EP1304176A2 - 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

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Publication number
EP1304176A2
EP1304176A2 EP02292398A EP02292398A EP1304176A2 EP 1304176 A2 EP1304176 A2 EP 1304176A2 EP 02292398 A EP02292398 A EP 02292398A EP 02292398 A EP02292398 A EP 02292398A EP 1304176 A2 EP1304176 A2 EP 1304176A2
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EP
European Patent Office
Prior art keywords
tube
lubricant
metal
pipe
continuous production
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.)
Withdrawn
Application number
EP02292398A
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German (de)
French (fr)
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EP1304176A3 (en
Inventor
Christian Dipl.-Ing. Dr. Frohne
Klaus Porcher
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Nexans SA
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Nexans SA
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Filing date
Publication date
Application filed by Nexans SA filed Critical Nexans SA
Publication of EP1304176A2 publication Critical patent/EP1304176A2/en
Publication of EP1304176A3 publication Critical patent/EP1304176A3/en
Withdrawn legal-status Critical Current

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    • 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

Definitions

  • the present invention relates to a method according to the preamble of Claim 1.
  • a metal strip located on a spool is removed, if necessary, cleaned, formed into a slotted tube on a molding table in several molding stages and the Longitudinal slot of the slotted tube welded in a welding station.
  • Behind the The metal pipe is welded by a so-called Collet trigger taken with the metal band and the metal tube transported at a constant speed.
  • Collets which are mounted on two endless roller chains, the pipe. In the Collets are used for clamping jaws that exactly match the pipe diameter are adjusted.
  • the welded tube is then usually wound onto a cable spool.
  • the invention is therefore based on the object of specifying a method with which metal pipes of great length can be produced, which in one subsequent operation both in the outer diameter and in the Wall thickness can be reduced easily.
  • the main advantage of the invention is that it is simple manages the inner surface with a precisely metered amount of a lubricant to coat, which makes the subsequent drawing process easy d. H. without Damage to the inner surface of the pipe and thus without the risk of Tearing off the tube behind the die can be done.
  • the invention is based on a schematically illustrated embodiment explained in more detail.
  • a metal strip 2 is made, for example, of austenitic Steel stripped and fed a form roller set 3, in which the Metal strip 2 is gradually formed into a tube 4 with a longitudinal slot.
  • the Longitudinal slot is preferably one with a welding device 5 Laser welding device closed.
  • the welded tube 6 is behind the Welding device 5 captured by a collet trigger 7, the metal strip 2, the slotted tube 4 and the welded tube 6 through the manufacturing plant draws.
  • the collet trigger is from the German designation 11 64 355 known.
  • the welded tube 6 is then wound onto a cable drum 8.
  • the described method is limited to pipes with an outside diameter of at most 2 mm.
  • a lubricant is removed from a reservoir 10 in by means of a lance 9 the slotted tube 4 or the metal tube 6 introduced.
  • the end of the lance 9 lies particularly advantageously behind the welding device, so that the lubricant with regard to its lubricating properties by the Welding heat is not affected.
  • the lubricant can be discontinuously through the lance 9 in the still open tube 4 or the welded tube 6 can be introduced. At the subsequent The lubricant is distributed over the cable drum 8 or spool the entire inner surface of the tube 6.
  • the lubricant can be applied by spraying a thin film onto the Inner surface of the tube 6 can be applied behind the welding device 5.
  • longitudinally welded pipes can be great length d. H. up to 20,000 m or more are made from which through a subsequent drawing process tubes with a much smaller Outside diameter and a much smaller wall thickness can be produced.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Extraction Processes (AREA)
  • Laser Beam Processing (AREA)
  • Butt Welding And Welding Of Specific Article (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Manufacturing Of Electric Cables (AREA)
  • Coating With Molten Metal (AREA)

Abstract

Process for continuous production of a straight bead-welded metal pipe comprises pulling a metal sheet (2) from a reservoir, gradually forming a pipe with an open longitudinal slit, and soldering or welding the longitudinal slit. A lubricant is introduced into the open seam pipe (4). <??>Preferred Features: A lubricating oil is introduced dropwise into the open seam pipe behind the weld point using a lance (9). The longitudinal slit is closed by laser welding.

