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

Result code in 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>
Result on the web
<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>

Result language
angličtina
Original language name
Study of the influence of focal position on back-reflected radiation during deep penetration laser welding and its simulation
Original language description
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.
Czech name
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Czech description
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Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection
Optics and Measurement International Conference 2019. Proceedings of SPIE
ISBN
9781510635470
ISSN
0277-786X
e-ISSN
1996-756X
Number of pages
5
Pages from-to
1138505
Publisher name
SPIE
Place of publication
Bellingham
Event location
Liberec
Event date
Oct 8, 2019
Type of event by nationality
EUR - Evropská akce
UT code for WoS article
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