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김관회(K.H. Kim),이용성(Y.S. Lee),유승을(S.E. Yoo),최영민(Y.M. Choi),정광철(G.C. Jung) 한국자동차공학회 1996 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1996 No.11_1
To improve startability of engine at low temperature, two characteristics of glow plug are needed. The first is fast heat-up charateristic that decreases the waiting time to start and the second is duralibity that stands in combustion chamber that is under the condition of high temperature, high pressure and corrosion. Metal glow plug have been used has some limit to enhance heat-up speed and duralibity at the same time, so we developed ceramic glow plug. It takes for ceramic glow plug 3 seconds on average to 800℃ . This property of ceramic glow plug is 2 times as fast as that of metal. The result of duralibity test, 1 minute on-off test under 11 voltage, shows that no sign of shortage can be observed<br/>
김관회(K.H.Kim),이영웅(Y.W.Lee),길영배(Y.B.Kil),목홍균(H.K.Mok),김헌영(H.Y.Kim),조원석(W.S.Cho) 한국자동차공학회 1998 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1998 No.11_2
The front frame made by stamping the TB is developed. At the first, the requirement of the front frame is studied and the TB concept is designed and the computer simulation of stamping and crash is performed. After the above study, the first TB concept design is modified for the making mold and the forming. The stamped TB front frame was tested by compressing as the front frame only in the UTM. The collapse mode and load was checked with the deformation. In result, it is possible to raise up the crush performance of the front frame and at the same time to reduce the 20% weight reduction, and also the collapse mode of the front frame at the test can be changed from bending to axial collapse by the bead shape control.<br/>
박석완(S.W.Pak),권순용(S.Y.Kwon),김관회(K.H.Kim),조원석(W.S.Cho) 한국자동차공학회 1992 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Various joining methods were studied to choose a suitable<br/> method of joining aluminum alloy sheets for autobody, In this<br/> study, aluminum alloy sheets were joined by several methods such as resistance spot welding, laser welding mechanical<br/> clinching and ultrasonic welding. It was found that the shear<br/> tension force at the fracture was highest in the case of laser welded specimen. The mechnical clinching was found to be the<br/> most economic process and a powerful tool for joining different<br/> materials (for example, aluminum and steel) over other<br/> methods. Laser and resistance spot weldings were superior in the<br/> proditivity point of view. Therefore, the combined application of several joining methods seems to be a effective way of joining aluminum alloy body-parts than that of a single method.<br/>