Hybrid methods of additive manufacturing

Patent metadata

Field	Value
Publication number	US-11014292-B2
Application number	US-201816132915-A
Country	US
Kind code	B2
Filing date	Sep 17, 2018
Priority date	Sep 17, 2018
Publication date	May 25, 2021
Grant date	May 25, 2021

Abstract

A hybrid method of additive manufacturing is provided. The method includes providing a powder material and fusing, by a first heat source, a portion of the powder material to form a three-dimensional structure. The three-dimensional structure can define a fill region at least partially filled with the powder material. The method further includes fusing, by a second heat source, the powder material in the fill region. Fusing the powder material in the fill region can solidify the powder material in the fill region and fuse the powder material to the three-dimensional structure for forming a solid object.

First claim

What is claimed is:

1. A method, comprising:
providing a powder material, the powder material defining a first material;
fusing, by a first heat source, a portion of the powder material to form a three-dimensional structure, the three-dimensional structure defining a fill region and a vacuum port, the fill region being at least partially filled with the powder material;
adding a second material to the fill region;
applying a vacuum to the vacuum port to compact the powder material and the second material in the fill region, the vacuum port retaining a vacuum head including a filter configured to prevent evacuation of the powder material from the fill region; and
fusing, by a second heat source, the second material and the powder material in the fill region to solidify the second material and the powder material in the fill region and fuse the second material and powder material to the three-dimensional structure to form a solid object, the powder material having a first melting temperature, the second material having a second melting temperature, and the second melting temperature being lower than the first melting temperature.

2. The method of claim 1 , wherein the first heat source includes a laser beam or an electron beam.

3. The method of claim 2 , wherein the second heat source includes a hot isostatic pressure furnace.

4. The method of claim 1 , further comprising:
vibrating the three-dimensional structure to compact the second material and the powder material in the fill region.

5. The method of claim 1 , wherein the powder material comprises a metal or a metal alloy.

6. The method of claim 1 , wherein the solid object comprises an engine component.

7. A method, comprising:
fusing, by a first heat source, a metal powder to form a three-dimensional structure, the three-dimensional structure defining a fill region and a port;
providing a powder material in the fill region;
applying a vacuum to the port to compact the powder material in the fill region, the port retaining a vacuum head including a filter configured to prevent evacuation of the powder material from the fill region; and
fusing, by a second heat source, the powder material in the fill region to solidify the powder material in the fill region and fuse the powder material to the three-dimensional structure to form a solid object, the metal powder having a first melting temperature, the powder material having a second melting temperature, and the second melting temperature being lower than the first melting temperature.

8. The method of claim 7 , wherein the powder material and the metal powder are a same material.

9. The method of claim 7 , Wherein the powder material and the metal powder are different materials.

10. The method of claim 7 , wherein the powder material includes a glass component, a ceramic component, a polymeric component, a metal component, or a combination thereof.

11. The method of claim 7 , wherein the first heat source includes a laser beam or an electron beam.

12. The method of claim 7 , wherein the second heat source includes a hot isostatic pressure furnace.

13. A method, comprising:
providing a first powder material in a powder bed;
forming, by a first heat source, a three-dimensional structure in the powder bed, the three-dimensional structure defining a fill region and a port;
removing the three-dimensional structure from the powder bed;
filling the fill region with a second material;
applying a vacuum to the port, the port retaining a vacuum head including a filter; and
fusing, by a second heat source, the second material in the fill region to solidify the second material in the fill region and fuse the second material to the three-dimensional structure to form a solid object, the first powder material having a first melting temperature, the second material having a second melting temperature, and the second melting temperature being lower than the first melting temperature.

14. The method of claim 13 ; wherein the second material is in a powder form or in a liquid form.

15. The method of claim 13 , wherein the first powder material includes a glass component, a ceramic component, a polymeric component, a metal component, or a combination thereof.

16. The method of claim 13 , wherein the first heat source includes a laser beam or an electron beam.

17. The method of claim 1 , wherein a sealing member is placed in the vacuum port to seal the powder material inside the three-dimensional structure.

18. The method of claim 13 , wherein a sealing member is placed in the vacuum port to seal the second material inside the fill region.

Assignees

• Caterpillar Inc

Inventors

• Marchione Thierry

Classifications

• B29C64/153 Primary

  using layers of powder being selectively joined, e.g. by selective laser sintering or melting · CPC title

• B22F12/63

  Rollers · CPC title

• B22F12/52

  Hoppers · CPC title

• B22F10/64

  by thermal means (control of energy beam parameters for post heating B22F10/364) · CPC title

• B22F10/47

  characterised by structural features · CPC title