EP1479458A2 - Method for manufacturing tubes and profiles - Google Patents

Method for manufacturing tubes and profiles Download PDF

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Publication number
EP1479458A2
EP1479458A2 EP04012217A EP04012217A EP1479458A2 EP 1479458 A2 EP1479458 A2 EP 1479458A2 EP 04012217 A EP04012217 A EP 04012217A EP 04012217 A EP04012217 A EP 04012217A EP 1479458 A2 EP1479458 A2 EP 1479458A2
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EP
European Patent Office
Prior art keywords
strip material
length
profile
endless
strip
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Granted
Application number
EP04012217A
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German (de)
French (fr)
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EP1479458A3 (en
EP1479458B1 (en
Inventor
Andreas Dr.-Ing. Hauger
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Muhr und Bender KG
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Muhr und Bender KG
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Classifications

    • 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
    • B21C37/15—Making tubes of special shape; Making tube fittings
    • B21C37/16—Making tubes with varying diameter in longitudinal direction
    • 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
    • B21C37/08—Making tubes with welded or soldered seams
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49616—Structural member making
    • Y10T29/49622—Vehicular structural member making
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49789—Obtaining plural product pieces from unitary workpiece
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49828—Progressively advancing of work assembly station or assembled portion of work
    • Y10T29/49829—Advancing work to successive stations [i.e., assembly line]
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49947—Assembling or joining by applying separate fastener
    • Y10T29/49966—Assembling or joining by applying separate fastener with supplemental joining
    • Y10T29/49968—Metal fusion joining
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/51—Plural diverse manufacturing apparatus including means for metal shaping or assembling
    • Y10T29/5185—Tube making

Definitions

  • the invention relates to a method for producing pipes and profiles with over the length of variable wall thickness.
  • EP 0 788 849 A1 discloses a similar process for the production of pipes with sections of different wall thickness, in which an initial level Sheet metal by targeted partial wall thickness reduction areas of different Wall thickness arise with parallel course. This is the rolled Sheet metal cut, formed into a tube and along the abutting edges joined, in particular welded.
  • DD 244 083 A1 discloses a process for the production of pipes and hollow profiles with longitudinally changing inner diameter known.
  • the so differently rolled out metal strip is then in a profile plant profiled to the tube or hollow profile.
  • the periodic change from rolled to unrolled strip sections limited the rolling speed and can cause weak spots in the band at the Transitions lead.
  • the passage of the non-rolled band sections through the Rolling device is given no guidance of the metal strip. This is not an exact one Length measurement of the non-rolled band sections possible.
  • process control becomes the strip material after the high speed taking flexible rolls with a first winding speed on a Coil wound and for forming the strip material to the endless tube or Profile with a second lower winding speed, which on the forming optimized for endless tube or profile, unwound from this coil.
  • Systems for bending round to a tube in the longitudinal direction of the strip material or for forming into a profile in the longitudinal direction of the strip material with corresponding Roller assemblies with forming rollers are known in the art. Such systems include a plurality of consecutively in the production direction Forming rolls with regularly changing roll shape and / or axis position.
  • the tubes and profiles may be open in cross-section slotted tubes or Profile or cross-section closed tubes or profiles act.
  • preferred Procedure is the endless pipe or profile to the closed pipe or Longitudinal profile - especially in blunt joint - welded.
  • the inner diameter or cross-section are kept constant while the variable Wall thickness at the outer diameter or cross-section maps.
  • the individual Pipe or profile pieces formed after cutting to such an extent that they over the length have variable cross-sections.
  • Such pieces of pipe are used in particular Automotive engineering used in many applications, especially as a carrier with defined non-uniform deformation behavior (crash elements) or with defined non-uniform load behavior (bending beam).
  • the length remains constant over the length Round tubes formed so that at least one longitudinal section out of round, in particular is flattened laterally in cross section.
  • FIG. 1 An embodiment of such a tube is shown in the single drawing.
  • This shows in representation a an inventive tube 11 in longitudinal section.
  • first sections 12, 13, 14 with greater wall thickness and one-sided Flattening 18 and two sections 16, 17 of lesser wall thickness with undeformed circular cross section recognizable.
  • a longitudinal seam 19 is marked, which is not directly affected by the subsequent forming of the tube.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
  • Heat Treatment Of Articles (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)

