EP2329896B1 - Device for continuous corrugation of a metallic tube - Google Patents

Device for continuous corrugation of a metallic tube Download PDF

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Publication number
EP2329896B1
EP2329896B1 EP09306178A EP09306178A EP2329896B1 EP 2329896 B1 EP2329896 B1 EP 2329896B1 EP 09306178 A EP09306178 A EP 09306178A EP 09306178 A EP09306178 A EP 09306178A EP 2329896 B1 EP2329896 B1 EP 2329896B1
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EP
European Patent Office
Prior art keywords
hollow shaft
tube
tool holder
permanent magnet
corrugation
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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.)
Not-in-force
Application number
EP09306178A
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German (de)
French (fr)
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EP2329896A1 (en
Inventor
Wilhelm Unger
Volker Zummach
Claus Friedrich Theune
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Nexans SA
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Nexans SA
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Publication date
Application filed by Nexans SA filed Critical Nexans SA
Priority to EP09306178A priority Critical patent/EP2329896B1/en
Priority to AT09306178T priority patent/ATE544537T1/en
Priority to US12/956,078 priority patent/US8631672B2/en
Priority to KR1020100123094A priority patent/KR20110063385A/en
Priority to CN201010625186.1A priority patent/CN102179436B/en
Publication of EP2329896A1 publication Critical patent/EP2329896A1/en
Application granted granted Critical
Publication of EP2329896B1 publication Critical patent/EP2329896B1/en
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Anticipated expiration legal-status Critical

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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
    • B21D15/00—Corrugating tubes
    • B21D15/04—Corrugating tubes transversely, e.g. helically

