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EP1121991B1 - Method for manufacturing metal pipes - Google Patents

Method for manufacturing metal pipes Download PDF

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Publication number
EP1121991B1
EP1121991B1 EP00400311A EP00400311A EP1121991B1 EP 1121991 B1 EP1121991 B1 EP 1121991B1 EP 00400311 A EP00400311 A EP 00400311A EP 00400311 A EP00400311 A EP 00400311A EP 1121991 B1 EP1121991 B1 EP 1121991B1
Authority
EP
European Patent Office
Prior art keywords
rollers
forming
metal band
metal
form rollers
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
EP00400311A
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German (de)
French (fr)
Other versions
EP1121991A1 (en
Inventor
Friedrich Dipl.-Ing. Harten
Michael Meyer
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
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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
Priority to DK00400311T priority Critical patent/DK1121991T3/en
Priority to ES00400311T priority patent/ES2184682T3/en
Priority to AT00400311T priority patent/ATE229386T1/en
Priority to DE50000912T priority patent/DE50000912D1/en
Priority to EP00400311A priority patent/EP1121991B1/en
Application filed by Nexans SA filed Critical Nexans SA
Priority to US09/771,635 priority patent/US6513699B2/en
Priority to JP2001024554A priority patent/JP2001246421A/en
Publication of EP1121991A1 publication Critical patent/EP1121991A1/en
Application granted granted Critical
Publication of EP1121991B1 publication Critical patent/EP1121991B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B21C37/08—Making tubes with welded or soldered seams
    • 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
    • B21C3/00—Profiling tools for metal drawing; Combinations of dies and mandrels
    • B21C3/02—Dies; Selection of material therefor; Cleaning thereof
    • B21C3/08—Dies; Selection of material therefor; Cleaning thereof with section defined by rollers, balls, or the like

Definitions

  • the invention relates to a method and an apparatus for producing Metal pipes according to the preamble of claim 1 and claim 3, (see e.g. US-A-3,260,099).
  • the strip edges to be welded are free of grease and oxide and on the other others the strip edges are guided cleanly and exactly during the welding process butt against each other at the same height.
  • the band edges of the trimmed degreased metal strip immediately before forming into a slotted tube.
  • Forming tools made of steel have proven themselves for metal strips made of steel and copper, which consist of pairs of form rollers or form rollers.
  • the metal band will be there gradually deformed into a slotted tube between the form rollers or form rollers.
  • the disadvantage of this known device is the fact that by attacking the Brushing device, the surface of the form rollers or form rollers additionally stressed is removed and not only the cold-welded particles. This causes an additional one Wear on the form rollers or form rollers.
  • the present invention is therefore based on the object, the described To avoid disadvantages and to provide a method and an apparatus in which cold welding of the tools is prevented from the outset.
  • the main advantage of the invention is that the extremely high Hardness of the surface of the form rollers or form rollers the coefficient of friction between the belt and the form roller or the form roller is significantly reduced.
  • the attainable hardness is five times higher than the hardness of conventional titanium nitride layers. It will achieved a coefficient of friction of well below 0.1.
  • FIGS. 1 to 3 Exemplary embodiments explained in more detail.
  • TOG welding arc welding under protective gas
  • the first three form stages 4, 5 and 6 each consist of an upper form roller 4a, 5a and 6a and a lower form roller 4b, 5b and 6b, between which the Aluminum strip 1 is gradually converted into the tube shape.
  • a vertical one Pair of form rollers 7 and a self-contained form ring 8 complete the Molding device 2.
  • rollers 4a, 4b, 5a, 5b, 6a and 6b are suitably made of steel.
  • the Rollers 4a, 5a, 5b, 6a and 6b can, however, be made of plastic, e.g. B. polyethylene, polyamide etc. exist.
  • the roller 4b must always be made of steel, since this is the strongest is claimed.
  • the shaping rollers 4a, 4b, 5a, 5b, 6a and 6b have if they are made of steel, a surface hardness of more than 100 GPa. This extremely high hardness is due to the incorporation of carbon atoms in the crystal lattice of the steel of the forming roller. The process developed for this is published in the magazine " MO metal surface "Carl Hanser Verlag 50th year 4/96 released.
  • FIG. 2 shows a view of the first molding stage 4 with the molding rollers 4a and 4b, between which the edge areas of the unspecified metal strip are extreme be strongly deformed.
  • the hardened surface of the form rollers 4a and 4b is shown in dashed lines and designated 9.
  • FIG. 3 shows a section through a Turkish head that consists of the four rollers 11 a consists.
  • the surface of the rollers also has a hardness of more than 100 GPa.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Metal Extraction Processes (AREA)
  • Forging (AREA)
  • Butt Welding And Welding Of Specific Article (AREA)

