EP1595610B1 - Method for the continuous production of longitudinally seam welded metal tubes - Google Patents

Method for the continuous production of longitudinally seam welded metal tubes Download PDF

Info

Publication number
EP1595610B1
EP1595610B1 EP04291191A EP04291191A EP1595610B1 EP 1595610 B1 EP1595610 B1 EP 1595610B1 EP 04291191 A EP04291191 A EP 04291191A EP 04291191 A EP04291191 A EP 04291191A EP 1595610 B1 EP1595610 B1 EP 1595610B1
Authority
EP
European Patent Office
Prior art keywords
tube
ring
edges
welded
forming tool
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Lifetime
Application number
EP04291191A
Other languages
German (de)
French (fr)
Other versions
EP1595610A1 (en
Inventor
Klaus Porcher
Bernd Grannenmann
Christian Dr. Frohne
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nexans SA
Original Assignee
Nexans SA
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 Nexans SA filed Critical Nexans SA
Priority to AT04291191T priority Critical patent/ATE547190T1/en
Priority to EP04291191A priority patent/EP1595610B1/en
Priority to CN200510067487.6A priority patent/CN1693004B/en
Publication of EP1595610A1 publication Critical patent/EP1595610A1/en
Application granted granted Critical
Publication of EP1595610B1 publication Critical patent/EP1595610B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • B21C37/08—Making tubes with welded or soldered seams
    • B21C37/0818—Manufacture of tubes by drawing of strip material through dies

Definitions

  • the invention relates to a method for producing longitudinally welded metallic tubes according to the preamble of claim 1, such a method is known from EP 299 123 A known.
  • a device for producing a longitudinally welded metal tube with an outer diameter of 1 to 6 mm is known.
  • a metal strip is withdrawn in a continuous mode of operation from a supply reel, formed by a mold consisting of several sets of molds forming a tube with a longitudinal slot, and the longitudinal slot welded.
  • the slit tube is passed through a tool which holds the band edges of the slotted tube together.
  • the tool consists of two halves which each have on their adjacent surface a groove with a radius of curvature corresponding to the outer radius of curvature of the slot tube.
  • the tool has a recess which allows access to the beam of a laser welding device for welding the longitudinal slot of the tube.
  • the welded tube passes behind the recess a second portion of the tool, which is intended to prevent springback of the strip edges in the still "soft" weld pool and to ensure rapid cooling of the weld.
  • a steel alloy is proposed as a material for the tool.
  • a device for producing a metallic tube comprising a forming device that transforms an elongated metal strip to the tube, and a welding device that welds the two strip edges of the tube together in the welding area.
  • a welding device that welds the two strip edges of the tube together in the welding area.
  • the welding area at least one cooled solid body is provided, which contacts the continuous tube outside for cooling.
  • the solid body has an opening which allows the passage of a laser beam for welding the longitudinal seam.
  • the invention has for its object to improve the known method to the extent that large lengths of metallic tubes are produced trouble-free.
  • the main advantage of the invention is the fact that by the arrangement of a ring of wear-resistant material in a water-cooled holder, the wear on the tool is so far reduced that lengths of several kilometers without interruption of production can be produced. This effect is exacerbated when the shape of the metal strip to the slotted tube takes place so that the slotted tube without springback of the band edges forms a nearly closed tube, so that the ring serves only to stabilize the closed tube.
  • the inventive method is advantageously used for the production of optical fiber cables, which have a plurality of optical waveguides in a closed metal tube.
  • FIGS. 1 and 2 schematically illustrated embodiments explained in more detail.
  • FIG. 1 Fig. 3 is a side view of part of an apparatus for making thin metal tubes.
  • a withdrawn from a tape supply no longer illustrated metal strip 1 is fed to a first forming roller group 2.
  • the metal strip 1 is a stainless steel strip which has been cut to a width of 3.1 to 21.5 mm, for example, by means of a trimming device (also not shown). Before the first forming roll group 2, the metal strip 1 can be easily wetted with a lubricant to reduce the friction during molding.
  • the first forming roll group 2 has two forming roll pairs 2a and 2b.
  • the form roller pair 2a In the form roller pair 2a, only the band edge regions are initially rounded.
  • the form roller pair 2b forms the metal strip 1 into a U-profile.
  • the U-shaped metal band 1 a is fed to a device 3, which has a guide tube 3a, which projects into the U-shaped metal strip 1 a and opens behind the weld point.
  • a guide tube 3a which projects into the U-shaped metal strip 1 a and opens behind the weld point.
  • a second forming roller group 4 which consists of a first pair of forming rollers 4a and a second pair of forming rollers 4b, the U-shaped metal strip 1a is formed into a slotted tube 1b having an extremely small slit width.
  • the slotted tube 1 b then passes into a tool 5, which on the basis of FIG. 2 will be described in more detail. Behind the tool 5 is located in the shortest possible distance, the laser welding device 6, in which the longitudinal slot is welded. At the finished optical cable 7 attacks a not shown trigger, behind which the cable 7 is then wound on a drum no longer shown.
  • the welded metal tube can be reduced in diameter as needed, stretched and be relieved cooled to produce an excess length of the optical waveguide in the metal tube.
  • FIG. 2 In the FIG. 2 is the tool 5 opposite FIG. 1 shown enlarged.
  • the slit tube 1 b is pulled through a diamond ring 8, whose inner diameter is almost equal to the outer diameter of the slotted tube 1 b.
  • the bore of the diamond ring 8 is almost cylindrical.
  • the diamond ring 8 is arranged in a socket 9, which has a channel system 14 for cooling the diamond ring 8.
  • the duct system 14 is fed by a feed 10 for cooling water.
  • the version 9 is arranged in a holder 13.
  • the tube emerging from the diamond ring 8 is surrounded by an annular nozzle 11 which blows a protective gas over the tube above the longitudinal slot of the tube in the direction of production.
  • the protective gas is supplied to the nozzle 11 via a line 12.
  • the shielding gas protects the weld area of the tube beyond the weld area.
  • the forming roller groups 2 and 4 take over the entire forming work in the deformation of the metal strip to a slotted tube with extremely narrow slot.
  • the closing and calming of the tube takes place through the diamond ring 8. This allows long service life of the diamond ring 8 even with hard materials for the metal strip.
  • An improvement in smoothness can also be achieved by taking care in the edge rounding in the first forming roller group 2 that the outer radius of curvature of the edge region is selected to be somewhat larger than half the inner diameter of the diamond ring 8.
  • tubes with an outer diameter of between 1 and 7 mm can be produced without errors in lengths of more than 100 km.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Laser Beam Processing (AREA)
  • Arc Welding In General (AREA)

