EP0703017B1 - Verfahren zur Herstellung eines längsnahtgeschweissten Metallrohres - Google Patents

Verfahren zur Herstellung eines längsnahtgeschweissten Metallrohres Download PDF

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Publication number
EP0703017B1
EP0703017B1 EP95114295A EP95114295A EP0703017B1 EP 0703017 B1 EP0703017 B1 EP 0703017B1 EP 95114295 A EP95114295 A EP 95114295A EP 95114295 A EP95114295 A EP 95114295A EP 0703017 B1 EP0703017 B1 EP 0703017B1
Authority
EP
European Patent Office
Prior art keywords
pipe
tube
process according
metal
welded
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
EP95114295A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0703017A3 (de
EP0703017A2 (de
Inventor
Gerhard Dr.-Ing. Ziemek
Harry Staschewski
Klaus Porcher
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 Deutschland GmbH
Original Assignee
Alcatel Kabel AG and Co
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 Alcatel Kabel AG and Co filed Critical Alcatel Kabel AG and Co
Publication of EP0703017A2 publication Critical patent/EP0703017A2/de
Publication of EP0703017A3 publication Critical patent/EP0703017A3/de
Application granted granted Critical
Publication of EP0703017B1 publication Critical patent/EP0703017B1/de
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
    • 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
    • B21C37/0822—Guiding or aligning the edges of the bent sheet

