Research On Double-sided Polishing Process Algorithm Based On CCOS

Ultra-precision machining technology of optical components is the basic core technology of a country,which has important influence on the military and scientific research of the country.As the last processing process of optical element precision machining,the processing time can take up about two-thirds of the entire processing time,directly determines the final component forming processing quality,rapid development has been achieved in recent years.CCOS polishing technology is an advanced machining technology which controls the surface forming of optical element based on computer.Through the in-depth study of this technology,it is found that the whole process is carried out around the Preston equation.According to the discrete material removal principle,it is found that the solution residence time is the key core of the whole process,which directly determines the polishing efficiency and the surface shape accuracy of the processed components.The traditional resident time algorithm has some problems such as ill-posed and ill-posed.In the process of double-sided polishing,the best solution to these problems is found by selecting the appropriate removal function model to calculate the resident time.This paper starts from the working principle of CCOS,takes the solution of resident time as the core,and USES the double-sided polishing motion under the planetary motion mode as the research mathematical model to deeply explore the main problems in the following four directions:Study on CCOS polishing characteristics.The contents include CCOS processing process,Preston hypothesis,material removal principle and model analysis,and surface modification process of components to be processed.Optimization of the removal function.In this paper,the programming of processing path is analyzed from two types of chemokine method and time-sharing synthesis method,and the problem of edge effect is solved.Based on the relationship among the movement characteristics,process parameters and polishing effect of the workpiece,a set of optimum process parameters ratio of uniformity and densification of grinding track was obtained through the simulation analysis of dynamic track by MATLAB.Solution of resident time.Selected the matrix method as the research core,chose the constrained least squares method to surface shape error of root mean square RMS value as the optimization goal model is discussed,the iteration method as a forward selection method for solving dwell time,choose to use a truncated singular value method(TSVD)regular into for the solution,the method of reverse design of the simulation machining experiment,two kinds of method in solving the rationality of the dwell time issue.Introduction of experimental platform and analysis of experimental results.This paper introduces the SRIM-2017 ultra-precision double-sided polishing machine and its process software in detail,selects fused quartz glass for double-sided polishing experiment and examines the surface shape error after processing,analyzes the surface shape precision data before and after processing,and makes practical supplement to the overall polishing movement and verifies the practicability of the experimental equipment.