Abstract

The tube and stock producing process involves producing a tube (11) or stock with varying wall thickness along the length. Endless strip material is flexibly rolled with variably reduced final thickness in the longitudinal direction of the strip. The strip material is deformed into an endless tube or stock article. This is then cut into sections (12, 13, 14, 16).

Description

Die Erfindung betrifft ein Verfahren zum Herstellen von Rohren und Profilen mit über der Länge variabler Wandstärke.The invention relates to a method for producing pipes and profiles with over the length of variable wall thickness.

Aus der DE 104 875 ist es bekannt, tafel- oder streifenförmige Blechstücke so auszuwalzen, daß parallele Streifen unterschiedlicher Wandstärke an dem Blechstück entstehen. Danach wird das Blechstück quer zu diesen Streifen rundgebogen und zu einem Rohr verlötet, wodurch das Rohr Längsabschnitte unterschiedlicher Wandstärke erhält.From DE 104 875 it is known to strip sheet-shaped or strip-shaped sheet metal pieces, that parallel strips of different wall thickness on the piece of sheet metal arise. Thereafter, the piece of sheet metal is bent around and bent around these strips soldered to a tube, whereby the tube longitudinal sections of different wall thickness receives.

Aus der EP 0 788 849 A1 ist ein gleichartiges Verfahren zur Herstellung von Rohren mit Abschnitten unterschiedlicher Wandstärke bekannt, bei dem aus einem anfangsebenen Blech durch gezielte partielle Wanddickenreduktion Bereiche unterschiedlicher Wanddicke mit zueinander parallelen Verlauf entstehen. Hierbei wird das gewalzte Blech zugeschnitten, zu einem Rohr umgeformt und entlang der Stoßkanten gefügt, insbesondere verschweißt.EP 0 788 849 A1 discloses a similar process for the production of pipes with sections of different wall thickness, in which an initial level Sheet metal by targeted partial wall thickness reduction areas of different Wall thickness arise with parallel course. This is the rolled Sheet metal cut, formed into a tube and along the abutting edges joined, in particular welded.

Aus der DD 244 083 A1 ist ein Verfahren zur Herstellung von Rohren und Hohlprofilen mit in Längsrichtung sich änderndem Innendurchmesser bekannt. Hierbei werden vorbestimmte Abschnitte eines Metallbandes ausgewalzt, während die übrigen Abschnitte ihre ungewalzte Form und damit die ursprüngliche Materialstärke beibehalten. Das so unterschiedlich ausgewalzte Metallband wird in einer Profilanlage dann zum Rohr oder Hohlprofil profiliert.From DD 244 083 A1 discloses a process for the production of pipes and hollow profiles with longitudinally changing inner diameter known. Here are predetermined sections of a metal strip rolled while the remaining sections maintain their non-rolled shape and thus the original material thickness. The so differently rolled out metal strip is then in a profile plant profiled to the tube or hollow profile.

