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Predicting arc pressure in GTAW for a variety of process parameters using a coupled sheath and LTE arc model

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Abstract

To date, several numerical models predicting the properties of TIG-arcs are available. Recently, effort has been put into testing the reliability of these models for varying process parameters by means of comparing plasma temperatures and arc voltages against measured data. However, from an engineering point of view, the goal of these models is to predict the properties of weld beads. Therefore, the heat input into and the pressure applied onto the workpiece have to be predicted. This paper deals with the comparison of measured arc pressure data and the results of an approach which couples a simplified cathode sheath model with an LTE arc model.

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Authors and Affiliations

  1. Institute of Manufacturing Technology, Dresden University of Technology, Dresden, Germany

    M. Lohse, M. Trautmann, M. Hertel & U. Füssel

  2. Linde AG, Unterschleißheim, Germany

    E. Siewert

Authors
  1. M. Lohse
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  2. M. Trautmann
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  3. E. Siewert
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  4. M. Hertel
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  5. U. Füssel
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Correspondence to M. Lohse.

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Recommended for publication by Study Group 212 - The Physics of Welding

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Lohse, M., Trautmann, M., Siewert, E. et al. Predicting arc pressure in GTAW for a variety of process parameters using a coupled sheath and LTE arc model. Weld World 62, 629–635 (2018). https://doi.org/10.1007/s40194-018-0559-9

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  • DOI: https://doi.org/10.1007/s40194-018-0559-9

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