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

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F16%3APU140277" target="_blank" >RIV/00216305:26210/16:PU140277 - isvavai.cz</a>

Result on the web

<a href="https://www.mmscience.eu/journal/issues/november-2016/articles/new-methods-for-monitoring-laser-welding-process-in-the-manufacture-of-solar-absorbers" target="_blank" >https://www.mmscience.eu/journal/issues/november-2016/articles/new-methods-for-monitoring-laser-welding-process-in-the-manufacture-of-solar-absorbers</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.17973/MMSJ.2016_11_2016125" target="_blank" >10.17973/MMSJ.2016_11_2016125</a>

Result language

angličtina

Original language name

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

Original language description

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.

Czech name

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Czech description

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Type

J_SC - Article in a specialist periodical, which is included in the SCOPUS database

CEP classification

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OECD FORD branch

20301 - Mechanical engineering

Project

—

Continuities

S - Specificky vyzkum na vysokych skolach

Publication year

2016

Confidentiality

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

Name of the periodical

MM Science Journal

ISSN

1803-1269

e-ISSN

1805-0476

Volume of the periodical

2016

Issue of the periodical within the volume

5

Country of publishing house

CZ - CZECH REPUBLIC

Number of pages

6

Pages from-to

1376-1381

UT code for WoS article

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EID of the result in the Scopus database

2-s2.0-84995615160