内凹面磁流变槽路抛光方法的研究  

Study of magnetorheological slot polishing method for concave surface

作　　者：左巍[1] 张云[1] 辛科[1] 冯之敬[1] 赵广木[1] 

机构地区：[1]清华大学精仪系,北京100084

出　　处：《光学技术》2010年第1期3-6,共4页Optical Technique

基　　金：国家自然科学基金资助项目(50675116)

摘　　要：针对高陡度非球面光学元件的内凹面抛光难题,提出了一种内凹面磁流变槽路抛光方法。设计与待加工内凹面形状匹配的凸模,并在凸模上开出供磁流变液循环通过的槽路,当磁流变液经过设有磁场的区域时发生流变作用形成柔性抛光磨头对内凹面产生材料去除作用。通过工件的旋转和外部磁极的移动完成对整个内凹面的抛光加工。建立了实验平台并开展了相关初步实验和分析。结果表明该方法能够适应内凹面抛光加工的需要,可获得较高表面质量,具有一定的可行性和应用潜力。A novel magnetorheological slot polishing method based on magnetorheological finishing is proposed to solve the problem of conformal concave surface polishing.The magnetorheological fluids flow through the slot cut on the mandrel which conforms to the concave surface.Rheologic phenomenon occurs where the magnetic field is applied and a flexible polishing lap is formed to smooth the concave surface.The entire concave surface can be finished by combining the rotation of the workpiece with the movement of the magnetic pole.A prototype apparatus is established and the preliminary experiments are carried out.The result illustrates the method has the potential for concave polishing with nanoscale roughness.

关 键 词：高陡度非球面 长径比 磁流变抛光 内凹面抛光 

分 类 号：TH706[机械工程—仪器科学与技术]