Eventos Anais de eventos
COBEM 2021
26th International Congress of Mechanical Engineering
Analysis of process parameters influence on quality performance and energy consumption of resistance spot-welding
Submission Author:
Carla Ferreira Andrade Cunha , SP , Brazil
Co-Authors:
Carla Ferreira Andrade Cunha, Fábio do Monte Sena, jefferson de oliveira gomes
Presenter: Carla Ferreira Andrade Cunha
doi://10.26678/ABCM.COBEM2021.COB2021-1452
Abstract
Resistance spot welding is widely used in the automotive sector. The high production volumes - 2 million in 2020 in Brazil - lead to huge quantities of welds manufactured, since there are 4,000 to 6,000 spot welds in a passenger vehicle. Inspection limitations and few backgrounds of the quality-energy consumption relationship lead the industry to waste and high operational costs. In this regard, this study aims to evaluate quality aspects simultaneously to energy consumption. For this purpose, a design of experiments together with statistical analysis was performed. Spot welds samples were conducted using two CR4 steel sheets with 0.7 mm thickness welded in a low-frequency machine. The influence of the following process parameters: welding current, welding time, and electrode force were investigated. Energy consumption was measured for each sample, subsequently subjected to a tensile-shear test. The factors with the greatest influence on the quality aspects were welding current, time, and the interaction between current and force, responsible for changing the electrical resistance conditions of the system. Energy consumption was influenced by current, time, and its interaction. The result of this work provides to spread good practices for real applications in the industrial environment.
Keywords
Resistance Spot Welding, Energy consumption, Efficiency, ANOVA, Statistical Analysis
