Systems and methods for co-casting of additively manufactured interface nodes

Patent metadata

Field	Value
Publication number	US-11420262-B2
Application number	US-201815885350-A
Country	US
Kind code	B2
Filing date	Jan 31, 2018
Priority date	Jan 31, 2018
Publication date	Aug 23, 2022
Grant date	Aug 23, 2022

Abstract

Systems and methods for co-casting of additively manufactured, high precision Interface Nodes are disclosed. The Interface Node includes an integrated structure including one or more complex or sophisticated features and functions. Co-casting of Interface Nodes by casting a part onto the Interface Node results in a hybrid structure comprising the cast part and the additively manufactured Interface Node. The interface node may include at least one of a node-to-tube connection, node-to-panel connection, or a node-to-extrusion connection. In an embodiment, engineered surfaces may be provided on the Interface Node to improve the blend between the Interface Node and the cast part during the co-casting process.

First claim

What is claimed is:

1. An apparatus, comprising:
an additively manufactured node having a co-cast feature;
a casting mold; and
a cast part contained in the casting mold, the cast part cast around at least a first portion of the additively manufactured node including the co-cast feature, wherein the co-cast feature cooperates with the cast part to form a hybrid part including the first portion of the additively manufactured node and the cast part, and
wherein the co-cast feature is internal to the casting mold and a second portion of the additively manufactured node is external to the casting mold.

2. The apparatus of claim 1 , wherein the additively manufactured node comprises an interface node.

3. The apparatus of claim 2 , wherein the interface node comprises at least one of a node-to-extrusion connection, node-to-panel connection, or a node-to-tube connection.

4. The apparatus of claim 1 , wherein the additively manufactured node is configured to have a melting point that is higher than a melting point of the cast part.

5. The apparatus of claim 1 , wherein the additively manufactured node comprises a first material having a higher strength than a second material of the cast part.

6. The apparatus of claim 1 , wherein the co-cast feature further comprises an engineered surface having a non-flat surface that provides an increased surface area within the cast part.

7. The apparatus of claim 1 , wherein the cast part is cast around the at least first portion of the additively manufactured node using a casting tool.

8. The apparatus of claim 1 , wherein the additively manufactured node further comprises an anti-rotation feature located at and engaging with an external surface of the cast part.

9. The apparatus of claim 1 , wherein the additively manufactured node further comprises an interface surface and a sealant covering the interface surface, wherein the interface surface is configured to receive a component part connectable with the additively manufactured node, and wherein the sealant is configured to separate the interface surface and the component part from physical contact upon connection of the component part to the additively manufactured node.

10. The apparatus of claim 1 , wherein the additively manufactured node has a first structural complexity greater than a second structural complexity of the cast part.

11. The apparatus of claim 1 , wherein the additively manufactured node and the cast part are connected such that a portion of the additively manufactured node extends outside of the cast part.

12. The apparatus of claim 1 , wherein the additively manufactured node further comprises a flange secured to an external surface of the casting mold.

13. The apparatus of claim 12 , wherein the flange is secured to the external surface of the casting mold by one or more mechanical fastening features.

14. A method, comprising:
additively manufacturing a node having a co-cast feature; and
casting a part contained in a casting mold, the cast part cast around at least a first portion of the additively manufactured node including the co-cast feature, wherein the co-cast feature cooperates with the cast part to form a hybrid part including the first portion of the additively manufactured node and the cast part,
wherein the co-cast feature is internal to the casting mold and a second portion of the additively manufactured node is external to the casting mold.

15. The method of claim 14 , wherein the additively manufactured node comprises an interface node.

16. The method of claim 14 , wherein additively manufacturing the interface node comprises forming at least one of a node-to-extrusion connection, node-to-panel connection, or a node-to-tube connection.

17. The method of claim 14 , wherein the additively manufactured node is configured to have a melting point that is higher than a melting point of the cast part.

18. The method of claim 14 , wherein the additively manufactured node comprises a first material having a higher strength than a second material of the cast part.

19. The method of claim 14 , further comprising additively manufacturing the node with the co-cast feature having an engineered surface having a non-flat surface that provides an increased surface area within the cast part.

20. The method of claim 14 , wherein the additively manufactured node further comprises an anti-rotation feature located at and engaging with an external surface of the cast part.

21. The method of claim 14 , wherein the additively manufactured node further comprises a groove for a sealant.

22. The method of claim 14 , wherein the casting mold is fixtured to the node using a mechanical fastener.

Assignees

• Divergent Tech Inc

Inventors

• Lakshman Narender Shankar
• Tenhouten Broc William
• Czinger Kevin Robert
• Martinez Antonio Bernerd
• Gunner Jon Paul
• Zafar Muhammad Faizan

Classifications

• B32B15/01 Primary

  all layers being exclusively metallic {(making layered metal workpieces by pressure cladding B23K20/22; making coatings with a metallic material characterised by its composition C23C30/00)} · CPC title

• B22F12/52

  Hoppers · CPC title

• B22F12/49

  Scanners · CPC title

• B22F10/28

  Powder bed fusion, e.g. selective laser melting [SLM] or electron beam melting [EBM] · CPC title

• B33Y40/20

  Post-treatment, e.g. curing, coating or polishing · CPC title