EP1625898B1 - Device for the manufacture of tubes - Google Patents

Device for the manufacture of tubes Download PDF

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Publication number
EP1625898B1
EP1625898B1 EP05015706A EP05015706A EP1625898B1 EP 1625898 B1 EP1625898 B1 EP 1625898B1 EP 05015706 A EP05015706 A EP 05015706A EP 05015706 A EP05015706 A EP 05015706A EP 1625898 B1 EP1625898 B1 EP 1625898B1
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EP
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Prior art keywords
clamping
pressing
tube blank
clamping jaws
blank
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EP05015706A
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German (de)
French (fr)
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EP1625898A1 (en
Inventor
Wolfgang Weil
Walther Lacher
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Weil Engineering GmbH
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Weil Engineering GmbH
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    • 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
    • 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
    • B21C37/0818—Manufacture of tubes by drawing of strip material through dies

Definitions

  • the invention relates to a device for producing tubes made of thin-walled material, in particular of sheet metal, with a clamping device which has clamping jaws arranged on opposite sides of the tube blank and pressable against the tube blank for holding a tube-shaped preformed tube blank in the welding position.
  • Package flat side adjoining pressure plates have, which rest in a landing area narrow side of the pipe blank and are pressed against the pipe blank, the plate packages are adapted to the outer contour of the pipe blank in the landing area, according to the preamble of claim 1.
  • Such a device is from the DE-C-593 622 known.
  • clamping jaws each consisting of a number of spaced-apart clamping elements, which are pressed to hold a tubular preformed blank in welding position against the pipe blank. Since the distance of the sides of the tube blank to be welded together varies slightly in the region of each clamping element, the weld can in particular over the entire longitudinal extent can hardly be produced with the desired accuracy and quality in contoured tubes.
  • the known device comprises a tensioning device which has clamping jaws which can be pressed on opposite sides of the pipe blank for holding a tubular preformed pipe blank in the welding position. These jaws carry steel forming discs which have decreasing recesses corresponding to the conical tube.
  • a device for the production of longitudinally welded pipes from sheet metal blanks with parallel longitudinal edges is known.
  • the previously known device has a clamping device with two mutually associated mold halves, between which the tube to be processed sheet metal blank can be inserted so that the emerging at the apex of the molds from the mold gaps longitudinal edges can be kept in the welding position to form a butt joint until a via The welding gap movable welding device these longitudinal edges welded together.
  • the clamping device comprising the mold halves is fixed to a specific pipe diameter.
  • the known device For forming the metal strip, the known device has a die with an inner channel, in which the strip is bent in the transverse direction during its movement in the longitudinal direction.
  • the die In order to be able to form a larger range of diameters with only one die, the die consists of the US-A-3,433,043 previously known device of a number of adjoining slats, which are arranged to adjust the shape of the inner channel on the diameter of the tubular element adjustable and with the aid of flat bars, which act on the outboard slats, can be fixed.
  • a die intended for forming a metal strip is described above. With the help of the prior art forming die only tubes with a constant cross section in a continuous Process be prepared.
  • the inventive solution to this problem is in the device of the type mentioned in particular that the device has a welding machine for longitudinal seam welding and that the clamping jaws are pressed by at least one pressure roller against the pipe blank, which pressure rollers pressurize the pressure plates on their side facing away from the landing side narrow side ,
  • the device according to the invention has a tensioning device, the clamping jaws of which are arranged on opposite sides of the tube blank in each case have a plate packet on the flat side of abutting pressure plates. These plate packages are adapted to the outer contour of the pipe blank in a landing area such that the pressure plates lie there on the narrow side of the pipe blank.
  • the tensioning device of the device according to the invention with its plate packages formed from a plurality of pressure plates, ensures that the sides to be welded together, even of a contoured tube blank, rest uniformly against one another over the entire longitudinal extent.
  • the clamping jaws are pressed by means of at least one pressure roller against the pipe blank, wherein the pressure rollers act on the pressure plates on their side facing away from the landing narrow side.
  • the pressure plates each have a plate thickness which approximately corresponds to the width of the pipe material softened by the welding point of the welding machine.
  • the pressure plates are each formed from a sheet metal blank.
  • the plate packages formed from a plurality of Andschreibplatten can be easily and quickly move relative to the pipe blank when the jaws each have a clamping bar on which the clamping jaw associated plate package is held.
  • a preferred embodiment according to the invention provides that the clamping strips of the opposing clamping jaws define the weld therebetween.
  • the pressure rollers are pressed respectively by means of a two-armed toggle lever against the clamping jaws, facing away from the pressure roller arm end of a pressure cylinder or the like pressure transducer.
  • FIGS. 1 to 3 is a device 1 for producing pipes made of thin-walled material, in particular of sheets, shown in different views.
  • the device 1 has a butt seam welding machine, not shown here, for longitudinal seam welding and a clamping device 2, which is intended to hold a tubular preformed material blank 3 in the welding position.
  • the clamping device 2 has arranged on opposite sides of the pipe blank 3 clamping jaws 4, which are pressed against the pipe blank 3.
  • the clamping jaws 4 each have a plate package on flat side abutting pressure plates 5, which rest in a landing area 6 narrow side of the pipe blank 3.
  • the plate packages are adapted in this application area 6 to the contoured outer contour of the outer blank over its longitudinal extent different diameter tube blank 3.
  • the clamping jaws 4 can each be pressed against the tube blank 3 by means of a pressure roller 9.
  • the axes 10 of the opposing sides of the pipe blank 3 in pairs mutually associated pressure rollers 9 are arranged in a transverse to the longitudinal extent of the pipe blank 3 and extending through the welding point of the welding machine level, in FIGS. 2 and 3 is indicated by the line L.
  • the pressure plates 5 are pressurized on their side facing away from the landing area 6 narrow side of the pressure rollers 9. The pressure rollers 9 thus transfer their radially acting pressure force in each case to those pressure plates 5, which lie in the plane L of the welding point of the welding machine.
  • the plate packages are not shown here Way each held on mutually associated massive clamping strips 11.
  • the on opposite sides of the Rohrzutechnisches 3 pairs associated clamping bars 11 define between them the longitudinal weld 12th
  • the pressure plates 5 have a joint-shaped formation 13, with which the pressure plates 5 are threaded in a complementary shaped joint pan-shaped recess in the associated tensioning strip 11.
  • This connection between the plate-forming a pressure plate 5 on the one hand and the associated clamping bar 11 on the other hand forms an axisless hinge fourteenth