Definitions

  • the invention relates to a method for producing a longitudinally welded metal pipe (see e.g. JP-A-60 044 126) with an outer diameter from 1 to 6 mm, in which a metal band of one The supply spool is pulled off and made into a by a molding tool Shaped tube with longitudinal slot and the longitudinal slot of the tube is welded by means of a laser welding device.
  • metal pipes in the specified diameter range from a metal band, which formed into a slotted tube and its longitudinal slot with a Laser is welded to manufacture.
  • the metal band e.g. on Stainless steel band is made by a first molding tool, which consists of several pairs of form rollers, gradually increases formed a tube with a longitudinal slot.
  • a second Forming tool which also consists of several pairs of form rollers exists, the tube with a longitudinal slot becomes a tube with abutting band edges.
  • the form rolls of the second mold only grasp the Outer surface of the pipe. Behind the second mold a pair of rollers is provided which the slot tube in a predetermined distance from the focus of one Laser welding device leads.
  • the welded pipe gets into a cooling pipe with great play, in which the weld seam is intensively cooled with argon.
  • the welded metal pipe then goes into a drawing die, in which it is reduced in diameter.
  • the metal tape from the supply spool and through the One uses molds and pulls through the drawing die driven trigger disk around which the metal tube with a Wrap around 180 °.
  • the trigger disk has a V groove on the circumference, into which the Metal pipe is pressed in, so that a sufficient Tractive force is applied.
  • This can lead to a oval deformation of the metal pipe.
  • the side Alignment of the longitudinal slot in relation to the laser beam done by the top rollers of the second mold, which have projections running in the circumferential direction, which dip into the slotted tube and guide the band edges.
  • the invention has for its object the generic Process to improve that with this pipes great length i.e. of more than 3000 m, without welding defects can be produced.
  • the tools through which the metal pipe is passed will ensure that the strip edges exactly against each other are aligned and thus a flawless butt seam can be produced.
  • the second tool also holds the belt edges after welding together, making a particularly intense Cooling the weld is not necessary. This can Argon can be saved.
  • the tools also guarantee in particular simple way that both the lateral alignment as well the height alignment of the longitudinal seam to the laser beam or Focus is optimal, so that no readjustment of the Laser beam position is necessary during manufacturing.
  • the jaw puller ensures a twist-proof guidance of the metal pipe under the Spot weld because the clamping jaws firmly grip the pipe.
  • the tube is through a uniform from the first and the second tool formed tool led.
  • the laser beam is through a Recess in the tool on the seam to be welded directed.
  • the weld area is free, so that good cooling is possible.
  • the metal strip becomes attached to its tube before being formed Long edges trimmed so that "virgin” Belt edges are present and therefore welding defects Contamination can be avoided. Trimming is done advantageously with roller shears that are driven. There Considerable when trimming as well as pipe forming Contact forces occur, it must be feared that some Metals such as Aluminum or stainless steel to the "Eat" tools. To prevent this eating, the metal strip is wetted with a liquid lubricant. In the simplest way, wetting is achieved in that the metal band passed between two strips of felt that are constantly soaked with the lubricant. The Lubricant also ensures that the Metal pipe is avoided in the area of the guide tool.
  • the area of the welding spot is covered with a protective gas preferably flushed helium. In addition to the cooling effect achieved that no tarnishing in the area of the weld occur.
  • the welded metal pipe is advantageously behind first clamping jaw trigger reduced in diameter and that in Diameter-reduced pipe is made of a clamping jaw second jaw pull deducted.
  • the tube can be in one Train can be reduced by about 15 to 18% in diameter.
  • the line speed can be compared to the Welding speed can be increased.
  • Another advantage is that the dimension of the final product largely independent of the dimensions of the welded Rohres can be selected.
  • the method according to the invention is particularly suitable for Manufacture of fiber optic cables. To this end are inserted into the open slot tube before the welding point or more optical fibers introduced. With such cables it is advantageous to put a petroleum jelly in the metal tube to fill in to those sensitive to moisture To protect optical fibers.
  • the optical waveguide is used in a particularly advantageous manner inserted into the metal using a thin tube, which is the earliest behind the Releases welding spot.
  • the tube has the task of sensitive fiber optic cable in front of the weld to protect radiated heat. This protection works especially good if the petroleum jelly is inserted into the Metal tube is filled, which consists of the tube and a the second tube is formed from copper and surrounds the tube becomes.
  • the petroleum jelly gets behind the earliest Spot weld in the metal pipe.
  • This is expediently inner first tube also made of copper and is longer than the outer tube. It should end between the first and the second collet trigger, whereas the end of the outer tube in the area of the first jaw pull is located. Both tubes are outside the metal tube fixed.
  • the petroleum jelly is pressure controlled in one Quantity poured into the metal tube, the the between the Optical fiber and the inner wall of the metal tube fills the cavity. Through the flowing Petroleum jelly dissipates heat, so that the inside of the Tube optical fibers are protected.
  • the cross section of the second tube is at least in the area deformed below the welding point so that the Optical fiber tubes against the longitudinal seam opposite area of the outer tube becomes. This will cause the greatest possible distance between the Weld seam and the optical fiber in the welding spot area achieved.
  • the outer tube made of copper and with it the inner tube can be within a certain during manufacturing Area to be moved. This may be necessary if deposits in one place of the copper tube have formed.
  • Such an excess length can be achieved if that Optical fiber and containing the petroleum jelly Metal pipe with at least one turn on a trigger disk is wound up and then lightly pulled onto a Supply spool is wound and if the metal tube between either by the first jaw pull, the Pipe reduction tool or the second jaw puller formed fixed point and the trigger plate by a value stretched between 2 and 8 ⁇ and the elastic Elongation on the trigger disc is canceled.
  • the Tube 1 shows a perspective view of a part a tube manufactured according to the teaching of the invention.
  • the Tube 1 has a longitudinal weld 1a.
  • a preferred one Field of application for such longitudinally welded pipes 1 is the protective cover of an optical cable.
  • Inside the tube 1 then there are one or more optical fibers 2.
  • the Free space between the optical fibers 2 and the metal tube 1 can be filled with petroleum jelly to make one To prevent longitudinal water migration.
  • the number of Optical waveguide 2 is usually between six and twenty in exceptional cases up to forty.
  • the Optical fibers 2 have a greater length than that Metal tube 1, so run wave, spiral or sinusoidal in the metal tube 1. The excess length is usually in about 3 ⁇ .
  • the wall thickness 5 of the metal tube is z. B. 0.2 mm while its outer diameter is 3.5 mm. these are typical data for an optical cable, which instead of a Wire is arranged in a line rope.
  • As a material stainless steel is preferred for the metal tube 1.
  • FIG. 2 shows a side view of a device for Implementation of the method according to the invention.
  • a tape 5 becomes continuous from a supply reel 4 withdrawn and fed to a molding device 6, in which the Band 5 is formed into a tube with a longitudinal slot. part this molding device 6 is an unspecified one Edging device in which the band 5 exactly on the required width is cut.
  • the shaping device 6 still consists of several unspecified Form roller sets.
  • the longitudinal slot of the molded tube is made closed by means of a laser welding device 7.
  • the Welding device 7 provides a first jaw trigger 8, the from a large number of pairs of clamping jaws encompassing the tube consists of an endless chain.
  • Behind the first clamping jaw trigger 8 is a pipe reducing device 9, e.g. a drawing die arranged, in which the Diameter of the tube is reduced.
  • a second Clamping jaw trigger 10 is behind the pipe reducing device 9 arranged, which engages the drawn tube and this pulls through the drawing die.
  • the withdrawal speed of the second jaw trigger 10 is opposite the Pull-off speed of the first jaw pull-off 8 in Dependence on the sag of the pipe between the drawing die and the first jaw trigger 8 regulated.
  • the finished pipe can then be wound up on a rewinder 12.
  • a driven Trigger disk 11 is located on the circumferential surface of the tube with several turns.
  • the trigger plate 11 is with a pull-off speed, which is slightly faster than the withdrawal speed of the second Clamp jaw trigger 10 is.
  • the rewinder 12 winds the tube 13 with a light pull.
  • At 14 is a drain device for a variety of Optical waveguides 2 designated with a variety of Coils 15 is fitted, on which the optical waveguide 2 are wound up.
  • the optical fibers 2 are withdrawn from the coils 15 and inserted into the still open pipe in front of the welding device. Protects the sensitive optical waveguide 2 not shown stationary metal tube in the Slotted tube through the interior of which the optical waveguide 2 be passed through.
  • the metal tube gives that Optical waveguide 2 at the earliest behind the welding device 7 free.
  • the metal tube is in one of another Surround metal tubes. By the one of the two Metal tube formed gap is under pressure Petroleum jelly filled into the tube. So that Optical waveguide 2 in the metal tube 1 with an excess length are present, the metal tube 1 is continuously between the second jaw trigger 10, the jaw pairs Grip metal pipe 1 firmly and through the pipe reduction Apply resulting deformation forces, and the Trigger disk 11 elastically deformed, i.e. stretched.
  • the elastic deformation is caused by a force F that the metal tube 1 between the second jaw trigger 10 and the trigger plate 11 deflects.
  • This is weight 16 reached, which is connected to the metal pipe 1 e.g. by means of a Roll 17 is attached.
  • the force F i.e. the weight 16 determines the amount of deflection and thus the amount of stretch.
  • Figures 3 to 5 show a top view and two sections the guidance of the metal pipe in the area of Welding device.
  • the guide 18 for the metal tube 19 consists of two halves 18a and 18b, which each have an adjacent surface Have groove 20 with a radius of curvature that the Radius of curvature of the metal tube 19 corresponds.
  • the two Grooves 20 thus form an essentially circular guide for the metal tube 19.
  • the guide 18 consists of a steel alloy, the compared to the preferred material stainless steel has excellent sliding properties.
  • a recess 21 is provided, in the area of which Laser beam onto the longitudinal seam 19a of the metal tube 19 is directed and welded.
  • a gap 22 closes between the halves 18a and 18b on, which leaves the weld 19b free and thus a Allows heat dissipation.
  • Figure 4 shows a section along the line A - B, i.e. through the entrance area of the tour 18.
  • the tube 23 for the optical waveguide 2 as well as the tube 24 for the petroleum jelly.
  • the tube 24 is provided with an indentation 24a which the tube 23 from the longitudinal seam 19a or Weld 19 is kept away.
  • Both the tube 23 and also the tube 24 are thin-walled copper tubes that both the petroleum jelly and the optical fibers Protect excessive heating in the welding area.
  • For the Tubes 23 and 24 are one way of longitudinal displacement provided in the metal tube 19.
  • Figure 5 shows a section through the guide along the Line C-D, i.e. in the exit area of the guide. Here is the gap 22 can be clearly seen.
  • Figure 6 shows a section through a pair of jaws 8a Jaw trigger 8, which clamp the metal tube 19 firmly.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Laser Beam Processing (AREA)
  • Heat Treatment Of Articles (AREA)
  • Metal Extraction Processes (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Coating With Molten Metal (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)
  • Arc Welding In General (AREA)
  • Forging (AREA)
  • Butt Welding And Welding Of Specific Article (AREA)
EP95114295A 1994-09-24 1995-09-12 Verfahren zur Herstellung eines längsnahtgeschweissten Metallrohres Expired - Lifetime EP0703017B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4434134A DE4434134A1 (de) 1994-09-24 1994-09-24 Verfahren zur Herstellung eines längsnahtgeschweißten Metallrohres
DE4434134 1994-09-24

