EP2752256B1 - Device for corrugating a pipe - Google Patents

Device for corrugating a pipe Download PDF

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Publication number
EP2752256B1
EP2752256B1 EP13305005.4A EP13305005A EP2752256B1 EP 2752256 B1 EP2752256 B1 EP 2752256B1 EP 13305005 A EP13305005 A EP 13305005A EP 2752256 B1 EP2752256 B1 EP 2752256B1
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EP
European Patent Office
Prior art keywords
pipe
tube
corrugation
shaft
corrugated
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP13305005.4A
Other languages
German (de)
French (fr)
Other versions
EP2752256A1 (en
Inventor
Nico Lange
Christian Reiter
Holger Schulz
Christian Dr. Frohne
Michael Meyer
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Nexans SA
Original Assignee
Nexans SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nexans SA filed Critical Nexans SA
Priority to EP13305005.4A priority Critical patent/EP2752256B1/en
Priority to RU2013158762/02A priority patent/RU2013158762A/en
Priority to KR1020140001393A priority patent/KR20140090101A/en
Priority to US14/147,853 priority patent/US20140305178A1/en
Priority to CN201410085385.6A priority patent/CN103909127A/en
Publication of EP2752256A1 publication Critical patent/EP2752256A1/en
Application granted granted Critical
Publication of EP2752256B1 publication Critical patent/EP2752256B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B21C37/12—Making tubes or metal hoses with helically arranged seams
    • B21C37/124—Making tubes or metal hoses with helically arranged seams the tubes having a special shape, e.g. with corrugated wall, flexible tubes
    • 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
    • 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
    • B21D15/06—Corrugating tubes transversely, e.g. helically annularly