Abstract

Machine for producing pipes from sheet metal has a longitudinal welder and a clamp (2) with jaws (4) which hold the pipe (3) in position for welding. The jaws are fitted with packets of plates (5) with a narrow upper section (6) which fits against the pipe wall.

Description

Die Erfindung betrifft eine Vorrichtung zum Herstellen von Rohren aus dünnwandigem Material, insbesondere aus Blechen, mit einer Spannvorrichtung, die auf gegenüberliegenden Seiten des Rohrzuschnittes angeordnete und gegen den Rohrzuschnitt andrückbare Spannbacken zum Halten eines rohrförmig vorgeformten Rohrzuschnittes in Schweißstellung hat, welche Spannbacken jeweils ein Platten-Paket flachseitig aneinander anliegende Andrückplatten aufweisen, die in einem Anlegebereich schmalseitig am Rohrzuschnitt anliegen und gegen den Rohrzuschnitt andrückbar sind, wobei die Platten-Pakete im Anlegebereich an die Außenkontur des Rohrzuschnittes angepasst sind, gemäss dem Oberbegriff des Anspruchs 1.The invention relates to a device for producing tubes made of thin-walled material, in particular of sheet metal, with a clamping device which has clamping jaws arranged on opposite sides of the tube blank and pressable against the tube blank for holding a tube-shaped preformed tube blank in the welding position. Package flat side adjoining pressure plates have, which rest in a landing area narrow side of the pipe blank and are pressed against the pipe blank, the plate packages are adapted to the outer contour of the pipe blank in the landing area, according to the preamble of claim 1.

Eine solche Vorrichtung ist aus der DE-C-593 622 bekannt.Such a device is from the DE-C-593 622 known.

