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MANUFACTURING METHODS FOR MULTI-LOBED COOLING HOLES

  • US 20130206739A1
  • Filed: 07/09/2012
  • Published: 08/15/2013
  • Est. Priority Date: 02/15/2012
  • Status: Active Grant
First Claim
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1. A method for producing a diffusion cooling hole extending between a wall having a first wall surface and a second wall surface, the method comprising:

  • forming a cooling hole inlet at the first wall surface;

    forming a cooling hole outlet at the second wall surface;

    forming a metering section downstream from the inlet; and

    forming a multi-lobed diffusing section between the metering section and the outlet,wherein the inlet, outlet, metering section and multi-lobed diffusing section are formed by a technique selected from the group consisting of laser drilling, particle beam machining, fluid jet guided laser machining, mechanical machining, masking and combinations thereof.

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