DE3808728A1 - Method for the production of a tube with a longitudinal seam - Google Patents

Method for the production of a tube with a longitudinal seam

Info

Publication number
DE3808728A1
DE3808728A1 DE3808728A DE3808728A DE3808728A1 DE 3808728 A1 DE3808728 A1 DE 3808728A1 DE 3808728 A DE3808728 A DE 3808728A DE 3808728 A DE3808728 A DE 3808728A DE 3808728 A1 DE3808728 A1 DE 3808728A1
Authority
DE
Germany
Prior art keywords
longitudinal seam
tube
coating
seam tube
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.)
Ceased
Application number
DE3808728A
Other languages
German (de)
Inventor
Franz Anton Schroeder
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.)
Individual
Original Assignee
Individual
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 claimed from DE8716932U external-priority patent/DE8716932U1/en
Application filed by Individual filed Critical Individual
Priority to DE3808728A priority Critical patent/DE3808728A1/en
Publication of DE3808728A1 publication Critical patent/DE3808728A1/en
Ceased 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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/15—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor incorporating preformed parts or layers, e.g. extrusion moulding around inserts
    • B29C48/151—Coating hollow articles
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47H—FURNISHINGS FOR WINDOWS OR DOORS
    • A47H1/00—Curtain suspension devices
    • A47H1/02—Curtain rods
    • A47H2001/0215—Curtain rods being tubular
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Abstract

A method for the production of a tube with a longitudinal seam for articles used in interior decoration, according to which a thin metal strip with a thickness of 0.1 to 1.5 mm is profiled to give a tube with a longitudinal seam and then coated with a plastic jacket. The technical problem is the production of a tube with a longitudinal seam in which the longitudinal seam has a firm join, can be produced economically and is protected by a coating. The tube is laser-welded while the longitudinal seam is compressed. The tube with the longitudinal seam is then cooled in a cooling section. The tube with the longitudinal seam is taken from the cooling section and introduced directly into an extruder for coating. <IMAGE>

Description

Die Erfindung betrifft ein Verfahren zur Herstellung eines Längs­ nahtrohres für Innendekorationsartikel, wonach ein dünnes Metallband von 0,1 bis 1,5 mm Dicke zu einem Längsnahtrohr profiliert und an­ schließend mit einem Kunststoffmantel beschichtet wird.The invention relates to a method for producing a longitudinal seam tube for interior decoration items, after which a thin metal band from 0.1 to 1.5 mm thick to a longitudinal seam tube and attached is finally coated with a plastic jacket.

Derartige Innendekorationsartikel sind insbesondere Gardinenstan­ gen aus Stahlband, Aluminiumband oder Messingband. Das Längsnahtrohr kann einen runden, einen ovalen oder einen anders profilierten Quer­ schnitt haben. Unter Rohr wird in diesem Fall auch ein profiliertes Material verstanden. Die Naht eines solchen Längsnahtrohres ist außer­ ordentlich schwierig zu stabilisieren, da das Metallband dünn und nachgiebig ist. Eine herkömmliche Schweißung ist in der Praxis zu auf­ wendig, insbesondere weil die Schweißung zu viel Zeit erfordert und in­ folge der starken Erwärmung eine langdauernde Abkühlung erforderlich macht. Wenn man das Längsnahtrohr zwischen Profilierwalzen formt, so kann der Spalt der Längsnaht nie ganz verschwinden, weil das Band zurückfedert, so daß immer ein schmaler Spalt offen bleibt. Dieses ist insbesondere bei lackierten Rohren sehr nachteilig.Such interior decoration items are especially curtains steel, aluminum or brass tape. The longitudinal seam tube can be a round, an oval or another profiled cross have cut. In this case, a profiled tube is also used Understood material. The seam of such a longitudinal seam tube is excluded neatly difficult to stabilize because the metal band is thin and is compliant. A conventional weld is too open in practice agile, especially because the welding takes too much time and in as a result of the intense warming, a long cooling period is required makes. If you shape the longitudinal seam tube between profiling rollers, so the gap in the longitudinal seam can never completely disappear because of the tape springs back so that a narrow gap always remains open. This is particularly disadvantageous for painted tubes.

Außerdem klafft die unverschlossene Längsnaht unter Belastungen, insbesondere Verkantungen leicht auf, so daß eine teleskopartige Gar­ dinenstange durchhängt oder in anderer Weise im Gebrauch leidet. Eine Kunststoffbeschichtung ist zwar grundsätzlich möglich, doch ergeben sich auch da Schwierigkeiten, weil der Kunststoff möglicherweise durch die offenstehende Längsnaht in das Innere des Rohres eindringen kann. Das Problem der mangenden Stabilität läßt sich ebenfalls nicht beheben.In addition, the unlocked longitudinal seam gapes under loads, especially tilting slightly, so that a telescopic gar sine bar sags or otherwise suffers in use. A Plastic coating is possible in principle, but results difficulties because of the plastic penetrate into the interior of the pipe through the open longitudinal seam can. The problem of lack of stability cannot be solved either remedy.

