TORCH end-effector and TIG electrode changeout design for a TIG welding robot used in metal big area additive manufacturing

Christopher Masuo, Andrzej Nycz, Mark W. Noakes, Jared Bell, Justin Killian, Chandler Oakley, William R. Hamel

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Metal Big Area Additive Manufacturing (mBAAM) is a promising approach to large-scale metal additive manufacturing (AM) or 3D printing. The mBAAM system uses an arc-based wire-fed welding robot to build metal parts. A multi-degree-of-freedom robotic arm is known for its extensive range of motion and reliable tool handling. Attaching a torch end-effector to a robotic arm gives it welding capabilities; however, this decreases the motion range and dynamics of the robot. As a result, build volume and printing accuracy are decreased. Additionally, only a portion of time is spent printing in an arc-based process. Maintenance leads to downtime on the system. In a tungsten inert gas (TIG)-based process, the torch electrode wears out over time and must be changed to avoid defective deposition. This paper proposes an approach for a compact torch end-effector to improve the robot's build volume. This paper also proposes an approach to reducing non-printing process time by designing and implementing a semi-automated electrode changing system.

Original languageEnglish
Title of host publicationAdvanced Manufacturing
PublisherAmerican Society of Mechanical Engineers (ASME)
ISBN (Electronic)9780791852019
DOIs
StatePublished - 2018
EventASME 2018 International Mechanical Engineering Congress and Exposition, IMECE 2018 - Pittsburgh, United States
Duration: Nov 9 2018Nov 15 2018

Publication series

NameASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE)
Volume2

Conference

ConferenceASME 2018 International Mechanical Engineering Congress and Exposition, IMECE 2018
Country/TerritoryUnited States
CityPittsburgh
Period11/9/1811/15/18

Funding

Notice of Copyright This manuscript has been authored by UT-Battelle, LLC under Contract No. DE-AC05-00OR22725 with the U.S. Department of Energy. The United States Government retains and the publisher, by accepting the article for publication, acknowledges that the United States Government retains a non-exclusive, paid-up, irrevocable, world-wide license to publish or reproduce the published form of this manuscript, or allow others to do so, for United States Government purposes. The Department of Energy will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan (http://energy.gov/downloads/doe-public-access-plan).

FundersFunder number
Knoxville’s Department of Mechanical, Aerospace, and Biomedical Engineering
U.S. Department of Energy
Advanced Manufacturing OfficeDE-AC05-00OR22725
Office of Science
Office of Energy Efficiency and Renewable Energy
University of Tennessee

    Keywords

    • 3D Printing
    • Electrode Changeout Design
    • Metal Big Area Additive Manufacturing
    • Robotic Welding Arm
    • Torch End-Effector Design

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