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복합소재 사출인서트 알루미늄 바 카울크로스멤버 표면처리 특성에 따른 접합강도 분석 연구
손동일 ( Dong Il Son ),소상우 ( Sangwoo So ),황현태 ( Hyuntae Hwang ),최동혁 ( Dong Hyuk Choi ),최완규 ( Wan Gyu Choi ),김선경 ( Sun Kyung Kim ),김대일 ( Dae Il Kim ) 한국복합재료학회 2020 Composites research Vol.33 No.6
차량의 경량화를 위해 기존의 스틸로 제작된 카울크로스멤버를 마그네슘, 플라스틱으로 연구개발이 진행 되었으나, 차량 장착상태의 성능적인 문제로 적용이 어려운 실정이다. 최근 부품양산에 가장 적합한 경량화 부품으로 복합소재 인서트 사출 카울크로스멤버에 대한 연구를 진행하고 있다. 이는 알루미늄 바에 복합소재 브라켓 부품을 인서트 사출하는 제조 공정으로 차량의 장착 상태를 고려할 때, 두 부품의 체결상태가 중요한 요소 중에 하나이다. 본 연구에서는, PA6-GF60 복합소재에 알루미늄 바를 인서트 사출하기 위한 연구로 알루미늄 바의 접합강도가 중요한 요소 중에 하나이다. 이를 위한 연구방법으로 알루미늄 바에 접착제를 분사하는 방식과 널링처리를 한 경우에 대해, 카울크로스멤버의 알루미늄 바와 복합재료 사출부품 형상간의 부분 파트별로 횡방향과 회전방향에 대한 접합강도를 분석 연구하였다. Although research and development of existing steel-made Cowl Cross Member(CCM) was carried out with magnesium and plastic to make vehicles lighter, it is difficult to apply them to performance problems in the vehicle's mounting condition. Recently, the company is conducting research on the injection CCM of the composite insert as a lightweight component that is most suitable for mass-production of automotive parts. This is a manufacturing process that inserts composite injection bracket parts into aluminum bar, and the adhesion of the two parts is one of the important factors considering the vehicle's mounting conditions. In this study, the joint strength of Aluminum bar is one of the important factors as a study for the injection of aluminum bar into PA6-GF60 composite material. For the analysis of these research, the method of spraying adhesive to the aluminum bar and the case of knurling treatment have been analyzed and the bonding strength of the direction of rotation and lateral direction has been analyzed for each part between the aluminum bar of the cowl cross member and the shape of the injection component of composite materials.
손동일(Dong Il Son),최동혁(Dong Hyuk Choi),황현태(Hyun Tae Hwang),소상우(Sang Woo So),김선경(Sun Kyung Kim),정용하(Yong-Ha Jeong),김대일(Dae Il Kim) 한국생산제조학회 2020 한국생산제조학회지 Vol.29 No.5
In this study, a hybrid cowl cross member was produced using the extrusion method and through insert injection manufacturing. Adhesion tests were conducted on aluminum bars and composite materials to compare their performance with that of existing steel products. In addition, the deformation of the aluminum bar through injection pressure was analyzed during the injection molding of the insert. The hybrid cowl cross member was completed using the aluminum bar cross-section, considering the minimum range of adhesion and deformation of the aluminum bar. The durability of the developed product was assessed through vibration tests. Finally, the suitability of the developed product was assessed through sled tests after the vehicle was installed.
전류가열 사출금형에 의한 자동차 부품의 표면개선에 관한 연구
최동혁(Dong-Hyuk Choi),황현태(Hyun-Tae Hwang),손동일(Dong-Il Son),김대일(Daeil Kim) 한국표면공학회 2018 한국표면공학회지 Vol.51 No.1
The light-weight of the research and development materials is actively carried out by overseas automobile companies and technology development continues in Korea. For the sake of fuel efficiency, the development of lightweight technology by improving the manufacturing method has been very effective. Recently, to maximize the effects of light weight, automotive interior parts have been applied by the micro-cellular injection molding using supercritical fluids and we call the Mucell manufacturing. This technique causes a problem in the quality of the surface of the products, because the shooting cells are revealed as the surface layer of the products by forming micro cells at the center of the products during injection molding. To overcome these phenomenon, we increased the temperature of injection molding using joule heating until critical value. In this study, we have predicted the problem of Mucell injection molding through the finite element analysis as changed the temperature by joule heating. From the result of finite element analysis, we have determined the optimized process and made the injection mold included electric current heating system with Mucell manufacturing analyzed the surface characteristics of the injection product according to changing mold temperature.
사출법으로 제조된 자동차 내장부품의 표면특성 개선 연구
최동혁,황현태,손동일,김대일,Choi, Dong-Hyuk,Hwang, Hyun-Tae,Son, Dong-Il,Kim, Daeil 한국표면공학회 2019 한국표면공학회지 Vol.52 No.1
The environmental pollution which is global warming and abnormal climate is caused by increasing population and activated economics. To reduce environmental pollution, we have being efforts into reducing $CO_2$ emission and use of energy, resources. Especially, for the sake of light weight and fuel efficiency of automotive industry, many countries have defined the restrict environmental regulation which stipulate high magnitude of reducing $CO_2$ emission. In this study, we have predicted the problem of Mu-cell injection molding through the finite element analysis as a function of temperature controlled by Joule heating or in terms of mold temperature. From the result of finite element analysis, we have determined the optimized process and made the injection mold included electric current heating system with Mu-cell manufacturing. Lastly, we analyzed the surface characteristics of the injection products with mold temperature.
유도결합플라즈마 표면 처리 및 SnO<sub>2</sub> 증착에 따른 폴리카보네이트 특성 연구
엄태영,최동혁,손동일,엄태용,김대일,Eom, Tae-Young,Choi, Dong-Hyuk,Son, Dong-Il,Eom, Tae-Yong,Kim, Daeil 한국전기전자재료학회 2018 전기전자재료학회논문지 Vol.31 No.3
Inductively coupled plasma (ICP) treatment with argon and a mixture of argon and oxygen gases has been used to modify the surface of polycarbonate (PC) substrates. The results showed that the surface contact angle was inversely proportional to the plasma discharge power and that the mixed-gas plasma (gas flow 10:10 sccm, discharge power 60 W) decreased the surface contact angle as low as $18.3^{\circ}$, indicating a large increase in the surface hydrophilicity. In addition, $SnO_2$ thin films deposited on the PC substrate effectively enhanced the ICP plasma treatment, and could also enhance the usefulness of PC in the inner parts of automobiles.