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Micromachines 2017, 8(8), 251; doi:10.3390/mi8080251

Cost Index Model for the Process Performance Optimization of Micro-EDM Drilling on Tungsten Carbide

Department of Management, Information and Production Engineering (DIGIP), University of Bergamo, 24044 Dalmine (BG), Italy
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Received: 26 June 2017 / Revised: 12 July 2017 / Accepted: 10 August 2017 / Published: 17 August 2017
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Abstract

The present work deals with the execution of through micro-holes on tungsten carbide plates using a micro-electrical discharge machining (micro-EDM) machine. The experiments were carried out by varying peak current, voltage and frequency in order to achieve suitable technology windows. Tubular electrodes, made of two different materials (tungsten carbide and brass), were used. The investigation focuses on the influence of variable process parameters on the process performances and their optimization. The performance indicators taken into account were Material Removal Rate (MRR) and Tool Wear Ratio (TWR). A general model based on a cost index was defined for the process performances optimization and the optimal conditions were identified through the minimization of the objective function. View Full-Text
Keywords: micro-electrical discharge machining (micro-EDM); tungsten carbide; micro-drilling; process performance; model micro-electrical discharge machining (micro-EDM); tungsten carbide; micro-drilling; process performance; model
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

D’Urso, G.; Giardini, C.; Quarto, M.; Maccarini, G. Cost Index Model for the Process Performance Optimization of Micro-EDM Drilling on Tungsten Carbide. Micromachines 2017, 8, 251.

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