Man kennt bereits Vorrichtungen der eingangs erwähnten Art mit einer Spannvorrichtung, deren Spannbacken jeweils aus einer Anzahl voneinander beabstandeter Spannelemente besteht, die zum Halten eines rohrförmig vorgeformten Zuschnittes in Schweißstellung gegen den Rohrzuschnitt andrückbar sind. Da der Abstand der miteinander zu verschweißenden Seiten des Rohrzuschnittes im Bereich jedes Spannelementes geringfügig variiert, kann die Schweißnaht über die gesamte Längserstreckung insbesondere bei konturierten Rohren kaum mit der gewünschten Genauigkeit und Qualität hergestellt werden.Devices are already known of the type mentioned above with a clamping device, the clamping jaws each consisting of a number of spaced-apart clamping elements, which are pressed to hold a tubular preformed blank in welding position against the pipe blank. Since the distance of the sides of the tube blank to be welded together varies slightly in the region of each clamping element, the weld can in particular over the entire longitudinal extent can hardly be produced with the desired accuracy and quality in contoured tubes.

Man hat auch bereits Vorrichtungen mit einer Spannvorrichtung geschaffen, die auf gegenüberliegenden Seiten des Rohrzuschnittes paarweise einander angeordnete Andrückrollen aufweist. Da der Rohrzuschnitt nur tangential an diesen Andrückrollen anliegt, können die Andrückrollen den Rohrzuschnitt derart zwischen sich einspannen, dass die miteinander zu verschweißenden Seiten des Rohrzuschnitts im Schweißbereich gleichmäßig aneinander anliegen und eine gleichmäßige Schweißnaht entsteht. Solche Andrückrollen sind jedoch bei konturierten Rohrzuschnitten nicht anwendbar, die über die Längserstreckung des Rohres unterschiedliche Außendurchmesser aufweisen.It has also already created devices with a clamping device, which has on opposite sides of the pipe blank pairs arranged pressure rollers. Since the pipe blank rests only tangentially on these pressure rollers, the pressure rollers can clamp the pipe blank between them such that the sides of the pipe blank to be welded together in the welding area abut each other evenly and a uniform weld is formed. However, such pressure rollers are not applicable to contoured pipe blanks, which have different outer diameters over the longitudinal extent of the tube.

Aus der DE-C 593 622 kennt man bereits eine Vorrichtung zur Herstellung von konischen Rohren, die, nachdem sie entsprechend zugeschnitten sind, auf der ganzen Länge gleichzeitig zum Rohr gerollt werden. Die vorbekannte Vorrichtung umfasst eine Spannvorrichtung, die auf gegenüberliegenden Seiten des Rohrzuschnittes andrückbare Spannbacken zum Halten eines rohrförmigen vorgeformten Rohrzuschnittes in Schweißstellung hat. Diese Spannbacken tragen stählerne Formscheiben, die abnehmende, dem konischen Rohr entsprechende Aussparungen besitzen. Je nach der Stärke der zu bearbeitenden Blechstreifen können die an den Spannbacken gehaltenen Formscheiben in kürzeren oder längeren Zwischenräumen voneinander aufgestellt und in ihren Abständen voneinander derart beliebig geändert werden, dass an jeder Spannbacke jeweils ein an die Außenkontur des Rohrzuschnittes angepasstes Platten-Paket aus flachseitig aneinander anliegenden und das konische Rohr schmalseitig beaufschlagenden Formscheiben vorstellbar ist. Das Ausrichten der Spannbacken und das Einrichten des zwischen den Formscheiben benötigten Abstandes erfordert jedoch einen erheblichen Justageaufwand, sobald die vorbekannte Vorrichtung auf eine bestimmte Rohrkontur festgelegt werden soll.From the DE-C 593 622 One already knows a device for the production of conical tubes, which, after being cut to size, are rolled along the entire length simultaneously to the tube. The known device comprises a tensioning device which has clamping jaws which can be pressed on opposite sides of the pipe blank for holding a tubular preformed pipe blank in the welding position. These jaws carry steel forming discs which have decreasing recesses corresponding to the conical tube. Depending on the strength of the metal strip to be processed held on the clamping jaws formed discs can be placed in shorter or longer intervals from each other and their distances from each other changed as desired, that at each jaw each adapted to the outer contour of the pipe blank plate package from flat side to each other adjacent and the conical tube narrow side acting shaping disks is conceivable. Aligning the jaws and setting up the between However, the spacing required for the shaped disks requires considerable adjustment effort as soon as the previously known device is to be fixed to a specific pipe contour.