Definitions

  • the invention relates to a device for continuously corrugating a metallic tube, which rotates about a first smooth tube around rotatable tool holder with a off-center mounted to the pipe tool that presses during operation of the device a transverse to the longitudinal direction of the tube curl in the same, and a withdrawal device for moving the tube in its longitudinal direction, wherein at the tool holder in the withdrawal direction of the same projecting first hollow shaft is fixed, which encloses the tube after the corrugation and is rotatable together with the tool holder by an electric motor about its axis, and in which the unit from tool holder and first hollow shaft is displaceably mounted in the axial direction ( EP 1 084 774 B1 ).
  • Such tubes are on the one hand well bendable because of the corrugation and on the other hand stable against radially acting on them Krissern. They can be used to transport fluid media, but can also be used as coats or conductors for electrical and / or optical cables. As the protection of a cable core serving coat a corresponding tube made of steel. As a conductor, it is used with advantage in high-frequency cables. It then consists with advantage of copper.
  • the first hollow shaft fastened to the tool holder simultaneously forms the rotor of the driving electric motor, the stator of which is attached to the structures of the device.
  • the first hollow shaft is rotated as part of the electric motor about its axis.
  • She takes with her firmly connected tool holder, whose tool the curl in the continuous in his Axial direction through the tool holder through moving tube pushes.
  • the tool holder with connected hollow shaft and the stator of the electric motor are combined in this known device into a unit which is movably mounted in the axial direction.
  • the weight of the unit described is relatively high, so that a relatively high effort is required for easy displacement of the same.
  • the invention has for its object to make the above-described device easier and easier, with higher speeds should be achievable for the rotation of the tool holder.
  • the driving electric motor on the one hand and the unit to be rotated about its axis of tool holder and connected first hollow shaft on the other hand are mechanically decoupled.
  • the driving electric motor can be firmly and immovably mounted in the device. Possible axial movements of tool holder and first hollow shaft are compensated without repercussions on the electric motor by the arranged between the first hollow shaft and the second hollow shaft magnetic coupling. Since fewer parts are to be moved and the storage of the first hollow shaft is moved together with the same, higher-speed bearings can be used. Thereby, the rotational speed of the first hollow shaft can be increased together with the tool holder.
  • a smooth metallic tube for the corrugated process dos can be made of steel, copper or aluminum, for example. How the pipe was made is of secondary importance. It may for example be formed from a metal strip to a slot tube, the longitudinal slot extending is closed by welding, as for example in the aforementioned EP 1 084 774 B1 is described.
  • a smooth tube 1 is moved in the direction of the arrow 3 in its longitudinal direction by means of a deduction indicated only by a box 2 and thereby moved by a device 4, in which a transverse to the longitudinal direction of the smooth tube 1 corrugation is pressed into the same.
  • the corrugated tube 5 emerging from the device 4 and moved by the discharge device 2 can be wound onto a spool 6.
  • a trigger device 2 any known trigger device can be used, for example, a caterpillar take-off or a collet trigger, as in the above-mentioned EP 1 084 774 B 1 is described.
  • the corrugation of the tube 5 may be helical or annular.
  • the structure of the device 4 is in an enlarged view, for example Fig. 2 out:
  • the device 4 has a frame 7, which is displaceable for example by means of a not shown with cylindrical roller or linear guide within a frame 8 in the direction of the double arrow 9.
  • a frame 7 On the frame 7, two bearings 10 and 11 are mounted, which are designed for example as a rolling bearing.
  • a first hollow shaft 12 At the two positions 10 and 1, a first hollow shaft 12 is rotatably mounted about its axis.
  • the first hollow shaft 12 is fixedly connected at its one axial end to a tool holder 13, which has an eccentrically mounted to the tube 1 tool 14, which presses a corrugation in the tube 1 during operation of the device in a continuous flow.
  • a tool holder 13 which has an eccentrically mounted to the tube 1 tool 14, which presses a corrugation in the tube 1 during operation of the device in a continuous flow.
  • the withdrawal direction (arrow 3 in Fig. 1 ) is behind the tool 14, the corrugated tube 5 before.
  • the corrugation possibly occurring tolerances are compensated by the axial mobility of the frame 7, with which only the first hollow shaft 12 and the tool holder 13 are moved together.
  • a same surrounding first, annular permanent magnet 15 is fixedly mounted.
  • a second hollow shaft 16 is arranged, which is mounted concentrically to the first hollow shaft 12 about its axis rotatable.
  • two bearing points 17 and 18 are mounted on the frame 8 of the device 4, which may be performed again as a rolling bearing.
  • a second, annular permanent magnet 19 is fixed within the second hollow shaft 16, which surrounds the first permanent magnet 15 all around and is separated in the mounting position by an air gap 20 thereof.
  • Fig. 3 schematically shows a section through the magnetic coupling formed by the permanent magnets 15 and 19.
  • the second hollow shaft 16 is connected for example by means of a V-belt with an electric motor, not shown, through which it is rotated during the operation of the device 4 about its axis.
  • the rotating about its axis second hollow shaft 16 takes over the magnetic sleeve formed by the two permanent magnets 15 and 19 with the first hollow shaft 12, which together with the tool holder 13 with the same number of revolutions as the second hollow shaft 16 about its axis and thus to the smooth Tube 1 is rotated.
  • the electric motor driving the two hollow shafts 12 and 16 is mechanically decoupled from the first hollow shaft 12 and thus from the tool holder 13 by the magnetic coupling.
  • the possible by the movably mounted frame 7 axial movements of the first hollow shaft 12 including tool holder 13 are therefore not transmitted to the second hollow shaft 16 and the electric motor.
  • the two permanent magnets 15 and 19 are advantageously different in width in the axial direction, so that their position relative to each other is stable. But they also build in the only small, required for displacement of the first hollow shaft 12 area practically no forces acting in the axial direction, so that the axial mobility of the first hollow shaft 12 is not hindered.
  • the first permanent magnet 15 in the axial direction is shorter or narrower than the second permanent magnet 19. However, it could also be the first permanent magnet 15 wider than the second permanent magnet 19 executed.

Abstract

The device has a tool retainer (13) provided opposite to an end of a hollow shaft (12), where the hollow shaft is arranged at a distance to another hollow shaft (16). A magnet coupling is attached between the both hollow shafts. The magnet coupling has two permanent magnets (15,19).

