DE10314084A1 - Production of metallic layer, used e.g. as catalyst support body, comprises forming structures in longitudinal direction so that both regions have parallel upper and/or lower support surfaces in longitudinal direction - Google Patents

Abstract

The production of a metallic layer comprises forming structures in the longitudinal direction so that both regions have parallel upper and/or lower support surfaces in the longitudinal direction in the region of the peaks and/or troughs independent of the material thicknesses. The metallic layer (8) has corrugation troughs (11) and corrugation peaks (10) in partial regions with an upper support surface (17) made from the corrugation peaks and a lower support surface (22) made from the corrugation troughs. The metallic layer has a first region (2) with a first material thickness (D1) and a second region (3) with a second material thickness (D2) which is different from the first material thickness. Independent claims are also included for the following: (1) a metallic layer produced by the above process; and (2) a honeycomb body partially made from the metallic layer.

Description

The The invention relates to a structured metallic layer, the areas has different material thicknesses, a method for manufacturing such metallic layers, and a honeycomb body, at least partially is built up from such metallic layers.

Honeycomb bodies are widely used, for example as a catalyst carrier body for converting exhaust gases from internal combustion engines, as an exhaust gas filter for filtering out particles in the exhaust gas stream from internal combustion engines or the like. Such honeycomb bodies are, for example, from the EP 0 245 737 B1 or the EP 0 430 945 B1 known. However, the invention can also be used in other designs, e.g. B. spirally wound designs. Conical designs in one direction are also known, for example from WO 99/56010. The manufacturing processes known for honeycomb bodies can also be used for the present invention. Recent developments in cell geometry have resulted in the use of microstructures in the channel walls, as are known, for example, from WO 90/08249 and WO 99/31362. Such honeycomb bodies are generally produced at least from an at least partially structured metallic layer or a plurality of at least partially structured and essentially smooth metallic layers and often have cavities through which a fluid can flow, which can also be designed as a channel system.

Metallic Can lay For example, be sheet metal layers or at least partially from one at least in part for a fluid permeable Material be formed.

to Production of a honeycomb body are differently structured metallic layers or alternately essentially smooth and at least partially structured metallic Layers stacked and / or wound into a honeycomb structure. Using of sheet metal layers, these typically have thicknesses of less than 0.08 mm, especially less than 0.04 mm or even less than 0.025 mm. The honeycomb structure is placed in a tubular casing. With a thermal joining process the metallic layers of the honeycomb structure with one another and the honeycomb structure connected to the casing tube. Soldering processes are often used here Application. There are several ways to plumb the towards connecting areas of the metallic layers to be applied under this can be done by applying an adhesive to the corresponding areas of the metallic layers, which are then made with powdered solder provided that adheres to the adhesive. When heating the Structures evaporated the adhesive, a solder joint arises in the desired Areas. When applying the adhesive and / or the solder can arise from the stacking of sheet metal layers Capillary action in narrow gaps can be exploited. Others too thermal joining processes, such as the formation of diffusion bonds are applicable.

In honeycomb bodies, the problem arises with some designs that the metallic layers from which the honeycomb bodies are produced have regions with different material thicknesses. For example, from the EP 0 855 936 B1 a honeycomb body constructed from sheet metal layers is known, which has reinforcing structures which can consist, for example, of folds of the edges in the end region of the honeycomb body. By folding the sheet metal layers in the forehead area there are areas that have a significantly increased material thickness compared to the rest of the sheet metal layers.

This Folds lead to the formation of voids at their limits those when coating the sheet layers, for example with a washcoat this sets itself apart. In the case of using the honeycomb body as The washcoat contains the catalyst carrier body including the precious metal catalyst. That is, by filling the cavities with washcoat none for the exhaust gas can flow catalytically active surface, however, the consumption of washcoat and precious metal catalysts is increasing. This increases the manufacturing cost of the catalyst carrier body.

often become honeycomb bodies pre-stressed in a jacket pipe. Become sheet metal layers or metallic layers with folded ends are used, so these can not evenly biased because a pretension forms at the axial edge, but not in the middle of the metallic layers. This works diffusion soldering and other connection techniques negatively on the connection of the metallic layers.

