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자동차 압축기용 마그네슘 합금 EL-cover 성형 공정 설계
김상우(S. W. Kim),이영선(Y. S. Lee),원종보(J. B. Won),임권수(K. S. Lim) 한국소성가공학회 2012 한국소성가공학회 학술대회 논문집 Vol.2012 No.5
Recently, the industrial applications of magnesium alloy have been increased because it is the lightest structural metal on Earth and has many advantages such as a high specific strength, excellent machinability, high electrical and thermal conductivity, etc. The efforts of the automobile industry to reduce fuel consumption by using lightweight structural materials have accelerated the development of magnesium alloy sheet forming technologies. In this work, in order to apply magnesium alloy to high-performance air-conditioning system for electric vehicles, three cases of multi-stage drawing processes for fabrication of the EL-cover part were designed and the forming failure for each case was investigated by the FEM combined with a ductile fracture criterion.
전동압축기를 이용한 하이브리드 차량 에어컨 시스템 최적 제어
박일영(Ilyoung Park),원종보(Jongbo Won),고현배(Hyunbae Goh),임권수(Kweonsoo Lim) 한국자동차공학회 2011 한국자동차공학회 부문종합 학술대회 Vol.2011 No.5
The concept of environmental conservation in Korea was newly established spreading awareness of air pollution caused by vehicle emissions and global warming. From this perspective, the popularization of environment-friendly vehicles such as electric and fuel-cell cars is poised to realize in the near future. A/C system for these vehicles needs to be operable independently due to installation in battery-powered vehicles. In response to these needs, we have developed electrical compressor with integrated inverter. In this paper, we study the optimization of performance and NVH using the characteristics of electrical compressor, independent operation, and the reduction of power consumption ultimately.
CFD 해석 및 시험을 통한 스크롤 압축기의 토출 부 냉매유로 최적화 설계
김홍민(Hongmin Kim),박일영(Ilyoung Park),손일국(Ilguk Son),임권수(Kweonsoo Lim) 한국자동차공학회 2011 한국자동차공학회 학술대회 및 전시회 Vol.2011 No.11
The purpose of A/C system in the vehicle is to have a driver comfortable by adjusting temperature and humidity. To increase this A/C system efficiency, it is good way to increase compressor’s performance. But, if compressor"s performance is increased with noise, it will not be good design. The purpose of this study is, by optimizing Rear Head’s refrigerant path, to increase compressor’s performance and decrease noise value in the vehicle. In this paper, to satisfy compressor’s performance and noise we conducted CFD analysis, performance test, pulsation test, bulk noise test and real car noise test. Through these experiments, we could design optimization discharge system of scroll compressor.
마그네슘 합금 EL-cover 부품 제조를 위한 딥 드로잉 공정 유한요소해석 및 실험
김상우(S. W. Kim),이영선(Y. S. Lee),원종보(J. B. Won),임권수(K. S. Lim) 한국소성가공학회 2012 한국소성가공학회 학술대회 논문집 Vol.2012 No.10
Recently, the application of magnesium alloy to automobile and electric parts have been increased because of its high specific strength, excellent machinability, high electrical and thermal conductivity. The efforts of automobile industry to reduce fuel consumption by using lightweight structural materials have accelerated the deep drawing technology of magnesium alloy sheet. In the present study, the basic study to fabricate a EL-cover part for automotive compressor have been carried out. The EL-cover which is manufactured by die casting process has been redesigned for the application of deep drawing process. Three cases of die shapes were designed and the forming failure for each case was predicted by the FEM combined with a ductile fracture criterion. The result was verified with experiment and shows a good agreement.
전동식 압축기 케이스 제조를 위한 3t Mg합금 판재 온간 성형 기술
김상우(S. W. Kim),엄성찬(S. C. Um),이영선(Y. S. Lee),원종보(J. B. Won),임권수(K. S. Lim) 한국소성가공학회 2013 한국소성가공학회 학술대회 논문집 Vol.2013 No.5
Recently, the application of magnesium alloy to automobile and electric parts have been increased because of its high specific strength, excellent machinability, high electrical and thermal conductivity. The efforts of automobile industry to reduce fuel consumption by using lightweight structural materials have accelerated the deep drawing technology of magnesium alloy sheet. In the present study, the basic study to fabricate an automotive compressor case have been carried out. Critical damage values for a ductile fracture criterion were determined from uniaxial tensile tests and FE simulations, and then they were expressed as the function of strain rate and temperature. The proposed methodology was applied to design the deep drawing process for fabrication of Mg alloy automotive compressor case without any defect. Based on the plastic deformation histories obtained from FE analysis of the non-isothermal deep drawing process and the critical damage value curves, the initiation time and location of fracture were predicted. The results were verified with experiments.