Aus der DE 198 27 798 A1 ist eine Vorrichtung zur Herstellung von längsnahtgeschweißten Rohren aus Blechzuschnitten mit parallelen Längskanten bekannt. Die vorbekannte Vorrichtung weist eine Spanneinrichtung mit zwei einander zugeordneten Formwerkzeughälften auf, zwischen die der zum Rohr zu verarbeitende Blechzuschnitt derart eingeschoben werden kann, dass die im Scheitelpunkt der Formwerkzeuge aus den Formspalten austretenden Längskanten unter Bildung eines Stumpfstoßes in Schweißposition gehalten werden können, bis eine über den Fügespalt verfahrbare Schweißvorrichtung diese Längskanten miteinander verschweißt. Die die Formwerkzeughälften umfassende Spanneinrichtung ist jedoch auf einen bestimmten Rohrdurchmesser festgelegt.From the DE 198 27 798 A1 a device for the production of longitudinally welded pipes from sheet metal blanks with parallel longitudinal edges is known. The previously known device has a clamping device with two mutually associated mold halves, between which the tube to be processed sheet metal blank can be inserted so that the emerging at the apex of the molds from the mold gaps longitudinal edges can be kept in the welding position to form a butt joint until a via The welding gap movable welding device these longitudinal edges welded together. However, the clamping device comprising the mold halves is fixed to a specific pipe diameter.

In der US-A-3 433 043 ist eine Vorrichtung zur Herstellung eines rohrförmigen Elementes aus einem langen Metallband beschrieben. Zum Umformen des Metallbandes weist die vorbekannte Vorrichtung eine Matrize mit einem Innenkanal auf, in welcher das Band während seiner Bewegung in Längsrichtung in Querrichtung gebogen wird. Um mit nur einer Matrize einen größeren Bereich von Durchmessern formen zu können, besteht die Matrize der aus US-A-3 433 043 vorbekannten Vorrichtung aus einer Anzahl einander anliegender Lamellen, die zum Anpassen der Form des Innenkanals auf dem Durchmesser des rohrförmigen Elementes einstellbar angeordnet und mit Hilfe von Flachstäben, welche die ausliegenden Lamellen beaufschlagen, festlegbar sind. In der US-A-3 433 043 ist also eine zum Umformen eines Metallbandes bestimmte Matrize vorbeschrieben. Mit Hilfe der vorbekannten Umform-Matrize können lediglich Rohre mit einem konstanten Querschnitt in einem kontinuierlichen Prozess hergestellt werden.In the US-A-3,433,043 An apparatus for producing a tubular element from a long metal strip is described. For forming the metal strip, the known device has a die with an inner channel, in which the strip is bent in the transverse direction during its movement in the longitudinal direction. In order to be able to form a larger range of diameters with only one die, the die consists of the US-A-3,433,043 previously known device of a number of adjoining slats, which are arranged to adjust the shape of the inner channel on the diameter of the tubular element adjustable and with the aid of flat bars, which act on the outboard slats, can be fixed. In the US-A-3,433,043 Thus, a die intended for forming a metal strip is described above. With the help of the prior art forming die only tubes with a constant cross section in a continuous Process be prepared.

Es besteht daher insbesondere die Aufgabe, eine konstruktiv einfache und mit geringem Aufwand herstellbare Vorrichtung der eingangs erwähnten Art zu schaffen, mit der auch bei derart konturierten Rohrzuschnitten eine gleichmäßige Schweißnaht erreichbar ist.There is therefore in particular the task of creating a structurally simple and producible with little effort device of the type mentioned, with the even with such contoured pipe blanks a uniform weld can be achieved.