Correspondingly designed honeycomb bodies are also used as particle filters. In the case of these particle filters, at least some of the metallic layers can be formed at least partially from a porous material, for example a fiber material. When connecting these filter layers with z. B. sheet metal layers for reinforcement, especially in the edge region of the filter layers, a metallic layer is also produced here, which has regions of different material thickness and which have the above-mentioned disadvantages in relation to the construction of a honeycomb body on the bias and the distribution of adhesive or solder material.

Of these, starting from it is an object of the invention, at least partially To propose structures having a metallic layer, the ones set out above Avoiding problems helps, as well as a process for making one such a metallic layer and a honeycomb body, which is at least partially is constructed from at least one such metallic layer.

This Task is solved by a method with the features of claim 1, a sheet metal layer with the features of claim 12 and a honeycomb body the features of claim 24. Advantageous further developments are Subject of each dependent Expectations.

at the inventive method for producing structures with wave valleys and at least in some areas Metallic layer with wave crests with at least one upper contact surface and partially formed from the wave crests an at least partially formed from the troughs lower contact surface, the at least a first area with a first material thickness and a second area with a different from the first material thickness has a second material thickness, the structures are formed longitudinal so that regardless of the respective material thickness both areas in the longitudinal direction in Area of the wave crests and / or the wave troughs essentially aligned upper and / or lower contact surfaces exhibit.

A Metallic layer produced by the process has in the areas in which when winding a honeycomb body with neighboring metallic Layers lie against each other, an aligned, in particular continuous upper and / or lower contact surface on. Here, the upper contact surface is at least partially from the outer surface of the wave crests and the lower contact surface at least partially from the outer surface of the troughs educated. When building a honeycomb body by an alternating one Stack of smooth and corrugated sheet metal layers touch Adjacent metallic layers essentially in the area of the contact surfaces, whereby the smooth metallic layers on the outer surfaces of the troughs and Mountains of waves. One in the area of the wave crests and / or the troughs longitudinal aligned contact surface without steps is achieved in that the wave crests in both Areas with different material thicknesses essentially each have the same external height and / or the wave valleys both areas with different material thicknesses in each essentially the same outer depth exhibit.

This allowed independently of the material thickness in the two areas a uniform contact surface adjacent metallic layer, so for example when soldering an even distribution of solder or adhesive by known methods is achieved by not interrupting the capillary action impaired becomes. The formation of evenly formed diffusion connections is possible.

According to one The advantageous embodiment of the method is the area with the smaller material thickness at least partially structured during the other area is essentially smooth.

This advantageously allows the formation of metallic Layers in the area of the wave crests and / or the wave troughs in the longitudinal direction continuous contact surfaces, because the difference in thickness between the area with the greater material thickness and the area with the smaller material thickness by the formation compensated for by structures in the area with the smaller material thickness can be.

According to one The first region has an advantageous embodiment of the method and the second area structures. This enables, for example, construction of structured sheet metal layers with folds in the area of Wave crests and / or the wave valleys have aligned, in particular continuous, contact surfaces.

According to one Another advantageous embodiment of the method is at least one of the regions made of a material through which a fluid can flow at least partially, preferably a metallic fiber material. The training of metallic layers at least partially from at least partially for a fluid durchströmbarem Material advantageously allows the construction of open ones Particulate filters.

A particle filter is said to be open if it can basically be traversed completely by particles, including particles that are considerably larger than the particles that are actually to be filtered out. As a result, such a filter cannot become blocked even during agglomeration of particles during operation. A suitable method for measuring the openness of a particle filter is, for example, testing the diameter up to which spherical particles can still flow through such a filter. In the present application, a filter is particularly preferred when balls with a diameter greater than or equal to 0.1 mm can still trickle through wise balls with a diameter above 0.2 mm.

According to one another advantageous embodiment of the method Forming the structures at least partially by embossing. Especially In this context, it is advantageous that the formation of the structures through waves and subsequent Shape he follows. In this way, for example, waves of metallic Location take place in both areas, then in the area that the thinner Has material thickness, an adjustment of the outer height of the wave crests and / or the outer depth the wave valleys by embossing he follows.

This allows the formation of one in the area of the wave crests and / or the wave troughs in the longitudinal direction continuous upper and / or lower contact surface.

According to one another advantageous embodiment of the method Forming the structures by stepped waves.

stepped Waves allow it to easily structure into metallic structures Able to bring in that this one in the area of the wave crests and / or the wave valleys have essentially continuous upper and / or lower contact surface. For example, in sheet metal layers with folds in at least guaranteed one of the end areas be that one in the area of the wave crests and / or the wave troughs in the longitudinal direction essentially continuous contact surface is formed.

