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알루미늄 고진공 다이캐스팅 공법을 적용한 전륜 서브프레임 개발
윤석진(Sukjin Yoon),김성구(Seonggoo Kim),김규록(Gyurok Kim),정의근(Euikeun Jeong),이용욱(Yonguk Lee),조영건(Younggun Cho) 한국자동차공학회 2020 한국자동차공학회 학술대회 및 전시회 Vol.2020 No.11
In the automobile industry, many parts are manufactured by applying aluminum materials to improve fuel efficiency and reduce vehicle weight. In particular, in order to design and manufacture future electric vehicles, the weight reduction of vehicles is receiving more and more challenges. In the case of a suspension part, since it is located in the lower part of the vehicle, it has a great advantage of improving fuel economy due to weight reduction. This paper describes the development stage of a front wheel subframe with a welded structure of aluminum high vacuum die casting method and extrusion method. The result of the aluminum subframe study showed that the weight was reduced by 5.6㎏ and natural frequency was improved by 16㎐ compared with the steel subframe.
후륜 서브프레임 용접 설계 변수에 따른 용접민감도 분석
윤석진(Sukjin Yoon),이계호(Kyeho Lee),김요셉(Yoseb Kim),김태진(Taejin Kim) 한국자동차공학회 2022 한국자동차공학회 학술대회 및 전시회 Vol.2022 No.11
Each Part of the rear subframe for an automotive is joined by a welding. The quality of welded joint may be dispersion depending on various conditions such as operator proficiency, work environment, etc., and this effect may cause differences in the design life of the initially predicted product. In this study, fatigue analysis of the rear subframe welded joint part was performed using FEMFAT which a commercial fatigue analysis program. In addition, the weld sensitivity analysis considering weld quality according to the shape variable of the welded joint part was performed, and fatigue life changes at positions of the major vulnerable parts were studied.
알루미늄 저압중공주조 공법을 이용한 후륜 크로스멤버 개발
윤석진(Sukjin Yoon),손준형(Junhyung Sohn),장우정(Woojung Jang),윤주영(Juyoung Yoon),이용욱(Yonguk Lee),조영건(Younggun Cho) 한국자동차공학회 2020 한국자동차공학회 학술대회 및 전시회 Vol.2020 No.11
In the case of a suspension part, since it is located in the lower part of the vehicle, it has a great advantage of improving fuel economy due to weight reduction. In order to reduce the weight of vehicles, there are increasing cases of applying aluminum to suspension parts. This paper describes the stages of development of a rear cross member with a welded aluminum low pressure hollow casting method and extrusion method. The result of the aluminum cross member study showed that the weight was reduced by 6.3㎏ and natural frequency was improved by 46.7㎐ compared with the steel cross member.
핫 스탬핑 공정을 이용한 자동차용 프론트 크로스 멤버 개발
윤석진(Sukjin Yoon),박종규(Jongkyu Park),김양수(Yangsu Kim),정재규(Jaegyu Jung),전진화(Jinhwa Jeon) 한국자동차공학회 2010 한국자동차공학회 학술대회 및 전시회 Vol.2010 No.11
In the automotive industry, the high strength steel offers the possibility to obtain significant reduction of weight without affecting the structural performances of final products. The hot stamping represents an innovative manufacturing process for forming of high strength steels, implying a sheet at austenite temperature being rapidly cooled down and formed into a die at the same time(quenching). This forming process is used for the manufacturing of automobile structural components with a strength of up to 1,500㎫, thus enabling extensive cost saving and good crash performance. In this study thermal-mechanical coupled simulation with PAM-STAMP™ was carried out for forming and cooling of a hot stamped part. Moreover, mechanical properties of front cross member with hot stamping.
윤석진(Sukjin Yoon),이계호(Kyeho Lee),김성구(Seonggoo Kim),정현진(Hyunjin Jung),김정(Jung Kim),이지현(Jihyun Lee) 한국자동차공학회 2016 한국자동차공학회 부문종합 학술대회 Vol.2016 No.5
An Automotive front cross member supports many crucial components and systems, such as an engine, transmission, and suspension. Important performance measures for the design of a front cross member include durability, stiffness, and NVH, while minimizing weight of primary concern. This paper presents an effective and efficient methodology for front cross member design from conceptual design to detailed design using design optimization.