Abstract: Aiming at the problems of surface damage and low processing efficiency in traditional processing technology, the extremely promising surface contact ultraprecision magnetorheological polishing technology was applied to 3C manufacturing industry. The morphology of the polishing pad in the process of cylindrical permanent magnet magnetorheological polishing head was studied and analyzed. It was found that the cylindrical permanent magnet magnetorheological polishing head has a “ring effect” during processing. The “ring effect” was structurally designed for the cylindrical permanent magnet magnetorheological polishing head and its design concept was analyzed. The singlefactor polishing experiment was carried out on the 6061 Aluminum alloy workpiece by the cylindrical permanent magnet polishing head, and the optimal parameters were obtained by single factor experiment. The results indicate that the cylindrical permanent magnet magnetorheological polishing head can realize highefficiency smooth flat processing of the annular processing area, the surface roughness of the workpiece reaches 52 nm, and the material removal rate reaches 9.1 μm/min, which greatly improves the magnetorheological polishing. The efficiency provides an highefficient processing method for the fabrication of ultrasmooth surfaces with micronlevel accuracy.
Key words: cylindrical permanent magnet; surface contact; ultraprecision magnetorheological polishing; annular effect; highefficiency smooth flat processing