Breakout detection in fast hole electrical discharge machining |
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| Authors: | P. Koshy M. Boroumand Y. Ziada |
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| Affiliation: | 1. School of Mechanical Engineering, Shanghai Jiao Tong University, No. 800, Dongchuan Rd., Shanghai, 200240, P.R.China;2. School of Mechanical Engineering, Purdue University, West Lafayette, Indiana 47906, USA;3. Department of Mechanical Engineering, KU Leuven, Celestijnenlaan 300, Leuven, BE-3001, Belgium;1. Graduate School of Natural Science & Technology, Okayama University, Okayama 7008530, Japan;2. EDM R&D Division, Makino Milling Machine Co., Ltd., Aiko-gun 2430303, Japan;1. Department of Mechanical Engineering, Technical University of Denmark, Kgs. Lyngby, Denmark;2. Department of Industrial Engineering, University of Padova, Padova, Italy;3. Faculty of Mechanical Engineering, University of Ljubljana, Ljubljana, Slovenia;1. Faculty of Mechanical Engineering, Institute of Science and Engineering, Kanazawa University, Japan;2. Division of Mechanical Science and Engineering, Graduate School of Natural Science & Technology, Kanazawa University, Japan;3. Department of Mechanical Science and Engineering, Graduate School of Engineering, Nagoya University, Japan;1. School of Mechanical Engineering, Shanghai Jiao Tong University;2. School of Mechanical Engineering, Purdue University |
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| Abstract: | Real time tracking of the working end of the tool in fast hole electrical discharge drilling process is not straightforward due to extensive relative erosion of the tool, which manifests as severe longitudinal and shape wear. This poses a problem in terms of sensing hole breakout as well as hole completion, with adverse implications on process productivity and component quality. To this end, this paper presents a scheme that concurrently monitors the back pressure of the dielectric fluid injected through the tool and the displacement of the machine tool ram, to detect hole breakout and completion, respectively. Implementation of such a system has the scope for significantly enhancing process output, particularly in applications that entail the drilling of a large number of holes. |
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