Avaliação de potencialidades do processo de soldagem TIG-MIG/MAG com variação de polaridade no eletrodo MIG/MAG
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Data
2019-07-15
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Editor
Universidade Federal de Goiás
Resumo
This study proposes a contribution to the improvement of production
processes through the study of hybrid welding processes. It aims to
evaluate the effects provided by the association of two conventional
welding processes on the behavior of the welding voltage and current
signals, on the production capacity and on the geometry of the weld
obtained. In this case, the arc welding processes TIG (Tungsten Inert
Gas) and MIG/MAG (Metal Inert Gas / Metal Active Gas) are
associated and give rise to the TIG-MIG/MAG process. The tests were
performed following a factorial planning, through simple deposition in
SAE 1020 steel plates of 6.35 mm thickness. Experiments were
performed varying the polarity of the MIG/MAG part of the process
and the current of the TIG part of the process. The data of the voltage
and current signals of the TIG-MIG/MAG process demonstrated that at
the moment of insertion of the MIG/MAG arc in the process, the
signals realigned their intensities in order to stabilize the process. The
productive capacity analysis showed that the TIG-MIG/MAG process
with the MIG/MAG electrode in direct polarity has better rates of
deposition and fusion, if compared with the results obtained for
conventional polarity. Through the analysis of variance it was
identified that MIG/MAG polarity is the most influential factor in the
results of weld bead geometry. The TIG-MIG/MAG process with theMIG/MAG electrode in direct polarity can generate larger widths,
penetrations and molten areas and smaller reinforcements when
compared to the conventional MIG/MAG process in direct polarity,
opening the possibility of welding in this polarity. And finally, the
presence of the TIG arc was able to reduce the convexity of the weld
beads, regardless of the polarity.
Descrição
Palavras-chave
Soldagem híbrida, TIG-MIG/MAG, Parâmetros de soldagem, Geometria de cordão de solda, Hybrid welding, TIG-MIG / MAG, Welding parameters, Weld bead geometry
Citação
COSTA, G. C. S. Avaliação de potencialidades do processo de soldagem TIG-MIG/MAG com variação de polaridade no eletrodo MIG/MAG. 2019. 118 f. Dissertação (Mestrado em Engenharia de Produção) - Universidade Federal de Goiás, Catalão, 2019.