Abstract

A process for the production of metal pipes is described in which a thin-walled metal band inclined toward cold spots is gradually formed into a slotted pipe, the longitudinal edges lying flush against one another are welded to one another, and the welded pipe is reduced in its diameter. The forming of the metal band into the slotted pipe is done by opposing metal forming rollers or forming cylinders cooperating pairwise. The forming rollers or forming cylinders guide the metal band to be deformed in its edge area with rolling friction between them. Therein the forming and guiding of the metal band is done with forming rollers and/or forming cylinders and the reduction with rollers whose surface hardness is greater than 100 GPa.

Description

Die Erfindung betrifft ein Verfahren und eine Vorrichtung zur Herstellung von Metallrohren nach dem Oberbegriff des Anspruchs 1 und des Anspruchs 3, (siehe z.B. US-A-3 260 099).The invention relates to a method and an apparatus for producing Metal pipes according to the preamble of claim 1 and claim 3, (see e.g. US-A-3,260,099).

Aus dem Fachprospekt "Uniwema-Maschine und Zubehör" der Firma Kabel- und Metallwerke ist ein Verfahren zur Herstellung von dünnwandigen Metallrohren bekannt, bei welchem ein Metallband zu einem Schlitzrohr geformt, längsnahtverschweißt und ggfs. anschließend im selben Arbeitsgang mit einer ring- oder schraubenlinienförmigen Wellung versehen wird. Mit Hilfe dieses Verfahrens können auf wirtschaftlicher Basis unbegrenzte Längen von Rohren mit geringem Gewicht und - im Fall von gewellten Rohren - mit hoher Quersteifigkeit hergestellt werden.From the technical brochure "Uniwema machine and accessories" from the company Kabel- und Metallwerke is known for producing thin-walled metal pipes, in which a metal band is formed into a slotted tube, longitudinally welded and if necessary, then in the same operation with an annular or helical shape Corrugation is provided. Using this procedure can be done on an economic basis unlimited lengths of pipes with low weight and - in the case of corrugated Pipes - can be manufactured with high transverse rigidity.

Für die Erzielung einer einwandfreien Schweißnaht ist es von entscheidender Bedeutung, daß zum einen die zu verschweißenden Bandkanten fett- und oxidfrei sind und zum anderen die Bandkanten sauber geführt und während des Schweißvorgangs exakt stumpf und in gleicher Höhe aneinanderliegen. Dazu werden die Bandkanten des entfetteten Metallbandes unmittelbar vor dem Formen zum Schlitzrohr besäumt. Darüber hinaus ist der Verformung des Metallbandes zu dem Schlitzrohr Beachtung zu schenken.To achieve a flawless weld, it is crucial that on the one hand the strip edges to be welded are free of grease and oxide and on the other others the strip edges are guided cleanly and exactly during the welding process butt against each other at the same height. For this, the band edges of the trimmed degreased metal strip immediately before forming into a slotted tube. About that In addition, attention should be paid to the deformation of the metal strip to the slotted tube.

Für Metallbänder aus Stahl und Kupfer haben sich Formwerkzeuge aus Stahl bewährt, die aus Formrollen- bzw. Formwalzenpaaren bestehen. Das Metallband wird dabei zwischen den Formrollen bzw. Formwalzen allmählich zum Schlitzrohr verformt. Forming tools made of steel have proven themselves for metal strips made of steel and copper, which consist of pairs of form rollers or form rollers. The metal band will be there gradually deformed into a slotted tube between the form rollers or form rollers.

