Study of the influence of focal position on back-reflected radiation during deep penetration laser welding and its simulation

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081731%3A_____%2F19%3A00522282" target="_blank" >RIV/68081731:_____/19:00522282 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.spiedigitallibrary.org/conference-proceedings-of-spie/11385.toc#FrontMatterVolume11385" target="_blank" >https://www.spiedigitallibrary.org/conference-proceedings-of-spie/11385.toc#FrontMatterVolume11385</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1117/12.2542806" target="_blank" >10.1117/12.2542806</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Study of the influence of focal position on back-reflected radiation during deep penetration laser welding and its simulation

Popis výsledku v původním jazyce

penetration laser welding mode characterized by formation of keyhole is often used. A small portion of the laser beam is reflected back from the keyhole and returned to the laser through the optical system of the welding head and optical fiber. The reflected radiation is monitored in the laser for the safety of the optical resonator and its signal can be read and used for process monitoring. The experiment was conducted to relate the intensity of the back-reflected radiation with depth and width of the weld for the variable focal position. The experiments were performed for two variants of the optical focusing system and materials with different thermo-physical properties - carbon steel and stainless steel. Furthermore, a mathematical model for back-reflected radiation was created using ray tracing. The shape of the keyhole was approximated as an inclined conical cavity. The results of the simulation were compared with experimentally measured data and it was found that the proposed model is most suitable for the description of stainless steel.

Název v anglickém jazyce

Study of the influence of focal position on back-reflected radiation during deep penetration laser welding and its simulation

Popis výsledku anglicky

penetration laser welding mode characterized by formation of keyhole is often used. A small portion of the laser beam is reflected back from the keyhole and returned to the laser through the optical system of the welding head and optical fiber. The reflected radiation is monitored in the laser for the safety of the optical resonator and its signal can be read and used for process monitoring. The experiment was conducted to relate the intensity of the back-reflected radiation with depth and width of the weld for the variable focal position. The experiments were performed for two variants of the optical focusing system and materials with different thermo-physical properties - carbon steel and stainless steel. Furthermore, a mathematical model for back-reflected radiation was created using ray tracing. The shape of the keyhole was approximated as an inclined conical cavity. The results of the simulation were compared with experimentally measured data and it was found that the proposed model is most suitable for the description of stainless steel.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

10306 - Optics (including laser optics and quantum optics)

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2019

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Optics and Measurement International Conference 2019. Proceedings of SPIE

ISBN

9781510635470

ISSN

0277-786X

e-ISSN

1996-756X

Počet stran výsledku

5

Strana od-do

1138505

Název nakladatele

SPIE

Místo vydání

Bellingham

Místo konání akce

Liberec

Datum konání akce

8. 10. 2019

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

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