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US 2014/0097157 A1Published application
Combined method for drilling a layer system, in which mechanical working and edm working are performed
OwnerHans-Thomas Bolmsinventor
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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.
Claims9
A method for producing a hole in a layer system, comprising:
- providing the layer system with a metallic substrate and an outermost layer, wherein the outermost layer is electrically non-conductive, so that the outermost layer cannot be worked by means of an electrical discharge machining (EDM) method;
- working an outer region of the hole by mechanical removal wherein material is removed from the layer in the outer region by a diamond;
- and
- using an electrical discharge (EDM) electrode or electronic tool when the underlying substrate or an a metallic adhesion promoting layer has been reached in order to create a remaining part of the hole.
1 more element
Dependencies are inferred from the claim text.