Description

Die Erfindung bezieht sich auf eine Vorrichtung zum kontinuierlichen Wellen eines metallischen Rohres, welche eine um das zunächst glatte Rohr herum drehbare Werkzeugaufnahme mit einem außermittig zum Rohr gelagerten Werkzeug, das beim Betrieb der Vorrichtung eine quer zur Längsrichtung des Rohres verlaufende Wellung in dasselbe eindrückt, und eine Abzugseinrichtung zum Bewegen des Rohres in seiner Längsrichtung aufweist, bei welcher an der Werkzeugaufnahme eine in Abzugsrichtung von derselben abstehende erste Hohlwelle befestigt ist, welche das Rohr nach dem Wellvorgang umschließt und zusammen mit der Werkzeugaufnahme durch einen Elektromotor um ihre Achse drehbar ist, und in welcher die Einheit aus werkzeugaufnahme und erster Hohlwelle in axialer Richtung verschiebbar gelagert ist ( EP 1 084 774 B1 ).The invention relates to a device for continuously corrugating a metallic tube, which rotates about a first smooth tube around rotatable tool holder with a off-center mounted to the pipe tool that presses during operation of the device a transverse to the longitudinal direction of the tube curl in the same, and a withdrawal device for moving the tube in its longitudinal direction, wherein at the tool holder in the withdrawal direction of the same projecting first hollow shaft is fixed, which encloses the tube after the corrugation and is rotatable together with the tool holder by an electric motor about its axis, and in which the unit from tool holder and first hollow shaft is displaceably mounted in the axial direction ( EP 1 084 774 B1 ).

Derartige Rohre sind wegen der Wellung einerseits gut biegbar und andererseits stabil gegenüber in radialer Richtung auf sie einwirkenden Kröften. Sie können zum Transport fluider Medien eingesetzt werden, aber auch als Mäntel oder Leiter für elektrische und/oder optische Kabel verwendet werden. Als dem Schutz einer Kabelseele dienender Mantel kann ein entsprechendes Rohr aus Stahl bestehen. Als Leiter wird es mit Vorteil in Hochfrequenzkabeln verwendet. Es besteht dann mit Vorteil aus Kupfer.Such tubes are on the one hand well bendable because of the corrugation and on the other hand stable against radially acting on them Kröften. They can be used to transport fluid media, but can also be used as coats or conductors for electrical and / or optical cables. As the protection of a cable core serving coat a corresponding tube made of steel. As a conductor, it is used with advantage in high-frequency cables. It then consists with advantage of copper.

Bei der Vorrichtung nach der eingangs erwähnten EP 1 084 774 B1 bildet die an der Werkzeugaufnahme befestigte erste Hohlwelle gleichzeitig den Rotor des antreibenden Elektromotors, dessen Stator an Aufbauten der Vorrichtung angebracht ist. Im Betrieb der Vorrichtung wird somit die erste Hohlwelle als Teil des Elektromotor um ihre Achse gedreht. Dabei nimmt sie die mit ihr fest verbundene Werkzeugaufnahme mit, deren Werkzeug die Wellung in das kontinuierlich in seiner Achsrichtung durch die Werkzeugaufnahme hindurch bewegte Rohr eindrückt. Die Werkzeugaufnahme mit angeschlossener Hohlwelle sowie der Stator des Elektromotors sind in dieser bekannten Vorrichtung zu einer Einheit zusammengefaßt, die in axialer Richtung beweglich gelagert ist. Dadurch können Abweichungen des Wellers von einer vorgegebenen Mittellage ausgeglichen werden, die während der kontinuierlichen Fertigung auftreten können. Das Gewicht der beschriebenen Einheit ist relativ hoch, so daß für eine leichte Verschiebbarkeit derselben ein relativ hoher Aufwand erforderlich ist.In the device according to the above-mentioned EP 1 084 774 B1, the first hollow shaft fastened to the tool holder simultaneously forms the rotor of the driving electric motor, the stator of which is attached to the structures of the device. During operation of the device thus the first hollow shaft is rotated as part of the electric motor about its axis. She takes with her firmly connected tool holder, whose tool the curl in the continuous in his Axial direction through the tool holder through moving tube pushes. The tool holder with connected hollow shaft and the stator of the electric motor are combined in this known device into a unit which is movably mounted in the axial direction. As a result, deviations of the shaft from a predetermined center position can be compensated, which can occur during continuous production. The weight of the unit described is relatively high, so that a relatively high effort is required for easy displacement of the same.

