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조립조건을 고려한 3세대 휠베어링 외륜 진원도 개선 연구
주진욱(Jinwook Joo),김학영(Hakyoung Kim),조호선(Hosun Cho),김주석(Joosuk Kim) 한국자동차공학회 2022 한국자동차공학회 부문종합 학술대회 Vol.2022 No.6
The wheel bearings support the weight of the vehicle and smooth the rotation of the wheel & tires. When the wheel bearing is assembled to the vehicle, the wheel bearing outer ring is deformed due to the fastening force, which adversely affects the life of the wheel bearing. In this study, to minimize the deformation of the wheel bearing outer ring under the assembling condition, we derived a model that minimizes the roundness deformation through analysis of the influence of the design factor of the wheel bearing outer ring on the roundness of the outer ring. And the improvement effect of the optimization model was verified through analysis and experiments.
윤활유 공급량에 따른 스퍼 기어의 피팅 수명에 관한 연구
주진욱(Jinwook Joo),문석만(Seokman Moon),김태완(Taewan Kim),조용주(Yongjoo Cho) 한국트라이볼로지학회 2011 한국트라이볼로지학회지 (Tribol. Lubr.) Vol.27 No.1
The object of this study is to investigate influences of supplied lubricant quantities on spur gear's pitting life. Pitting is a sort of contact fatigue failures and made by a repetitive load. Basically, pitting is difficult to predict its life by an analysis due to many factors to be considered about tribology problems. In this paper, pitting life was proved by experiment using two roller machine. For a contact fatigue test, operating circumstances should be considered. During the test, temperature and lubricant quantities are considered and to investigate an influence of lubricant quantities, a comparison between optimally enough and not enough lubricant quantity was implemented.
피팅 파손면적분석기법을 이용한 기어재의 피팅 수명 실험
주진욱(Jin Wook Joo),이병욱(Byung Wook Lee),문석만(Seok Man Moon),김태완(Tae Wan Kim),조용주(Yong Joo Cho) Korean Society for Precision Engineering 2010 한국정밀공학회지 Vol.27 No.11
The object of this study is to investigate the definite method for pitting damaged surfaces. Pitting is a sort of fatigue damages and it is made by a repetitive load. For a judgment between damages or not, sensing vibrations of test equipment is simple. However, it is not only difficult to observe a growth of pitting but also impossible to detect the juncture of initial pitting. Therefore, a method for the pitting damaged area measuring technique was effectively implemented by Two Roller Machine. The change of surface damaged area was measured by an optical microscope in regular time and calculated by the use of dark and bright ratio of test specimens' pictures taken by optical microscope. In conclusion, S - N Curves gained by Failure rate - Cycle graph was led and the curves are able to be chosen as occasion demands for a failure area percentage.