Additive manufacturing of a unibody vehicle

Patent metadata

Field	Value
Publication number	US-10022912-B2
Application number	US-201514940926-A
Country	US
Kind code	B2
Filing date	Nov 13, 2015
Priority date	Nov 13, 2015
Publication date	Jul 17, 2018
Grant date	Jul 17, 2018

Abstract

Methods for manufacturing structures are provided. The methods include manufacturing a shell structure by additive manufacturing methods and sectioning panels with predetermined shapes from the shell structure. The panels are subsequently coupled to shell structure. Devices for performing various steps of the methods are also provided.

First claim

What is claimed is:

1. A method for manufacturing a unitary structure, the method comprising:
additive manufacturing a shell template of the unitary structure in a layer-by-layer printing process, wherein the shell template comprises an interior surface and an exterior surface;
applying a reinforcing material to the exterior surface of the shell template;
treating the reinforcing material to generate a reinforced shell comprising a reinforcing composite;
sectioning at least one panel with a predetermined shape out of the reinforced shell at a predetermined location;
removing the panel from the reinforced shell; and
coupling the panel to the reinforced shell such that the panel is operable to open and close at the predetermined location from where the panel was removed from the reinforced shell.

2. The method according to claim 1 , wherein the sectioning of the at least one panel comprises at least one of cutting, carving, sawing, slicing, snipping, melting, or etching a panel with a predetermined shape out of the shell template at the predetermined location.

3. The method according to claim 1 , wherein the unitary structure is a vehicle body and a plurality of panels are sectioned, removed from, and coupled to the reinforced shell to form vehicle parts selected from the group consisting of doors, trunk lids, hoods, hatchbacks, fuel door covers, electrical outlet doors, scoops, and combinations thereof.

4. The method according to claim 1 , further comprising:
modifying at least one of the shell template at the predetermined location and the panel.

5. The method according to claim 4 , wherein the modifying comprises additive manufacturing at least one layer of material on an edge of the reinforced shell that is exposed when the panel is removed.

6. The method according to claim 5 , wherein the unitary structure is a vehicle body and the modifying of the panel comprises removing a portion of the panel at a location where a window is to be disposed.

7. The method according to claim 1 , further comprising:
applying a clear coat or paint to at least one of the reinforced shell or panel.

8. The method according to claim 1 , wherein the applying of the reinforcing material is done by applying a reinforcing composite pre-preg material having reinforcing fibers selected from the group consisting of carbon fibers, glass fibers, aramid fibers, boron fibers, ceramic fibers, polyester fibers, ultra-high molecular weight polyethylene (UHMWPE) fibers, and combinations thereof.

9. The method according to claim 8 , wherein the applying of the reinforcing material to the exterior surface of the shell template comprises aligning the reinforcing fibers in a predetermined orientation.

10. The method according to claim 1 , wherein the treating comprises curing or solidifying a resin in the reinforcing material or the shell template.

11. The method according to claim 1 , further comprising:
additive manufacturing a frame structure within the interior surface of the shell template to generate a unibody for a vehicle.

12. The method according to claim 1 , wherein the additive manufacturing the shell template comprises additive manufacturing a shell template composed of a metal, a polymer, or both a metal and a polymer.

13. A method for manufacturing a unitary structure, the method comprising:
additive manufacturing a shell template of the unitary structure in a layer-by-layer printing process, wherein the shell template comprises an interior surface and an exterior surface;
sectioning at least one panel with a predetermined shape out of the shell template at a predetermined location;
removing the at least one panel from the shell template;
modifying the at least one panel or the shell template by creating at least one layer of material on an edge of the shell template or panel that is exposed when the panel is removed via additive manufacturing; and
coupling the at least one panel to the shell template at the predetermined location.

14. The method according to claim 13 , further comprising:
applying a reinforcing material to the exterior surface of the shell template; and
treating the reinforcing material to generate a reinforced shell,
wherein applying and treating are performed prior to the sectioning.

15. A method for manufacturing a unibody of a vehicle; the method comprising:
generating a shell template via a layer-by-layer additive manufacturing process, wherein the shell template comprises an interior surface and an exterior surface;
applying a reinforcing composite material precursor to the exterior surface of the shell template comprising a resin and a plurality of fibers;
treating the reinforcing composite material precursor to generate a reinforced shell;
sectioning one or more panels with predetermined shapes out of the reinforced shell at one or more predetermined locations;
removing the one or more panels from the reinforced shell;
generating a frame structure about the interior surface of the reinforced shell via a layer-by-layer additive manufacturing process; and
coupling the one or more panels to the reinforced shell at the corresponding one or more predetermined locations, wherein the one or more panels correspond to a vehicle component selected from the group consisting of doors, trunk lids, hoods, hatchbacks, fuel door covers, electrical outlet doors, scoops, and combinations thereof.

16. The method according to claim 15 , further comprising printing at least one of wires and electrical contacts directly on at least one of the reinforced shell and the one or more panels with an electrically conducting material.

17. The method according to claim 15 , further comprising:
prior to coupling the one or more panels to the reinforced shell, preparing a portion of the panels as doors by modifying the portion of panels with components selected from the group consisting of a window, lock, actuator, motor, hinges, switches, knobs, and combinations thereof.

18. The method according to claim 15 , wherein the generating the shell template further comprises printing a layer comprising a reinforcing lattice structure to define one of the layers forming the shell template.

19. The method according to claim 15 , wherein the applying of the reinforcing composite precursor material is done by applying a reinforcing composite pre-preg material having reinforcing fibers selected from the group consisting of carbon fibers, glass fibers, aramid fibers, boron fibers, ceramic fibers, polyester fibers, ultra-high molecular weight polyethylene (UHMWPE) fibers, and combinations thereof.

20. The method according to claim 15 , wherein the generating the shell template via the layer-by-layer additive manufacturing process comprises printing a first material and a second material, wherein the second material is heavier than the first material and positioned at predetermined locations to create a predetermined center of gravity.

Assignees

• Gm Global Tech Operations Llc

Inventors

• Kia Hamid G
• Huang Ningjian
• Spicer John P
• Arinez Jorge F

Classifications

• B29C70/545

  Perforating, cutting or machining during or after moulding · CPC title

• B29K2233/04

  Polymers of esters · CPC title

• B33Y10/00 Primary

  Processes of additive manufacturing · CPC title

• B29K2223/0683

  UHMWPE, i.e. ultra high molecular weight polyethylene · CPC title

• B33Y80/00

  Products made by additive manufacturing · CPC title