Aufgabe der Erfindung ist die Herstellung eines Längsnahtrohres, bei dem die Längsnaht einen festen Zusammenhalt hat, wirtschaftlich herstellbar ist und durch eine Beschichtung geschützt ist.The object of the invention is the production of a longitudinal seam tube, where the longitudinal seam has a solid cohesion, economically  can be produced and is protected by a coating.

Diese Aufgabe wird nach der Erfindung dadurch gelöst, daß unter Zusammendrücken der Längsnaht eine Laserschweißung erfolgt, daß an­ schließend das Längsnahtrohr in einer Abkühlstrecke abgekühlt wird und daß das Längsnahtrohr aus der Abkühlstrecke unmittelbar in einen Extruder zur Beschichtung eingeführt wird.This object is achieved according to the invention in that under Squeezing the longitudinal seam is done by laser welding finally the longitudinal seam tube is cooled in a cooling section and that the longitudinal seam tube from the cooling section directly into one Extruder is introduced for coating.

Die Erfindung unterscheidet sich insofern vom Stand der Technik, als die Laserschweißnaht eine große Festigkeit aufweist. Sie ist mit üblichen Arbeitsgeschwindigkeiten von 10 bis 50 m/min einer Profilier­ maschine herstellbar. Die Laserschweißvorrichtung läßt sich an eine Rohrprofiliermaschine ohne weiteres anbauen. Das Material wird je­ weils nur in dem lokalen Bereich des Laserbrennpunktes auf Schmelz­ temperatur erwärmt. Die Erwärmung des gesamten Rohres ist infolgedes­ sen so gering, daß auf einer Arbeitsstrecke von 1 bis 2 m eine ausrei­ chende Abkühlung erfolgt, so daß das Längsnahtrohr unmittelbar aus der Abkühlstrecke in einen Extruder zur Beschichtung eingeführt wer­ den kann. Infolgedessen läßt sich das Verfahren online durchführen. Man erhält eine Kunststoffbeschichtung, die für das Längsnahtrohr einen optimalen Schutz bietet.The invention differs from the prior art in that than the laser weld seam has great strength. She is with usual working speeds of 10 to 50 m / min a profiling machine producible. The laser welding device can be connected to a Mount the pipe profiling machine without further ado. The material is ever because only in the local area of the laser focus on enamel temperature warmed. As a result, the entire pipe is heated sen so low that one is sufficient over a working distance of 1 to 2 m Cooling takes place, so that the longitudinal seam tube immediately of the cooling section into an extruder for coating that can. As a result, the procedure can be performed online. A plastic coating is obtained, which is used for the longitudinal seam tube offers optimal protection.

Außerdem betrifft die Erfindung ein Längsnahtrohr für Innendeko­ rationsartikel aus einem dünnen Metallband von 0,1 bis 1,5 mm Dicke, das dadurch gekennzeichnet ist, daß die Längsnaht als Laserschweiß­ naht ausgebildet ist und daß eine Kunststoffbeschichtung das Längs­ nahtrohr umgibt.The invention also relates to a longitudinal seam tube for interior decoration rationsartikel from a thin metal band from 0.1 to 1.5 mm thickness, which is characterized in that the longitudinal seam as laser welding is formed and that a plastic coating the longitudinal surrounds the seam tube.

Eine Ausführungsform der Erfindung wird im Folgenden unter Bezug­ nahme auf die anliegende Zeichnung erläutert, in der darstellenAn embodiment of the invention is described below with reference took explained on the attached drawing, in the represent

Fig. 1 die Herstellung eines Längsnahtrohres nach der Erfindung in einer Ansicht der Herstellungsmaschine, Fig. 1 shows the production of a longitudinal seam pipe according to the invention in a view of the manufacturing machine,

Fig. 2 eine Draufsicht zu Fig. 1, Fig. 2 is a plan view of FIG. 1,

Fig. 3 einen Querschnitt durch ein Längsnahtrohr nach dem Schweißen und vor dem Beschichten und Fig. 3 shows a cross section through a longitudinal seam tube after welding and before coating and

Fig. 4 einen Querschnitt durch das fertige Längsnahtrohr. Fig. 4 shows a cross section through the finished longitudinal seam tube.

