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이현민(H. M. Lee),구자경(J. K. Ku),노학곤(H. G. Noh),송우진(W. J. Song),구태완(T. W. Ku),강범수(B. S. Kang),김정(J. Kim) 한국소성가공학회 2009 한국소성가공학회 학술대회 논문집 Vol.2009 No.10
Electromagnetic forming(EMF) is a high-velocity forming process which uses electromagnetic Lorentz force. Advantage of this forming technique are improved formability, reduction in wrinkling, non-contact forming and applications of various forming process. But the application of electromagnetic forming technique is still limited in industry. Thus for continuous research and development of technique based on experiments, develop the forming equipment and carry out the forming experiments for validation of forming equipment.
하성찬(S. C. Heo),서영호(Y. H. Seo),박중원(J. W. Park),구태완(T. W. Ku),송우진(W. J. Song),김정(J. Kim),강범수(B. S. Kang) 한국소성가공학회 2009 한국소성가공학회 학술대회 논문집 Vol.2009 No.10
Flexible forming process for sheet metal using reconfigurable die is introduced based on numerical simulation. Numerical simulation of sheet metal forming process is carried out by using flexible dies model instead of conventional matched die set. Elastic cushion which has high resilience behavior from excessive deformation are inserted between forming punches and blank material for smoothing the forming surface which has discrete due to characteristics of the flexile die. As an elastic cushion, urethane pads are utilized using hyperelastic material model in the simulation. Formability in view of surface defect such as onset of dimple is compared with regard to various punch sizes. Consequently, it is confirmed that the flexible forming process for sheet material has appropriate capability and feasibility for manufacturing of smoothly curved surface instead of conventional die forming process.
박지우(J. W. Park),서영호(Y. H. Seo),허성찬(S. C. Heo),송우진(W. J. Song),구태완(T. W. Ku),강범수(B. S. Kang) 한국소성가공학회 2011 한국소성가공학회 학술대회 논문집 Vol.2011 No.10
In recent years, an interest for atypical structures has been increased because of the culture which is emphasized on personality than uniformity. Flexible Forming Technology has no fixed types about punches and dies, so it is easy to do forming about various shapes of structures. In this paper, it chooses one model of atypical configuration and carries out the forming simulation by using the finite-element method about the chosen model. Finally, based on the result it compares the result of the last simulation model with the objective surface, and confirms its suitablity.
유한요소해석을 이용한 EGL 도금조 Polisher Brush의 마모예측
구자경(J. K. Ku),노학곤(H. G. Noh),허성찬(S. C. Heo),송우진(W. J. Song),구태완(T. W. Ku),김정(J. Kim),강범수(B. S. Kang) 한국소성가공학회 2009 한국소성가공학회 학술대회 논문집 Vol.2009 No.10
Electro galvanized steel is electroplated cold roller steel for improving corrosion resistance and paintability, and is widely used in automobiles and home appliances. In the electroplating line for manufacturing electro galvanized steel if plating process is carried out with impurity on conductor roll surface, the defects in manufacturing process occurs because of steel fault. For quality, polishing is always required to separate impurity on surface of conductor roll. In this study, finite element analysis of wear for polisher brush is carried out for replaced time of it.