WO2007036342A1 - Method for manufacturing a calibrated component, in particular for an exhaust-gas system of a motor vehicle, and component for an exhaust-gas system - Google Patents

Method for manufacturing a calibrated component, in particular for an exhaust-gas system of a motor vehicle, and component for an exhaust-gas system Download PDF

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Publication number
WO2007036342A1
WO2007036342A1 PCT/EP2006/009317 EP2006009317W WO2007036342A1 WO 2007036342 A1 WO2007036342 A1 WO 2007036342A1 EP 2006009317 W EP2006009317 W EP 2006009317W WO 2007036342 A1 WO2007036342 A1 WO 2007036342A1
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WO
WIPO (PCT)
Prior art keywords
weld
tube
component
exhaust
motor vehicle
Prior art date
Application number
PCT/EP2006/009317
Other languages
German (de)
French (fr)
Inventor
Peter Kroner
Erich Forster
Original Assignee
Emcon Technologies Germany (Augsburg) Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Emcon Technologies Germany (Augsburg) Gmbh filed Critical Emcon Technologies Germany (Augsburg) Gmbh
Priority to EP06792263A priority Critical patent/EP1933996A1/en
Publication of WO2007036342A1 publication Critical patent/WO2007036342A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • F01N3/2839—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration
    • F01N3/2853—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration using mats or gaskets between catalyst body and housing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/08—Other arrangements or adaptations of exhaust conduits
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/30—Finishing tubes, e.g. sizing, burnishing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D3/00—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N5/00—Exhaust or silencing apparatus combined or associated with devices profiting from exhaust energy
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2350/00—Arrangements for fitting catalyst support or particle filter element in the housing
    • F01N2350/02—Fitting ceramic monoliths in a metallic housing
    • F01N2350/04—Fitting ceramic monoliths in a metallic housing with means compensating thermal expansion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2450/00—Methods or apparatus for fitting, inserting or repairing different elements
    • F01N2450/02—Fitting monolithic blocks into the housing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters

Definitions

  • the invention relates to a method for producing a calibrated component, in particular for a motor vehicle exhaust system.
  • the invention also relates to a component for a motor vehicle exhaust system, in particular a housing for a substrate.
  • “Calibration” is understood to mean a process in which a generally elongate, generally tubular component made of a plastically deformable material is compressed in the radial direction and plastically deformed in order to achieve a specific inner diameter
  • the housing is provided as a tube with an inner diameter that is slightly larger than the outer diameter of the substrate, plus the wall thickness of a bearing mat surrounding the substrate the bearing mat is inserted together into the housing, and the housing is calibrated or reduced, whereby the inner diameter of the housing is reduced so far that the substrate and the bearing mat are held by friction in the housing.
  • the housing usually used consist of a metal strip, of which two longitudinal edges are connected to each other by means of a weld, so that a tube is formed.
  • the weld extends parallel to the longitudinal axis of the housing. It has been found that the weld during calibration can lead to problems and a relatively high reject rate. For some components, the housing collapses during calibration in the region of the weld seam. This results in that the weld is pushed into the interior of the housing, whereby the substrate received in the housing is destroyed.
