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강희신(H. S. Kang),서정(J. Suh),박경택(K. T. Park),김정오(J. O. Kim),이제훈(J. H. Lee),유상현(S. H. You) 대한기계학회 2006 대한기계학회 춘추학술대회 Vol.2006 No.6
This paper describes the evaluation methods of welding qualities in manufacturing the laser welding parts for automobile body. After and during laser welding the qualities of welding parts is studied to estimate the defects of welding parts. The welding qualities are evaluated from the intensities of plasma generated during welding. The plasma detector is consisted of UV and IR sensor. The first research is carried out in case of the CO₂ laser welding. With this results the research about Nd:YAG laser welding is done and continuously been doing in case of Nd: YAG laser welding with high power. The used Nd:Y AG laser system is 250W of Lumonics and the used CO₂ laser welding system is 4㎾ of Rofin-Sinar This research and the developed plasma sensor will be applied the evaluation of laser welding quality.
송준혁(S.J. Song),김하수(H.S. Kim),강희용(H.Y. Kang),양성모(S.M. Yang),홍동표(D.P. Hong),정태진(T.L. Chung),최병기(B.K. Choi) 한국자동차공학회 1996 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1996 No.6_1
This study has two main pants, comqaring the characteristics between the conventional clutch system and DMF system, and the DMF system in vehicle and computer simulation of DMF. The characteristics of torsional vibrations between a conventiona1 clutch system after optimal clutch system tunning and DMF system at engine phase of stat up, idle, creeping drive and coast. To develope a new optimum system, a dynamic model of powertrain at idle phase is developed compared with actual vehicle at start up ant idle phase of engine. This model is well suited for actual system. First of all, a DMF system is superior to a conventional clutch system.