Abstract

The machine to form a continuously welded metal tube has a feed for the metal strip to a water cooled die chamber (9). The die chamber has a diamond shaping former ring (8) to form the strip into a tube with a longitudinal slot. The slot is closed by a welding head to form a closed tube. An outlet for a shielding gas can be formed between the welder and the former ring.

Description

Die Erfindung betrifft ein Verfahren zur Herstellung von längsnahtgeschweißten metallischen Röhrchen nach dem Oberbegriff des Anspruchs 1, ein solches Verfahren ist aus der EP 299 123 A bekannt.The invention relates to a method for producing longitudinally welded metallic tubes according to the preamble of claim 1, such a method is known from EP 299 123 A known.

Aus der EP 0 703 017 B1 ist eine Vorrichtung zur Herstellung eines längsnahtgeschweißten Metallrohres mit einem Außendurchmesser von 1 bis 6 mm bekannt. Dabei wird ein Metallband in kontinuierlicher Arbeitsweise von einer Vorratsspule abgezogen, durch ein aus mehreren Formrollensätzen bestehendes Formwerkzeug zu einem Rohr mit Längsschlitz geformt, und der Längsschlitz verschweißt. Das Schlitzrohr wird durch ein Werkzeug hindurchgeführt, welches die Bandkanten des Schlitzrohres zusammenhält. Das Werkzeug besteht aus zwei Hälften, welche an ihrer angrenzenden Fläche jeweils eine Nut mit einem Krümmungsradius aufweisen, der dem äußeren Krümmungsradius des Schlitzrohres entspricht. Das Werkzeug weist eine Ausnehmung auf, welche einen Zutritt für den Strahl einer Laserschweißeinrichtung zum Verschweißen des Längsschlitzes des Rohres ermöglicht. Das geschweißte Rohr durchläuft hinter der Ausnehmung einen zweiten Bereich des Werkzeugs, welcher ein Rückfedern der Bandkanten in dem noch "weichen" Schweißbad verhindern und für eine schnelle Abkühlung der Schweißnaht sorgen soll. Als Material für das Werkzeug wird eine Stahllegierung vorgeschlagen.From the EP 0 703 017 B1 a device for producing a longitudinally welded metal tube with an outer diameter of 1 to 6 mm is known. In this case, a metal strip is withdrawn in a continuous mode of operation from a supply reel, formed by a mold consisting of several sets of molds forming a tube with a longitudinal slot, and the longitudinal slot welded. The slit tube is passed through a tool which holds the band edges of the slotted tube together. The tool consists of two halves which each have on their adjacent surface a groove with a radius of curvature corresponding to the outer radius of curvature of the slot tube. The tool has a recess which allows access to the beam of a laser welding device for welding the longitudinal slot of the tube. The welded tube passes behind the recess a second portion of the tool, which is intended to prevent springback of the strip edges in the still "soft" weld pool and to ensure rapid cooling of the weld. As a material for the tool, a steel alloy is proposed.