Der Erfindung liegt die Aufgabe zugrunde, die eingangs geschilderte Vorrichtung einfacher und leichter zu gestalten, wobei für die Umdrehung der Werkzeugaufnahme höhere Drehzahlen erreichbar sein sollen.The invention has for its object to make the above-described device easier and easier, with higher speeds should be achievable for the rotation of the tool holder.

Diese Aufgabe wird gemäß der Erfindung dadurch gelöst,

  • daß um das der Werkzeugaufnahme abgewandte Ende der ersten Hohlwelle koaxial und mit Abstand zu derselben eine zweite Hohlwelle angeordnet ist, die um ihre Achse drehbar gelagert und durch den Elektromotor antreibbar ist, und
  • daß zur Kraftübertragung zwischen der ersten Hohlwelle und der zweiten Hohlwelle eine aus zwei konzentrisch zueinander angeordneten, ringförmigen Dauermagneten, einem ersten Dauermagnet und einem zweiten Dauermagnet, bestehende Magnetkupplung angebracht ist, die durch einen Luftspalt voneinander getrennt sind und von denen der erste Dauermagnet außen an der ersten Hohlwelle und der zweite Dauermagnet innen an der zweiten Hohlwelle befestigt ist.
This object is achieved according to the invention characterized
  • that is arranged around the tool receiving end facing away from the first hollow shaft coaxial and at a distance from the same a second hollow shaft which is rotatably mounted about its axis and driven by the electric motor, and
  • that for transmitting power between the first hollow shaft and the second hollow shaft one of two concentrically arranged, annular permanent magnet, a first permanent magnet and a second permanent magnet, existing magnetic coupling is mounted, which are separated by an air gap and of which the first permanent magnet on the outside of the the first hollow shaft and the second permanent magnet is fixed inside the second hollow shaft.

In dieser Vorrichtung sind der antreibende Elektromotor einerseits und die um ihre Achse zu drehende Einheit aus Werkzeugaufnahme und angeschlossener erster Hohlwelle andererseits mechanisch entkoppelt. Zum Ausgleich von Toleranzen im Fertigungsprozeß müssen daher nur die Werkzeugaufnahme und die mit demselben verbundene erste Hohlwelle axial verschiebbar angeordnet sein. Das bedeutet nicht nur ein erheblich vermindertes Gewicht für die zu verschiebenden Teile, sondern auch einen vereinfachton Aufbau der Vorrichtung. Der antreibende Elektromotor kann fest und unverrückbar in der Vorrichtung montiert werden. Mögliche axiale Bewegungen von Werkzeugaufnahme und erster Hohlwelle werden ohne Rückwirkungen auf den Elektromotor durch die zwischen erster Hohlwelle und zweiter Hohlwelle angeordnete Magnetkupplung ausgeglichen. Da insgesamt weniger Teile zu verschieben sind und die Lagerung der ersten Hohlwelle zusammen mit derselben verschoben wird, können Lager mit höherer zulässiger Drehzahl eingesetzt werden. Dadurch kann die Drehzahl der ersten Hohlwelle zusammen mit der Werkzeugaufnahme erhöht werden.In this device, the driving electric motor on the one hand and the unit to be rotated about its axis of tool holder and connected first hollow shaft on the other hand are mechanically decoupled. To compensate for tolerances in the manufacturing process, therefore, only the tool holder and connected to the same first hollow shaft must be arranged to be axially displaceable. This not only means a significantly reduced weight for the parts to be moved, but also a simplified structure of the device. The driving electric motor can be firmly and immovably mounted in the device. Possible axial movements of tool holder and first hollow shaft are compensated without repercussions on the electric motor by the arranged between the first hollow shaft and the second hollow shaft magnetic coupling. Since fewer parts are to be moved and the storage of the first hollow shaft is moved together with the same, higher-speed bearings can be used. Thereby, the rotational speed of the first hollow shaft can be increased together with the tool holder.

