EP1084774B1 - Method for the continuous production of a longitudinally seam welded and corrugated metal tube and device for carrying out this method - Google Patents

Method for the continuous production of a longitudinally seam welded and corrugated metal tube and device for carrying out this method Download PDF

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Publication number
EP1084774B1
EP1084774B1 EP00400265A EP00400265A EP1084774B1 EP 1084774 B1 EP1084774 B1 EP 1084774B1 EP 00400265 A EP00400265 A EP 00400265A EP 00400265 A EP00400265 A EP 00400265A EP 1084774 B1 EP1084774 B1 EP 1084774B1
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EP
European Patent Office
Prior art keywords
hollow shaft
shaft motor
rotor
measured
tube
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.)
Expired - Lifetime
Application number
EP00400265A
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German (de)
French (fr)
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EP1084774A1 (en
Inventor
Christian Dr.-Ing. Frohne
Ernst Dipl.-Ing. Hoffmann
Wolfram Dipl.-Ing. Klebl
Dieter Dipl.-Ing. Müller
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Nexans SA
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Nexans SA
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Filing date
Publication date
Priority to DE50001596T priority Critical patent/DE50001596D1/en
Application filed by Nexans SA filed Critical Nexans SA
Priority to DK00400265T priority patent/DK1084774T3/en
Priority to EP00400265A priority patent/EP1084774B1/en
Priority to PT00400265T priority patent/PT1084774E/en
Priority to ES00400265T priority patent/ES2195842T3/en
Priority to AT00400265T priority patent/ATE235974T1/en
Priority to CNB001380087A priority patent/CN1214874C/en
Priority to US09/759,239 priority patent/US6405919B2/en
Priority to CA002332191A priority patent/CA2332191C/en
Priority to JP2001018319A priority patent/JP2001232422A/en
Priority to KR1020010003686A priority patent/KR100668584B1/en
Publication of EP1084774A1 publication Critical patent/EP1084774A1/en
Application granted granted Critical
Publication of EP1084774B1 publication Critical patent/EP1084774B1/en
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Classifications

    • 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
    • B21D51/00—Making hollow objects
    • B21D51/02—Making hollow objects characterised by the structure of the objects
    • B21D51/12—Making hollow objects characterised by the structure of the objects objects with corrugated walls
    • 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
    • B21C37/15—Making tubes of special shape; Making tube fittings
    • B21C37/20—Making helical or similar guides in or on tubes without removing material, e.g. by drawing same over mandrels, by pushing same through dies ; Making tubes with angled walls, ribbed tubes and tubes with decorated walls
    • B21C37/207—Making helical or similar guides in or on tubes without removing material, e.g. by drawing same over mandrels, by pushing same through dies ; Making tubes with angled walls, ribbed tubes and tubes with decorated walls with helical guides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/08—Making tubes with welded or soldered seams
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49764—Method of mechanical manufacture with testing or indicating
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/51—Plural diverse manufacturing apparatus including means for metal shaping or assembling
    • Y10T29/5185—Tube making

