Transactions of the Korean Society of Mechanical Engineers A (대한기계학회논문집A)

The Korean Society of Mechanical Engineers (대한기계학회)
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Hybrid Welding Process for Sheet Metal and Narrow Gap Fill Pass

하이브리드 용접방식을 이용한 박판 및 후판용접공정

  • 최해운 (계명대학교 기계자동차공학부) ;
  • 신현명 (계명대학교 기계자동차공학부) ;
  • 임문혁 (계명대학교 기계자동차공학부)
  • Published : 2008.11.01
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Abstract

An application of innovative laser+GMA hybrid welding process is presented for reducing bead humping defects in high speed welding and increasing side wall fusion in narrow groove welding without torch or wire oscillation. In this hybrid process, the laser heat input is applied adjacent to the weld pool at a relatively low power density to produce a wider, flatter weld bead. In bead on plate in sheet metal gauges, the hybrid process was able to produce hump-free welds from 70ipm (${\sim}1780mm/min$) to over 150ipm (${\sim}3810mm/min$) of the travel speed compared to the un-assisted GMAW process. A square-butt joint in 15mm A572 Gr50 steel welds was investigated. A square butt joint with a gap of 3.2mm was filled with 6 passes. Liquid Nitrogen calorimetry and innovative $CO_2$ laser reflective optics were also developed to demonstrate the concept of hybrid welding.

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References

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  2. Characteristics of GMAW Narrow Gap Welding on the Armor Steel of Combat Vehicles vol.7, pp.7, 2017, https://doi.org/10.3390/app7070658