학술지명: Precision Engineering
발행국가: 미국
발표일자: 2020년 2월
SCI여부 : SCIE
원문Link: https://www.sciencedirect.com/science/article/pii/S0141635919307469?casa_token=KdxnV5bwZxsAAAAA:6sVQE3k_LRawqEUN8If5n7lujeMC2iD22XFmSsttR0C52fcPSyd7cjapBMaHlGLD2JBPmx5vU9NB
제목: Experimental investigation on CO2 laser-assisted micro-slot milling characteristics of borosilicate glass
저자: 김태겸(삼성전자) 권귀감(서울대학교) 주종남(서울대학교) 송기영(샤프정밀)
내용: 레이져의 열에너지를 이용하여 유리를 엔드밀로 절삭가공함
초록Abstract: Demands for micro-machining on glass have been increasing in various industries due to the unique properties of glass, such as transparency or biocompatibility. However, micro-channel fabrication on glass with high precision has been challenging due to its brittle characteristics. This research presents the CO2 laser-assisted micro-milling process and investigates the machining characteristics experimentally. Micro-channels without cracks were fabricated using micro-end mill and CO2 laser irradiation as an assisting heat source. Compared to the process without laser heating in the same matching conditions, the average surface roughness was reduced by 96%, and cutting force was reduced by 28% and 66% for the feed and thrust direction, respectively. Continuous and sheared chips were observed with laser heating, indicating the process is in ductile-regime machining. Through the investigation of machining parameters, it was found that micro-channels with low average surface roughness can be achieved at the proper laser power when the workpiece is heated up to the strain point at tool position, at low feed rate, and at high axial depth of cut, as long as the tool withstands the cutting forces. Consequently, it can be concluded that it is possible to increase the material removal rate in micro-milling of borosilicate glass with high quality by using the CO2 laser, which was found to be an effective and suitable heating method.
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