Definitions

  • the invention relates to a method and a device according to the preamble of Claims 1 and 7 (see e.g. DE-A-4 137 275).
  • DE-A-16 52 990 describes a device for continuous wave-thin-walled, in particular longitudinally welded smooth tubes are known, in which one of one Retracted spool metal strip formed into a slotted tube on his Longitudinal edges welded and fed to a corrugated device in which the welded smooth tube is provided with a helical corrugation.
  • the Corrugated device consists of a housing in which coaxial to the continuous Smooth tube a shaft head is rotatably arranged. In the well head A Weller roller ring is eccentric to the smooth tube and inclined under the screw pitch freely rotatably mounted on the surface of the Rolls smooth tube and thereby forms the wall of the smooth tube.
  • the rotary drive of the shaft head is via a gear with a trigger device coupled with which the smooth pipe is transported.
  • the well head is on a hollow shaft attached, which carries a gear on its outer surface, which with a pinion a gear transmission meshes.
  • the gear transmission is infinitely variable Gearbox coupled with a main drive motor, which at the same time the Trigger device drives.
  • corrugated device is described in DE-A-20 49 235.
  • a provided rotatably drivable well head which, as described above, via a Hollow shaft, gear transmission, continuously variable transmission and an electric motor is drivable.
  • a corrugated tool is mounted in the well head, which has a Deformation rib which produces the corrugation.
  • the deformation rib has one helical course, their clear width is smaller than the outer diameter of the smooth tube.
  • the deformation rib practically screws onto that Smooth pipe and forms a helical corrugation in the pipe wall.
  • This Welltechnik is mainly used for the production of high-frequency cables.
  • the present invention is therefore based on the object, the known Corrugation process and corrugation devices to improve that the rotating masses reduced and thereby the rotational speed of the Wellerkopfes increased and thus a higher production speed can be achieved.
  • the main advantage of the invention is the fact that by using a Hollow shaft motor the number of rotating machine elements in the shaft device a minimum can be reduced.
  • the moment of inertia of the rotating Elements is based on the moment of inertia of the hollow shaft or the rotor of the Hollow shaft motor reduced. This results in an increase in the control speed of the drive system, which leads to an improvement in the quality of the corrugated pipes.
  • the corrugated tubes for high-frequency transmission z. B. as a waveguide or used as the inner and / or outer conductor of a coaxial high-frequency cable uniform shape of the curl leads to a reduction in the height of Reflection peaks and a reduction in the reflection level.
  • FIGS. 1 to 4 Exemplary embodiments explained in more detail.
  • Fig. 1 shows a view of a production line 1 for z. B. coaxial radio frequency cables.
  • the spacers with unspecified spacers provided inner conductor 5, z. B. a corrugated copper tube, deducted.
  • From one Supply spool 7 is a metal strip 11, z. B. copper, subtracted by a Cleaning system 9 transported and fed to a molding device 13, in which the Copper tape 11 to a tube concentric with the inner conductor 5 with a longitudinal slot is formed.
  • a welding device 15 preferably a TIG Welding device, the longitudinal slot is welded.
  • a trigger device 17 Seen in the direction of flow behind the welding device 15, a trigger device 17 is arranged, which welded tube 23 and thus the inner conductor 5 and the copper strip 11 transported.
  • the trigger device 17 consists of an endless chain 19, on which in certain Distances to each other collets 21 are mounted.
  • sprockets 33 and 35 are provided around which the endless chain 19 is led around.
  • the sprocket 33 is by means of an electric motor, not shown driven and drives the chain 19 with the collets 21 mounted thereon, whereas the chain wheel 35 serves as a chain tensioning wheel.
  • a corrugated device 25 is arranged, which in the Wall of the welded tube 23 an annular or helical corrugation einformt.
  • the high-frequency cable thus produced is regulated via a dancer 27 a cable drum 29 wound up.
  • the tube forms in the finished high-frequency cable 23, after it has been corrugated, the outer conductor.
  • the trigger device 17 is the subject of DBP 11 64 355, to which reference is taken.
  • the corrugated device is shown in a fixed housing 36 .
  • the rotor 38 of the electric motor is a hollow shaft trained (hollow shaft motor).
  • the rotor 38 is fixed to a hollow shaft 39 z. B. pressed or shrunk.
  • the hollow shaft 39 is via roller bearings or bearings 40 and 41 with a longitudinally displaceable inner ring rotatable in the fixed housing 36 stored.
  • the shaft head 42 is flanged, which thus over the hollow shaft 39 is driven directly by the hollow shaft motor.
  • a corrugated washer 43 is attached, which generates the corrugation in the smooth tube 45.
  • the washer can be an annular, i.e. H. have self-contained deformation rib. In this case it is Inner diameter of the deformation rib larger than the outer diameter of the Smooth tube 45, the washer 43 is freely rotatable and to the longitudinal axis of the smooth tube inclined and eccentric to the pipe axis. The washer 43 rolls on from the surface of the smooth tube 45 when the well head 42 rotates and generates due to the eccentric bearing, a helical corrugation (see corrugated tube 46).
  • a corrugated washer 43 used with a helical deformation rib.
  • the speed of the hollow shaft motor is coupled to the speed of the electric motor for the trigger device via a fixed ratio, depending on the dimensions of the corrugated metal tube to be produced.
  • the pitch is the distance between two wave crests.
  • the speed of the hollow shaft motor is measured by means of a resolver or incremental encoder 47.
  • This change in the specified data is determined by a sensor 48 measured.
  • the sensor 48 can either be a linear potentiometer or a pressure cell or known bending elements can be equipped with strain gauges.
  • the measured value is entered into the control loop and the speed of the hollow shaft motor either increased (when pushing) or decreased (when pulling).
  • the hollow shaft motor is on one longitudinally displaceable slide 49, the displacement of which by Linear potentiometer 48 or its on a pressure cell or bending element acting axial force is measured.
  • control scheme for the corrugated process according to the invention is intended to be illustrated in FIG be made clear.
  • the production speed is specified from the console.
  • an empirically determined ratio i soll between the speed of the take-off n A and the speed n Weller is specified.
  • the value determined by the measuring device 48 is correspondingly entered into the control loop and a corrected ratio i corr is added to the predetermined value i soll .

