Research Of The Structure And Process Of An Efficient Polishing Technology Combined Self-rotation And Co-rotation Movement

Large aperture optical system with the characteristics of high resolution, high energy collection ability is widely used in the new generation of space to earth observation system. However, At present the large and super large aperture optical components is widely used in the aviation and aerospace field, especially some large diameter silicon carbide elements with no hydrolysis properties have a big problem of low material removal efficiency. How to improve the efficiency of material removal with a high polishing precision is a difficult problem to be solved in the large aperture optical processing.In this paper, we study the existing computer controlled optical surfacing technology. A new polishing method of male self rotating wheel is presented. The material removal efficiency can be greatly improved, and the removal function can be maintained at the same time. It can meet the requirements of large diameter aspheric fabricationg in rough polishing stage. The new device by using wheel spinning compare to the existing equipment by using flat rotation processing has the following advantages:1. The material removal is carried out by using high-speed rotation of the grinding head, has a higher removal efficiency than the traditional polishing method by the same removal function area.2. The removal function has the central peak liking the Gauss type distribution,meets the requirements of the surface shaping.3.Easy to replace different sizes of grinding head meeting various fabricationg needs.4. It is compatible with matrix algorithm,can finish the surface shaping efficiently and precisely.5. Traditional planet grinding head movement’s rotary inertia is large due to the centrifugal moving motion,it can’t respond quickly in the polishing process..While the rotary inertia of the rotary wheel polishing device is smaller, the speed of response is faster in the process of precise motion control.According to the related process test, the device can achieve a high efficiency removal of SiC material,and has good removal stability. According to the results of the simulation processing, the removal function of this device has a very high efficiency of convergence, which has the potential to solve the problem of low efficiency in the manufacturing of large aperture optical components.