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J. Manuf. Mater. Process. 2017, 1(2), 14; doi:10.3390/jmmp1020014

Optimizing the Parameters of TIG-MIG/MAG Hybrid Welding on the Geometry of Bead Welding Using the Taguchi Method

1
Department of Mechanical Engineering, Faculty Horizontina —FAHOR, Horizontina, Rio Grande do Sul 98920-000, Brazil
2
Metal Forming Laboratory (LdTM), Metallurgical and Materials Engineering (PPGE3M), Post-Graduation Program in Mining, Department of Engineering, Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, Rio Grande do Sul 91509-900, Brazil
3
IMED—Meridional College/PPGEC, Passo Fundo, Rio Grande do Sul 91509-900, Brazil
*
Author to whom correspondence should be addressed.
Received: 17 September 2017 / Revised: 3 October 2017 / Accepted: 10 October 2017 / Published: 12 October 2017
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Abstract

The main aim of this work was to evaluate the influence and optimize the factors of the TIG-MIG/MAG hybrid welding process on the geometry of the weld bead. An experimental design using the Taguchi methodology (robust design method) was used to conduct the experiments. The experiments were carried out according to an orthogonal matrix with 27 experiments, with three replicates each, totaling 81 test specimens. The factors (MIG/MAG shielding gas type, MIG/MAG voltage, MIG/MAG wire feed, gas flow rate of TIG, electric current intensity of TIG and welding speed) were varied with three levels each. Penetration, heat-affected zone (HAZ), bead width and bead height were the response variables analyzed. The results showed that the penetration was significantly influenced by the MIG/MAG wire feed, MIG/MAG shielding gas type, MIG/MAG voltage and welding speed. The HAZ has been influenced by MIG/MAG voltage, MIG/MAG shielding gas type, welding speed and electric current intensity of TIG. All factors had effects on the width, except the MIG/MAG wire feed. The bead height was significantly influenced by the MIG/MAG wire feed and by the electric current intensity of TIG. Optimizing the process was performed, so that for each output variable, the values of the factors that should be used were indicated, and the optimization was confirmed by welding test specimens. View Full-Text
Keywords: optimization; hybrid welding TIG-MIG/MAG; weld bead geometry; Taguchi optimization; hybrid welding TIG-MIG/MAG; weld bead geometry; Taguchi
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Schneider, C.F.; Lisboa, C.P.; Silva, R.A.; Lermen, R.T. Optimizing the Parameters of TIG-MIG/MAG Hybrid Welding on the Geometry of Bead Welding Using the Taguchi Method. J. Manuf. Mater. Process. 2017, 1, 14.

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J. Manuf. Mater. Process. EISSN 2504-4494 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
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