Ein Ausführungsbeispiel des Erfindungsgegenstandes ist in den Zeichnungen dargestellt.An embodiment of the subject invention is shown in the drawings.

Es zeigen:

  • Fig. 1 in schematischer Darstellung eine Vorrichtung zur Wellung eines metallischen Rohres.
  • Fig. 2 die in der Vorrichtung nach Fig. 1 eingesetzte Vorrichtung zum Wellen des Rohres in vergrößerter Darstellung.
  • Fig. 3 eine Einzelheit aus Fig. 2 im Schnitt in weiter vergrößerter Darstellung.
Show it:
  • Fig. 1 a schematic representation of a device for corrugation of a metallic tube.
  • Fig. 2 according to the device Fig. 1 used device for shafts of the tube in an enlarged view.
  • Fig. 3 a detail Fig. 2 on average in a further enlarged view.

In der folgenden Beschreibung wird von einem glatten metallischen Rohr für den Wellvorgang ausgegangen, dos beispielsweise aus Stahl, Kupfer oder Aluminium bestehen kann. Wie das Rohr hergestellt wurde, ist von untergeordneter Bedeutung. Es kann beispielsweise aus einem Metallband zu einem Schlitzrohr geformt sein, dessen in Längsrichtung verlaufender Schlitz durch Schweißen verschlossen ist, so wie es beispielsweise in der eingangs erwähnten EP 1 084 774 B1 beschrieben ist.In the following description, it is assumed that a smooth metallic tube for the corrugated process, dos can be made of steel, copper or aluminum, for example. How the pipe was made is of secondary importance. It may for example be formed from a metal strip to a slot tube, the longitudinal slot extending is closed by welding, as for example in the aforementioned EP 1 084 774 B1 is described.

Gemäß Fig. 1 wird ein glattes Rohr 1 mittels einer nur durch ein Kästchen angedeuteten Abzugseinrichtung 2 in Richtung des Pfeiles 3 in seiner Längsrichtung bewegt und dabei durch eine Vorrichtung 4 bewegt, in welcher eine quer zur Längsrichtung des glatten Rohres 1 verlaufende Wellung in dasselbe eingedrückt wird. Das aus der Vorrichtung 4 austretende und von der Abzugseinrichtung 2 bewegte gewellte Rohr 5 kann auf eine Spule 6 aufgewickelt werden. Als Abzugseinrichtung 2 kann jede bekannte Abzugseinrichtung eingesetzt werden, beispielsweise ein Raupenabzug oder ein Spannzangenabzug, wie er in der eingangs erwähnten EP 1 084 774 B 1 beschrieben ist. Die Wellung des Rohres 5 kann wendelförmig oder ringförmig ausgeführt sein.According to Fig. 1 a smooth tube 1 is moved in the direction of the arrow 3 in its longitudinal direction by means of a deduction indicated only by a box 2 and thereby moved by a device 4, in which a transverse to the longitudinal direction of the smooth tube 1 corrugation is pressed into the same. The corrugated tube 5 emerging from the device 4 and moved by the discharge device 2 can be wound onto a spool 6. As a trigger device 2, any known trigger device can be used, for example, a caterpillar take-off or a collet trigger, as in the above-mentioned EP 1 084 774 B 1 is described. The corrugation of the tube 5 may be helical or annular.

Der Aufbau der Vorrichtung 4 geht in vergrößerter Darstellung beispielsweise aus Fig. 2 hervor:The structure of the device 4 is in an enlarged view, for example Fig. 2 out:

Die Vorrichtung 4 weist einen Rahmen 7 auf, der beispielsweise mittels einer nicht mit dargestellten Zylinderrollen- oder Linearführung innerhalb eines Gestells 8 in Richtung des Doppelpfeils 9 verschiebbar ist. An dem Rahmen 7 sind zwei Lagerstellen 10 und 11 angebracht, die beispielsweise als Wälzlager ausgeführt sind. An den beiden Lagestellen 10 und 1 ist eine erste Hohlwelle 12 um ihre Achse drehbar gelagert.The device 4 has a frame 7, which is displaceable for example by means of a not shown with cylindrical roller or linear guide within a frame 8 in the direction of the double arrow 9. On the frame 7, two bearings 10 and 11 are mounted, which are designed for example as a rolling bearing. At the two positions 10 and 1, a first hollow shaft 12 is rotatably mounted about its axis.

