DE102004052538A1 - Honeycomb body used as a catalyst carrier body in a vehicle exhaust gas system comprises a casing tube having partial regions each with an inner diameter in the longitudinal direction - Google Patents

Abstract

Honeycomb body (1) comprises a casing tube (3) having partial regions (9, 10, 11) each with an inner diameter (12, 13, 14) in the longitudinal direction. The second partial region (10) lies with a second inner diameter (13) in the longitudinal direction between the first partial region (9) and the third partial region (11). The first and third inner diameters are smaller than the second inner diameter. An independent claim is also included for a process for the production of a honeycomb body.

Description

object The present invention is a honeycomb body, in particular a catalyst carrier body for Use in the exhaust system of an automobile, in which a honeycomb structure is held in a jacket tube, wherein the honeycomb structure in particular directly above Force and / or positive connection is connected to the jacket tube. Farther is a method of making a corresponding honeycomb body subject the invention.

Become honeycomb body For example, in exhaust systems of motor vehicles, in particular of Automobiles, powered two-wheeled vehicles, airplanes or watercraft, used. The possible Applications include in addition to the use as a catalyst carrier body also in particular the use as a filter body. Honeycombs can be ceramic and / or metallic and have channels, through which the exhaust gas can flow. These honeycomb bodies can consist of a honeycomb structure, which is fixed in a jacket tube is, wherein the jacket tube is connected to the exhaust system.

For fixation the honeycomb structure in the casing tube, various methods are known the on a material connection between honeycomb structure and casing pipe based. For example, it is known that the outer surface of the honeycomb structure with full or partial area the inner surface to solder the jacket pipe or also in some areas a weld between casing and Carry out honeycomb structure. Also the connection between honeycomb structure and casing over an intermediate piece is known.

All These compounds are relatively complex and therefore time and cost inks to produce siv. On this basis, therefore, is the present Invention, the object to provide a honeycomb body, in which a simple and inexpensive Connection between jacket tube and honeycomb structure is formed, and propose a corresponding manufacturing process.

These Task is solved through a honeycomb body with the features of claim 1 and a method with the features of claim 12. Advantageous developments are the subject of respective dependent Claims.

Of the honeycomb body according to the invention can in particular serve as a catalyst carrier body. He comprises an at least partially metallic honeycomb structure with in a longitudinal direction at least partially permeable cavities in a jacket tube, wherein the jacket tube in the longitudinal direction at least three Partitions each having an inner diameter, wherein a second portion with a second inner diameter in the longitudinal direction lies between a first and a third subregion whose Inner diameter are smaller than the second inner diameter.

Especially corresponds to the length of the second portion preferably substantially a length of Honeycomb structure, so that advantageously fixation of the Honeycomb structure is achieved in the jacket tube in particular in the longitudinal direction. These Fixation in the longitudinal direction in particular, only force and / or form-fitting without training an additional cohesive Connection and without an intermediate element between jacket tube and honeycomb structure such as a cuff, an intermediate coat or a Swelling mat. First and third inner diameter can be unequal be.

• a) Kraftschluss oder
• b) Formschluss.

Furthermore, a honeycomb body, in particular catalyst carrier body is proposed, which may in particular also be a development of the honeycomb body described above. This comprises an at least partially metallic wafer structure with cavities which can be at least partially perfused in a longitudinal direction, wherein the honeycomb structure is connected to the jacket tube in at least one of the following ways:

• a) adhesion or
• b) positive locking.

Prefers Here is the connection between the honeycomb structure and casing pipe directly, ie without further connection means, in particular without that formed a material connection between honeycomb structure and casing pipe is. In particular, no swelling mat or the like is formed between honeycomb structure and casing pipe. The connection is made So preferably in an advantageous manner exclusively by a force and / or Form-fitting. The force and / or positive connection causes in particular a fixation of the honeycomb structure in the longitudinal direction of the honeycomb body.

