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초음파를 이용한 CVD-SiC 미세 홀 가공기술에 관한 연구
허찬(Chan Hur),채승수(Seung-Su Chae),이충석(Choong-Seok Lee),김택수(Taeck-Soo Kim),이종찬(Jong-Chan Lee) 한국기계가공학회 2007 한국기계가공학회 춘추계학술대회 논문집 Vol.2007 No.-
The ultra-sonic technology has been developed along with development of the IT industry that needs precision parts in semiconductors, aerospac, PDP, LCD and automobile. The application of ultra-sonic vibration is one of the most useful solution in dealing with problems of chipping and cracks during the machining of brittle and difficult-to-cut materials. This study is about machining technology of micro drilling for CVD-SiC using ultra-sonic machining. The experiments of the ultra-sonic machining, in which abrasive particles in slurry with water are presented to the work surface in the presence of an ultra-sonic vibrating tool, were carried out under various normal forces from 5N to 20N. The experimental results show that the ultra-sonic machining technology can be effectively utilized in micro drilling of CVD-SiC
IT 부품용 마그네슘 합금의 고속 탭핑가공에 관한 연구
이상민(Sang-Min Lee),박휘근(Hwi-Keun Park),이원석(Won-Seok Lee),김택수(Taeck-Su Kim),채승수(Seung-Soo Chae),이충석(Choong-Seok Lee),백영종(Young-Jong Baek),조현택(Hyun-Taek Jo),이영식(Young-Sik Lee),이종찬(Jong-Chan Lee) 한국기계가공학회 2012 한국기계가공학회지 Vol.11 No.3
This paper reports some experimental results in high speed rigid tapping of magnesium alloy(AZ91D). M3 spiral tap and high speed spindle tapping center of gantry type were used in experiments and thrust forces were measured. The experimental results indicate that the thrust forces are proportional to the spindle speed and depth of cut. The thrust forces increase as the depth of cut increases. M3 Tapping was achieved at the spindle speed of 10,000rpm, depth of cut of 1.5D and total stroke of 32mm.