DE4310272A1 - Process for producing multilayered composite tubes with metal inserts - Google Patents

Process for producing multilayered composite tubes with metal inserts

Info

Publication number
DE4310272A1
DE4310272A1 DE19934310272 DE4310272A DE4310272A1 DE 4310272 A1 DE4310272 A1 DE 4310272A1 DE 19934310272 DE19934310272 DE 19934310272 DE 4310272 A DE4310272 A DE 4310272A DE 4310272 A1 DE4310272 A1 DE 4310272A1
Authority
DE
Grant status
Application
Patent type
Prior art keywords
characterized
metal
plastic
tube
welding
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Withdrawn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
DE19934310272
Other languages
German (de)
Inventor
Emil Heinrich Friedrich
Original Assignee
Emil Heinrich Friedrich
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
Family has litigation

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21CMANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06Manufacture 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
    • B21C37/08Making tubes with welded or soldered seams
    • B21C37/09Making tubes with welded or soldered seams of coated strip material ; Making multi-wall tubes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21CMANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06Manufacture 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
    • B21C37/08Making tubes with welded or soldered seams
    • B21C37/0822Guiding or aligning the edges of the bent sheet

Abstract

Published without abstract.

Description

Derartige Verbundrohre sind bekannt und wurden in verschiedenen Verfahrensanmeldungen vorgestellt. Such composite tubes are known and have been presented in various process applications. So sind die Anmeldungen DE 29 23 544 und E 66 408 B zu nennen. Thus, the applications DE 29 23 544 and E 66 408 B are to be mentioned.

Beide Verfahren setzen jedoch voraus, daß der Innendurchmesserr des Metallmantels größer ist als der Außendurchmesser des Kunststoff-Innenrohres. However, both methods require that the Innendurchmesserr of the metal shell is larger than the outer diameter of the inner plastic tube.

Die Durchmesserunterschiede sind zum Teil klar definiert. The diameter differences are clearly defined in part. Auch wird beschrieben, daß der Metallmantel nach dem Schweißen reduziert wird, um eine Verbindung zwischen den beidene Rohrtypen herzustellen. Also that the metal shell is reduced after welding, to connect between the beidene pipe types is described. Nach diesem Reduziervorgang sind erst die Voraussetzungen für eine Klebeverbindung der beiden Rohre gegeneinander geschaffen. After this reduction operation the requirements for an adhesive connection of the two tubes are only against each other together.

Das vorgestellte Verfahren hat den Grundgedanken das Kunststoff- Innenrohr mit einem Metallband kraftschlüssig zu umformen und durch sinnvolles Formen der Bandkanten die Schweißung zu ermöglichen. The presented method has to transform the basic idea of ​​the plastic inner pipe with a metal strip a force fit and to allow by practical shapes of the band edges the weld. Die kraftschlüssige Umformung des Innenrohres bietet die weiteren Vorteile, daß beim Längsnahtschweißen der störende Einfluß von Sauerstoff an der Wurzelseite der Schweißnaht sehr stark eingegrenzt wird, womit Bindefehler vermieden werden. The non-positive deformation of the inner tube has the further advantages that the interfering influence of oxygen to the root side of the weld is very strongly limited in the longitudinal seam welding, and thereby bonding error can be avoided. Lufteinschlüsse zwischen Innenrohr und Metallummantelung sind ausgeschaltet, die Voraussetzungen für den Klebevorgang sind optimiert. Air pockets between the inner tube and the metal shell are off, the conditions for adhesion are optimized.

Reduzier- oder Kalibriereinrichtungen werden überflüssig, eine Verstreckung des Metallmantels auf dem Innenrohr, die bei den Anmeldungen DE 29 23 544 und E 66 408 B unumgänglich sind, findet nicht statt. Reducing or calibration will be superfluous, a stretching of the metal jacket on the inner tube, which are unavoidable in applications DE 29 23 544 and 66 408 E B, does not occur.

