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전해방전 가공 시 방전 피크의 제어를 통한 유리의 미세 가공성 향상에 관한 연구
장인배(I. B. Chang),김남혁(N. H. Kim),김대용(D. Y. Kim),김병희(B. H. Kim),김헌영(H. Y. Kim) 대한기계학회 2002 대한기계학회 춘추학술대회 Vol.2002 No.5
Electrochemical discharge machining is a very recent technique for non-conducting materials such as<br/> ceramics and glasses. ECDM is conducted in the NaOH solution and the cathode electrode is separated from<br/> the solution by H2 gas bubble. Then the discharge is appeared and the non-conductive material is removed by<br/> spark and some chemical reactions. In the ECDM technology, the H2 bubble control is the most important<br/> factor to stabilize the discharging condition. In this paper, we proposed the discharge peak monitoring/<br/> discharging duty feedback algorithms for the discharge stabilization and the feasibility of this algorithm is<br/> verified by various pattern machining in the constant preload conditions for the cathode electrode.
김병희(B. H. KIM),전성건(S. K. JEON),남권선(K. S. NAM),김헌영(H. Y. KIM),전병희(B. H. JEON) 한국생산제조학회 2004 한국생산제조시스템학회 학술발표대회 논문집 Vol.2004 No.4
Ultrasonic machining is effective for machining of extreme hard and brittle materials, including glass, ceramic, carbide, graphite. The major machining principle involves the direct hammering as well as the impact of abrasive particles on the workpiece. Also, it involve cavitation erosion. The general workpiece is flat side. This study attempted micro hole machining of a curved surface of glass tube. Ultrasonic machining is fault of the slow machining speed. An experiment does and got 16 seconds validity machining time as increasing the processing speed. Moreover, entrance crack and sur face roughness was similar both machining speed is slow and fast. Several micro hole of glass tube machined using one micro tool, but tool wear is infinitesimal.