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Crucial role of beam spot position in laser assisted plasma arc welding

: Mahrle, Achim; Rose, Sascha; Beyer, Eckhard; Füssel, Uwe


Science and technology of welding and joining 19 (2014), No.2, pp.119-124
ISSN: 1362-1718
Journal Article
Fraunhofer IWS ()
fibre laser; hybrid welding; laser arc distance; laser arc order; laser assisted arc welding; plasma arc

Recently, laser assisted plasma arc welding applying a coaxial arrangement of both heat sources has been developed. This process is now utilised to investigate the impact of beam spot positioning in relation to the arc axis. Arc shapes, arc voltage signals and weld seam geometries for arrangements with a leading and trailing laser beam are compared. The analysis clearly demonstrates the crucial role of small variations in beam spot positioning on the characteristics and the performance of laser assisted plasma arc welding. The results provide new insights into the most efficient driving mechanisms for synergistic effects in laser arc processing.