Publications (3)

Publication Number Publication Date
EP0703017A2 EP0703017A2 (de) 1996-03-27
EP0703017A3 EP0703017A3 (de) 1996-11-13
EP0703017B1 true EP0703017B1 (de) 2000-04-19

Family

ID=6529082

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95114295A Expired - Lifetime EP0703017B1 (de) 1994-09-24 1995-09-12 Verfahren zur Herstellung eines längsnahtgeschweissten Metallrohres

Country Status (15)

Country Link
US (1) US5613631A (el)
EP (1) EP0703017B1 (el)
JP (1) JP3828599B2 (el)
KR (1) KR960010109A (el)
CN (1) CN1068533C (el)
AT (1) ATE191868T1 (el)
AU (1) AU686443B2 (el)
CA (1) CA2158911A1 (el)
DE (2) DE4434134A1 (el)
DK (1) DK0703017T3 (el)
ES (1) ES2145192T3 (el)
FI (1) FI110997B (el)
GR (1) GR3033892T3 (el)
NO (1) NO953752L (el)
RU (1) RU2139159C1 (el)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2644311A1 (de) 2012-03-27 2013-10-02 Nexans Verfahren zum Schweißen mittels eines Lasers
EP3213830A1 (de) 2016-03-02 2017-09-06 Nexans Verfahren zur herstellung eines rohres aus metall