According to one further advantageous embodiment of the method are by the waves formed sine, square and / or triangular waves. In particular, it is possible due to different cell shapes in different areas compensate.

This Corrugated shapes advantageously allow metallic layers train from which a variety of different honeycomb bodies with different cell shapes and / or densities can be built can.

method according to one of the preceding claims, characterized in that the first area and the second area overlap each other at least partially overlap. In this context, it is preferred that the first region and the second area in the overlap area joining techniques are connected to each other, preferably by thermal joining processes, especially welding and / or soldering, and / or mechanical joining processes, especially rivets.

This allows advantageously connecting the two areas when these not only have different material thicknesses, but also additionally consist of different materials. For example it is so easily possible a fiber material as the first area with a sheet metal foil as the second Connect area.

For example it is possible according to the invention, one Fiber mat made of a material which is at least partially permeable to a fluid with a sheet metal foil by a thermal joining process to a metallic Able to connect. This can be done, for example, by training a Solder connection or a welded connection. Such a mechanical joining methods can also be advantageously combined with a thermal joining process so that the two areas are both thermal, as well as connected by a mechanical joining process.

According to one Another aspect of the invention proposes a metallic layer, which has structures with wave crests and wave valleys, at least in some areas, in particular for the construction of a honeycomb body, the wave crests at least partly an upper contact surface and the wave valleys at least partially form a lower contact surface and the sheet metal layer at least a first region with a first material thickness and a second area with a different from the first material thickness second material thickness. In the metallic according to the invention The structures are designed to be independent of the respective material thickness, both areas in the area of the wave crests and / or the wave valleys in longitudinal direction essentially we have continuous upper contact surfaces and / or lower contact surfaces.

A metallic according to the invention Location advantageously shows in the longitudinal direction in the area of Wave crests and / or the wave valleys essentially continuous contact surfaces, so that when building a honeycomb body at least partially from such metallic layers a uniform contact surface to neighboring metallic layers is reached. This enables a connection between neighboring ones metallic layers, for example by soldering, the connection points being formed uniformly are. In addition, the formation of a honeycomb body is evenly pretensioned possible.

According to an advantageous embodiment of the metallic layer, the area with the smaller one Material thickness at least partially structured, while the other area is essentially smooth.

hereby can advantageously structuring in the thinner area the metallic layer to compensate for the difference in thickness thicker, essentially unstructured area can be used.

According to one have a further advantageous embodiment of the metallic layer the first area and the second area structures. To this Way can structured metallic layers with areas different Thickness are formed.

According to one Another advantageous embodiment of the metallic layer is Sheet metal layer folded over in at least one end area.

A such folding can advantageously be used to reinforce the serve metallic layer. The formation of a reinforcement structure especially in a front end area serves as a mechanical one Protection, for example on the gas inlet side of a honeycomb body in the Exhaust system of an internal combustion engine. Exhaust gas flows are often pulsating and also cause a high thermal load the honeycomb body, especially the gas inlet side. With a honeycomb body metallic according to the invention Laying is the formation in the area of the wave crests and / or Continuous valleys contact surfaces with neighboring sheet metal layers particularly advantageous, as it would otherwise an uneven bias across the axial length of the honeycomb body would come.

According to one Another advantageous embodiment of the metallic layer is at least one of the areas at least partially for a fluid through which Material, preferably a metallic fiber material, formed.

in this connection Is it possible, both metal fibers, especially sintered metal fibers, as well to use other fiber materials. Such fiber materials are used in particle filters to filter the exhaust gases of internal combustion engines used, for example in the filtering of soot particles in the exhaust gas of diesel engines. These fiber materials can advantageously z. B. be reinforced with metal foils. In this way, particle filters can at least be simple partly from metallic layers of fiber materials and others Manufacture sheets.

According to one another advantageous embodiment of the metallic layer overlap the first area and the second area at least partially to each other in an overlap area.

This allows advantageously connecting the two areas when these not only have different material thicknesses, but also additionally consist of different materials. For example it is so easily possible a fiber material as the first area with a sheet metal foil as the second Connect area.