Description

Die vorliegende Erfindung betrifft ein Verfahren nach dem Oberbegriff des Anspruchs 1.The present invention relates to a method according to the preamble of Claim 1.

Die kontinuierliche Herstellung längsnahtgeschweißter Metallrohre - glatt oder gewellt - ist seit langem bekannt.The continuous production of longitudinally welded metal pipes - smooth or curled - has been known for a long time.

Aus dem "Fachprospekt" Uniwema-Maschinen und Zubehör der Firma kabelmetal electro GmbH ist ein Verfahren bekannt, mit dessen Hilfe Metallrohre mit einem Durchmesser von 2 bis 400 mm und einer Wanddicke von 0,05 bis 4,0 mm in nahezu unendlichen Längen herstellbar sind.From the "technical brochure" Uniwema machines and accessories from the company kabelmetal electro GmbH is known for a method with the help of metal pipes with a Diameters from 2 to 400 mm and a wall thickness from 0.05 to 4.0 mm in almost infinite lengths can be produced.

Dabei wird ein auf einer Spule befindliches Metallband abgezogen ggfs gereinigt, auf einem Formtisch in mehreren Formstufen zu einem Schlitzrohr geformt und der Längsschlitz des Schlitzrohres in einer Schweißstation verschweißt. Hinter der Schweißeinrichtung wird das Metallrohr von einem sogenannten Spannzangenabzug gefaßt, der das Metallband und das Metallrohr mit gleichmäßiger Geschwindigkeit transportiert. Zu diesem Zweck umschließen Spannzangen, die auf zwei endlosen Rollenketten montiert sind, das Rohr. In die Spannzangen sind Spannbacken eingesetzt, die genau dem Rohrdurchmesser angepaßt sind. A metal strip located on a spool is removed, if necessary, cleaned, formed into a slotted tube on a molding table in several molding stages and the Longitudinal slot of the slotted tube welded in a welding station. Behind the The metal pipe is welded by a so-called Collet trigger taken with the metal band and the metal tube transported at a constant speed. Enclose for this purpose Collets, which are mounted on two endless roller chains, the pipe. In the Collets are used for clamping jaws that exactly match the pipe diameter are adjusted.

Das geschweißte Rohr wird dann üblicherweise auf eine Kabelspule aufgewickelt.The welded tube is then usually wound onto a cable spool.

Bei diesem bekannten Verfahren besteht das Problem, daß aus Gründen der Verformung des Metallbandes zum Schlitzrohr wie auch der Verschweißung der Längskanten Rohre mit einem Außendurchmesser von weniger als 2 mm nicht mehr herstellbar sind. Um Rohre mit einem kleineren Durchmesser herstellen zu können, müssen die Rohre in einer oder mehreren Stufen heruntergezogen werden. Dabei werden die Rohre durch eine Matrize hindurchgezogen, deren Innendurchmesser kleiner ist als der Außendurchmesser des zu ziehenden Rohres. Soll zusätzlich die Wanddicke des Rohres beim Ziehvorgang reduziert werden, muß ein Dorn in das Rohr eingebracht werden, dessen Außendurchmesser größer ist als der Innendurchmesser der Matrize.In this known method there is the problem that for reasons of Deformation of the metal band to the slotted tube as well as the welding of the Longitudinal pipes no longer with an outside diameter of less than 2 mm are producible. In order to be able to produce pipes with a smaller diameter, the pipes must be pulled down in one or more stages. there the tubes are pulled through a die, the inside diameter is smaller than the outside diameter of the pipe to be drawn. Should additionally Wall thickness of the tube to be reduced during the drawing process, a mandrel must be in the Pipe are introduced, whose outer diameter is larger than that Inner diameter of the die.

Um die Reibung zwischen der Rohrwandung und den Verformungswerkzeugen - Matrize und Dorn - zu verringern, muß ein Schmiermittel zugeführt werden. Die Schmierung des Rohres von außen ist nahezu problemlos. Schwierig ist es jedoch, die erforderliche Menge des Schmiermittels in das Rohrinnere zu bringen, wenn es sich um große zu ziehende Rohrlängen handelt.The friction between the pipe wall and the deformation tools - To reduce die and mandrel - a lubricant must be added. The Lubrication of the pipe from the outside is almost no problem. However, it is difficult bring the required amount of lubricant into the interior of the pipe when it is are large lengths of pipe to be drawn.

