| dc.description.abstract | The study is on the spiral polishing of the inner wall of bores through abrasive flow by means of the grinding materials of silicon carbide and magnetic hot melt particles, propelled by a spiral spindle and a circular neodymiμm magnet around the work piece. The neodymiμm magnet functioned as driving the magnetic hot melt particles and forcing the silicon carbide to polish the inner surface of bores. In the experiment, the factors investigated included the effects upon working temperature, abrasive viscosity, surface roughness, material removal by controlling magnetic flux density, size of silicon carbide particles, weight of silicon carbide particles, weight of magnetic hot melt particles, silicone oil viscosity, spindle rotation speed, machining time, and machining gap. In addition, sets of polishing parameters on the polished surface were examined to find the best parameter setting.
The result of the experiment suggested that with the increase of machining time, the liquidity of abrasive rose, and a more ideal polishing effect could be achieved. Based on the results, the best polishing effect might be obtained through the use of a 90mT neodymiμm magnet, 22μm SiC particles, 120 grams of SiC particles, 2000mm2/s viscosity of silicone oil, 4000rpm rotation speed, and a 6mm-machining gap. The surface roughness was effectively improved from Ra 0.9μm to Ra 0.094μm.
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