EP0649688B1 - Dual head tube bender - Google Patents

Dual head tube bender Download PDF

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Publication number
EP0649688B1
EP0649688B1 EP94114929A EP94114929A EP0649688B1 EP 0649688 B1 EP0649688 B1 EP 0649688B1 EP 94114929 A EP94114929 A EP 94114929A EP 94114929 A EP94114929 A EP 94114929A EP 0649688 B1 EP0649688 B1 EP 0649688B1
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Prior art keywords
bending
pipe
head
dual
heads
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EP94114929A
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German (de)
French (fr)
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EP0649688A1 (en
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Rigobert Dipl.-Ing. Schwarze
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D7/00—Bending rods, profiles, or tubes
    • B21D7/02—Bending rods, profiles, or tubes over a stationary forming member; by use of a swinging forming member or abutment
    • B21D7/024—Bending rods, profiles, or tubes over a stationary forming member; by use of a swinging forming member or abutment by a swinging forming member
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D7/00—Bending rods, profiles, or tubes
    • B21D7/02—Bending rods, profiles, or tubes over a stationary forming member; by use of a swinging forming member or abutment
    • B21D7/021—Construction of forming members having more than one groove

Definitions

  • the invention relates to a double-head pipe bending machine, namely a pipe bending machine with two on one Machine frame attached bending heads, according to the Preamble of claim 1.
  • the usual pipe bending machines have a machine frame a bending head with a rotatable bending template and one the tube against the bending template pressing jaw, which is attached to a swivel arm is. By swiveling the swivel arm and simultaneous rotation of the bending template becomes too bent pipe section around the bending template.
  • Double-head pipe bending machines are also known have two bending heads.
  • the pipe to be bent is on the bending templates of both bending heads and the Swivel arms with the associated jaws pivoted at the same time around the outer pipe sections to bend.
  • double-head pipe bending machines only straight tubes can be bent, but not tubes, that are already pre-bent.
  • the invention has for its object a double-head pipe bending machine to create who is able complex bending processes without retrofitting on the same Machine.
  • a double-head pipe bending machine from which the generic term of claim 1 is known from US-A-4 843 859.
  • On the A sledge is attached to the machine bed Longitudinal direction of the machine bed is movable and a Pipe holding device carries.
  • the Carrying part moved such that one of the bending heads in the Work position arrives while the other bending head away from the work position in a waiting position is in which he must remain until the Processing by the other bending head is finished.
  • the invention has for its object a double-head pipe bending machine to create the bigger one Flexibility with regard to the mobility of the two bending heads Has.
  • the double-head pipe bending machine there are two bending heads facing the same direction from that Machine frame. This direction is called the longitudinal direction designated.
  • a pipe to be bent into a Pipe holder is clamped, one of the Bending heads fed to be bent by this. After completing this first bending process, this will be Pipe released from the first bending head and the pipe holder with the cross slide in the transverse direction procedure to attach the pre - bent pipe to the to attach the second bending head that follows Bends.
  • the fact that a single pipe holder Serving both bending heads is for one complex bending process only one clamping of the pipe is required.
  • Pipe bending machine also used for mandrel bending can be, with a mandrel in the interior of the tube is pushed in, the pipe section not to be bent reinforced. Furthermore, on the bending heads Wrinkle smoothers can be used.
  • the bending heads move the pre-bent tube to the second bending head after being released from the do not hinder the first bending head, are the bending heads movable on the machine frame, for example in Longitudinal direction and / or in the transverse direction and / or in the height direction.
  • the double-head pipe bending machine has a machine bed a machine frame 10, which all components wearing. From an end wall of the machine frame 10 are two bending heads 11 and 12. Each of these Heads has a support member 13 on its top a rotatable bending template 14 carries on her Has circumference at least one bending groove into which the half of the circumference of the pipe to be bent is used becomes.
  • a pivot arm 15 is also on the support part 13 provided around the vertical axis of rotation of the bending template 14 is pivotable and a jaw 16 carries the tube 17 against the circumference of the bending template 14 presses.
  • the jaw 16 also has a groove that encompasses part of the circumference of the pipe.
  • the clamping jaw 16 is a pressing device 18 pressed against the bending template 14.
  • the unbent pipe section is supported by a slide rail 19 supported on a protruding from the support member 13 Support arm 20 is provided and a pressing device 21 are pressed laterally against the pipe can.
  • Each bending head 11, 12 is along a vertical guide 23 on the machine frame 10 movable in height. A is used to drive this vertical movement Spindle 22.
  • the bending heads can also be moved in the longitudinal direction its distance from the machine frame 10 to change. Also a movability of the bending heads 11.12 in the transverse direction, that is to say parallel to the side of the Machine frame to which they are attached is possible.
  • Fig. 1 the two bending heads 11, 12 are in the respective Pipe receiving position shown, the Swivel arms 15 are directed towards each other.
  • the bending heads are therefore mirror images of each other.
  • the bending templates 14 Since the radii of the bending templates 14 the pipe curvature determine and since the bend grooves to the pipe diameter are adapted, the bending templates 14 can easily be replaced, as well as the jaws 16.
  • the pipe holding device 25 On the machine frame 10 is the pipe holding device 25 provided on a cross slide 26.
  • the Cross slide 26 consists of a cross slide 27, the in the transverse direction of the machine frame 10 along Guide rails 28 is movable, and a longitudinal slide 29, on the cross slide along guide rails 30 is movable.
  • the Cross slide 27 or the longitudinal slide 29 also in movable in height.
  • the longitudinal slide 29 carries the Pipe holding device 25 into which the unbent pipe 17 is clamped and around the longitudinal axis of the tube is rotatable.
  • the longitudinal direction is the axial direction of the pipe holding device 25 and the transverse direction direction perpendicular to this.
  • a mandrel retraction cylinder 31 On the cross slide 26 is a mandrel retraction cylinder 31 provided, which carries a mandrel 32, which by the pipe holder 25 passes through and not part of the pipe to be bent from the inside.
  • the longitudinal slide is used when the pipe bending machine is in operation 29 moved into the rear end position. Then the pipe is clamped in the pipe holder 25.
  • the tube 17 is moved by moving the longitudinal slide 29 and the cross slide 27 laterally to the Bending template 14 of the bending head 12 created while the clamping jaw 26 and the slide rail 19 are in the Treatment position. Then the jaw 16 and the slide rail 19 pushed towards the tube 17, so that the tube between the bending template 14 and Clamping jaw 16 is clamped. Then the swivel arm 15 and the bending template 14 pivoted around the bending angle, so that the tube 17 is bent. Since that The tube is pulled, the longitudinal slide 19 advanced in the longitudinal direction.
  • Fig. 2 shows a bent tube with the double-head tube bending machine 1 are produced can.
  • This pipe has several bends in different ones Room levels on, with the individual pipe bends have different radii of curvature.
  • the plane in which the bend is made is turned the pipe holding device 25 about its longitudinal axis set.

