NASA NTRS · 19870000505
Contamination-Free Electrical-Discharge Machining
Abstract
Contamination of parts by electrical-discharge machining (EDM) almost completely eliminated by reversing flow of coolant. Flow reversed from usual direction so coolant carries contaminants out through passage in electrode. Coolant for reverse flow is pressurized dichlorodifluoromethane vapor.
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Schmidt, Mark G.. 1987-10-01. Contamination-Free Electrical-Discharge Machining. https://ntrs.nasa.gov/citations/19870000505
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