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임성곤(S. G. Lim),강신우(S. W. Kang),박건형(G. H. Park),김성환(S. H. Kim) 한국소성가공학회 2012 한국소성가공학회 학술대회 논문집 Vol.2012 No.5
The forging of magnesium is restricted to a few industries that aerospace parts. As increasing interests in the environment and enforcing strong regulations on exhaust gases and carbon dioxide in developed countries, efforts into developments in magnesium forging techniques have been making more briskly with transportation machine maker as the center. In particular, growing demands for a fuel-efficient vehicle, various efforts into lightweight of parts are putting forth. In this work, high strength commercial AZ80 and ZK60 Magnesium Alloys were forged in order to observe the changes in characteristics to the process. Changing variable forging temperature and forging speed of magnesium feedstock, magnesium control arms for chassis component were manufactured. Carrying out different heat treatments (T4 and T6), the changes in characteristics were investigated.
김우진 ( W. J. Kim ),김승빈 ( S. B. Kim ),김민재 ( M. J. Kim ),김민재 ( M. J. Kim ),김성환 ( S. H. Kim ) 한국정보처리학회 2022 한국정보처리학회 학술대회논문집 Vol.29 No.2
본 연구는 머신러닝의 한 종류인 YOLOv5를 이용하여 기존 육안 선별작업을 자동화 하는 기계를 설계하는 것이다. 본 연구에서는 영상촬영과 선별작업을 진행하는 컨베이어 기구와 선별 프로그램을 제작하고, 모든 표면을 검사해 사과의 품질을 3단계로 구별하는 작업을 진행하였다. 결과적으로 투입된 사과의 품질을 성공적으로 분류 하였다.
김성환(S. H. Kim),허민웅(M. W. Heo),박원규(W. G. Park),정성해(S. H. Jung) 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.5
A solver for icing and condensation of water has been developed. The phase change process was solved by the enthalpy method. For the code validation, the temperature and the phase change from water to ice of the driven cavity were calculated. Also, the melting process of the frost on the windshield glass of an automobile has been simulated. The calculation showed a good agreement with analytical solution and other numerical results. Using the present validated code, the condensation of water vapor has been first tried. The computed results provided some physical features of condensation phenomena even though experimental data and other numerical data were not available. For future work, it is recommended to throughly investigate the effects of boundary conditions on the solution.