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긴 단조품의 측방향 열간 단조공정 중 금형의 실용적 구조해석 기술에 관한 연구
김민철(M. C. Kim),엄재근(J. G. Eom),박건형(G. H. Park),강신길(S. G. Kang),정순종(S. J. Jung),전만수(M. S. Joun) 한국소성가공학회 2010 한국소성가공학회 학술대회 논문집 Vol.2010 No.5
In this paper, a useful two-dimensional finite element approach is applied to structural analysis of dies in hot lateral forging of long parts. Three-dimensional forging simulation and die structural analysis are conducted for an aluminum hot forging process of the front lower control arm of an automobile and their results are criticized in terms of application for improving designs of process or die. Two dimensional approach for engineering design is proposed especially for prediction of stress concentration with higher accuracy when the material is long compared to its diameter and it is applied to the process to solve the local problem. It is shown that the predictions of two dimensional approach is very close to those of three-dimensional approach if the velocity Component normal to the plane selected for two dimensional analysis is negligible.
엄재근(J. G. Eom),강신길(S. K. Kang),김진우(J. W. Kim),김민철(M. C. Kim),박건형(K. H. Park),정순종(S. J. Jung),이민철(M. C. Lee),전만수(M. S. Joun) 한국소성가공학회 2010 한국소성가공학회 학술대회 논문집 Vol.2010 No.10
In this paper, a sequence of compound metal forming processes composed of four roll forging processes, a bending process and two conventional closed die forging processes developed for manufacturing a lower arm with highest yield of material is simulated. The detailed process design is introduced with emphasis on the roll forging processes for manufacturing an optimized preform. The predictions are compared with the experiments and it is shown that they are in close agreement.