Der periodische Wechsel von ausgewalzten zu ungewalzten Bandabschnitten beschränkt die Walzgeschwindigkeit und kann zu Schwachstellen im Band an den Übergängen führen. Beim Durchlauf der ungewalzten Bandabschnitte durch die Walzeinrichtung ist keine Führung des Metallbandes gegeben. Damit ist keine exakte Längenbemessung der ungewalzten Bandabschnitte möglich.The periodic change from rolled to unrolled strip sections limited the rolling speed and can cause weak spots in the band at the Transitions lead. During the passage of the non-rolled band sections through the Rolling device is given no guidance of the metal strip. This is not an exact one Length measurement of the non-rolled band sections possible.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, ein verbessertes Herstellungsverfahren mit erhöhter Produktivität für Rohre und Profile der genannten Art in verbesserter Qualität bereitzustellen. Die Lösung hierfür besteht in einem Verfahren mit den erfindungsgemäßen Schritten:

  • flexibles Walzen von endlosem Bandmaterial mit in Längsrichtung des Bandmaterials variabler, durchgehend gegenüber der Ausgangsdicke reduzierter Enddicke,
  • Umformen des Bandmaterials zu einem endlosen Rohr oder Profil,
  • Ablängen einzelner Rohr- oder Profilstücke vom endlosen Rohr oder Profil.
    • The present invention has for its object to provide an improved production method with increased productivity for pipes and profiles of the type mentioned in improved quality. The solution to this consists in a method with the steps according to the invention:
  • flexible rolling of endless strip material with variable in the longitudinal direction of the strip material, continuously reduced compared to the initial thickness final thickness,
  • Forming the strip material into an endless tube or profile,
  • Cutting to length individual pipe or profile pieces from the endless pipe or profile.

    • Mit diesem Verfahren wird die Technik des flexiblen Walzen von endlosem Bandmaterial, wie sie z. B. in der Deutschen Patentanmeldung 103 15 357.8 der Anmelderin beschrieben ist, für die Herstellung von Rohren und Profilen der genannten Art zur Erhöhung der Produktivität erschlossen.With this method, the technique of flexible rolling of endless strip material, as they are z. B. in German Patent Application 103 15 357.8 of the Applicant is described for the production of pipes and profiles of the type mentioned Increased productivity.

    Hierbei ist es grundsätzlich möglich, die Walzgeschwindigkeit an die bestmögliche Umformgeschwindigkeit für das Umformen zum endlosen Rohr oder Profil anzupassen, so daß sämtliche Verfahrensschritte synchron ablaufen können. In bevorzugter Verfahrensführung wird jedoch das Bandmaterial nach dem mit hoher Geschwindigkeit erfolgenden flexiblen Walzen mit einer ersten Wickelgeschwindigkeit auf einen Coil aufgewickelt und zum Umformen des Bandmaterials zum endlosen Rohr oder Profil mit einer zweiten geringeren Wickelgeschwindigkeit, die auf das Umformen zum endlosen Rohr oder Profil optimiert ist, von diesem Coil abgewickelt.Here it is possible in principle, the rolling speed to the best possible Adapt forming speed for forming to continuous tube or profile, so that all process steps can run synchronously. In preferred However, process control becomes the strip material after the high speed taking flexible rolls with a first winding speed on a Coil wound and for forming the strip material to the endless tube or Profile with a second lower winding speed, which on the forming optimized for endless tube or profile, unwound from this coil.

    Anlagen zum Rundbiegen zu einem Rohr in Längsrichtung des Bandmaterials bzw. zum Umformen zu einem Profil in Längsrichtung des Bandmaterials mit entsprechender Walzenanordnung mit formgebenden Walzen sind in der Technik bekannt. Solche Anlagen umfassen eine Vielzahl von in Produktionsrichtung hintereinanderliegenden Formwalzen mit sich regelmäßig ändernder Walzenform und/oder Achslage. Systems for bending round to a tube in the longitudinal direction of the strip material or for forming into a profile in the longitudinal direction of the strip material with corresponding Roller assemblies with forming rollers are known in the art. Such systems include a plurality of consecutively in the production direction Forming rolls with regularly changing roll shape and / or axis position.