The non-cohesive connection between honeycomb structure and jacket tube described here is particularly suitable for honeycomb bodies with small cell densities, ie numbers of cavities per cross section, in particular those of cell densities of less than 600 cpsi (cells per square inch), preferably less than 400 cpsi, more preferably less than 200 cpsi. Preference is given to the use of such honeycomb body in exhaust systems, in which the exhaust gas temperature is relatively low, in particular in the exhaust system of motorized two-wheelers with small displacements and small vehicles. As a Mantelrorhr me in particular formed a metallic jacket. Preferably, the honeycomb structure does not have a polygonal cross-section, particularly preferably the cross-section is round or elliptical.

• a) Aufwickeln mindestens einer zumindest teilweise strukturierten Lage;
• b) Aufwickeln mindestens einer zumindest teilweise strukturierten und mindestens einer im wesentlichen glatten Lage;
• c) Stapeln einer Mehrzahl von zumindest teilweise strukturierten Lagen zu mindestens einem Stapel und Verwinden mindestens eines Stapels; oder
• d) Stapeln einer Mehrzahl von zumindest teilweise strukturierten Lagen und im wesentlichen glatter Lagen zu mindestens einem Stapel und Verwinden mindestens eines Stapels.

According to an advantageous embodiment of the honeycomb body according to the invention, the honeycomb structure is produced by one of the following methods:

• a) winding at least one at least partially structured layer;
• b) winding at least one at least partially structured and at least one substantially smooth layer;
• c) stacking a plurality of at least partially structured layers into at least one stack and twisting at least one stack; or
• d) stacking a plurality of at least partially structured layers and substantially smooth layers to at least one stack and twisting at least one stack.

One at least partially metallic honeycomb body may in preferred by the described methods are formed from layers. in this connection form the structures of the at least partially structured layers for the Fluid at least partially permeable cavities, in particular channels. These form between structured areas and adjacent smooth ones and / or structured areas. Below essentially smoother Location is understood in this context, a situation that a Has structure whose amplitude is smaller, preferably substantially smaller than the amplitude of the structure of the at least partially structured layer is. As structures are in particular at least in one spatial direction understood periodic structures like waves. Under layers are in in this context, in particular sheet metal layers, partially porous layers, Filter layers and / or nonwoven layers to understand. On the layers can also a coating, for example applied with a washcoat be. The partially porous Layers as well as the filter and nonwoven layers comprise at least one the following materials: a) metal or b) ceramic. Especially Fiber layers can so from composite material of ceramic and metallic fibers be educated. Also a combination of the previously mentioned species of layers (eg a fiber layer reinforced with pieces of sheet metal) is according to the invention and as Able to understand. A honeycomb body according to this The invention may be formed of various types of layers. The honeycomb structure thus formed become depending on the type of winding or twisting, for example, as a helical, S, SM or involute honeycomb structure designated. Advantageously, in particular in the case of spiral honeycomb bodies Honeycomb structure soldered in, to ensure the cohesion of the honeycomb structure as such.

• a) Kraftschluss oder
• b) Formschluss.

According to a further advantageous embodiment of the honeycomb body according to the invention, the at least one layer is connected in contact areas with itself or with another layer in at least one of the following ways:

• a) adhesion or
• b) positive locking.

Prefers Here is a connection only by the force and / or positive connection without the formation of another cohesive or joining technical Connection like soldering or welding. In particular, the positive and / or positive connection by a bias of the honeycomb body improved become. Preferably, the purely positive and / or positive connection in an S-shaped honeycomb body, there such a regularly not can telescope. Telescoping means the relative Displacement of individual parts of the honeycomb structure in the longitudinal direction, So in the flow direction the exhaust gas when used in the exhaust system of a motor vehicle.

According to one further advantageous embodiment of the honeycomb body according to the invention the honeycomb structure at least one sheet metal layer, in particular one Thickness less than 250 μm (microns), preferably less than 150 μm, more preferably less than 60 microns.

The Use of sheet metal layers of the thickness described above, at least as part of the layers used allows at least partially elastic Reduction of the diameter of the honeycomb structure from a value that bigger or is equal to the second inner diameter, to a value less than first or third inner diameter, so that the honeycomb structure can be pushed into the jacket tube and then after reaching of the second portion by a corresponding restoring force due to the at least partial elastic reduction of the diameter again widens to the second inner diameter.

