EP0016099A1 - Procede et installation de fabrication de tuyaux multicouches - Google Patents

Procede et installation de fabrication de tuyaux multicouches

Info

Publication number
EP0016099A1
EP0016099A1 EP79900786A EP79900786A EP0016099A1 EP 0016099 A1 EP0016099 A1 EP 0016099A1 EP 79900786 A EP79900786 A EP 79900786A EP 79900786 A EP79900786 A EP 79900786A EP 0016099 A1 EP0016099 A1 EP 0016099A1
Authority
EP
European Patent Office
Prior art keywords
tubular body
heating
heat treatment
pipe
heating stage
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Withdrawn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
EP79900786A
Other languages
German (de)
English (en)
Inventor
Hans-Ulrich Dietzel
Walter MÜFFKE
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.)
Mecano Bundy GmbH
Original Assignee
Mecano Bundy GmbH
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 Mecano Bundy GmbH filed Critical Mecano Bundy GmbH
Publication of EP0016099A1 publication Critical patent/EP0016099A1/fr
Withdrawn legal-status Critical Current

Links

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
    • B21C37/09—Making tubes with welded or soldered seams of coated strip material ; Making multi-wall tubes

Definitions

  • the invention relates to a method and a plant for the production of multilayer pipes, wherein a steel strip provided with a copper coating is formed into an endless multilayer pipe body by continuously advancing rolling transversely to the strip length axis and the pipe body is subjected to a continuous heat treatment in which the initially cold pipe body is heated to around 1370 K is heated and temporarily held at this soldering temperature, the layers of the tube body being soldered to one another by melting the copper coating.
  • Such a method is known from DE-PS 75 11 70, and according to it, multilayer pipes, so-called “bundy” pipes, have been produced for a long time, which are used in particular in the motor vehicle industry as brake line pipes.
  • the strip edges are first beveled by rolling in the production of multi-layer tubes. Then, in a first set of form rolls, a narrow strip is approximately lowered in the area of the later outer seam edge right-angled to serve as a stop and abutment for the curl that then begins from the other side of the belt. This bend is then removed in the last deformation process. This chamfering and the elimination of the chamfer lead to increased tensions in the chamfer area. So it is necessary to subject the newly formed tubular body to cold deformation in a corresponding set of rollers, also to give it a certain degree of stability.
  • This cold deformation brings about a certain strain hardening and stabilization of the shape of the tubular body, so that the tubular body can be subdivided into individual lengths, the individual lengths can be collected and finally fed together in lots to a continuous furnace in which the individual layers are soldered.
  • the object of the invention is to reduce the waste resulting from the aforementioned influences in the production of the Mehrla to reduce pipes, ie to improve the yield and to make the manufacturing process less sensitive.
  • the continuous production according to the invention ensures that the stable end. Strain hardening can be dispensed with. When rolling in, it is no longer necessary to pull over the mandrel as much. The number of mandrel changes is significantly reduced, the mandrel diameters can be stepped up and it is now easier to run tapes from different lots, even if they differ slightly in thickness, hardness and roughness.
  • Fig. 3 shows a plant for the production of multilayer pipes with a downstream stretch-reducing mill.
  • the plant shown in FIG. 1 for producing a multilayer pipe 2 from a metal strip 1 provided with a copper lining essentially consists of a strip store 3, a rolling device 4, a heating device 5, a heating device 6 and a cooling device 7. Behind the cooling device 7 is a Control device 8 and a device 10 are provided for winding the finished pipe.
  • the prefabricated pipe can also be disassembled into individual lengths via a separating device 9.
  • the separating device 9 is also used for cutting out pipe sections, which the control device 8 has recognized as deviating from a set standard.
  • the rolling device 4 consists of several roller sets 41, 42, 43, 4445, 46, which gradually form the steel strip 1 into a tubular body 12.
  • the heating device 5 contains roller conductors 51 and 52 which are connected to a transformer 53.
  • a further transformer 62 or a high-frequency generator is seen in the heating device 6, which feeds an induction coil 61.
  • the heating device includes a diffusion annealing furnace 63 which holds the temperature reached via the induction coil 61 for a while. If necessary, work is carried out under protective gas.
  • the system is operated as follows:
  • the steel strip 1 is fed from the strip storage device 3 to the rolling device 4, in which the roll sets 41 and 46 are used to form it into a multi-layer tubular body.
  • the tubular body 12 has approximately the shape shown in FIG. 2 with an inner layer 13 and an outer layer 14.
  • the inner layer 13 ends with a beveled edge 15, the outer layer 14 with a beveled edge 16.
  • the beveled Edges 15 and 16 overlap.
  • the tubular body 12 is heated to a temperature of about 1200 K and thus annealed without stress.
  • the shape of the tubular body would have been considerably stabilized and it would have been considerably more resistant to external mechanical influences.
  • the system shown shows that the tubular body 12 is now fed to a heating device in one pass, with induction heating to approximately 1370 K. This temperature can be maintained with a suitable arrangement and shielding until it enters the diffusion annealing furnace 63, until after the soldering has been carried out the finished tube runs into a cooling section 7 and is checked after leaving it.
  • a device 18 for forming a pipe loop and a stretch-reducing mill are connected downstream. If there is little space available for the diffusion annealing furnace 63 from Baluich conditions, which would have to be much longer in continuous operation per se than the batch-wise fed diffusion annealing furnaces used so far, the resulting reduction in production speed can thereby be largely compensated for. Now a multi-layer pipe larger diameter than can be produced in the known systems, the desired final diameter can be generated via the stretch-reducing mill.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Heat Treatment Of Articles (AREA)
  • General Induction Heating (AREA)
  • Metal Rolling (AREA)

