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정우철(W. C. Jung),최진화(J. W. Choi),최길운(G. W. Choi),김성민(S. M. Kim),조명우(M. W. Cho) 한국정밀공학회 2004 한국정밀공학회 학술발표대회 논문집 Vol.2004 No.10월
Intervertebral cages in the cervical spine have been advantage in spinal fusion to relieve low back pain. In this study the effects of an intervertebral cage insertion on a cervical spine functional spinal unit investigate and cage structural analysis using finite element method. Three-Dimensional finite element models to create computed tomography (CT) scan C3-C4, obtain healthy young male which 1-mm slice section.
Feedstock 종류에 따른 금속분말사출성형 유동특성 분석을 위한 실험적 연구
정우철(W. C. Jung),허영무(Y. M. Heo),신광호(K. H. Shin),윤길상(G. S. Yoon),장성호(S. H. Chang),이정원(J. W. Lee) 한국소성가공학회 2009 한국소성가공학회 학술대회 논문집 Vol.2009 No.10
In recently industry, with the miniaturization and high-precision of machine part, the development of mold manufacturing technology for mass production is accompanied by the development of new industrial field such as IT, NT and BT. The metal injection molding(MIM) process combines the well-known thermoplastic injection and powder metallurgy technologies to manufacture small parts for IT, NT, BT industrial. In this study, the bar type MIM mold with a 800um thickness is made for influence of feedstock material and injection parameter through an experiment.
Micro EDM을 이용한 Lab-on-a-chip금형의 미세 패턴 제작에 관한 연구
신봉철(B.C. Shin),김규복(K.B. Kim),조명우(M.W. Cho),정우철(W.C. Jung),허영무(Y.M. Heo) 한국소성가공학회 2010 금형가공 심포지엄 Vol.2010 No.11
Recently, analyzing system is studying for applying to biomedical engineering field, actively. Micro fluidics control system has been manufactured using LIGA(Lithographie Galvanoforming and Abforming), Etching, Lithography, and Laser etc. However it is difficult to apply to precision mold master fabrication, efficiently because of long processing time and rising cost of equipments. Therefore, in this study, micro EDM and micro WEDG system were developed to analyze machining characteristics and its efficiency due to tool wear, surface roughness, and process time. Then, optimal machining conditions could be obtained from the analysis. As the results, staggered herringbone mixer which has a high mixing efficiency, one of passive mixer of Lab-on-a-chip, could be fabricated its micro pattern(<50um) of mold master successfully.