Method of forming a cooling hole by laser drilling

Patent metadata

Field	Value
Publication number	US-9696035-B2
Application number	US-201313875150-A
Country	US
Kind code	B2
Filing date	May 1, 2013
Priority date	Oct 29, 2010
Publication date	Jul 4, 2017
Grant date	Jul 4, 2017

Abstract

A method for making shaped cooling holes in a substrate by pulsing and stopping a laser while moving the laser or substrate. The method produces shaped cooling holes with a bore angled relative to an exit surface of the combustor liner. One end of the bore is an inlet formed in an inlet surface of the combustor liner. The other end of the bore is an outlet formed in the exit surface of the combustor liner. The outlet has a shaped portion that expands in only one dimension.

First claim

What is claimed is:

1. A method of forming a cooling aperture, comprises:
drilling a center bore at a preselected angle from an exit surface toward an inlet surface through a substrate;
pulsing a laser, a first series while moving one of said laser and said substrate in a first direction relative to a center line of said bore;
stopping said pulsing said laser said first series and moving said one of said laser and said substrate;
pulsing said laser and second series while mo…

Assignees

• Gen Electric

Inventors

• Starkweather John Howard
• Bennett William
• Gibbons John
• Urbanski Anthony

Classifications

• B23K26/389

  Operations & Transport · mapped topic

• F23R2900/03041

  Mechanical Engineering · mapped topic

• B23K26/0622

  Operations & Transport · mapped topic

• F23R3/002 Primary

  Mechanical Engineering · mapped topic

• B23K26/388

  Operations & Transport · mapped topic