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3D-FEM 을 이용한 후판하우징의 피로안정성에 대한 연구
문창호(C. H. Moon),서재형(J. H. Seo),고성현(S. H. Ko),천명식(M.S.Chun),박해두(H. D. Park) 한국소성가공학회 2009 압연 심포지엄 Vol.2009 No.4
The purpose o f this study is to investigate the fatigue safety and deformation of housing in plate rolling process. For this, we carried out 3-dimensional FEM analysis for housing considering design variations of housing structure. It showed that the housing with rounds under a column is benefits to control thickness accuracy of rolled material, due to smaller elastic deformation and maximum effective stress. Also, we calculated the fatigue safety factors, the ratios of the pulsating equivalent fatigue limit to the maximum tensile stresses analyzed using the equipment force and normal rolling force.
사이징 프레스에서 폭 압하 공정중 결함 감소를 위한 엔빌의 형상설계
이상호(S. H. Lee),김동환(D. H. Kim),변상민(S. M. Byon),박해두(H. D. Park),김병민(B. M. Kim) 한국정밀공학회 2006 한국정밀공학회 학술발표대회 논문집 Vol.2006 No.5월
Generally, the vertical roll process is used to achieve extensive width reduction in hot strip mill. However, it is difficult to avoid the defects such as dog-bone and seam-defect. The sizing press has been developed in response to the defects mentioned above. Especially, this study is carried out to investigate the deformation of slab by two-step sizing press. The deformation behavior in the width sizing process is more favorable than that in conventional vertical rolling edger. The objective of this study is to determine the optimal anvil shape parameters in the sizing press with two-step die from the viewpoint of edge-seam length. In general, the edge-seam defect occurs parallel to the rolling direction at both edges in horizontal rolling process after sizing press. The optimal combination of the parameters is determined by FE-simulation and Artificial Neural Network (ANN). The slab deformation in sizing press with convex anvil is analyzed by FE-simulation. The most suitable profile of the anvil is also discussed for the improvement of trimming loss because of the side seam defect by FE-simulation and ANN.