Product Code: ICA12_605

Comprehensive Monitoring and Control of Laser Hybrid Arc Welding in Industrial Production
Authors:
Jan Karlsson, Department of Engineering Sciences and Mathematics, Luleå University of Technology; Luleå USA
Alexander F. H. Kaplan, Department of Engineering Sciences and Mathematics, Luleå University of Technology; Luleå Sweden
Presented at ICALEO 2012

Welding requires acceptable quality along the entire weld. In particular, the weld surface geometry has a vital role in ensuring an adequate fatigue life. This paper describes the results of a case study of laser hybrid arc welding of a structural vehicle component of complex geometry. By isolating the various weld geometries, along with systematic experimental studies using a scanner and high speed imaging, the whole chain of the welding process can be analyzed and controlled. The component is made of two types of 7mm and 20mm thick high strength steel, requiring butt joints and T-joints, with 7mm penetration. Cold Metal Transfer is compared to the more common spray mode of the arc, as it offers reduced spatter, undercuts and distortion. The study demonstrates the suitability of this new systematic procedure for controlling the whole welding process under industrial production conditions.

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