A flexible robotic cell for in-process inspection of multi-pass welds

Lines, David and Javadi, Yashar and Mohseni, Ehsan and Vasilev, Momchil and MacLeod, Charles Norman and Mineo, Carmelo and Wathavana Vithanage, Randika Kosala and Qiu, Zhen and Zimermann, Rastislav and Loukas, Charalampos and Foster, Euan and Pierce, Gareth and Gachagan, Anthony (2020) A flexible robotic cell for in-process inspection of multi-pass welds. Insight: The Journal of the British Institute of Non-Destructive Testing, 62 (9). pp. 526-532. ISSN 1354-2575

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    Abstract

    Welds are currently only inspected after all the passes are complete and after allowing sufficient time for any hydrogen cracking to develop, typically over several days. Any defects introduced between passes are therefore unreported until fully buried, greatly complicating rework and also delaying early corrections to the weld process parameters. In-process inspection can provide early intervention but involves many challenges, including operation at high temperatures with significant gradients affecting acoustic velocities and, hence, beam directions. Reflections from the incomplete parts of the weld would also be flagged as lack-of-fusion defects, requiring the region of interest (ROI) to adapt as the weld is built up. The collaborative SIMPLE (SIngle Manufacturing PLatform Environment) project addresses these challenges by incorporating robotic inspection within a robotic tungsten inert gas (TIG) welding cell. This has been accomplished initially with commercial off-the-shelf ultrasonic phased arrays, but is flexible enough to adapt to future developments with solutions suitable for higher temperatures. The welding and inspection robots operate autonomously. The former can introduce deliberate defects to validate the latter, which uses 5 MHz 64-element phased arrays on high-temperature wedges to generate sector scans after each weld pass. The results are presented, confirming that the challenges have been addressed and demonstrating the feasibility of this approach.

    Creators(s): Lines, David, Javadi, Yashar ORCID logoORCID: https://orcid.org/0000-0001-6003-7751, Mohseni, Ehsan, Vasilev, Momchil, MacLeod, Charles Norman ORCID logoORCID: https://orcid.org/0000-0003-4364-9769, Mineo, Carmelo ORCID logoORCID: https://orcid.org/0000-0002-5086-366X, Wathavana Vithanage, Randika Kosala ORCID logoORCID: https://orcid.org/0000-0002-1023-2564, Qiu, Zhen ORCID logoORCID: https://orcid.org/0000-0002-6219-7158, Zimermann, Rastislav, Loukas, Charalampos, Foster, Euan, Pierce, Gareth ORCID logoORCID: https://orcid.org/0000-0003-0312-8766 and Gachagan, Anthony ORCID logoORCID: https://orcid.org/0000-0002-9728-4120;
    Item type:Article
    ID code:73957
    Keywords:robotic welding cells, non destructive evaluation, non destructive testing, Electrical engineering. Electronics Nuclear engineering, Materials Chemistry, Mechanics of Materials, Metals and Alloys, Mechanical Engineering
    Subjects:Technology > Electrical engineering. Electronics Nuclear engineering
    Department:Faculty of Engineering > Electronic and Electrical Engineering
    Strategic Research Themes > Advanced Manufacturing and Materials
    Technology and Innovation Centre > Sensors and Asset Management
    Depositing user: Pure Administrator
    Date deposited:23 Sep 2020 16:00
    Last modified:23 Oct 2020 05:14
    Related URLs:
    URI:https://strathprints.strath.ac.uk/id/eprint/73957
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