    Bei den Rohren und Profilen kann es sich um im Querschnitt offene Schlitzrohre oder Profile oder im Querschnitt geschlossene Rohre oder Profile handeln. In bevorzugter Verfahrensführung wird das endlose Rohr oder Profil zum geschlossen Rohr oder Profil längs - insbesondere in stumpfem Stoß - verschweißt. Hierbei kann der Innendurchmesser oder -querschnitt konstant gehalten werden, während sich die variable Wanddicke am Außendurchmesser oder -querschnitt abbildet.The tubes and profiles may be open in cross-section slotted tubes or Profile or cross-section closed tubes or profiles act. In preferred Procedure is the endless pipe or profile to the closed pipe or Longitudinal profile - especially in blunt joint - welded. Here, the inner diameter or cross-section are kept constant while the variable Wall thickness at the outer diameter or cross-section maps.

    Nach einer weiterführenden günstigen Verfahrensgestaltung werden die einzelnen Rohr- oder Profilstücke nach dem Ablängen derart umgeformt, daß sie über der Länge variable Querschnitte aufweisen. Derartige Rohrstücke werden insbesondere im Kraftfahrzeugbau in vielen Verwendungszwecken eingesetzt, insbesondere als Träger mit definiertem ungleichförmigen Verformungsverhalten (Crashelemente) oder mit definiertem ungleichförmigen Belastungsverhalten (Biegeträger).After a continuing favorable process design, the individual Pipe or profile pieces formed after cutting to such an extent that they over the length have variable cross-sections. Such pieces of pipe are used in particular Automotive engineering used in many applications, especially as a carrier with defined non-uniform deformation behavior (crash elements) or with defined non-uniform load behavior (bending beam).

    Nach einer besondere Verfahrensführung werden zunächst über der Länge gleichbleibend runde Rohre so umgeformt, daß zumindest ein Längsabschnitt unrund, insbesondere im Querschnitt seitlich abgeflacht ist.After a special procedure, the length remains constant over the length Round tubes formed so that at least one longitudinal section out of round, in particular is flattened laterally in cross section.

    Beim flexiblen Walzen werden stetige Übergänge zwischen den einzelnen Bandabschnitten bezüglich der Dicke hergestellt. Es findet insbesondere eine Reduzierung der Ausgangsdicke von durchgehend mindestens 5 % statt. Hierbei sollten sich aneinander anschließende Bandabschnitte in der Enddicke um mindestens 20 %, insbesondere mehr als 25 % unterscheiden. Die Übergänge zwischen einzelnen Bandabschnitten unterschiedlicher konstanter Bandenddicke sollen so gestreckt sein, daß ein Gradient aus Dickenänderung zu Bandlänge von höchstens 1:40 entsteht.When flexible rolling continuous transitions between the individual band sections made in thickness. It finds in particular a reduction the initial thickness of at least 5% throughout. This should be together subsequent strip sections in the final thickness by at least 20%, in particular differentiate more than 25%. The transitions between individual band sections different constant Bandenddicke should be stretched so that a gradient of thickness change to strip length of at most 1:40 is formed.

    Ein Ausführungsbeispiel für ein solches Rohr ist in der einzigen Zeichnung dargestellt. Diese zeigt in Darstellung a ein erfindungsgemäßes Rohr 11 im Längsschnitt. An dem Rohr sind erste Abschnitte 12, 13, 14 mit größerer Wandstärke und einseitigen Abflachungen 18 sowie zwei Abschnitte 16, 17 geringerer Wandstärke mit unverformtem kreisrunden Querschnitt erkennbar. Weiterhin ist eine Längsnaht 19 markiert, die vom nachträglichen Umformen des Rohres nicht unmittelbar betroffen ist.An embodiment of such a tube is shown in the single drawing. This shows in representation a an inventive tube 11 in longitudinal section. On the tube are first sections 12, 13, 14 with greater wall thickness and one-sided Flattening 18 and two sections 16, 17 of lesser wall thickness with undeformed circular cross section recognizable. Furthermore, a longitudinal seam 19 is marked, which is not directly affected by the subsequent forming of the tube.