According to one further advantageous embodiment the honeycomb body according to the invention are the first and third part formed by beads.

Under Beading is here in particular a projection to understand, for example a partial or fuller Projection of the jacket tube. Preferred here is the training of beads, whose distance in the longitudinal direction essentially a length of Honeycomb structure corresponds. this leads to to a reliable Fixation of the honeycomb structure in the longitudinal direction. Under the distance of the beads is in particular the expansion in longitudinal direction of the space lying within the beads, that of the second Diameter.

According to one further advantageous embodiment the honeycomb body according to the invention at least one of the beads in the longitudinal direction of the honeycomb body bevelled.

Especially the bead forms a cone through which the diameter of the honeycomb structure when pushed into the jacket tube in a simple manner except for the first or third inner diameter, ie the inner diameter the bead, is reduced.

According to one further advantageous embodiment the honeycomb body according to the invention the jacket tube is single-layered.

single-layered in this context means that the jacket tube consists of a single layer, in particular a sheet metal layer is formed. The second part is made by sheet metal forming process, in particular by pressing or Pull, allowing a widening of the inner diameter of the jacket tube in the second subarea through these procedures.

According to one further advantageous embodiment the honeycomb body according to the invention the jacket tube is multi-layered, in particular two-layered, wherein at least one inner layer only in the first and third sub-area is trained.

For example the jacket tube consists of two tubes, the first and the third Partial area with an inner diameter form and a third Pipe whose second inner diameter is substantially the outer diameter of the jacket tube in the first and third part of the range is equal to or greater. The first and second tubes are spaced longitudinally of the tubes aligned in alignment. About these tubes is the third Tube designed so that the distance between the other two Pipes is bridged by the third pipe and transition areas exist between the tubes, in which, for example, cohesive connections are formed between the tubes. However, the training can the inner and outer layer already according to the formation of the actual jacket tube respectively.

According to one further advantageous embodiment the honeycomb body according to the invention the jacket tube in one piece educated.

This means in particular that the jacket tube already during insertion of the Honeycomb structure is integral with the jacket tube, so that the jacket tube not after insertion the honeycomb structure in the casing tube, for example, composed of two parts and then this joining technology get connected. Such a subsequent connection of parts of the jacket tube with already inserted honeycomb structure can be regularly on the final product prove.

• a) kraftschlüssig oder
• b) formschlüssig.

According to a further advantageous embodiment of the honeycomb body according to the invention, the first and the third partial region fix the honeycomb structure in at least one of the following ways:

• a) non-positive or
• b) positive fit.

Especially is no additional cohesive Formed connection between honeycomb structure and beads. The fixation takes place in particular in the longitudinal direction.

Prefers is the use of the honeycomb body in Exhaust systems of motor vehicles, in particular automobiles, Two wheels Aircraft and / or boats, particularly preferably as a catalyst carrier body or Filter body. Preferably, the honeycomb body be coated, in particular with a catalytically active coating, especially in subregions of the honeycomb body.

• a) Formen einer zumindest teilweise metallischen Wabenstruktur mit zumindest teilweise durchströmbaren Hohlräumen aus mindestens einer Lage durch – Aufwickeln oder – Stapeln zu mindestens einem Stapel und anschließendes Verwinden mindestens eines Stapels; und
• b) Einführen der Wabenstruktur in ein einstückiges Mantelrohr mit zumindest drei in einer Längsrichtung liegenden Teilbereichen, wobei ein zweiter Teilbereich eines zweiten Innendurchmessers zwischen einem ersten und einem dritten Teilbereich liegt und der erste und dritte Teilbereich Innendurchmesser 'aufweisen, die kleiner als der zweite Innendurchmesser sind, unter zumindest teilweise elastischer Verformung der Wabenstruktur, so dass die Wabenstruktur im zweiten Teilbereich liegt.

