Aplicação de delineamento de experimentos para o processo de solda à projeção

Abstract

This work is an application of the Design and Analyses of Experiments in the projection spot welding. The main objective was to identify the influence of some factors of this process in the welding quality. Among many factors involved in the process as a line pressure, weld time, power and retention time were evaluated. As a parameter for the weld quality evaluation, the torque resistance test, interference of spatters, deformation of the nut and consume of electric current were analyzed. To the torque resistance, the factors power and weld time was the most important. The increase on its level resulted in a increase of the response values. The factor stand off was identified as a second factor more important. the interference of spatters and deformation of the nut was influenced by this factors, but the interference of spatters increase wen the line pressure increases too. The factor retention time showed a lower influence in the process.