Alstom Technology Limited

Abb Research Ltd.

Ansaldo Energia IP UK Limited

General Electric Technology Gmbh

Ansaldo Energia Switzerland Ag

Ivan Luketic

Shailendra Naik

Brian Kenneth Wardle

Klaus Semmler

Marcel Koenig

G&uuml;nter Wilfert

Ralf Walz

Michael Bl&ouml;chlinger

Laura Bogdanic

Ioannis Paralikas

A method for manufacturing a contoured hole, the hole being manufactured in a wall, the wall comprising a first, a second surface, and a wall thickness between the wall first and second surface. The comprises manufacturing a first non-penetrating hole extending from the first surface and into the wall, wherein a distal end of the first hole is located within the wall such that the first hole does not penetrate the wall second surface, and manufacturing a through hole, wherein the through hole is fluidly connected with first hole and penetrates the wall second surface.

Method for producing contoured holes

The invention relates to a method for the parametric production of a drilled hole in a component, in particular for the parametric production of a drilled cooling hole in a blade of a gas or steam turbine. In the case of the method according to the invention, in a first method step () an actual wall thickness of the component is measured at the location at which the drilled hole is to be introduced. Subsequently, at least one parametric drilled-hole geometry value is determined on the basis of an adjustment of the measured, actual wall thickness with an assumed, ideal wall thickness (method step). The drilled hole is then produced according to the determined parametric drilled-hole geometry value (method step). Furthermore, the invention relates to a drilling device, in particular for carrying out the method, and to a component into which one or more drilled holes have been introduced according to the method.

Parametric production of drilled cooling holes

In a method of forming a cooling bore in a wall of a workpiece, the configuration of a feed section and a diffuser section is selected, a throughbore is produced with a cross-sectional area within the cross-sectional area of the feed section, and the diffuser section is cut out by a beam- or jet-drilling method in such a way that the drilling beam or jet in the region of the feed section remains essentially within the cross-sectional area of the latter.

Method of producing a noncircular cooling bore

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Untersiggenthal, Switzerland

Ivan Luketic