Bei dieser Vorrichtung hat sich gezeigt, daß sich große Längen von mehreren Hundert Kilometern nicht störungsfrei herstellen lassen. Der Grund hierfür liegt in einem hohen Verschleiß des Werkzeugs, der daraus resultiert, daß das geformte Schlitzrohr einen offenen Spalt aufweist, der erst im Werkzeug vollständig geschlossen wird.In this device has been shown that large lengths of several hundred kilometers can not be produced trouble-free. The reason for this is a high wear of the tool, which results from the fact that the shaped slot pipe has an open gap, which is only completely closed in the tool.

Aus der EP 0 927 090 B1 ist eine Vorrichtung zur Herstellung eines metallischen Röhrchens bekannt, mit einer Formvorrichtung, die ein langgestrecktes Metallband zu dem Röhrchen umformt, sowie einer Schweißvorrichtung, die die beiden Bandkanten des Röhrchens im Schweißbereich miteinander verschweißt. Im Schweißbereich ist mindestens ein gekühlter Festkörper vorgesehen, der das durchlaufende Röhrchen außen zur Kühlung kontaktiert. Im Schweißpunkt weist der Festkörper eine Öffnung auf, welche den Durchtritt für einen Laserstrahl zum Verschweißen der Längsnaht ermöglicht.From the EP 0 927 090 B1 For example, there is known a device for producing a metallic tube, comprising a forming device that transforms an elongated metal strip to the tube, and a welding device that welds the two strip edges of the tube together in the welding area. In the welding area, at least one cooled solid body is provided, which contacts the continuous tube outside for cooling. At the welding point, the solid body has an opening which allows the passage of a laser beam for welding the longitudinal seam.

Beiden bekannten Lösungen ist gemeinsam, daß insbesondere bei harten Metallen für das Röhrchen, wie z. B. Edelstahl, das Werkzeug bzw. der Festkörper einem hohen Verschleiß unterliegen, und eine störungsfreie Fertigung großer Längen nicht möglich ist.Both known solutions have in common that especially in hard metals for the tube, such as. As stainless steel, the tool or the solid subject to high wear, and trouble-free production of long lengths is not possible.

Aus der EP-A-1 230 995 ist ein Verfahren zur Herstellung löngsnahtverschweißter Rohre bekannt, bei welchen ein von einem Bandvorrat abgezogenes Metallband durch mehrere hintereinander angeordnete aus Diamant bestehende Ziehsteine mit sich in Fertigungsrichtung verringerndem Durchmesser hindurchgezogen und zu einem Rohr mit Längsschlitz geformt wird. Hinter dem letzten Ziehstein wird der Längsschlitz durch eine Laserschweißeinrichtung geschlossen. Vor dem ersten Ziehstein kann noch ein an den Bandkanten des Metallbandes angreifendes Rollenwerkzeug vorgesehen sein.From the EP-A-1 230 995 a method for producing loosely seam welded tubes is known in which a deducted from a strip supply metal strip is pulled through a plurality of successively arranged consisting of diamond dies with decreasing in the direction of production diameter and formed into a tube with a longitudinal slot. Behind the last die the longitudinal slot is closed by a laser welding device. Before the first die can still be provided on the band edges of the metal strip acting roller tool.

Aus der US-A-1 353 721 ist eine Vorrichtung zur Herstellung von geschweißten Metallrohren bekannt, bei welcher eine Matrize vorgesehen ist, welche in einem Wasserbehälter angeordnet ist.From the US-A-1 353 721 a device for the production of welded metal pipes is known in which a die is provided, which is arranged in a water tank.