Definitions

  • the invention relates to a device for impressing a corrugation in a smooth existing pipe made of metal according to the preamble of patent claim 1.
  • Such a device is for example from the JP S62 114 731 A out.
  • Such a device is used for producing well bendable pipes made of metal, which consist for example of steel, copper or aluminum.
  • Such pipes can be used for example in the construction of electrical or optical cables or as electrical conductors of high-frequency cables or for the transport of flowable media.
  • the corrugation can be helical or annular. The degree of bendability depends essentially on the depth of the corrugation, d. H. from the radial difference between the wave crests and the troughs.
  • a tube is formed from a longitudinally-starting metal strip which is welded to a longitudinal slot.
  • the smooth tube thus obtained is then corrugated in a shaft means transverse to its longitudinal direction.
  • a Weller disk shaft means designated as a shaft bush guide bushing is mounted, whose inner diameter is almost equal to the outer diameter of the smooth tube.
  • the corrugated tube emerging from the shaft means is moved by an elongate hollow shaft connected to the shaft means and connected to an electric motor.
  • the hollow shaft surrounds the corrugated tube at a distance.
  • the US 3,387,477 A describes a device for corrugating a pipe, which has three rollers offset by 120 ° from each other with threads, which are mounted on their surfaces.
  • the tube to be corrugated is guided between the three rollers, which are each rotated about their axis. Through the threads a corrugation is forced into the tube.
  • a sleeve surrounding the corrugated tube has three circumferentially offset recesses through which the rollers protrude. It should prevent bulging of the tube and collapse of the same.
  • a device for corrugating the sheath of an electric cable has a block having attached to it a metal ring rotatable about the axis of the device through which a corrugation is forced in the axially moving sheath during operation of the device.
  • a arranged in the direction of movement of the jacket in front of the metal ring and mounted in the direction of movement behind the same socket are connected via ball bearings with a holder to which the metal ring is attached.
  • JP S62 114 731 A a device for impressing a corrugation is described in an initially smooth pipe, in which a guide bushing for the still smooth pipe and behind the shaft means a support bushing for the corrugated pipe are mounted in front of a shaft device equipped with a corrugated head.
  • the support sleeve is firmly connected to the shaft head of the device with the interposition of mechanically strong components.
  • the invention has for its object to make the above-described device so that the dimensions of the corrugated tube can be maintained especially with a relatively deep corrugation with increased dimensional accuracy or roundness.
  • the arranged behind the shaft means support bush which can be kept axially short, provides for the pipe already during the Wellvorgangs, in which the same is significantly burdened in the radial direction, a kind of fixed point.
  • the support sleeve ensures that the tube already at the waves, but especially after leaving the shaft means in the radial direction can not get out of its desired central position.
  • the shaft leaving the device and moved in the withdrawal direction tube has characterized over its entire length a uniform or constant curl and equally uniform or consistent dimensions. Because of the very precise guidance of the tube through the support sleeve during and after the waves, thin-walled tubes can be corrugated with particular advantage and it is also possible to produce a deeper corrugation, which is of importance for highly flexible tubes.
  • the tightly fitting to the corrugated tube support bush has the further advantage that the mounted in front of the shaft guide bushing does not have to be tight against the smooth tube, but as a pure guide element quite well over the outer diameter of the smooth tube larger inside width can have.
  • a smooth tube 1 made of metal to be provided with a transverse to its longitudinal direction corrugation is irrelevant here. It may for example consist of steel or copper or aluminum.
  • the corrugation to be generated in a shaft device 2 can be annular or helical.
  • the pipe 1 is moved, for example by means of an only schematically indicated extraction device 3 in the direction of the arrow 4 and thereby in the illustrated
  • a guide bush 5 is arranged in front of the shaft device 2, through which the smooth tube 1 is passed.
  • the emerging in the direction of movement of the shaft means 2 corrugated tube 6 is guided by a support sleeve 7, which is located immediately behind the shaft means 2.
  • the corrugated tube 6 can be wound on a spool 8.
  • the Wellerlism 10 is corresponding Fig. 2 arranged eccentrically to the axis A of the tube 1 and the corrugated tube 6.
  • the axes of Weller disk 10 and pipe 1 and 6 thus run at a distance parallel to each other.
  • the corrugated head 9 and the Weller disk 10 entrained by it are turned around the pipe 1 in the circumferential direction.
  • the projection 12 of the Wellertial 10 presses the corrugation in the tube 1, which is pushed simultaneously in the direction of the arrow 4 by the shaft means 2.
  • the support bushing 7 is arranged immediately adjacent to or in the withdrawal direction behind the shaft device 2, specifically centrically to the axis A of the tube 1 and 6, respectively. It is attached to the shaft head 9 in the device without attachment.
  • the support bushing 7 may for example consist of a plastic, such as polyethylene or polyamide, or of metal, for example a bronze alloy.
  • the support sleeve 7 surrounds the corrugated tube 6 as closely as possible, but without so tightly abut the same that the movement of the corrugated tube 6 is impaired in its longitudinal direction. It is for the corrugated tube 6 already during the corrugating process a kind of fixed point, because it is held during the shafting and also thereafter by the support sleeve 7 in a central position. Because of this function of the support sleeve 7, the guide bushing 5 no longer needs to be tight against the smooth tube 1. Is in Fig. 2 indicated by an air gap between the tube 1 and guide bush 5. The guide bush 5 does not rotate with the shaft device 2. It is accordingly supported via a pivot bearing 13 relative to the same.
  • the support bush 7 is advantageously made relatively short in the axial direction. It may, for example, have a width which, in the case of an annular corrugation, corresponds approximately to the distance of two successive wave crests or, in the case of a helical corrugation, to approximately twice the wave pitch.

Description

Die Erfindung bezieht sich auf eine Vorrichtung zum Einprägen einer Wellung in ein aus Metall bestehendes, glattes Rohr gemäß dem Oberbegriff des Patentanspruchs 1.The invention relates to a device for impressing a corrugation in a smooth existing pipe made of metal according to the preamble of patent claim 1.

