| Summary: | 碩士 === 國立中央大學 === 機械工程研究所 === 99 === The normal vibration directions of vibration-assisted magnetic abrasive finishing are all parallel or perpendicular to the surface of workpiece. It’s shortcomings are easily lead to more scratches on the surface, and difficult to obtain mirror effect.
This study break through previous studies,design a mechanism of two-dimensional(XY plane) vibration assisted to magnetic abrasive finishing. In the study we will use the steel particles and SiC abrasive mixture composed of non-associative with a vibration-assisted magnetic abrasive finishing, then use the polishing pad with vibration-assisted, watch the SEM surface and surface roughness.
Taguchi experiment can verify that, for the improvement of surface roughness parameters for the best: X Axis Frequency 1Hz, SiC weight of 2g, Grit weight 3.5g, slurry weight 3g, vibration platform speed 1500rpm, Vibration Amplitude 0.9mm, Grit numbers # 120, pole speed of 550rpm（A2B2C2D3E3F3G3H2）.And proved vibration assisted magnetic abrasive finishing method in the best parameter combinations, can effectively improve within 5 minutes of stainless steel surface roughness by the Ra0.14μm down to 0.03μm, to improve the rate of 78.57%, ground 25 minutes later more up to Ra0. 02μm, the surface to improve the rate increased to 85.71%.
Then study to abrasive ratio, we got when slurry weight 3g, increase SiC weight 1g and diamond powder 1g, the surface roughness will get better. Can effectively improve within 5 minutes of stainless steel surface roughness by the Ra0.14μm down to 0.025μm, ground 25 minutes later more up to Ra0. 01μm, and get outstanding results in mirror effect. Use this abrasive ratio to polishing the rough stainless steel,can effectively improve within 5 minutes of stainless steel surface roughness by the Ra0.23μm down to 0.02μm, ground 25 minutes later more up to Ra0. 01μm, Show the best abrasive ratio have excellent improve capacity in surface roughness.
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