Micro Electrical Discharge Machining of Tungsten Carbide with Ultra-Short Pulse

Kröning, Oliver; Herzig, Mathias; Hackert-Oschätzchen, Matthias; Kühn, Ralf; Zeidler, Henning; Schubert, Andreas

doi:10.4028/www.scientific.net/KEM.651-653.759

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HomeKey Engineering MaterialsKey Engineering Materials Vols. 651-653Micro Electrical Discharge Machining of Tungsten...

Micro Electrical Discharge Machining of Tungsten Carbide with Ultra-Short Pulse

Abstract:

Micro EDM (Electrical Discharge Machining) is a known nonconventional process for the machining of hard to cut materials. Due to its ablating nature based on melting and evaporation through heat induced by electrical discharges, it can function independently of the hardness, toughness or brittleness of the workpiece. Thus micro EDM is a possible process to fulfill the requirements of higher precision and high quality in carbide metal machining. Thereby the surface and the roughness of machined carbide metals depend on the discharge energy used. For machining carbide metals with high surface quality pulse generators with ultra-short discharges are required. This paper presents the development of a two-staged pulse generator with the ability to provide ultra-short pulses by using a two-staged pulse. The current and voltage signals of the discharges were recorded and their characteristics were analyzed.

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Periodical:

Key Engineering Materials (Volumes 651-653)

Edited by:

Aldo Ofenheimer, Assoc. Prof. Dr. Cecilia Poletti, Daniela Schalk-Kitting and Christof Sommitsch

Pages:

759-764

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.651-653.759

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Online since:

July 2015

Authors:

Oliver Kröning, Mathias Herzig, Matthias Hackert-Oschätzchen*, Ralf Kühn, Henning Zeidler, Andreas Schubert

Keywords:

Electric Discharge Machining, Hard Metal, Micro Electric Discharge Machining, Needle Pulse Source, Process Energy Source, Ultra-Short Discharge

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* - Corresponding Author

References

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