Die erfindungsgemäße Lösung dieser Aufgabe besteht bei der Vorrichtung der eingangs erwähnten Art insbesondere darin, dass die Vorrichtung eine Schweißmaschine zum Längsnahtschweißen hat und dass die Spannbacken jeweils mittels zumindest einer Andrückrolle gegen den Rohrzuschnitt andrückbar sind, welche Andrückrollen die Andrückplatten auf ihrer dem Anlegebereich abgewandten Schmalseite druckbeaufschlagen.The inventive solution to this problem is in the device of the type mentioned in particular that the device has a welding machine for longitudinal seam welding and that the clamping jaws are pressed by at least one pressure roller against the pipe blank, which pressure rollers pressurize the pressure plates on their side facing away from the landing side narrow side ,

Die erfindungsgemäße Vorrichtung hat eine Spannvorrichtung, deren auf gegenüberliegenden Seiten des Rohrzuschnittes angeordnete Spannbacken jeweils ein Platten-Paket flachseitig aneinander anliegender Andrückplatten aufweisen. Diese Platten-Pakete sind in einem Anlegebereich derart an die Außenkontur des Rohrzuschnittes angepasst, dass die Andrückplatten dort schmalseitig am Rohrzuschnitt anliegen. Die Spannvorrichtung der erfindungsgemäßen Vorrichtung mit ihren aus einer Vielzahl von Andrückplatten gebildeten Platten-Paketen gewährleistet, dass die miteinander zu verschweißenden Seiten auch eines konturierten Rohrzuschnittes über die gesamte Längserstreckung gleichmäßig aneinander anliegen. Um eine radiale und entsprechend hohe Andrückkraft über die jeweils beaufschlagte Andrückplatte der Platten-Pakete auf den Rohrzuschnitt übertragen zu können, sind die Spannbacken jeweils mittels zumindest einer Andrückrolle gegen den Rohrzuschnitt andrückbar, wobei die Andrückrollen die Andrückplatten auf ihrer dem Anlegebereich abgewandten Schmalseite beaufschlagen. Die in der erfindungsgemäßen vorrichtung hergestellten Rohre zeichnen sich somit durch eine stets gleichmäßig belastbare Schweißnaht aus.The device according to the invention has a tensioning device, the clamping jaws of which are arranged on opposite sides of the tube blank in each case have a plate packet on the flat side of abutting pressure plates. These plate packages are adapted to the outer contour of the pipe blank in a landing area such that the pressure plates lie there on the narrow side of the pipe blank. The tensioning device of the device according to the invention, with its plate packages formed from a plurality of pressure plates, ensures that the sides to be welded together, even of a contoured tube blank, rest uniformly against one another over the entire longitudinal extent. In order to transmit a radial and correspondingly high pressure force on the respectively applied pressure plate of the plate packages on the pipe blank, the clamping jaws are pressed by means of at least one pressure roller against the pipe blank, wherein the pressure rollers act on the pressure plates on their side facing away from the landing narrow side. The pipes produced in the device according to the invention are thus characterized by a weld seam which can always be subjected to a uniform load.

Um die miteinander zu verschweißenden Seiten des Rohrzuschnittes im Bereich des Schweißpunktes der Schweißmaschine gleichmäßig aneinander anlegen zu können, ist es vorteilhaft, wenn die Andrückplatten jeweils eine Plattendicke aufweisen, die etwa der Breite des durch den Schweißpunkt der Schweißmaschine jeweils punktförmig erweichten Rohrmaterials entspricht.In order to be able to uniformly abut the sides of the pipe blank to be welded together in the area of the welding point of the welding machine, it is advantageous if the pressure plates each have a plate thickness which approximately corresponds to the width of the pipe material softened by the welding point of the welding machine.

Um hoch belastbare Andrückplatten mit geringem Aufwand beispielsweise als Laserzuschnitt herstellen zu können, ist es vorteilhaft, wenn die Andrückplatten jeweils aus einem Blechzuschnitt gebildet sind.In order to produce high loadable pressure plates with little effort, for example as a laser blank, it is advantageous if the pressure plates are each formed from a sheet metal blank.