Eine derartige Vorrichtung geht beispielsweise aus der JP S62 114 731 A hervor.Such a device is for example from the JP S62 114 731 A out.

Eine solche Vorrichtung wird zur Herstellung gut biegbarer Rohre aus Metall eingesetzt, die beispielsweise aus Stahl, Kupfer oder Aluminium bestehen. Solche Rohre können beispielsweise im Aufbau von elektrischen oder optischen Kabeln oder als elektrische Leiter von Hochfrequenz-Kabeln oder zum Transport von fließfähigen Medien eingesetzt werden. Die Wellung kann wendelförmig oder ringförmig ausgeführt sein. Das Maß der Biegbarkeit hängt wesentlich von der Tiefe der Wellung ab, d. h. von der radialen Differenz zwischen den Wellenbergen und den Wellentälern.Such a device is used for producing well bendable pipes made of metal, which consist for example of steel, copper or aluminum. Such pipes can be used for example in the construction of electrical or optical cables or as electrical conductors of high-frequency cables or for the transport of flowable media. The corrugation can be helical or annular. The degree of bendability depends essentially on the depth of the corrugation, d. H. from the radial difference between the wave crests and the troughs.

Bei der bekannten Vorrichtung nach der EP 1 084 774 B1 wird ein Rohr aus einem längseinlaufenden Metallband geformt, das an einem Längsschlitz verschweißt wird. Das dadurch erhaltene, glatte Rohr wird anschließend in einer Welleinrichtung quer zu seiner Längsrichtung gewellt. Unmittelbar vor der mit einer Wellerscheibe ausgerüsteten Welleinrichtung ist eine als Wellerbuchse bezeichnete Führungsbuchse angebracht, deren Innendurchmesser nahezu gleich dem Außendurchmesser des glatten Rohres ist. Das aus der Welleinrichtung austretende gewellte Rohr wird durch eine mit der Welleinrichtung verbundene, langgestreckte Hohlwelle bewegt, die mit einem Elektromotor verbunden ist. Die Hohlwelle umgibt das gewellte Rohr mit Abstand.In the known device according to the EP 1 084 774 B1 For example, a tube is formed from a longitudinally-starting metal strip which is welded to a longitudinal slot. The smooth tube thus obtained is then corrugated in a shaft means transverse to its longitudinal direction. Immediately before the equipped with a Weller disk shaft means designated as a shaft bush guide bushing is mounted, whose inner diameter is almost equal to the outer diameter of the smooth tube. The corrugated tube emerging from the shaft means is moved by an elongate hollow shaft connected to the shaft means and connected to an electric motor. The hollow shaft surrounds the corrugated tube at a distance.

Die US 3,387,477 A beschreibt eine Vorrichtung zum Wellen eines Rohres, welche drei jeweils um 120° gegeneinander versetzte Rollen mit Gewindegängen aufweist, die auf ihren Oberflächen angebracht sind. Beim Betrieb der Vorrichtung wird das zu wellende Rohr zwischen den drei Rollen hindurchgeführt, welche dabei jeweils um ihre Achse gedreht werden. Durch die Gewindegänge wird eine Wellung in das Rohr gedrückt. Eine das gewellte Rohr umgebende Buchse hat drei in Umfangsrichtung versetzte Ausnehmungen, durch welche die Rollen hindurchragen. Sie soll ein Ausbeulen des Rohres sowie ein Zusammenfallen desselben verhindern.The US 3,387,477 A describes a device for corrugating a pipe, which has three rollers offset by 120 ° from each other with threads, which are mounted on their surfaces. During operation of the device, the tube to be corrugated is guided between the three rollers, which are each rotated about their axis. Through the threads a corrugation is forced into the tube. A sleeve surrounding the corrugated tube has three circumferentially offset recesses through which the rollers protrude. It should prevent bulging of the tube and collapse of the same.

