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박병진(B. J. Park),김보현(B. H. Kim),주종남(C. N. Chu) 한국정밀공학회 2005 한국정밀공학회 학술발표대회 논문집 Vol.2005 No.10월
In the micro electrochemical machining (MECM) using ultra short pulses, the machining rate is closely related to the tool electrode area. The machining rate varies according to the machining depth or the immersion depth. When using insulated tool electrodes, those depths do not matter. In addition, micro structures with high machining depth can be fabricated because the machining characteristics do not vary with the machining depth. Another advantage of insulated electrodes is prevention of taper shape. Micro structures with high machining depth or high aspect ratio were fabricated using insulated tool electrodes.
장옥배(O.B.Chang),노갑철(K.C.Ro),이인홍(I.H. Lee),박병진(B.J.Park),박홍서(H.S.Park) 한국정보과학회 1988 한국정보과학회 학술발표논문집 Vol.15 No.1
본 논문은 ICAI(Intelligent Computer Assisted Instruction)의 구성 요소와 특징을 고찰하고, 고찰된 이론하에서 기존의 ICAI의 단점을 찾아내어, 그에 대한 문제점을 해결할 수 있은 설계상의 환경을 제시하므로서, ICAI를 모델을 설계할 수 있는 방안을 마련하는데 있다.
남호성(H. S. Nam),박병진(B. J. Park),김보현(B. H. Kim),주종남(C. N. Chu) 한국정밀공학회 2005 한국정밀공학회 학술발표대회 논문집 Vol.2005 No.10월
The dissolution characteristic of metal shows the different tendency according to the applied electrical potential, the kind of electrolyte and pH value, etc. In the micro electrochemical machining (ECM), unfavorable oxide/passive layer formation and overall corrosion of electrodes must be prevented. The anodic polarization curve of nickel has distinct three dissolution regions, i.e. two active regions and the transpassive dissolution region. In this paper, the stable electrode potentials of workpiece and tool were determined in sulfuric acid and hydrochloric acid solution, respectively. In each solution, different machining property was shown and possible electrochemical reactions were discussed. On the basis of this experiment, the methodology to obtain the proper electrode potential was suggested.
김보현,박병진,주종남 한국공작기계학회 2005 한국공작기계학회 춘계학술대회논문집 Vol.2005 No.-
For micro electrochemical machining (ECM), tool electrodes with various sizes and shapes are necessary. In this paper, tool electrodes were fabricated by micro electrical discharge machining (EDM). Electrode material is tungsten carbide which has high rigidity and good conductivity for micro electrochemical machining. Disk-type and sphere-type electrodes were fabricated to prevent taper shape of side walls or to produce spherical features. Various 3D micro structures were fabricated by electrochemical milling with developed electrodes.