http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
알루미늄 압출재의 접합부 강도에 영향을 미치는 마찰교반 점용접 툴 형상에 관한 연구
천창근(Chang-Keun Chun),박인규(In-Gyu Park),엄경수(Kyung-Su Umm),장웅성(Woong-Seong Chang) 한국철도학회 2009 한국철도학회 세미나자료 Vol.2009 No.5
Aluminum extrude is increasing to vehicle body manufacture of a recent railroad vehicle. Conventional welding of this aluminum extrude has been used MIG welding or resistance spot welding mainly. But the advanced manufactures like Japan's tried to apply the friction stir welding and friction spot joining at railroad vehicle body manufacture process. Therefore in this paper we tried to study to apply friction stir welding to AL 6005-T6 extrude which has been manufactured the railroad vehicle mainly. In this study we investigated first the mechanisms to affect the welding strength in friction stir welding. After we made the 3 tools of different shape, we observed how the welding strength changed while changing the welding time and the rotation speed, the plunging depth.
마찰교반용접에서 툴의 형상이 접합부 강도에 미치는 영향에 관한 연구
천창근(Chang-Keun Chun),김흥주(Hyeng-Ju Kim),박인규(In-Gyu Park),전시현,장웅성(Woong-Seong Chang),Kyung-Su Umm 한국철도학회 2009 한국철도학회 학술발표대회논문집 Vol.2009 No.5월
As demand regarding a recent energy-saving rises, the using ratio of the aluminum plate in manufacturing of a railroad vehicle has been increasing. The aluminum structure to be applied to a railroad vehicle is divided to single skin and double skin, and the main aluminum product is mainly Al 6005 extrude and Al 5083 rolled in domestic market. The Al 6005 alloy is applied heat treatment in order to improve the strength of material. Therefore there is the disadvantage that the strength of welding zone decreases compare with base material's if you apply to fusion welding like MIG(metal inert gas) welding. In this paper we tried to apply friction stir welding to solve these problems. In this study we investigated how tensile strength and fatigue strength were changed in case of changing the shoulder diameter of thread tool.
천창근,장웅성,노중석,정태휘,조중선,Chun, Chang-Keun,Chang, Woong-Seong,Noh, Joong-Suk,Joung, Tae-Whee,Joh, Joong-Seon 대한용접접합학회 2006 대한용접·접합학회지 Vol.24 No.1
This paper describes the friction surface modification which has been successfully developed with the friction stir welding recently There are several problems including just position control and backlash in conventional friction surface modification system. Therefore it has been developed the friction surface modification system which has been controlled precisely both position and force by driving hydraulic cylinder in this paper. The mechtrode rotation speed(N) and feeding speed(Vz), travel speed(Vx,y) are of critical importance for the width and thickness of the coating in friction surfacing process. But there is no theoretical method of determining interrelations between process parameters affect the coating width and thickness. As a result of DOE(design of experiment) with developed system, the coating thickness and width seemed to decrease according to increase the mechtrode rotation speed(N) and traveling speed(Vx,y), to decrease feeding speed(Vz) apparently. However as the result of regression analysis the main effect was only the mechtrode rotation speed in the coating thickness.