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Abstract: Gas metal arc welding (GMAW) is widely used in automatic
welding especially in robotic welding. The quick response characteristic
in robotic welding requires the on line automatic monitoring as well as
documentation of welding quality. The electrical signal of welding
process is used in order to realize the on line identification of weld
quality by processing the electrical parameters. By first analyzing the
results of statistical process control, it is found that the method has
its limitation. The multivariate statistical process control method is
put forward to realize the on line monitoring of weld quality.
Experiments have verified its feasibility.
Key words: Gas metal arc welding Statistical process control
Multivariate statistical process control On line monitoring
CLC No: TP278
TG44
国家自然科学基金(50005007)和广东省自然科学基金(990550)资助项目. Received 20020703, received in
revised form 20021009
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