According to another aspect of the inventive concept, a method for producing a honeycomb body is proposed, which comprises the following steps:

• a) forming an at least partially metallic honeycomb structure with at least partially permeable cavities of at least one layer by - winding or - stacking to at least one stack and then twisting at least one stack; and
• b) inserting the honeycomb structure into a one-piece jacket tube having at least three subregions lying in a longitudinal direction, wherein a second subregion of a second inner diameter lies between a first and a third subregion and the first and third subregions have inner diameters which are smaller than the second inner diameter , under at least partially elastic deformation of the honeycomb structure, so that the honeycomb structure lies in the second partial area.

The inventive method allows advantageously the formation of a honeycomb body, in the honeycomb structure only by force and / or positive engagement with is connected to the jacket tube. In particular, by means of the method according to the invention produced a honeycomb body according to the invention become.

• a) Aufwickeln mindestens einer zumindest teilweise strukturierten Lage;
• b) Aufwickeln mindestens einer zumindest teilweise strukturierten und mindestens einer im wesentlichen glatten Lage;
• c) Stapeln einer Mehrzahl von zumindest teilweise strukturierten Lagen zu mindestens einem Stapel und Verwinden mindestens eines Stapels; oder
• d) Stapeln einer Mehrzahl von zumindest teilweise strukturierten Lagen und im wesentlichen glatter Lagen zu mindestens einem Stapel und Verwinden mindestens eines Stapels.

According to an advantageous embodiment of the method according to the invention, the honeycomb structure is discharged by one of the following methods forms:

• a) winding at least one at least partially structured layer;
• b) winding at least one at least partially structured and at least one substantially smooth layer;
• c) stacking a plurality of at least partially structured layers into at least one stack and twisting at least one stack; or
• d) stacking a plurality of at least partially structured layers and substantially smooth layers to at least one stack and twisting at least one stack.

• a) Kraftschluss oder
• b) Formschluss.

According to a further advantageous embodiment of the method according to the invention, the at least one layer is connected in contact areas with itself or with another layer in at least one of the following ways:

• a) adhesion or
• b) positive locking.

Under Contact areas are in particular the areas to be understood with which one location with areas of an adjacent location or with itself in touch stands. When forming a honeycomb structure, for example, smooth and corrugated sheets would the contact areas exist in the areas with which a wave crest a corrugated sheet touches an adjacent smooth sheet metal.

According to one further advantageous embodiment the method according to the invention the honeycomb structure comprises at least one sheet metal layer, in particular a thickness of less than 250 microns (Microns), preferably less than 150 microns, more preferably less as 60 μm.

According to one further advantageous embodiment the method according to the invention At least one of the beads is designed obliquely in the longitudinal direction.

So can be formed advantageously in a cone, the Introduce the honeycomb structure in the casing tube which is at least partially elastic Promotes deformation of the honeycomb structure and / or allows.

According to one further advantageous embodiment the method according to the invention the second portion is formed by a sheet metal forming process, by the second inner diameter compared to the inner diameters of the first and third subdomains is increased.

sheet metal forming include in this context in particular drawing, pressing, bending and High pressure forming and superplastic forming processes.

According to one further advantageous embodiment the method according to the invention is the jacket tube made up of at least two layers, wherein an inner layer formed only in the first and third sub-area.

All pointed to the honeycomb body according to the invention Details and advantages are transferable to the method according to the invention and applicable and vice versa. Below are more details and advantages, and preferred embodiments with reference to the figures be explained in more detail, without the invention being limited to the exemplary embodiments shown. Show it:

1 schematically a first embodiment of a honeycomb body according to the invention in cross section;

2 schematically the first embodiment of a honeycomb body according to the invention in longitudinal section;

3 schematically a second embodiment of a honeycomb body according to the invention in longitudinal section;

4 schematically a third embodiment of an inventive honeycomb body in longitudinal section; and

5 schematically a possible for all embodiments honeycomb structure in cross section.

