Eventos Anais de eventos
COBEM 2023
27th International Congress of Mechanical Engineering
Parametrization of GMAW Welding With Switchback Technique Using Mechanized Movement System
Submission Author:
Rodrigo Oliveira de Sousa , PA , Brazil
Co-Authors:
Rodrigo Oliveira de Sousa, Thiago Farias, João Pamplona, Carlos Mota
Presenter: Rodrigo Oliveira de Sousa
doi://10.26678/ABCM.COBEM2023.COB2023-1922
Abstract
The Switchback torch movement technique, applied in the Gas Metal Arc Welding (GMAW) process, consists of a controlled back-and-forth motion in the direction of the weld bead. This periodic oscillation aims to improve the granular structure of the molten metal. Although the approach is relatively recent and usually employs adapted welding robots, it was not possible to use a robotized mechanism to apply the technique in the laboratory where the research was conducted. To circumvent this limitation, linear torch movement equipment already available in the laboratory was used, developing an adaptation with two overlaid motion mechanisms. This alternative solution allowed the application of the Switchback technique, even in the absence of specific robots, contributing to the improvement of the granular structural quality of the weld metal and expanding knowledge about the technique in question. Since it is an adaptation, the definition of parameters for performing the GMAW process with Switchback needs to be structured to result in precise movements, with advance and return distances, speeds, and other previously established variables. Aiming to facilitate the acquisition of parameters for the process using the mechanized system, an input variable insertion system was developed for the operating ranges of the mechanism, thus generating responses that can be more easily visualized and controlled for research application purposes with higher reliability and repeatability of the pieces. Based on the known formulation, it is possible to create a table that presents precise advance and return lengths as a result, as well as their speeds and other variables inherent to the technique. The graphs generated after the appropriate formulations also allow understanding how these variables interrelate, thus enabling better parameter control, depending on the research line or necessary objective. At the conclusion of the work, weld beads were made using the selected parameters to verify the applicability of the results and conditions such as repeatability and stability of both the arc and the table with the double-tartílope system. The importance of this work lies in its contribution to advancing welding research, enabling greater efficiency and precision in GMAW processes with Switchback. Moreover, the development of a mechanized system and improved parameters can positively impact the industry, enhancing weld quality and increasing the reliability of welded components.
Keywords
switchback, GMAW, Welding parameters, Drive Mechanism, Forward, Backward
