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RISS 인기검색어
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- 저자 : 최제세(Jese Choi) (검색결과 4 건)
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자동차 타이어 제작용 금형 주조재의 냉각특성에 관한 연구
최제세(Jese Choi),오율권(Yoolkwon Oh) 한국자동차공학회 2009 한국자동차공학회 부문종합 학술대회 Vol.2009 No.4
This study investigated on cooling characteristics of AC4C aluminum alloy casting material and AC7A aluminum alloy casting material using gravity casting method for manufacturing automobile tire mold by experiment. The temperature distribution and the cooling time of the AC4C casting material and the AC7A casting material were measured by experiment, and the results from the experiment were compared each other for the investigation of their characteristic. The cooling time of AC7A casting material was faster than cooling time of AC4C casting material about 20 minutes. Also, when casting was separated from permanent mold device, AC7A casting material was faster than AC4C casting material about 10 minutes by separating time. Therefore, when the separating time of casting materials were compared each other, the productivity is going to improve due to the decrease of producing time and increase of production.
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타이어 몰드 제작용 AC4C와 AC7A 주조재의 냉각특성 비교
최제세(Jese Choi),오율권(Yoolkwon Oh) 한국자동차공학회 2009 한국자동차공학회 지부 학술대회 논문집 Vol.2009 No.10
This study investigated on cooling characteristics of AC4C aluminum alloy casting material and AC7A aluminum alloy casting material using gravity casting method for manufacturing automobile tire mold by experiment and numerical analysis. The temperature distribution and the cooling time of the materials were measured by experiment, and the results from the experiment were compared each other for the investigation of their cooling characteristic. The displacement and the stress distribution of the materials were calculated by numerical analysis, and the results from the analysis were compared each other, and also the results of the experiment and the numerical analysis were compared each other. The experimental set up for measuring temperature and cooling time consisted of the casting, the metal mold device, data acquisition unit, nine K-type thermocouples and PC. For the numerical analysis, “COMSOL Multiphysics 3.3 Ver”, the commercial code based on the finite element method, was used for the prediction of displacement and stress distribution. As results of experiment, the cooling time of AC7A casting material was faster than cooling time of AC4C casting material about 20 minutes. Also, when casting was separated from permanent mold device, AC7A casting material was faster than AC4C casting material about 10 minutes by separating time. When the results from the numerical analysis were compared each other, the displacement of AC7A casting material was higher than the displacement of AC4C casting material about 1.7㎜, and the stress of AC7A casting material was higher than the stress of AC4C casting material about 0.1㎬.
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열전냉각시스템 냉각영역의 성능개선을 위한 압전구동기 적용에 관한 연구
윤희성(Heesung Yoon),최제세(Jese Choi),오율권(Yoolkwon Oh) 한국자동차공학회 2009 한국자동차공학회 학술대회 및 전시회 Vol.2009 No.11
This study investigated on performance improvement of cooling region in thermoelectric cooling system when piezoelectric actuator was applied. In this study, piezoelectric actuator was used for generating vibration in cooling region of thermoelectric cooling system. When vibration was generated by the piezoelectric actuator, temperature distribution was measured using thermocouples for investigating cooling characteristics in cooling region of thermoelectric cooling system. Also, He-Ne laser and CCD camera were used for flow visualization in cooling region. The experimental set-up for temperature measurement and the flow visualization in cooling region consisted of thermoelectric cooling system, piezoelectric actuator, thermocouples, data acquisition units, He-Ne laser, CCD camera, image grabber and PC. As a result, it was certified that vibration of piezoelectric actuator generated forced convection, and the cooling efficiency in the cooling region was improved when piezoelectric actuator was applied.
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압전 엑츄에이터를 이용한 열전냉각장치의 냉각효율에 관한 실험적 연구
오율권(Yoolkwon Oh),최제세(Jese Choi),윤희성(Heesung Yoon) 한국자동차공학회 2008 한국자동차공학회 지부 학술대회 논문집 Vol.2008 No.11
This study was experimentally investigated on cooling effect of cold region to thermoelectric cooling device using thermoelectric module when piezoelectric actuator was used. In this study, a prototype of a miniature thermoelectric cooling device using thermoelectric module and piezoelectric actuator were proposed and constructed. The temperature of cold region was measured to investigate cooling effect of cold region to thermoelectric cooling device when piezoelectric actuator wasn't operated and was operated. Also, the flow visualization of cold region using He-Ne laser and CCD camera was experimentally investigated. The experimental set-up for temperature measurement and the flow visualization consisted of thermoelectric cooling device using thermoelectric module, piezoelectric actuator, T-type thermocouple, data acquisition unit, He-Ne laser, CCD camera, image grabber and PC. When piezoelectric actuator was operated, acoustic streaming was occurred by vibration of piezoelectric actuator, and it was improved cooling effect.
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