1 schematically shows a honeycomb body according to the invention 1 in cross section. The honeycomb body 1 comprises an at least partially metallic honeycomb structure 2 and a jacket tube 3 , The honeycomb structure 2 is in the present case of at least partially structured layers 4 and substantially smooth layers 5 educated. For the sake of clarity, the at least partially structured layers 4 drawn only in a section of the cross section. The at least partially structured layers 4 and the substantially smooth layers 5 are to three stacks 6 stacked and then wound together. The layers 4 . 5 form for a fluid at least partially permeable cavities 7 which form channels in the present embodiment, in a longitudinal direction 8th the honeycomb structure 2 for a fluid, in particular an exhaust gas, are at least partially flowed through. Other honeycomb structures, in particular a spiral or S-shaped honeycomb structure, in which a stack is twisted in opposite directions by two fixed points, are possible and erfindungs according to. As layers 4 . 5 can all the above mentioned layers 4 . 5 be used in any combination, in particular sheet metal layers and fiber mats. At least a portion of the layers are sheet metal layers having a thickness of less than 250 microns (microns), preferably less than 150 microns, more preferably less than 60 microns

2 shows the first embodiment of the honeycomb body according to the invention 1 in a longitudinal section. Longitudinal 8th has the jacket tube 3 a first subarea 9 , a second subarea 10 and a third subarea 11 on. The first section 9 has a first inner diameter 12 , the second subarea 10 a second inner diameter 13 and the third part 11 a third inner diameter 14 on. The first 9 and the third part 11 are formed by beads, which from the outside into the jacket tube 3 are pressed. The first 12 and third inner diameter 14 are smaller than the second inner diameter 13 so that the honeycomb structure 2 solely by a force and / or positive connection, in particular by the beads 9 . 11 longitudinal 8th is fixed.

The first section 9 forming bead is with a tapered area 15 educated. This beveled area 15 creates a three-dimensional cousin. When making the honeycomb body 1 becomes a honeycomb structure 2 , which in the unbiased state have a diameter 16 which is greater than or equal to the second inner diameter 12 is, with a first end 17 longitudinal 8th in the jacket tube 3 introduced. Through the tapered portion forming a cone 15 becomes the diameter 16 the honeycomb structure 2 at least partially elastic up to the first inner diameter 12 decreases around then, after a second end 18 the first part 9 has happened, due to a restoring force on the second inner diameter 13 too fast. As is the third section 11 a third inner diameter 14 which is smaller than the second inner diameter 13 is, is the honeycomb structure 2 positive and / or positive fit between the first portion 9 and the third section 11 especially in the longitudinal direction 8th fixed.

3 schematically shows a longitudinal section through a second embodiment of a honeycomb body according to the invention 1 comprising a honeycomb structure 2 and a jacket tube 3 , Compared to the first embodiment, only the differences are to be listed here and in the following figures. The jacket tube also has three sections 9 . 10 . 11 on, with the second subarea 10 one compared to the first 12 and third inside diameters 14 enlarged second inner diameter 13 having. This second section 10 is made by a sheet metal forming process, in particular a pressing or drawing process, from a sheet, from which also the first 9 and third subarea 11 be formed. The jacket tube thus obtained 3 is thus one-layered and one-piece.

4 schematically shows a longitudinal section through a third embodiment of a honeycomb body according to the invention, in which the casing tube 3 is formed in two layers. The jacket tube 3 includes an inner layer 19 and an outer layer 20 , The first 9 and third subarea 11 be through the inner layer 19 formed during the second subarea 10 only through the outer layer 20 is formed. Inner 19 and outer layer 20 overlay in overlay areas 21 , in which a technical joining or cohesive connection between the layers 19 . 20 is trained. Preference is given here to the formation of welding and / or solder joints between the layers 19 . 20 in the overlay area 21 , As a result, the second subarea points 10 a second inner diameter 13 on, which is larger than the first inner diameter 12 of the first subarea 9 and the third inner diameter 14 of the third subarea 11 , As a result, the correspondingly formed honeycomb structure 2 non-positive and / or positive, especially in the longitudinal direction 8th of the jacket tube 3 fixed. Also the jacket pipe 3 of the third embodiment is integral, that is, the honeycomb structure 2 was in the multilayer casing 3 used. This was not after insertion of the honeycomb structure 2 composed of several parts. The cohesive joining of several parts after insertion of the honeycomb structure 2 is regular on the honeycomb body 1 as there are deformations and effects on the honeycomb structure in both welding and soldering processes 2 comes.

