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물리적 모델링을 이용한 이종금속 압연 두께 변화 거동 연구
이철환(C. H. Lee),신은경(E. K. Shin),주병돈(B. D. Joo),한상욱(S. W. Han),문영훈(Y. H. Moon) 한국소성가공학회 2013 한국소성가공학회 학술대회 논문집 Vol.2013 No.5
The deformation characteristics of double layered sheet during rolling with various process parameters were studied by physical modeling technique. Physical modeling simulates metal forming operations by using a model workpiece under conditions similar to those in actual production. The effects of process parameters, such as total reduction ratio, initial thickness ratio and differential speed ratio on the rolling characteristics were the primary focus of the investigation. From the results, the effect of the process parameters on the rolling of the double layered sheet has been determined.
바이메탈-슬래브의 평판 압연시 판 휨 거동 분석 및 수식모델 개발
이철환(C. H. Lee),황태우(T. W. Hwang),지원종(W. J. Ji),문영훈(Y. H. Moon) 한국소성가공학회 2014 한국소성가공학회 학술대회 논문집 Vol.2014 No.5
The warping behavior of bimetal-slab during flat rolling process are characterized in this study. An analytical model that can predict warping amount in bimetal-slab rolling is proposed on the basis of bending effect due to the related mismatch of longitudinal elongation during flat rolling. The warping model focuses on the mismatch of length-wise elongation due to the difference of deformation resistances between constituent materials of bimetallic-slab. Using this analytical model, the warping behavior of the bimetal-slab during rolling process at various processing parameters, such as initial thickness ratio and rolling reduction were studied. For the validation of analytical model, flat rolling operations by using Al1050/Al6061 bimetal-slab produced by continuous clad casting has been performed. The deformation characteristics of bimetal-slab during rolling process were also validated by finite element analysis using a commercial finite element code, FORGE™. From this study, the warping behaviors of bimetal-slab during flat rolling have been reliably characterized.