:: Artigo completo: https://doi.org/10.1007/s00170-024-14825-9
Abstract
This study presents an advancement in the manufacturing of large-scale metallic parts through 3D printing, utilizing Wire Arc Additive Manufacturing (WAAM) technology with a proprietary GMAW Dynamic Feed (GMAW DF) power source (MIG-AD). One of the challenges in this process is maintaining the geometry of the part, particularly at the start and end of the weld beads. Three steel walls were fabricated using 1.2-mm ER70S-6 wire, allowing for the comparison of techniques to minimize these deformations. A bidirectional deposition strategy was employed, testing two distinct approaches. The first technique involved maintaining material deposition for 0.5 s at the end of the bead, while the second technique applied the same duration of deposition at the start of the bead, aiming to compensate for the height at these points. Comparisons were made with a control test without applying these techniques. The results of profilometry 3D indicated that maintaining deposition at the end of the bead resulted in greater deformation. In contrast, the technique of maintaining deposition at the start of the bead significantly improved the part’s geometry. Based on this result, it was possible to fabricate a 60-mm high wall without significant deformations.
Keywords:WAAM; GMAW DF; Geometry; Steel walls; Profilometry 3D
Referência:
PEREIRA, A.S.; COSTENARO, F.; GONÇALVES E SILVA, R.H.; MARQUES, C.. Control strategy for geometry at the start and end of bead in WAAM steel walls using a custom GMAW DF power source (MIG-AD). Int J Adv Manuf Technol (2024). https://doi.org/10.1007/s00170-024-14825-9