Study Of Aspheric Surface Precision Grinding, Polishing And Its Compensation

Compared with sphere, aspheric optics owns a great imaging quality which is unparalleled. When applied in optical systems, they are helpful to correct aberration, improve imaging quality, promote ability of differential diagnosis, optimize system structure and so on. Recent years, along with needs of high-level and advanced products and technology, the requirement of aspheric optics is highly increasing and has very wide market prospect, meanwhile, higher and higher precision of grinding and detection is demanded. At the same time, aspheric surface precision grinding and polishing involving computer control, tool, material, detection and other technologies, which are the concentrated reflections of advanced machining technologies. However, how to high efficient and quality precision grinding is still a key point of research in the world.Based on the problem of high-difficulty and low-efficient, this topic developing the processing study of precision grinding and polishing on existing foundation, and optimizing the technological process by a series of contrast test. Then we analysis and study the machining error, such as grinding wheel wear and opposite reamer error, and based on the technology of images acquisition and processing make a quantitative study and compensation. At the same time, according to the characteristics of axisymmetric aspheric surface we proposed the technologies of three-dimension and a new NC-interpolation. In this article,3D-dimensition technology of aspheric surface based on numerical control technology and image acquisition and processing module, not only precision detecting form and machining accuracy, correction threshold, local compensation quantity, but also can make a reverse engineering research of unknown aspheric surface. Moreover, NC-interpolation technology developing the linear-interpolation method in NC program, processing in equal chord length on the basis of machining accuracy, and though theoretical analysis and case study we can make a conclusion that it really do a great help to achieve high efficient and quality in aspheric surface precision grinding. At last, compared with parallel grinding we put forward point grinding technology in aspheric surface grinding, and make scheme design and analysis of its dynamic characteristic analysis.