US 6,199,749 B1Granted

Method for manufacturing a brazed metallic honeycomb body

AssigneeEMITEC Gesellschaft fuer Emissionstechnologie mbH

InventorsLudwig Wieres, Ferdi Kurth

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Abstract

For the manufacture of a metallic honeycomb body which is wound, layered or looped from at least partially structured sheet metal layers, it is proposed to provide at least the structured sheet metal layers with a layer of rolling oil, to the extent that this is not already present in the process for manufacturing the sheet metal layers. A step for partially thermally removing highly volatile components of the rolling oil can follow. The honeycomb body manufactured from the sheet metal layers is brought into contact with a brazing powder which remains adhered to the rolling oil in particular in the area of the contact lines between the sheets. The honeycomb body is subsequently subjected to a brazing procedure in a high temperature brazing furnace under vacuum or a protective gas.

Claims16

Dependent claims

An improved method for manufacturing a metallic honeycomb body having channels running from a first end face to a second end face of the metallic honeycomb body, the improvement which comprises:

performing one of winding, layering and looping at least partially structured sheet metal layers to form the metallic honeycomb body;
applying a layer of rolling oil to the at least partially structured sheet metal layers after the at least partially structured sheet metal layers have been manufactured;
heating briefly the metallic honeycomb body formed of the at least partially structured sheet metal layers coated with the rolling oil for removing volatile components of the rolling oil from uncovered surfaces of the at least partially structured sheet metal layers;
applying a brazing powder that adheres to the rolling oil remaining on the at least partially structured sheet metal layers forming the metallic honeycomb body, whereby the brazing powder sticks directly to the rolling oil;
and
performing a brazing procedure on the metallic honeycomb body.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 09/294,704Filed 19 Apr 1999 · continuation
Priority: DE 196 42 94617 Oct 1996
Granted: 13 Mar 2001
Term ends: Not estimatedThe source records don’t support an estimate.

Classification7 codes

B23K 1/0014
Specially adapted for particular articles or work: brazing of honeycomb sandwich structures
F01N 3/281
Metal other than sintered metal: metallic honeycomb monoliths made of stacked or rolled sheets, foils or plates
F01N 2450/22
Methods or apparatus for fitting, inserting or repairing different elements: by welding or brazing
Y02A 50/20
In human health protection, e.g. against extreme weather: air quality improvement or preservation, e.g. vehicle emission control or emission…