Process Electrical-discharge machining (EDM)
EDM is used to machine very hard materials as used in e.g. tools and dies.

EDM can only be used on electrical conducting materials like metal. Sparks causes localized temperatures that melt the material and the waste material is then transported away with a dielectric fluid.

EDM tools are often made from graphite.
Danish Name Gnistbearbejdning
Category Reducing processes, Cutting
Materials Metals
Price notes Machining times are very long (hours to days).
Environmen- tal notes Tool and dies
Square hole
Photo Thomas Nissen (Computer graphics)
Copyright © 1996-2006 Torben Lenau
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