Der Erfindung liegt die Aufgabe zugrunde, das bekannte Verfahren dahingehend zu verbessern, daß große Längen metallischer Röhrchen störungsfrei herstellbar sind.The invention has for its object to improve the known method to the extent that large lengths of metallic tubes are produced trouble-free.

Diese Aufgabe wird durch die im Anspruch 1 erfaßten Merkmale gelöst.This object is achieved by the features detected in claim 1.

Der wesentliche Vorteil der Erfindung ist darin zu sehen, daß durch die Anordnung eines Ringes aus verschleißfestem Material in einer wassergekühlten Halterung, der Verschleiß am Werkzeug so weit reduziert ist, daß Längen von mehreren Kilometern ohne Unterbrechung der Fertigung herstellbar sind. Diese Wirkung wird noch verstärkt, wenn die Formgebung des Metallbandes zum Schlitzrohr so erfolgt, daß das Schlitzrohr ohne Rückfederung der Bandkanten ein nahezu geschlossenes Rohr bildet, so daß der Ring lediglich zur Stabilisierung des geschlossenen Rohres dient.The main advantage of the invention is the fact that by the arrangement of a ring of wear-resistant material in a water-cooled holder, the wear on the tool is so far reduced that lengths of several kilometers without interruption of production can be produced. This effect is exacerbated when the shape of the metal strip to the slotted tube takes place so that the slotted tube without springback of the band edges forms a nearly closed tube, so that the ring serves only to stabilize the closed tube.

Das erfindungsgemäße Verfahren wird vorteilhafterweise zur Herstellung von Lichtwellenleiterkabeln eingesetzt, welche eine Vielzahl von Lichtwellenleiter in einem geschlossenen Metallröhrchen aufweisen.The inventive method is advantageously used for the production of optical fiber cables, which have a plurality of optical waveguides in a closed metal tube.

Die Erfindung ist anhand der in den Figuren 1 und 2 schematisch dargestellten Ausführungsbeispiele näher erläutert.The invention is based on in the FIGS. 1 and 2 schematically illustrated embodiments explained in more detail.

In der Figur 1 ist eine seitliche Ansicht eines Teiles einer Vorrichtung zur Herstellung von dünnen Metallröhrchen dargestellt.In the FIG. 1 Fig. 3 is a side view of part of an apparatus for making thin metal tubes.

Ein von einem nicht mehr dargestellten Bandvorrat abgezogenes Metallband 1 wird einer ersten Formrollengruppe 2 zugeführt. Bei dem Metallband 1 handelt es sich um ein Edelstahlband, welches beispielsweise mittels einer ebenfalls nicht mehr dargestellten Besäumeinrichtung auf eine Breite von 3,1 bis 21,5 mm geschnitten wurde. Vor der ersten Formrollengruppe 2 kann das Metallband 1 leicht mit einem Schmiermittel benetzt werden, um die Reibung während der Formgebung zu reduzieren.A withdrawn from a tape supply no longer illustrated metal strip 1 is fed to a first forming roller group 2. The metal strip 1 is a stainless steel strip which has been cut to a width of 3.1 to 21.5 mm, for example, by means of a trimming device (also not shown). Before the first forming roll group 2, the metal strip 1 can be easily wetted with a lubricant to reduce the friction during molding.

Die erste Formrollengruppe 2 weist zwei Formrollenpaare 2a und 2b auf.The first forming roll group 2 has two forming roll pairs 2a and 2b.

In dem Formrollenpaar 2a werden zunächst nur die Bandkantenbereiche gerundet. Das Formrollenpaar 2b formt das Metallband 1 zu einem U-Profil.In the form roller pair 2a, only the band edge regions are initially rounded. The form roller pair 2b forms the metal strip 1 into a U-profile.

Das U-förmig gebogene Metallband 1 a wird einer Vorrichtung 3 zugeführt, welche ein Führungsrohr 3a aufweist, das in das U-förmige Metallband 1 a hineinragt und hinter dem Schweißpunkt mündet. Mit Hilfe des Führungsrohres 3a können mehrere von nicht dargestellten Vorratsspulen abgezogene Lichtwellenleiter sowie eine plastische Masse in das Metallröhrchen eingebracht werden.The U-shaped metal band 1 a is fed to a device 3, which has a guide tube 3a, which projects into the U-shaped metal strip 1 a and opens behind the weld point. With the help of the guide tube 3a a plurality of unrepresented supply reels withdrawn optical waveguide and a plastic mass can be introduced into the metal tube.

