Composite part compaction device

Patent metadata

Field	Value
Publication number	US-11220071-B2
Application number	US-201816176257-A
Country	US
Kind code	B2
Filing date	Oct 31, 2018
Priority date	Oct 31, 2018
Publication date	Jan 11, 2022
Grant date	Jan 11, 2022

Abstract

Systems and methods are provided for compacting laminates. One embodiment is a method for compacting a laminate onto a surface of a forming tool. The method includes placing the laminate onto the forming tool, disposing a compaction device over the laminate, gripping the compaction device to the forming tool, compacting the laminate with a pressure foot of the compaction device, and removing the compaction device from the forming tool.

First claim

What is claimed is:

1. A method for compacting a laminate onto a surface of a forming tool, the method comprising:
placing the laminate onto the forming tool;
aligning a pressure foot of a compaction device over the laminate, wherein the compaction device is distinct from the forming tool;
rotating electromagnets of the compaction device into alignment with a surface of the forming tool;
gripping the compaction device directly to the surface of the forming tool prior to initiating compaction of the laminate, by activating the electromagnets;
compacting the laminate with the pressure foot of the compaction device while the electromagnets remain activated, wherein the pressure foot is operated independently of the electromagnets; and
removing the compaction device from the forming tool.

2. The method of claim 1 further comprising:
activating the electromagnets via a switch.

3. The method of claim 2 wherein:
the forming tool is magnetic; and
gripping the compaction device to the forming tool comprises activating the electromagnets within the compaction device to draw the compaction device into contact with the forming tool.

4. The method of claim 2 wherein:
the compaction device is magnetic; and
gripping the compaction device to the forming tool further comprises activating electromagnets within the forming tool that draw the compaction device into contact with the forming tool.

5. The method of claim 1 wherein:
the pressure foot is driven in response to pneumatic pressure applied to the compaction device, and completely covers the laminate.

6. The method of claim 1 wherein:
driving the pressure foot comprises actuating a ram at the compaction device that is mechanically coupled with the pressure foot.

7. The method of claim 6 wherein:
actuating the ram compresses shock absorbers that are mechanically coupled with the pressure foot and that distribute load across the pressure foot.

8. The method of claim 7 further comprising:
adjusting an angle of a plate that is interposed between the shock absorbers and the ram, as the pressure foot is driven.

9. The method of claim 1 wherein:
compacting the laminate comprises driving the pressure foot, and the pressure foot is made of a flexible material.

10. A portion of an aircraft assembled according to the method of claim 1 .

11. A non-transitory computer readable medium embodying programmed instructions which, when executed by a processor, are operable for performing a method for compacting a laminate onto a surface of a forming tool, the method comprising:
placing the laminate onto the forming tool;
aligning a pressure foot of a compaction device over the laminate, wherein the compaction device is distinct from the forming tool;
rotating electromagnets of the compaction device into alignment with a surface of the forming tool;
gripping the compaction device directly to the surface of the forming tool prior to initiating compaction of the laminate, by activating the electromagnets;
compacting the laminate with the pressure foot of the compaction device while the electromagnets remain activated, wherein the pressure foot is operated independently of the electromagnets; and
removing the compaction device from the forming tool.

12. A portion of an aircraft assembled according to the method defined by the instructions stored on the computer readable medium of claim 11 .

13. A method for laying up a composite preform, the method comprising:
placing a laminate comprising at least one ply of fiber reinforced material onto a surface of a forming tool;
aligning a pressure foot of a compaction device over the laminate, wherein the compaction device is distinct from the forming tool;
rotating electromagnets of the compaction device into alignment with a surface of the forming tool;
applying gripping forces directly between the compaction device and the forming tool prior to initiating compaction of the laminate, by activating the electromagnets;
compacting the laminate to the forming tool by controllably applying compaction forces to the laminate via the pressure foot while maintaining the gripping forces via the electromagnets;
laying up at least one ply atop the compacted laminate at the forming tool; and
repeating the steps of compacting and placing.

14. The method of claim 13 wherein:
compacting the laminate is performed while at atmospheric pressure.

15. The method of claim 13 further comprising:
activating the electromagnets via a switch.

16. The method of claim 13 wherein:
the forming tool is magnetic; and
maintaining gripping forces comprises activating the electromagnets within the compaction device to draw the compaction device into contact with the forming tool.

17. The method of claim 13 wherein:
the compaction device is magnetic; and
maintaining gripping forces further comprises activating electromagnets within the forming tool that draw the compaction device into contact with the forming tool.

18. The method of claim 13 further comprising:
controlling the compaction forces by controlling an amount of force applied by a ram to the pressure foot while the pressure foot contacts the laminate.

19. The method of claim 18 wherein:
the amount of force applied by the ram is controlled to be less than or equal to the gripping forces.

20. The method of claim 18 further comprising:
receiving force applied by the ram at shock absorbers; and
distributing the force across the pressure foot via the shock absorbers.

Assignees

• Boeing Co

Inventors

• Halbritter Allen James
• Duncan Edward Ray

Classifications

• B29C70/345 Primary

  using matched moulds · CPC title

• B29C43/361 Primary

  with pressing members independently movable of the parts for opening or closing the mould, e.g. movable pistons (transfer moulding B29C45/02; injection-compression moulding B29C45/561) · CPC title

• B29C70/30

  Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core · CPC title

• B29C33/30

  Mounting, exchanging or centering {(moulds, mould parts or cores; B29C33/485 takes precedence)} · CPC title

• B29C43/32

  Component parts, details or accessories; Auxiliary operations · CPC title