Magnetorheological polishing apparatus for diamagnetic material based on permanent magnets
                                                                CHEN Xi, MA Zhongxin, CHENG Xinlong
                                   (Automotive Institute， Anyang Vocational and Technical College, Anyang 455000, China)

Abstract: Aiming at the problems of existing magnetorheological polishing technology, such as difficult to improve the machining accuracy and difficult to control the polishing heat in the process, etc. the magnetorheological polishing process and the magnetic flux density of workpiece gap in the polishing process of diamagnetic materials were studied, the surface model of permanent magnet polishing tool tip and the surface relationship of copper alloy workpiece were summarized. A permanent magnet based magnetorheological finishing method for diamagnetic materials was proposed, the magnetic flux density in the working gap of the polishing device was simulated by Maxwell. The experimental indicate that, the polishing cutter composed of permanent magnets is used to resist the processing of magnetic materials such as copper and alloy,based on the magnetorheological polishing fluid, the surface quality of the workpiece is improved obviously, and the machining accuracy of nanometer level is realized.

Key words: magnetorheological; polishing apparatus; diamagnetic material; surface roughness