Method for Producing an Annular Honeycomb Body, and Annular Honeycomb Body

• US 20080199654A1
• Filed: 03/10/2008
• Published: 08/21/2008
• Est. Priority Date: 09/09/2005
• Status: Active Grant

• Current Assignee: Continental Emitec GmbH
• Original Assignee: Emitec Gesellschaft für Emissionstechnologie mbH (Continental AG)
• Inventors: Kurth, Ferdi, Bruck, Rolf, Zaldua-Moreno, Naroa
• Granted Patent: US 8,075,978 B2
• Time in Patent Office: Days
• US Class Current: 428/116
• CPC Class Codes: B01J 35/56 Foraminous structures having flow-through passages or channels, e.g. grids or three-dimensional monoliths
• CPC Class Codes: F01N 2330/02 Metallic plates or honeycombs, e.g. superposed or rolled-up corrugated or otherwise deformed sheet metal
• CPC Class Codes: F01N 2330/04 Methods of manufacturing
• CPC Class Codes: F01N 3/2814 all sheets, plates or foils being corrugated
• CPC Class Codes: Y10T 29/49345 Catalytic device making
• CPC Class Codes: Y10T 428/12333 Helical or with helical component
• CPC Class Codes: Y10T 428/12347 Plural layers discontinuously bonded [e.g., spot-weld, mechanical fastener, etc.]
• CPC Class Codes: Y10T 428/1241 Nonplanar uniform thickness or nonlinear uniform diameter [e.g., L-shape]
• CPC Class Codes: Y10T 428/24149 Honeycomb-like

Abstract

A method for producing a honeycomb body includes providing an annular radial partial region with channels through which a fluid can flow. The honeycomb body is formed from at least one metallic layer fastened at least at one fastening point to an outer casing tube. Each metallic layer has alternating substantially smooth and structured sections folded onto one another. A honeycomb body is also provided. The method and the honeycomb body advantageously permit an annular honeycomb body with low material expenditure and good durability to be produced.

Claims

1. A method for producing a honeycomb body, the method comprising the following steps:

providing at least one metallic layer with alternating substantially smooth and structured sections;

folding the sections of the at least one metallic layer onto one another;

fastening the at least one metallic layer at least at one fastening point to an outer casing tube; and

forming the honeycomb body from the at least one metallic layer with an annular radial partial region having channels through which a fluid can flow.

2. The method according to claim 1, which further comprises providing the substantially smooth sections with at least one first section length and providing the structured sections with at least one second section length differing from the first section length.

3. The method according to claim 1, which further comprises connecting the at least one layer to an inner casing tube, and rotating the casing tubes relative to one another during production.

4. The method according to claim 3, wherein the connection between the at least one layer and the inner casing tube is detachable.

5. The method according to claim 4, which further comprises removing the inner casing tube after the rotating step.

6. The method according to claim 1, which further comprises separating the sections of the at least one layer by fold lines, with every second fold line being situated on one side of the at least one layer and at least one of the fold lines situated on the one side of the at least one layer including at least one fastening point.

7. The method according to claim 1, which further comprises forming the structures in the at least one layer in a substantially periodic manner, with the structures having a structure repeat length, and with the structure repeat length being increased at least at one point of the at least one layer.

8. The method according to claim 1, which further comprises forming at least one recess in at least one structured section.

9. The method according to claim 8, which further comprises forming recesses in the smooth and structured sections to provide a coherent cavity after the folding.

10. The method according to claim 1, which further comprises delimiting the at least one layer with a structured section being shorter than other sections.

11. The method according to claim 1, which further comprises fastening the at least one layer at the at least one fastening point by a material joining process.

12. The method according to claim 1, which further comprises generating at least one of the following connections in a materially joined manner at least in partial regions of the honeycomb body:

a) a connection of the at least one layer to an inner casing tube;

b) a connection of the at least one layer to the outer casing tube;

c) a connection of the at least one layer to itself; and

d) a connection of a layer to an adjacent layer of the at least one layer.

13. A honeycomb body, comprising:

an outer casing tube;

at least one metallic layer fastened at least at one fastening point to said outer casing tube, said at least one metallic layer having alternating substantially smooth and structured sections folded onto one another; and

an annular radial partial region with channels through which a fluid can flow.

14. The honeycomb body according to claim 13, wherein said sections individually have a substantially involute curvature.

15. The honeycomb body according to claim 13, wherein said smooth sections have at least one first section length and said structured sections have at least one second section length differing from said first section length.

16. The honeycomb body according to claim 13, which further comprises an inner casing tube to which said at least one layer is connected at least in partial regions.

17. The honeycomb body according to claim 13, wherein said sections of said at least one layer are separated by fold lines, every second fold line is situated on one side of said at least one layer and at least one of said fold lines situated on said one side of said at least one layer is connected at least in partial regions to said outer casing tube.

18. The honeycomb body according to claim 13, wherein said structured sections have structures with a structure repeat length, and said structure repeat length is increased at least at one point of said at least one layer.

19. The honeycomb body according to claim 13, wherein at least one structured section has at least one recess.

20. The honeycomb body according to claim 19, wherein said smooth and structured sections have recesses forming a coherent cavity.

21. The honeycomb body according to claim 13, which further comprises a materially joined connection at said at least one fastening point.

22. The honeycomb body according to claim 13, which further comprises at least one of the following connections including a materially joined connection:

a) a connection of said at least one layer to an inner casing tube;

b) a connection of said at least one layer to said outer casing tube;

c) a connection of said at least one layer to itself; and

d) a connection of a layer to an adjacent layer of said at least one layer.