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Proceedings Paper

6-kW Nd:YAG laser system for welding applications
Author(s): Georg Bostanjoglo; Thomas Beck; Kurt Richter
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Paper Abstract

High average laser output power was realized by combining the beams of three Nd:YAG lasers of the 2 kW class, each being coupled into an individual 600 micrometers fiber. The end faces are imaged onto a 1 mm fiber, which then transmits 6 kW cw power to the processing station. With this laser system, butt and edge joints with up to 5 mm thick sheets of AlMgSil and AlMgMn4,5 were performed. Velocities of about 3 m/min in combination with filling wire and helium shielding gas yielded satisfying results. The sheets of 1.5 mm thickness were best welded with 8 m/min and a O 1 mm filler wire delivery speed of 5 - 7 m/min. One of the drawbacks of the system is the deterioration of beam quality due to the tilt angle between the incoming beams, so that a 1 mm fiber has to be used. With a modular oscillator-amplifier system with fiber link it should be possible to use fibers with smaller core diameter.

Paper Details

Date Published: 18 August 1997
PDF: 8 pages
Proc. SPIE 3097, Lasers in Material Processing, (18 August 1997); doi: 10.1117/12.281071
Show Author Affiliations
Georg Bostanjoglo, Laser- und Medizin-Technologie gGmbH (Germany)
Thomas Beck, Laser- und Medizin-Technologie gGmbH (Germany)
Kurt Richter, Laser- und Medizin-Technologie gGmbH (Germany)

Published in SPIE Proceedings Vol. 3097:
Lasers in Material Processing
Leo H. J. F. Beckmann, Editor(s)

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