In einer zweiten Formrollengruppe 4, welche aus einem ersten Formrollenpaar 4a und einem zweiten Formrollenpaar 4b besteht, wird das U-förmige Metallband 1 a zu einem Schlitzrohr 1 b mit extrem geringer Schlitzbreite geformt. Das Schlitzrohr 1 b gelangt dann in ein Werkzeug 5, welches anhand der Figur 2 näher beschrieben werden soll. Hinter dem Werkzeug 5 befindet sich in kürzest möglichem Abstand die Laserschweißvorrichtung 6, in welcher der Längsschlitz verschweißt wird. An dem fertigen optischen Kabel 7 greift ein nicht mehr dargestellter Abzug an, hinter dem das Kabel 7 dann auf eine nicht mehr dargestellte Trommel aufgewickelt wird. Das geschweißte Metallrohr kann je nach Bedarf im Durchmesser reduziert, gedehnt und abgekühlt entlastet werden, um eine Überlänge der Lichtwellenleiter in dem Metallrohr herzustellen.In a second forming roller group 4, which consists of a first pair of forming rollers 4a and a second pair of forming rollers 4b, the U-shaped metal strip 1a is formed into a slotted tube 1b having an extremely small slit width. The slotted tube 1 b then passes into a tool 5, which on the basis of FIG. 2 will be described in more detail. Behind the tool 5 is located in the shortest possible distance, the laser welding device 6, in which the longitudinal slot is welded. At the finished optical cable 7 attacks a not shown trigger, behind which the cable 7 is then wound on a drum no longer shown. The welded metal tube can be reduced in diameter as needed, stretched and be relieved cooled to produce an excess length of the optical waveguide in the metal tube.

In der Figur 2 ist das Werkzeug 5 gegenüber Figur 1 vergrößert dargestellt.In the FIG. 2 is the tool 5 opposite FIG. 1 shown enlarged.

Das Schlitzrohr 1 b wird durch einen Diamantring 8 gezogen, dessen Innendurchmesser nahezu gleich dem Außendurchmesser des Schlitzrohres 1 b ist. Die Bohrung des Diamantringes 8 ist nahezu zylindrisch. Der Diamantring 8 ist in einer Fassung 9 angeordnet, welche ein Kanalsystem 14 zur Kühlung des Diamantrings 8 aufweist. Das Kanalsystem 14 wird durch einen Zulauf 10 für Kühlwasser gespeist. Die Fassung 9 ist in einer Halterung 13 angeordnet.The slit tube 1 b is pulled through a diamond ring 8, whose inner diameter is almost equal to the outer diameter of the slotted tube 1 b. The bore of the diamond ring 8 is almost cylindrical. The diamond ring 8 is arranged in a socket 9, which has a channel system 14 for cooling the diamond ring 8. The duct system 14 is fed by a feed 10 for cooling water. The version 9 is arranged in a holder 13.

Das aus dem Diamantring 8 austretende Rohr ist von einer ringförmigen Düse 11 umgeben, die oberhalb des Längsschlitzes des Röhrchens ein Schutzgas in Fertigungsrichtung über das Röhrchen bläst. Das Schutzgas wird der Düse 11 über eine Leitung 12 zugeführt. Das Schutzgas schützt den Schweißnahtbereich des Röhrchens bis über den Schweißbereich hinaus.The tube emerging from the diamond ring 8 is surrounded by an annular nozzle 11 which blows a protective gas over the tube above the longitudinal slot of the tube in the direction of production. The protective gas is supplied to the nozzle 11 via a line 12. The shielding gas protects the weld area of the tube beyond the weld area.

Bei dem erfindungsgemäßen Verfahren übernehmen die Formrollengruppen 2 und 4 die gesamte Formarbeit bei der Verformung des Metallbandes zu einem Schlitzrohr mit extrem engem Schlitz. Das Schließen und Beruhigen des Rohres erfolgt durch den Diamantring 8. Dadurch sind hohe Standzeiten des Diamantringes 8 auch bei harten Werkstoffen für das Metallband möglich.In the method according to the invention, the forming roller groups 2 and 4 take over the entire forming work in the deformation of the metal strip to a slotted tube with extremely narrow slot. The closing and calming of the tube takes place through the diamond ring 8. This allows long service life of the diamond ring 8 even with hard materials for the metal strip.