Die aus einer Vielzahl von Andrückplatten gebildeten Platten-Pakete lassen sich einfach und rasch relativ zum Rohrzuschnitt bewegen, wenn die Spannbacken jeweils eine Spannleiste aufweisen, an der das dieser Spannbacke zugeordnete Platten-Paket gehalten ist.The plate packages formed from a plurality of Andrückplatten can be easily and quickly move relative to the pipe blank when the jaws each have a clamping bar on which the clamping jaw associated plate package is held.

Dabei sieht eine bevorzugte Ausführungsform gemäß der Erfindung vor, dass die Spannleisten der gegenüberliegenden Spannbacken zwischen sich die Schweißnaht begrenzen.In this case, a preferred embodiment according to the invention provides that the clamping strips of the opposing clamping jaws define the weld therebetween.

Um eine möglichst hohe Andrückkraft über die Spannbacken auf den Rohrzuschnitt aufbringen zu können, ist es vorteilhaft, wenn die Andrückrollen jeweils mittels eines zweiarmigen Kniehebels gegen die Spannbacken andrückbar sind, an dessen der Andrückrolle abgewandten Armende ein Druckzylinder oder dergleichen Druckgeber angreift.In order to apply the highest possible pressing force on the jaws on the pipe blank, it is advantageous if the pressure rollers are pressed respectively by means of a two-armed toggle lever against the clamping jaws, facing away from the pressure roller arm end of a pressure cylinder or the like pressure transducer.

Weitere Merkmale der Erfindung ergeben sich aus der folgenden Beschreibung erfindungsgemäßer Ausführungsbeispiele in Verbindung mit den Ansprüchen sowie der Zeichnung. Die einzelnen Merkmale können je für sich oder zu mehreren bei einer Ausführungsform gemäß der Erfindung verwirklicht sein.Further features of the invention will become apparent from the following description of inventive embodiments in conjunction with the claims and the drawings. The individual features may be implemented individually or in combination in an embodiment according to the invention.

Es zeigt:

Fig. 1
eine Vorrichtung zum Herstellen von Rohren aus einem dünnwandigen vorgeformten Rohrzuschnitt in einer Vorderansicht,
Fig. 2
die Vorrichtung aus Fig.1 in einer Seitenansicht, und
Fig. 3
die Vorrichtung aus Figur 1 und 2 in einer Draufsicht.
It shows:
Fig. 1
a device for producing pipes from a thin-walled preformed pipe blank in a front view,
Fig. 2
the device off Fig.1 in a side view, and
Fig. 3
the device off FIGS. 1 and 2 in a top view.

In den Figuren 1 bis 3 ist eine Vorrichtung 1 zum Herstellen von Rohren aus dünnwandigem Material, insbesondere aus Blechen, in verschiedenen Ansichten dargestellt.In the FIGS. 1 to 3 is a device 1 for producing pipes made of thin-walled material, in particular of sheets, shown in different views.

Die Vorrichtung 1 weist eine hier nicht weiter dargestellte Stumpfnahtschweißmaschine zum Längsnahtschweißen sowie eine Spannvorrichtung 2 auf, die zum Halten eines rohrförmig vorgeformten Materialzuschnittes 3 in Schweißstellung bestimmt ist.The device 1 has a butt seam welding machine, not shown here, for longitudinal seam welding and a clamping device 2, which is intended to hold a tubular preformed material blank 3 in the welding position.

Die Spannvorrichtung 2 hat auf gegenüberliegenden Seiten des Rohrzuschnittes 3 angeordnete Spannbacken 4, die gegen den Rohrzuschnitt 3 andrückbar sind. Die Spannbacken 4 weisen jeweils ein Platten-Paket flachseitig aneinander anliegender Andrückplatten 5 auf, die in einem Anlegebereich 6 schmalseitig am Rohrzuschnitt 3 anliegen. Wie aus einem Vergleich der Figuren 1 bis 3 deutlich wird, sind die Platten-Pakete in diesem Anlegebereich 6 an die konturierte Außenkontur des über seine Längserstreckung unterschiedliche Außendurchmesser aufweisenden Rohrzuschnitts 3 angepasst.The clamping device 2 has arranged on opposite sides of the pipe blank 3 clamping jaws 4, which are pressed against the pipe blank 3. The clamping jaws 4 each have a plate package on flat side abutting pressure plates 5, which rest in a landing area 6 narrow side of the pipe blank 3. As if from a comparison of FIGS. 1 to 3 becomes clear, the plate packages are adapted in this application area 6 to the contoured outer contour of the outer blank over its longitudinal extent different diameter tube blank 3.

