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Beam shaping BrightLine Weld: latest application results
Author(s): Stefanie Feuchtenbeiner; Wilrid Dubitzky; Tim Hesse; Nicolai Speker; Patrick Haug; Johannes Seebach; Jan-Patrick Hermani; David Havrilla
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Paper Abstract

Recently, a new laser welding technology called BrightLine Weld has been introduced by TRUMPF. It is based on applying a TruDisk thin-disk solid-state laser with a so called two-in-one fiber delivery optical cable. In combination with a novel system of variable laser power coupling into the inner as well as the outer fiber core, an application-tailored laser power distribution is created. This enables a new degree of freedom through beam shaping for laser keyhole welding. The process benefits are significantly higher achievable feed rates during welding, minimal spatter formation and highest weld seam qualities. This paper presents latest results on welding of steel, aluminum and highly reflective materials such as copper using BrightLine Weld. The welding of gear parts has been performed exploiting the full feed rate performance with highly alloyed steels. Endurance strength tests show that the weld seam characteristics of these novel high-speed welds fulfill state-of-the-art requirements. We also report on results in weld penetration depth monitoring, applying optical coherence topography (OCT) to copper welding samples. Due to the keyhole stabilization in a wide range of feed rates and their respective penetration depths, the keyhole depth monitoring becomes widely applicable and supports the process especially in terms of reliability. Furthermore, an outlook on full penetration welding of tubes and profiles will be given. We will show first application results demonstrating the impact of BrightLine Weld on spatter prevention both on the top and on the bottom side of the weld seam.

Paper Details

Date Published: 27 February 2019
PDF: 8 pages
Proc. SPIE 10911, High-Power Laser Materials Processing: Applications, Diagnostics, and Systems VIII, 109110X (27 February 2019); doi: 10.1117/12.2509560
Show Author Affiliations
Stefanie Feuchtenbeiner, TRUMPF Laser- und Systemtechnik GmbH (Germany)
Wilrid Dubitzky, TRUMPF Laser- und Systemtechnik GmbH (Germany)
Tim Hesse, TRUMPF Laser- und Systemtechnik GmbH (Germany)
Nicolai Speker, TRUMPF Laser- und Systemtechnik GmbH (Germany)
Patrick Haug, TRUMPF Laser- und Systemtechnik GmbH (Germany)
Johannes Seebach, TRUMPF Laser- und Systemtechnik GmbH (Germany)
Jan-Patrick Hermani, TRUMPF Laser GmbH (Germany)
David Havrilla, TRUMPF Inc. (United States)

Published in SPIE Proceedings Vol. 10911:
High-Power Laser Materials Processing: Applications, Diagnostics, and Systems VIII
Stefan Kaierle; Stefan W. Heinemann, Editor(s)

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