  • the object of the invention is to improve the calibration process to the extent that the reject rate decreases. - -
  • a method for producing a calibrated component is provided according to the invention, in particular for a motor vehicle exhaust system, with the following steps: A tube is provided which has a weld seam along its longitudinal axis. Then it is detected at which point of the circumference of the tube, the weld is. Subsequently, the tube is aligned in the circumferential direction so that the weld is at a certain point. Then the tube is calibrated, the weld being covered by a pressure jaw.
  • the invention is based on the recognition that the weld during calibration can lead to problems in particular if it is free between two pressure jaws, by means of which the tube is calibrated. In contrast, if the tube is aligned in the circumferential direction so that the weld is in the region of a pressure jaw, a very low reject rate can be achieved.
  • the detection of the weld can be done by any suitable sensor, such as optical, inductive or mechanical. It is also possible to color-mark the weld to facilitate optical detection.
  • the method can be carried out so that the weld is always aligned to a single specific point, so based on a specific jaw.
  • the tube is only aligned in each case so far that the weld with each closest
  • a component for a motor vehicle exhaust system in particular a housing for a substrate, with a jacket which has a weld along its longitudinal axis, and on its
  • Outside surface having a plurality of pairs of pressure points of the pressure jaws, wherein the weld is within the two pressure points of a pressure jaw.
  • FIG. 1 shows schematically a first step of the invention
  • FIG. 2 shows schematically a second step of the method according to the invention
  • FIG. 3 shows schematically a third step of the method according to the invention.
  • FIG. 4 shows schematically a fourth step of the method according to the invention.
  • a tube 10 which consists of metal. It is made by bending and welding a sheet metal strip. Two of the longitudinal edges of the metal strip are connected by a weld 12.
  • the tube 10 can be brought by a schematically indicated cutting tool 14 to the desired length.
  • cutting tool is also understood to mean a laser cutting device This step can be omitted if the sheet metal strip already has the desired length before being bent.
  • a plurality of sensors 16 are shown schematically, which scan the tube 10 to the position of the weld 12 out.
  • the sensors 16 may scan the tube 10 inductively, optically, mechanically or in any other suitable manner.
  • a single sensor may be used and the tube is rotated until the sensor detects the weld.
  • Figure 3 is shown schematically that the position of the weld 12 is aligned in the circumferential direction in the desired manner.
  • the tube 10 is mounted on two rollers, one of which acts as a support roller 18 and the other as a drive roller 20. This is driven by a motor 22, so that the tube 10 will rotate about its longitudinal axis, that the weld 12 on a certain position in the circumferential direction is considered.
  • the amount and direction of rotation that the tube 10 must perform for this purpose depend on the previously detected position of the weld on the circumference of the tube.
  • FIG 4 is shown schematically how the tube 10 is calibrated by means of pressure jaws 24.
  • the pressure jaws 24 are around the circumference of the tube 10 around - A -
  • a schematically illustrated substrate 26 with bearing mat 28 is fixedly mounted in the tube. Due to the orientation of the weld 12 is ensured that it is "below” a pressure jaw 24, preferably centrally.