Abstract

The tube bender (bending machine) has two bending heads (11,12) which are designed symmetrically with respect to one another and which project cantilever-fashion from a machine frame (10). A cross slide (26) which carries the tube-holding device (25) can be moved across the machine frame (10). The tube (17) is subjected to a first bending operation in a first bending head (12) and the tube-holding device (29) is then moved to the second bending head (11), where the second bending operation is carried out. A plurality of bending operations can thus be carried out in succession without having to reclamp the tube. <IMAGE>

Description

Die Erfindung betrifft eine Doppelkopf-Rohrbiegemaschine, nämlich eine Rohrbiegemaschine mit Zwei an einem Maschinengestell angebrachten Biegeköpfen, nach dem Oberbegriff des Patentanspruchs 1.The invention relates to a double-head pipe bending machine, namely a pipe bending machine with two on one Machine frame attached bending heads, according to the Preamble of claim 1.

Die üblichen Rohrbiegemaschinen weisen an einem Maschinengestell einen Biegekopf mit einer drehbaren Biegeschablone und einer das Rohr gegen die Biegeschablone drückenden Spannbacke auf, die an einem Schwenkarm angebracht ist. Durch Verschwenken des Schwenkarms und gleichzeitiges Drehen der Biegeschablone wird der zu biegende Rohrabschnitt um die Biegeschablone herumgezogen.The usual pipe bending machines have a machine frame a bending head with a rotatable bending template and one the tube against the bending template pressing jaw, which is attached to a swivel arm is. By swiveling the swivel arm and simultaneous rotation of the bending template becomes too bent pipe section around the bending template.

