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김영복(Young Bok Kim),이의삼(Wee Sam Lee),한승헌(Seung Heon Han),이동길(Dong Kil Lee),이준기(June Key Lee) 한국생산제조학회 2021 한국생산제조학회지 Vol.30 No.3
Machining experiments were conducted to improve the surface morphology of a microlens array using the raster milling method. Three types of raster milling methods were investigated in this study: parallel, tilted, and single-point raster milling. Further, the characteristics of the machined surfaces were analyzed. In parallel raster milling, hump formation on the machined surface was promoted by the tool’s run-out deviation. In tilted raster milling, tool marks occurred on the machined surfaces owing to tool wear. In single-point raster milling, wherein the tool axis rotated according to the lens curvature during machining, the form accuracy of peak-to-valley was confirmed to improve from 0.46 to 0.07 μm. Therefore, single-point raster milling was validated as a highly robust machining method because the surface morphology was rarely affected by tool errors.