COMBINED METHOD FOR DRILLING A LAYER SYSTEM, IN WHICH MECHANICAL WORKING AND EDM WORKING ARE PERFORMED
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United States of America Patent
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Issued Date -
Apr 10, 2014
app pub date -
Sep 25, 2013
filing date -
Oct 8, 2012
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Abandoned
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Abstract
A method including mechanical removal and electrical discharge machining (EDM) working allowing symmetrical or asymmetrical holes to be produced with exact contours in a layer system including a metallic substrate and a non-metallic outermost layer is provided. In a first step, an outer region of the hole is worked by mechanical removal. In a final method step, when the underlying substrate or a metallic adhesion promoting layer has been reached an electrical discharge machining tool is used.
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