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US 10,870,159 B2Granted
Electrical discharge machining system including in-situ tool electrode
AssigneeHamilton Sunstrand Corporation
InventorsMark R. Jaworowski, Eric W. Karlen, Gary M. Lomasney, Sergey Mironets
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Abstract
An additive manufactured workpiece includes one or more cavities having an inner surface. A dielectric interface is formed in the cavity, and conforms to the inner surface. The additive manufactured workpiece further includes an in-situ electrode in the cavities. The dielectric interface is interposed between the in-situ electrode and the inner surface of the workpiece.
Claims13
A method of improving an internal surface topography of a manufactured workpiece, the method comprising:
- forming a dielectric interface in at least one cavity of the workpiece;
- depositing graphite particles to form an in-situ electrode that is in-situ with the at least one cavity such that the dielectric interface is between the in-situ electrode located in the at least one cavity of the workpiece and a rough inner surface of the at least one cavity;
- flowing an electrical current through the in-situ electrode;
- inducing an electrical discharge across the dielectric interface;
- and
- removing irregularities from the rough surface via the electrical discharge across the dielectric interface so as to convert the rough surface into a smoothened inner surface having a reduced number of irregularities.
3 more elements
Dependencies are inferred from the claim text.