Claims (12)

  1. 1. Das vorgestellte Verfahren befaßt sich mit einem rohrförmigen Gebilde mit mindestens 2 Lagen aus unterschiedlichen Werkstoffen bei dem 1 Lage aus PE- oder VPE-Kunststoff und 1 Lage aus Metall besteht. 1. The presented method is concerned with a tubular structure having at least 2 layers of different materials at the 1 sheet of PE or XLPE plastic, and 1 sheet of metal.
    Vorzugsweise werden diese Rohre mit 3 Lagen gefertigt, die in der Reihenfolge von innen nach außen Kunststoff-Metall-Kunststoff aufgebaut sind ( Fig. 1). Preferably, these tubes are manufactured with 3 layers, which are constructed in the order from inside to outside plastic-metal-plastic (Fig. 1).
    Diese Rohrkörper dienen der Förderung von flüssigen oder gasförmigen Medien in erwärmtem oder gekühlten Zustand. These tube bodies serve the conveyance of liquid or gaseous media in a heated or cooled state.
    Die Metalleinlagen sind vorzugsweise dünnwandig und sind dem Rohrdurchmesser sowie dem Verwendungszweck der Rohre angepaßt. The metal inserts are preferably thin-walled and the pipe diameter as well as the intended use of the tubes are adapted.
    Das freie Formen von dünnen Metallbändern zu Rohren sind wegen der beim Formen auftretenden Randspannungen im Band allgemein bekannt. The free forms of thin metal strips into tubes are well known because of occurring in molding edge tensions in the band.
    So ist es außerordentlich schwierig, bei der Endlos-Fertigung der dünnwandigen Rohre die Führung der Bandkanten für den Schweißprozeß in der Form sicherzustellen, daß ein absolut optimales und gleichbleibendes Schweißergebnis sichergestellt werden kann. So it is extremely difficult for the continuous production of thin-walled tubes ensure the leadership of the band edges for the welding process in the form that an absolute optimum and consistent welding results can be ensured.
    Der Anmeldung liegt die Aufgabe zugrunde, ein endlos extrudiertes Kunststoffrohr zu ummanteln, wobei ein Metallband um das Kunststoffrohr in der Längsachse geformt und gasdicht verschweißt wird. The application is based on the object to wrap a continuously extruded plastic tube, a metal strip is formed around the plastic pipe in the longitudinal axis and welded gas-tight.
    Wegen des geringen spezifischen Gewichtes wird in der Hauptsache Aluminium eingesetzt. Because of the low specific gravity is used mainly aluminum.
    Auch bleiben hiermit die mechanischen Eigenschaften, die Flexibilität und die für die Endlos-Fertigung so wichtige Trommelbarkeit der Rohre erhalten. Even with this, the mechanical properties, flexibility and so important for the continuous production winding capability of the tubes remain.
  2. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß beim Formen des Bandes zum Rohr, das Kunststoff-Innenrohr als endlos und synchron mitlaufender Biegedorn genutzt wird. 2. The method of claim 1, characterized in that the plastic inner tube is used as an endlessly and synchronously Revolving bending mandrel in forming the strip to the tube. Dieses Verfahren ermöglicht das problemlose Formen von sehr dünnen Bändern um ein Kunststoff-Innenrohr. This method allows easy forming of very thin bands around a plastic inner tube. Die Rohrform als auch die dabei auftretenden Toleranzmaße werden von dem Innenrohr bestimmt und sind sehr eng toleriert. The tube shape and the dimensions tolerance occurring are determined by the inner tube and are very closely tolerated.
  3. 3. Verfahren nach Anspruch 1 + 2, dadurch gekennzeichnet, daß durch das kraftschlüssige Formen des Metallbandes um das Innenrohr Sauerstoffeinschlüsse vermieden werden, die beim anschließenden Längsnahtschweißen störend wirken und auch die Klebeverbindung zwischen Innenrohr und Metallummantelung negativ beeinflussen. 3. The method of claim 1 + 2, characterized in that is avoided by the frictional forms of the metal strip around the inner pipe oxygen inclusions which interfere in the subsequent longitudinal seam welding, and also adversely affect the adhesive bond between the inner tube and the metal shell.
  4. 4. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die in Längsachse laufenden Bandkanten in einem Profilierwerkzeug auf eine Höhe, entsprechend der Bandstärke angebogen werden ( Fig. 2 + 4), wobei die Knaten an ihrem dem Rohr abgekehrten Enden zur Bildung einer homogenen, geschlossenen, gasdichten Hülle metallisch, vorzugsweise durch Schweißen miteinander verbunden werden ( Fig. 3). 4. The method according to claim 1, characterized in that the running in the longitudinal axis of the strip edges, in a profiling tool to a height, be curved corresponding to the band thickness (Fig. 2 + 4), wherein the Knaten a homogeneous at its side remote from the pipe ends to form closed, gas-tight envelope metallic, preferably joined together by welding (Fig. 3).