Für Bänder aus Metallen, die zum Kaltverschweißen neigen, wie z. B. Aluminium, Aluminiumlegierungen, rostfreie Stähle, Niob, Titan u. a., werden Formwerkzeuge aus Kunststoff verwendet. Deren Nachteil liegt jedoch in einer geringen Standzeit. Die Verwendung von Formwerkzeugen aus Stahl haben den Nachteil, daß Kaltaufschweißungen an den Formrollen bzw. Formwalzen entstehen, die sich mehr und mehr aufbauen, die Geometrie der Formwerkzeuge verändern, was schließlich zu einer unvollkommenen Rohrformung und damit zu einer schlechten Schweißnaht führt. Diese Kaltverschweißung tritt verstärkt an den Stellen auf, an denen eine starke Verformung des Metallbandes erfolgt. Bei dem beschriebenen "Uniwema"-Verfahren ist dies die erste Formstufe, in welcher den Bandkantenbereichen ein Krümmungsradius erteilt wird, welcher in dem fertigen Schlitzrohr vorliegt.For strips made of metal that tend to be cold welded, e.g. B. aluminum, Aluminum alloys, stainless steels, niobium, titanium and the like. a., molds are made Plastic used. However, their disadvantage is a short service life. The Use of steel molds have the disadvantage that Cold welds occur on the form rollers or form rollers, which are more and build more, change the geometry of the molds, which eventually becomes one imperfect pipe formation and thus leads to a poor weld. This Cold welding occurs increasingly in those places where there is severe deformation of the metal strip. This is the first in the "Uniwema" process described Form stage in which the band edge areas are given a radius of curvature, which is in the finished slotted tube.

Zur Lösung dieses Problems ist es aus der DE-U-94 03 594 bekannt, daß an der dem Metallband abgekehrten Oberfläche der unteren Formrolle oder Formwalze zumindest der ersten Formstufe, wo die Verformung am größten ist, eine Bürsteinrichtung angreift, welche die Oberfläche der Formrolle bzw. Formwalze blank hält.To solve this problem, it is known from DE-U-94 03 594 that at the Metal strip facing away from the lower form roller or form roller at least the first molding stage, where the deformation is greatest, attacks a brush device, which keeps the surface of the form roller or form roller bare.

Der Nachteil dieser bekannten Vorrichtung ist darin zu sehen, daß durch den Angriff der Bürsteinrichtung, die Oberfläche der Formrollen bzw. Formwalzen zusätzlich beansprucht wird und nicht nur die kaltverschweißten Partikel entfernt. Dadurch tritt ein zusätzlicher Verschleiß der Formrollen bzw. Formwalzen auf.The disadvantage of this known device is the fact that by attacking the Brushing device, the surface of the form rollers or form rollers additionally stressed is removed and not only the cold-welded particles. This causes an additional one Wear on the form rollers or form rollers.

Ebenfalls verschleißen die Bürsten selbst und müssen ausgewechselt werden, was zu einer Unterbrechung der Fertigung führt. Darüber hinaus ist der Schmutzanfall sehr hoch, wodurch auch der Schweißprozeß gestört wird. Ein ganz entscheidender Nachteil ist, daß bei Verwendung von Bändern aus Aluminium es zu einer Aluminiumstaubexplosion kommen kann.The brushes themselves also wear out and have to be replaced, which leads to an interruption in production. In addition, the amount of dirt is very high, which also disrupts the welding process. A very important disadvantage is that when aluminum strips are used, it becomes a Aluminum dust explosion can come.

Wenn das geschweißte Rohr in seinem Durchmesser reduziert werden muß, tritt das gleiche Problem der Kaltverschweißung auch an diesem Werkzeug auf, da man bestrebt ist, die Reduzierung in einem Arbeitsschritt durchzuführen. If the diameter of the welded pipe has to be reduced, this occurs same problem of cold welding also on this tool, since one strives is to carry out the reduction in one work step.

Der vorliegenden Erfindung liegt von daher die Aufgabe zugrunde, die geschilderten Nachteile zu vermeiden und ein Verfahren bzw. eine Vorrichtung bereitzustellen, bei dem eine Kaltverschweißung der Werkzeuge von vornherein unterbunden wird.The present invention is therefore based on the object, the described To avoid disadvantages and to provide a method and an apparatus in which cold welding of the tools is prevented from the outset.

Diese Aufgabe wird durch die im Kennzeichen der Ansprüche 1 und 3 erfaßten Merkmale gelöst.This task is covered by the characterizing part of claims 1 and 3 Features solved.