Die erste Hohlwelle 12 ist an ihrem einen axialen Ende fest mit einer Werkzeugaufnahme 13 verbunden, welche ein außermittig zum Rohr 1 gelagertes Werkzeug 14 hat, das im Betrieb der Vorrichtung im kontinuierlichen Durchlauf eine Wellung in das Rohr 1 eindrückt. In Abzugsrichtung (Pfeil 3 in Fig. 1) liegt hinter dem Werkzeug 14 das gewellte Rohr 5 vor. Bei dem Wellvorgang möglicherweise auftretende Toleranzen werden durch die axiale Beweglichkeit des Rahmens 7 ausgeglichen, mit dem zusammen nur die erste Hohlwelle 12 und die Werkzeugaufnahme 13 bewegt werden.The first hollow shaft 12 is fixedly connected at its one axial end to a tool holder 13, which has an eccentrically mounted to the tube 1 tool 14, which presses a corrugation in the tube 1 during operation of the device in a continuous flow. In the withdrawal direction (arrow 3 in Fig. 1 ) is behind the tool 14, the corrugated tube 5 before. In the corrugation possibly occurring tolerances are compensated by the axial mobility of the frame 7, with which only the first hollow shaft 12 and the tool holder 13 are moved together.

An dem der Werkzeugaufnahme 13 abgewandten axialen Ende der ersten Hohlwelle 12 ist ein dasselbe umgebender erster, ringförmiger Dauermagnet 15 fest angebracht. Über diesem Ende der ersten Hohlwelle 12 ist eine zweite Hohlwelle 16 angeordnet, die konzentrisch zu der ersten Hohlwelle 12 um ihre Achse drehbar gelagert ist. Dazu sind am Gestell 8 der Vorrichtung 4 zwei Lagerstellen 17 und 18 angebracht, die wieder als Wälzlager ausgeführt sein können. In Höhe des ersten Dauermagnets 15 ist innerhalb der zweiten Hohlwelle 16 ein zweiter, ringförmiger Dauermagnet 19 befestigt, der den ersten Dauermagnet 15 rundum umgibt und in Montageposition durch einen Luftspalt 20 von demselben getrennt ist. Das geht so aus der vergrößerten Darstellung in Fig. 3 hervor, welche schematisch einen Schnitt durch die von den Dauermagneten 15 und 19 gebildete Magnetkupplung wiedergibt. Die zweite Hohlwelle 16 ist beispielsweise mittels eines Keilriemens mit einem nicht mit dargestellten Elektromotor verbunden, durch welchen sie wöhrend des Betriebes der Vorrichtung 4 um ihre Achse gedreht wird.At which the tool holder 13 facing away from the axial end of the first hollow shaft 12, a same surrounding first, annular permanent magnet 15 is fixedly mounted. About this end of the first hollow shaft 12, a second hollow shaft 16 is arranged, which is mounted concentrically to the first hollow shaft 12 about its axis rotatable. For this purpose, two bearing points 17 and 18 are mounted on the frame 8 of the device 4, which may be performed again as a rolling bearing. In the amount of the first permanent magnet 15, a second, annular permanent magnet 19 is fixed within the second hollow shaft 16, which surrounds the first permanent magnet 15 all around and is separated in the mounting position by an air gap 20 thereof. This goes from the enlarged view in Fig. 3 which schematically shows a section through the magnetic coupling formed by the permanent magnets 15 and 19. The second hollow shaft 16 is connected for example by means of a V-belt with an electric motor, not shown, through which it is rotated during the operation of the device 4 about its axis.

