In the precision machinery parts processing industry, it is very appropriate to use the old saying "A little bit is lost, a thousand miles away". Let me take you to understand the difference between CNC machining of precision mechanical parts and ordinary machining?
1. Differences in processing methods: The processing methods that should be carefully adopted in the traditional machining process of mechanical parts will become simple and feasible when processed by CNC machine tools. When performing hole position processing, the empty knife method and the trimming method used in the traditional machining process are replaced by the CNC trimming method in the CNC machining process.
2. High-speed machining in CNC machining of mechanical parts has unparalleled advantages over traditional machining processes. The following takes mold machining as an example for specific explanation. In traditional processing technology, multiple processing procedures are usually required to complete the mold processing tasks, while the use of high-speed processing only requires 1-2 procedures to complete, and because of the high precision of high-speed processing, it is not necessary to perform traditional processing. The two processes of electrical machining and grinding.
3. Differences in tool selection: The tools required by different processing techniques and methods are definitely different, especially in high-speed cutting, the processing efficiency and quality of precision mechanical parts of CNC machine tools have been greatly improved, as well as cutting deformation and processing cycle. decrease very much. Compared with the traditional processing technology, CNC precision machining has significantly enhanced requirements for all aspects of tool performance, and the installed tools have changed from a single tool to many tools.
4. The difference of thermal deformation: Thermal deformation is one of the inevitable problems in the process of workpiece cutting. When parts are precision processed, thermal deformation will directly affect the processing accuracy. The traditional processing method has many processes, and each process has a certain buffer time, which can reduce the temperature of the part before proceeding to the next process, effectively reducing the impact of thermal deformation.
Numerical control processing can continuously process multiple surfaces, and the cutting heat cannot be released in time. If prevention is prevented by controlling the time interval of each process, it will affect the efficiency of mechanical parts processing. Therefore, when high-precision mechanical parts are processed by numerical control, the method of cooling first and then finishing is also needed to reduce the influence of thermal deformation.