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By R Shaw
Arc welding is currently monitored in-process primarily by relatively simple parametric monitoring or by visual inspection by a welding operator. These methods have certain weaknesses, and it would be preferable to find a more capable in-process monitoring method. This report reviews several possible options and their respective capabilities. These are more comprehensive parametric analysis, acoustic emission analysis and automated visual assessment.
Typical images of stainless steel TIG welding under different conditions: a) Excessive travel speed; b) Lack of fusion; c) Contamination; d) Lack of shielding gas; e) Burn-through; f) Optimal conditions.
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