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Process Fingerprint in Micro-EDM Drilling

Department of Mechanical Engineering, KU Leuven, Member Flanders Make, 3001 Leuven, Belgium
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Micromachines 2019, 10(4), 240; https://doi.org/10.3390/mi10040240
Received: 7 March 2019 / Revised: 28 March 2019 / Accepted: 8 April 2019 / Published: 11 April 2019
(This article belongs to the Special Issue Product/Process Fingerprint in Micro Manufacturing)
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Abstract

The micro electrical discharge machining (micro-EDM) process is extensively used in aerospace, automotive, and biomedical industries for drilling small holes in difficult-to-machine materials. However, due to the complexity of the electrical discharge phenomena, optimization of the processing parameters and quality control are time-consuming operations. In order to shorten these operations, this study investigates the applicability of a process fingerprint approach in micro-EDM drilling. This approach is based on the monitoring of a few selected physical quantities, which can be controlled in-line to maximize the drilling speed and meet the manufacturing tolerance. A Design of Experiments (DoE) is used to investigate the sensitivity of four selected physical quantities to variations in the processing parameters. Pearson’s correlation is used to evaluate the correlation of these quantities to some main performance and hole quality characteristics. Based on the experimental results, the potential of the process fingerprint approach in micro-EDM drilling is discussed. The results of this research provide a foundation for future in-line process optimization and quality control techniques based on machine learning. View Full-Text
Keywords: electrical discharge machining; micro drilling; process monitoring; quality control electrical discharge machining; micro drilling; process monitoring; quality control
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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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Bellotti, M.; Qian, J.; Reynaerts, D. Process Fingerprint in Micro-EDM Drilling. Micromachines 2019, 10, 240.

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