System and method of post-cure processing of composite core

Patent metadata

Field	Value
Publication number	US-9925680-B2
Application number	US-201313914737-A
Country	US
Kind code	B2
Filing date	Jun 11, 2013
Priority date	Jun 11, 2013
Publication date	Mar 27, 2018
Grant date	Mar 27, 2018

Abstract

A method of cutting a wafer of composite core from a bulk composite core includes stabilizing the bulk composite core with a fixture, the bulk composite core having a plurality of tube members. The method also includes cutting through each of the tube members to create the wafer while the bulk composite core is stabilized by the fixture.

First claim

The invention claimed is:

1. A method of cutting a wafer of composite core from a bulk composite core, the method comprising the steps of:
providing a bulk composite core having a substantially hexagonal outer geometry and a plurality of tube members, each of the tube members comprises a plurality of reinforcement fibers disposed in a polymeric matrix;
stabilizing the bulk composite core with a fixture having a hexagonal inner surface that lies adjacent to the hexagonal outer geometry of the bulk composite core;
positioning the bulk composite core within the fixture so as to partially expose a desired amount of the bulk composite core for cutting; and
cutting through each of the tube members in the bulk composite core to create a wafer having a substantially hexagonal outer geometry.

2. The method according to claim 1 , wherein each tube member has a hexagonal shaped geometry.

3. The method according to claim 1 , wherein the step of cutting through each of the tube members in the bulk composite core includes cutting through an unsupported portion of the bulk composite core adjacently to a portion of the bulk composite core supported by the fixture.

4. The method according to claim 1 , wherein the step of cutting through each of the tube members in the bulk composite core comprises cutting along a plane that is parallel to an exposed surface network of the bulk composite core.

5. The method according to claim 1 , wherein the positioning and cutting steps are repeated to create additional wafers having a substantial hexagonal outer geometry.

6. The method according to claim 1 , wherein the reinforcement fibers comprise at least one or more of the following: carbon, graphite, glass, an aromatic polyamide material, and a variant of an aromatic polyamide material.

7. The method according to claim 1 , wherein the polymeric matrix comprises a resin.

8. The method according to claim 7 , wherein the resin is a thermoplastic resin or a thermosetting resin.

9. The method according to claim 1 , wherein the plurality of reinforcement fibers are oriented in one or more directions.

Assignees

• Bell Helicopter Textron Inc

Inventors

• Kendrick Phillip A
• Armstrong Levi H

Classifications

• Y10T83/0405

  With preparatory or simultaneous ancillary treatment of work · CPC title

• Y10T83/04

  Processes · CPC title

• Y10T156/1357

  Slitting and severing · CPC title

• B29C70/545

  Perforating, cutting or machining during or after moulding · CPC title

• Y10T156/13

  Severing followed by associating with part from same source · CPC title