Method of sizing a cavity in a part

Patent metadata

Field	Value
Publication number	US-10822988-B2
Application number	US-201514976416-A
Country	US
Kind code	B2
Filing date	Dec 21, 2015
Priority date	Dec 21, 2015
Publication date	Nov 3, 2020
Grant date	Nov 3, 2020

Abstract

A method of sizing a cavity in a part and a part made from such method. The method includes forming the part having the cavity, including forming a plurality of protrusions extending within the cavity from at least one internal surface of the cavity, the protrusions having distal ends bordering an unobstructed portion of the cavity, the unobstructed portion having an initial dimension at least partially defined by a position of the distal ends, pressing a deforming element against the distal ends of the protrusions to plastically deform the protrusions toward the at least one internal surface of the cavity and increase the initial dimension to a final dimension, and disengaging the deforming element from the distal ends.

First claim

The invention claimed is:

1. A shroud segment assembly for a gas turbine engine, comprising:
adjacent shroud segments defining a seal cavity therebetween, each shroud segment having a body with a plurality of deformable protrusions extending from at least one internal surface of the body, the deformable protrusions having distal ends bordering an unobstructed portion of the seal cavity, the unobstructed portion defining an initial dimension of the seal cavity at least partially defined by a position of the distal ends, the deformable protrusions being plastically deformable toward the at least one internal surface to increase the initial dimension to a final dimension of the seal cavity; and
a seal removably receivable within the seal cavity after deformation of the protrusions, the seal having a dimension defined along a direction corresponding to the initial and final dimensions, the dimension of the seal being larger than the initial dimension and smaller than the final dimension.

2. The shroud segment assembly as defined in claim 1 , wherein the cavity is formed as a slot in a surface of each shroud segment, the at least one surface being a bottom surface of the slot, the initial dimension being an initial depth of the slot as measured from the surface of the shroud segment to the distal ends.

3. The shroud segment assembly as defined in claim 1 , wherein a central axis of the cavity is curved.

4. The shroud segment assembly as defined in claim 1 , wherein the cavity extends through each shroud segment and the at least one internal surface is a circumferential surface, the protrusions being formed to extend radially from the circumferential surface, the initial dimension being an initial diameter defined between the distal ends of opposing ones of the protrusions.

5. The shroud segment assembly as defined in claim 3 , wherein the protrusions are regularly spaced apart around the circumferential surface of the cavity.

6. The shroud segment assembly as defined in claim 1 , wherein the protrusions are spaced apart along a length of the at least one internal surface.

Assignees

• Pratt & Whitney Canada

Inventors

• Campomanes Marc Lorenzo
• Scalzo Orlando
• Fagnan Mathieu

Classifications

• F01D11/127 Primary

  with a deformable or crushable structure, e.g. honeycomb · CPC title

• B23P9/025 Primary

  to inner walls of holes by using axially moving tools · CPC title

• B22F10/28

  Powder bed fusion, e.g. selective laser melting [SLM] or electron beam melting [EBM] · CPC title

• B24B39/02

  designed for working internal surfaces of revolution · CPC title

• F16B21/20

  for bolts or shafts without holes, grooves, or notches for locking members {(by rings resilient in their plane F16B21/18)} · CPC title