Method of producing diffusion holes in turbine components by a m

Details Method of producing diffusion holes in turbine components by a m Method of producing diffusion holes in turbine components by a m

1993-12-21

1997-02-25

Evans, Geoffrey S.

Electric heating

Metal heating

Cutting or disintegrating

219 6915, B23H 100, B23H 914

Patent

active

056056397

ABSTRACT:
A method of forming diffusion holes in a super alloy article by electrical discharge machining by the steps of (a) inserting onto an electrical discharge machine a multiple piece electrode with at least one tooth with respectively at least one movable elongated rod wherein each rod is positioned through each tooth and secured to the tooth, and (b) advancing the multiple piece electrode during electrical discharge machining longitudinally into the super alloy article so that the rod forms a hole with a metering section in the super alloy article of about 0.010 inches in diameter at a depth in excess of about 0.250 inches and the tooth forms a diffused area, with an angle of about 10 degrees, at one end of the hole.

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