Electrical discharge machining assemblies and methods for using the same

ELECTRICAL DISCHARGE MACHINING ASSEMBLIES AND METHODS FORUSING THE SAMEABSTRACT OF THE DISCLOSUREEDM assemblies (100) mount on a machining surface (1) and discharge rotating subelectrodes (201) against the surface (1). The sub-electrodes (201) can also revolve about another shared axis while dischar...

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Bibliographische Detailangaben
Hauptverfasser:	SUMNER, Mark D, WELSH, Christopher M, MATSUMOTO, Jack T
Format:	Patent
Sprache:	eng
Schlagworte:	MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR PERFORMING OPERATIONS SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL TRANSPORTING WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OFELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKESTHE PLACE OF A TOOL
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Zusammenfassung:	ELECTRICAL DISCHARGE MACHINING ASSEMBLIES AND METHODS FORUSING THE SAMEABSTRACT OF THE DISCLOSUREEDM assemblies (100) mount on a machining surface (1) and discharge rotating subelectrodes (201) against the surface (1). The sub-electrodes (201) can also revolve about another shared axis while discharging. Rotation and revolution may be achieved with planetary gears (205) fixed with the sub-electrodes (201) and meshing with a stationary sun gear (204). Several sub-electrodes (201) can be used in a single assembly (100).Downward movement of the sub-electrodes (201) from a central shaft on the mount allows several inches of the surface to be machined. Assemblies (100) are usable in a nuclear reactor during a maintenance period to machine a hole for a replacement manway cover underwater in the flooded reactor. The differing rotational movements and vertical movement can be independently controlled with separate motors (160, 170) in the assembly. Power and controls may be provided remotely through an underwater connection.