inevitably increases the production cost of the product. The positioning of the CNC machining process can be debugged by the instrument. In most cases, the design of the special fixture is not required, so the cost is relatively low.
3, the tool
During the machining process, the choice of tool needs to be determined according to the processing technology and processing method. Especially in CNC machining, the use of high-speed cutting is not only conducive to the improvement of machining efficiency, but also the processing quality can be guaranteed, effectively reducing the probability of cutting deformation, shortening the machining cycle, so the demand for cutting tools is further increased under the guidance of cutting. .
There is also a dry cutting method which cuts without cutting fluid or with a small amount of cutting fluid, so the tool needs to have good heat resistance. Compared with the ordinary machining process, the numerical control machining process has high requirements on the performance of the tool.