40000-RPM 급 MAP 가공법을 이용한 인코넬 625 수소 니들밸브의 초정밀 가공 기술
Ultra-precision Polishing Technique of Inconel 625 Hydrogen Needle Valve via 40000-RPM Grade MAP Processing Method
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초록
In this study, the ultra-smooth surface of Inconel 625 workpieces were achieved by 40000-RPM grade magnetic abrasive polishing (MAP) process. This process created the high rotational speed of workpiece and the movement of magnetic pole to produce the polishing action of magnetic abrasive tools on the surface of Inconel 625 workpieces. The input parameters used in this experiment were selected as the rotational speed of workpiece (40000 rpm), movement of magnetic poles (Feed rate: 2 mm/sec), grain size of abrasive tool (PCD abrasive: 1- ㎛), magnetic poles (A-shape, B-shape, and C-shape) and the polishing times (0, 2, 4, 6, 8, 10, 12, 14 min). The results of this study showed that the smooth surface of Inconel 625 bar was achieved, which the surface roughness of Inconel 625 were significantly improved from 0.33 μm to 0.03 μm within 10 min of the polishing time via B-shape of magnetic poles. This can be confirmed that the 40000-RPM grade MAP processing method is an effective process to achieve high surface quality of Inconel 625 workpieces.
Abstract
In this study, the ultra-smooth surface of Inconel 625 workpieces were achieved by 40000-RPM grade magnetic abrasive polishing (MAP) process. This process created the high rotational speed of workpiece and the movement of magnetic pole to produce the polishing action of magnetic abrasive tools on the surface of Inconel 625 workpieces. The input parameters used in this experiment were selected as the rotational speed of workpiece (40000 rpm), movement of magnetic poles (Feed rate: 2 mm/sec), grain size of abrasive tool (PCD abrasive: 1- ㎛), magnetic poles (A-shape, B-shape, and C-shape) and the polishing times (0, 2, 4, 6, 8, 10, 12, 14 min). The results of this study showed that the smooth surface of Inconel 625 bar was achieved, which the surface roughness of Inconel 625 were significantly improved from 0.33 μm to 0.03 μm within 10 min of the polishing time via B-shape of magnetic poles. This can be confirmed that the 40000-RPM grade MAP processing method is an effective process to achieve high surface quality of Inconel 625 workpieces.