Abstract

A method for manufacturing a calibrated component, in particular for an exhaust-gas system of a motor vehicle, comprises the following steps: first of all, a tube (10) is provided which has a welded seam (12) along its longitudinal axis. It is then sensed at which location of the circumference of the tube (10) the welded seam (12) is situated. Subsequently, the tube (10) is oriented in the circumferential direction in such a way that the welded seam (12) is situated at a defined location. Finally, the tube (10) is calibrated, wherein the welded seam (12) is covered by a wedge grip (24). A component for an exhaust-gas system of a motor vehicle is provided, in particular a housing (10) for a substrate, having a cover which has a welded seam (12) along its longitudinal axis and has a plurality of pairs of grip locations for wedge grips (24) on its outer face, wherein the welded seam (12) lies within the two grip locations of a wedge grip (24).

Description

Verfahren zum Herstellen eines kalibrierten Bauteils, insbesondere für eine Abgasanlage eines Kraftfahrzeugs, sowie Bauteil für eine Abgasanlage Method for producing a calibrated component, in particular for an exhaust system of a motor vehicle, and component for an exhaust system
Die Erfindung betrifft ein Verfahren zur Herstellung eines kalibrierten Bauteils, insbesondere für eine Kraftfahrzeug-Abgasanlage. Die Erfindung betrifft auch ein Bauteil für eine Kraftfahrzeug-Abgasanlage, insbesondere ein Gehäuse für ein Substrat.The invention relates to a method for producing a calibrated component, in particular for a motor vehicle exhaust system. The invention also relates to a component for a motor vehicle exhaust system, in particular a housing for a substrate.
Unter „Kalibrieren" wird ein Verfahren verstanden, bei dem ein allgemein längliches, meist rohrförmiges Bauteil aus einem plastisch verformbaren Material in radialer Richtung gestaucht und dabei plastisch verformt wird, um einen bestimmten Innendurchmesser zu erzielen. Dieses Verfahren wird beispielsweise dafür eingesetzt, ein keramisches Substrat, beispielsweise einen Dieselpartikelfilter oder einen Katalysator für eine Abgasanlage, in einem Gehäuse aufzunehmen. Das Gehäuse wird als Rohr mit einem Innendurchmesser bereitgestellt, der geringfügig größer ist als der Außendurchmesser des Substrates, zuzüglich der Wandstärke einer das Substrat üblicherweise umgebenden Lagermatte. Das Substrat wird mit der Lagermatte zusammen in das Gehäuse eingesetzt, und das Gehäuse wird kalibriert bzw. reduziert, wodurch sich der Innendurchmesser des Gehäuses soweit verringert, daß das Substrat und die Lagermatte durch Reibung fest im Gehäuse gehalten sind."Calibration" is understood to mean a process in which a generally elongate, generally tubular component made of a plastically deformable material is compressed in the radial direction and plastically deformed in order to achieve a specific inner diameter The housing is provided as a tube with an inner diameter that is slightly larger than the outer diameter of the substrate, plus the wall thickness of a bearing mat surrounding the substrate the bearing mat is inserted together into the housing, and the housing is calibrated or reduced, whereby the inner diameter of the housing is reduced so far that the substrate and the bearing mat are held by friction in the housing.
Die üblicherweise verwendeten Gehäuse bestehen aus einem Blechstreifen, von dem zwei Längsränder mittels einer Schweißnaht miteinander verbunden sind, so daß ein Rohr gebildet ist. Die Schweißnaht erstreckt sich dabei parallel zur Langsachse des Gehäuses. Es hat sich herausgestellt, daß die Schweißnaht beim Kalibrieren zu Problemen und zu einer verhältnismäßig hohen Ausschußrate führen kann. Bei einigen Bauteilen kollabiert nämlich das Gehäuse beim Kalibrieren im Bereich der Schweißnaht. Dies führt dazu, daß die Schweißnaht in das Innere des Gehäuses hineingeschoben wird, wodurch das im Gehäuse aufgenommene Substrat zerstört wird.The housing usually used consist of a metal strip, of which two longitudinal edges are connected to each other by means of a weld, so that a tube is formed. The weld extends parallel to the longitudinal axis of the housing. It has been found that the weld during calibration can lead to problems and a relatively high reject rate. For some components, the housing collapses during calibration in the region of the weld seam. This results in that the weld is pushed into the interior of the housing, whereby the substrate received in the housing is destroyed.
