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탁성훈,황규석,손유선,배효제,류성기,Tak, Sung-Hoon,Hwang, Gue-Sec,Son, Yu-Sun,Bae, Hyo-Je,Lyu, Sung-Ki 한국트라이볼로지학회 2007 한국윤활학회지(윤활학회지) Vol.23 No.3
This study deals with the TE (Transmission Error) of gear tooth by modifying a profile and lead of a surface of tooth. First, we experimentally confirmed that the TE is a synthesis of the sliding velocity between both gears. Since various types of TE appear in the experiments, we introduced definition of transmission error and the optimism design by modifying a surface parameters. The test stand's performance is then evaluated through a series of multiple torque transmission error tests. Comparisons are made between data recorded before and after the test stand's redesign, and subsequently repeatability studies are performed to verify the veracity of the measured data. Finally, the experimental results are compared to the analytical predictions of two different gear analysis programs.
SCM415강에 증착된 코팅층의 마찰ㆍ마모특성에 관한 연구
탁성훈(SungHoon Tak),손유선(Yu Sun Son),배효제(Hyo Je Bae),김준성(Jun Seong Kim),최창(Chang Choi),류성기(Sung Ki Lyu) 한국트라이볼로지학회 2008 한국트라이볼로지학회 학술대회 Vol.2008 No.11
The purpose of this study is to show the friction and wear characteristics on the vapor deposited coating layers on the SCM4l5 steel. In this research, frictional wear characteristic of coating materials such as TiN, TiCN, TiAIN was investigated under room temperature, normal air pressure and nothing lubricating condition. Therefore this study carried out research on the friction coefficient, micro hardness(Hv), roughness, SEM on the vapor deposited coating layers on the SCM4l5 steel.
산불 발화에 따른 하층 대기 순환장 변화에 관한 수치 실험
이화운,탁성훈,이순환 한국환경과학회 2013 한국환경과학회지 Vol.22 No.2
In order to clarify the impact of wildfire and its thermal forcing on atmospheric wind and temperature patterns, several numerical experiments were carried out using three dimensional atmospheric dynamic model WRF with wildfire parametrization module SFIRE. Since wind can accelerate fire spread speed, the moving speed of fireline is faster than its initial values, and the fireline tends to move the northeast, because of the wind direction and absolute vorticity conservation law associated with driving force induced by terrain. In comparison with non-fire case, the hydraulic jump that often occurs over downwind side of mountain became weak due to huge heat flux originated by surface wildfire and wind pattern over downwind side of mountain tends to vary asymmetrically with time passing. Therefore temporal variation of wind pattern should be catched to prevent the risk of widfire.
TiN과 TiCN 코팅층의 마찰 마모 특성에 관한 연구
장정환(Jeong-Hwan Jang),탁성훈(Sung-Hoon Tag),장기(Qi Zhang),구재준(Jai-Jun Koo),류성기(SungKi Lyu) 한국기계가공학회 2009 한국기계가공학회 춘추계학술대회 논문집 Vol.2009 No.6
The purpose of this study is to show the friction and wear characteristics on the vapor deposited coation layers on the SCM415 steel. In this research, frictional wear characteristic of coating materials such as TiN, TiCN was investigated under room temperature, normal air pressure and nothing lubrication condition. Therefore this study carried out research on the friction coefficient, micro hardness(Hv), roughness, SEM on the vapor deposited coating layers on the SCM415 steel.
하휘파(HuiBo He),탁성훈(Sung Hoon Tak),배효제(Hyo Je Bae),장기(Qi Zhang),류성기(SungKi Lyu) 한국트라이볼로지학회 2008 한국트라이볼로지학회 학술대회 Vol.2008 No.11
본 연구에서 RFMP로 주입된 MoS₂/Ti 복합 코팅의 트라이볼로지 거동을 고찰하였다. 컴파운드 코팅은 MoS₂ 와 Ti의 크리스탈라이트로 이루어진 매우 조밀하고 미세한 구조를 형성하고 있다. 마모마찰시험은 볼온디스크 타입의 마모마찰 시험기를 사용하였으며, 진공상태와 일반 대기상태에서의 복합코팅의 마모마찰 특성을 고찰하였다. 코팅과 기질의 유착력을 검사하기 위하여 스크래치 테스트를 수행하였으며, 코팅의 구조는 광학현미경과 XRD, SEM 등 여러 검사법으로 고찰하였다. 그 결과는 복합코팅은 진공상태에서 저 하중으로 실험하였을 경우 극도로 낮은 마찰력이 발생하였지만 대기상태에서는 진공상태보다 약 9 배정도의 마찰력이 증가하였다. 복합코팅은 또한 매우 양호한 유착성을 보였다. 마모 흔적분석 결과 복합코팅막이 파괴되기 전까지 부드러우면서 안정적인 마모가 지배적으로 나타났다.
Ti-계 코팅이 SCM415강의 마찰ㆍ마모 특성에 미치는 영향
장정환(Jeong-Hwan Jang),탁성훈(Sunghoon Tak),장기(Qi Zhang),허철수(Zhezhu Xu),류성기(Sungki Lyu) 한국트라이볼로지학회 2010 한국윤활학회지(윤활학회지) Vol.26 No.3
The purpose of this study is to show the friction and wear characteristics on the vapor deposited Ti-series coating layers on the SCM415 steel. In this research, frictional wear characteristic of coating materials such as TiN, TiCN, TiAlN was investigated under room temperature, normal air pressure and dry lubricating condition. Therefore this study carried out research on the friction coefficient, micro hardness(Hv), roughness, SEM on the vapor deposited coating layers on the SCM415 steel.
TiN과 TiCN 코팅층의 마찰ㆍ마모 특성에 관한 연구
장정환(Jeong-Hwan Jang),탁성훈(Sung-Hoon Tag),장기(Qi Zhang),구재준(Jai-Jun Koo),류성기(SungKi Lyu) 한국기계가공학회 2009 한국기계가공학회 춘추계학술대회 논문집 Vol.2009 No.6월
The purpose of this study is to show the friction and wear characteristics on the vapor deposited coation layers on the SCM415 steel. In this research, frictional wear characteristic of coating materials such as TiN, TiCN was investigated under room temperature, normal air pressure and nothing lubrication condition. Therefore this study carried out research on the friction coefficient, micro hardness(Hv), roughness, SEM on the vapor deposited coating layers on the SCM415 steel.
배효제(Hyo-Je Bae),탁성훈(Sung-Hoon Tak),손유선(Yu-Sun Son),하휘파(Heibo He),류성기(Sung-Ki Lyu) 한국기계가공학회 2008 한국기계가공학회 춘추계학술대회 논문집 Vol.2008 No.-
This study deals with the effect of the honing in SCM420H helical gear. Typically, gear honing improves the tooth profile, lead and surface roughness. As a result, gear honing reduces vibration and noise, and will increase the life of gear. And gear honing also changes the surface of gear tooth in a short time and price, so it is a very important method in manufacturing industry. But nowadays, it is hard to find the detail information of gear honing. The test gear is a helical gear that is used in the automotive industry. It is manufactured by the order hobbing, shaving, carburizing and honing. This study investigates the effect of honing in surface shape of SCM420H helical gear, and including fatigue strength test and characteristics of honing of SCM420H helical gear.