Development and Application of Precision Mechanical Processing Technology

　Fine mechanical processing skills are advanced manufacturing skills developed to meet the needs of modern high skills, and are the foundation for the implementation of other high-tech skills. It comprehensively applies new achievements in the development of mechanical skills, as well as high-tech skills such as modern electronics, sensing skills, optics, and computers. It is a fundamental skill in the high-tech field and plays a crucial role in the modernization of national defense science skills and national economic construction. At the same time, it is a fundamental skill and an important component of modern high-tech, promoting semiconductor skills, optoelectronic skills The cross development and progress of multiple skills such as materials science. The mechanical processing method with a machining accuracy of 1 micrometer is achieved through the use of precision machine tools, precision measuring tools, and gauges under strictly controlled environmental conditions.



Ultra precision machining refers to the process where the machining accuracy reaches or exceeds 0.1 micrometers. In the aerospace industry, fine machining is mainly used to process fine Machine element in aircraft control equipment, such as fine mating parts in hydraulic and pneumatic Servomechanism, gyroscope frames, shells, air flotation, liquid floating bearing components and floats. The structure of fine components in aircraft is chaotic, with low stiffness and high precision requirements, and the proportion of difficult to machine materials is relatively large. The process effect of fine mechanical processing is: ① the geometric shape and mutual position accuracy of the parts reach the micrometer or angular second level; ② The boundary or feature size tolerance of the part is below micrometers; ③ The micro unevenness of the part surface (uniform height difference of surface unevenness) is less than 0.1 micrometers; ④ The requirement for satisfactory mating strength of the mutual parts; ⑤ Some parts can still meet precise mechanical or other physical characteristics requirements, such as the torsional stiffness of the torsion bar of the float gyroscope and the stiffness coefficient of the flexible components.



In recent years, most cars, mold parts, and metal processing have chosen CNC machine tools as the center of production. When machining holes, advanced equipment such as machining centers and CNC machining machines have also been used. High speed and high-precision drilling and machining have been put on the agenda. Regardless of the field of precision machining, achieving high-precision and high-speed processing is an important competitive means to obtain user orders.