Der Erfindung liegt von daher die Aufgabe zugrunde ein Verfahren anzugeben, mit welchem Metallrohre großer Länge herstellbar sind, welche in einem nachfolgenden Arbeitsgang sowohl im Außendurchmesser als auch in der Wanddicke problemlos reduziert werden können.The invention is therefore based on the object of specifying a method with which metal pipes of great length can be produced, which in one subsequent operation both in the outer diameter and in the Wall thickness can be reduced easily.

Diese Aufgabe wird durch das im Kennzeichen des Anspruchs 1 Erfaßte gelöst.This object is achieved by what is covered in the characterizing part of claim 1.

Weitere vorteilhafte Ausgestaltungen der Erfindung sind in den Unteransprüchen erfaßt.Further advantageous embodiments of the invention are in the subclaims detected.

Der wesentliche Vorteil der Erfindung ist darin zu sehen, daß es in einfacher Weise gelingt, die Innenoberfläche mit einer genau dosierten Menge eines Schmiermittels zu beschichten, wodurch der nachfolgende Ziehvorgang problemlos d. h. ohne Beschädigung der inneren Oberfläche des Rohres und damit ohne die Gefahr eines Abreißens des Rohres hinter der Matrize durchgeführt werden kann.The main advantage of the invention is that it is simple manages the inner surface with a precisely metered amount of a lubricant to coat, which makes the subsequent drawing process easy d. H. without Damage to the inner surface of the pipe and thus without the risk of Tearing off the tube behind the die can be done.

Die Erfindung ist anhand eines schematisch dargestellten Ausführungsbeispiels näher erläutert.The invention is based on a schematically illustrated embodiment explained in more detail.

Von einer Vorratsspule 1 wird ein Metallband 2 beispielsweise aus austenitischem Stahl abgezogen und einem Formrollensatz 3 zugeführt, in welchem das Metallband 2 allmählich zu einem Rohr 4 mit Längsschlitz geformt wird. Der Längsschlitz wird mit einer Schweißeinrichtung 5 vorzugsweise einer Laserschweißeinrichtung geschlossen. Das geschweißte Rohr 6 wird hinter der Schweißeinrichtung 5 von einem Spannzangenabzug 7 gefaßt, der das Metallband 2, das Schlitzrohr 4 sowie das geschweißte Rohr 6 durch die Fertigungsanlage zieht. Der Spannzangenabzug ist aus der deutschen Auslegeschrift 11 64 355 bekannt.From a supply reel 1, a metal strip 2 is made, for example, of austenitic Steel stripped and fed a form roller set 3, in which the Metal strip 2 is gradually formed into a tube 4 with a longitudinal slot. The Longitudinal slot is preferably one with a welding device 5 Laser welding device closed. The welded tube 6 is behind the Welding device 5 captured by a collet trigger 7, the metal strip 2, the slotted tube 4 and the welded tube 6 through the manufacturing plant draws. The collet trigger is from the German designation 11 64 355 known.

Das geschweißte Rohr 6 wird anschließend auf eine Kabeltrommel 8 aufgewickelt.The welded tube 6 is then wound onto a cable drum 8.

Das beschriebene Verfahren ist begrenzt auf Rohre mit einem Außendurchmesser von höchstens 2 mm.The described method is limited to pipes with an outside diameter of at most 2 mm.

Es besteht Bedarf an Metallrohren mit einem Außendurchmesser von 0,2 mm und einer Wanddicke von 0,02 mm. Solche Metallrohre finden Verwendung bei der Herstellung von Injektionsnadeln.There is a need for metal pipes with an outer diameter of 0.2 mm and a wall thickness of 0.02 mm. Such metal pipes are used in the Production of hypodermic needles.

