The machining method of cnc workpiece surface depends on the technical requirements of the machined surface. However, it should be noted that these technical requirements are not necessarily the requirements specified in the part drawing, and sometimes they may be higher than the requirements in the part drawing in some aspects due to technological reasons. For example, the machining requirements for some cnc machined parts are increased due to the non coincidence of datum. Or it may put forward higher processing requirements because it is regarded as precision reference.
After the technical requirements for the surfaces of CNC machined parts are clarified, the final processing method that can guarantee the requirements can be selected accordingly, and the processing methods for several work steps and each work step can be determined. The selected cnc machining method should meet the requirements of part quality, good processing economy and high production efficiency. For this reason, the following factors should be considered when selecting the processing method:
1. The machining accuracy and surface roughness that can be obtained by any CNC machining method have a considerable range, but only in a narrow range can it be economical. The machining accuracy in this range is economic machining accuracy. Therefore, when selecting the processing method, the corresponding processing method that can obtain economic processing accuracy should be selected.
2. The properties of CNC machining materials shall be considered.
3. The structural shape and size of CNC machined parts shall be considered.
4. Productivity and economy requirements shall be considered. High efficiency and advanced technology shall be adopted for mass production. It can even fundamentally change the manufacturing method of the blank, which can reduce the amount of labor in machining.
5. Consider the existing equipment and technical conditions of the factory or workshop When selecting processing methods, we should make full use of existing equipment, tap the potential of the enterprise, and give play to the enthusiasm and creativity of workers. However, continuous improvement of existing processing methods and equipment, adoption of new technologies and improvement of process level should also be considered.