  5. 5. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß der Rohrformmaschine eine Bandbesäumstation vorgeschaltet ist, die neben der immer gleichen Bandbreite auch oxydfreie Schnittkanten sicherstellt, die für den Schutzgasschweißvorgang von Bedeutung sind. 5. The method according to claim 1, characterized in that the tube forming machine a Bandbesäumstation is connected upstream of that ensures always next to the same bandwidth also oxide-free cutting edges, which are for the shielding gas welding process is important.
  6. 6. Verfahren nach Anspruch 4, dadurch gekennzeichent, daß die beiden nach außen hochgestellten Bandkanten das Band stabilisieren und somit bessere Führungsmöglichkeiten im kontinuierlichen Prozeßablauf sicherstellen. 6. A method according to claim 4, characterized gekennzeichent that the two outwardly raised band edges stabilize the tape, thus ensuring better guidance possibilities in the continuous process flow.
  7. 7. Verfahren nach Anspruch 4, dadurch gekennzeichnet, daß durch diese Art der Bandkantenvorbereitung das Längsnahtschweißen des Metallmantels auf dem Kunststoff-Innenrohr, ohne Luftspalt ermöglicht wird ( Fig. 2, Pos. 1 + 2 ). 7. The method according to claim 4, characterized in that by this type of strip edge preparation, the longitudinal welding of the metal jacket is made possible on the plastic inner tube, without an air gap (Fig. 2, Pos. 1 + 2).
  8. 8. Verfahren nach Anspruch 4, dadurch gekennzeichnet, daß bessere Vorbedingungen für den folgenden Schweißprozeß geschaffen sind, da durch die Höhe der beiden Bandkanten ( Fig. 2, Pos. 3 ) das Volumen der Schweißschmelze bestimmt wird, womit die Überhöhung der Schweißnaht ( Fig. 2, Pos. h) im Nahtbereich festgelegt und optimiert wird. 8. The method according to claim 4, characterized in that better conditions for the subsequent welding process are created, as by the height of the two strip edges (Fig. 2, Pos. 3) the volume of the weld puddle is determined, with which the reinforcement of the weld (FIG ) is set in the seam area and optimized. 2, Pos. h.
    Durch die erhöhte Schweißschmelze wird die Schweißnaht homogen, gasdicht und mechanisch höher belastbar. Due to the increased melt welding the weld is homogeneous, gastight and higher mechanical loads.
  9. 9. Verfahren nach Anspruch 1-6, dadurch gekennzeichnet, daß nach dem Längsnaht-Schweißen des Rohrstoßes das Rohr, besonders im Bereich der Schweißnaht warm ist. 9. The method of claim 1-6, characterized in that the tube still is warm after the longitudinal seam welding of the pipe joint especially in the area of ​​the weld. Mit dem Abkühlen der Schweißnaht findet ein Schrumpfvorgang statt ( Fig. 3). With cooling, the weld is a shrinking process instead (Fig. 3).
    Der Metallmantel wird dabei kraftschlüssig auf das Innenrohr gezogen. The metal shell is thereby positively drawn onto the inner tube.
  10. 10. Verfahren nach Anspruch 5, dadurch gekennzeichnet, daß die Rohrkombination Kunststoff-Metall rundum erwärmt wird. 10. The method according to claim 5, characterized in that the pipe combination plastic and metal is completely heated. Der Haftvermittler wird aktiviert, und die Verklebung zwischen den beiden eng aufeinanderliegenden Rohren, aus unterschiedlichen Werkstoffen findet statt und wird nochmals durch den zentrisch einsetzenden Schrumpfvorgang des Metallmantels begünstigt. The adhesion promoter is activated and the bonding between the two closely superposed tubes, made of different materials occurs and is again favored by the centrally onset shrinking process of the metal shell.
  11. 11. Verfahren nach den vorstehenden Ansprüchen, dadurch gekennzeichnet, daß die in Längsachse laufenden, hochgestellten Bandkanten beim Schweißen fest zusammengepreßt sind und als Führung dienen für den mittig über dem Bandkantenstoß angeordneten Schutzgasschweißbrenner. 11. The method according to the preceding claims, characterized in that the running in the longitudinal axis, raised strip edges are pressed firmly together during welding and serve as a guide for the disposed centrally above the band edge joint shielding gas welding torch.
  12. 12. Verfahren nach den vorstehenden Ansprüchen bietet den Vorteil, daß auf Rohr-Kalibrier- oder Reduziereinrichtungen verzichtet werden kann, da der Verbund Kunststoff-Innenrohr mit dem Metallmantel maß- und paßgenau geschweißt wird ( Fig. 3). 12. The method according to the preceding claims offers the advantage that can be dispensed tube calibration or reduction means, since the composite plastic inner tube customized to the metallic shell and is welded in register (FIG. 3).
DE19934310272 1993-03-30 1993-03-30 Process for producing multilayered composite tubes with metal inserts Withdrawn DE4310272A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19934310272 DE4310272A1 (en) 1993-03-30 1993-03-30 Process for producing multilayered composite tubes with metal inserts

