Detail publikace

New methods for monitoring laser welding process in the manufacture of solar absorbers

MRŇA, L. HORNÍK, P. KUBÍČEK, J.

Originální název

New methods for monitoring laser welding process in the manufacture of solar absorbers

Typ

článek v časopise ve Scopus, Jsc

Jazyk

angličtina

Originální abstrakt

Laser welding is a modern method of fusion welding. Due to high welding speeds is necessary to use the machinery welding. This leads to the need for the detection and eventually the elimination of weld defects. Penetration laser welding is not accessible to direct observation and therefore can be monitored only indirectly. A new of possibility is the study of plasma radiation forming over the keyhole using autocorrelation analysis. The intensity of plasma radiation approaching deterministic noise, therefore, commonly used FFT analysis does not produce satisfying results. The autocorrelation function finds repetitive sequences in the signal, which are related to the oscillation of the weld pool. Changes and irregularities in the frequency of these oscillations indicate weld defects and overall stability of the welding process. A series of welding experiments were studied. After the experiments, the autocorrelation functions were evaluated. Changes in frequency during the weld were related to the geometric characteristics of the weld.

Klíčová slova

laser welding, process monitoring, autocorrelation function

Autoři

MRŇA, L.; HORNÍK, P.; KUBÍČEK, J.

Vydáno

8. 11. 2016

Nakladatel

MM Science Journal

Místo

Praha

ISSN

1803-1269

Periodikum

MM Science Journal

Ročník

2016

Číslo

5

Stát

Česká republika

Strany od

1376

Strany do

1381

Strany počet

6

URL

https://www.mmscience.eu/journal/issues/november-2016/articles/new-methods-for-monitoring-laser-welding-process-in-the-manufacture-of-solar-absorbers

BibTex

@article{BUT170669,
  author="Libor {Mrňa} and Petr {Horník} and Jaroslav {Kubíček}",
  title="New methods for monitoring laser welding process in the manufacture of solar absorbers",
  journal="MM Science Journal",
  year="2016",
  volume="2016",
  number="5",
  pages="1376--1381",
  doi="10.17973/MMSJ.2016\{_}11\{_}2016125",
  issn="1803-1269",
  url="https://www.mmscience.eu/journal/issues/november-2016/articles/new-methods-for-monitoring-laser-welding-process-in-the-manufacture-of-solar-absorbers"
}