Abstract
The spiral polishing mechanism in the present experiment employed a turning screw rod to drive the SiC and the steel grits. With a powerful magnet set around the workpiece interacting with the steel grits, the SiC abrasives were driven and then achieve the surface’s polishing effects. The best parameters combination was discussed with the control of magnetic flux density, size and weight of SiC particles, weight of steel abrasives, viscosity of silicon oil, turning speed of spindle, as well as machining time and their influences on the surface roughness. The effects of each machining parameter on the appearance of workpiece surface were also studied. Based on the results of the experiment, with the increase of machining time, the fluidity of the abrasives becomes better, and thus higher quality of polishing surface could be expected after the process of precision spiral polishing. The results also showed that the best polishing surface was found when the magnet of magnetic flux density was controlled at 90mT, particle size at 12μm, 110g of SiC grams, 60 grams of polystyrene balls, silcon oil at 1000 mm2/s viscosity, and the screw revolution speed at 3500 rpm. The surface roughness was successfully improved from 0.9μm to 0.134μm.
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