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19934310272 DE4310272A1 (en) 1993-03-30 1993-03-30 Process for producing multilayered composite tubes with metal inserts
AT94104590T AT166806T (en) 1993-03-30 1994-03-22 A method for producing multilayer composite pipes with metal inserts
EP19940104590 EP0639411B2 (en) 1993-03-30 1994-03-22 Process for the manufacturing of multi layer composite tubes with ferrous and non ferrous metal inlets
DE1994506114 DE59406114D1 (en) 1993-03-30 1994-03-22 A method for producing multilayer composite pipes with metal inserts

Publications (1)

Publication Number Publication Date
DE4310272A1 true true DE4310272A1 (en) 1994-10-06

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Family Applications (1)

Application Number Title Priority Date Filing Date
DE19934310272 Withdrawn DE4310272A1 (en) 1993-03-30 1993-03-30 Process for producing multilayered composite tubes with metal inserts

Country Status (2)

Country Link
EP (1) EP0639411B2 (en)
DE (1) DE4310272A1 (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29511606U1 (en) * 1995-07-18 1995-11-02 Inventa Ag Coolant line
DE19515853C1 (en) * 1995-04-29 1996-08-22 Hewing Gmbh Metal jacket application method for plastics pipes
DE29713049U1 (en) * 1997-07-23 1997-10-30 Unicor Rohrsysteme Gmbh composite pipe
DE19646859C1 (en) * 1996-11-13 1998-04-23 Hewing Gmbh A method for sheathing a plastic pipe with a metal band
US5850855A (en) * 1990-01-09 1998-12-22 Ems-Inventa Ag Flexible coolant conduit and method of making same
US6293311B1 (en) 1998-05-22 2001-09-25 Pmd Holdings Corp. Multilayer composite pipe fluid conduit system using multilayer composite pipe and method of making the composite
DE10022823A1 (en) * 2000-05-10 2001-11-22 Unicor Extrusionstechnik Gmbh Multi-layer metal composite tube manufacture, involving lining formed metal tube with plastic and extruding plastic cover onto the tube exterior
WO2004049533A1 (en) * 2002-11-28 2004-06-10 Ccs Technology, Inc. Installation element for a telecommunication element, method for the production of such an installation element, and method for installing a telecommunication element
DE102006057199A1 (en) * 2006-12-05 2008-06-12 Henco Industries Nv Composite tube, e.g. for connecting components in refrigerating/solar-power plants, has two plastic layers forming inner and outer layers each including a metal layer with an intermediate joint formed by a layer of bonding agent
DE102009013251A1 (en) * 2009-03-14 2010-09-16 Becker Plastics Gmbh Plastic-metal-composite pipe for domestic installation, comprises a first plastic layer, which is arranged on the interior side of the pipe and is surrounded by a metal foil, which has a perforation from flat distributed holes
US8491744B2 (en) 2006-09-02 2013-07-23 Uponor Innovation Ab Method for the production of a cylindrical, strand-shaped part

