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VISION-BASED IDENTIFICATION MODEL OF WELDING POOL WIDTH DYNAMIC RESPONDENCE IN ALUMINUM ALLOY PULSED MIG PROCESS |
SHI Yu; FAN Ding; HUANG An; CHEN Jianhong |
State Key Laboratory of Gansu Advanced Non-ferrous Metal Materials;Lanzhou University of Technology; Lanzhou 730050 |
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Cite this article:
SHI Yu; FAN Ding; HUANG An; CHEN Jianhong. VISION-BASED IDENTIFICATION MODEL OF WELDING POOL WIDTH DYNAMIC RESPONDENCE IN ALUMINUM ALLOY PULSED MIG PROCESS. Acta Metall Sin, 2005, 41(9): 994-998 .
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Abstract A vision sensing system for taking and processing the image of MIG welding pool of aluminum alloy has been setup in this paper.
The morphological operator which can effectively wipe off noise and cathode pulverization' area in image was used to process the image of the aluminum alloy MIG welding pool. Based on the step response experiment, the welding pool width model of dynamic process in aluminum alloy pulsed MIG welding is identified by least square method. The input parameters of the model are
welding wire speed, base current and pulse duty ratio, and the output is beam width of
welding pool. The influence of wire speed, base current and pulse duty ratio on welding
pool width is analyzed, which provides the
theoretical basis to realize the intelligent
control for aluminum alloy pulsed MIG welding process.
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Received: 22 February 2005
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