Abstract
Electrochemical Arc Machining (ECAM) attains high metal removal rates by combining the mechanisms of electrochemical dissolution (ECD) and electrodischarge erosion (EDE). ECD and EDE occur as discrete phases of randomly-varying intensity and duration. Metal removal in the leading and side-gaps of ECAM drilling is discussed. The random occurrence of spikes in both working voltage and machining power that arise during the ECD and EDE phases is described in terms of stochastic difference equations which are obtained from the Dynamic Data Systems (DDS) modelling method. The spectral moments of the voltage and power profiles developed from these models are used to discriminate between the phases of ECD, and the occurrence arcs and aparks in the machining gap. ECAM-drilling is used to illustrate how the influences on the type, intensity and duration of the machining phases can be studied. The analysis of the machining power is shown to be useful only for qualitative assessments.
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References
J.A. McGeough, A.B. Khayry and W. Munro (1983) Theoretical and Experimental Investigation of the Relative Effects of Spark Erosion and Electrochemical Dissolution in Electorchemical Arc Machining, Annals of the CIRP V32/1, p.113,
G.Box and G. Jenkins (1976) Time Series Analysis — Forecasting and Control, Revised Edition, Holden-Day, San Francisco.
S. Pandit and S. Wu (1983) Time Series and System Analysis with Applications, John Wiley, New York.
S. Wu (1977) Dynamic Data System — A New Modelling Approach, Trans. ASME, Jour. of Eng. for Industry, Aug., P. 708
D.W. Rudorff (1957) Principles and Applications of Spark Machining, Proc. I. Mech. Eng. Feb., P.495.
M. Kubota, Y. Tamura, H. Takahashi and T. Sugaya (1980) Basic Study of ECDM — II, Japan Assoc. of Electro-Machinery, V 26, P.42
A.B. Khayry (1984) Stochastic and Experimental Studies of Drilling by Electrochemical Arc Machining, PhD Thesis University of Aberdeen, U.K.
P.R. Nayak (1971) Random Process Model of Rough Surfaces, Trans. ASME, Journ. of Lubr. Tech. V 93F(3), P.348
H. Cramer and M. Leadbetter (1967), Stationary and Related Stochastic Processes, John Wiley, N.Y.
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© 1985 Department of Mechanical Engineering University of Birmingham
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Khayry, A.B.M., McGeough, J.A. (1985). Modelling of Electrochemical arc Machining by Use of Dynamic Data Systems. In: Tobias, S.A. (eds) Proceedings of the Twenty-Fifth International Machine Tool Design and Research Conference. Palgrave, London. https://doi.org/10.1007/978-1-349-07529-4_37
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DOI: https://doi.org/10.1007/978-1-349-07529-4_37
Publisher Name: Palgrave, London
Print ISBN: 978-1-349-07531-7
Online ISBN: 978-1-349-07529-4
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