Families Citing this family (6)

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DE19632021C1 (en) * 1996-08-08 1998-01-02 Hewing Gmbh A method for sheathing a plastic pipe with a metal strip and welding station for welding the overlapping longitudinal edges of the metal strip
WO2004067269A3 (en) * 2003-01-31 2004-11-04 Horst Bonn Plastic-metal composite pipe comprising a metallic double envelope and method and device for producing the same
DE10318328B3 (en) * 2003-04-19 2004-07-15 Uponor Innovation Ab Bonded plastic-metal tube for heating installation has plastic base tube with oxygen diffusion blocking layer on it and layer of bonding material on that, with metal band on it
CN100415436C (en) 2004-09-16 2008-09-03 吉欣(英德)热轧不锈复合钢有限公司;严孟杰 Method for producing cold rolling continuous welding metal inner composite pipe
DE102007006699A1 (en) * 2007-02-10 2008-08-14 Bayerische Motoren Werke Aktiengesellschaft Exhaust system for an internal combustion engine
JP5871417B1 (en) * 2015-12-04 2016-03-01 中川産業株式会社 Method of manufacturing a double-pipe

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Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5850855A (en) * 1990-01-09 1998-12-22 Ems-Inventa Ag Flexible coolant conduit and method of making same
DE19515853C2 (en) * 1995-04-29 2001-01-18 Hewing Gmbh A method for sheathing a plastic pipe with a metal jacket
DE19515853C1 (en) * 1995-04-29 1996-08-22 Hewing Gmbh Metal jacket application method for plastics pipes
DE29511606U1 (en) * 1995-07-18 1995-11-02 Inventa Ag Coolant line
DE19646859C1 (en) * 1996-11-13 1998-04-23 Hewing Gmbh A method for sheathing a plastic pipe with a metal band
WO1998020989A1 (en) * 1996-11-13 1998-05-22 Hewing Gmbh Method for wrapping a metal strip around a plastic tube
DE29713049U1 (en) * 1997-07-23 1997-10-30 Unicor Rohrsysteme Gmbh composite pipe
US6293311B1 (en) 1998-05-22 2001-09-25 Pmd Holdings Corp. Multilayer composite pipe fluid conduit system using multilayer composite pipe and method of making the composite
DE10022823A1 (en) * 2000-05-10 2001-11-22 Unicor Extrusionstechnik Gmbh Multi-layer metal composite tube manufacture, involving lining formed metal tube with plastic and extruding plastic cover onto the tube exterior
WO2004049533A1 (en) * 2002-11-28 2004-06-10 Ccs Technology, Inc. Installation element for a telecommunication element, method for the production of such an installation element, and method for installing a telecommunication element
US8491744B2 (en) 2006-09-02 2013-07-23 Uponor Innovation Ab Method for the production of a cylindrical, strand-shaped part
DE102006057199A1 (en) * 2006-12-05 2008-06-12 Henco Industries Nv Composite tube, e.g. for connecting components in refrigerating/solar-power plants, has two plastic layers forming inner and outer layers each including a metal layer with an intermediate joint formed by a layer of bonding agent
DE102009013251A1 (en) * 2009-03-14 2010-09-16 Becker Plastics Gmbh Plastic-metal-composite pipe for domestic installation, comprises a first plastic layer, which is arranged on the interior side of the pipe and is surrounded by a metal foil, which has a perforation from flat distributed holes
DE102009013251B4 (en) * 2009-03-14 2018-06-21 Becker Plastics Gmbh Plastic-metal composite tube

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EP0639411B2 (en) 2002-11-06 grant
EP0639411A1 (en) 1995-02-22 application
EP0639411B1 (en) 1998-06-03 grant

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