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인써트몰딩을 이용한 조향용 Worm Gear 성형에 관한 연구
노상호(SangHo Noh),한범석(BeomSuck Han),한창수(ChangSu Hahn),남종승(JongSeung Nam),송강석(KangSeok Song) 한국자동차공학회 2005 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2005 No.11_3
Plastic Worm Gears are used in a. number of industrial application in the automotive industry. This study deeds with plastic(Nylon, PPA) worm gear for assurance of durability and reduce noise and weight reduction. The Simulation of computer is introduced and studied to insert molding on plastic worm gear. Flow Analysis Simulation can save time and error for injection process. We examined the property of plastic gear as abrasion, strengthen, inner void. As a result of this Insert Molding Process, We have enough plastic worm gear to use Automotive Steering Column System.
윤형준(Hyungjoon Yoon),윤영식(Youngsik Yoon),한범석(Beomsuck Han),류용문(Yongmun Ryu) 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Recently the automotive industry faces many competitive challenges including weight and cost reduction to meet needs for higher fuel economy. The roller hemming technology has been recognized as a new production technique, which contributes to a light-weight car. Hemming is the last forming process in stamping and determines external quality of automotive outer panels such as doors, hood and trunk lid. In this study, implicit finite element analysis of the flat surface-straight edge roller hemming process is performed by using the commercial code ANSYS. This study shows the process of roller hemming simulation.
최재영(Jaeyoung Choi),성시영(Siyoung Sung),한범석(Beomsuck Han),한창수(Changsu Hahn) 한국자동차공학회 2011 한국자동차공학회 학술대회 및 전시회 Vol.2011 No.11
Supply of green car is increasing all over the world from oil-shock and environmental regulation implementation. So, customers are more interested in it. However they are easily overlooked feature of Green car that is different from internal combustion engine. Especially, Green car is using motor to generator when slowing down the car. At this time, there is occurring electric energy. It is charged to battery we call it regenerative braking. But it is difficult for people understanding the regenerative braking"s principle. Regenerative braking simulator can be using to people knowing the regenerative braking functions. After spinning the inertia mass which is using by in-wheel motor, it can be operating four types of automatic and passivity mode. It is developed to easily understand by people the braking time and correlation of regenerative braking.
알루미늄 판재 적용 십자형 액압성형 공정의 해석 및 실험적 고찰
신동우(Dongwoo Shin),윤영식(Youngsik Yoon),김동옥(Dongok Kim),유용문(Yongmun Ryu),한범석(Beomsuck Han),강대건 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.11
Hydro-mechanical forming process has numerous advantages compared to those of a conventional deep drawing process such as an excellent surface quality and low costs of dies. In fact, Hydro-mechanical forming is a desirable forming process for producing complex parts in automotive body components, and it is an excellent candidate for the forming process of aluminum panels. In this research, Hydro-mechanical forming process with a cross shape punch has been studied for Al-Si-Mg alloy sheets. Finite element analysis by LS-Dyna has predicted the deep drawing depth of the aluminum sheets, and the experiment has confirmed that result. Put Abstract text here.
김진평(Jinpyeong Kim),김동옥(Dongok Kim),한창수(Changsoo Hahn),유용문(Yongmun Ryu),한범석(Beomsuck Han) 한국자동차공학회 2009 한국자동차공학회 부문종합 학술대회 Vol.2009 No.4
Tube Hydroforming has several advantages compared to the conventional press forming process. It can reduce the manufacturing costs and produce complicated shape without welding process with superior surface quality. Since aluminum alloy which is an excellent candidate for the light automotive application is difficult to be formed, tube hydroforming process can be applied to achieve desirable shape of parts. However, the tube forming process can leave residual stresses on the part, it is important to characterize the stresses in terms of their reliability and dimensional precision. Therefore, in this study, residual stresses of tube hydroformed aluminum alloy has been measured by X-ray diffraction system and the results will be compared to those of theoretical analysis.
신동우(Dongwoo Shin),윤영식(Youngsic Yoon),김동옥(Dongok Kim),한범석(Beomsuck Han),류용문(Yongmun Ryu),박준영(Junyoung Park) 한국자동차공학회 2009 한국자동차공학회 부문종합 학술대회 Vol.2009 No.4
Recently, the automotive industry faces strict environmental regulations, and takes an effort to reduce the weight of vehicles to meet the needs for high fuel economy. Therefore, the use of light metals such as aluminum alloys has been increased for the production of light vehicles. However, since the formability of aluminum alloys is not as good as that of steel, special attention is needed during the forming processes. Hot Blow Forming have been introduced as fairly new processes for the forming process of light metals. All processes can give better forming capability with high drawing ratio, and they also can reduce the residual stresses on the parts by giving more uniform pressure. In this paper, numerical studies with experiments for all four forming processes have been carried out by using implicit and explicit hybrid code ANSYS LS-DYNA.