Bekannt sind ferner Doppelkopf-Rohrbiegemaschinen, die zwei Biegeköpfe aufweisen. Das zu biegende Rohr wird an die Biegeschablonen beider Biegeköpfe angelegt und die Schwenkarme mit den zugehörigen Spannbacken werden gleichzeitig verschwenkt, um die äußeren Rohrabschnitte zu biegen. Mit derartigen Doppelkopf-Rohrbiegemaschinen können nur gerade Rohre gebogen werden, nicht aber Rohre, die bereits vorgebogen sind.Double-head pipe bending machines are also known have two bending heads. The pipe to be bent is on the bending templates of both bending heads and the Swivel arms with the associated jaws pivoted at the same time around the outer pipe sections to bend. With such double-head pipe bending machines only straight tubes can be bent, but not tubes, that are already pre-bent.

Bei Rohrbiegemaschinen ergibt sich häufig das Problem, daß an Rohren dreidimensional mehrere Bögen in unterschiedlichen Raumebenen gebogen werden müssen. Nach dem Biegen der ersten Bögen muß dann häufig die Rohrbiegemaschine umgerüstet werden oder das Werkstück muß auf eine zweite Rohrbiegemaschine umgesetzt werden. Beide Vorgänge erfordern einen erheblichen Aufwand an Maschinenzeit und ggf. an Personal.The problem often arises with pipe bending machines that on pipes three-dimensionally several bends in different Room levels must be bent. After this The tube bending machine then often has to bend the first bends be converted or the workpiece must be a second pipe bending machine can be implemented. Both Processes require a considerable amount of machine time and possibly to staff.

Der Erfindung liegt die Aufgabe zugrunde, eine Doppelkopf-Rohrbiegemaschine zu schaffen, die imstande ist, komplexe Biegevorgänge ohne Umrüstung auf derselben Maschine durchzuführen.The invention has for its object a double-head pipe bending machine to create who is able complex bending processes without retrofitting on the same Machine.

Eine Doppelkopf-Rohrbiegemaschine, von der der Oberbegriff des Patentanspruchs 1 ausgeht, ist bekannt aus US-A-4 843 859. Bei dieser Rohrbiegemaschine sind zwei Biegeköpfe an einem gemeinsamen Tragteil angebracht, das an dem Maschinenbett in horizontaler Richtung quer zur Längsachse des Maschinenbetts verfahrbar ist. Auf dem Maschinenbett ist ein Schlitten angebracht, der in Längsrichtung des Maschinenbetts verfahrbar ist und eine Rohrhaltevorrichtung trägt. Hierbei wird jeweils das Tragteil derart bewegt, daß einer der Biegeköpfe in die Arbeitsposition gelangt, während der andere Biegekopf sich abseits von der Arbeitsposition in einer Warteposition befindet, in der er so lange verharren muß, bis die Bearbeitung durch den anderen Biegekopf beendet ist. A double-head pipe bending machine, from which the generic term of claim 1 is known from US-A-4 843 859. There are two in this pipe bending machine Bending heads attached to a common support member, the on the machine bed in the horizontal direction across Longitudinal axis of the machine bed is movable. On the A sledge is attached to the machine bed Longitudinal direction of the machine bed is movable and a Pipe holding device carries. Here is the Carrying part moved such that one of the bending heads in the Work position arrives while the other bending head away from the work position in a waiting position is in which he must remain until the Processing by the other bending head is finished.

Der Erfindung liegt die Aufgabe zugrunde, eine Doppelkopf-Rohrbiegemaschine zu schaffen, die eine größere Flexibilität bezüglich der Bewegbarkeit der beiden Biegeköpfe hat. The invention has for its object a double-head pipe bending machine to create the bigger one Flexibility with regard to the mobility of the two bending heads Has.

Die Lösung dieser Aufgabe erfolgt erfindungsgemäß mit den im Patentanspruch 1 angegebenen Merkmalen.This object is achieved with the invention the features specified in claim 1.