Aus der DE 1 086 314 geht eine Vorrichtung zum Wellen des Mantels eines elektrischen Kabels hervor, die einen Block aufweist, an dem ein um die Achse der Vorrichtung drehbarer Metallring angebracht ist, durch welchen beim Betrieb der Vorrichtung eine Wellung in den in axialer Richtung bewegten Mantel gedrückt wird. Eine in Bewegungsrichtung des Mantels vor dem Metallring angeordnete und eine in Bewegungsrichtung hinter demselben angebrachte Buchse sind über Kugellager mit einer Halterung verbunden, an welcher der Metallring angebracht ist.From the DE 1 086 314 For example, a device for corrugating the sheath of an electric cable has a block having attached to it a metal ring rotatable about the axis of the device through which a corrugation is forced in the axially moving sheath during operation of the device. A arranged in the direction of movement of the jacket in front of the metal ring and mounted in the direction of movement behind the same socket are connected via ball bearings with a holder to which the metal ring is attached.

In der eingangs erwähnten JP S62 114 731 A ist eine Vorrichtung zum Eindrücken einer Wellung in ein zunächst glattes Rohr beschrieben, bei welcher vor einer mit einem Wellerkopf ausgerüsteten Welleinrichtung eine Führungsbuchse für das noch glatte Rohr und hinter der Welleinrichtung eine Stützbuchse für das gewellte Rohr angebracht sind. Die Stützbuchse ist unter Zwischenschaltung von mechanisch festen Bauteilen fest mit dem Wellerkopf der Vorrichtung verbunden.In the aforementioned JP S62 114 731 A a device for impressing a corrugation is described in an initially smooth pipe, in which a guide bushing for the still smooth pipe and behind the shaft means a support bushing for the corrugated pipe are mounted in front of a shaft device equipped with a corrugated head. The support sleeve is firmly connected to the shaft head of the device with the interposition of mechanically strong components.

Der Erfindung liegt die Aufgabe zugrunde, die eingangs geschilderte Vorrichtung so zu gestalten, daß die Abmessungen des gewellten Rohres insbesondere auch bei einer relativ tiefen Wellung mit erhöhter Formgenauigkeit bzw. Rundheit eingehalten werden können.The invention has for its object to make the above-described device so that the dimensions of the corrugated tube can be maintained especially with a relatively deep corrugation with increased dimensional accuracy or roundness.

Diese Aufgabe wird durch eine Vorrichtung mit den Merkmalen des Patentanspruchs 1 gelöst.This object is achieved by a device having the features of patent claim 1.

Die hinter der Welleinrichtung angeordnete Stützbuchse, die axial kurz gehalten werden kann, stellt für das Rohr bereits während des Wellvorgangs, bei welchem dasselbe in radialer Richtung erheblich belastet wird, eine Art Festpunkt dar. Die Stützbuchse stellt sicher, daß das Rohr schon beim Wellen, aber insbesondere nach dem Verlassen der Welleinrichtung in radialer Richtung nicht aus seiner gewünschten zentralen Position herausgelangen kann. Das die Welleinrichtung verlassende und in Abzugsrichtung bewegte Rohr hat dadurch auf seiner ganzen Länge eine gleichmäßige bzw. gleichbleibende Wellung und ebenso gleichmäßige bzw. gleichbleibende Abmessungen. Wegen der sehr genauen Führung des Rohres durch die Stützbuchse beim und nach dem Wellen, können mit besonderem Vorteil dünnwandige Rohre gewellt werden und es ist auch möglich, eine tiefere Wellung zu erzeugen, die für hochflexible Rohre von Bedeutung ist. Die eng am gewellten Rohr anliegende Stützbuchse hat den weiteren Vorteil, daß die vor der Welleinrichtung angebrachte Führungsbuchse nicht dicht am glatten Rohr anliegen muß, sondern als reines Führungselement durchaus auch eine gegenüber dem Außendurchmesser des glatten Rohres größere lichte Weite haben kann.The arranged behind the shaft means support bush, which can be kept axially short, provides for the pipe already during the Wellvorgangs, in which the same is significantly burdened in the radial direction, a kind of fixed point. The support sleeve ensures that the tube already at the waves, but especially after leaving the shaft means in the radial direction can not get out of its desired central position. The shaft leaving the device and moved in the withdrawal direction tube has characterized over its entire length a uniform or constant curl and equally uniform or consistent dimensions. Because of the very precise guidance of the tube through the support sleeve during and after the waves, thin-walled tubes can be corrugated with particular advantage and it is also possible to produce a deeper corrugation, which is of importance for highly flexible tubes. The tightly fitting to the corrugated tube support bush has the further advantage that the mounted in front of the shaft guide bushing does not have to be tight against the smooth tube, but as a pure guide element quite well over the outer diameter of the smooth tube larger inside width can have.

