Estudo da influência da adição de arame frio ao processo MIG/MAG aplicado à manufatura aditiva

Abstract

Additive manufacturing processes have emerged as possible solutions to meet the requirements of greater flexibility and shorter production time, as well as greater resource savings. The present work aims to verify the suitability of carrying out the additive manufacturing process by means of MIG/MAG welding with the addition of cold wire applied to the fabrication of a wall formed from layers deposited with carbon steel. Also, it was tried to verify the influence of the increase of the speed of cold wire feed on the level of deposition efficiency. Tests were carried out in order to achieve the highest deposition rate of carbon steel layers, using the conventional MIG/MAG process with the addition of cold wire. The layer deposition process was evaluated with superimposed layers, in the form of a wall. The experimental bench was assembled and adjusted to meet the needs of this work with a welding robot, a MIG/MAG welding station, a cold wire feeder and a wire guide. The results showed that the approach presents a suitable and advantageous practice, which allows achieving higher deposition rates and lower dilution levels for the same welding energy compared to the condition without addition of cold wire. At the same time, the cold wire addition technique makes it possible to maintain the required quality of the deposited walls.