http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
남중희(J. H. Nam),정성환(S. H. Jung),정택우(T. W. Jung),이영선(Y. S. Lee) 한국소성가공학회 2010 한국소성가공학회 학술대회 논문집 Vol.2010 No.5
Gear is used for various purpose and one component of a wide range machines, many researchers have been done to study manufacture method using cold forging technology(by Cold forging and Extrusion) due to high productivity and material utilization. But forging technology of helical gear is very difficult because of helix angle, tool life and deformation control of material. So this work was focused method to forge without rotation of die-set. Multi-stage forming process to produce helical gear was designed total 4 processes that 1-3 processes are hot forging and 4 process is cold forming process. Tooth shape forming process of helical gear investigated that forming method by bottom pressurization was optimum process in the results using finite element simulations. It was found that simulation results to predict forming load were slightly different from experiment results, but material flow and burr generation were in good agreement with experiment results.
이영선(Y. S. Lee),정택우(T. W. Jung),정성환(S.H.Jung),문영훈(Y.H.Moon) 한국소성가공학회 2010 한국소성가공학회 학술대회 논문집 Vol.2010 No.5
Precision forging of helical gear is very difficult because of helix angle. Dimensional tolerance of tooth profile should be from die through forged part into heat-treated part to get the required dimensional accuracy. Additionally, die machining also is very much difficult because helix angle is not accord with vertical axis. Therefore, a more precise study about dimensions is necessary to get the precise part, considering the dimensional changes from forging die to final part. In this paper, strategy investigating the dimensional changes of die and part are illustrated to investigate the effect of several features including die dimension at each forging step and heat-treatment on final part accuracy. The dimension of forged part is checked at each stage as machined die, cold forged, and post-heat-treatment steps.
김준형(J.H. Kim),윤영주(Y.J Yoon),이신주(S.J. Lee),정성환(S.H. Jung),이상옥(S.O. Lee),박점배(J.B. Park) 한국정보과학회 영남지부 2005 한국정보과학회 영남지부 학술발표논문집 Vol.13 No.1
본 연구는 실시간 영상 감지 시스템의 구현을 목표로 움직이는 물체의 광류를 찾고 해당 물체의 색상 정보를 이용하여 물체를 추적할 수 있는 영상 감시 시스템을 연구한 것이다. 움직인 물체의 색상정보와 CamShift 알고리즘을 이용하여 프로토타입을 구현한 결과, 정확한 물체 추적을 이용한 감시가 가능하였다.