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

Es zeigen:

  • Fig. 1 schematisch eine Anordnung zur Herstellung eines gewellten Rohres.
  • Fig. 2 eine in der Anordnung nach Fig. 1 einsetzbare Vorrichtung nach der Erfindung in vergrößerter Darstellung.
Show it:
  • Fig. 1 schematically an arrangement for producing a corrugated pipe.
  • Fig. 2 one in the arrangement Fig. 1 usable device according to the invention in an enlarged view.

Mit einer Anordnung nach Fig. 1 soll ein glattes Rohr 1 aus Metall mit einer quer zu seiner Längsrichtung verlaufenden Wellung versehen werden. Auf welche Art und Weise das Rohr 1 hergestellt wurde, ist hier unerheblich. Es kann beispielsweise aus Stahl oder Kupfer oder Aluminium bestehen. Die in einer Welleinrichtung 2 zu erzeugende Wellung kann ringförmig oder wendelförmig ausgeführt sein.With an arrangement after Fig. 1 If a smooth tube 1 made of metal to be provided with a transverse to its longitudinal direction corrugation. The way in which the tube 1 was made, is irrelevant here. It may for example consist of steel or copper or aluminum. The corrugation to be generated in a shaft device 2 can be annular or helical.

Das Rohr 1 wird beispielsweise mittels einer nur schematisch angedeuteten Abzugseinrichtung 3 in Richtung des Pfeiles 4 bewegt und dadurch im dargestelltenThe pipe 1 is moved, for example by means of an only schematically indicated extraction device 3 in the direction of the arrow 4 and thereby in the illustrated

Ausführungsbeispiel durch die Welleinrichtung 2 geschoben. In Bewegungsrichtung gesehen, ist vor der Welleinrichtung 2 eine Führungsbuchse 5 angeordnet, durch welche das glatte Rohr 1 hindurchgeführt ist. Das in Bewegungsrichtung aus der Welleinrichtung 2 austretende, gewellte Rohr 6 ist durch eine Stützbuchse 7 geführt, die unmittelbar hinter der Welleinrichtung 2 angeordnet ist. Das gewellte Rohr 6 kann auf eine Spule 8 aufgewickelt werden.Embodiment pushed by the shaft device 2. Seen in the direction of movement, a guide bush 5 is arranged in front of the shaft device 2, through which the smooth tube 1 is passed. The emerging in the direction of movement of the shaft means 2, corrugated tube 6 is guided by a support sleeve 7, which is located immediately behind the shaft means 2. The corrugated tube 6 can be wound on a spool 8.

