The production process of precision machining refers to the whole process of making products from raw materials (or semi-finished products). Precision machining is technically difficult, involves a wide range, and has high product autonomy. The main contents are as follows:
First, the processing mechanism, in addition to traditional processing methods, non-traditional processing methods are developing rapidly. The current traditional processing methods mainly include diamond tool cutting, diamond micropowder grinding wheel grinding, precision high-speed cutting and precision abrasive belt grinding. Non-traditional processing methods mainly include electron beam, ion beam, laser beam and other high-energy beam processing grinding, magnetic fluid polishing and other composite processing methods. The research on machining mechanism is the theoretical basis of precision and ultra-precision machining and the growth point of new technology.
Second, the processed materials. The processed materials for precision machining have strict requirements on chemical composition, physical properties, chemical properties, and processing performance. The material to be processed should be uniform in texture, stable in performance, free from macroscopic and microscopic defects in the exterior and interior, and meet the performance requirements in order to obtain the expected effect of precision machining.
Third, processing equipment and process equipment, precision machining should have high precision, high rigidity, high stability and automatic machine tools. The corresponding stainless steel stone tools, cubic boron nitride tools, diamond grinding wheels, cubic boron nitride grinding wheels, and corresponding high-precision, high-rigidity fixtures and other processing equipment can guarantee the processing quality.
Fourth, testing. Precision machining must have corresponding testing technology to form an integration of processing and testing. There are three methods for precision machining testing: offline testing, on-site testing and online testing. Off-line inspection means that after the processing is completed, the workpiece is sent to the inspection room for inspection. In-situ inspection means that the parts after processing on the machine tool are not removed, and if any problems are found, it is convenient for further processing. On-line detection is to detect during processing, so as to be able to actively control and implement dynamic error compensation.
