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Production of Laser Welded Tube for Automobile Bumper Beam from 60kgf/$\textrm{mm}^2$Grade Steel Sheet  

Seo, Jung (한국기계연구원)
Lee, Je-Hoon (한국기계연구원)
Kim, Jong-Soo (한국기계연구원)
Kim, Jung-O (한국기계연구원)
Kang, Hee-Sin (한국기계연구원)
Lee, Moon-Yong ((주)성우하이텍 기술연구소)
Jung, Byung-Hoon ((주)성우하이텍 기술연구소)
Publication Information
Journal of the Korean Society for Precision Engineering / v.21, no.7, 2004 , pp. 136-144 More about this Journal
Abstract
Optimal process and system to produce the laser welded tube for one body formed bumper beam are studied. The calculated size of tube is a thickness of 1.4mm, diameter of 105.4mm and length of 2000mm. The tube is shaped from a cold rolled high strength steel sheet(tensile strength: 60kgf/$\textrm{mm}^2$ grade). Two roll bending method is the optimal tube shaping process compared to UO-bending, bending on press brake, multi-step continuous roll forming and 3 roll bending methods. Weld quality monitoring and seam tracking along the butt-joint lengthwise to the tube axis are also studied. The longitudinal butt-joint is welded by the $CO_2$ laser welding system equipped with a seam tracker and plasma sensor. The constructed $CO_2$laser tube welding system can be used for the precision seam tracking and the real-time monitoring of weld quality. Finally, the obtained laser welded tube can be used for one-body formed automobile bumper beam.
Keywords
Laser welded tube; Bumper beam; Seam tracking; Real-time quality monitoring;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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