Method of producing diffusion holes in turbine components by a multiple piece electrode
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United States of America Patent
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Feb 25, 1997
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N/A
app pub date -
Dec 21, 1993
filing date -
Dec 21, 1993
priority date (Note) -
Expired
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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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