Quality control in CNC machining mode

CNC machining technology is widely used and has become the mainstream processing method in the industrial field. CNC machine tools have the characteristics of high efficiency, high precision and high automation, which can greatly improve the processing efficiency and reduce the processing cost. The quality control problem of CNC machining mode is also crucial, this paper will analyze the quality control problem of CNC machining mode from the following three aspects:

I. Machine tool quality control

As a key link in processing, CNC machine tools must have high-quality brands and complete performance characteristics. The quality of the machine tool is not only related to the processing efficiency, but also an important factor affecting the processing quality. Therefore, it is crucial to ensure the accuracy, rigidity, stability and other performance of the machine tool. The quality of the machine tool is often judged by the accuracy and stability of the machine tool workpiece. CNC machine tools have a high degree of automation, but a good machine tool needs regular maintenance, repair and tool change to ensure that the machine tool can always maintain a good processing state, so as to ensure the quality and accuracy of the machined parts.

II. Processing technology control

CNC machine tools can achieve high-precision machining, but the stability of the processing process is also one of the key factors restricting the quality control of CNC machining mode. The processing of different parts requires different process flows to operate. For general parts and parts with low tolerance requirements, simple processing methods can be used to meet the requirements, such as single-tool continuous processing technology, and multi-sided processing with one clamping. For high-precision and high-demand processing, we must pay attention to the restriction and control of processing technology, including the control of cutting parameters, cutting lubrication, tool wear, processing temperature and other aspects. Among them, the adjustment of cutting parameters is particularly important, and the feed rate and speed of the tool will have an important impact on the machining accuracy. It is necessary to control the size of the machining error by constantly adjusting the feed rate and speed of the tool during the machining process to achieve qualified quality.

III. Testing and assurance measures

Quality control in CNC machining mode needs to be guaranteed by reasonable testing and assurance measures. Inspection is an indispensable step in CNC machining quality control system. Detect the processing accuracy, shape, size, surface quality and other aspects of the covered parts. Common detection methods include coordinate measuring instrument, optical measuring instrument, microscope and so on. In addition to testing, assurance is also an important quality control step. The guarantee includes the calibration of the machine tool, the regular replacement of the tool and the wear detection, the detection and maintenance of the cutting fluid, and so on. For tool use, regular maintenance, wear detection and replacement are of great significance. Suitable machining lubrication fluid also plays an important role in ensuring machining accuracy and part surface quality. The cutting fluid in the machining process must be kept clean and replaced regularly to ensure the quality of the machining.

conclusion

The wide application of CNC machining technology makes it the core link in the processing and manufacturing process. The quality control in CNC machining mode includes three key aspects: machine tool quality control, machining process control, inspection and assurance measures. To ensure the processing quality and output quality, not only a single aspect, but a systematic complete control process, only in the processing of all aspects of the strict control in order to produce the best results and quality performance.