Apparatus and methods for connecting nodes to tubes in transport structures
Apparatus and methods for joining nodes to tubes with node to tube joints are presented herein. Joining techniques allow the connection of additively manufactured nodes to tubes. In an embodiment, at least one node may be joined to a tube and may be a part of a vehicle chassis. The node to tube joint connection incorporates adhesive bonding between the node to tube to realize the connection. Sealants may be used to provide sealed regions for adhesive injection, which are housed in sealing interfaces co-printed with the additively manufactured nodes. Additionally, seals may act as isolators and reduce galvanic corrosion.
1. An apparatus, comprising:
a node comprising:
a node wall having a perimeter, wherein the node wall includes a plurality of openings to a plurality of channels in the node;
a plurality of sealing interfaces around the perimeter, the sealing interfaces configured to form a plurality of chambers, wherein each chamber is between two of the sealing interfaces, and
a first adhesive path comprising the plurality of chambers and the plurality of channels, wherein the channels connect the chambers together to form the first adhesive path.
2. The apparatus of claim 1 , wherein the plurality of sealing interfaces and the node wall form a first annular region.
3. The apparatus of claim 2 , further comprising a port coupled to the first adhesive path.
4. The apparatus of claim 3 , wherein the port is an adhesive port directly connected to the first annular region.
5. The apparatus of claim 3 , wherein the port is an outlet port directly connected to the first annular region.
6. The apparatus of claim 3 , wherein the port is recessed.
7. The apparatus of claim 3 , wherein the port protrudes.
8. The apparatus of claim 3 , wherein the port is a hole.
9. The apparatus of claim 2 , further comprising a tube, wherein the plurality of sealing interfaces, the node wall and a wall of the tube form a sealant chamber.
10. The apparatus of claim 2 ,
wherein the node further comprises a plurality of annular regions;
wherein the plurality of annular regions comprises the first annular region; and
wherein a width for at least one of the plurality of annular regions is based on an anticipated load of a connection between the node and a tube coupled to the node.
11. The apparatus of claim 1 , wherein at least one sealing interface in the plurality of sealing interfaces comprises a mechanical seal.
12. The apparatus of claim 11 , wherein the mechanical seal comprises at least one of an O-ring or a gasket.
13. A method, comprising:
manufacturing a node comprising:
a node wall having a perimeter, wherein the node wall includes a plurality of openings to a plurality of channels in the node;
a plurality of sealing interfaces around the perimeter, the plurality of sealing interfaces configured to form a plurality of chambers, wherein each chamber is between two of the sealing interfaces, and
a first adhesive path comprising the plurality of chambers and the plurality of channels, wherein the channels connect the chambers together to form the first adhesive path.
14. The method of claim 13 , wherein the plurality of sealing interfaces and the node wall form a first annular region.
15. The method of claim 14 , further comprising manufacturing the node comprising an adhesive port coupled to the first adhesive path.
16. The method of claim 15 , wherein the adhesive port is directly connected to the first annular region.
17. The method of claim 14 , further comprising manufacturing the node comprising an outlet port coupled to the first adhesive path.
18. The method of claim 17 , wherein the outlet port is directly connected to the first annular region.
19. The method of claim 14 , further comprising coupling a tube to the node, wherein the plurality of sealing interfaces, the node wall, and a wall of the tube form a sealant chamber.
20. The method of claim 19 , further comprising:
drawing a vacuum to evacuate the sealant chamber; and
injecting an adhesive into the sealant chamber to create an adhesive fill.
21. The method of claim 14 ,
wherein the node further comprises a plurality of annular regions;
wherein the plurality of annular regions comprise the first annular region; and
wherein the method further comprises selecting a width for at least one of the plurality of annular regions based on an anticipated load of a connection between the node and a tube coupled to the node.
22. The method of claim 13 , wherein the first sealing interface comprises a mechanical seal.
23. The method of claim 22 , wherein the mechanical seal comprises at least one of an O-ring or a gasket.
24. The method of claim 13 , wherein manufacturing the node comprises additively manufacturing the node.