确定性磁射流抛光技术  

Deterministic Magnetorheological Jet Polishing Technology

作　　者：戴一帆[1] 张学成[1] 李圣怡[1] 彭小强[1] 

机构地区：[1]国防科技大学机电工程与自动化学院,长沙410073

出　　处：《机械工程学报》2009年第5期171-176,共6页Journal of Mechanical Engineering

基　　金：国家自然科学基金(50775215);新世纪优秀人才支持计划资助项目

摘　　要：介绍一种新型的磁场辅助稳定射流的确定性精密抛光技术——磁射流抛光技术。磁射流抛光利用局部外加轴向磁场固化含有磨料的磁流变液射流束,产生准直的硬化射流束进行相对远距离的确定性精密抛光。介绍该工艺的工作原理,其次定性分析了聚束射流形成的原因,通过一系列试验验证了该工艺精密抛光深凹表面的可行性,还进行磁射流去除波纹度的试验研究,基于计算机控制光学表面成形技术进行去除函数的优化计算。试验结果表明磁射流集束性好,对于抛光距离不敏感,因此在高陡度的凹形光学零件和内腔等复杂形面的确定性精密抛光中具有潜在的独特优势。A new deterministic precision polishing technology of magnetic-assisted jet stabilization, magnetorheological jet polishing （MJP）, is introduced. In MJP, the jet of magnetorheological （MR） fluid containing abrasives is magnetized by an external local axial magnetic field and becomes a collimated and coherent hard jet, which can polish the surface placed at a relatively far distance in a deterministic process. The mechanism of MJP is introduced. The forming of collimated MR jet is analyzed qualitatively. A series of experiments are conducted to demonstrate the feasibility to polishing steep concave shapes. And the experiment to remove waveness by MJP is also done. The optimization of material removal function is investigated on the basis of the principles of computer controlled optical surfacing （CCOS）. The experimental results show that the collimated jet of MR fluid is insensitive to the offset distance and MJP can provide potential advantages to polishing steep concaves and parts with a variety of cavities in a deterministic process.

关 键 词：磁射流抛光 聚束射流 高陡度凹形零件 去除函数优化 

分 类 号：TH161[机械工程—机械制造及自动化]