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DE4434133A1 (de) * 1994-09-24 1996-03-28 Kabelmetal Electro Gmbh Verfahren zur Herstellung eines optischen Kabels aus einem Metallrohr
FR2725530B1 (fr) * 1994-10-07 1996-11-22 Alcatel Submarcom Ensemble de protection contre l'echauffement interne d'un tube metallique contenant au moins une fibre optique et procede de mise en oeuvre
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DE19816998A1 (de) * 1998-04-17 1999-10-21 Alcatel Sa Verfahren zur Herstellung eines optischen Kabels
DE19825423A1 (de) * 1998-06-06 1999-12-09 Alcatel Sa Vorrichtung zur Herstellung eines optischen Kabels
DE10049283A1 (de) * 2000-10-05 2002-04-11 Hueck Folien Gmbh & Co Kg Verfahren und Vorrichtung zur Herstellung einer zylindrischen Prägeform
DE10106195A1 (de) * 2001-02-10 2002-08-14 Nexans France S A Verfahren zur Herstellung längsnahtgeschweißter Rohre
US6688513B2 (en) 2000-10-20 2004-02-10 Nexans Process for producing longitudinally welded tubes
DE10329424B4 (de) * 2003-07-01 2005-04-28 Thyssenkrupp Stahl Ag Verfahren zum Herstellen eines längsgeschlitzten Hohlprofils mit mehreren, im Querschnitt verschiedenen Längsabschnitten aus einer ebenen Blechplatine
NO20041392D0 (no) * 2004-04-02 2004-04-02 Nexans Optisk kabelenhet og fremgangsmate for fremstilling derav
EP1595610B1 (de) * 2004-05-07 2012-02-29 Nexans Verfahren zur kontinuierlichen Herstellung von längsnahtgeschweissten metallischen Röhrchen
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CA2630084A1 (en) * 2007-04-30 2008-10-30 Mark Andreychuk Coiled tubing with retainer for conduit
US9194512B2 (en) 2007-04-30 2015-11-24 Mark Andreychuk Coiled tubing with heat resistant conduit
WO2009033314A1 (fr) * 2007-09-11 2009-03-19 Fushi International (Dalian) Bimetallic Cable Co., Ltd Dispositif stable pour réalisation de cordons de soudure
CN103796787B (zh) * 2011-07-22 2016-10-12 福特全球技术公司 用于将焊接元件焊接到对应部件上的方法
CN102303202A (zh) * 2011-08-08 2012-01-04 江苏金长江环保汽摩消声器有限公司 消声器管的加工方法
US11344975B2 (en) * 2015-04-09 2022-05-31 Siemens Energy, Inc. Optically conductive filler for laser processing
CN106569307A (zh) * 2016-11-03 2017-04-19 江苏中天科技股份有限公司 一种光缆纵包钢带或铝带自动焊接装置用斜向移动装置
CN109909301A (zh) * 2019-03-08 2019-06-21 贺云坤 齿痕轧制机及使用齿痕轧制机制作内螺纹金属管的方法
EP3797891B1 (de) * 2019-09-30 2023-08-02 Nexans Verfahren zur kontinuierlichen herstellung abschnittsweise gewellter, dünnwandiger hohlprofile kleiner durchmesser aus ne-metallen

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2644311A1 (de) 2012-03-27 2013-10-02 Nexans Verfahren zum Schweißen mittels eines Lasers
EP3213830A1 (de) 2016-03-02 2017-09-06 Nexans Verfahren zur herstellung eines rohres aus metall

Also Published As

Publication number Publication date
FI954503A0 (fi) 1995-09-22
CN1128685A (zh) 1996-08-14
DE4434134A1 (de) 1996-03-28
EP0703017A3 (de) 1996-11-13
DK0703017T3 (da) 2000-07-10
ATE191868T1 (de) 2000-05-15
AU3281995A (en) 1996-04-04
NO953752L (no) 1996-03-25
CA2158911A1 (en) 1996-03-25
ES2145192T3 (es) 2000-07-01
GR3033892T3 (en) 2000-11-30
DE59508191D1 (de) 2000-05-25
FI110997B (fi) 2003-05-15
JPH08192222A (ja) 1996-07-30
AU686443B2 (en) 1998-02-05
JP3828599B2 (ja) 2006-10-04
EP0703017A2 (de) 1996-03-27
NO953752D0 (no) 1995-09-22
US5613631A (en) 1997-03-25
CN1068533C (zh) 2001-07-18
FI954503A (fi) 1996-03-25
KR960010109A (ko) 1996-04-20
RU2139159C1 (ru) 1999-10-10

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