DE102008017625A1 - Exhaust system component for combustion engine of motor vehicle, has inner shell partly connected with outer shell in region of edges, where inner shell is inserted into one of edges of outer shell with its edge over circumference of edge - Google Patents

Abstract

The component has an inlet opening i.e. inlet connecting piece, and an outlet opening (4) i.e. outlet connecting piece, arranged at a housing e.g. sensor housing, for exhaust gas, where the component is made from a sheet metal material. An inner shell (10) is partly connected with an outer shell (11) in a region of two edges by a solder joint. A cutting edge has a cutting degree, which is aligned inwards at the inner shell and aligned outwards to the outer shell. The inner shell is inserted into one of the edges of the outer shell with its edge over the entire circumference of the edge. An independent claim is also included for a method for manufacturing a component of a sheet metal material for an exhaust system of a motor vehicle.

Description

The The invention relates to a manifold shell or a Other housing of an exhaust system for a Internal combustion engine, which is a so-called section of the exhaust system forms. The section consists of a sheet metal material and has a housing, at least one on the housing arranged inlet pipe and at least one on the housing arranged starting pipe on. The case is made of at least two bowls, one inner bowl with one edge and one with the Inner shell connected outer shell formed with an edge, taking the inner shell with the outer shell in the area of the two Edges connected via a solder joint is.

It is already a manifold shell in the DE 102 18 103 A1 described, which is formed of two half-shells. The two half-shells each have a flat edge, over which they are partially inserted into each other. The border is not arranged circumferentially. The two half-shells form in the region of one side of the manifold shell, in which the edge is open and they are not inserted into each other, each half an outlet nozzle. In the area of the outlet nozzle, a joint is provided on which the two half-shells lie on top of each other. Following the shock, the edge of the two shells opens increasingly and forms the outlet nozzle.

For a solder joint is a gap with a width between 0.015 mm and 0.2 mm necessary, which has a certain height, so that the solder is flat and not only spread out in a line along a butt seam can. The tolerance range of the gap can also only under the Condition to be met, that the components to be connected even exceed certain tolerances or not.

Of the Invention is based on the object, a housing for a part of an exhaust system in such a form and arrange all housing parts and those on the housing arranged flanges connected together in a soldering process can be and at the same time a cost-effective and faster manufacturing process is ensured.

Solved The object is achieved according to the invention in that the edge in a plane around the shell circumferentially formed and closed is and a cutting edge produced by a cutting process having a sectional area and a degree of cutting and the degree of cutting on the inner shell inside and on the outer shell directed to the outside, the inner shell with her Edge over the entire circumference of the edge in the edge of the outer shell is plugged in.

By Punching the sheets for the shells is opposite other cutting processes such as burning or lasers The most cost effective and fastest cutting process ensures that However, due to the inevitable when punching cutting no narrow dimensional tolerances in the cutting area possible. So that the edges, due to the cutting process a Have cut surface with a degree of cutting, soldered can be, the sheets are punched so that the cutting degrees then not arranged in the soldering gap, if the two Trays are nested. By nesting the both shells become one more necessary for soldering Gap formed whose height corresponds to the measure, with the ones in the bowls are stuck together. Because of that Rims of both shells are circumferentially closed, can the inner shell tightly soldered around the outer shell become.

The Trays are formed by deep drawing in a first step and then punched out. The punching process takes place either in a direction perpendicular to the deep drawing direction or in a direction parallel to the deep drawing direction. Depending on the punching direction It is advantageous that the cut surface in a slicing direction R at right angles to the surface of the edge or in one Plunge direction P parallel to the surface of the edge runs. By the right-angled slicing direction R is produces a degree of cutting, in the cutting direction to the cut surface followed. In the other case, the slicing direction P becomes the sheet material in the edge region first folded and then with the smallest possible distance to the edge parallel to this cut. Here is a first and for the Soldering process essential cutting degree by folding generated. The cut surface is on the degree of cutting arranged. A second degree of cutting is again in the cutting direction subsequently generated at the interface, this however, is not relevant to the soldering process. In both cases, in the right-angled and in the parallel Sliding direction, the two shells can be arranged so that the cutting degrees are arranged opposite to each other.

at In a first variant, it is advantageous that the cut surfaces the outer shell and the inner shell in the direction of travel R perpendicular to the surface of the edge. The Outer shell is facing outward and the Inner shell cut inwards in direction. Further processing the edges is therefore not necessary to get a sufficient to get the exact joint gap for soldering, because the cutting degrees do not protrude into the soldering gap. Thereby, that the punching process in a rectangular slicing direction R more complex is as the parallel pruning in deep drawing direction, the entire production process more complex.

