Numerical simulation of formation process of keyhole-induced pore for laser deep penetration welding

Simulation Results ◽

In order to simulate accurately the formation process of the keyhole in laser deep penetration welding. Multiple reflection and Fresnel absorption are implemented simultaneously with the ray tracing technique in the keyhole. With all the governing equations including continuity, momentum and energy equation, the VOF method is adopted to trace the free surface of the molten pool. Simulation results are compared with the experimental ones to verify its validity.

Numerical Simulation of Temperature Field during Laser Deep Penetration Welding

Materials Science Forum ◽

10.4028/www.scientific.net/msf.675-677.865 ◽

2011 ◽

Vol 675-677 ◽

pp. 865-867

Author(s):

Ren Ping Wang ◽

Y.P. Lei

Keyword(s):

Numerical Simulation ◽

Temperature Field ◽

Computational Analysis ◽

Energy Equation ◽

304 Stainless Steel ◽

Deep Penetration ◽

Governing Equations ◽

Deep Penetration Welding ◽

Laser Keyhole Welding

A computational analysis is achieved during laser deep penetration welding. Multiple reflection and absorption are implemented simultaneously with the ray tracing technique in the keyhole. With all the governing equations including continuity, momentum and energy equation, the VOF method is adopted to trace the free surface of the molten pool. Temperature field is achieved by numerical simulation. The laser keyhole welding experiments on 304 stainless steel sheet showed that the computational results agree well with experimental results.

Research on Formation Process of Keyhole During Fiber Laser Deep Penetration Welding

Laser & Optoelectronics Progress ◽

10.3788/lop57.071402 ◽

2020 ◽

Vol 57 (7) ◽

pp. 071402

Author(s):

赵乐 Zhao Le ◽

韩雪 Han Xue ◽

邹江林 Zou Jianglin ◽

郑凯 Zheng Kai ◽

肖荣诗 Xiao Rongshi ◽

...

Keyword(s):

Fiber Laser ◽

Formation Process ◽

Deep Penetration ◽

Numerical Simulation of the Thermal Efficiency During Laser Deep Penetration Welding

Physics Procedia ◽

10.1016/j.phpro.2016.08.144 ◽

2016 ◽

Vol 83 ◽

pp. 1377-1386 ◽

Cited By ~ 2

Author(s):

A. Ganser ◽

J. Pieper ◽

S. Liebl ◽

M.F. Zaeh

Keyword(s):

Numerical Simulation ◽

Thermal Efficiency ◽

Deep Penetration ◽

Melt flow regularity and hump formation process during laser deep penetration welding

Optics & Laser Technology ◽

10.1016/j.optlastec.2021.106950 ◽

2021 ◽

Vol 139 ◽

pp. 106950

Author(s):

Baoqi Zhu ◽

Gaolei Zhang ◽

Jianglin Zou ◽

Na Ha ◽

Qiang Wu ◽

...

Keyword(s):

Formation Process ◽

Deep Penetration ◽

Melt Flow ◽

Impacts on keyhole oscillations and process pores during laser deep penetration welding

International Congress on Applications of Lasers & Electro-Optics ◽

10.2351/1.5063184 ◽

2015 ◽

Author(s):

Jörg Volpp ◽

Peer Woizeschke ◽

Frank Vollertsen

Keyword(s):

Deep Penetration ◽

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

wt Werkstattstechnik online ◽

10.37544/1436-4980-2021-11-12-93 ◽

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 ◽

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.