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Improvement strategy for the geometric accuracy of bead’s beginning and end parts in wire-arc additive manufacturing (WAAM)

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Abstract

Cold metal transfer (CMT)-based wire-arc additive manufacturing (WAAM) is a promising method for the production of large-scale and complex metallic parts because of its high efficiency, less heat input and low cost. However, a critical and common problem with the arc welding processes is the irregular geometry at the beginning and end parts of the bead due to the ignition and extinction of the arc. Based on experimental investigations of the irregularities and different possible optimization methods, an improvement strategy consisting of configurations with a varying travel speed and an extra return path is presented in this paper. Experimental results show that this strategy can effectively enhance the geometric accuracy at the beginning and end parts of different single beads. In the manufacturing of a thin-wall part and a multi-pass cladding, the improvement of geometric accuracy has also been achieved by this strategy.

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Acknowledgements

The authors would like to thank M. Sylvio de Paolis and M. Daniel Boehm for their support and investment during the experimental work, as well as the CPER (State-Region contract) Cyber-Enterprises and the Grand Est Region funding plans.

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Authors and Affiliations

  1. Université de Lorraine, Arts et Metiers Institute of Technology, LCFC, HESAM Université, F-57070, Metz, France

    Zeya Wang, François Léonard & Gabriel Abba

  2. Arts et Metiers Institute of Technology, Université de Lorraine, LCFC, HESAM Université, F-57070, Metz, France

    Sandra Zimmer-Chevret

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  1. Zeya Wang
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Correspondence to Zeya Wang.

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Wang, Z., Zimmer-Chevret, S., Léonard, F. et al. Improvement strategy for the geometric accuracy of bead’s beginning and end parts in wire-arc additive manufacturing (WAAM). Int J Adv Manuf Technol 118, 2139–2151 (2022). https://doi.org/10.1007/s00170-021-08037-8

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