Eine Profiliermaschine 1 für ein Längsnahtrohr umfaßt eine Reihe von Paaren von Profilierwalzen 2, die das ebene Band fortgesetzt um­ formen und beim Vorschub runden, so daß das Band beim Austritt aus dem letzten Profilierwalzenpaar 3 im wesentlichen vollständig unter Bildung einer Längsnaht gerundet ist. Die Arbeitsgeschwindigkeit einer solchen Profiliermaschine liegt üblicherweise zwischen 10 und 50 m/min. A profiling machine 1 for a longitudinal seam tube comprises a series of pairs of profiling rollers 2 , which continue to form the flat band and round when fed, so that the band is essentially completely rounded as it emerges from the last pair of profiling rollers 3 to form a longitudinal seam. The working speed of such a profiling machine is usually between 10 and 50 m / min.

Im Anschluß an das Profilierwalzenpaar 3 sind zwei Druckrollen 4 vorgesehen, deren Achsen senkrecht zu der Achse der Profilierwalzen ausgerichtet sind. Diese Druckrollen 4 drücken die Längsnaht zusam­ men. Anschließend an die Druckrollen 4 läuft das Längsnahtrohr durch eine Führung 5 einer Laserschweißvorrichtung 6. Der Laserstrahl der Laserschweißvorrichtung 6 schweißt die Längsnaht unter Bildung einer Laserschweißnaht 9 kontinuierlich zusammen. Nur im Laserstrahlbrenn­ punkt erfolgt eine Erwärmung auf die Schmelztemperatur des Metalls. Infolgedessen wird das gesamte Rohr nur wenig erwärmt. Weitere Profi­ lierwalzen 7 halten die Laserschweißnaht bis zur ausreichenden Verfe­ stigung zusammen und verhindern so ein Aufspringen der Laserschweiß­ naht 9.Following the pair of profiling rollers 3 , two pressure rollers 4 are provided, the axes of which are aligned perpendicular to the axis of the profiling rollers. These pressure rollers 4 press the longitudinal seam together. Following the pressure rollers 4 , the longitudinal seam tube runs through a guide 5 of a laser welding device 6 . The laser beam of the laser welding device 6 continuously welds the longitudinal seam to form a laser welding seam 9 . A heating to the melting temperature of the metal occurs only in the laser beam focal point. As a result, the entire tube is only slightly heated. Other professional rollers 7 hold the laser weld seam together until sufficient reinforcement and thus prevent the laser welding seam from popping open. 9

Ein längsgeschweißtes Längsnahtrohr 8 verläßt die Profilierma­ schine und wird in einer Kühlstrecke online abgekühlt. Bei üblichen Arbeitsgeschwindigkeiten einer Profiliermaschine reicht eine Kühl­ strecke von 1 bis 2 m Länge aus. Das Rohr kann dann ohne weiteres beschichtet werden.A longitudinally welded longitudinal seam tube 8 leaves the profiling machine and is cooled online in a cooling section. At normal working speeds of a profiling machine, a cooling section of 1 to 2 m length is sufficient. The tube can then be easily coated.

Das Längsnahtrohr 8 wird in einen Extruder 10 eingeführt und im Durchlauf mit einer Kunststoffbeschichtung 11 ummantelt. Man erhält so ein beschichtetes Längsnahtrohr gemäß Fig. 4. Infolge der Laser­ schweißnaht 9 hat dieses Längsnahtrohr einen festen mechanischen Zu­ sammenhalt. Die Beschichtung 11 verbessert diesen mechanischen Zusam­ menhalt und gibt einen ausgezeichneten Korrosionsschutz. Eine weitere Schutzbehandlung ist nicht erforderlich.The longitudinal seam tube 8 is introduced into an extruder 10 and coated with a plastic coating 11 in a continuous process. A coated longitudinal seam tube according to FIG. 4 is obtained in this way . As a result of the laser weld 9 , this longitudinal seam tube has a solid mechanical joint. The coating 11 improves this mechanical cohesion and gives excellent corrosion protection. No further protective treatment is required.

Das Band kann von der Rolle, also endlos in die Maschine einge­ führt werden. Andererseits ist es auch möglich, das Band in Fixlängen in die Maschine einzuführen.The belt can be taken from the roll, i.e. endlessly into the machine leads. On the other hand, it is also possible to have the tape in fixed lengths insert into the machine.