Der wesentliche Vorteil der Erfindung ist darin zu sehen, daß durch die extrem hohe Härte der Oberfläche der Formwalzen bzw. Formrollen der Reibwert zwischen dem Band und der Formrolle bzw. der Formwalze deutlich verringert wird. Die erreichbare Härte liegt um das Fünffache höher als die Härte herkömmlicher Titannitridschichten. Es wird ein Reibwert von deutlich unter 0,1 erreicht.The main advantage of the invention is that the extremely high Hardness of the surface of the form rollers or form rollers the coefficient of friction between the belt and the form roller or the form roller is significantly reduced. The attainable hardness is five times higher than the hardness of conventional titanium nitride layers. It will achieved a coefficient of friction of well below 0.1.

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

Die Erfindung ist anhand der in den Figuren 1 bis 3 schematisch dargestellten Ausführungsbeispiele näher erläutert.The invention is illustrated schematically in FIGS. 1 to 3 Exemplary embodiments explained in more detail.

Das von einem nicht dargestellten Ablaufbock abgezogene Metallband 1, z. B. ein Aluminiumband von 0,25 mm Wanddicke und einer Bandbreite von ca. 20 mm wird in einer Formeinrichtung 2 in mehreren Formstufen zu einem Schlitzrohr 3 geformt und unmittelbar hinter der letzten Formstufe mittels Lichtbogenschweißung unter Schutzgas (WIG-Schweißung) oder mittels Laser zu einem längsnahtgeschweißten Rohr verarbeitet.The metal strip 1, z. B. a Aluminum tape with a wall thickness of 0.25 mm and a width of approx. 20 mm is in a molding device 2 is formed into a slotted tube 3 in several molding stages and directly behind the last form stage by means of arc welding under protective gas (TIG welding) or processed into a longitudinally welded tube using a laser.

Die ersten drei Formstufen 4, 5 und 6 bestehen jeweils aus einer oberen Formrolle 4a, 5a und 6a sowie einer unteren Formrolle 4b, 5b und 6b, zwischen denen das Aluminiumband 1 allmählich in die Rohrform überführt wird. Ein vertikal gelagertes Formrollenpaar 7 und ein in sich geschlossener Formring 8 vervollständigen die Formeinrichtung 2. Hinter einer Schweißeinrichtung 10 wird das Rohr 3 einem Türkenkopf 11 zugeführt, der den Außendurchmesser des Rohres 3 verringert.The first three form stages 4, 5 and 6 each consist of an upper form roller 4a, 5a and 6a and a lower form roller 4b, 5b and 6b, between which the Aluminum strip 1 is gradually converted into the tube shape. A vertical one Pair of form rollers 7 and a self-contained form ring 8 complete the Molding device 2. Behind a welding device 10, the tube 3 is one Turk head 11 fed, which reduces the outer diameter of the tube 3.

Bei dieser Einrichtung treten die höchsten Drücke in der ersten Formstufe 4 auf, da hier den Bandkanten der Krümmungsradius des fertigen Schlitzrohres 3 erteilt wird. Dazu ist es erforderlich, einen kleineren Krümmungsradius zu wählen, da der elastische Anteil an der Verformung hinter der ersten Formstufe 4 wieder verlorengeht. Bei den erforderlichen hohen Drücken kommt es zu einer Kaltverschweißung, und zwar ganz verstärkt an den Stellen der unteren Formrolle 4b, an welchen die Bandkanten auf die Formrolle 4b auftreffen. An diesen Stellen lagert sich Aluminium an.With this device, the highest pressures occur in the first mold stage 4, since here the band edges of the radius of curvature of the finished slotted tube 3 is given. Is to it is necessary to choose a smaller radius of curvature because of the elastic portion the deformation behind the first form stage 4 is lost again. Both required high pressures, there is a cold welding, and indeed reinforced at the locations of the lower form roller 4b, at which the band edges on the Hit form roller 4b. Aluminum accumulates at these points.