Abstract

The manufacturing method has a metal band fed from a supply reel formed into a slit metal sleeve, which is welded together longitudinally and provided with corrugations via a corrugation disc (43) in a rotary corrugation head (42), driven directly by a hollow shaft electric motor (37,38). The revs of the latter motor are directly related to the revs of the electric motor for the pulling device acting on the smooth sleeve. An Independent claim for a device for continuous manufacture of a corrugated metal hose is also included.

Description

Die Erfindung betrifft ein Verfahren sowie eine Vorrichtung nach dem Oberbegriff der Ansprüche 1 und 7 (siehe z.B. DE-A-4 137 275).The invention relates to a method and a device according to the preamble of Claims 1 and 7 (see e.g. DE-A-4 137 275).

Aus der DE-A-16 52 990 ist eine Einrichtung zum kontinuierlichen Wellen dünnwandiger, insbesondere längsnahtgeschweißter Glattrohre bekannt, bei welchem ein von einer Vorratsspule abgezogenes Metallband zu einem Schlitzrohr geformt, an seinen Längskanten verschweißt und einer Wellvorrichtung zugeführt wird, in welcher das geschweißte Glattrohr mit einer schraubenlinienförmigen Wellung versehen wird. Die Wellvorrichtung besteht aus einem Gehäuse, in welchem koaxial zu dem durchlaufenden Glattrohr ein Wellerkopf drehantreibbar angeordnet ist. In dem Wellerkopf ist exzentrisch zum Glattrohr und unter der Schraubensteigung geneigt ein Wellerwälzring frei drehbar gelagert, der sich bei Drehung des Wellerkopfes auf der Oberfläche des Glattrohres abwälzt und dabei die Wandung des Glattrohres einformt.DE-A-16 52 990 describes a device for continuous wave-thin-walled, in particular longitudinally welded smooth tubes are known, in which one of one Retracted spool metal strip formed into a slotted tube on his Longitudinal edges welded and fed to a corrugated device in which the welded smooth tube is provided with a helical corrugation. The Corrugated device consists of a housing in which coaxial to the continuous Smooth tube a shaft head is rotatably arranged. In the well head A Weller roller ring is eccentric to the smooth tube and inclined under the screw pitch freely rotatably mounted on the surface of the Rolls smooth tube and thereby forms the wall of the smooth tube.

Der Drehantrieb des Wellerkopfes ist über ein Getriebe mit einer Abzugsvorrichtung gekuppelt, mit der das Glattrohr transportiert wird. Der Wellerkopf ist an einer Hohlwelle befestigt, die an ihrer äußeren Oberfläche ein Zahnrad trägt, welches mit einem Ritzel eines Zahnradgetriebes kämmt. Das Zahnradgetriebe ist über ein stufenlos regelbares Getriebe mit einem Hauptantriebsmotor gekuppelt, der gleichzeitig die Abzugsvorrichtung antreibt.The rotary drive of the shaft head is via a gear with a trigger device coupled with which the smooth pipe is transported. The well head is on a hollow shaft attached, which carries a gear on its outer surface, which with a pinion a gear transmission meshes. The gear transmission is infinitely variable Gearbox coupled with a main drive motor, which at the same time the Trigger device drives.

