New stability index for short circuit transfer mode in GMAW process using acoustic emission signals

A new index for the analysis of stability of GMAW processes taking as a base the acoustic emission generated by the arc during the short circuit metal transfer is presented in the present work. The incidence of parameters of process is analysed in the indices of the acoustic emission signal, as well...

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Bibliographic Details
Published inScience and technology of welding and joining Vol. 12; no. 5; pp. 460 - 466
Main Authors Roca, A. Sánchez, Fals, H. Carvajal, Fernández, J. Blanco, Macías, E. Jiménez, Adán, F. Sanz
Format Journal Article
LanguageEnglish
Published London, England Taylor & Francis 01.07.2007
SAGE Publications
Subjects
ACOUSTIC EMISSION
ARC STABILITY
GAS METAL ARC WELDING
SHORT CIRCUIT TRANSFER MODE
SIGNAL PROCESSING
ACOUSTIC EMISSION
SHORT CIRCUIT TRANSFER MODE
SIGNAL PROCESSING
ARC STABILITY
GAS METAL ARC WELDING
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Summary:A new index for the analysis of stability of GMAW processes taking as a base the acoustic emission generated by the arc during the short circuit metal transfer is presented in the present work. The incidence of parameters of process is analysed in the indices of the acoustic emission signal, as well as its influence on the stability, evaluated through a new proposed index. The results obtained allowed having a relationship between acoustic signals and arc voltage signals, and demonstrated the validity of proposed index of acoustic emission for analysis of stability of GMAW process. The obtained results were then compared with other classic stability analysis methods based on statistical analysis of temporal signals of arc voltage. Finally a statistical analysis for the validation of the obtained experimental results was carried out. As a result of the investigation, the effectiveness of the method proposed as a new way for the analysis of stability is demonstrated. The research can contribute towards a new standard to evaluate the stability in welding processes.
ISSN:1362-1718
1743-2936
DOI:10.1179/174329307X213882