Ähnlich hohe Drücke treten bei den Rollen des Türkenkopfes auf. Hinzu kommt noch, daß bei einem Türkenkopf über den Umfang gesehen unterschiedliche Geschwindigkeiten auftreten, die zu einer Erhöhung der Reibung führen, dies insbesondere dort, wo die Reduzierung ohne eine Schmierung des durchlaufenden Rohres durchgeführt wird.Similar high pressures occur with the rollers of the Turkish head. Additionally, that seen with a Turkish head over the circumference different Speeds occur that lead to an increase in friction, this especially where the reduction without lubrication of the continuous Rohres is carried out.

Die Formrollen 4a, 4b, 5a, 5b, 6a und 6b bestehen zweckmäßigerweise aus Stahl. Die Rollen 4a, 5a, 5b, 6a und 6b können jedoch aus Kunststoff, z. B. Polyethylen, Polyamid etc. bestehen. Die Rolle 4b muß in jedem Fall aus Stahl bestehen, da diese am stärksten beansprucht ist.The form rollers 4a, 4b, 5a, 5b, 6a and 6b are suitably made of steel. The Rollers 4a, 5a, 5b, 6a and 6b can, however, be made of plastic, e.g. B. polyethylene, polyamide etc. exist. The roller 4b must always be made of steel, since this is the strongest is claimed.

Gemäß der Lehre der Erfindung besitzen die Formrollen 4a, 4b, 5a, 5b, 6a und 6b, wenn sie denn aus Stahl bestehen, eine Oberflächenhärte von mehr als 100 GPa. Diese extrem hohe Härte wird durch Einlagerung von Kohlenstoffatomen in das Kristallgitter des Stahls der Formrolle erzielt. Das hierfür entwickelte Verfahren ist in der Zeitschrift " MO Metalloberfläche " Carl Hanser Verlag 50. Jahrgang 4/96 veröffentlicht.According to the teaching of the invention, the shaping rollers 4a, 4b, 5a, 5b, 6a and 6b have if they are made of steel, a surface hardness of more than 100 GPa. This extremely high hardness is due to the incorporation of carbon atoms in the crystal lattice of the steel of the forming roller. The process developed for this is published in the magazine " MO metal surface "Carl Hanser Verlag 50th year 4/96 released.

Die Figur 2 zeigt eine Ansicht der ersten Formstufe 4 mit den Formrollen 4a und 4b, zwischen denen die Randbereiche des nicht näher bezeichneten Metallbandes extrem stark verformt werden. Die aufgehärtete Oberfläche der Formrollen 4a und 4b ist gestrichelt dargestellt und mit 9 bezeichnet.FIG. 2 shows a view of the first molding stage 4 with the molding rollers 4a and 4b, between which the edge areas of the unspecified metal strip are extreme be strongly deformed. The hardened surface of the form rollers 4a and 4b is shown in dashed lines and designated 9.

Die Figur 3 zeigt einen Schnitt durch einen Türkenkopf, der aus den vier Rollen 11 a besteht. Die Oberfläche der Rollen weist ebenfalls eine Härte von mehr als 100 GPa auf.FIG. 3 shows a section through a Turkish head that consists of the four rollers 11 a consists. The surface of the rollers also has a hardness of more than 100 GPa.

Claims (4)

