Novel approach for weld depth determination using optical coherence tomography measurement in laser deep penetration welding of aluminum and steel

2019 ◽  
Vol 31 (2) ◽  
pp. 022007 ◽  
Author(s):  
Christoph Mittelstädt ◽  
Thorsten Mattulat ◽  
Thomas Seefeld ◽  
Markus Kogel-Hollacher
Keyword(s):  
Optical Coherence Tomography ◽  
Deep Penetration ◽  
Optical Coherence ◽  
Novel Approach ◽  
Laser Deep Penetration Welding ◽  
Depth Determination ◽  
Weld Depth ◽  
Optical Coherence Tomography Measurement ◽  
Deep Penetration Welding

Relation between Plasma Electrical Signal Oscillation and Weld Depth in Laser Deep Penetration Welding

2020 ◽  
Vol 47 (1) ◽  
pp. 0102006
Author(s):  
许赛 Xu Sai ◽  
杨立军 Yang Lijun ◽  
徐书峰 Xu Shufeng ◽  
黄一鸣 Huang Yiming ◽  
赵圣斌 Zhao Shengbin ◽  
...  
Keyword(s):  
Electrical Signal ◽  
Deep Penetration ◽  
Laser Deep Penetration Welding ◽  
Weld Depth ◽  
Deep Penetration Welding

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.

Simulation of Three-Dimensional Transient Behavior of Molten Pool in Laser Deep Penetration Welding

2016 ◽  
Vol 43 (11) ◽  
pp. 1102004
Author(s):  
夏胜全 Xia Shengquan ◽  
何建军 He Jianjun ◽  
王 巍 Wang Wei ◽  
吕学超 Lü Xuechao ◽  
张彤燕 Zhang Tongyan
Keyword(s):  
Molten Pool ◽  
Three Dimensional ◽  
Transient Behavior ◽  
Deep Penetration ◽  
Laser Deep Penetration Welding ◽  
Deep Penetration Welding
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