According to one are a further advantageous embodiment of the metallic layer the areas in the overlap area through a thermal joining process, prefers welding, especially roller seam welding, and / or soldering connected with each other.

For example it is possible according to the invention, a Fiber mat with a sheet metal foil using a thermal joining process connect to. This can be done, for example, by forming a solder connection or a welded joint respectively. Seam welding has proven to be advantageous in this context, since there is still compression at the same time as the weld connection is formed the fiber mat is done. This can be done in the overlap area with the appropriate procedure the formation of one in the area of the wave crests and / or the wave troughs in the longitudinal direction simplify essentially continuous upper and / or lower contact surface.

According to one Another advantageous embodiment of the metallic layer are Areas in the overlap area through a mechanical joining process, preferably rivets, joined together.

On such mechanical joining process can also advantageously with a thermal joining process can be combined so that the two areas can be as well as connected by a mechanical joining process are. For example, a kind of pre-fixation can be achieved by riveting which are followed by a soldering or welding process.

According to one are a further advantageous embodiment of the metallic layer the structures at least partially shaped. Is particularly advantageous in this context that the structures are formed by waves and subsequent embossing are.

According to one Another advantageous embodiment of the metallic layer are Structures formed by stepped waves. Graduated waves advantageously allows metallic layers to be formed, those in the area of the wave crests and / or the wave valleys longitudinal have essentially continuous upper and / or lower contact surface.

According to one are a further advantageous embodiment of the metallic layer the waves sine, triangular and / or square waves. different Corrugated shapes in different areas can also be used to compensate different material thicknesses can be used.

The Formation of sine, triangular and / or square waves allowed in an advantageous manner in the construction of corresponding honeycomb bodies Variety of different cavity geometries and cell densities of the honeycomb body. The formation of square waves is special in this process advantageous because the same wave shape with identical wave amplitude and wavelength can be maintained, there is only a sudden change the zero position of the waves at the transition from first area to second area. This can be done easily realize in the design of the structuring tools.

According to one Another aspect of the inventive idea proposes a honeycomb body which is at least partially made up of metallic layers by the method according to the invention have been produced, or at least partially from metallic according to the invention Layers is built up.

All for the inventive method Advantages described apply in the same way for a metallic according to the invention Location and a honeycomb body according to the invention and vice versa.

Further Embodiments and advantages of the invention are described below closer to the drawing explained. However, the invention is not limited to the exemplary embodiments shown there limited. Show it:

1 a structured metallic layer according to the invention;

2 a honeycomb structure at least partially constructed from structured sheet metal layers according to the invention;

3 an axial section through a structured sheet metal layer according to the invention;

4 an axial section through a further embodiment of a structured sheet metal layer according to the invention; and

5 schematically shows a perspective view of a partially structured metallic layer according to the invention.

At the Structure of a honeycomb body with sheet metal layers with folds known from the prior art There are several effects on the end faces of the sheet metal layers.

First is formed if the honeycomb body is under Preload is produced, this unevenly in the axial direction. this leads to to an uneven distribution of the solder due to the axially uneven capillary action at one According to conventional Method. Also, for example, when creating diffusion connections there is also an uneven connection of the sheet layers.

Secondly it happens regularly coating these sheet layers with washcoat means that Washcoat with precious metal catalyst stored in the folds. This carries however not to enlarge the Surface, which is flown by an exhaust gas can be at. In this respect, the precious metal catalysts in the folding gaps also not to increase the effectiveness of the catalytic conversion at. Consequently, this washcoat with embedded precious metal catalysts to be regarded as a loss in the area of the folding gaps.

At least the first disadvantage generally occurs when a honeycomb body at least partly from metallic layers with areas different Thickness is built up.

These effects are overcome by using structured metallic layers according to the invention. 1 shows a structured metallic layer according to the invention 1 that have a first area 2 with a thickness D1 and two second areas 3 with a respective thickness D2. The metallic layer 1 is a sheet metal layer in this example. The second areas 3 are made by forming folds 4 a length L2 on the face of the metallic layer 1 educated. The structured metallic layer 1 has a wave-like structure with troughs 11 and wave crests 10 on. In the area of the wave valleys 11 and the wave crests 10 is structured so that there is a transition from the first area 2 to the second area 3 the structure changes so that the first area 2 and the second area 3 in a wave valley 11 each have an identical outer depth and in a wave crest 10 each have an identical external height. This leads to one in the area of the wave crests 10 longitudinal 21 continuous upper contact surface 17 which, in the present example, consist of the outer surfaces of the wave crests 10 , and one in the area of the wave valleys 11 longitudinal 21 continuous lower contact surface 22 , which in the present example are from the outer surfaces of the wave valleys 11 is formed. The upper contact surface 17 and the lower contact surface 22 are at least partially made of such metallic layers when building a honeycomb body 1 on neighboring metallic La to. A consistent contact surface 17 . 22 leads to one in the longitudinal direction 21 uniform pre-tension, which leads to an even solder distribution when brazing with conventional methods.

