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What are the characteristics of CNC machining?

November 24, 2022

Latest company news about What are the characteristics of CNC machining?

What are the characteristics of CNC machining
1. The drive chain is short. Compared with ordinary machine tools, the spindle drive is no longer a motor belt gear pair mechanism, but a transverse and longitudinal feed are driven by two servo motors respectively. Traditional components such as change gears and clutches are no longer used. The drive chain is greatly shortened.
2. High rigidity. In order to match the high precision of the CNC system, the rigidity of the CNC machine tool is high, so as to meet the requirements of high-precision processing.
3. Light drag, ball screw pair is used for tool rest (workbench) movement, with small friction and easy movement. The supporting special bearing at both ends of the lead screw has a larger pressure angle than the ordinary bearing, which is selected and matched when leaving the factory; The lubrication part of the CNC machine tool adopts oil mist automatic lubrication, which makes the CNC machine tool portable.
Machining characteristics of CNC machine tools
1. High degree of automation can reduce the physical labor intensity of operators. The NC machining process is automatically completed according to the input program. The operator only needs to start tool setting, load and unload the workpiece, and replace the tool. During the machining process, the main task is to observe and supervise the machine tool operation. However, due to the high technical content of CNC machine tools, the mental labor of operators is improved accordingly.
2. The machining parts have high precision and stable quality. The positioning accuracy and repeated positioning accuracy of CNC machine tools are very high, which makes it easier to ensure the consistency of the size of a batch of parts. As long as the process design and program are correct and reasonable, combined with careful operation, it can ensure that the parts can obtain high processing accuracy, and it is also convenient to implement quality control on the processing process.
3. High production efficiency. NC machine tool processing can process multiple processing surfaces in the clamping process again, and generally only the first piece is detected. Therefore, many intermediate processes such as scribing, size detection, etc. can be saved during the processing of ordinary machine tools, reducing the auxiliary time. Moreover, because the quality of parts processed by NC is stable, it brings convenience to the subsequent processes, and its overall efficiency is significantly improved.
4. It is convenient for new product development and modification. NC machining generally does not require a lot of complex process equipment. Parts with complex shape and high accuracy requirements can be processed by compiling processing programs. When the product is remodeled or the design is changed, only the program needs to be changed, but the tooling does not need to be redesigned. Therefore, NC machining can greatly shorten the product development cycle, providing a shortcut for the development of new products, product improvement and modification.
5. It can be developed to a more advanced manufacturing system. CNC machine tools and their processing technology are the basis of computer aided manufacturing.
6. The initial investment is large. This is due to the high cost of CNC machine tools, long preparation period for the first machining, and high maintenance costs.
7. High maintenance requirements. CNC machine tools are typical products of technology intensive mechatronics, which require maintenance personnel to understand both machinery and microelectronics maintenance, as well as better maintenance equipment.

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