A preferred second variant is therefore that the edges the outer shell in the direction of travel P parallel to the surface the edge and the edges of the inner shell in the direction of slipping R perpendicular to the surface of the edge. Thereby is it possible to reduce the cost and effort for to reduce the trimming of the outer shell. By the Slip direction P, the degree of cutting is always on the outside The shell produces, which is why the outer shell is so trimmed becomes. The inner shell is cut in the direction of travel R inwards, so that even with this variant, the cutting degrees not in the soldering gap are arranged and ensures a corresponding tolerance can be.

there It is advantageously provided that the edge of the inner shell and / or the edge of the outer shell as a covenant with an over a height Hb larger or smaller Diameter is formed and at the end of the collar the cut surface is arranged with the degree of cutting. By the federation becomes a defined Stop reached, at which the inner shell in the direction in which she is plugged into the outer shell, strikes. By the stop or the federal government is in turn the height of Soldering gap defines, through which the solder is planar can spread.

in the Connection with the training according to the invention and arrangement, it is advantageous that the edge of the inner shell in the area of the cut surface inwards and / or the edge the outer shell in the area of the cut surface bent over on the outside. This will both bowls with collar as well as in shells without covenant reaches that distance from the cutting degree a shell is enlarged to the other shell.

Especially It is also advantageous that the two shells a manifold shell form. Manifold shells are so far in practice due the missing dimensional tolerances are not soldered.

Further it is advantageous that an outlet opening designed as an outlet nozzle on the outer shell and several trained as an inlet nozzle Entrance openings are provided on the inner shell, wherein the outlet nozzle with an outlet flange and the inlet nozzle connected in each case with an inlet flange gas-tight are. The inlet opening and the outlet opening are not arranged according to the invention in the edge region.

there It is advantageous that the connection between the outlet nozzle and the outlet flange and the connection between the inlet ports and the input flange is designed as a solder joint. This allows the entire manifold assembly in a soldering process.

Furthermore It is advantageous that additional in the manifold shell the exhaust gas conducting manifold pipes are arranged. The inventive Namely type of housing can also be then solder in a manufacturing process, if in the individual Entrance openings arranged in addition manifold pipes are, about the engine side manifold flanges led directly into the outlet opening of the housing become.

After all it is advantageous that the section as muffler housing, Catalyst housing or designed as a sensor housing is. The housing according to the invention is Also advantageous for such applications, because of the manufacturing effort through the soldering is reduced. In addition, that is Soldering advantageous because no impurities or weld residues get into the exhaust system.

Advantageous is the use of a prescribed section for Production of an exhaust system for internal combustion engines.

Also is a system of advantage that consists of a section and an adjoining exhaust system exists.

• a) Tiefziehen der Innenschale und der Außenschale mit Eingangsöffnung und Ausgangsöffnung;
• b) Stanzen der Innenschale und der Außenschale zum Herstellen der Ränder mit i. einer Beschnittrichtung R rechtwinklig zur Oberfläche des Randes und rechtwinklig zur Tiefziehrichtung T und/oder ii. einer Beschnittrichtung P parallel zur Oberfläche des Randes und parallel zur Tiefziehrichtung T;
• c) Einstecken der Innenschale in die Außenschale, sodass die Ränder parallel nebeneinander angeordnet sind;
• d) Positionieren eines Ausgangsflansches an der Ausgangsöffnung und jeweils eines Eingangsflansches an jeweils einer Eingangsöffnung;
• e) Einbringen eines Lots in den jeweiligen Spalt zur Herstellung der Verbindung zwischen der Innenschale und der Außenschale sowie der Verbindungen zwischen der Innenschale und der Außenschale und den jeweiligen Flanschen durch Erhitzen des Teilstücks mit den Flanschen.

The core of the invention is a method for producing such a housing from a sheet material as a section for an exhaust system of a motor vehicle. The method is characterized by at least the following method steps:

• a) deep drawing of the inner shell and the outer shell with inlet opening and outlet opening;
• b) punching the inner shell and the outer shell to produce the edges with i. a slicing direction R perpendicular to the surface of the edge and at right angles to the deep drawing direction T and / or ii. a slicing direction P parallel to the surface of the edge and parallel to the deep drawing direction T;
• c) inserting the inner shell in the outer shell, so that the edges are arranged side by side in parallel;
• d) positioning an output flange at the output port and one input flange at each input port;
• e) introducing a solder in the respective gap for establishing the connection between the inner shell and the outer shell and the connections between the inner shell and the outer shell and the respective flanges by heating the portion with the flanges.