Bei der erfindungsgemäßen Doppelkopf-Rohrbiegemaschine stehen zwei Biegeköpfe zu derselben Richtung von dem Maschinengestell ab. Diese Richtung wird als Längsrichtung bezeichnet. Ein zu biegendes Rohr, das in eine Rohrhaltevorrichtung eingespannt ist, wird einem der Biegeköpfe zugeführt, um von diesem gebogen zu werden. Nach Beendigung dieses ersten Biegevorganges wird das Rohr von dem ersten Biegekopf freigegeben und die Rohrhaltevorrichtung wird mit dem Querschlitten in Querrichtung verfahren, um das vorgebogene Rohr an den zweiten Biegekopf anzusetzen, der den nachfolgenden Biegevorgang ausführt. Dadurch, daß eine einzige Rohrhaltevorrichtung beide Biegeköpfe bedient, ist für einen komplexen Biegevorgang ein nur einmaliges Einspannen des Rohres erforderlich.In the double-head pipe bending machine according to the invention there are two bending heads facing the same direction from that Machine frame. This direction is called the longitudinal direction designated. A pipe to be bent into a Pipe holder is clamped, one of the Bending heads fed to be bent by this. After completing this first bending process, this will be Pipe released from the first bending head and the pipe holder with the cross slide in the transverse direction procedure to attach the pre - bent pipe to the to attach the second bending head that follows Bends. The fact that a single pipe holder Serving both bending heads is for one complex bending process only one clamping of the pipe is required.

Wenn das Rohr von dem zweiten Biegekopf bearbeitet wird, kann es bereits aus der Rohrhaltevorrichtung freigegeben werden, weil die am zweiten Biegekopf vorgesehene Gleitschiene das Rohr festhält und dessen ursprüngliche Ausrichtung beibehält. Die Rohrhaltevorrichtung kann daher während des zweiten Biegevorganges in eine Übernahmeposition gefahren werden, in der sie das nächste Rohr aufnimmt.When the tube is machined by the second bending head it can already come out of the pipe holder be released because the one provided on the second bending head Slide rail holds the pipe and its original Maintains alignment. The pipe holder can therefore during the second bending process be moved into a takeover position in which they picks up the next pipe.

Ein besonderer Vorteil besteht darin, daß die erfindungsgemäße Rohrbiegemaschine auch zum Dornbiegen benutzt werden kann, wobei in das Rohrinnere ein Dorn hineingeschoben wird, der den nicht zu biegenden Rohrabschnitt verstärkt. Ferner können an den Biegeköpfen Faltenglätter benutzt werden.A particular advantage is that the invention Pipe bending machine also used for mandrel bending can be, with a mandrel in the interior of the tube is pushed in, the pipe section not to be bent reinforced. Furthermore, on the bending heads Wrinkle smoothers can be used.

Damit die Biegeköpfe das Bewegen des vorgebogenen Rohres zum zweiten Biegekopf nach dem Entlassen aus dem ersten Biegekopf nicht behindern, sind die Biegeköpfe an dem Maschinengestell verfahrbar, beispielsweise in Längsrichtung und/oder in Querrichtung und/oder in Höhenrichtung.So that the bending heads move the pre-bent tube to the second bending head after being released from the do not hinder the first bending head, are the bending heads movable on the machine frame, for example in Longitudinal direction and / or in the transverse direction and / or in the height direction.

Sämtliche Bewegungsvorgänge, die von Komponenten der Rohrbiegemaschine ausgeführt werden, sind zweckmäßigerweise von einer elektronischen Steuereinheit gesteuert, so daß für die Rohrbearbeitung keine manuellen Eingriffe erforderlich sind. Die Rohrbearbeitung erfolgt über beide Biegevorgänge hinweg vollautomatisch vom Einspannen des ungebogenen Rohres bis zum Freigeben des fertigen Rohres.All movements that are performed by components of the Pipe bending machine are expedient controlled by an electronic control unit, so that no manual intervention is required for tube processing required are. The pipe processing takes place via both bending processes fully automatically from clamping of the unbent pipe until the finished one is released Tube.

Im folgenden wird unter Bezugnahme auf die Zeichnungen ein Ausführungsbeispiel der Erfindung näher erläutert.The following is with reference to the drawings an embodiment of the invention explained in more detail.

Es zeigen:

Fig. 1
eine schematische Draufsicht der Doppelkopf-Rohrbiegemaschine und
Fig. 2
ein Beispiel eines gebogenen Rohres.
Show it:
Fig. 1
a schematic plan view of the double-head pipe bending machine and
Fig. 2
an example of a bent pipe.