Mit einer solchen Vorrichtung ist es möglich, in kontinuierlicher Arbeitsweise schraubenlinien- oder ringförmig gewellte Metallrohre herzustellen.With such a device it is possible to work continuously to produce helically or annularly corrugated metal pipes.

Wegen der großen umlaufenden Massen des Wellerkopfes und der Hohlwelle ist die Drehgeschwindigkeit des Wellerkopfes und damit die Fertigungsgeschwindigkeit für das gewellte Metallrohr naturgemäß relativ niedrig.Because of the large circumferential masses of the shaft head and the hollow shaft, the Rotation speed of the well head and thus the production speed for the corrugated metal pipe naturally relatively low.

Eine andere Wellvorrichtung ist in der DE-A-20 49 235 beschrieben. Auch hier ist ein drehantreibbarer Wellerkopf vorgesehen, der wie oben beschrieben, über eine Hohlwelle, Zahnradgetriebe, stufenlos regelbares Getriebe und einen Elektromotor antreibbar ist. In dem Wellerkopf ist ein Wellwerkzeug gelagert, welches eine Verformungsrippe aufweist, welche die Wellung erzeugt. Die Verformungsrippe hat einen schraubenlinienförmigen Verlauf, ihre lichte Weite ist kleiner als der Außendurchmesser des Glattrohres. Beim Wellvorgang schraubt sich die Verformungsrippe quasi auf das Glattrohr auf und formt eine schraubenlinienförmige Wellung in die Rohrwandung. Diese Welltechnik wird vornehmlich für die Herstellung von Hochfrequenzkabeln eingesetzt.Another corrugated device is described in DE-A-20 49 235. Here too is a provided rotatably drivable well head, which, as described above, via a Hollow shaft, gear transmission, continuously variable transmission and an electric motor is drivable. A corrugated tool is mounted in the well head, which has a Deformation rib which produces the corrugation. The deformation rib has one helical course, their clear width is smaller than the outer diameter of the smooth tube. During the corrugation process, the deformation rib practically screws onto that Smooth pipe and forms a helical corrugation in the pipe wall. This Welltechnik is mainly used for the production of high-frequency cables.

Da bei dieser Wellvorrichtung der gleiche Antrieb verwendet wird, weist auch diese Wellvorrichtung die geschilderten Nachteile auf.Since the same drive is used in this corrugated device, this also has Well device the disadvantages described.

Der vorliegenden Erfindung liegt von daher die Aufgabe zugrunde, die bekannten Wellverfahren sowie Wellvorrichtungen dahingehend zu verbessern, daß die umlaufenden Massen verringert und dadurch die Rotationsgeschwindigkeit des Wellerkopfes erhöht und somit eine höhere Fertigungsgeschwindigkeit erzielbar ist.The present invention is therefore based on the object, the known Corrugation process and corrugation devices to improve that the rotating masses reduced and thereby the rotational speed of the Wellerkopfes increased and thus a higher production speed can be achieved.

Diese Aufgabe wird durch die im Kennzeichen der Ansprüche 1 und 7 erfaßten Merkmale gelöst.This object is achieved by the characterizing part of claims 1 and 7 Features resolved.

