Four main contents of precision machining

The production process of precision machining refers to the entire process of making products from raw materials (or semi-finished products). Precision machining is technically difficult, has many influencing factors, involves a wide range, high investment, and strong product personality. The main contents are as follows :

Precision parts processing

(1) Processing mechanism, in addition to the precision of traditional processing methods, non-traditional processing (special processing) methods have developed rapidly. At present, the traditional processing methods mainly include precision cutting of diamond tools, precision grinding of diamond micro-powder grinding wheels, precision high-speed cutting and precision abrasive belt grinding. Non-traditional processing methods mainly include high-energy beam processing such as electron beam, ion beam, laser beam, EDM, electrochemical processing, photolithography (etching), etc., and electrolytic grinding, magnetic grinding, magnetic fluid with composite processing mechanism have appeared. Polishing, ultrasonic honing and other composite processing methods, the research on the processing mechanism is the theoretical basis of precision and ultra-precision machining and the growth point of new technologies.

Precision copper parts processing

(2) Material to be processed, the material to be processed by precision machining has strict requirements on chemical composition, physical and mechanical properties, chemical properties, and processing properties. There should be uniform texture, stable performance, no macroscopic and microscopic defects inside and outside, and the processed materials that meet the performance requirements can obtain the expected effect of precision machining.

Precision spare parts processing

(3)Processing equipment and process equipment, precision machining should have high-precision, high-rigidity, high-stability and automated machine tools, corresponding diamond tools, cubic boron nitride tools, diamond grinding wheels, cubic boron nitride grinding wheels, and corresponding Only high precision, high rigidity fixtures and other processing equipment can guarantee the processing quality. Precision machining should first consider precision machining machine tools with corresponding precision. Many precision machined parts usually start from the design and production of ultra-precision machine tools, and need to configure the required tools. At present, there are few precision machining machine tools in the general series, and the batches are not large. The cost of precision machining machine tools is very high, and special orders are required. Measures or error compensation to improve machining accuracy.

 

(4) Detection, precision machining must have corresponding detection technology to form the integration of processing and detection. There are three ways to detect precision machining: offline detection, in-situ detection and online detection. Off-line inspection refers to sending the workpiece to the inspection room for inspection after the processing is completed. On-site inspection means that the workpiece is not unloaded after being processed on the machine tool, and is inspected on the spot. If any problems are found, it is convenient for further processing. In-line inspection is inspection during the machining process so that active control and dynamic error compensation can be implemented.

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