Stability analysis of the gas metal arc welding process based on acoustic emission technique

  1. Roca, A.S. 2
  2. Fals, H.C. 2
  3. Fernández, J.B. 1
  4. Adán, F.S. 1
  5. Macías, E.J. 1
  1. 1 Universidad de La Rioja
    info

    Universidad de La Rioja

    Logroño, España

    ROR https://ror.org/0553yr311

  2. 2 Universidad de Oriente - Santiago de Cuba
    info

    Universidad de Oriente - Santiago de Cuba

    Santiago de Cuba, Cuba

    ROR https://ror.org/03kqap970

Revista:
Welding International

ISSN: 0950-7116

Año de publicación: 2009

Volumen: 23

Número: 3

Páginas: 173-180

Tipo: Artículo

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DOI: 10.1080/09507110802543385 SCOPUS: 2-s2.0-67650630276 GOOGLE SCHOLAR

Otras publicaciones en: Welding International

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Resumen

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.