Adaptive feedback beam shaping of the CO2 welding laser

D 2010

Adaptive feedback beam shaping of the CO2 welding laser

JEDLIČKA, Petr; Libor MRŇA; Šimon ŘEŘUCHA a Martin ŠARBORT

Základní údaje

Originální název

Adaptive feedback beam shaping of the CO2 welding laser

Autoři

JEDLIČKA, Petr; Libor MRŇA; Šimon ŘEŘUCHA a Martin ŠARBORT

Vydání

San Diego, CA, LASER BEAM SHAPING IX in, od s. 77890V:1-6, 6 s. 2010

Nakladatel

PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) Volume: 7789

Další údaje

Jazyk

angličtina

Typ výsledku

Stať ve sborníku

Obor

20201 Electrical and electronic engineering

Stát vydavatele

Česká republika

Utajení

není předmětem státního či obchodního tajemství

Označené pro přenos do RIV

Organizační jednotka

Fakulta informatiky

ISBN

978-0-8194-8285-3

DOI

https://doi.org/10.1117/12.8606

UT WoS

000287705600025

Klíčová slova anglicky

laser beam shaping; laser beam welding; adaptive control

Změněno: 13. 4. 2012 12:55, Mgr. Šimon Řeřucha, Ph.D.

Anotace

V originále

The depth of penetration is probably the most important factor that influences the quality of a laser weld. The depth strongly depends on the focus of the welding beam. The sublimating material forms plasma vapors, that act as a lens and defocus the laser beam. Our contribution presents a method to compensate this phenomenon using an adaptive mirror - a mirror with flexible surface that can adjust the shape of the welding beam. The mirror is regulated by a feedback control loop so that the focus of the laser beam and the penetration depth remain in an optimal range. Since the only possibility to state the penetration depth is to monitor outer effects to estimate desired parameters. a sensor unit is used to monitor the optical emissions of the plasma vapors and the measured data are inputs to an algorithm that estimates the penetration depth. We have done several experiments that study the relation of the adaptive mirror focus and the laser beam shape and how it influences the penetration depth. The estimation results are compared with material samples from test welds. On the basis of these experiments, a preliminary version of a control system was developed and a tested. The tests has shown that the implementation of the control system has positive influence on the quality of the resulting weld.

Citovat

JEDLIČKA, Petr; Libor MRŇA; Šimon ŘEŘUCHA a Martin ŠARBORT. Adaptive feedback beam shaping of the CO2 welding laser. In LASER BEAM SHAPING IX in. San Diego, CA,: PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) Volume: 7789, 2010, s. 77890V:1-6, 6 s. ISBN 978-0-8194-8285-3. Dostupné z: https://doi.org/10.1117/12.8606.

@inproceedings{903550,
   author = {Jedlička, Petr and Mrňa, Libor and Řeřucha, Šimon and Šarbort, Martin},
   address = {San Diego, CA,},
   booktitle = {LASER BEAM SHAPING IX in},
   doi = {https://doi.org/10.1117/12.8606},
   keywords = {laser beam shaping; laser beam welding; adaptive control},
   language = {eng},
   location = {San Diego, CA,},
   isbn = {978-0-8194-8285-3},
   pages = {77890V:1-6},
   publisher = {PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) Volume: 7789},
   title = {Adaptive feedback beam shaping of the CO2 welding laser},
   year = {2010}
}

TY  - CONF
ID  - 903550
AU  - Jedlička, Petr - Mrňa, Libor - Řeřucha, Šimon - Šarbort, Martin
PY  - 2010
TI  - Adaptive feedback beam shaping of the CO2 welding laser
PB  - PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) Volume: 7789
CY  - San Diego, CA,
SN  - 9780819482853
KW  - laser beam shaping
KW  - laser beam welding
KW  - adaptive control
N2  - The depth of penetration is probably the most important factor that influences the quality of a laser weld. The depth strongly depends on the focus of the welding beam. The sublimating material forms plasma vapors, that act as a lens and defocus the laser beam. Our contribution presents a method to compensate this phenomenon using an adaptive mirror - a mirror with flexible surface that can adjust the shape of the welding beam. The mirror is regulated by a feedback control loop so that the focus of the laser beam and the penetration depth remain in an optimal range. Since the only possibility to state the penetration depth is to monitor outer effects to estimate desired parameters. a sensor unit is used to monitor the optical emissions of the plasma vapors and the measured data are inputs to an algorithm that estimates the penetration depth. We have done several experiments that study the relation of the adaptive mirror focus and the laser beam shape and how it influences the penetration depth. The estimation results are compared with material samples from test welds. On the basis of these experiments, a preliminary version of a control system was developed and a tested. The tests has shown that the implementation of the control system has positive influence on the quality of the resulting weld.
ER  -

JEDLIČKA, Petr; Libor MRŇA; Šimon ŘEŘUCHA a Martin ŠARBORT. Adaptive feedback beam shaping of the CO2 welding laser. In \textit{LASER BEAM SHAPING IX in}. San Diego, CA,: PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) Volume: 7789, 2010, s.~77890V:1-6, 6 s. ISBN~978-0-8194-8285-3. Dostupné z: https://doi.org/10.1117/12.8606.

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