Die Doppelkopf-Rohrbiegemaschine weist als Maschinenbett ein Maschinengestell 10 auf, das sämtliche Komponenten trägt. Von einer Stirnwand des Maschinengestells 10 stehen zwei Biegeköpfe 11 und 12 ab. Jeder dieser Köpfe weist ein Tragteil 13 auf, das an seiner Oberseite eine drehbare Biegeschablone 14 trägt, die an ihrem Umfang mindestens eine Biegerille aufweist, in die die eine Hälfte des Umfanges des zu biegenden Rohres eingesetzt wird. An dem Tragteil 13 ist ferner ein Schwenkarm 15 vorgesehen, der um die vertikale Drehachse der Biegeschablone 14 herum schwenkbar ist und eine Spannbacke 16 trägt, die das Rohr 17 gegen den Umfang der Biegeschablone 14 drückt. Die Spannbacke 16 weist ebenfalls eine Rille auf, die einen Teil des Rohrumfangs umgreift. Die Spannbacke 16 wird von einer Andrückvorrichtung 18 gegen die Biegeschablone 14 gedrückt.The double-head pipe bending machine has a machine bed a machine frame 10, which all components wearing. From an end wall of the machine frame 10 are two bending heads 11 and 12. Each of these Heads has a support member 13 on its top a rotatable bending template 14 carries on her Has circumference at least one bending groove into which the half of the circumference of the pipe to be bent is used becomes. A pivot arm 15 is also on the support part 13 provided around the vertical axis of rotation of the bending template 14 is pivotable and a jaw 16 carries the tube 17 against the circumference of the bending template 14 presses. The jaw 16 also has a groove that encompasses part of the circumference of the pipe. The clamping jaw 16 is a pressing device 18 pressed against the bending template 14.

Der ungebogene Rohrabschnitt wird von einer Gleitschiene 19 abgestützt, die an einem vom Tragteil 13 abstehenden Tragarm 20 vorgesehen ist und von einer Andrückvorrichtung 21 seitlich gegen das Rohr gedrückt werden kann.The unbent pipe section is supported by a slide rail 19 supported on a protruding from the support member 13 Support arm 20 is provided and a pressing device 21 are pressed laterally against the pipe can.

Jeder Biegekopf 11,12 ist entlang einer vertikalen Führung 23 am Maschinengestell 10 in der Höhe verfahrbar. Für den Antrieb dieser Vertikalbewegung dient eine Spindel 22.Each bending head 11, 12 is along a vertical guide 23 on the machine frame 10 movable in height. A is used to drive this vertical movement Spindle 22.

Ferner können die Biegeköpfe auch in Längsrichtung bewegbar sein, wobei ihr Abstand vom Maschinengestell 10 sich verändert. Auch eine Verfahrbarkeit der Biegeköpfe 11,12 in Querrichtung, also parallel zu der Seite des Maschinengestells, an der sie befestigt sind, ist möglich.Furthermore, the bending heads can also be moved in the longitudinal direction its distance from the machine frame 10 to change. Also a movability of the bending heads 11.12 in the transverse direction, that is to say parallel to the side of the Machine frame to which they are attached is possible.

In Fig. 1 sind die beiden Biegeköpfe 11,12 in der jeweiligen Rohraufnahmeposition dargestellt, wobei die Schwenkarme 15 gegeneinander gerichtet sind. Die Biegeköpfe sind also zueinander spiegelbildlich ausgebildet. Alternativ besteht auch die Möglichkeit, beide Biegeköpfe einander gleich zu machen.In Fig. 1, the two bending heads 11, 12 are in the respective Pipe receiving position shown, the Swivel arms 15 are directed towards each other. The bending heads are therefore mirror images of each other. Alternatively, it is also possible to use both bending heads to make each other the same.

Da die Radien der Biegeschablonen 14 die Rohrkrümmung bestimmen und da die Biegerillen an den Rohrdurchmesser angepaßt sind, können die Biegeschablonen 14 leicht ausgewechselt werden, ebenso wie die spannbacken 16.Since the radii of the bending templates 14 the pipe curvature determine and since the bend grooves to the pipe diameter are adapted, the bending templates 14 can easily be replaced, as well as the jaws 16.

