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강관의 하이드로포밍시 성형구간과 공정인자에 대한 실험적 연구
안익태(I. T. An),현도익(D. I. Hyun),김봉준(B. J. Kim),문영훈(Y. H. Moon) 대한기계학회 2002 대한기계학회 춘추학술대회 Vol.2002 No.4
Tube hydroforming has attracted increased attention in the automative industry recently. It can produce wide range of products such as subfrarnes, engine cradles, and exhaust manifolds with cheaper production cost by reducing overall number of processes. The purpose of this study is to trace cause of these forming failure and to make optimal process condition. Expermental studies have been performed to investigate the effects of each parameters such as internal pressure, axial feeding and holding time. Tubes used in the experiment are SPS290 and SAPH38P. In case of the T-fitting bulge height at initial process, middle process and last process are investigated and then compared. In the cylindrical hvdroforming the effect of holding time has been observed.