Eine Verbesserung der Laufruhe kann auch dadurch erzielt werden, daß bei der Kantenrundung in der ersten Formrollengruppe 2 darauf geachtet wird, daß der äußere Krümmungsradius des Kantenbereichs etwas größer gewählt wird als der halbe innere Durchmesser des Diamantringes 8.An improvement in smoothness can also be achieved by taking care in the edge rounding in the first forming roller group 2 that the outer radius of curvature of the edge region is selected to be somewhat larger than half the inner diameter of the diamond ring 8.

Mit Hilfe des erfindungsgemäßen Verfahren können Röhrchen mit einem Außendurchmesser zwischen 1 und 7 mm in Längen von mehr als 100 km fehlerfrei hergestellt werden.With the aid of the method according to the invention, tubes with an outer diameter of between 1 and 7 mm can be produced without errors in lengths of more than 100 km.

In der Beschreibung sind für die Formrollengruppen 2 und 4 jeweils nur zwei Formrollenpaare angegeben. Falls es für die Verformung des Metallbandes erforderlich sein sollte, können selbstredend auch mehr als zwei Formrollenpaare für eine oder beide Formrollengruppen 2 und 4 vorgesehen werden.In the description, only two pairs of form rollers are specified for the form roller groups 2 and 4, respectively. If it should be necessary for the deformation of the metal strip, of course, more than two pairs of forming rollers for one or both forming roller groups 2 and 4 can be provided.

Claims (1)

  1. A method for the continuous manufacturing of a longitudinally welded metallic tube (7) with an outer diameter between 1 mm and 7 mm, by which a metallic ribbon (1) is drawn from spool and formed gradually in a forming tool (2,4) into a tube having a longitudinal extending slot, wherein the forming tool comprises several rollers (2a,2b,4a,4b), which at first provide roundings at the edges of the ribbon (1) and which then form the ribbon into an open tube with a U-like cross section and finally into a slotted tube having the longitudinally extending slot, by which the edges of the tube behind the forming tool are hold together by a working tool (5), by which the edges of the tube are welded by a laser welding device and by which the welded tube (7) is drawn by a pull-off capstan, characterized by the following features:
    a) the slotted tube passes behind the forming tool (2,4) a water-cooled casing (9) having a ring (8) of diamond,
    b) a protecting gas is blown to the slot of the slotted tube in the direction of production between the ring (8) and the welding point by use of a ring like nozzle and
    c) the metallic ribbon (1) is provided in the area of its edges with roundings having a bend radius which is between 0,05 mm and 0,5 mm greater than the radius of the opening of the ring (8).
EP04291191A 2004-05-07 2004-05-07 Method for the continuous production of longitudinally seam welded metal tubes Expired - Lifetime EP1595610B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AT04291191T ATE547190T1 (en) 2004-05-07 2004-05-07 METHOD FOR THE CONTINUOUS PRODUCTION OF LONGITUDINALLY WELDED METAL TUBES
EP04291191A EP1595610B1 (en) 2004-05-07 2004-05-07 Method for the continuous production of longitudinally seam welded metal tubes
CN200510067487.6A CN1693004B (en) 2004-05-07 2005-04-25 Device for the continuous production of longitudinally seam welded metal tubes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP04291191A EP1595610B1 (en) 2004-05-07 2004-05-07 Method for the continuous production of longitudinally seam welded metal tubes

Publications (2)

Publication Number Publication Date
EP1595610A1 EP1595610A1 (en) 2005-11-16
EP1595610B1 true EP1595610B1 (en) 2012-02-29

Family

ID=34931088

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04291191A Expired - Lifetime EP1595610B1 (en) 2004-05-07 2004-05-07 Method for the continuous production of longitudinally seam welded metal tubes

Country Status (3)

Country Link
EP (1) EP1595610B1 (en)
CN (1) CN1693004B (en)
AT (1) ATE547190T1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016106754A1 (en) * 2014-12-31 2016-07-07 深圳市大富方圆成型技术有限公司 Pipe forming machine and gas protection system thereof

