Abstract
Most of the inspection methods used for detection and localization of welding disturbances are based on the evaluation of some direct measurements of welding parameters. This direct measurement requires an insertion of sensors during the welding process which could somehow alter the behavior of the metallic transference. An inspection method that evaluates the GMA welding process evolution using a non-intrusive process sensing would allow not only the identification of disturbances during welding runs and thus reduce inspection time, but would also reduce the interference on the process caused by the direct sensing. In this paper a nonintrusive method for weld disturbance detection and localization for weld quality evaluation is demonstrated. The system is based on the acoustic sensing of the welding electrical arc. During repetitive tests in welds without disturbances, the stability acoustic parameters were calculated and used as comparison references for the detection and location of disturbances during the weld runs.
Highlights
Welding is the most used manufacturing process in the metallic construction industry
Arc voltage and sound pressure signals were tested for monitoring the welding process
The monitoring of the GMAW-S process by digital analysis of acoustical welding parameters enables one to detect disturbances related to phenomena that take place in the welding arc and can influence its stability
Summary
Received: 3 June 2009; in revised form: 23 July 2009 / Accepted: 18 August 2009 /
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