2 shows a honeycomb structure 6 made of smooth sheet metal layers 7 and structured metallic layers according to the invention, which are used as sheet metal layers 8th are trained, is built. The smooth sheet metal layers 7 and the structured sheet metal layers 8th are alternately stacked on top of one another, so that channels can flow through for a fluid 9 form. Each of the structured sheet metal layers according to the invention 8th has wave crests 10 and wave valleys 11 on, the wave crests 10 an upper contact surface 17 and the wave valleys 11 a lower contact surface 22 form. Longitudinal 21 shows the structured sheet metal layer 8th a first area 2 and a second area 3 that have different material thicknesses. In the construction of the honeycomb structure 6 it can be seen that the contact surface 17 . 22 between a smooth sheet metal layer 7 and a structured sheet metal layer 8th always from a wave crest 10 or a wave trough 11 consists. The smooth sheet metal layer 7 lies on the outer surface of the structured sheet metal layer 8th on the outer surface of the wave crest 10 or the wave valley 11 ,

3 shows a section through a sheet metal layer structured according to the invention 8th in a wave crest 10 , The cut is longitudinal 21 , The structured sheet metal layer can be seen 8th that have a first area 2 a thickness D1 and a second area 3 has a thickness D2. The second area 3 is by a fold 4 formed so that the thickness D2 of the second area 3 is greater than the thickness D1 of the first area 2 ,

When structuring the structured sheet metal layer 8th became a step 12 trained, for example, a graduated corrugated process applied. This stage 12 leads to a leveling of the structure. The structuring is done in the first area 2 the structure relative to the zero crossing 13 the wave a first inner height 14 while the second inner height 15 in the area of the second area 3 is less than the first inner height 14 , However, both in the first area 2 , as well as in the second area 3 the outer height 16 identical. That through the wave crest 10 the outer height 16 formed upper contact surface 17 to a possibly adjacent smooth sheet 7 is therefore infinitely variable. As a result, it happens when building a honeycomb body 6 to a flat connection of the structured sheet 8th with an adjacent smooth sheet 7 , for example by forming a solder joint. Another advantage of the sheet metal layer according to the invention is the fact that the folding gaps 5 is largely closed, so that when coating the structured sheet metal layer 8th with washcoat for a significantly reduced storage of washcoat in the folding column 5 comes.

It is also possible according to the invention to fold over 4 , the second area 3 to stabilize by means of a thermal joint connection. The second area is particularly useful here 3 in the folding column 5 to be soldered, or to provide a weld seam, which can be formed, for example, by a roller seam welding process or a laser welding process.

It is according to the invention likewise possible one mechanical joint connection or the combination of a mechanical joint connection, e.g. B. rivets, with a thermal joint connection in Form the area of the fold. Advantageously, the An initial fixation can be carried out by riveting, followed by a thermal joining process carried out becomes. So the rivet connection can be used as a kind of pre-fixation be, which is further reinforced by the formation of the thermal joint connection.

The structures of the structured sheet metal layer according to the invention 8th can also be generated by forming a pre-corrugation with subsequent embossing, so that, for example, the first area 2 is embossed to the wave crest 10 with the same outer height 16 in the first area 2 and in the second area 3 train.

