Eventos Anais de eventos
COBEM 2023
27th International Congress of Mechanical Engineering
Study of Acoustic Emissions in Electrical Discharge Machining with Copper and Graphite Electrodes
Submission Author:
Samuel Ferreira , MG , Brazil
Co-Authors:
Samuel Ferreira, Luis Henrique Andrade Maia, Mariana de Paula Souza, Leonel Abreu Dimas, fred lacerda amorim
Presenter: Mariana de Paula Souza
doi://10.26678/ABCM.COBEM2023.COB2023-0480
Abstract
Electrical discharge machining (EDM) is an unconventional machining process that involves the removal of material from a workpiece through successive electrical discharges submerged in a dielectric fluid. The phenomena associated with EDM are continually being studied to understand its behavior and its relationships with machine parameters, dielectrics, and the materials used in the process. Unlike conventional machining methods, EDM operates with the tool electrode in close proximity to the workpiece but without physical contact, enabling material removal. Material is removed from the part through electroerosion, which overheats the material on the surface of the work gap. This study aims to investigate the behavior of EDM phenomena in the machining of AISI H13 steel, considering variations in machining parameters, electrolytic copper, and graphite electrodes. The experimental characterization employs Acoustic Emission (AE) signals resulting from the process, along with Machine Learning (ML) tools for data analysis. The results demonstrate a satisfactory accuracy of 97.7%, highlighting the superior control of machining phenomena when using graphite electrodes compared to electrolytic copper electrodes. These results are achieved by detecting the excited frequencies and amplitudes of AE signals from EDM tests using Fast Fourier Transform (FFT) for data processing.
Keywords
eletrical discharge machining, Acoustic emissions