Auf dem Maschinengestell 10 ist die Rohrhaltevorrichtung 25 auf einem Kreuzschlitten 26 vorgesehen. Der Kreuzschlitten 26 besteht aus einem Querschlitten 27, der in Querrichtung des Maschinengestells 10 entlang Führungsschienen 28 verfahrbar ist, und einem Längsschlitten 29, der auf dem Querschlitten entlang Führungsschienen 30 verfahrbar ist. Vorzugsweise ist der Querschlitten 27 oder der Längsschlitten 29 außerdem in der Höhe verfahrbar. Der Längsschlitten 29 trägt die Rohrhaltevorrichtung 25, in die das ungebogene Rohr 17 eingespannt wird und die um die Längsachse des Rohres drehbar ist.On the machine frame 10 is the pipe holding device 25 provided on a cross slide 26. Of the Cross slide 26 consists of a cross slide 27, the in the transverse direction of the machine frame 10 along Guide rails 28 is movable, and a longitudinal slide 29, on the cross slide along guide rails 30 is movable. Preferably, the Cross slide 27 or the longitudinal slide 29 also in movable in height. The longitudinal slide 29 carries the Pipe holding device 25 into which the unbent pipe 17 is clamped and around the longitudinal axis of the tube is rotatable.

Als Längsrichtung ist die Achsrichtung der Rohrhaltevorrichtung 25 bezeichnet und als Querrichtung die hierzu rechtwinklig verlaufende Richtung.The longitudinal direction is the axial direction of the pipe holding device 25 and the transverse direction direction perpendicular to this.

An dem Kreuzschlitten 26 ist ein Dornrückzugszylinder 31 vorgesehen, der einen Dorn 32 trägt, welcher durch die Rohrhaltevorrichtung 25 hindurchgeht und den nicht zu biegenden Teil des Rohres von innen her abstützt.On the cross slide 26 is a mandrel retraction cylinder 31 provided, which carries a mandrel 32, which by the pipe holder 25 passes through and not part of the pipe to be bent from the inside.

Beim Betrieb der Rohrbiegemaschine wird der Längsschlitten 29 in die rückwärtige Endposition gefahren. Dann wird das Rohr in die Rohrhaltevorrichtung 25 eingespannt. Das Rohr 17 wird durch Bewegen des Längsschlittens 29 und des Querschlittens 27 seitlich an die Biegeschablone 14 des Biegekopfes 12 angelegt, während die Spannbacke 26 und die Gleitschiene 19 sich in der Rückzugsposition befinden. Danach werden die Spannbacke 16 und die Gleitschiene 19 an das Rohr 17 herangeschoben, so daß das Rohr zwischen Biegeschablone 14 und Spannbacke 16 geklemmt wird. Dann werden der Schwenkarm 15 und die Biegeschablone 14 um den Biegewinkel herumgeschwenkt, so daß das Rohr 17 gebogen wird. Da das Rohr hierbei nachgezogen wird, wird der Längsschlitten 19 in Längsrichtung vorgeschoben. Dann werden die Spannbacke 16 und die Gleitschiene 19 vom Rohr abgezogen und beide Biegeköpfe 11 und 12 werden abgesenkt. Der Kreuzschlitten 26 wird in Querrichtung verfahren, um das vorgebogene Rohr an dem Biegekopf 11 zu positionieren. Der Längsschlitten 29 wird vorgefahren, um den nun zu biegenden Rohrabschnitt in die Biegeposition zu bringen. Dann wird der Biegekopf 11 hochgefahren und das Rohr wird zwischen Biegeschablone 14 und Spannbacke 16 des Biegekopfes 11 eingespannt. Danach erfolgt der Biegevorgang an dem Biegekopf 11 durch gleichzeitiges Drehen der Biegeschablone 14 und Verschwenken des Schwenkarms 15.The longitudinal slide is used when the pipe bending machine is in operation 29 moved into the rear end position. Then the pipe is clamped in the pipe holder 25. The tube 17 is moved by moving the longitudinal slide 29 and the cross slide 27 laterally to the Bending template 14 of the bending head 12 created while the clamping jaw 26 and the slide rail 19 are in the Retreat position. Then the jaw 16 and the slide rail 19 pushed towards the tube 17, so that the tube between the bending template 14 and Clamping jaw 16 is clamped. Then the swivel arm 15 and the bending template 14 pivoted around the bending angle, so that the tube 17 is bent. Since that The tube is pulled, the longitudinal slide 19 advanced in the longitudinal direction. Then they will Clamping jaw 16 and the slide rail 19 are pulled off the tube and both bending heads 11 and 12 are lowered. The cross slide 26 is moved in the transverse direction, to position the pre-bent tube on the bending head 11. The longitudinal slide 29 is advanced to the pipe section to be bent into the bending position bring. Then the bending head 11 is raised and the tube is between the bending template 14 and the clamping jaw 16 of the bending head 11 clamped. Then the Bending process on the bending head 11 by simultaneous Rotate the bending template 14 and pivot the Swivel arms 15.

