Investigation of the Handheld Laser Welding Parameters

Nagy, Balázs Ákos and Kovács, Kíra and Kovács, Tünde Anna (2025) Investigation of the Handheld Laser Welding Parameters. ACTA MATERIALIA TRANSYLVANICA (EN), 8 (2). pp. 81-87. ISSN 2601-8799

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Abstract

High-performance handheld laser welding technologies have undergone significant advancements in recent years, particularly with the emergence of compact, cooled, and precise beam-shaping equipment. Handheld lasers (HL) possess all the advantages of their industrially applied, machine- or robotic-arm-guided coun terparts. The key distinction lies in numerical beam control, which, alongside the parameters critical for successful welding, receives particular attention. This was due to the material- and penetration-depth-depen dent program code table of the user-friendly Lightweld 1500 XT fiber laser welding equipment. During the experiments, S355 structural steel and DC01 cold-rolled steel sheets were welded in a T-joint configuration with varying sheet thicknesses, using identical material pairings. The used filler material was a Böhler EMK 8 Ø1 mm solid wire electrode, and the shielding gas was nitrogen with a 4.6. purity. We found that even with the settings recommended by the welding machine manufacturer, there were welding deviations, which suggests that the quality of manual welding also depends on the skill of the welder.

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