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Thread Whirling Machine의 Worm Shaft 절삭공구의 마찰특성 및 수명예측에 관한 연구
손재환(J. H. Son),배대원(D. W. Bae),정상호(S. H. Jung),박건우(G. W. Park),이영문(Y. M. Lee) 한국생산제조학회 2007 한국공작기계학회 춘계학술대회논문집 Vol.2007 No.-
Recently, the application of the high-speed, precision part in automobile is increasing with the developments of design and manufacturing technologies of machining center and cutting tools. And worm shaft manufacturing changed from rolling process to whirling cutting process for high precision cutting. For analysis whirling cutting characteristics and tool life, geometrical definition is necessary. This paper developed a new formulas based on equivalent undeformed chip thickness, undeformed chip section area simulated with cutting condition.
본태성 진전 환자의 검지에서의 자세성 진전에 대한 감각자극 효과
이상기,김지원,권유리,이영재,이정환,엄광문,권도영,이찬녕,서유미,김미경,박건우,정호춘,Lee, S.K.,Kim, J.W.,Kwon, Y.R.,Lee, Y.J.,Lee, J.H.,Eom, G.M.,Kwon, D.Y.,Lee, C.N.,Seo, Y.M.,Kim, M.K.,Park, K.W.,Jeong, H.C.,Manto, M. 대한의용생체공학회 2013 의공학회지 Vol.34 No.3
The essential tremor is an involuntary oscillatory movement of body parts. Conventional treatments of essential tremor have little effects in some patients and also leads to significant side effects. Alternative to these treatments, sensory stimulation may have beneficial effects on the essential tremor. The purpose of this study was to analyze an effect of sensory stimulation on essential tremor. Ten patients with essential tremor ($67.4{\pm}8.82$ yrs, 5 men and 5 women) participated in this study. Three-axis gyro sensors were attached on index finger, hand and forearm of patients. Task of 'arms outstretched forward' was performed with and without sensory stimulation. Vectorsum of three dimensional angular velocities (pitch, roll, yaw) was calculated. Outcome measures included root-meansquare (RMS) mean of the vector-sum amplitude, total power, peak power and peak frequency. RMS amplitude, total power and peak power were reduced by sensory stimulation (p < 0.05). Peak frequency was not affected by sensory stimulation. The results indicate that the sensory stimulation is useful to suppress the essential tremor.
Thread Whirling Machine의 Worm Shaft 절삭공구의 마찰특성 및 수명예측에 관한 연구
손재환(J. H. Son),배대원(D. W. Bae),정상호(S. H. Jung),박건우(G. W. Park),이영문(Y. M. Lee) 한국생산제조학회 2007 한국생산제조시스템학회 학술발표대회 논문집 Vol.2007 No.5
Recently, the application of the high-speed, precision part in automobile is increasing with the developments of design and manufacturing technologies of machining center and cutting tools. And worm shaft manufacturing changed from rolling process to whirling cutting process for high precision cutting. For analysis whirling cutting characteristics and tool life, geometrical definition is necessary. This paper developed a new formulas based on equivalent undeformed chip thickness, undeformed chip section area simulated with cutting condition.