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Manufacturing Methods - EDM
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Process of EDM
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Definition
No Potential for Subclass Carryover
EDM (Electrical Discharge Machining) – Metal removed by a rapid spark discharge between different polarity electrodes, one on the work piece and the other the tool separated by a gap distance of 0.013 to 0.9 mm (0.0005 to 0.035 in.). The gap is filled with dielectric fluid and metal particles that are melted, in part vaporized, and expelled from the gap.
Subclass carryover would not be expected on a work piece machined using EDM. This is due to the random nature of the spark gap interaction with the work piece. The surface of the work piece may have a pitted, granular like appearance when viewed under magnification.