Während des zweiten Biegevorganges hält die Gleitschiene 19 des Biegekopfes 11 das Rohr fest, so daß das Rohr von der Rohrhaltevorrichtung 25 bereits freigegeben werden kann und der Kreuzschlitten 26 in die Ausgangsposition zurückfährt, um ein neues ungebogenes Rohr aufzunehmen.The slide rail stops during the second bending process 19 of the bending head 11, the tube firmly, so that the tube already released by the pipe holding device 25 can be and the cross slide 26 in the starting position returns to a new unbent pipe to record.

Fig. 2 zeigt ein gebogenes Rohr, das mit der Doppelkopf-Rohrbiegemaschine nach Fig. 1 hergestellt werden kann. Dieses Rohr weist mehrere Biegungen in unterschiedlichen Raumebenen auf, wobei die einzelnen Rohrbiegungen unterschiedliche Krümmungsradien haben. Die Raumebene, in der die Biegung erfolgt, wird durch Drehen der Rohrhaltevorrichtung 25 um ihre Längsachse herum eingestellt.Fig. 2 shows a bent tube with the double-head tube bending machine 1 are produced can. This pipe has several bends in different ones Room levels on, with the individual pipe bends have different radii of curvature. The The plane in which the bend is made is turned the pipe holding device 25 about its longitudinal axis set.

Claims (7)

  1. A dual-head pipe bending machine comprising a machine frame (10) supporting two cantilever-like bending heads (11,12) each of which comprises a rotatable bending template (14) and a pivot arm (15) with a clamping jaw (16) cooperating with the bending template (14), and comprising a single pipe holding device (25) arranged on the machine frame (10), the longitudinal axis of the pipe holding device (25) transversely passing that plane in which the axes of the bending templates (14) are located,
    characterized in
    that the pipe holding device (25) is supported on a transverse slide (27) being transversely displaceable relative to the longitudinal axis, and that each bending head (11, 12) comprises a slide rail (19) of its own as abutment for the pipe section not to be bent, wherein the pipe (17) in its respective original orientation can be acted on and held in position by the respective slide rail (19).
  2. The dual-head pipe bending machine according to claim 1, characterized in that each bending head (11,12) is vertically displaceable on the machine frame (10) in a controlled manner.
  3. The dual-head pipe bending machine according to claim 1 or 2, characterized in that the bending heads (11,12) are displaceable in a longitudinal direction in a controlled manner.
  4. The dual-head pipe bending machine according to any one of claims 1 to 3, characterized in that the bending heads (11,12) are displaceable in a transverse direction in a controlled manner.
  5. The dual-head pipe bending machine according to any one of claims 1 to 4, characterized in that the pipe holding device (25) is mounted on a longitudinal slide (29) being displaceable in a longitudinal direction on the transverse slide (27).
  6. The dual-head pipe bending machine according to any one of claims 1 to 5, characterized in that the transverse slide (27) or the longitudinal slide (29) is displaceable in a vertical direction.
  7. The dual-head pipe bending machine according to any one of claims 1 to 6, characterized in that the pivot arms (15) of the bending heads (11,12) face each other in the pipe receiving positions and are pivotable in opposite senses of rotation.
EP94114929A 1993-10-21 1994-09-22 Dual head tube bender Expired - Lifetime EP0649688B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4335901 1993-10-21
DE4335901A DE4335901A1 (en) 1993-10-21 1993-10-21 Double-head pipe bending machine

Publications (2)

Publication Number Publication Date
EP0649688A1 EP0649688A1 (en) 1995-04-26
EP0649688B1 true EP0649688B1 (en) 1998-02-25

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EP94114929A Expired - Lifetime EP0649688B1 (en) 1993-10-21 1994-09-22 Dual head tube bender

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US (1) US5499522A (en)
EP (1) EP0649688B1 (en)
AT (1) ATE163374T1 (en)
DE (2) DE4335901A1 (en)

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Also Published As

Publication number Publication date
ATE163374T1 (en) 1998-03-15
EP0649688A1 (en) 1995-04-26
US5499522A (en) 1996-03-19
DE4335901A1 (en) 1995-04-27
DE59405297D1 (en) 1998-04-02

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