Der wesentliche Vorteil der Erfindung ist darin zu sehen, daß durch den Einsatz eines Hohlwellenmotors die Anzahl rotierender Maschinenelemente in der Wellvorrichtung auf ein Minimum zurückgeführt werden kann. Das Massenträgheitsmoment der rotierenden Elemente wird auf das Massenträgheitsmoment der Hohlwelle bzw. des Rotors des Hohlwellenmotors reduziert. Daraus resultiert eine Erhöhung der Regelgeschwindigkeit des Antriebssystems, was zu einer Verbesserung der Qualität der Wellrohre führt. Insbesondere, wenn die Wellrohre für die Hochfrequenzübertragung z. B. als Hohlleiter oder als Innen- und/oder Außenleiter eines koaxialen Hochfrequenzkabels verwendet werden, führt eine gleichmäßige Form der Wellung zu einer Verringerung der Höhe von Reflexionsspitzen sowie zu einer Reduzierung des Reflexionsniveaus.The main advantage of the invention is the fact that by using a Hollow shaft motor the number of rotating machine elements in the shaft device a minimum can be reduced. The moment of inertia of the rotating Elements is based on the moment of inertia of the hollow shaft or the rotor of the Hollow shaft motor reduced. This results in an increase in the control speed of the drive system, which leads to an improvement in the quality of the corrugated pipes. In particular, if the corrugated tubes for high-frequency transmission z. B. as a waveguide or used as the inner and / or outer conductor of a coaxial high-frequency cable uniform shape of the curl leads to a reduction in the height of Reflection peaks and a reduction in the reflection level.

Die Erfindung ist anhand der in den Figuren 1 bis 4 schematisch dargestellten Ausführungsbeispiele näher erläutert.The invention is illustrated schematically in FIGS. 1 to 4 Exemplary embodiments explained in more detail.

Fig. 1 zeigt eine Ansicht einer Fertigungsstraße 1 für z. B. koaxiale Hochfrequenzkabel. Von einer Vorratstrommel 3 wird der mit nicht näher bezeichneten Abstandshalterungen versehene Innenleiter 5, z. B. ein gewelltes Kupferrohr, abgezogen. Von einer Vorratsspule 7 wird ein Metallband 11, z. B. aus Kupfer, abgezogen, durch eine Reinigungsanlage 9 transportiert und einer Formvorrichtung 13 zugeführt, in welcher das Kupferband 11 zu einem zu dem Innenleiter 5 konzentrischen Rohr mit Längsschlitz geformt wird. Mittels einer Schweißvorrichtung 15, vorzugsweise einer WIG Schweißeinrichtung, wird der Längsschlitz verschweißt. In Durchlaufrichtung gesehen hinter der Schweißeinrichtung 15 ist eine Abzugsvorrichtung 17 angeordnet, die das verschweißte Rohr 23 und damit den Innenleiter 5 und das Kupferband 11 transportiert. Die Abzugsvorrichtung 17 besteht aus einer endlosen Kette 19, an welcher in bestimmten Abständen zueinander Spannzangen 21 montiert sind. Innerhalb des Abzugsgehäuses 31 sind Kettenräder 33 und 35 vorgesehen, um welche die endlose Kette 19 herumgeführt wird. Das Kettenrad 33 ist mittels eines nicht dargestellten Elektromotors angetrieben und treibt die Kette 19 mit den darauf montierten Spannzangen 21 an, wogegen das Kettenrad 35 als Kettenspannrad dient.Fig. 1 shows a view of a production line 1 for z. B. coaxial radio frequency cables. From a storage drum 3, the spacers with unspecified spacers provided inner conductor 5, z. B. a corrugated copper tube, deducted. From one Supply spool 7 is a metal strip 11, z. B. copper, subtracted by a Cleaning system 9 transported and fed to a molding device 13, in which the Copper tape 11 to a tube concentric with the inner conductor 5 with a longitudinal slot is formed. By means of a welding device 15, preferably a TIG Welding device, the longitudinal slot is welded. Seen in the direction of flow behind the welding device 15, a trigger device 17 is arranged, which welded tube 23 and thus the inner conductor 5 and the copper strip 11 transported. The trigger device 17 consists of an endless chain 19, on which in certain Distances to each other collets 21 are mounted. Inside the fume cupboard 31 sprockets 33 and 35 are provided around which the endless chain 19 is led around. The sprocket 33 is by means of an electric motor, not shown driven and drives the chain 19 with the collets 21 mounted thereon, whereas the chain wheel 35 serves as a chain tensioning wheel.