Um Metallrohre mit diesen Abmessungen herstellen zu können, müssen die nach dem beschriebenen Verfahren hergestellten längsnahtgeschweißten Rohre durch Ziehen in mehreren Schritten auf die gewünschten Abmessungen reduziert wurden.In order to be able to manufacture metal pipes with these dimensions, the longitudinally welded pipes produced by the method described Drag in several steps were reduced to the desired dimensions.

Um die längsnahtgeschweißten Rohre für die nachfolgenden Zieherparation geeignet zu machen, ist erfindungsgemäß vorgesehen, das Metallrohr 6 mit einem Schmiermittelfilm an seiner inneren Oberfläche zu versehen. Around the longitudinally welded tubes for the subsequent pull repair According to the invention, it is intended to make the metal tube 6 suitable To provide lubricant film on its inner surface.

Hierzu wird mittels einer Lanze 9 ein Schmiermittel aus einem Vorratsbehälter 10 in das Schlitzrohr 4 bzw. das Metallrohr 6 eingebracht.For this purpose, a lubricant is removed from a reservoir 10 in by means of a lance 9 the slotted tube 4 or the metal tube 6 introduced.

Mit besonderem Vorteil liegt das Ende der Lanze 9 hinter der Schweißeinrichtung, damit das Schmiermittel bezüglich seiner Schmiereigenschaften durch die Schweißhitze nicht beeinträchtigt wird.The end of the lance 9 lies particularly advantageously behind the welding device, so that the lubricant with regard to its lubricating properties by the Welding heat is not affected.

Das Schmiermittel kann durch die Lanze 9 diskontinuierlich in das noch offene Rohr 4 oder das geschweißte Rohr 6 eingebracht werden. Beim anschließenden Aufwickeln auf die Kabeltrommel 8 oder Spule verteilt sich das Schmiermittel über die gesamte innere Oberfläche des Rohres 6.The lubricant can be discontinuously through the lance 9 in the still open tube 4 or the welded tube 6 can be introduced. At the subsequent The lubricant is distributed over the cable drum 8 or spool the entire inner surface of the tube 6.

Alternativ kann das Schmiermittel durch Sprühen eines dünnen Filmes auf die Innenoberfläche des Rohres 6 hinter der Schweißeinrichtung 5 aufgebracht werden. Mit Hilfe des erfindungsgemäßen Verfahrens können längsnahtgeschweißte Rohre großer Länge d. h. bis zu 20.000 m oder mehr hergestellt werden, aus denen durch einen nachfolgenden Ziehvorgang Rohre mit einem wesentlich geringeren Außendurchmesser und einer wesentlich geringeren Wanddicke hergestellt werden.Alternatively, the lubricant can be applied by spraying a thin film onto the Inner surface of the tube 6 can be applied behind the welding device 5. With the help of the method according to the invention, longitudinally welded pipes can be great length d. H. up to 20,000 m or more are made from which through a subsequent drawing process tubes with a much smaller Outside diameter and a much smaller wall thickness can be produced.

Claims (7)