Die Vorrichtung nach der Erfindung wird im Folgenden anhand von Fig. 2 näher erläutert:

  • Die in der Vorrichtung eingesetzte Welleinrichtung 2 ist grundsätzlich bekannt. Es werden daher nur die für das Verständnis der Erfindung erforderlichen Teile derselben erläutert. Zu der Welleinrichtung 2 gehört ein Wellerkopf 9, der als Ringscheibe mit einer zentralen Öffnung ausgeführt ist: In der zentralen Öffnung ist eine Wellerscheibe 10 drehbar gelagert, beispielsweise mittels eines Kugellagers 11. Die Wellerscheibe 10 hat einen radial nach innen weisenden Vorsprung 12, durch welchen beim Betrieb der Vorrichtung die Wellung in das glatte Rohr 1 gedrückt wird.
The device according to the invention is described below with reference to Fig. 2 explained in more detail:
  • The shaft device 2 used in the device is known in principle. Therefore, only the parts necessary for understanding the invention will be explained. To the shaft means 2 includes a corrugated head 9, which is designed as an annular disc with a central opening: In the central opening a Wellerscheibe 10 is rotatably mounted, for example by means of a ball bearing 11. The Wellerscheibe 10 has a radially inwardly facing projection 12 through which during operation of the device, the corrugation is pressed into the smooth tube 1.

Die Wellerscheibe 10 ist entsprechend Fig. 2 exzentrisch zur Achse A des Rohres 1 bzw. des gewellten Rohres 6 angeordnet. Die Achsen von Wellerscheibe 10 und Rohr 1 bzw. 6 verlaufen also mit Abstand parallel zueinander. Beim Betrieb der Vorrichtung werden der Wellerkopf 9 und die von demselben mitgenommene Wellerscheibe 10 in Umfangsrichtung um das Rohr 1 herumgedreht. Dabei drückt der Vorsprung 12 der Wellerscheibe 10 die Wellung in das Rohr 1, das gleichzeitig in Richtung des Pfeiles 4 durch die Welleinrichtung 2 geschoben wird.The Wellerscheibe 10 is corresponding Fig. 2 arranged eccentrically to the axis A of the tube 1 and the corrugated tube 6. The axes of Weller disk 10 and pipe 1 and 6 thus run at a distance parallel to each other. During operation of the device, the corrugated head 9 and the Weller disk 10 entrained by it are turned around the pipe 1 in the circumferential direction. In this case, the projection 12 of the Wellerscheibe 10 presses the corrugation in the tube 1, which is pushed simultaneously in the direction of the arrow 4 by the shaft means 2.

Die Stützbuchse 7 ist unmittelbar neben bzw. in Abzugsrichtung hinter der Welleinrichtung 2 angeordnet, und zwar zentrisch zur Achse A des Rohres 1 bzw. 6. Sie ist ohne Befestigung am Wellerkopf 9 in der Vorrichtung angebracht. Die Stützbuchse 7 kann beispielsweise aus einem Kunststoff, wie Polyethylen oder Polyamid, oder auch aus Metall, beispielsweise einer Bronzelegierung, bestehen.The support bushing 7 is arranged immediately adjacent to or in the withdrawal direction behind the shaft device 2, specifically centrically to the axis A of the tube 1 and 6, respectively. It is attached to the shaft head 9 in the device without attachment. The support bushing 7 may for example consist of a plastic, such as polyethylene or polyamide, or of metal, for example a bronze alloy.

Die Stützbuchse 7 umgibt das gewellte Rohr 6 möglichst eng, ohne allerdings so eng an demselben anzuliegen, daß die Bewegung des gewellten Rohres 6 in seiner Längsrichtung beeinträchtigt wird. Sie ist für das gewellte Rohr 6 bereits während des Wellvorgangs eine Art Festpunkt, weil dasselbe während des Wellens und auch danach durch die Stützbuchse 7 in einer zentrischen Lage gehalten wird. Wegen dieser Funktion der Stützbuchse 7 braucht die Führungsbuchse 5 nicht mehr dicht am glatten Rohr 1 anzuliegen. Das ist in Fig. 2 durch einen Luftspalt zwischen Rohr 1 und Führungsbuchse 5 angedeutet. Die Führungsbuchse 5 dreht nicht mit der Welleinrichtung 2 mit. Sie ist dementsprechend über ein Drehlager 13 gegenüber derselben abgestützt.The support sleeve 7 surrounds the corrugated tube 6 as closely as possible, but without so tightly abut the same that the movement of the corrugated tube 6 is impaired in its longitudinal direction. It is for the corrugated tube 6 already during the corrugating process a kind of fixed point, because it is held during the shafting and also thereafter by the support sleeve 7 in a central position. Because of this function of the support sleeve 7, the guide bushing 5 no longer needs to be tight against the smooth tube 1. Is in Fig. 2 indicated by an air gap between the tube 1 and guide bush 5. The guide bush 5 does not rotate with the shaft device 2. It is accordingly supported via a pivot bearing 13 relative to the same.