Hinter der Abzugsvorrichtung 17 ist eine Wellvorrichtung 25 angeordnet, welche in die Wandung des geschweißten Rohres 23 eine ring- oder schraubenförmige Wellung einformt. Über einen Tänzer 27 geregelt wird das so gefertigte Hochfrequenzkabel auf eine Kabeltrommel 29 aufgewickelt. In dem fertigen Hochfrequenzkabel bildet das Rohr 23, nachdem es mit einer Wellung versehen wurde, den Außenleiter.Behind the trigger device 17, a corrugated device 25 is arranged, which in the Wall of the welded tube 23 an annular or helical corrugation einformt. The high-frequency cable thus produced is regulated via a dancer 27 a cable drum 29 wound up. The tube forms in the finished high-frequency cable 23, after it has been corrugated, the outer conductor.

Die Abzugsvorrichtung 17 ist Gegenstand des DBP 11 64 355, auf welches Bezug genommen wird.The trigger device 17 is the subject of DBP 11 64 355, to which reference is taken.

In Figur 2 ist die Wellvorrichtung dargestellt. In einem feststehenden Gehäuse 36 ist der Stator 37 eines Elektromotors fixiert. Der Rotor 38 des Elektromotors ist als Hohlwelle ausgebildet (Hohlwellenmotor). Der Rotor 38 ist fest mit einer Hohlwelle 39 verbunden z. B. aufgepreßt oder aufgeschrumpft. Die Hohlwelle 39 ist über Wälzlager bzw. Lager 40 und 41 mit längsverschieblichem Innenring drehbar in dem feststehenden Gehäuse 36 gelagert.In Figure 2, the corrugated device is shown. In a fixed housing 36 is the Stator 37 of an electric motor fixed. The rotor 38 of the electric motor is a hollow shaft trained (hollow shaft motor). The rotor 38 is fixed to a hollow shaft 39 z. B. pressed or shrunk. The hollow shaft 39 is via roller bearings or bearings 40 and 41 with a longitudinally displaceable inner ring rotatable in the fixed housing 36 stored.

An das eine Ende der Hohlwelle 39 ist der Wellerkopf 42 angeflanscht, der somit über die Hohlwelle 39 direkt von dem Hohlwellenmotor angetrieben wird. In dem Wellerkopf 42 ist eine Wellerscheibe 43 befestigt, welche die Wellung in dem Glattrohr 45 erzeugt. Zur Abstützung des Glattrohres 45 ist unmittelbar vor der Wellerscheibe 43 eine Wellerbuchse 44 angeordnet, deren Innendurchmesser nahezu gleich dem Außendurchmesser des Glattrohres 45 ist. Die Wellerscheibe kann eine ringförmige, d. h. in sich geschlossene Verformungsrippe aufweisen. In diesem Fall ist der Innendurchmesser der Verformungsrippe größer als der Außendurchmesser des Glattrohres 45, die Wellerscheibe 43 ist frei drehbar und zur Längsachse des Glattrohres geneigt sowie exzentrisch zur Rohrachse angeordnet. Die Wellerscheibe 43 wälzt sich auf der Oberfläche des Glattrohres 45 bei Rotation des Wellerkopfes 42 ab und erzeugt aufgrund der exzentrischen Lagerung eine schraubenlinienförmig verlaufende Wellung (siehe Wellrohr 46).At one end of the hollow shaft 39, the shaft head 42 is flanged, which thus over the hollow shaft 39 is driven directly by the hollow shaft motor. In the wellhead 42 a corrugated washer 43 is attached, which generates the corrugation in the smooth tube 45. To support the smooth tube 45 is one immediately in front of the washer 43 Weller bushing 44 arranged, the inner diameter of which is almost equal to that Outside diameter of the smooth tube 45 is. The washer can be an annular, i.e. H. have self-contained deformation rib. In this case it is Inner diameter of the deformation rib larger than the outer diameter of the Smooth tube 45, the washer 43 is freely rotatable and to the longitudinal axis of the smooth tube inclined and eccentric to the pipe axis. The washer 43 rolls on from the surface of the smooth tube 45 when the well head 42 rotates and generates due to the eccentric bearing, a helical corrugation (see corrugated tube 46).