  1. A method for manufacturing metal tubes wherein a thin-walled metal band (1) with a tendency for cold-welding is gradually formed into a slotted tube (3), the rough, level longitudinal edges are welded together, and the diameter of the welded tube is reduced, wherein the metal band is formed into a slotted tube by pairs of counteracting form rollers (4a, 4b; 5a, 5b; 6a, 6b) made of metal and the form rollers guide the edges of the metal band to be formed with rolling friction characterized in that the forming and guiding process of the metal band is done by form rollers (4a, 4b; 5a, 5b; 6a, 6b) and reduction is done by rollers with a surface hardness of more than 100 GPa.
  2. A method according to claim 1 characterized in that additional carbon atoms are integrated in the surface of the form rollers, creating a diamond-like structure of high hardness on the surface.
  3. A device for manufacturing metal tubes consisting of a form device gradually forming a thin-walled metal band (1) with a tendency for cold-welding into a slotted tube (3), a welding device welding the longitudinal edges of the slotted tube, and a device reducing the diameter of the tube, wherein the form device consists of counteracting pairs of form rollers (4a, 4b; 5a, 5b; 6a, 6b) made of metal and the form rollers guide the edges of the metal band with rolling friction characterized in that the form rollers (4a, 4b; 5a, 5b; 6a, 6b) have a surface hardness of more than 100 GPa and the device for reducing the tube diameter is a so-called Turk's head, the rollers of which also have a surface hardness of more than 100 GPa.
  4. A device according to claim 3 characterized in that additional carbon atoms are integrated in the surface of the form rollers, creating a diamond-like structure of high hardness on the surface.
EP00400311A 2000-02-01 2000-02-01 Method for manufacturing metal pipes Expired - Lifetime EP1121991B1 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
ES00400311T ES2184682T3 (en) 2000-02-01 2000-02-01 METHOD FOR MANUFACTURING METAL PIPES.
AT00400311T ATE229386T1 (en) 2000-02-01 2000-02-01 METHOD FOR PRODUCING METAL TUBES
DE50000912T DE50000912D1 (en) 2000-02-01 2000-02-01 Process for the production of metal pipes
EP00400311A EP1121991B1 (en) 2000-02-01 2000-02-01 Method for manufacturing metal pipes
DK00400311T DK1121991T3 (en) 2000-02-01 2000-02-01 Method of making metal pipes
US09/771,635 US6513699B2 (en) 2000-02-01 2001-01-30 Process for the production of metal pipes
JP2001024554A JP2001246421A (en) 2000-02-01 2001-01-31 Metal tube manufacturing method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP00400311A EP1121991B1 (en) 2000-02-01 2000-02-01 Method for manufacturing metal pipes

Publications (2)

Publication Number Publication Date
EP1121991A1 EP1121991A1 (en) 2001-08-08
EP1121991B1 true EP1121991B1 (en) 2002-12-11

Family

ID=8173532

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00400311A Expired - Lifetime EP1121991B1 (en) 2000-02-01 2000-02-01 Method for manufacturing metal pipes

Country Status (7)

Country Link
US (1) US6513699B2 (en)
EP (1) EP1121991B1 (en)
JP (1) JP2001246421A (en)
AT (1) ATE229386T1 (en)
DE (1) DE50000912D1 (en)
DK (1) DK1121991T3 (en)
ES (1) ES2184682T3 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040250404A1 (en) * 2003-01-14 2004-12-16 Cripsey Timothy J. Process for press forming metal tubes
CN108895213A (en) * 2018-05-30 2018-11-27 浙江康盛股份有限公司 A kind of ultra-thin tube and its processing method
EP3797890B1 (en) 2019-09-30 2024-03-27 Nexans Method for the production of thin-walled hollow profiles with small diameters made from non-ferrous metals
EP3797891B1 (en) * 2019-09-30 2023-08-02 Nexans Method for the continuous production of thin-walled hollow profiles with small diameters, corrugated in sections and made from non-ferrous metals

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3260099A (en) * 1964-07-28 1966-07-12 Frank E Elge Tube forming machine
US3349832A (en) * 1964-07-31 1967-10-31 Simplex Wire & Cable Co Method of forming sheathed conductor
US3368379A (en) * 1964-09-17 1968-02-13 Simplex Wire & Cable Co Tube closing device
AT327140B (en) * 1974-05-20 1976-01-12 Plansee Metallwerk ROLLERS EQUIPPED WITH CARBIDE OR COMPLETE FROM CARBIDE, AND THE PROCESS FOR THEIR PRODUCTION
JP2842720B2 (en) * 1991-11-29 1999-01-06 京セラ株式会社 Die for wire drawing and manufacturing method thereof
JP3382968B2 (en) * 1992-06-12 2003-03-04 三菱アルミニウム株式会社 Forming roll for pipe production, pipe production method, and ERW pipe
JPH0890092A (en) * 1994-09-19 1996-04-09 Nanotetsuku Kk Lumibricant free drawing die, and method thereof
JPH1044140A (en) * 1996-07-31 1998-02-17 Kyocera Corp Processing rollers and wire saws

Also Published As

Publication number Publication date
ES2184682T3 (en) 2003-04-16
EP1121991A1 (en) 2001-08-08
US6513699B2 (en) 2003-02-04
ATE229386T1 (en) 2002-12-15
DK1121991T3 (en) 2003-03-31
DE50000912D1 (en) 2003-01-23
US20010042773A1 (en) 2001-11-22
JP2001246421A (en) 2001-09-11

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