    Claims (10)

    Verfahren zum Herstellen von Rohren und Profilen mit über der Länge variabler Wanddicke,
    mit den Schritten,
    flexibles Walzen von endlosem Bandmaterial mit in Längsrichtung des Bandmaterials variabler, durchgehend gegenüber der Ausgangsdicke reduzierter Enddicke,
    Umformen des Bandmaterials zu einem endlosen Rohr oder Profil,
    Ablängen einzelner Rohr- oder Profilstücke vom endlosen Rohr oder Profil.    Method for producing pipes and profiles with wall thickness variable over the length,
    with the steps,
    flexible rolling of endless strip material with variable in the longitudinal direction of the strip material, continuously reduced compared to the initial thickness final thickness,
    Forming the strip material into an endless tube or profile,
    Cutting to length individual pipe or profile pieces from the endless pipe or profile.         Verfahren nach Anspruch 1,
    dadurch gekennzeichnet, daß nach dem flexiblen Walzen das endlose Bandmaterial mit einer ersten Wickelgeschwindigkeit auf einen Coil aufgewickelt wird und daß das endlose Bandmaterial von diesem Coil zum Umformen des Bandmaterials mit einer zweiten geringeren Wickelgeschwindigkeit abgewickelt wird.    Method according to claim 1,
    characterized in that after the flexible rolling, the endless strip material is wound on a coil at a first winding speed, and that the endless strip material is unwound from this coil for forming the strip material at a second lower winding speed.         Verfahren nach einem der Ansprüche 1 oder 2,
    dadurch gekennzeichnet, daß das Bandmaterial nach dem Umformen und vor dem Ablängen zum geschlossenen Rohr oder Profil längs verschweißt wird.    Method according to one of claims 1 or 2,
    characterized in that the strip material is welded longitudinally after forming and before cutting to a closed tube or profile.         Verfahren nach einem der Ansprüche 1 bis 3,
    dadurch gekennzeichnet, daß die einzelnen Rohr- oder Profilstücke nach dem Ablängen zu über der Länge variablen Querschnitten umgeformt werden.    Method according to one of claims 1 to 3,
    characterized in that the individual pipe or profile pieces are transformed after cutting to over the length of variable cross-sections.         Verfahren nach Anspruch 4,
    dadurch gekennzeichnet, daß die Umformung durch hydraulische Innendruckumformverfahren erfolgt.    Method according to claim 4,
    characterized in that the deformation takes place by hydraulic internal pressure forming process.         Verfahren nach einem der Ansprüche 4 oder 5,
    dadurch gekennzeichnet, daß ein zunächst über der Länge gleichbleibend rundes Rohrstück so umgeformt wird, daß zumindest ein Längsabschnitt unrund, insbesondere einseitig abgeflacht ist.    Method according to one of claims 4 or 5,
    characterized in that a first over the length of consistently round pipe section is reshaped so that at least one longitudinal section is non-circular, in particular flattened on one side.         Verfahren nach einem der Ansprüche 4 oder 5,
    dadurch gekennzeichnet, daß ein Profilstück mit zunächst über der Länge gleichbleibendem Querschnitt so umgeformt wird, daß zumindest ein Längsabschnitt im Querschnitt davon abweicht.    Method according to one of claims 4 or 5,
    characterized in that a profile piece is initially formed over the length of constant cross section so that at least one longitudinal section deviates in cross section thereof.         Verfahren nach einem der Ansprüche 1 bis 7,
    dadurch gekennzeichnet, daß beim flexiblen Walzen eine Reduzierung der Ausgangsdicke von durchgehend mindestens 5 % stattfindet.    Method according to one of claims 1 to 7,
    characterized in that during flexible rolling, a reduction of the initial thickness of at least 5% takes place.         Verfahren nach einem der Ansprüche 1 bis 8,
    dadurch gekennzeichnet, daß sich aneinander anschließende Bandabschnitte um mindestens 20 %, insbesondere mehr als 25 % in der Enddicke unterscheiden.    Method according to one of claims 1 to 8,
    characterized in that adjoining band sections differ by at least 20%, in particular more than 25% in the final thickness.         Verfahren nach einem der Ansprüche 1 bis 9,
    dadurch gekennzeichnet, daß im Bereich der Übergänge zwischen den einzelnen Bandabschnitten ein Gradient aus Dickenänderung zu Bandlänge von höchstens 1:40 erzeugt wird.    Method according to one of claims 1 to 9,
    characterized in that in the region of the transitions between the individual strip sections, a gradient of thickness change to strip length of at most 1:40 is generated.
    EP04012217A 2003-05-22 2004-05-24 Method for manufacturing tubes and profiles Expired - Lifetime EP1479458B1 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    DE10323694A DE10323694A1 (en) 2003-05-22 2003-05-22 Method for producing pipes and profiles
    DE10323694 2003-05-22

