Processing Of Ultra-precision Aspheric Surface Accuracy Of The Model

Ultra-precision machining technology is a kind of ultra-precision processing technology which combines the mechanical application of the new technology development, as well as the results of modern electronics, sensor technology, optics and computers and other high-tech. It is the basis in the field of high-tech technology. In the modernization of national defense science and technology and the development of national economy it plays a crucial role.In recent years, because of various aspects of attention, China's ultra-precision processing technology has made great progress. Ultra-precision cutting technology has been used in production workshops. Ultra-precision machine tools have been developed. Our country has been able to independently produce many high accuracy precision machineries and equipments. There is still a considerable gap compared ours Ultra-precision technological level with the developed countries'. And because it involves the development of the national defense industry, the key technology, all countries are confidential, ban on the transfer or export. Be a manufacturing powerful country, we must develop ultra-precision technology independently and rapidly.Because aspheric optical components have unique strengths and advantages, they were used more and more often in military and civilian fields. In the aviation and military fields, the optical system requires aspheric surfaces with high accuracy. Many aspheric optical devices are brittle crystal materials which are difficult for processing, such as Ge. With the unique advantages, single point diamond turning technique was widely used in aspheric single crystal of germanium processing.The ultra-precision machining process of single point diamond turning is a very complex process. There are many factors affecting the surface of parts machining quality. In order to improve the surface quality of Cutting and according to actual situation of the company which the author takes practice in, the author carries through an in-depth study to the impact of cutter parameters for the ultra-precision processing of germanium crystal turning aspheric surface accuracy, and concludes the mechanism of impact of the cutter radius compensation and the X-axis direction move of the cutter's centre for aspheric surface accuracy. The author takes the components' diameter, the aspheric surface's shaft radius of curvature, the cutter radius compensation and the X-axis direction move of the cutter's centre as independent variables, and takes the aspheric surface accuracy as dependent variables, then applies SPSS software through many methods to establish and analyze the regression models. From the best regression model, we can understand: When processing for the concave surface, the independent variables can be explained 26.5% of aspheric surface error changes. When processing for the convex surface, the independent variables can be explained 30.2% of aspheric surface accuracy changes.