具有公自转运动形式的可更新磁流变抛光工具  

Renewable magnetorheological finishing tool combined self-rotation and co-rotation movement

作　　者：王飞[1] 冯之敬[1] 程灏波[1] 

机构地区：[1]清华大学精密仪器与机械学系,北京100084

出　　处：《清华大学学报（自然科学版）》2006年第2期184-186,共3页Journal of Tsinghua University(Science and Technology)

基　　金：国家"八六三"高技术项目(2001AA421140);国家自然科学基金资助项目(50175062)

摘　　要：在光学自由曲面的成形抛光加工当中,加工去除的稳定性对工件加工质量具有重要的影响,而抛光液的更新是保证去除稳定的关键。该文提出了一种具有公自转运动形式的可更新磁流变抛光工具,能够完成磁流变抛光液内部磁链的重组更新,使得加工去除稳定。针对此抛光工具,使用刚体润滑理论获得理论去除轮廓,通过实验获得其在单自转状态下的去除轮廓,与理论分析吻合。峰值去除量时间的实验表明,该抛光头的去除效果受时间的影响很小,抛光去除稳定。The removal stability has an important effect on the surface accuracy during fine polishing of freeform optical surfaces and the polishing fluids must be renewed to safeguard the stability. This paper presents a polishing tool that combines self-rotation movement with co-rotation while renewing the polishing fluids. This tool maintains removal stability by renewing and combining the magnetic chains in the polishing fluids. The theoretical removal profile predicted using the lubrication theory of rigid bodies agrees well with experimental results. The variation of the peak removal rate over time shows that the polishing continues to be stable over time. A stable removal rate is the precondition for highly accurate magnetorheological finishing.

关 键 词：光学加工 磁链重组 磁流变抛光 稳定去除 

分 类 号：TH162[机械工程—机械制造及自动化]