Die Aufgabe der Erfindung besteht darin, das Kalibrier-Verfahren dahingehend zu verbessern, daß die Ausschußrate sinkt. - -The object of the invention is to improve the calibration process to the extent that the reject rate decreases. - -
Zur Lösung dieser Aufgabe ist erfindungsgemäß ein Verfahren zur Herstellung eines kalibrierten Bauteils vorgesehen, insbesondere für eine Kraftfahrzeug-Abgasanlage, mit den folgenden Schritten: Es wird ein Rohr bereitgestellt, das entlang seiner Längsachse eine Schweißnaht aufweist. Dann wird erfaßt, an welcher Stelle des Umfangs des Rohres sich die Schweißnaht befindet. Anschließend wird das Rohr in Umfangsrichtung so ausgerichtet, daß sich die Schweißnaht an einer bestimmten Stelle befindet. Dann wird das Rohr kalibriert, wobei die Schweißnaht von einer Druckbacke überdeckt wird. Die Erfindung beruht auf der Erkenntnis, daß die Schweißnaht beim Kalibrieren insbesondere dann zu Problemen führen kann, wenn sie frei zwischen zwei Druckbacken liegt, mittels denen das Rohr kalibriert wird. Wenn dagegen das Rohr in Umfangsrichtung so ausgerichtet wird, daß sich die Schweißnaht im Bereich einer Druckbacke befindet, läßt sich eine sehr geringe Ausschußrate erzielen.To achieve this object, a method for producing a calibrated component is provided according to the invention, in particular for a motor vehicle exhaust system, with the following steps: A tube is provided which has a weld seam along its longitudinal axis. Then it is detected at which point of the circumference of the tube, the weld is. Subsequently, the tube is aligned in the circumferential direction so that the weld is at a certain point. Then the tube is calibrated, the weld being covered by a pressure jaw. The invention is based on the recognition that the weld during calibration can lead to problems in particular if it is free between two pressure jaws, by means of which the tube is calibrated. In contrast, if the tube is aligned in the circumferential direction so that the weld is in the region of a pressure jaw, a very low reject rate can be achieved.
Die Erfassung der Schweißnaht kann durch jeden geeigneten Sensor erfolgen, beispielsweise optisch, induktiv oder mechanisch. Es ist auch möglich, die Schweißnaht farbig zu markieren, um die optische Erfassung zu erleichtern.The detection of the weld can be done by any suitable sensor, such as optical, inductive or mechanical. It is also possible to color-mark the weld to facilitate optical detection.
Das Verfahren kann so ausgeführt werden, daß die Schweißnaht immer auf eine einzige bestimmte Stelle ausgerichtet wird, also bezogen auf eine bestimmte Druckbacke. Alternativ kann vorgesehen sein, daß das Rohr nur jeweils soweit ausgerichtet wird, daß die Schweißnaht sich mit der jeweils nächst gelegenenThe method can be carried out so that the weld is always aligned to a single specific point, so based on a specific jaw. Alternatively, it can be provided that the tube is only aligned in each case so far that the weld with each closest
Druckbacke in Überdeckung befindet.Jaw is in overlap.
Erfindungsgemäß ist auch ein Bauteil für eine Kraftfahrzeug-Abgasanlage vorgesehen, insbesondere ein Gehäuse für ein Substrat, mit einem Mantel, der entlang seiner Längsachse eine Schweißnaht aufweist, und auf seinerAccording to the invention, a component for a motor vehicle exhaust system is provided, in particular a housing for a substrate, with a jacket which has a weld along its longitudinal axis, and on its
Außenfläche mehrere Paare von Druckstellen von Druckbacken aufweist, wobei die Schweißnaht innerhalb der beiden Druckstellen einer Druckbacke liegt.Outside surface having a plurality of pairs of pressure points of the pressure jaws, wherein the weld is within the two pressure points of a pressure jaw.
Die Erfindung wird nachfolgend anhand einer Ausführungsform beschrieben, die in den beigefügten Zeichnungen dargestellt ist. In diesen zeigen:The invention will be described below with reference to an embodiment shown in the accompanying drawings. In these show:
- Figur 1 schematisch einen ersten Schritt des erfindungsgemäßen- Figure 1 shows schematically a first step of the invention
Verfahrens;process;
- Figur 2schematisch einen zweiten Schritt des erfindungemäßen Verfahrens; - Figur 3schematisch einen dritten Schritt des erfindungsgemäßen Verfahrens; undFIG. 2 shows schematically a second step of the method according to the invention; FIG. 3 shows schematically a third step of the method according to the invention; and
- Figur 4schematisch einen vierten Schritt des erfindungsgemäßen Verfahrens.FIG. 4 shows schematically a fourth step of the method according to the invention.