5 schematically shows a honeycomb structure 2 in cross-section, in all honeycomb body according to the invention 1 can be trained. The honeycomb structure 2 consists of a stack 6 which is around two fixed points 22 was wound so that essentially smooth layers 5 the honeycomb structure 2 have a course that is reminiscent of an S. Such an S-shaped honeycomb structure 2 has the advantage that the individual layers do not move against each other under thermal stress, in particular such a honeycomb structure telescopes 2 Not. Hence, for such a honeycomb structure 2 the formation of a purely positive and / or positive connection between the layers 4 . 5 particularly preferred.

General are the layers 4 . 5 the honeycomb structure according to the invention 2 preferably pure non-positively and / or positively connected with each other, wherein a joining technical connection of the layers is equally possible and according to the invention. The choice of connection method is in Abhän from the honeycomb body 2 requirements to be made, in particular taking into account the winding or winding shape of the honeycomb structure 2 ,

The honeycomb body according to the invention 1 , as well as the inventive method for producing a honeycomb body 1 allow easy and cost effective formation of connections between honeycomb structure 2 and casing pipe 3 for example, by way of force and / or positive connection. The different inner diameter 12 . 13 . 14 effectively prevent movement of the honeycomb structure 2 in the jacket tube 3 in the longitudinal direction, without a cohesive connection between the jacket tube 3 and honeycomb structure 2 must be trained.

1

honeycombs

2

honeycomb structure

3

casing pipe

4

at least partially structured location

5

in the essential smooth location

6

stack

7

cavity

8th

longitudinal direction

9

first subregion

10

second subregion

11

third subregion

12

first Inner diameter

13

second Inner diameter

14

third Inner diameter

15

bevelled area

16

diameter honeycomb structure

17

first End of the honeycomb structure

18

second End of the honeycomb structure

19

inner layer

20

outer layer

21

Overlay area

22

fixed point

Claims (19)

