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High speed cutting of graphite electrodes

: Markworth, L.; Bilsing, A.

Dimitrov, D. ; Univ. of Stellenbosch, Global Competitiveness Centre in Engineering:
COMA 2001, International Conference on Competitive Manufacturing. Proceedings : 31 January - 2 February 2001, Stellenbosch, South Africa
Stellenbosch, SA, 2001
ISBN: 0-7972-0828-3
International Conference on Competitive Manufacturing (COMA) <2001, Stellenbosch, South Africa>
Conference Paper
Fraunhofer IPT ()
manufacturing; high speed cutting; machining of graphite; graphite milling strategy; machining process design

Increasingly, graphite is being used as an electrode material for EDM machining applications. The obvious advantages to be gained in the manufacture of filigree geometries and the high rates of material removal, must be balanced against the lack of experience in machining graphite in practice. Due to its material characteristics, the material behaviour of graphite is brittle, which means that it is difficult, if not impossible, to transfer experience acquired in steel machining to graphite machining. The following article describes the special features of the cutting mechanisms at work in graphite machining operations and give rommendations regarding machining strategies and parameters which, if applied, help to avoid disappointment when machining graphite.