Current status of ultra-precision machining technology for aspherical parts in China

      The research of ultra-precision machining technology in China began in the early 1980s, and there is a gap of more than 20 years with foreign countries. China's military photoelectric enterprises in the optical glass processing technology after years of development, aspheric CNC processing technology in recent years has also been greatly developed, especially the aerospace system should introduce some advanced technology and equipment, the technical level of some enterprises has been greatly improved, but the weapons industry photoelectric enterprises optical processing generally still use the traditional process, Most of the processing of aspherical surface is by hand grinding, the efficiency is very low, the manual repair process is also prone to error, poor reliability. Optical glass lens molding also only stays in the blank stage. With the increasing demand for large aperture and high precision aspherical mirror in modern weapons equipment, the improvement of aspherical processing technology is urgent. However, due to the high price of imported aspherical CNC machining equipment, most companies are only equipped with a small amount of equipment, which can only solve the aspherical processing of existing high-end products. It is difficult to form a batch and put forward a new process on this basis.