http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
유압펌프용 실린더 블록의 분말야금 성형공정의 3 차원 유한요소해석
조주현(J. H. Cho),권영삼(Y. S. Kwon),정성택(S. T. Chung),이민철(M. C. Lee),전만수(M. S. Jeon) 대한기계학회 2006 대한기계학회 춘추학술대회 Vol.2006 No.11
In this study, three-dimensional finite element analysis of a powder metallurgy compaction process is carried out to find an optimized process parameters for a complicated cylinder block of a hydraulic pump of a 22ton excavator. The commercial CAE S/W for powder metallurgy, PMsolver, is used to simulate the compaction process. The compaction process and its analysis information are introduced in detail. Finite element predictions are applied to improving the process design and compared with the experiments. It has been shown that the finite element predictions are quantitatively in good agreement with the experiments in terms of density distribution.
엄재근(J. G. Eom),정승원(S. W. Jeong),전만수(M. S. Jeon) 한국소성가공학회 2013 한국소성가공학회 학술대회 논문집 Vol.2013 No.5
In this paper, the metal flow lines in product design as well as in forging process design are emphasized with typical application examples. The prediction of metal flow lines using metal forming simulation technology is introduced with their characteristics. An experimental study shows that the metal flow lines have great influence on the structural rigidity of the product. We introduce various typical applications including the case of the severely cut metal flow lines during machining especially on the region where the periodically contacting forces are exerted, the case of abnormal distortion of metal flow lines which can cause the broken or ruined metal flow lines due to much elongation or hot shortness due to viscous heating and the case of the macrosegregation region which should be controlled not to be neighboring with the force bearing region. An example of weight reduction of an automobile part considering the improved metal flow lines is also introduced. These typical applications can give the process engineers the insight in conducting the automobile or mechanical parts design as well as in developing their related manufacturing processes.
엄재근(J. G. Eom),정재헌(J. H. Jung),이상욱(S. W. Lee),전만수(M. S. Jeon) 한국소성가공학회 2011 한국소성가공학회 학술대회 논문집 Vol.2011 No.10
In this paper, a two-stage plate forging process is simulated considering air trapping between workpiece and dies. A basic approach is introduced to deal with the air trapping. The volumetric strain of each cavity enclosed by the workpiece, a die and/or a plane of symmetry is traced and the pressure, a function of the volumetric strain and maximum normal stresses of the neighboring contact regions, is exerted in the surface of workpiece inside the cavity. Predictions are compared with experiments, showing that they are in good agreement with each other.