In Figur 1 ist ein Rohr 10 gezeigt, welches aus Metall besteht. Es ist hergestellt durch Biegen und Schweißen eines Blechstreifens. Zwei der Längsränder des Blechstreifens sind durch eine Schweißnaht 12 miteinander verbunden. Das Rohr 10 kann durch ein schematisch angedeutetes Schneidwerkzeug 14 auf die gewünschte Länge gebracht werden. Unter „Schneidwerkzeug" wird hier natürlich auch eine Laserschneidvorrichtung verstanden. Dieser Schritt kann entfallen, wenn der Blechstreifen bereits vor dem Biegen die gewünschte Länge aufweist.In Figure 1, a tube 10 is shown, which consists of metal. It is made by bending and welding a sheet metal strip. Two of the longitudinal edges of the metal strip are connected by a weld 12. The tube 10 can be brought by a schematically indicated cutting tool 14 to the desired length. Of course, the term "cutting tool" is also understood to mean a laser cutting device This step can be omitted if the sheet metal strip already has the desired length before being bent.
In Figur 2 sind schematisch mehrere Sensoren 16 gezeigt, die das Rohr 10 auf die Lage der Schweißnaht 12 hin abtasten. Die Sensoren 16 können das Rohr 10 induktiv, optisch, mechanisch oder auf eine sonstige geeignete Weise abtasten. Alternativ kann ein einziger Sensor verwendet werden, und das Rohr wird so lange gedreht, bis der Sensor die Schweißnaht erfaßt.In Figure 2, a plurality of sensors 16 are shown schematically, which scan the tube 10 to the position of the weld 12 out. The sensors 16 may scan the tube 10 inductively, optically, mechanically or in any other suitable manner. Alternatively, a single sensor may be used and the tube is rotated until the sensor detects the weld.
In Figur 3 ist schematisch gezeigt, daß die Lage der Schweißnaht 12 in Umfangsrichtung in der gewünschten Weise ausgerichtet wird. Hierzu wird das Rohr 10 auf zwei Rollen gelagert, von denen eine als Abstützrolle 18 wirkt und die andere als Antriebsrolle 20. Diese wird von einem Motor 22 angetrieben, so daß das Rohr 10 so um seine Längsachse drehen wird, daß die Schweißnaht 12 auf eine bestimmte Stellung in der Umfangsrichtung betrachtet ausgerichtet ist. Betrag und Richtung der Drehung, die das Rohr 10 zu diesem Zweck ausführen muß, hängen dabei von der vorher erfaßten Position der Schweißnaht am Umfang des Rohres ab.In Figure 3 is shown schematically that the position of the weld 12 is aligned in the circumferential direction in the desired manner. For this purpose, the tube 10 is mounted on two rollers, one of which acts as a support roller 18 and the other as a drive roller 20. This is driven by a motor 22, so that the tube 10 will rotate about its longitudinal axis, that the weld 12 on a certain position in the circumferential direction is considered. The amount and direction of rotation that the tube 10 must perform for this purpose depend on the previously detected position of the weld on the circumference of the tube.
Alternativ ist es möglich, das Rohr vor dem Ablängen korrekt auszurichten. Wenn anschließend sichergestellt wird, daß das Rohr im Umfangsrichtung nicht mehr unkontrolliert verdreht wird, kann auf eine spätere Erfassung der Lage der Schweißnaht verzichtet werden.Alternatively, it is possible to properly align the tube before cutting to length. If it is then ensured that the tube is no longer uncontrolled in the circumferential direction, can be dispensed with a subsequent detection of the position of the weld.
In Figur 4 ist schematisch gezeigt, wie das Rohr 10 mittels Druckbacken 24 kalibriert wird. Die Druckbacken 24 sind um den Umfang des Rohres 10 herum - A -In Figure 4 is shown schematically how the tube 10 is calibrated by means of pressure jaws 24. The pressure jaws 24 are around the circumference of the tube 10 around - A -
verteilt und üben einen Druck radial nach innen aus, der zur Stauchung des Rohres 10 führt. Auf diese Weise ist ein schematisch dargestelltes Substrat 26 mit Lagermatte 28 fest im Rohr montiert. Aufgrund der Ausrichtung der Schweißnaht 12 ist gewährleistet, daß diese „unter" einer Druckbacke 24 liegt, vorzugsweise mittig. distributed and exert a pressure radially inward, which leads to the compression of the tube 10. In this way, a schematically illustrated substrate 26 with bearing mat 28 is fixedly mounted in the tube. Due to the orientation of the weld 12 is ensured that it is "below" a pressure jaw 24, preferably centrally.
BezugszeichenlisteLIST OF REFERENCE NUMBERS
Rohrpipe
SchweißnahtWeld
Schneidwerkzeugcutting tool
Sensorsensor
Abstützrollesupport roller
Antriebsrollecapstan
Motorengine
Druckbackegib
Substratsubstratum
Lagermatte bearing mat

