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Automated system for the measurement of spark current and electric voltage in wire EDM performance

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Abstract

Within important wire electrical discharge machining (WEDM) performance parameters, the discharge energy is a key factor influencing the workpiece material removal rate and surface integrity characteristics. Thus, the monitoring of electric voltage and discharge current waveforms in real situations of WED-Machining is a suitable method to the evaluation and control of process behavior. In this paper, an automated test system especially designed to acquire electric voltage and current data is presented. It consists of a computer-based instrumentation system interfaced to a high performance hardware, a LabVIEW™ software application and a special apparatus for in situ current measurement. It executes signal-processing tasks and presents relevant information, such as total energy transfer and average discharge duration. It is concluded that the automated test system enabled the execution of WEDM experiments with a nearly human-free intervention procedure, through which an evaluation of the process performance in different discharge durations was carried out.

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Correspondence to Fred L. Amorim.

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Technical Editor: Alexandre Mendes Abrao.

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Mendes, L.A., Amorim, F.L. & Weingaertner, W.L. Automated system for the measurement of spark current and electric voltage in wire EDM performance. J Braz. Soc. Mech. Sci. Eng. 37, 123–131 (2015). https://doi.org/10.1007/s40430-014-0171-x

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  • DOI: https://doi.org/10.1007/s40430-014-0171-x

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