电磁流变效应微磨头抛光加工电磁协同作用机理  

Synergistic Effect of Electro-magnetically Coupled Field in Polishing with the EMR Effect-based Tiny-grinding Wheel

作　　者：路家斌[1] 阎秋生[1] 田虹[1] 高伟强[1] 

机构地区：[1]广东工业大学机电工程学院,广东广州510006

出　　处：《摩擦学学报》2010年第2期190-196,共7页Tribology

基　　金：国家自然科学基金(50575045;50875050);高等学校博士点学科专项科研基金(20060562005);广东省自然科学基金重点项目(9251009001000009)资助

摘　　要：将磨料混入以Fe3O4为分散粒子的电磁流变液作为抛光液,在电磁场耦合作用下形成电磁流变效应微磨头对玻璃材料进行抛光加工试验,通过考察不同电磁场耦合条件下玻璃材料的去除量,揭示了电磁流变效应微磨头抛光规律,建立了分散粒子的力学模型,深入研究了电磁流变效应微磨头抛光的电磁协同作用机理.结果表明:励磁电压为5V、电场电压3kV时,电磁流变效应微磨头材料去除量达到电流变效应微磨头的1.74倍和磁流变效应微磨头的5.71倍,产生了显著的电磁流变协同效应;电磁流变液分散粒子所受的电场力、磁场力和洛伦兹力产生的自旋力偶的综合作用决定了电磁流变效应微磨头链串的稳定性及其加工性能,在适当的电场和磁场耦合状态下能获得良好的电磁流变协同效应.Based on the electro-magneto-rheological（EMR）effect,the Fe3O4-based EMR fluid dispersed with micron-sized finishing abrasives is used as a polishing fluid to form a dynamical tiny-grinding wheel under electro-magnetically coupled field.Using this EMR effect-based tiny-grinding wheel,polishing experiments were conducted to investigate the material removal amount of normal glass under the different electro-magnetically coupled fields,and revealed the machining performance of the tiny-grinding wheel.A mechanical model of dispersed particles in the EMR fluid was presented based on the theoretical analysis of materialogy and electromagnetism,and the synergistic effect of the coupled field in polishing with the tiny-grinding wheel was investigated in detail.Experimental results indicated that the material removal amount of the EMR effect-based tiny-grinding wheel was 1.74 times that of the ER effect-based tiny-grinding wheel and 5.71 times that of the MR effect-based tiny-grinding wheel due to the marked synergistic effect of the coupled field.The combined effect of the electric field force,the magnetic field force and the spin couple generated by the Lorentz force determined the stability of the chains of EMR particles and the machining performance of the EMR effect-based tiny-grinding wheel,and a good synergistic effect of EMR fluid can be obtained under appropriate electro-magnetically coupled field.

关 键 词：电磁流变液 协同效应 微磨头 抛光 力学模型 

分 类 号：TG580.6[金属学及工艺—金属切削加工及机床]