Honeycomb body ( 1 ), in particular catalyst carrier body, comprising an at least partially metallic honeycomb structure ( 2 ) in a longitudinal direction ( 8th ) at least partially permeable cavities ( 7 ) in a jacket tube ( 3 ), characterized in that the jacket tube ( 3 ) longitudinal ( 8th ) at least three subareas ( 9 . 10 . 11 ) each having an inner diameter ( 12 . 13 . 14 ), wherein a second subregion ( 10 ) having a second inner diameter ( 13 ) longitudinal ( 8th ) between a first ( 9 ) and a third subregion ( 11 ) whose inner diameter ( 12 . 14 ) smaller than the second inner diameter ( 13 ) are. Honeycomb body ( 1 ) comprising an at least partially metallic honeycomb structure ( 2 ) in a longitudinal direction ( 8th ) at least partially permeable cavities ( 7 ), characterized in that the honeycomb structure ( 2 ) with the jacket tube ( 3 ) is connected in at least one of the following ways: a) adhesion or b) positive connection. Honeycomb body ( 1 ) according to one of the preceding claims, characterized in that the honeycomb structure ( 2 ) is produced by one of the following processes: a) winding at least one at least partially structured layer ( 4 ); b) winding up at least one at least partially structured ( 4 ) and at least one substantially smooth layer ( 5 ); c) stacking a plurality of at least partially structured layers ( 4 ) to at least one stack ( 6 ) and twisting at least one stack ( 6 ); or d) stacking a plurality of at least partially structured layers ( 4 ) and substantially smooth layers ( 5 ) to at least one stack ( 6 ) and twisting at least one stack ( 6 ). Honeycomb body ( 1 ) according to claim 3, characterized in that the at least one layer ( 4 . 5 ) in areas of contact with themselves or with another situation ( 4 . 5 ) is connected in at least one of the following ways: a) adhesion or b) positive connection. Honeycomb body ( 1 ) according to claim 3 or 4, characterized in that the honeycomb structure ( 2 ) at least one sheet metal layer ( 4 . 5 ), in particular a thickness of less than 250 microns (microns), preferably less than 150 microns, more preferably less than 60 microns. Honeycomb body ( 1 ) according to one of the preceding claims, characterized in that the first ( 9 ) and third subarea ( 11 ) are formed by beads. Honeycomb body ( 1 ) according to claim 6 , characterized in that at least one of the beads in a longitudinal direction ( 8th ) of the honeycomb body ( 1 ) is bevelled. Honeycomb body ( 1 ) according to one of the preceding claims, characterized in that the jacket tube ( 3 ) is formed in one layer. Honeycomb body ( 1 ) according to one of claims 1 to 7, characterized in that the jacket tube ( 3 ) is multilayered, in particular two-layered, wherein at least one inner layer ( 19 ) only in the first ( 9 ) and third subarea ( 11 ) it is. Honeycomb body ( 1 ) according to one of the preceding claims, characterized in that the jacket tube ( 3 ) is integrally formed. Honeycomb body ( 1 ) according to one of the preceding claims, characterized in that the first ( 9 ) and / or third subregion ( 11 ) the honeycomb structure ( 2 ) in at least one of the following ways: a) non-positively or b) positive fit. Method for producing a honeycomb body ( 1 ), comprising the following steps: a) forming an at least partially metallic honeycomb structure ( 2 ) with at least partially permeable cavities ( 8th ) from at least one layer ( 4 . 5 ) by - winding or - stacking to at least one stack ( 6 ) and then twisting at least one stack ( 6 ); and b) inserting the honeycomb structure ( 2 ) in a one-piece jacket tube ( 3 ) with at least three in a longitudinal direction ( 8th ) ( 9 . 10 . 11 ), with a second subrange ( 10 ) of a second inner diameter ( 13 ) between a first ( 9 ) and a third subregion ( 11 ) and the first ( 9 ) and third subarea ( 11 ) Inside diameter ( 12 . 14 ) smaller than the second inner diameter ( 13 ) are under at least partially elastic deformation of the honeycomb structure ( 2 ), so that the honeycomb structure ( 2 ) in the second subarea ( 10 ) lies. Method according to claim 12, characterized in that the honeycomb structure ( 2 ) is formed by one of the following methods: a) winding at least one at least partially structured layer ( 4 ); b) winding up at least one at least partially structured ( 4 ) and at least one substantially smooth layer ( 5 ); c) stacking a plurality of at least partially structured layers ( 4 ) to at least one stack ( 6 ) and twisting at least one stack ( 6 ); or d) stacking a plurality of at least partially structured layers ( 4 ) and substantially smooth layers ( 5 ) to at least one stack ( 6 ) and twisting at least one stack ( 6 ). Method according to claim 13, characterized in that the at least one layer ( 4 . 5 ) in areas of contact with themselves or with another situation ( 4 . 5 ) is connected in at least one of the following ways: a) adhesion or b) positive engagement. Method according to one of claims 12 to 14, characterized in that the honeycomb structure ( 2 ) at least one sheet metal layer ( 4 . 5 ), in particular a thickness of less than 250 microns (microns), preferably less than 150 microns, more preferably less than 60 microns. Method according to one of claims 12 to 15, characterized in that the first ( 9 ) and third subarea ( 11 ) are formed as beads. A method according to claim 16, characterized in that at least one of the beads in the longitudinal direction ( 8th ) is executed beveled. Method according to one of claims 12 to 15, characterized in that the second subregion ( 10 ) is formed by a sheet metal forming process, through which the second inner diameter ( 13 ) compared to the inner diameters ( 13 ) of the first ( 9 ) and third subarea ( 11 ) is increased. Method according to one of claims 12 to 15, characterized in that the jacket tube ( 3 ) of at least two layers ( 19 . 20 ), wherein an inner layer ( 19 ) only in the first ( 9 ) and third subarea ( 11 ) is trained.