In this method, it is advantageous in the context of exhaust systems that all connections can be made in a soldering or heating process, even if before the Inei nanderstecken the two shells separate manifold pipes are arranged in the shells.

This Method can not be used only for housing apply parts of an exhaust system, but also for other housings used in pneumatic or hydraulic Plants are used, such as pressure vessels, Boiler and container.

Further Advantages and details of the invention are in the claims and explained in the description and illustrated in the figures. It shows:

1 a side view of a manifold with a view of the arranged on the inner shell inlet pipes and the input flanges;

2 a side view of the manifold according to 1 with a view to the outlet tube and outlet flange located on the outer shell;

3 an exploded view of a manifold according to 1 and 2 ;

4 a sectional view A-A 'of the housing according to 1 consisting of an upper shell and a lower shell inserted in the upper shell;

5a a trimming edge having a sectional area and a cutting degree in a rectangular slicing direction R;

5b a trimming edge having a sectional area and a cutting degree in a parallel trimming direction P;

6 a schematic diagram of the arrangement of a manifold consisting of a housing in an exhaust system;

7 a section of the edge region of the assembled upper and lower shells according to the prior art with equally oriented cutting degrees;

8th a section of the edge region of the assembled upper and lower shells with not identically oriented cutting degrees with different Beschnittrichtung;

9 a section of the edge region of the assembled upper and lower shells with not identically oriented cutting degrees with the same cutting direction;

10 a section of the edge region of the assembled upper and lower shells with not identically oriented cutting degrees and partially bent edge.

1 and 2 show a manifold 8th consisting of a housing 1 and on the housing 1 arranged flanges 6 . 7 , The housing 1 has an inner shell 10 and an outer shell 11 on. On the outer shell 11 is one as outlet nozzle 4 trained exit opening and on the inner shell 10 are several as inlet nozzle 3 designed entrance openings provided. The outlet neck 4 is with a starting flange 6 connected to the outlet nozzle 4 surrounds and in which several holes 61 for fixing and sealing the flange to one at the manifold 8th subsequent exhaust system 2 are provided. Such an exhaust system 2 points as in 6 shown several exhaust pipes 23 on top of that, a silencer 22 , a catalyst 24 and depending on the type of use of the exhaust system 2 a filter element 21 connected to each other.

The inlet neck 3 are from a comb-shaped inlet flange 7 with several holes 71 Surrounded by each individual entry port 3 can be connected to an internal combustion engine. Both the output and the input flange 6 . 7 are gas-tight with the respective nozzle via a solder joint 3 . 4 connected.

As in 3 shown is the inner shell 10 produced by a molding of sheet metal by deep drawing, to which the inlet nozzle 3 are formed. The outer shell is also corresponding 11 a deep-drawn sheet metal part to which the outlet nozzle 4 is formed.

In 4 is a sectional view of the housing 1 of the elbow 8th according to 1 shown. The inner shell 10 is with her edge 101 in an edge 111 the outer shell 11 plugged in. As in 1 clarifies the edge surrounds 111 the outer shell 11 the edge 101 the inner shell 10 over the entire circumference of the inner shell 10 , So that the inner shell 10 clearly to the outer shell 11 can be positioned, forms the edge 111 the outer shell 11 a collar with a height Hb. The collar has a larger circumference than the adjoining the collar housing part of the outer shell 11 , The inner shell 10 can thus maximally by the amount of height Hb of the covenant in the outer shell 11 be plugged in.

Between the edge 101 the inner shell 10 and the edge 111 the outer shell 11 is a gap 5 formed according to the edges 101 . 111 in a plane around the case 1 circulates.

After deep-drawing the bowls 10 . 11 in a deep drawing direction T become the shells 10 . 11 on the edges 101 . 111 punched out, resulting in a in 5a and 5b closer edge shown 102 . 112 forms, which is designed differently depending on the Beschnittrichtung.

For example, when punching an inner shell 10 in a direction of travel R perpendicular to a surface 12 of the sheet material in the edge region has the trim edge 102 as in 5a represented a cut surface 103 and one to the cut surface 103 subsequent cutting degree 104 on. A degree of cutting 104 . 114 is perpendicular to the surface 12 arranged the sheet material in the edge region. For clarity, the degree of cutting 104 shown disproportionately large.

Will a bowl 10 . 11 such as an outer shell 11 in a direction of travel P parallel to the surface 12 the edges 111 punched, it will be like in 5b represented the sheet material in the edge region first bent and then with the least possible distance to the edge 101 . 111 cut parallel to this. As a result, by bending a first degree of cutting 114 formed perpendicular to the surface 12 of the edge 111 is arranged. The degree of cutting produced by cutting 114 ' runs parallel to the surface 12 of the sheet material in the edge area.

