Publication detail

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

MRŇA, L. HORNÍK, P. KUBÍČEK, J.

Original Title

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

Type

journal article in Scopus

Language

English

Original Abstract

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.

Keywords

laser welding, process monitoring, autocorrelation function

Authors

MRŇA, L.; HORNÍK, P.; KUBÍČEK, J.

Released

8. 11. 2016

Publisher

MM Science Journal

Location

Praha

ISBN

1803-1269

Periodical

MM Science Journal

Year of study

2016

Number

5

State

Czech Republic

Pages from

1376

Pages to

1381

Pages count

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"
}