Papers by Author: Wei Chan Chen

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.

Abstract: This study investigates a spiral polishing mechanism in polishing the inner wall of stainless bore with the mixture grinding material of silicon carbide and polystyrene. The delicate polishing process is verified to be more efficient, cost-saving, and environment friendly than traditional processes. Varied sets of polishing parameters, including SiC grain size, SiC weight, polystyrene(PS) weight, viscosity of silicon oil, revolution speed of the driving screw, and machining time, are examined through the Taguchi Methods for optimum polishing effects. Impacts of different combinations of the six polishing parameters on surface roughness and texture are probed into and analyzed in the process of the experiment. The findings suggest that with the increase of time, the fluidity and stickiness of the abrasive medium improve, resulting in a finer polished surface within delicate spiral polishing process. It appears that significant differences are observed through the use of a mixture of 60 grams of SiC (with size of 7 μm) and 70 grams of polystyrene, silicon oil of 1000 mm2/s viscosity under the speed of 3500 rpm screw revolution speed for 30-minute machining time, improving the surface roughness from 0.90 μm to 0.158 μm Ra. The finding thus lends support to the effect of spiral polishing mechanism, which can be further developed.