Influences of line and contact impedance of the efficiency by non-conventional processes

Influences of line and contact impedance of the efficiency by non-conventional processes

HERZIG Mathias, SCHULZE Hans-Peter, KRÖNING Oliver

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Abstract. The basis for an efficient application of the non-conventional processing methods Electric Discharge Machining (EDM), Electrochemical Machining (ECM), or a hybrid ED-EC-processes are the right and stable operating points. Correct matching between source, line and process is necessary for that. In general, the conductivity of transition points can shift the operating point. Especially for pulsed processing ECM and hybrid, the frequency response of the supply configuration is essential. The supply impedance depends on the working frequency, the electrical conductivity, and the capacity of the working medium used. The following examination should analyze which influences, in particular, have the supply lines and the contacts on the process. Using an experimental test setup, the contacts under various forces, frequencies, materials and surface scratches. Fundamentals of contact impedance measurements, surface film, and roughness are discussed, as well as the influence of impedance on an operating point. Especially for ECM, the intention to strike a particular operating point must consider the used medium’s nonlinear characteristic line. The results are significant in building experimental testing facilities and changing industrial systems for special inserts. By analyzing the impedances, particularly the process energy source used, to avoid misinterpretations regarding process control.

Impedance, EDM, ECM, Hybrid Processes

Published online 4/24/2024, 9 pages
Copyright © 2024 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA

Citation: HERZIG Mathias, SCHULZE Hans-Peter, KRÖNING Oliver, Influences of line and contact impedance of the efficiency by non-conventional processes, Materials Research Proceedings, Vol. 41, pp 2437-2445, 2024


The article was published as article 268 of the book Material Forming

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