Die sich um ihre Achse drehende zweite Hohlwelle 16 nimmt über die von den beiden Dauermagneten 15 und 19 gebildete Magnetkupplung die erste Hohlwelle 12 mit, die zusammen mit der Werkzeugaufnahme 13 mit der gleichen Umdrehungszahl wie die zweite Hohlwelle 16 um ihre Achse und damit um das glatte Rohr 1 gedreht wird. Der die beiden Hohlwellen 12 und 16 antreibende Elektromotor ist durch die Magnetkupplung mechanisch von der ersten Hohlwelle 12 und damit von der Werkzeugaufnahme 13 entkoppelt. Die durch den beweglich gelagerten Rahmen 7 möglichen axialen Bewegungen der ersten Hohlwelle 12 einschließlich Werkzeugaufnahme 13 werden daher nicht auf die zweite Hohlwelle 16 und den Elektromotor übertragen.The rotating about its axis second hollow shaft 16 takes over the magnetic sleeve formed by the two permanent magnets 15 and 19 with the first hollow shaft 12, which together with the tool holder 13 with the same number of revolutions as the second hollow shaft 16 about its axis and thus to the smooth Tube 1 is rotated. The electric motor driving the two hollow shafts 12 and 16 is mechanically decoupled from the first hollow shaft 12 and thus from the tool holder 13 by the magnetic coupling. The possible by the movably mounted frame 7 axial movements of the first hollow shaft 12 including tool holder 13 are therefore not transmitted to the second hollow shaft 16 and the electric motor.

Die beiden Dauermagnete 15 und 19 sind mit Vorteil in axialer Richtung unterschiedlich breit, damit ihre Lage relativ zueinander stabil ist. Sie bauen dadurch aber auch in dem nur kleinen, zur Verschiebung der ersten Hohlwelle 12 erforderlichen Bereich praktisch keine in axialer Richtung wirkenden Kräfte auf, so daß die axiale Beweglichkeit der ersten Hohlwelle 12 nicht behindert wird. In diesem Sinne ist im dargestellten Ausführungsbeispiel der erste Dauermagnet 15 in axialer Richtung kürzer bzw. schmaler als der zweite Dauermagnet 19. Es könnte aber auch der erste Dauermagnet 15 breiter als der zweite Dauermagnet 19 ausgeführt sein.The two permanent magnets 15 and 19 are advantageously different in width in the axial direction, so that their position relative to each other is stable. But they also build in the only small, required for displacement of the first hollow shaft 12 area practically no forces acting in the axial direction, so that the axial mobility of the first hollow shaft 12 is not hindered. In this sense, in the illustrated embodiment, the first permanent magnet 15 in the axial direction is shorter or narrower than the second permanent magnet 19. However, it could also be the first permanent magnet 15 wider than the second permanent magnet 19 executed.

Claims (2)

  1. Apparatus for continuous corrugating of a metallic tube (1), which apparatus has a toolholder(13), which can rotate about the initially smooth tube and has a tool (14) which is mounted eccentrically with respect to the tube and forces a corrugation into the tube during operation of the apparatus, which corrugation runs transversely with respect to the longitudinal direction of the tube, and which apparatus has a withdrawal device for movement of the tube in its longitudinal direction, in which a first hollow shaft is attached to the tool holder (13), projects in the pulling-off direction from it, surrounds the tub after the corrugation process and canbe rotated about its axis together with the tool holder (13) by an electric motor, and in which the unit comprising the tool holder (13) and the first hollow shaftismounted such that it can move in the axial direction, characterized in
    - that a second hollow shaft (16) is arrange data distance from the first hollow shaft(12)and coaxially about the end, facing a way from the tool holder (13), of the first hollow shaft (12), which second hollow shaft (16) is mounted such that it can rotate about its axis and canbe driven by the electric motor, and
    - that, in order to transmit force between the first hollow shaft (12) and the second hollow shaft (16), a magnetic coupling is fitted, which consists of two annular permanent magnets, which are arranged concentrically with respect to one another, a first permanent magnet (15) and a second permanent magnet (19), which permanent magnets are separated from one another by an air gap, and of which the first permanent magnet (15) is attached on the outside to the first hollow shaft(12) and the second permanent magnet (19) is attached on the inside to the se c o nd hollow shaft (16).
  2. Apparatus according to claim 1, characterized in that the two permanent magnets (15,19) have different widths in the axial direction.
EP09306178A 2009-12-04 2009-12-04 Device for continuous corrugation of a metallic tube Not-in-force EP2329896B1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP09306178A EP2329896B1 (en) 2009-12-04 2009-12-04 Device for continuous corrugation of a metallic tube
AT09306178T ATE544537T1 (en) 2009-12-04 2009-12-04 DEVICE FOR CONTINUOUSLY CURVING A METAL TUBE
US12/956,078 US8631672B2 (en) 2009-12-04 2010-11-30 Apparatus for continuous corrugation of a metallic tube
KR1020100123094A KR20110063385A (en) 2009-12-04 2010-12-03 Apparatur for the continuous waves of a metallic tube
CN201010625186.1A CN102179436B (en) 2009-12-04 2010-12-06 Device for continuous corrugation of a metallic tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP09306178A EP2329896B1 (en) 2009-12-04 2009-12-04 Device for continuous corrugation of a metallic tube

