Self-defocusing of a laser beam in the process of deep-penetration welding

2001 ◽  
Author(s):  
Nikolay E. Galich ◽  
Valery A. Petrushchenkov
Keyword(s):  
Laser Beam ◽  
Deep Penetration ◽  
Deep Penetration Welding

Advantages of laser beam oscillation for remote welding of aluminum closely above the deep-penetration welding threshold

2017 ◽  
Vol 29 (1) ◽  
pp. 012001 ◽  
Author(s):  
Martin Sommer ◽  
Jan-Philipp Weberpals ◽  
Steffen Müller ◽  
Peter Berger ◽  
Thomas Graf
Keyword(s):  
Laser Beam ◽  
Deep Penetration ◽  
Deep Penetration Welding ◽  
Remote Welding ◽  
Beam Oscillation

Development of ultra deep penetration welding with 10 kW fiber laser

2008 ◽  
Author(s):  
Xudong Zhang ◽  
Eiji Ashida ◽  
Seiji Katayama ◽  
Masami Mizutani
Keyword(s):  
Fiber Laser ◽  
Deep Penetration ◽  
Deep Penetration Welding

Self-focusing and waveguide propagation of radiation in the case of deep penetration of a metal by a laser beam

1985 ◽  
Vol 15 (11) ◽  
pp. 1515-1523 ◽  
Author(s):  
A G Borkin ◽  
S V Drobyazko ◽  
E B Levchenko ◽  
Yu M Senatorov ◽  
V V Turygin
Keyword(s):  
Laser Beam ◽  
Deep Penetration ◽  
Self Focusing ◽  
Waveguide Propagation

OCT-Einschweißtiefenüberwachung bei Unterdruck/OCT-based weld penetration monitoring at reduced ambient pressure – Influence of reduced ambient pressure on the OCT signal quality in laser deep penetration welding

2021 ◽  
Vol 111 (11-12) ◽  
pp. 863-868
Author(s):  
Thorsten Mattulat ◽  
Ronald Pordzik ◽  
Peer Woizeschke
Keyword(s):  
Penetration Depth ◽  
Ambient Pressure ◽  
Laser Beam Welding ◽  
In Situ Monitoring ◽  
Deep Penetration ◽  
Weld Penetration ◽  
Laser Deep Penetration Welding ◽  
Deep Penetration Welding ◽  
Non Destructive

Die optische Kohärenztomographie (OCT) erlaubt die zerstörungsfreie In-situ-Überwachung der Einschweißtiefe beim Laserstrahlschweißen. Für dieses Verfahren wird hier der Einfluss von verringerten Umgebungsdrücken auf die Messqualität untersucht. Es wird gezeigt, dass sich bei niedrigerem Umgebungsdruck deutlich größere Signalanteile aus dem Bereich des Bodens der Dampfkapillare zurückerhalten lassen. Auf diese Weise steigen die effektive Messfrequenz und die Erkennbarkeit von Änderungen der Einschweißtiefe.   Optical coherence tomography (OCT) enables non-destructive in-situ monitoring of the weld penetration depth during laser beam welding. For this technology, the influence of reduced ambient pressures on the measurement quality is investigated. It is shown that significantly larger signal components are obtained from the bottom of the vapor capillary at lower ambient pressure increasing the applicable measurement frequency and the detectability of changes in the weld penetration depth.

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