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배효준,이상재,서영백,박흥식,Bae, H.J.,Lee, S.J.,Seo, Y.B.,Park, H.S. 한국기계가공학회 2002 한국기계가공학회지 Vol.1 No.1
High speed machining system have been used in industrial because it is effective to a material manufacturing with various shape. Recently the end-milling processing is needed the high-precise technique with good surface roughness and rapid time in aircraft, automobile part and molding industry. Therefore this study proposed to decide best manufacturing cutting condition for surface roughness and rapid manufacturing tune by using computer Image processing system and 3D modelling. Until the 16,000 rpm, the surface roughness is decreased rapidly, but it is not over that. The 22,000 rpm is the spindle speed with the optimum surface in the high speed end-milling. In the case of the feed rate with 2,000 mm/mm and 8,000 mm/mm, the surface roughness is better than 4,000 mm/min and 6,000 mm/min. By using the 3D modelling, it is effectively represented shape characteristics of working surface m high speed end-milling.
배효준(H. J. Bae),조연상(Y. S. Cho),우규성(G. S. Woo),박흥식(H. S. Park) 한국트라이볼로지학회 2003 한국트라이볼로지학회 학술대회 Vol.37 No.-
The average frictional coefficient was used generally to analyze the moving state of lubricated machine. But It is difficult of getting the correct friction coefficient because the average frictional coefficient of it is progressed always unstably with a large amplitute on driving condition. If correct analysis of frictional coefficient on working condition for lubricated machine can be possible, it can be effect on diagnosis of lubricated machine. The purpose of' this study is carried out to get the working condition with a minimum frictional coefficient of transmission gear materials using statistical techniques.
배효준(H.J. Bae),조연상(Y.S. Cho),서영백(Y.B. Sea),박흥식(H.S. Park) 한국자동차공학회 2000 한국자동차공학회 지부 학술대회 논문집 Vol.- No.-
It is the effective method to diagnosis damage process of gear systems of automobile transmission to observe wear particle in gear oil. We tested with new transmission and took out gear oil according to drive distance, 4 shape parameters of wear particles in gear oil were calculated and wear volume were presumed with the image processing system. To be applied to damage diagnosis of gear system in transmission of automobile, We discuss number of wear particles, shape characteristics and total wear volume according to driving distance.
실험계획법에 의한 자동차 트랜스미션 기어 소재의 손상상태 예측
배효준(H. J. Bae),류을현(U. H. Ryu),전성재(S. J. Jun),박흥식(H. S. Park) 한국트라이볼로지학회 2004 한국트라이볼로지학회 학술대회 Vol.38 No.-
The average frictional coefficient was used generally to analyze the failure condition of lubricated machine. But It is difficult of getting the correct friction coefficient because the average frictional coefficient of it is progressed always unstably with a large amplitude on driving condition. If correct analysis of frictional coefficient on working condition for lubricated automobile transmission gear can be possible, it can be effect on diagnosis of failure condition. The purpose of this study is carried out to analyze friction factors affecting on friction coefficient of SCM420 and NT100 for prediction of failure condition of transmission gear materials by statistical techniques. The results show that the most important friction factors affecting on friction coefficient was applied load, next was sliding speed and materials.
다꾸지 기법에 의한 이륜자동차 브레이크 디스크의 마찰온도 및 마찰특성에 관한 연구
전환영(H. Y. Juen),배효준(H. J. Bae),이상재(S. J. Lee),박흥식(H. S. Park) 한국동력기계공학회 2005 한국동력기계공학회 학술대회 논문집 Vol.- No.-
The effect of manufacturing parameters on wear and improve cooling of motorcycle break system was studied using a disk-on-pad type friction tester. Such parameters conditions have an effect on the wear and improve cooling factor such as applied load, sliding speed, frictional time and number of ventilated disk hole. However, it is difficult to know the mutual relation of these factor. In this study, the wear and cooling characteristics using design of experiment containing 4 elements were investigated for an optimal condition for the best motorcycle disk break system employing Taguchi robust experimental design. From this study, the result was shown that vents have an effect on convection area improving more cooling ability and reduced wear of the disk.
CPX 및 Pass-by 계측을 이용한 단독 주행 차량의 음향파워 평가 방법에 관한 연구
최태묵(Choi, T.M.),문성호(Moon, S.H.),서영국(Seo, Y.G.),김진형(Kim, J.H.),김병희(Kim, B.H.),배효준(Bae, H.J.),지우진(Ji, W.J.),조대승(Cho, D.S.) 한국소음진동공학회 2006 한국소음진동공학회 논문집 Vol.16 No.11
This paper presents a novel method to determine sound power level(PWL) emitted by a travelling vehicle for road traffic noise simulation. The PWL is evaluated by the equivalent sound pressure level (SPL) measured by close proximity method and the sound power correction factor derived from the maximum SPL measured by pass-by method and the propagation attenuation of vehicle noise during the pass-by measurement. Using the method, we derive the empirical formula for PWL estimation in 1/1-octave and overall frequency bands for 8 vehicles (automobile, SUV, small truck, large bus, trailer, 3 dump trucks) tested at two road surfaces (dense graded asphalt, 30mm transverse tinning concrete) of Korean highway test road. The suggested approach, if securing sufficient data to represent the acoustic characteristics of all vehicle types, has il strong merit to be able to evaluate sound power levels for any combination of vehicle categories and traffic volumes.
류미라(M.R Ryu),배효준(H.J Bae),이상재(S.J Lee),박흥식(H.S Park),전태옥(T.O Jun) 한국트라이볼로지학회 2003 한국트라이볼로지학회 학술대회 Vol.36 No.-
We measure generally mean frictional coefficient in order to know the moving state of lubricated machine. If correct analysis of frictional coefficient on working condition for lubricated machine can be possible, it can be effect on diagnosis of lubricated machine. But mean frictional coefficient of it is progressed always unstably with a large amplitude. In this case, it is difficult of measuring the correct frictional coefficient. The purpose of this study is, carried out to get the working condition with a minimum frictional coefficient of hydraulic actuator materials using statistical techniques.