Stability analysis of the gas metal arc welding process based on acoustic emission technique
- Roca, A.S. 2
- Fals, H.C. 2
- Fernández, J.B. 1
- Adán, F.S. 1
- Macías, E.J. 1
-
1
Universidad de La Rioja
info
-
2
Universidad de Oriente - Santiago de Cuba
info
ISSN: 0950-7116
Datum der Publikation: 2009
Ausgabe: 23
Nummer: 3
Seiten: 173-180
Art: Artikel
beta Ver similares en nube de resultadosAndere Publikationen in: Welding International
Projekte im Zusammenhang
Zusammenfassung
A new criterion for stability analysis of the gas metal arc welding (GMAW) process is proposed and presented in this work, based on acoustic emission generated by the arc during short-circuiting metal transfer. For the experimental development an AWS ER70S-6 wire with a diameter of 0.8 mm and a DEP 401 rectifier were used. The weld bead was carried out on a 4-mm-thick AISI 1020 steel plate. Several welding conditions were studied with variation of the process parameters during the deposition of the beads. The acoustic emission signals were acquired using a measurement system composed of a MV-201 microphone, with a sensitivity of 10 ± 3 mV Pa -1 and frequency bandwidth of 20 Hz to 170 dB to 100 kHz, and a data acquisition card coupled to a PC. A stability index was proposed. Eventually, a statistical analysis for validation of the obtained experimental results was carried out. The outputs allowed obtained a relationship between the acoustic signals and the arc voltage signals. The feasibility of the proposed index, and the effectiveness of the method as a novel means of analysing the stability of arc welding, was demonstrated based on acoustic emission for analyses of GMAW process stability.