Avaliação de parâmetros e utilização do tempo de parada na qualidade construtiva de uma peça de alumínio fabricada por manufatura aditiva por deposição a arco
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2023-08-14
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An aspect of the Additive Manufacturing (AM) manufacturing process that has been widespread in the Biomedical, Automobile and Aerospace industries is the Wire Arc Additive Manufacturing (WAAM). WAAM consists in the manufacture of metallic components from the deposition of multilayers of weld beads on a substrate, that is, from a three-dimensional model, the object is divided into layers, defining the trajectory in which the addition of metal, performing it by means of a robotic manipulator. The AM has advantages when compared to other manufacturing processes, such as conventional machining, such as a high deposition rate, less material waste, and the possibility of manufacturing complex parts of large proportions. However, it has been facing some challenges to become sufficiently mature and to be applied on a large scale in the industry, thus demanding a series of studies and research for its consolidation and maturation. The objective of this work was to contribute to this maturation through the evaluation of the influence of the parameters used in the manufacture by the WAAM process of an aluminum part with a relatively complex profile and the evaluation of the influence of the use of stop between layers in the manufacture of this part. For this, a pulsed GMAW (Gas Metal Arc Welding) welding system was used coupled to a Yaskawa Motoman HP20D-A80 robotic manipulator, with ER4043 aluminum wires of 1.2 mm in diameter. After programming the trajectories, preliminary tests were carried out in the format of an airfoil, having as standardized parameters the Contact Tip to Work Distance (CTWD) in 18 mm and the rise GAP in 0.5 mm and as varied parameters the deposition velocity (cm/min), the welding current in synergic mode (A) and the pure argon gas flow rate (L/min). Next, two airfoils were manufactured with 100 layers each, the first without stopping and the second with a 30-second stop between each layer, to perform a dimensional analysis and compare the time spent in the manufacture, height, thickness, porosity, and surface finish.
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Manufatura Aditiva (MA), Manufatura aditiva por deposição a arco (MADA), GMAW, Tempo de parada, Alumínio, Additive Manufacturing (AM), Wire Arc Additive Manufacturing (WAAM), GMAW, Stop time, Aluminum
Citação
SILVA,Felipe Cardoso Tavares. Avaliação de parâmetros e utilização do tempo de parada na qualidade construtiva de uma peça de alumínio fabricada por manufatura aditiva por deposição a arco. 2023. 62 f. Trabalho de Conclusão de Curso (Bacharelado em Engenharia Mecânica) - Escola de Engenharia Elétrica, Mecânica e de Computação, Universidade Federal de Goiás, Goiânia, 2023.