Claims (2)

1. Verfahren zur Herstellung eines Längsnahtrohres für Innendeko­ rationsartikel, wonach ein dünnes Metallband von 0,1 bis 1,5 mm Dicke zu einem Längsnahtrohr profiliert und anschließend mit einem Kunst­ stoffmantel beschichtet wird, dadurch gekennzeichnet, daß unter Zusam­ mendrücken der Längsnaht eine Laserschweißung erfolgt, daß anschlie­ ßend das Längsnahtrohr in einer Abkühlstrecke abgekühlt wird und daß das Längsnahtrohr aus der Abkühlstrecke unmittelbar in einen Extruder zur Beschichtung eingeführt wird.1. A process for producing a longitudinal seam tube for interior decoration articles, according to which a thin metal strip of 0.1 to 1.5 mm thickness is profiled to form a longitudinal seam tube and then coated with a plastic sheath, characterized in that a laser welding is carried out while compressing the longitudinal seam that the longitudinal seam tube is then cooled in a cooling section and that the longitudinal seam tube is introduced directly from the cooling section into an extruder for coating. 2. Längsnahtrohr für Innendekorationsartikel aus einem dünnen Metallband von 0,1 bis 1,5 mm Dicke, dadurch gekennzeichnet, daß die Längsnaht als Laserschweißnaht (9) ausgebildet ist und daß eine Kunst­ stoffbeschichtung (11) das Längsnahtrohr (8) umgibt.2. longitudinal seam tube for interior decoration items made of a thin metal strip of 0.1 to 1.5 mm thick, characterized in that the longitudinal seam is designed as a laser weld seam ( 9 ) and that a plastic coating ( 11 ) surrounds the longitudinal seam tube ( 8 ).
DE3808728A 1987-12-24 1988-03-16 Method for the production of a tube with a longitudinal seam Ceased DE3808728A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE3808728A DE3808728A1 (en) 1987-12-24 1988-03-16 Method for the production of a tube with a longitudinal seam

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8716932U DE8716932U1 (en) 1987-12-24 1987-12-24 Longitudinal seam tube for interior decoration items
DE3808728A DE3808728A1 (en) 1987-12-24 1988-03-16 Method for the production of a tube with a longitudinal seam

Publications (1)

Publication Number Publication Date
DE3808728A1 true DE3808728A1 (en) 1989-07-06

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Family Applications (1)

Application Number Title Priority Date Filing Date
DE3808728A Ceased DE3808728A1 (en) 1987-12-24 1988-03-16 Method for the production of a tube with a longitudinal seam

Country Status (1)

Country Link
DE (1) DE3808728A1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5314108A (en) * 1991-12-02 1994-05-24 Usui Kokusai Sangyo Kaisha Limited Method of producing welded tube with excellent corrosion-resistant inner surface
EP0639411A1 (en) * 1993-03-30 1995-02-22 Hewing GmbH Process for the manufacturing of multi layer composite tubes with ferrous and non ferrous metal inlets
DE4434134A1 (en) * 1994-09-24 1996-03-28 Kabelmetal Electro Gmbh Process for producing a longitudinally welded metal tube
WO1998025727A1 (en) * 1996-12-10 1998-06-18 Obschestvo S Ogranichennoi Otvetstvennostju 'lastr' Method for manufacturing longitudinally welded pipes by laser welding and structure for implementation of the method
WO2014082735A1 (en) * 2012-11-29 2014-06-05 Rehau Ag + Co Method for producing a multi-layer pipe line, pipe line, and air-conditioning system having such a pipe line

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3559280A (en) * 1968-03-13 1971-02-02 Allied Tube & Conduit Corp Method and apparatus for the continuous forming, galvanizing and coloring of tubing
DE2045973A1 (en) * 1969-10-09 1971-05-13 Kabel Metallwerke Ghh Tubular structure

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3559280A (en) * 1968-03-13 1971-02-02 Allied Tube & Conduit Corp Method and apparatus for the continuous forming, galvanizing and coloring of tubing
DE2045973A1 (en) * 1969-10-09 1971-05-13 Kabel Metallwerke Ghh Tubular structure

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DD-Zeitschrift "Neue Hütte", 1977, Heft 4, S. 204-208 *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5314108A (en) * 1991-12-02 1994-05-24 Usui Kokusai Sangyo Kaisha Limited Method of producing welded tube with excellent corrosion-resistant inner surface
EP0639411A1 (en) * 1993-03-30 1995-02-22 Hewing GmbH Process for the manufacturing of multi layer composite tubes with ferrous and non ferrous metal inlets
DE4434134A1 (en) * 1994-09-24 1996-03-28 Kabelmetal Electro Gmbh Process for producing a longitudinally welded metal tube
US5613631A (en) * 1994-09-24 1997-03-25 Alcatel Kabel Ag & Co Method for producing a lengthwise welded metal tube
WO1998025727A1 (en) * 1996-12-10 1998-06-18 Obschestvo S Ogranichennoi Otvetstvennostju 'lastr' Method for manufacturing longitudinally welded pipes by laser welding and structure for implementation of the method
WO2014082735A1 (en) * 2012-11-29 2014-06-05 Rehau Ag + Co Method for producing a multi-layer pipe line, pipe line, and air-conditioning system having such a pipe line
EP2925463B1 (en) 2012-11-29 2018-12-26 REHAU AG + Co Method for producing a multi-layer pipe line, pipe line, and air-conditioning system having such a pipe line

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