Um die miteinander zu verschweißenden Seiten 7, 8 des Rohrzuschnittes 3 in Richtung zueinander bewegen und gleichmäßig aneinander anlegen zu können, sind die Spannbacken 4 jeweils mittels einer Andrückrolle 9 gegen den Rohrzuschnitt 3 andrückbar. Die Achsen 10 der auf gegenüberliegenden Seiten des Rohrzuschnitts 3 paarweise einander zugeordneten Andrückrollen 9 sind in einer quer zur Längserstreckung des Rohrzuschnitts 3 befindlichen und durch den Schweißpunkt der Schweißmaschine verlaufenden Ebene angeordnet, die in Figur 2 und 3 durch die Linie L angedeutet ist. Dabei werden die Andrückplatten 5 auf ihrer dem Anlegebereich 6 abgewandten Schmalseite von den Andrückrollen 9 druckbeaufschlagt. Die Andrückrollen 9 übertragen ihre radial wirkende Andrückkraft somit jeweils auf diejenigen Andrückplatten 5, die in der Ebene L des Schweißpunkts der Schweißmaschine liegen.In order to move the sides 7, 8 of the tube blank 3 to be welded together in the direction towards each other and to be able to apply them to one another uniformly, the clamping jaws 4 can each be pressed against the tube blank 3 by means of a pressure roller 9. The axes 10 of the opposing sides of the pipe blank 3 in pairs mutually associated pressure rollers 9 are arranged in a transverse to the longitudinal extent of the pipe blank 3 and extending through the welding point of the welding machine level, in FIGS. 2 and 3 is indicated by the line L. In this case, the pressure plates 5 are pressurized on their side facing away from the landing area 6 narrow side of the pressure rollers 9. The pressure rollers 9 thus transfer their radially acting pressure force in each case to those pressure plates 5, which lie in the plane L of the welding point of the welding machine.

Dabei sind die Platten-Pakete in hier nicht dargestellter Weise jeweils an einander zugeordneten massiven Spannleisten 11 gehalten. Die auf gegenüberliegenden Seiten des Rohrzuschrittes 3 paarweise einander zugeordneten Spannleisten 11 begrenzen zwischen sich die Längsschweißnaht 12.The plate packages are not shown here Way each held on mutually associated massive clamping strips 11. The on opposite sides of the Rohrzuschrittes 3 pairs associated clamping bars 11 define between them the longitudinal weld 12th

Die Andrückplatten 5 weisen dazu eine gelenkförmige Ausformung 13 auf, mit der die Andrückplatten 5 in einer komplementär geformten gelenkpfannenförmigen Aussparung in der zugeordneten Spannleiste 11 eingefädelt sind. Diese Verbindung zwischen den ein Platten-Paket bildenden Andrückplatten 5 einerseits und der zugeordneten Spannleiste 11 andererseits bildet ein achsenloses Scharnier 14.For this purpose, the pressure plates 5 have a joint-shaped formation 13, with which the pressure plates 5 are threaded in a complementary shaped joint pan-shaped recess in the associated tensioning strip 11. This connection between the plate-forming a pressure plate 5 on the one hand and the associated clamping bar 11 on the other hand forms an axisless hinge fourteenth

Um die miteinander zu verschweißenden Seiten 7, 8 des Rohrzuschnitts auch in radialer Richtung zueinander ausrichten zu können, sind die Seiten 7, 8 in dem im Querschnitt T-förmigen Seitenrand 15 eines in Rohrlängsrichtung orientierten Schwertes 16 geführt, das mit Abstand vor dem Schweißpunkt der Schweißmaschine endet.In order to align the welded together sides 7, 8 of the tube blank in the radial direction to each other, the sides 7, 8 are guided in the cross-sectionally T-shaped side edge 15 of an oriented in the tube longitudinal direction sword 16, the distance from the welding point of Welding machine ends.

