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물리적 모델링과 FE해석을 이용한 링 롤링 공정에서의 최적소재치수 예측
남윤건(Y. G. Nam),이호진(H. J. Lee),김태옥(T. O. Kim),이진모(J. M. Lee),문영훈(Y. H. Moon) 한국소성가공학회 2010 한국소성가공학회 학술대회 논문집 Vol.2010 No.10
The ring rolling design includes geometry design and optimization of process variables. In ring rolling, the finished ring dimensions include both the cross-sectional shape and the diameter. Therefore, the blank volume assumes would alter the final product dimensions, because the volume remains unchanged during the rolling operation. So, it is significant to design initial blank sizes. In this study, optimized dimension of blank was predicted by using FEM analysis and physical modeling experiment with lead-based was used. A commercial FEM code, Forge2008 was used to simulate the effect of various blank sizes.
상계해석법을 이용한 링 롤링 공정에서의 블랭크 치수 최적화에 관한 연구
남윤건(Y. G. Nam),이호진(H. J. Lee),전찬후(C. H. Jeon),문영훈(Y. H. Moon) 한국소성가공학회 2012 한국소성가공학회 학술대회 논문집 Vol.2012 No.5
The ring rolling process is widely used in the manufacturing of seamless rings. It is a metal forming process that reduces the thickness (cross section) and enlarges the diameter (circumference) of the blank. The main problems in the state of the increasing demands for the ring roiling products are the excessive loss of materials and the long postprocessing time due to the low dimensional accuracy. To solve these problems, it is necessary to predict the blank dimension which is optimized for dimensional requirements. Among various methods of forming processes, the upper bound technique is practical approach for theoretical analysis of metal forming processes. In this study, an upper bound analysis is obtained to predict the optimized blank dimension of ring roiling process.