Talking about the current research tasks of ultra-precision machining technology

Research on ultra-precision processing equipment and technology

After years of hard work, the development of domestic ultra-precision processing equipment has begun to take shape. The indicators of many equipment including aspheric surface composite processing systems have reached or approached the world’s advanced level. In terms of operability and other aspects, there is still a certain gap. How to better play the role of the equipment requires further investment in manpower and material resources.

With the development of science and technology, more advanced new functional materials and structural materials will be applied, including new high-strength, high-hardness materials, smart materials, new semiconductor materials, etc. The first thing to be solved is the processing problem. For example, research on the processing technology of SiC reinforced composite materials used in satellite cameras, research on ultra-precision turning technology of infrared materials such as germanium, single crystal silicon, and calcium fluoride glass, and research on fly-cutting processing technology of KDP crystal (laser nuclear fusion) Wait.

Research on Ultra-precision Machining and Inspection Technology of Complex Curved Surfaces (Guide: Briefly describe the six characteristics of CNC machining applied to tire molds)

The application of aspherical parts is very wide. It can reduce the weight of the optical system, improve the imaging quality, and improve the reliability of the system. In particular, the application of non-axial pairs into aspherical surfaces greatly improves the performance of the entire system. At present, it is not possible to process such surfaces in China.

Large and medium-sized aspheric surface ultra-precision machining equipment and technology research

Currently, foreign countries have partially lifted the ban on aspheric surface processing equipment. For example, Nanoform250 has imported several domestically, but the aspheric surface processing equipment with a processing diameter of 300mm or more is strictly prohibited, but this part of the number of parts is occupied in some industries A considerable proportion, so it has become an urgent task to develop ultra-precision machining equipment for medium and large aspheric surfaces as soon as possible. Several domestic units, including laboratories, have accumulated a certain degree of technical accumulation in the research of ultra-precision processing equipment and processing technology for aspheric surfaces. On this basis, joint efforts should be made to concentrate on tackling key problems.

Development of non-axisymmetric optical curved surface processing equipment (five-axis CNC ultra-precision machining center)

The performance of non-axisymmetric optical surfaces is superior to that of axisymmetric aspheric surfaces. At present, only the United States and Russia can process such products. Although many domestic colleges and universities have conducted research on various processing techniques of non-axisymmetric optical surfaces, such as numerical control polishing, ultra-precision turning and other methods, they have not yet been able to truly process products. Therefore, the country should step up the development of five-axis CNC ultra-precision machining centers, and on this basis, conduct research on non-axisymmetric optical surface processing technology.

Research on Ultra-precision Testing Technology of Aspheric Surface

Aspheric surface detection technology is the first key problem to be solved in optical aspheric surface processing, especially in view of my country's national conditions, at least for now, only manual auxiliary grinding can be used to process optical aspheric surfaces, and the measurement problem becomes more prominent. Only by accurately and quickly measuring the error of the parts in the processing process, the workers may grind accordingly to obtain high-precision aspheric optical parts. Compared with aspheric surface processing technology, its measurement technology lags far behind foreign countries. Optical aspheric surface inspection technology should be capable of quickly judging the surface error status during the mirror processing, random feedback to give further correction instructions, and to solve the final inspection of the parts.

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