    Publications (3)

    Publication Number Publication Date
    EP1479458A2 true EP1479458A2 (en) 2004-11-24
    EP1479458A3 EP1479458A3 (en) 2004-12-01
    EP1479458B1 EP1479458B1 (en) 2007-08-08

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    Country Status (6)

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    US (1) US7107682B2 (en)
    EP (1) EP1479458B1 (en)
    JP (1) JP4173118B2 (en)
    AT (1) ATE369216T1 (en)
    DE (2) DE10323694A1 (en)
    ES (1) ES2291772T3 (en)

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    EP1835199A3 (en) * 2006-03-14 2007-11-07 Muhr und Bender KG Spring leg pipe made of flexibly rolled sheet metal
    DE102011051057A1 (en) 2011-06-14 2012-09-06 Muhr Und Bender Kg Method for manufacturing tube for exhaust systems of motor vehicles, involves generating regions of higher thickness and other regions of lower thickness in longitudinal direction of strip material
    CN111015082A (en) * 2019-11-06 2020-04-17 武汉钢铁江北集团冷弯型钢有限公司 Production method of cold-bending rectangular steel pipe with high surface quality

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    DE102004017343A1 (en) * 2004-04-06 2005-11-03 Muhr Und Bender Kg Method for producing profiles with a longitudinally variable cross section
    DE102004023885A1 (en) * 2004-05-12 2005-12-08 Muhr Und Bender Kg Flexible rolling of light metals
    DE102005011764A1 (en) * 2005-03-11 2006-09-14 Muhr Und Bender Kg Tubes with integrated flange, in particular of flexibly rolled material, for chassis and body structural parts
    EP2417026B1 (en) 2009-04-08 2016-07-13 C&D Zodiac, Inc. Tubular body component of a vehicle seat frame
    US8356506B2 (en) * 2011-02-25 2013-01-22 Szuba Consulting, Inc. Method of forming industrial housings
    US9528327B1 (en) 2011-09-23 2016-12-27 Global Tubing Llc Coiled tubing optimized for long, horizontal completions
    JP6269613B2 (en) * 2015-08-05 2018-01-31 トヨタ自動車株式会社 Body frame structure and manufacturing method thereof
    DE102016102707A1 (en) * 2016-02-16 2017-08-17 Recaro Aircraft Seating Gmbh & Co. Kg Aircraft seat device
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    Also Published As

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    EP1479458A3 (en) 2004-12-01
    US20050015959A1 (en) 2005-01-27
    EP1479458B1 (en) 2007-08-08
    DE502004004551D1 (en) 2007-09-20
    DE10323694A1 (en) 2005-01-27
    ATE369216T1 (en) 2007-08-15
    ES2291772T3 (en) 2008-03-01
    JP4173118B2 (en) 2008-10-29
    US7107682B2 (en) 2006-09-19
    JP2004344979A (en) 2004-12-09

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