Publications (2)

Publication Number Publication Date
EP2329896A1 EP2329896A1 (en) 2011-06-08
EP2329896B1 true EP2329896B1 (en) 2012-02-08

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EP09306178A Not-in-force EP2329896B1 (en) 2009-12-04 2009-12-04 Device for continuous corrugation of a metallic tube

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US (1) US8631672B2 (en)
EP (1) EP2329896B1 (en)
KR (1) KR20110063385A (en)
CN (1) CN102179436B (en)
AT (1) ATE544537T1 (en)

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CN103056207A (en) * 2013-01-17 2013-04-24 沈阳汇博热能设备有限公司 Large-diameter multilayer metallic corrugated pipe forming die and manufacturing method thereof

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Publication number Priority date Publication date Assignee Title
EP2821157A1 (en) * 2013-07-04 2015-01-07 Nexans Device and method for applying a corrugation to a pipe

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FR1321153A (en) * 1961-05-17 1963-03-15 Hackethal Draht & Kabelwerk Ag Machine for the continuous production of thin-walled corrugated ducts
DE1652990B1 (en) * 1961-05-17 1969-10-02 Kabel Metallwerke Ghh Device for continuous waves of thin-walled, in particular longitudinally welded, smooth tubes
GB1097709A (en) * 1965-10-27 1968-01-03 Pirelli General Cable Works Improvements in or relating to apparatus for deforming tubing
FR2514250A1 (en) * 1981-10-08 1983-04-15 Artus HANDPIECE WITH INTEGRATED MOTOR
FR2569357B1 (en) * 1984-08-24 1989-01-20 Kabelmetal Electro Gmbh METHOD AND DEVICE FOR CORRUGATING METAL TUBES AND ELECTRIC POWER CABLE MANUFACTURED ACCORDING TO THE PROCESS
DE4137275A1 (en) * 1991-11-13 1993-05-19 Kabelmetal Electro Gmbh METHOD FOR THE CONTINUOUS PRODUCTION OF SCREW LINE OR RING SHAPED METAL PIPES
DE50001596D1 (en) * 2000-01-28 2003-05-08 Nexans Process for the continuous production of longitudinally welded and corrugated metal pipes and device for carrying out the process
DE10126399A1 (en) * 2001-05-31 2002-12-05 Nexans France S A Device for the continuous production of a helically corrugated metal tube
CN100389533C (en) * 2004-12-30 2008-05-21 山东大学 Permanent magnet electric motor with double rotor
JP2007333109A (en) * 2006-06-15 2007-12-27 Toyota Industries Corp Power transmission mechanism

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103056207A (en) * 2013-01-17 2013-04-24 沈阳汇博热能设备有限公司 Large-diameter multilayer metallic corrugated pipe forming die and manufacturing method thereof
CN103056207B (en) * 2013-01-17 2015-05-20 沈阳汇博热能设备有限公司 Large-diameter multilayer metallic corrugated pipe forming die and manufacturing method thereof

Also Published As

Publication number Publication date
EP2329896A1 (en) 2011-06-08
KR20110063385A (en) 2011-06-10
US20110132053A1 (en) 2011-06-09
ATE544537T1 (en) 2012-02-15
US8631672B2 (en) 2014-01-21
CN102179436A (en) 2011-09-14
CN102179436B (en) 2015-03-25

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