Abstract

Selon un procede connu pour la fabrication de ces tuyaux qui sont utilises en particulier comme conduits de frein dans les vehicules a moteur, on enroule transversalement et de facon continue une bande d'acier munie d'un revetement de cuivre pour obtenir un tuyau multicouche sans fin qui est soumis ensuite a un traitement thermique. Selon ce traitement thermique en continu le tuyau froid est porte et maintenu a 1370 K. Le revetement de cuivre fond et les differentes couches du tuyau se soudent ensemble. La qualite du tuyau ainsi obtenu depend de plusieurs conditions qui sont difficiles a remplir; par exemple, ce procede exige une grande maitrise de la technique de production, des machines parfaitement reglees et une bande d'acier dont les tolerances d'epaisseur sont petites pour eviter des difficultes de fabrication considerables. Afin d'eviter trop de rebut dans la production, le traitement thermique du tuyau multicouche se fait en deux etapes. Immediatement apres la formation du tuyau et combine avec la premiere etape d'echauffement, on utilise une temperature de recuit finale de 1200 K pour eliminer les tensions et on obtient la soudure dans la seconde etape d'echauffement.
EP79900786A 1978-06-28 1980-01-31 Procede et installation de fabrication de tuyaux multicouches Withdrawn EP0016099A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2828960 1978-06-28
DE2828960A DE2828960C2 (de) 1978-06-28 1978-06-28 Verfahren und Anlage zum Herstellen von Mehrlagenrohren

Publications (1)

Publication Number Publication Date
EP0016099A1 true EP0016099A1 (fr) 1980-10-01

Family

ID=6043284

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79900786A Withdrawn EP0016099A1 (fr) 1978-06-28 1980-01-31 Procede et installation de fabrication de tuyaux multicouches

Country Status (6)

Country Link
EP (1) EP0016099A1 (fr)
JP (1) JPS55500689A (fr)
DE (1) DE2828960C2 (fr)
GB (1) GB2039808B (fr)
IT (1) IT1165124B (fr)
WO (1) WO1980000133A1 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3030595A1 (de) * 1980-08-11 1982-03-04 Mannesmann AG, 4000 Düsseldorf Verfahren zur herstellung von innen und aussen mit kunststoff beschichteten korrosionsgeschuetzten mehrlagenrohren
US5145103A (en) * 1990-05-18 1992-09-08 Alfred Teves Gmbh Partial elimination of copper plate from steel strip by mechanical means
US5447179A (en) * 1990-05-18 1995-09-05 Itt Corporation Non-corrosive double-walled steel tube characterized in that the steel has a face-centered cubic grain structure
DE4106178C1 (fr) * 1991-02-27 1992-06-17 Erhard Dipl.-Ing. 5608 Radevormwald De Hentzschel
DE4333036A1 (de) * 1993-09-30 1995-04-06 Froh Roehren Vorrichtung zum Herstellen gelöteter mehrlagiger Metallrohre
JPH08215743A (ja) * 1995-02-15 1996-08-27 Usui Internatl Ind Co Ltd 多重巻金属管およびその製造方法ならびに装置
US5845837A (en) * 1995-12-28 1998-12-08 Itt Automotive, Inc. Polymer-based material for carbon deposition during brazing operations
ES2300670T3 (es) 2000-08-18 2008-06-16 Ti Group Automotive Systems Limited Metodo de metalizado de una tira metalica para su uso en la fabricacion de un tubo de paredes multiples.
CN101983001B (zh) * 2010-09-17 2013-03-27 襄樊世科电气有限公司 不锈钢复合板低温感应加热制造设备
CN103506821A (zh) * 2012-06-28 2014-01-15 浙江兆隆合金股份有限公司 一种低应力铜钢复合焊管的生产方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1431368A (en) * 1921-04-11 1922-10-10 Harry W Bundy Tubing
US2017360A (en) * 1932-10-22 1935-10-15 Nat Tube Co Method of sinking welded tubes
US2084268A (en) * 1934-06-21 1937-06-15 Bundy Tubing Co Tube making and copper coating process
DE751170C (de) * 1935-10-18 1952-11-10 Mecano Spezialartikel Fuer Kra Verfahren zur Herstellung doppelwandiger Rohre aus einem an beiden Kanten zugeschaerften Metallstreifen in einem Walz- und Rollvorgang
DE813839C (de) * 1941-10-31 1951-09-17 Bundy Tubing Co Verfahren zum Verbinden zweier Metallgenstaende
DE878504C (de) * 1944-04-22 1953-06-05 Deutsche Edelstahlwerke Ag Verfahren und Anordnung zur Waermebehandlung von Metallteilen, insbesondere Stahl- und Eisenteilen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8000133A1 *

Also Published As

Publication number Publication date
IT7923924A0 (it) 1979-06-27
DE2828960C2 (de) 1982-09-16
DE2828960A1 (de) 1980-01-03
IT1165124B (it) 1987-04-22
GB2039808A (en) 1980-08-20
GB2039808B (en) 1982-08-18
WO1980000133A1 (fr) 1980-02-07
JPS55500689A (fr) 1980-09-25

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Legal Events

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

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Designated state(s): FR

17P Request for examination filed

Effective date: 19800718

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

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18W Application withdrawn

Withdrawal date: 19820210

RIN1 Information on inventor provided before grant (corrected)

Inventor name: DIETZEL, HANS-ULRICH

Inventor name: MUEFFKE, WALTER