CNC machining technology is an application technology that is continuously developed and gradually improved with the generation of CNC machine tools. The research object is the integrated technology related to the whole process of CNC machining by CNC equipment. The most direct research object is closely related to CNC equipment. CNC device, control system, NC program and programming method. The CNC machining process is derived from the traditional machining process, combining traditional machining technology, computer numerical control technology, computer aided design and auxiliary manufacturing technology. A typical feature is that the ordinary machining process is fully integrated into the CNC machining process. The CNC machining process is the basis of CNC programming. The high-quality CNC machining program is derived from careful and meticulous technical feasibility analysis, overall process planning and CNC machining process design.
The programmer receives a CNC programming task for a part or product. The main tasks include the feasibility analysis of the CNC machining process based on the design drawings and related technical documents of the part or product, and the machining method for completing the NC machining of the part; selecting the type of CNC machine tool And specifications; determine the machining coordinate system, select the fixture and its auxiliary tools, select the tool and tool clamping system, plan the CNC machining plan and process route, divide the machining area, design the NC machining process content, write the NC program, and debug the NC program. Actual processing verification, and finally complete, solidify and archive all CNC process files. CNC programming can be easily understood from the design drawing of the part to the completion of the NC machining program.
The CNC machining process is the core of CNC programming. Only when the CNC machining process is rationally and scientifically integrated into NC programming, programmers can produce high-quality and high-level NC programs. CNC programming is also the process of gradually improving the CNC process.
The general processing technology is the basis and technical guarantee of the CNC machining process. Since the CNC machining uses the computer to automatically control the machining process, the CNC machining process has the following characteristics.
1. CNC machining process is much more complicated than ordinary machining process
The CNC machining process should consider the processability of the machined parts, the positioning reference and the clamping method of the machined parts, and also select the tool, formulate the process route, cutting method and process parameters, etc., which can be simplified in the conventional process. Therefore, the numerical control machining process is much more complicated than the ordinary machining process, and there are many influencing factors. Therefore, it is necessary to comprehensively analyze and rationalize the whole process of numerical control programming, and then improve the whole. The same CNC machining task can have multiple CNC process schemes. You can choose to arrange the process with the machining part as the main line, or you can choose to use the machining tool as the main line to arrange the process. The diversification of CNC machining processes is a feature of CNC machining processes and is a significant difference from traditional machining processes.
2. CNC machining process design must have strict rules
Due to the high degree of automation of CNC machining, the adaptive ability of CNC machining is relatively poor. Moreover, the influencing factors of CNC machining are more complicated and require careful consideration of the whole process of CNC machining. The design of CNC process must be very organized. That is to say, the design process of CNC machining process must be thorough, rigorous and error-free.
3. The inheritance of CNC machining process is better
Anything that has been verified by debugging, calibration and test cutting process, and proved to be a good CNC machining process in the practice of CNC machining, can be used as a template for subsequent processing of similar parts, which not only saves time, but also guarantees quality. As a template itself, it is also a process of continuous modification and perfection in the call, which can achieve the effect of gradually standardization and serialization. Therefore, the numerical control process has very good inheritance.
4. CNC machining process must be verified to guide production
Due to the high degree of automation of CNC machining, safety and quality are of paramount importance. The CNC machining process must be verified before it can be used to guide production. In ordinary machining, the craft files written by the craftsman can be directly down to the production line for guiding production, generally without the complicated process described above.