4 shows a corresponding axial section in the crest 10 by a further embodiment of a metallic layer structured according to the invention 1 , The structured metallic layer 1 consists of a filter layer 18 and a tin foil 19 together. Here the filter layer forms 18 the first area 2 and the tin foil 19 the second area 3 , The filter layer 18 is a filter mat made of a material that can be at least partially flowed through by a fluid. The first area 2 has a thickness D1 while the second area 3 has a thickness D2. In this embodiment, the thickness D1 is larger than the thickness D2. This metallic layer too 1 was structured and in a wave crest 10 longitudinal 21 cut. The filter layer 18 is porous and gas can flow through it in the radial direction, for example. With respect to the zero line 13 The embossed corrugation shows the two areas 2 and 3 different inner heights 14 . 15 with respect to the zero crossing of the corrugation 13 , but a common outer height 16 on. The first area 2 and the second area 3 overlap in an overlap area 20 , In this overlap area 20 is a technical connection between the filter layer 18 and the tin foil 19 educated. This technical connection can be made, for example, by welding process, preferably a resistance welding or laser welding process can be produced. In this context, the use of a roller seam welding method is particularly advantageous, since the contact pressure during roller seam welding can be used for the filter layer 18 compress to the difference in thickness between the filter layer 18 and the tin foil 19 compensate. The result of such a roller seam welding process is a firm connection between the filter layer 18 and the tin foil 19 , Even when connecting a sheet metal foil 19 with a filter layer 18 can in the overlap area 20 in an advantageous manner, alternatively or in addition to a thermal joining connection, a mechanical joining connection is formed.

5 shows schematically a perspective view of a metallic layer according to the invention 1 , This has a first area 2 on that from a filter layer 18 is formed, for example, from a metallic fiber material. The first area 2 has a thickness D1. There is also a second area 3 from a metal foil 19 formed, the thickness D2 is significantly less than the thickness D1 of the first region 2 , First area 2 and second area 3 overlap each other in the overlap area 20 , In this are the tin foil 19 and the filter layer 18 Joined together, for example, roll seam welded. The tin foil 19 is structured in the area that is not part of the overlap area 20 is. The structure is with wave crests 10 and wave valleys 11 designed so that the distance 23 between the outer surface of the wave crests 10 and the outer surface of the wave valleys 11 corresponds exactly to the thickness D1. This leads to the formation of an upper contact surface 17 that are the top 24 the fiber layer 18 , the top of the overlap area 20 and the outer surfaces of the wave crests 10 includes. So in the area of the wave crests 10 an upper contact surface 17 trained in the longitudinal direction 21 is continuous, i.e. has no jumps. Likewise, a lower contact surface 22 formed the bottom 25 and the outer surfaces of the wave valleys 11 includes and in the longitudinal direction 21 is essentially continuous.

By forming structures with wave crests 10 and wave valleys 11 in a second area 3 can thus advantageously the difference in thickness between the thickness D2 of the fiber layer 18 and the thickness D1 of the sheet metal foil 19 be balanced. The formation of the structures in the second area 3 can be done advantageously by waves or waves and subsequent embossing. If the filter layer 18 also has structures, a stepped corrugation process for forming the structures is also possible.

The method according to the invention and the metallic layer according to the invention 1 . 8th enable the construction of honeycomb structures in an advantageous manner 6 where the metallic layers 1 . 8th despite training two areas 2 . 3 different thicknesses D1, D2 in the area of the wave crests 10 and / or the wave valleys 11 essentially continuous contact surfaces in the axial direction 17 . 22 are connected to adjacent metallic layers. This is the structure of honeycomb structures 6 at least partially from metallic layers 1 . 8th possible under essentially uniform pretension.

1

metallic location

2

first Area

3

second Area

4

Umfalzung

5

Umfalzspalte

6

honeycomb structure

7

smoothness sheet metal layer

8th

structured sheet metal layer

9

channel

10

Wellenberg

11

trough

12

step

13

Zero-crossing

14

first inner height

15

second inner height

16

outer height

17

upper contact surface

18

filter layer

19

metal sheet

20

overlap area

21

longitudinal direction

22

lower contact surface

23

distance

24

top

25

bottom

D1

thickness of the first area

D2

thickness of the second area

L2

Length of second area

Claims (24)

