Method and apparatus for separating a canister and component

Patent metadata

Field	Value
Publication number	US-10035189-B2
Application number	US-201414476291-A
Country	US
Kind code	B2
Filing date	Sep 3, 2014
Priority date	Sep 5, 2013
Publication date	Jul 31, 2018
Grant date	Jul 31, 2018

Abstract

A method and apparatus for removing a canister 12 from a component 18 by forming an opening 30 in the canister wall thickness 14, 16 and introducing a pressurised fluid into the opening 14, 16 causing hydrostatic pressure build up between an internal canister surface 14 and the component 18 , leading to the removal of the canister 12 . This method and apparatus obviates the need to expend significant machining or chemical processing to remove the canister 12.

First claim

The invention claimed is:

1. A method of separating a hipping (Hot Isostatic Pressing) canister from a HIPped component, the method comprising steps of:
providing the hipping canister with a metallic canister wall having a first surface and an opposite second surface, wherein an aperture opens to the first surface and contains a blocking member, the second surface having an attachment feature arranged to attach a fluid supply conduit to the attachment feature;
removing the blocking member to create an opening extending through a wall of the hipping canister; and
separating the first surface from the HIPped component by supplying a fluid under pressure through the opening.

2. The method according to claim 1 , wherein the canister wall has a thickened region in the region of the opening, the method comprising removing a portion of the thickened region to uncover the blocking member, the blocking member comprised of a blocking material.

3. The method according to claim 2 , wherein the portion of the thickened region is removed by drilling or grinding.

4. The method according to claim 2 , wherein the blocking member is removed by applying a solution to the blocking material that dissolves the blocking material.

5. The method according to claim 2 , wherein the thickened region has the attachment feature for the fluid supply conduit,
wherein the method comprises the step of attaching the fluid supply conduit to the attachment feature.

6. The method according to claim 5 , wherein the step of attaching the fluid supply conduit comprises one or more of the following:
screwing the conduit onto a screw thread formed on an external surface of the attachment feature,
screwing the conduit onto a screw thread formed on an internal surface of the attachment feature, and
clipping or welding the conduit to the attachment feature.

7. A canister for a hot isostatic press (HIP) process comprising a metallic canister wall having a first surface and an opposite second surface, wherein:
an aperture opens to the first surface and contains a blocking member, and
the second surface has an attachment member arranged to attach a fluid supply conduit to the attachment member such that fluid can be supplied through the aperture when the blocking member is removed from the aperture.

8. The canister according to claim 7 , wherein the attachment member comprises a thickened region extending from the second surface.

9. The canister according to claim 8 , wherein the aperture extends from the first surface into the attachment member and the blocking member extends into the attachment member.

10. The canister according to claim 7 , wherein a diffusion bonding resistant layer is deposited on the first canister surface.

11. The canister according to claim 7 , wherein the blocking member is formed from a dissolvable material.

12. The canister according to claim 7 , wherein the blocking member is secured into the aperture of the canister wall by a mechanism that includes one or more of the following: a screw threaded region formed around the external surface of the blocking member, which is mateably received with a corresponding internal screw threaded region formed on the internal surface of the aperture, an interlocking mechanism, an adhesive bonding agent, or by interference fit between the blocking member and the aperture in the canister wall.

13. The canister according to claim 7 , wherein the attachment member has a screw threaded region formed on an external attachment member surface for engaging a complementary screw threaded region on an inner bore of a fluid supply conduit.

14. The canister according to claim 7 , wherein the attachment member is welded to the second surface of the canister wall.

Assignees

• Rolls Royce Plc

Inventors

• Boswell John Harold
• Clark Daniel

Classifications

• B22F2003/153

  apparatus specific to HIP · CPC title

• B22F3/1283 Primary

  Container formed as an undeformable model eliminated after consolidation · CPC title

• B22F3/15 Primary

  Hot isostatic pressing · CPC title

• B22F3/1241

  layered · CPC title

• B22F3/1291 Primary

  Solid insert eliminated after consolidation · CPC title