Die Stützbuchse 7 ist mit Vorteil in axialer Richtung relativ kurz ausgeführt. Sie kann beispielsweise eine Breite haben, die bei einer ringförmigen Wellung etwa dem Abstand von zwei hintereinander folgenden Wellenbergen oder bei einer wendelförmigen Wellung etwa dem Doppelten der Wellsteigung entspricht.The support bush 7 is advantageously made relatively short in the axial direction. It may, for example, have a width which, in the case of an annular corrugation, corresponds approximately to the distance of two successive wave crests or, in the case of a helical corrugation, to approximately twice the wave pitch.

Claims (1)

  1. Device for imparting a corrugation into a smooth metal pipe which extends transversely of the longitudinal direction of the pipe with wave peaks and wave valleys extending in a circumferential direction of the pipe, which comprises a corrugating unit (2) with a projection (9) which has a protrusion rotating in the circumferential direction in the position of operation, wherein in front of the corrugating unit (2) a guide sleeve (5) is mounted for guiding the smooth metal pipe which is moved in the longitudinal direction of the pipe and wherein a support sleeve (7) is arranged immediately behind the corrugating unit (2) which tightly surrounds the corrugated pipe (6) leaving the corrugating unit (2) in the pulling off direction without impairing the movement of the pipe in its longitudinal direction, characterized in that the support sleeve (7) is mounted without being attached to said corrugating unit (2) of the device.
EP13305005.4A 2013-01-07 2013-01-07 Device for corrugating a pipe Not-in-force EP2752256B1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP13305005.4A EP2752256B1 (en) 2013-01-07 2013-01-07 Device for corrugating a pipe
RU2013158762/02A RU2013158762A (en) 2013-01-07 2013-12-27 DEVICE FOR PIPING
KR1020140001393A KR20140090101A (en) 2013-01-07 2014-01-06 Apparatus for corrugating a pipe
US14/147,853 US20140305178A1 (en) 2013-01-07 2014-01-06 Device for undulating a pipe
CN201410085385.6A CN103909127A (en) 2013-01-07 2014-01-07 Device for corrugating a pipe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP13305005.4A EP2752256B1 (en) 2013-01-07 2013-01-07 Device for corrugating a pipe

Publications (2)

Publication Number Publication Date
EP2752256A1 EP2752256A1 (en) 2014-07-09
EP2752256B1 true EP2752256B1 (en) 2016-06-15

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EP13305005.4A Not-in-force EP2752256B1 (en) 2013-01-07 2013-01-07 Device for corrugating a pipe

Country Status (5)

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US (1) US20140305178A1 (en)
EP (1) EP2752256B1 (en)
KR (1) KR20140090101A (en)
CN (1) CN103909127A (en)
RU (1) RU2013158762A (en)

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CN106122659B (en) * 2016-08-19 2017-12-15 李中来 The process equipment and processing method of circumferential bellows
CN106328314B (en) * 2016-09-13 2017-07-14 芜湖市旭辉电工新材料有限责任公司 A kind of accompanying-heat cable cross-linked polyolefin insulating barrier extrudes technique
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CN103909127A (en) 2014-07-09
EP2752256A1 (en) 2014-07-09
KR20140090101A (en) 2014-07-16
RU2013158762A (en) 2015-07-10

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