Eventos Anais de eventos
COBEM 2023
27th International Congress of Mechanical Engineering
“U” TYPE FOLDED STRUCTURAL PROFILE UNDER THE INFLUENCE OF DISTORTION DUE TO THE MAG WELDING PROCESS
Submission Author:
Josemairon Prado Pereira , SP , Brazil
Co-Authors:
Josemairon Prado Pereira, EDSON CAPELLO SOUSA, Gilberto Gonçalves, Jônatas Pereira, Bruno Agostinho Hernandez
Presenter: EDSON CAPELLO SOUSA
doi://10.26678/ABCM.COBEM2023.COB2023-0123
Abstract
In the industrial field of metallic structures, CSN-CIVIL-300 steel plates are widely used. Now, to obtain quality structural products, two elements must be within reliable limits, in the elaboration of the dimensional project: the development of the plates and the geometry of the profile. This study focuses on the geometric variation of the structural profile section produced by distortions arising from residual stresses, which, in the U-type bent structural profile, are susceptible to deformations. Thus, this work aims to present a method for this analysis, called the laser scanning technique focusing on the welding process MAG, with the use of the Motoman UP6 robotic arm, regarding the behavior of structural steel in relation to distortion on the soldered joint. In view of this, the U-type folded plate steel profile 100x50x3.04 mm was applied to the MIG/MAG welding process, in a butt joint, using the AWS ER70S-6 electrode wire in the horizontal position 2g. In this process, four types of experimental joints were used (with and without bridges), gas protection of 75%Ar-25%CO2, and welding parameters that allowed keeping the current density constant. The conventional method of measuring the dimensions of the reference samples was used. It was verified that the calculated nominal stress is guaranteed with a gap of 8%, while the lowest resistance is registered in the HAZ making the material with a deficiency of 6.5%, concluding that 97% of the analyzed bent profiles broke at a characteristic point. Keywords: Project; Folded sheet; Metallic structures; Manufacturing process.
Keywords
project, Projeto, Folded sheet, Chapa dobrada, Metallic Structures, Estruturas Metálicas, manufacturing process, processo de fabricação