Claims

- -Patentansprüche - Patent claims
1. Verfahren zur Herstellung eines kalibrierten Bauteils, insbesondere für eine Kraftfahrzeug-Abgasanlage, mit den folgenden Schritten:1. A method for producing a calibrated component, in particular for a motor vehicle exhaust system, comprising the following steps:
- es wird ein Rohr (10) bereitgestellt, das entlang seiner Längsachse eine Schweißnaht (12) aufweist;- There is provided a tube (10) having along its longitudinal axis a weld (12);
- es wird erfaßt, an welcher Stelle des Umfangs des Rohres (10) sich die Schweißnaht (12) befindet;- It is detected, at which point of the circumference of the tube (10), the weld (12) is located;
- das Rohr (10) wird in Umfangsrichtung so ausgerichtet, daß sich die Schweißnaht (12) an einer bestimmten Stelle befindet; - das Rohr (10) wird kalibriert, wobei die Schweißnaht (12) von einer- The tube (10) is aligned in the circumferential direction so that the weld (12) is located at a certain point; - The tube (10) is calibrated, wherein the weld (12) of a
Druckbacke (24) überdeckt wird.Compression jaw (24) is covered.
2. Verfahren nach Anspruch 1 , dadurch gekennzeichnet, daß die Erfassung der Schweißnaht (12) optisch erfolgt.2. The method according to claim 1, characterized in that the detection of the weld (12) takes place optically.
3. Verfahren nach Anspruch 1 , dadurch gekennzeichnet, daß die Erfassung der Schweißnaht (12) induktiv erfolgt.3. The method according to claim 1, characterized in that the detection of the weld seam (12) takes place inductively.
4. Verfahren nach Anspruch 1 , dadurch gekennzeichnet, daß die Erfassung der Schweißnaht (12) mechanisch erfolgt.4. The method according to claim 1, characterized in that the detection of the weld seam (12) takes place mechanically.
5. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß es nur eine vorbestimmte Stelle gibt.5. The method according to any one of the preceding claims, characterized in that there is only one predetermined point.
6. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß es mehrere vorbestimmten Stellen gibt, wobei die Anzahl der vorbestimmten Stellen kleiner ist als die Anzahl der Druckbacken.6. The method according to any one of the preceding claims, characterized in that there are a plurality of predetermined locations, wherein the number of predetermined locations is smaller than the number of the pressure jaws.
7. Verfahren nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß es so viele vorbestimmte Stellen wie Druckbacken (24) gibt.7. The method according to any one of claims 1 to 4, characterized in that there are as many predetermined locations as pressure jaws (24).
8. Bauteil für eine Kraftfahrzeug-Abgasanlage, insbesondere Gehäuse (10) für ein Substrat, mit einem Mantel, der entlang seiner Längsachse eine Schweißnaht (12) aufweist, und auf seiner Außenfläche mehrere Paare von Druckstellen von Druckbacken (24) aufweist, wobei die Schweißnaht (12) innerhalb der beiden Druckstellen einer Druckbacke (24) liegt. 8. Component for a motor vehicle exhaust system, in particular housing (10) for a substrate, with a jacket which has along its longitudinal axis a weld (12), and on its outer surface a plurality of pressure points of pressure jaws (24), wherein the Weld (12) within the two pressure points of a pressure jaw (24).
PCT/EP2006/009317 2005-09-29 2006-09-26 Method for manufacturing a calibrated component, in particular for an exhaust-gas system of a motor vehicle, and component for an exhaust-gas system WO2007036342A1 (en)

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DE102005046767.9 2005-09-29
DE102005046767A DE102005046767A1 (en) 2005-09-29 2005-09-29 Process to fabricate automotive catalytic converter housing by external application over weld seam

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JP2008298019A (en) * 2007-06-01 2008-12-11 Yutaka Giken Co Ltd Mat compressing method and mat compressing device of exhaust emission control device
JP2008298021A (en) * 2007-06-01 2008-12-11 Yutaka Giken Co Ltd Mat attaching method and mat attaching device of exhaust emission control device

Families Citing this family (1)

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Publication number Priority date Publication date Assignee Title
GB2463418B (en) * 2007-06-01 2012-01-18 Yutaka Giken Co Ltd Method and apparatus for compressing a mat in exhaust gas cleaning device

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US2780271A (en) * 1951-09-27 1957-02-05 Smith Corp A O Apparatus for mechanically expanding large diameter pipe
JPS54138858A (en) * 1978-04-21 1979-10-27 Hitachi Ltd Controlling method for seam position
DE3019592A1 (en) * 1979-05-22 1980-12-04 Nippon Kokan Kk UPRIGHT SHRINKING DEVICE
JPS59112209A (en) * 1982-12-20 1984-06-28 Nippon Steel Corp Measuring method of shape of steel tube weld zone
JPS59220213A (en) * 1983-05-31 1984-12-11 Kogen Kizai Kk Method and device for forming coiled pipe end part
US6334981B1 (en) * 1994-12-20 2002-01-01 EMITEC GESELLSCHAFT FüR EMISSIONSTECHNOLOGIES MBH Double-walled housing, in particular for exhaust gas catalytic converters of motor vehicles and method of producing a double-walled housing
EP0828136A1 (en) * 1996-08-31 1998-03-11 MFB Werkzeugsysteme und Anlagen GmbH Method and apparatus for determining the angular position of substantially cylindrical bodies
JP2002097944A (en) * 2000-09-26 2002-04-05 Tokyo Roki Co Ltd Covering method of catalyst carrier and diameter- shrinkage processing device used for this method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008298019A (en) * 2007-06-01 2008-12-11 Yutaka Giken Co Ltd Mat compressing method and mat compressing device of exhaust emission control device
JP2008298021A (en) * 2007-06-01 2008-12-11 Yutaka Giken Co Ltd Mat attaching method and mat attaching device of exhaust emission control device

Also Published As

Publication number Publication date
CN101277773A (en) 2008-10-01
EP1933996A1 (en) 2008-06-25
DE102005046767A1 (en) 2007-04-05
KR20080044320A (en) 2008-05-20

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