http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
공학기술교육인증 프로그램의 효과적인 운영 사례에 관한 연구
이연신(Youn-Sin Lee),한재호(Jae-ho Han),김항우(Hang-Woo Kim) 한국공학교육학회 2016 공학교육연구 Vol.19 No.2
An engineering educational servery for graduating seniors had been conducted in Songwon University to improve engineering program objectives. The analysis results show that the current engineering educational objectives need to be modified to satisfy the ABEEK accredited criteria and engineering curriculum returning is necessary to include more design courses.
이연신(Youn-Sin Lee)김항우(Hang-Woo Kim),한재호(Jae-Ho Han) 한국공학교육학회 2012 공학교육연구 Vol.15 No.6
In this paper, we present, based on a systematic job analysis, the definition, flowchart and description of Ship Building & Ocean Engineering Technician’s job in Ship Building & Ocean Engineering Industry for developing an Ship Building & Ocean Engineering education and training program in the context of Korea situation. In addition, it is suggested that the courses be directed toward job site-centered reform through conducting job analysis with experts in the environmental industry. serving new courses demanded by industries in practice and providing training programs for industries.
장훈(Jang Hun),성백섭(Back-Sub Sung),차용훈(Yong-Hoon Cha),김덕중(Duck-joong Kim),이연신(Youn-sin Lee) 한국생산제조학회 2005 한국생산제조시스템학회 학술발표대회 논문집 Vol.2005 No.5
In the super slow speed die casting process, the casting defects due to melt flow should be controlled in order to obtain sound casting products. The casting defects that are caused by molten metal were cold shut formation, entrapment of air, gas, and inclusion. But the control of casting defects has been based on the experience of the foundry engineers. The calculation of simulation can produce very useful and important results. The calculation data of die casting process condition from the computer simulation by the Z-CAST is made to insure that the liquid metal is injected at the right velocity range and that the filling time is small enough to prevent premature solidification. The parameters of runner shape that affected on the optimized conditions that was calculated with simple equation were investigated. These die casting process control techniques of automobile valve body mid-plate have achieved good agreement with the experimental data of tensile strength, hardness test, and material structure photographies satisfactory results.
정밀주조 다이캐스팅을 이용한 자동차 레귤레이터 하우징 성형해석에 관한 연구
성백섭(Back-Sub Sung),김미애(Mi-Ae Kim),차용훈(Yong-Hoon Cha),김정대(Jung-Dae Kim),김덕중(Duck-Joong Kim),이연신(Youn-Sin Lee) 한국생산제조학회 2006 한국공작기계학회 춘계학술대회논문집 Vol.2006 No.-
The casting defects that are caused by molten metal were cold shut formation, entrapment of air, gas, and inclusion. But the control of casting defects has been based on the experience of the foundry engineers. In this thesis, the computer simulation analyzed the flow of molten metal. The quantitative analyses which proposed the effective mold design was executed Flow patterns of 0.1-0.16㎧ molten metal in 15㎜ thin plate casting were investigated in order to optimize die-casting process. As increasing ingate velocity in thin plate casting, cold shot was decreased. The parameters of runner shape that affected on the optimized conditions that was calculated with simple equation were investigated. These die casting process control techniques of automobile regulator housing parts have achieved good agreement with the experimental data of tensile strength, hardness test, and material structure photographies satisfactory results.
자동차 부품 소재 개발에 따른 캐스팅 과정의 부품 내부온도 거동에 관한 연구
차용훈(Cha Young-Hoon),성백섭(Sung Back-Sub),장훈(Jang Hoon),김미애(Mi-ai kim),김정대(jung-Dae Kim),김선진(Sun-jun Kim),김덕중(Duck-joong Kim),이연신(Youn-sin Lee) 한국정밀공학회 2005 한국정밀공학회 학술발표대회 논문집 Vol.2005 No.10월
The casting defects that are caused by molten metal were cold shut formation, entrapment of air, gas, and inclusion. But the control of casting defects has been based on the experience of the foundry engineers. In this thesis, the computer simulation analyzed the flow of molten metal. The quantitative analyses which proposed the effective mold design was executed Flow patterns of 0.15-0.16m/s molten metal in 15 mm thin plate casting were investigated in order to optimize die-casting process. As increasing ingate velocity in thin plate casting, cold shot was decreased. The parameters of runner shape that affected on the optimized conditions that was calculated with simple equation were investigated. These die casting process control techniques of automobile valve body mid-plate have achieved good agreement with the experimental data of tensile strength, hardness test, and material structure photographies satisfactory results.