Aus Figur 3 wird deutlich, dass die Andrückrollen 9 jeweils an einem zweiarmigen Kniehebel 17 drehbar gelagert sind, an deren der Andrückrolle 9 abgewandten Armende ein Druckzylinder 18 angreift.Out FIG. 3 It is clear that the pressure rollers 9 are each rotatably mounted on a two-armed toggle lever 17, at the end of which the pressure roller 9 facing away from a pressure cylinder 18 engages.

Claims (6)

  1. Apparatus (1) for the manufacture of tubes from thin-walled material, particularly sheet metal, having a clamping device (2) which has clamping jaws (4) arranged on opposite sides of the tube blank (3) and adapted to be pressed against the tube blank (3) for holding a pre-formed tubular tube blank (3) in the welding position, the clamping jaws (4) comprising a stack of pressing plates (5) lying with their flat surfaces against one another, which (5) abut on the tube blank (3) at their narrow end in a contact region (6) and can be pressed against the tube blank (3), the plate stacks being adapted to the outer contour of the tube blank (3) in the contact region (6), characterised in that the apparatus (1) has a welding machine for longitudinal seam welding and in that the clamping jaws (4) can each be pressed against the tube blank (3) by means of at least one pressing roller (9), these pressing rollers (9) applying pressure to the pressing plates (5) at their narrow end remote from the contact region (6).
  2. Apparatus according to claim 1, characterised in that the pressing plates each have a plate thickness which corresponds substantially to the width of the tube material which has been softened at a particular point by the welding point of the welding machine.
  3. Apparatus according to claim 1 or 2, characterised in that the pressing plates (5) are each formed from a sheet metal blank.
  4. Apparatus according to one of claims 1 to 3, characterised in that the clamping jaws (4) each have a clamping strip (11) on which the plate stack associated with this clamping jaw (4) is held.
  5. Apparatus according to one of claims 1 to 4, characterised in that the clamping strips (11) of the opposing clamping jaws (4) define the weld seam (12) between them.
  6. Apparatus according to one of claims 1 to 5, characterised in that the pressing rollers (9) can each be pressed against the clamping jaws (4) by means of a two-armed elbowed lever (17) the arm end of which remote from the pressing roller (9) is acted upon by a pressing cylinder (18) or similar pressing means.
EP05015706A 2004-08-14 2005-07-20 Device for the manufacture of tubes Active EP1625898B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102004039577A DE102004039577B3 (en) 2004-08-14 2004-08-14 Device for producing pipes

Publications (2)

Publication Number Publication Date
EP1625898A1 EP1625898A1 (en) 2006-02-15
EP1625898B1 true EP1625898B1 (en) 2010-02-24

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EP05015706A Active EP1625898B1 (en) 2004-08-14 2005-07-20 Device for the manufacture of tubes

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US (1) US7293687B2 (en)
EP (1) EP1625898B1 (en)
AT (1) ATE458561T1 (en)
DE (2) DE102004039577B3 (en)

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DE102007018387B4 (en) * 2007-04-17 2014-09-04 Weil Engineering Gmbh Continuous welding machine for welding a pipe blank
DE102007025043B4 (en) 2007-05-29 2016-02-18 Schnelldorfer Maschinenbau Gmbh Apparatus for producing pipes of thin-walled material
WO2017029535A1 (en) * 2015-08-19 2017-02-23 Envases Universales De Mexico Sapl De Cv Metal aerosol container and method of manufacture
WO2019095098A1 (en) * 2017-11-14 2019-05-23 四川桑莱特智能电气设备股份有限公司 Exothermic welding device and exothermic welding method

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Also Published As

Publication number Publication date
ATE458561T1 (en) 2010-03-15
DE502005009072D1 (en) 2010-04-08
US20060032889A1 (en) 2006-02-16
EP1625898A1 (en) 2006-02-15
DE102004039577B3 (en) 2006-02-02
US7293687B2 (en) 2007-11-13

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