Uso combinado das técnicas DOE e simulação de Monte Carlo em um processo de soldagem MIG/MAG pulsado

Abstract

The DOE utilization, although with several positive results, sometimes the results variances are not always predicted. Therefore, to predict these variations would be extremely important in order to produce more effective practical results. An alternative to achieve this is to associate statistical methodologies, which allows a simultaneous analysis and also considering the process variability inherent to the process. Due to this, this paper aims to analyze , using the DOE together with the Monte Carlo Simulation applied on a real case study on the pulsed GMAW welding. The study is focused on the influence on the diluition, penetration, welding bead convexity and welding splatters caused by the pulse parameters adjusting, like peak current, base current, duty cicle and wire feeding speed. With that, the aim is to determine the configurations to ensure that the occurrence interval for the results are close to the best regarding the geometrical aspects of the pulsed GMAW welding. This paper will also consider the costs variation on the studied process, again considering the variability on the found responses thru Monte Carlo Simulation. For that, is was used a protective atmosphere of pure Argon compared with Argon +25% CO2.