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB132680A (en) * 1900-01-01
US1353721A (en) * 1919-09-30 1920-09-21 Chisholm Douglas Whimster Closing die or bell for welded tubes
DE596506C (en) * 1932-07-15 1934-05-03 Stahlwerke Roechling Buderus A Device for cooling set drawing dies
US2277339A (en) * 1940-04-18 1942-03-24 Carl V Luginbill Drawing die
EP0115441A3 (en) * 1983-01-28 1984-12-05 Olin Corporation Process and apparatus for fabricating tubular structures
FR2650081B1 (en) * 1989-07-24 1991-10-04 Foptica METHOD AND APPARATUS FOR MANUFACTURING OPTICAL MODULES
DE4434134A1 (en) * 1994-09-24 1996-03-28 Kabelmetal Electro Gmbh Process for producing a longitudinally welded metal tube
DE10106195A1 (en) * 2001-02-10 2002-08-14 Nexans France S A Process for the production of longitudinally welded pipes

Also Published As

Publication number Publication date
ATE547190T1 (en) 2012-03-15
CN1692999A (en) 2005-11-09
EP1595610A1 (en) 2005-11-16
CN1693004B (en) 2010-09-08

Similar Documents

Publication Publication Date Title
EP0703017B1 (en) Method for the production of longitudinally seam welded metal tubes
EP0313896B1 (en) Manufacturing method and device for manufacturing optical cables
EP0703478B1 (en) Method of manufacture of an optical cable from a metal tube
DE1957834C3 (en) Device for producing smooth, thin-walled tubes from a continuous sheet metal strip
EP0701878A1 (en) Device and method for manufacturing of tubes
DE2928120A1 (en) METHOD AND DEVICE FOR MANUFACTURING MOTOR VEHICLE EXHAUST PIPES
DE1107621B (en) Equipment for the continuous production of small-caliber and thin-walled seam tubes
DE2708458C2 (en) Device for joint extrusion of at least two composite profiles
DE2128115A1 (en) Method and device for the production of smooth tubes with thin or very thin wall thickness by welding
DE69601357T2 (en) AUTOMATIC DRAWING DEVICE
EP1595610B1 (en) Method for the continuous production of longitudinally seam welded metal tubes
DE2651812A1 (en) METHOD AND DEVICE FOR COLD FORMING OF LONG-DRAWN STEEL PIECES
DE19741934A1 (en) Upsetting device and upsetting method
DE3405641C2 (en)
EP0636432A1 (en) Method for the production of helically or annularly corrugated tubes
EP0962801B1 (en) Apparatus for optical cable manufacturing
EP1484123B1 (en) Method and apparatus for manufacturing a bent profile
DE3023507C2 (en)
EP0683032B1 (en) Apparatus for manufacturing coaxial conduit
EP1230995B1 (en) Procedure and device for the fabrication of tubes with longitudinally welded seam
DE10261632B4 (en) Process and rolling plant for the production of wire, bars or seamless tubes
DE69526125T2 (en) Method and device for manufacturing helical objects
WO2001081022A1 (en) Gilled pipe
EP1121991B1 (en) Method for manufacturing metal pipes
DE2203913A1 (en) METHOD AND DEVICE FOR COUPLING WIRE SPIDERS

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20040930

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL HR LT LV MK

AKX Designation fees paid

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: NEXANS

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: AT

Ref legal event code: REF

Ref document number: 547190

Country of ref document: AT

Kind code of ref document: T

Effective date: 20120315

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: GERMAN

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 502004013334

Country of ref document: DE

Effective date: 20120426

REG Reference to a national code

Ref country code: NL

Ref legal event code: VDEP

Effective date: 20120229

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20120229

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20120629

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20120229

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20120530

REG Reference to a national code

Ref country code: IE

Ref legal event code: FD4D

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20120229

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20120229

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20120229

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20120229

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20120229

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20120229

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20120229

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20120229

Ref country code: IE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20120229

BERE Be: lapsed

Owner name: NEXANS

Effective date: 20120531

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20120229

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20120531

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20120529

26N No opposition filed

Effective date: 20121130

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20120531

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20130131

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 502004013334

Country of ref document: DE

Effective date: 20121130

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20120529

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20120531

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20120529

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20120609

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: TR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20120229

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20120507

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: HU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20040507

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20150513

Year of fee payment: 12

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20160507

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20230519

Year of fee payment: 20

Ref country code: CH

Payment date: 20230605

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 20230522

Year of fee payment: 20

REG Reference to a national code

Ref country code: DE

Ref legal event code: R071

Ref document number: 502004013334

Country of ref document: DE

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

REG Reference to a national code

Ref country code: AT

Ref legal event code: MK07

Ref document number: 547190

Country of ref document: AT

Kind code of ref document: T

Effective date: 20240507