Systems and methods for cure control of additive manufacturing

Patent metadata

Field	Value
Publication number	US-10843452-B2
Application number	US-201615367021-A
Country	US
Kind code	B2
Filing date	Dec 1, 2016
Priority date	Dec 1, 2016
Publication date	Nov 24, 2020
Grant date	Nov 24, 2020

Abstract

Systems for cure control of additive manufacturing comprise a build volume, a curing energy source, and a controller. The curing energy source is configured to actively deliver curing energy to discrete sections of a part as it is being additively manufactured. The controller is programmed to direct delivery of curing energy to impart desired cure properties to the discrete sections and/or according to predetermined cure profiles for the discrete sections. Methods of additively manufacturing a part comprise additively building a part from a feedstock material, and actively curing discrete sections of the part as it is being additively built to impart desired cure properties to the part and/or desired cure profiles to the part.

First claim

The invention claimed is:

1. A method of additively manufacturing a part, the method comprising:
additively building the part from a curable feedstock material by delivering the curable feedstock material to a build volume via a nozzle of a deposition system;
actively curing discrete sections of the part as the curable feedstock material is being delivered to the build volume via the nozzle to additively build the part according to predetermined cure profiles for the discrete sections of the part, wherein the actively curing is computer controlled, wherein the actively curing comprises curing a select discrete section of the part less than the rest of the part, such that the select discrete section of the part is configured for subsequent work on the select discrete section; and
subsequent to the actively curing, operatively coupling a distinct component to the select discrete section of the part.

2. The method of claim 1 , wherein the actively curing comprises curing discrete sections of the part to different levels of cure.

3. The method of claim 1 , wherein the actively curing comprises curing a first discrete section to a first level of cure and curing a second discrete section to a second level of cure, wherein the first level of cure is greater than the second level of cure.

4. The method of claim 1 , wherein the actively curing comprises curing a first discrete section according to a first cure profile and curing a second discrete section according to a second cure profile, wherein the second cure profile differs from the first cure profile.

5. The method of claim 1 , further comprising:
subsequent to the actively curing, mechanically working on the select discrete section.

6. The method of claim 1 , wherein the operatively coupling comprises curing together the distinct component and the select discrete section of the part.

7. The method of claim 1 , wherein the method is performed within an environmental enclosure, wherein the environmental enclosure comprises one or more of an autoclave, an oven, a pressure chamber, a vacuum chamber, an inert gas chamber, an environmental bag, tent, or box, and a light exposure chamber.

8. The method claim 1 , wherein the actively curing comprises delivering curing energy by a curing energy source that is configured to be able to deliver the curing energy to any exposed portion of the part as the part is being additively built.

9. The method of claim 1 , wherein the additively building the part comprises additively building the part within a build volume, wherein the actively curing comprises actively moving a curing energy source in three dimensions relative to the build volume.

10. The method of claim 1 , wherein the actively curing comprises directing a laser beam to the discrete sections of the part.

11. The method of claim 1 , wherein the actively curing comprises directing a laser beam to the discrete sections of the part with a mirror-positioning system.

12. The method of claim 1 , wherein the actively curing comprises directing an electron beam to the discrete sections of the part.

13. The method of claim 1 , wherein the actively curing comprises directing an electron beam to the discrete sections of the part with a magnetic steering system.

14. The method of claim 1 , wherein the actively curing comprises directing light from a lamp to the discrete sections of the part with a projector.

15. The method of claim 1 , wherein the actively curing comprises selectively directing light from a lamp to the discrete sections of the part with a shuttering system.

16. The method of claim 8 , wherein the actively curing comprises delivering curing energy to discrete sections of a lower surface of the part via a support bed that supports the part as the part is being additively built.

17. The method of claim 1 , wherein the actively curing comprises actively directing curing energy to discrete sections of a lower surface of the part supported by a support bed by having the support bed actively mask the lower surface.

18. A method of additively manufacturing a part, the method comprising:
additively building the part from a curable feedstock material by delivering the curable feedstock material to a build volume via a nozzle of a deposition system;
actively curing discrete sections of the part as the curable feedstock material is being delivered to the build volume via the nozzle to additively build the part according to predetermined cure profiles for the discrete sections of the part, wherein the actively curing is computer controlled, and wherein the actively curing comprises curing a select discrete section of the part less than a remainder of the part and facilitates removal of the select discrete section from the part; and
subsequent to the actively curing, replacing the select discrete section with a distinct component, wherein the replacing the select discrete section with the distinct component comprises removing the select discrete section and embedding the distinct component in the part, wherein the distinct component is one or more of a sensor, an electronic device, an actuator, a fastener, wiring, circuitry, tubing, fiber optics, a mechanical linkage, or a sub-component.

19. The method of claim 18 , wherein the actively curing comprises curing discrete sections of the part to different levels of cure.

20. The method of claim 18 , wherein the actively curing comprises curing a first discrete section to a first level of cure and curing a second discrete section to a second level of cure, wherein the first level of cure is greater than the second level of cure.

21. The method of claim 18 , wherein the actively curing comprises curing a first discrete section according to a first cure profile and curing a second discrete section according to a second cure profile, wherein the second cure profile differs from the first cure profile.

Assignees

• Boeing Co

Inventors

• Wilenski Mark Stewart
• Kozar Michael Patrick
• Evans Nick Shadbeh

Classifications

• B29C64/209 Primary

  Heads; Nozzles · CPC title

• B33Y10/00 Primary

  Processes of additive manufacturing · CPC title

• B33Y50/02 Primary

  for controlling or regulating additive manufacturing processes · CPC title

• B29C35/0266

  Local curing (for repairing B29C73/34) · CPC title

• B29C64/135

  the energy source being concentrated, e.g. scanning lasers or focused light sources · CPC title