In the gap 5 is used to connect the inner shell 10 with the outer shell 11 Solder introduced. For this, the gap must 5 have a certain degree of tolerance. Preferably, the gap 5 a width between 0.01 mm and 0.2 mm.

According to the prior art according to 7 Both shells 10 . 11 , the inner shell 10 and outer shell 11 , punched in the cutting direction P, so that the degree of cutting 104 the inner shell 10 in the gap 5 is arranged. By the degree of cutting 104 is the dimensional tolerance for the gap 5 do not comply, which is why the two shells 10 . 11 be welded together via a weld S. Another reason that the case halves were not soldered according to the prior art, is that as the input port 3 formed entrance opening half of the inner shell le 10 and half of the outer shell 11 is formed. The shock of the two shells 10 . 11 can not like the collar described above on the edge 111 survive, because the inlet nozzle 3 otherwise not to the input flange 7 could be soldered.

In 8th to 10 are several combinations of shells according to the invention 10 . 11 represented, in which the problem of gap tolerance is avoided by the fact that the cutting degrees 104 . 114 from inner shell 10 and outer shell 11 are aligned opposite to each other.

According to 8th is the inner shell 10 in the direction of travel R and the outer shell 11 punched in the direction of travel P. The degree of cutting 114 has punching processes with a Beschnittrichtung P always outwards, so that according to the invention for the inner shell 10 this cutting process is not applied. Preference is therefore given according to 8th the combination of an inner shell 10 with direction of cut R, at which the degree of cutting 104 . 114 directed inward, with an outer shell 11 with trimming direction P. In this procedure, neither the inner shell 10 still the outer shell 11 be further processed to the necessary for soldering gap 5 to reach.

According to 9 are the inner shell 10 and the outer shell 11 both manufactured with slit R, with the inner shell 10 the cutting process to the inside and the outer shell 11 the cutting process was directed outwards, so the degree of cutting 104 the inner shell 10 inside and the degree of cutting 114 the outer shell 11 opposite to the degree of cutting 104 directed to the outside. Even after this procedure, with which the housing 1 according to 9 was prepared, no further process step is necessary to achieve the required gap tolerance.

In the embodiment according to 10 were compared to the embodiment according to 9 in a further process step additionally the edges 101 . 111 bent opposite to each other.

1

casing

10

Inner shell, Shell, manifold shell

101

edge

102

Beschnittkante

103

section

104

cutting degree

11

Outer shell Bowl

111

edge

112

Beschnittkante

113

section

114

cutting degree

114 '

cutting degree

12

surface

2

exhaust system

21

filter element

22

silencer

23

exhaust pipes

24

catalyst

3

Inlet pipe, opening, neck

4

Outlet pipe, opening, neck

5

lot, gap

6

output flange

61

drilling

7

inlet flange

71

drilling

8th

elbow

hb

height Federation

P

Beschnittrichtung

R

Beschnittrichtung

S

Weld

R

Thermoforming direction

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• DE 10218103 A1 [0002]

Claims (16)

