Systems and methods for additive manufacturing flow control devices

Patent metadata

Field	Value
Publication number	US-10814430-B2
Application number	US-201815948648-A
Country	US
Kind code	B2
Filing date	Apr 9, 2018
Priority date	Apr 9, 2018
Publication date	Oct 27, 2020
Grant date	Oct 27, 2020

Abstract

A flow control device for an additive manufacturing system is provided. The flow control device includes a gas supply configured to discharge a gas, a first flow modifier configured to modify at least one flow characteristic of a first portion of the gas, and a second flow modifier configured to cooperate with the first flow modifier to modify the at least on flow characteristic of the first portion of the gas. The second flow modifier is further configured to modify at least one flow characteristic of a second portion of the gas, and the first flow modifier and the second flow modifier are configured to cooperate to direct at least a portion of the first portion and the second portion of the gas towards a melt pool in a plurality of particles.

First claim

What is claimed is:

1. A flow control device for an additive manufacturing system, the additive manufacturing system defining a first direction, a second direction orthogonal to the first direction, and a third direction orthogonal to the first and second directions, said flow control device comprising:
a gas supply comprising a first gas supply and a second gas supply, wherein said first gas supply is configured to discharge a first portion of a gas along the first direction, and wherein said second gas supply is configured to discharge a second portion of the gas along the third direction;
a first flow modifier configured to modify at least one flow characteristic of the first portion of the gas; and
a second flow modifier configured to cooperate with the first flow modifier to modify the at least one flow characteristic of the first portion of the gas, wherein said second flow modifier is further configured to modify at least one flow characteristic of the second portion of the gas, and wherein said first flow modifier and said second flow modifier are configured to cooperate to direct at least a portion of the first portion and the second portion of the gas towards a melt pool in a build layer.

2. The flow control device in accordance with claim 1 , wherein said first flow modifier is coupled to a recoater configured to move along the first direction and to distribute a plurality of particles across the build layer.

3. The flow control device in accordance with claim 1 , wherein said first flow modifier comprises a first flow feature extending along the second direction, and wherein said second flow modifier comprises at least one second flow feature extending along the second direction.

4. The flow control device in accordance with claim 3 , wherein at least one of said first flow feature and said second flow feature is configured to rotate about an axis substantially aligned with the second direction.

5. The flow control device in accordance with claim 3 , wherein each of said first flow feature and said second flow feature is at least one of an airfoil shape, a spherical shape, a ramp shape, a nozzle shape, and a hyperbolic shape.

6. The flow control device in accordance with claim 3 , wherein said first flow feature and said second flow feature are positioned such that the first portion of the gas is accelerated while passing between said first flow feature and said second flow feature.

7. An additive manufacturing system defining a first direction, a second direction orthogonal to the first direction, and a third direction orthogonal to the first and second directions, said additive manufacturing system comprising:
an enclosure comprising:
a build layer comprising a plurality of particles;
a gas supply configured to discharge a gas;
a first flow modifier comprising a first flow feature extending along the second direction and configured to modify at least one flow characteristic of a first portion of the gas; and
a second flow modifier comprising at least one second flow feature extending along the second direction and configured to cooperate with the first flow modifier to modify the at least one flow characteristic of the first portion of the gas, wherein said second flow modifier is further configured to modify at least one flow characteristic of a second portion of the gas, wherein at least one of said first flow feature and said second flow feature is configured to rotate about an axis substantially aligned with the second direction; and

a consolidation device configured to generate a melt pool in the build layer, wherein said first flow modifier and said second flow modifier are configured to cooperate to direct at least a portion of the first portion and the second portion of the gas towards the melt pool in the build layer.

8. The additive manufacturing system in accordance with claim 7 , wherein said first flow modifier is coupled to a recoater configured to move along the first direction and to distribute a plurality of particles across the build layer.

9. The additive manufacturing system in accordance with claim 7 , wherein said gas supply comprises a first gas supply and a second gas supply, wherein said first gas supply is configured to discharge the first portion of the gas along the first direction, and wherein said second gas supply is configured to discharge the second portion of the gas along the third direction.

10. The additive manufacturing system in accordance with claim 7 , wherein each of said first flow feature and said second flow feature is at least one of an airfoil shape, a spherical shape, a ramp shape, a nozzle shape, and a hyperbolic shape.

11. The additive manufacturing system in accordance with claim 7 , wherein said first flow feature and said second flow feature are positioned such that the first portion of the gas is accelerated while passing between said first flow feature and said second flow feature.

12. A method of fabricating a component using an additive manufacturing system, the additive manufacturing system defining a first direction, a second direction orthogonal to the first direction, and a third direction orthogonal to the first and second directions, said method including:
discharging a first portion of the gas from a first gas supply along the first direction and discharging a second portion of the gas from a second gas supply along the third direction;
operating a consolidation device to direct an energy beam to form a melt pool in a build layer within the enclosure;
modifying at least one flow characteristic of a first portion of the gas using a first flow modifier in cooperation with a second flow modifier; and
modifying at least one flow characteristic of a second portion of the gas using the second flow modifier, wherein the first flow modifier and the second flow modifier are configured to cooperate to direct at least a portion of the first portion and the second portion of the gas towards the melt pool.

13. The method in accordance with claim 12 , wherein modifying at least one flow characteristic of the first portion of the gas wherein modifying at least one flow characteristic of the first portion of the gas comprises using a first flow modifier coupled to a recoater configured to move along the first direction and to distribute a plurality of particles across the build layer.

14. The method in accordance with claim 12 , wherein modifying at least one flow characteristic of the first portion of the gas wherein modifying at least one flow characteristic of the first portion of the gas comprises using a first flow feature extending along the second direction and comprising at least one of an airfoil shape, a spherical shape, a ramp shape, a nozzle shape, and a hyperbolic shape.

15. The method in accordance with claim 12 , wherein modifying at least one flow characteristic of the second portion of the gas wherein modifying at least one flow characteristic of the first portion of the gas comprises using a second flow feature extending along the second direction and comprising at least one of an airfoil shape, a spherical shape, a ramp shape, a nozzle shape, and a hyperbolic shape.

16. The method in accordance with claim 12 , modifying at least one flow characteristic of the first portion of the gas wherein modifying at least one flow characteristic of the first portion of the gas comprises positioning the first flow modifier and the second flow modifier such that the first portion of the gas is accelerated while passing between the first flow modifier and the second flow modifier.

Assignees

• Gen Electric

Inventors

• Wakelam Christian
• Du Cauze De Nazelle Rene
• Fischer Daniel
• Haderlein Hannes
• Engel Viktor
• Hoefler Florian
• Levine Rachel Wyn

Classifications

• B23K26/123 Primary

  in an atmosphere of particular gases · CPC title

• B22F10/322

  of the gas flow, e.g. rate or direction · CPC title

• B22F10/12

  by photopolymerisation, e.g. stereolithography [SLA] or digital light processing [DLP] · CPC title

• B22F12/70

  Gas flow means · CPC title

• B22F10/68

  Cleaning or washing · CPC title