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Deep-learning based supervisory monitoring of robotized DE-GMAW process through learning from human welders

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Abstract

Double-electrode gas metal arc welding (DE-GMAW) modifies GMAW by adding a second electrode to bypass a portion of the current flowing from the wire. This reduces the current to, and the heat input on, the workpiece. Successful bypassing depends on the relative position of the bypass electrode to the continuously varying wire tip. To ensure proper operation, we propose robotizing the system using a follower robot to carry and adaptively adjust the bypass electrode. The primary information for monitoring this process is the arc image, which directly shows desired and undesired modes. However, developing a robust algorithm for processing the complex arc image is time-consuming and challenging. Employing a deep learning approach requires labeling numerous arc images for the corresponding DE-GMAW modes, which is not practically feasible. To introduce alternative labels, we analyze arc phenomena in various DE-GMAW modes and correlate them with distinct arc systems having varying voltages. These voltages serve as automatically derived labels to train the deep-learning network. The results demonstrated reliable process monitoring.

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Funding

This work is funded by the National Science Foundation under Grant No. 2024614.

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Authors and Affiliations

  1. Department of Electrical and Computer Engineering and Institute for Sustainable Manufacturing, University of Kentucky, Lexington, KY, 40506, USA

    Rui Yu, Yue Cao & YuMing Zhang

  2. Toyota Motor North America, 1001 Cherry Blossom Way, Georgetown, KY, 40324, USA

    Jennifer Martin & Otto Chiang

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  1. Rui Yu
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  2. Yue Cao
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  3. Jennifer Martin
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  4. Otto Chiang
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Correspondence to YuMing Zhang.

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Yu, R., Cao, Y., Martin, J. et al. Deep-learning based supervisory monitoring of robotized DE-GMAW process through learning from human welders. Weld World 68, 781–791 (2024). https://doi.org/10.1007/s40194-023-01635-y

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  • DOI: https://doi.org/10.1007/s40194-023-01635-y

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