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최원식(W.S. Choi),이영선(Y.S. Lee),남중희(J.H. Nam),권주리(J.R. Kwon) 한국소성가공학회 2011 한국소성가공학회 학술대회 논문집 Vol.2011 No.5
The purpose of this study is to find of tribologic characteristics on the drag reduction in helical forging mold which is new development part in mobile auto-transmission. The test materials were SCr420H and SKD61. This study has used the pin-on-disk type of friction wear test system and has used the normal load in the range of 20-100N. It was operated at the speed range of 0.06-0.34m/s. The friction coefficient of helical gear and mold materials was a range of 0.02-0.12. When the velocity increases and the load decrease, the friction coefficient increased. On the other hand, the friction coefficient of dimple patterning materials was a range of 0.012-0.03. When the load increases, the friction coefficient decreased and the changes in velocity were not affected. The specimen of dimple processing was corresponding to 30% of the friction coefficient for not processing specimens. It is dimple effect.
주조용 White베어링메탈의 Bonding strength에 관한 연구
최원식(W.S.Choi),박대영(D.Y.Park),신미정(M.J Sin),최선미(S.M Choi),이창주(C.J Lee),김민규(M.K Kim) 한국산학기술학회 2014 한국산학기술학회 학술대회 Vol.- No.-
본 논문에서는 원심주조법을 사용하여 주조용 White metal의 Bonding strength에 관한 연구와 Ansys를 이용하여 주조시 최적의 주조 방법에 대해 연구하고자 한다.
최원식(Choi W. S),남중희(Nam J. H),손재환(Son J. H),이인(Lee Ihn),문희준(Mun H. J),권주리(Kwon J. R) 한국생산제조학회 2009 한국공작기계학회 추계학술대회논문집 Vol.2009 No.-
We have introduced the development for the manufacturing of the transmission helical gear in automobile in the future. The forging production of the helical gear for transmission was very useful to reduce the cost down and increase the life cycle than machining the gear as gear hobbing and turning. As result the simulation for the forging process by the computer, the temperature increase in lower pressure, the pressure lower in lower velocity in analysis the SCr420H steel. Also we had known as total reduction cost was up to 30% compare the machining the gear.