| Summary: | 碩士 === 健行科技大學 === 機械工程系碩士班 === 106 === Magnetic abrasive finishing (MAF) is a high-precision polishing method using the magnetic force to restrict the abrasive gels. However, the magnetic force of abrasive particles will drop when polishing non-conductive material such as SUS304 stainless steel tube. Moreover, the abrasive particles will be moved off the surface of machining area due to the centrifugal force of rotation, and reduce the stability of polishing. Therefore, this study developed a drum-type magnetic polishing machine to allow the abrasive particles performed tumbling and rotating motions, such as in a drum-type washing machine. Beside, the manual wheel was adopted to change the horizontal inclination of the machine to compare the polishing efficiency of different processing angles. Moreover, the processing of rotating objects for the drum, powerful magnets and workpieces, a homemade fixture to binding the abrasive and fixed, so that the process of relative motion. The experimental process will be matched with different processing parameters to explore the surface roughness and material removal changes. The experimental results show that the application of drum-type magnetic polishing machine to polish SUS304 stainless steel after 5 minutes, the value of surface roughness can be reduced from 0.2878 μm Ra to 0.0710 μm Ra. Relatively, the value of surface roughness only reduced from 0.26 μm Ra to 0.18 μm Ra regarding a traditional reciprocating magnetic polishing machine. Finally, the results indicate that the processing efficiency of a drum-type magnetic polishing machine about 2.7 times than the traditional magnetic polishing machine. It is confirmed the development of the drum-type magnetic polishing machine and its fixture has a very excellent polishing effect to polish non-conductive material such as SUS304 stainless steel tube.
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