Method for arc welding fault detection

Details Method for arc welding fault detection Method for arc welding fault detection

1996-05-24

1998-05-12

Shaw, Clifford C.

Electric heating

Metal heating

By arc

21913021, B23K 9095

Patent

active

057509573

ABSTRACT:
A method for sensing and controlling the weld quality of gas metal arc welding employs sampling of the welding current and voltage signals and making determinations of the weld quality state based on information embedded in those signals. The signals are processed such that the quality of the weld can be determined and the appropriate steps are taken to respond to the detected quality level. If the quality level is deemed unacceptable the process is terminated and the operator is alerted. The method includes determinations based on the standard deviation of the electrical signal, the summed power spectrum of the electrical signal, and/or the average absolute value of the time derivative of the electrical signal.

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patent: 3792225 (1974-02-01), Needham et al.
patent: 4605836 (1986-08-01), Retfalvi et al.
patent: 5221825 (1993-06-01), Siewert et al.
patent: 5349156 (1994-09-01), Madigan et al.

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