Method for producing structures with wave valleys (at least in some areas) 11 ) and wave crests ( 10 ) metallic layer ( 8th ) with an at least partially from the wave crests ( 10 ) formed upper contact surface ( 17 ) and one at least partially from the wave valleys ( 11 ) formed lower contact surface ( 22 ), the metallic layer ( 8th ) at least a first area ( 2 ) with a first material thickness (D1) and a second area ( 3 ) with a second material thickness (D2) different from the first material thickness (D1), characterized in that the structures are formed in the longitudinal direction in such a way that both areas (D1, D2) are independent of the respective material thickness (D1, D2) 2 . 3 ) longitudinal ( 21 ) in the Area of the wave crests ( 10 ) and / or the wave valleys ( 11 ) essentially flush upper ( 17 ) and / or lower contact surfaces ( 22 ) exhibit. A method according to claim 1, characterized in that the area ( 3 ) is at least partially structured with the smaller material thickness (D2), while the other area ( 2 ) is essentially smooth. A method according to claim 1, characterized in that the first region ( 2 ) and the second area ( 3 ) Have structures. Method according to one of the preceding claims, characterized in that at least one of the areas ( 2 ) is formed from a material that is at least partially permeable to a fluid, preferably a metallic fiber material. Method according to one of the preceding claims, characterized in that the metallic layer ( 8th ) in at least one area ( 2 . 3 ) is folded over. Method according to one of claims 1 to 5, characterized in that that the structures are formed at least in part by embossing. A method according to claim 6, characterized in that the structures are formed by waves and subsequent stamping. Method according to one of claims 1 to 5, characterized in that that the structures are formed by stepped waves. Method according to one of claims 7 or 8, characterized in that sine, rectangular and / or triangular waves are formed by the waves, in particular different shapes in the first region ( 2 ) and in the second area ( 3 ). Method according to one of the preceding claims, characterized in that the first region ( 2 ) and the second area ( 3 ) in an overlap area ( 20 ) at least partially overlap. A method according to claim 10, characterized in that the first region ( 2 ) and the second area ( 3 ) in the overlap area ( 20 ) are joined together in terms of joining technology, preferably by thermal joining processes, in particular welding and / or soldering, and / or mechanical joining processes, in particular rivets. Metallic layer that has structures with wave crests (at least in some areas) 10 ) and wave valleys ( 11 ), in particular for the construction of a honeycomb body ( 6 ), the wave crests ( 10 ) at least partially an upper contact surface ( 17 ) and the wave valleys ( 11 ) at least partially a lower contact surface ( 22 ) form and the metallic layer ( 8th ) at least a first area ( 2 ) with a first material thickness (D1) and a second area ( 3 ) with a second material thickness (D2) different from the first material thickness (D1), characterized in that the structures are designed in such a way that, regardless of the respective material thickness (D1, D2), both areas ( 2 . 3 ) in the area of the wave crests ( 10 ) and / or the wave valleys ( 11 ) longitudinal ( 21 ) essentially aligned upper contact surfaces ( 17 ) and / or lower contact surfaces ( 22 ) exhibit. Metallic layer according to claim 12, characterized in that the area ( 3 ) is at least partially structured with the smaller material thickness (D2), while the other area ( 2 ) is essentially smooth. Metallic layer according to claim 12, characterized in that the first region ( 2 ) and the second area ( 3 ) Have structures. Metallic layer according to one of claims 12 to 14, characterized in that the sheet metal layer ( 8th ) is folded over in at least one end region. Metallic layer according to one of claims 12 to 15, characterized in that at least one of the areas ( 2 . 3 ) is made of a material that can at least partially flow through for a fluid, preferably a metallic fiber material. Metallic layer according to one of claims 12 to 16, characterized in that the first region ( 2 ) and the second area ( 3 ) in an overlap area ( 20 ) at least partially overlap. Metallic layer according to claim 17, characterized in that the areas ( 2 . 3 ) in the overlap area ( 20 ) are preferably joined together by a thermal joining process, in particular welding, in particular roll seam welding, and / or soldering. Metallic layer according to claim 17 or 18, characterized in that the areas ( 2 . 3 ) in the overlap area ( 20 ) are connected to one another by a mechanical joining process, preferably rivets. Metallic layer according to one of claims 12 to 19, characterized in that the structures at least partially embossed are. Metallic layer according to claim 20, characterized in that the structures are formed by waves and subsequent embossing. Metallic layer according to one of claims 12 to 19, characterized in that the structures are graded Waves are formed. Metallic layer according to claim 21 or 22, characterized in that the waves are sine, triangular and / or rectangular waves, in particular different structures in the first region ( 2 ) and in the second area ( 3 ). Honeycomb structure, at least partially made up of metallic layers ( 8th ) which have been produced by the method according to one of Claims 1 to 11 or which consist of metallic layers ( 8th ) according to one of claims 12 to 23.