Verfahren zur kontinuierlichen Herstellung eines längsnahtgeschweißten Metallrohres, bei dem ein Metallband von einem Bandvorrat abgezogen, allmählich zu einem Rohr mit einem offenen Längsschlitz geformt und der Längsschlitz durch Löten oder Schweißen geschlossen wird, dadurch gekennzeichnet, daß in das noch offene Schlitzrohr ein Schmiermittel eingebracht wird.A process for the continuous production of a longitudinally welded metal tube, in which a metal strip is drawn from a strip supply, gradually formed into a tube with an open longitudinal slot and the longitudinal slot is closed by soldering or welding, characterized in that a lubricant is introduced into the still open slot tube. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß ein Schmieröl eingebracht wird.A method according to claim 1, characterized in that a lubricating oil is introduced. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß das Schmiermittel tropfenweise eingebracht wird.Method according to claim 1 or 2, characterized in that the lubricant is introduced dropwise. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß das Schmiermittel mittels einer Lanze hinter dem Schweißpunkt in das Metallrohr eingebracht wird.Method according to claim 1 or 2, characterized in that the lubricant is introduced into the metal tube by means of a lance behind the welding point. Verfahren nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß der Längsschlitz durch Laserschweißen geschlossen wird.Method according to one of claims 1 to 4, characterized in that the longitudinal slot is closed by laser welding. Verfahren nach einem der Ansprüche 1 bis 5, bei dem das geschweißte Rohr zu einem Ringbund gewickelt oder auf eine Spule aufgewickelt wird, dadurch gekennzeichnet, daß das Schmiermittel in einer solchen Menge in das noch offene Schlitzrohr eingebracht wird, daß nach dem Wickeln des Rohres die gesamte innere Oberfläche des Metallrohres mit Schmiermittel benetzt ist.Method according to one of claims 1 to 5, in which the welded tube is wound into an annular bundle or wound on a spool, characterized in that the lubricant is introduced into the open slot tube in such an amount that after winding the tube the entire inner surface of the metal tube is wetted with lubricant. Verfahren nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß in einem nächsten Arbeitsgang sowohl der Außendurchmesser als auch die Wanddicke des Metallrohres mittels eines Ziehprozesses unter Verwendung eines Dornes im Rohrinnern sowie einer Ziehmatrize verringert wird.Method according to one of claims 1 to 6, characterized in that in a next operation, both the outside diameter and the wall thickness of the metal tube are reduced by means of a drawing process using a mandrel in the tube interior and a drawing die.
EP02292398A 2001-10-20 2002-09-27 Method for the continuous production of longitudinally seam welded metal tubes Withdrawn EP1304176A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10151827A DE10151827A1 (en) 2001-10-20 2001-10-20 Process for the continuous production of a longitudinally welded metal tube
DE10151827 2001-10-20

Publications (2)

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EP1304176A2 true EP1304176A2 (en) 2003-04-23
EP1304176A3 EP1304176A3 (en) 2004-06-30

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EP02292398A Withdrawn EP1304176A3 (en) 2001-10-20 2002-09-27 Method for the continuous production of longitudinally seam welded metal tubes

Country Status (10)

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US (1) US6685082B2 (en)
EP (1) EP1304176A3 (en)
JP (1) JP2003181532A (en)
CN (1) CN1411923A (en)
BR (1) BR0204235A (en)
CA (1) CA2408886A1 (en)
DE (1) DE10151827A1 (en)
MX (1) MXPA02010335A (en)
MY (1) MY129193A (en)
SG (1) SG106103A1 (en)

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DE10119569B4 (en) * 2001-04-21 2010-02-25 "Alwag" Tunnelausbau Gesellschaft Mbh Device for chipless forming
DE10151827A1 (en) * 2001-10-20 2003-04-30 Nexans Process for the continuous production of a longitudinally welded metal tube
JP2003190282A (en) * 2001-12-27 2003-07-08 Terumo Corp Metal tubular body and its manufacturing method
DE502004005136D1 (en) * 2004-06-09 2007-11-15 Nexans Process for the continuous production of longitudinally welded metal tubes
DE102004053021A1 (en) 2004-11-03 2006-05-04 Nexans Method for determining the wall thickness of a metal pipe
US20060157539A1 (en) * 2005-01-19 2006-07-20 Dubois Jon D Hot reduced coil tubing
JP2009542444A (en) * 2006-07-07 2009-12-03 レヴワイヤーズ・エルエルシー Method and apparatus for making cored wire
US8993920B2 (en) * 2008-03-31 2015-03-31 Jfe Steel Corporation Method for producing a steel pipe using a high energy density beam
DE102011052258B4 (en) * 2011-07-28 2014-12-24 Benteler Deutschland Gmbh Apparatus and method for drawing longitudinally welded pipes

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Also Published As

Publication number Publication date
SG106103A1 (en) 2004-09-30
BR0204235A (en) 2003-09-16
MY129193A (en) 2007-03-30
MXPA02010335A (en) 2005-07-13
CN1411923A (en) 2003-04-23
US20030075588A1 (en) 2003-04-24
CA2408886A1 (en) 2003-04-20
DE10151827A1 (en) 2003-04-30
US6685082B2 (en) 2004-02-03
EP1304176A3 (en) 2004-06-30
JP2003181532A (en) 2003-07-02

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