Piece of sheet material for an exhaust system ( 2 ) of an internal combustion engine, wherein the portion of a housing ( 1 ), at least one on the housing ( 1 ) arranged inlet opening ( 3 ) for exhaust gas and at least one on the housing ( 1 ) arranged exit opening ( 4 ) for exhaust gas and the housing ( 1 ) from at least two shells ( 10 . 11 ), an inner shell ( 10 ) with a border ( 101 ) and one with the inner shell ( 10 ) connected outer shell ( 11 ) with a border ( 111 ) is formed, wherein the inner shell ( 10 ) with the outer shell ( 11 ) in the area of the two edges ( 101 . 111 ) is at least partially connected via a solder joint, characterized in that the edge ( 101 . 111 ) in a plane around the shell ( 10 . 11 ) is circumferentially formed and closed and a cutting edge produced by a cutting process ( 102 . 112 ) with a cut surface ( 103 . 113 ) and a degree of cutting ( 104 . 114 ) and the degree of cutting ( 104 . 114 ) on the inner shell ( 10 ) inwards and on the outer shell ( 11 ) is directed outwards, wherein the inner shell ( 10 ) with its edge ( 101 ) over the entire circumference of the edge ( 101 ) in the margin ( 111 ) of the outer shell ( 11 ) is inserted. Casing ( 1 ) according to claim 1, characterized in that the cut surface ( 103 . 113 ) in a direction of cut R perpendicular to a surface ( 12 ) of the edge ( 101 . 111 ) or in a slicing direction P parallel to the surface ( 12 ) of the edge ( 101 . 111 ) runs. Casing ( 1 ) according to claim 2, characterized in that the cut surfaces ( 103 . 113 ) of the outer shell ( 11 ) and the inner shell ( 10 ) in the direction of travel R perpendicular to the surface ( 12 ) of the edge ( 101 . 111 ). Casing ( 1 ) according to claim 2, characterized in that the edges ( 101 . 111 ) of the outer shell ( 11 ) in the direction of travel P parallel to the surface ( 12 ) of the edge ( 101 . 111 ) and the edges (101, 111 ) of the inner shell ( 10 ) in the direction of travel R perpendicular to the surface ( 12 ) of the edge ( 101 . 111 ). Casing ( 1 ) according to one of claims 2 to 4, characterized in that the edge ( 101 ) of the inner shell ( 10 ) and / or the border ( 111 ) of the outer shell ( 11 ) is designed as a collar with a height Hb larger or smaller diameter and at the end of the collar the cut surface ( 103 . 113 ) with the degree of cutting ( 104 . 114 ) is arranged. Casing ( 1 ) according to claim 5, characterized in that the edge ( 101 . 111 ) of the inner shell ( 10 ) in the area of the cut surface ( 103 . 113 ) inside and / or the edge ( 101 . 111 ) of the outer shell ( 11 ) in the area of the cut surface ( 103 . 113 ) is bent to the outside. Casing ( 1 ) according to one of the preceding claims, characterized in that the two shells ( 10 . 11 ) form a manifold shell. Casing ( 1 ) according to claim 7, characterized in that on the outer shell ( 11 ) one as outlet nozzle ( 4 ) formed outlet opening and on the inner shell ( 10 ) several as inlet ports ( 3 ) formed entrance openings are provided, wherein the outlet nozzle ( 4 ) with an output flange ( 6 ) and the inlet nozzles ( 3 ) each having an input flange ( 7 ) Are connected to each other gas-tight. Casing ( 1 ) according to claim 8, characterized in that the connection between the outlet nozzle ( 4 ) and the output flange ( 6 ) and the connection between the inlet ports ( 3 ) and the input flange ( 7 ) is designed as a solder joint. Casing ( 1 ) according to one of claims 7 to 9, characterized in that in the manifold shell ( 10 ) additional exhaust pipe exhaust manifold pipes are arranged. Casing ( 1 ) according to one of claims 1 to 6, characterized in that the portion is formed as a muffler housing, catalyst housing or sensor housing. Use of a section after one or several of the preceding claims for the preparation of a Exhaust system for internal combustion engines. System consisting of a section according to one or more of the preceding claims and an adjoining exhaust system ( 2 ). Method for producing a piece of sheet material for an exhaust system ( 2 ) of a motor vehicle, wherein the portion of a housing ( 1 ), at least one on the housing ( 1 ) arranged inlet opening ( 3 ) for exhaust gas and at least one on the housing ( 1 ) arranged exit opening ( 4 ) for exhaust gas and the housing ( 1 ) from at least two shells ( 10 . 11 ), an inner shell ( 10 ) with a border ( 101 ) and one with the inner shell ( 10 ) connected outer shell ( 11 ) with a border ( 111 ), characterized by at least the following method steps: a) deep-drawing the inner shell ( 10 ) and the outer shell ( 11 ); b) punching the inner shell ( 10 ) and the outer shell ( 11 ) for producing the edges ( 101 . 111 ) With i. a slicing direction R perpendicular to the surface ( 12 ) of the edge ( 101 . 111 ) and at right angles to a deep drawing direction T and / or ii. a slicing direction P parallel to the surface ( 12 ) of the edge ( 101 . 111 ) and parallel to the deep drawing direction T; c) inserting the inner shell ( 10 ) in the outer shell ( 11 ) so that the edges ( 101 . 111 ) are arranged parallel to each other; d) positioning an output flange ( 6 ) at the exit opening ( 4 ) and one input flange each ( 7 ) at in each case an inlet opening ( 3 ); e) bringing in a lot ( 5 ) into the respective gap ( 5 ) for establishing the connection between the inner shell ( 10 ) and the outer shell ( 11 ) and the connections between the inner shell ( 10 ) and the outer shell ( 11 ) and the respective flanges ( 6 . 7 ) by heating the section with the flanges ( 6 . 7 ). Method according to claim 14, characterized in that that all connections in a soldering or heating process getting produced. A method according to claim 15, characterized in that before the nesting of the two shells ( 10 . 11 ) separate manifold pipes in the shells ( 10 . 11 ) to be ordered.