Soll ein Wellrohr mit ringförmiger Wellung erzeugt werden, wird eine Wellerscheibe 43 mit einer schraubenlinienförmig verlaufenden Verformungsrippe verwendet.If a corrugated tube with an annular corrugation is to be produced, a corrugated washer 43 used with a helical deformation rib.

Wird eine Wellerscheibe 43 mit einem schraubenlinienförmigen Verlauf der Verformungsrippe verwendet und ist die lichte Weite der Verformungsrippe kleiner als der Außendurchmesser des Glattrohres 45 und ist die Wellerscheibe 43 weder geneigt noch exzentrisch und auch nicht frei drehbar in dem Wellerkopf 42 gelagert, dann schraubt sich die Wellerscheibe 43 quasi auf das Glattrohr 45 auf und erzeugt dabei eine schraubenlinienförmige Wellung. Der Außendurchmesser des gewellten Rohres gemessen im Wellental entspricht dann in etwa der lichten Weite der Wellerscheibe 43.If a washer 43 with a helical shape of the Deformation rib is used and the inside width of the deformation rib is smaller than the outer diameter of the smooth tube 45 and the washer 43 is neither inclined still eccentrically and also not freely rotatable in the shaft head 42, then the wave washer 43 virtually screwed onto the smooth tube 45 and thereby produced a helical corrugation. The outside diameter of the corrugated pipe measured in the wave trough then corresponds approximately to the clear width of the wave washer 43.

Die Drehzahl des Hohlwellenmotors ist über ein festes Verhältnis jedoch abhängig von den Dimensionen des herzustellenden gewellten Metallrohres mit der Drehzahl des Elektromotors für die Abzugsvorrichtung gekoppelt. Die Geschwindigkeit, mit welcher das Glattrohr 45 dem Wellerkopf 42 zugeführt wird genügt der Formel V = n·s·c worin n die Drehzahl des Hohlwellenmotors, s die Steigung der Wellung und c der Faktor ist, welcher die Anzahl der Überrollungen pro Ring und die Einwellung berücksichtigt. Unter der Steigung versteht man den Abstand zweier Wellenkuppen voneinander. Die Drehzahl des Hohlwellenmotors wird mittels eines Resolvers oder Inkrementalgebers 47 gemessen.However, the speed of the hollow shaft motor is coupled to the speed of the electric motor for the trigger device via a fixed ratio, depending on the dimensions of the corrugated metal tube to be produced. The speed at which the smooth tube 45 is fed to the well head 42 satisfies the formula V = n · s · c where n is the speed of the hollow shaft motor, s is the slope of the corrugation and c is the factor which takes into account the number of rollovers per ring and the corrugation. The pitch is the distance between two wave crests. The speed of the hollow shaft motor is measured by means of a resolver or incremental encoder 47.

Weicht nun z. B. bedingt durch eine unterschiedliche Härte des Metallbandes die Drehzahl des Hohlwellenmotors von der vorgegebenen Drehzahl ab, so arbeitet der Wellerkopf 42 entweder auf Druck oder auf Zug. Bei einem Arbeiten auf Druck wird mehr Glattrohr 45 zugeführt als entsprechend der Drehzahl des Hohlwellenmotors und der Steigung vorgegeben ist, d. h. das Glattrohr 45 schiebt gegen die Wellerscheibe 43. Bei einem Arbeiten auf Zug ist es umgekehrt, die Wellerscheibe 43 versucht mehr Glattrohr 45 heranzuziehen.Now gives way B. due to a different hardness of the metal strip Speed of the hollow shaft motor from the specified speed, so the works Wellerkopf 42 either on pressure or on train. When working on pressure more smooth tube 45 supplied than corresponding to the speed of the hollow shaft motor and the slope is predetermined, d. H. the smooth tube 45 pushes against the washer 43. When working on a train, it is the other way round, the washer 43 tries more Pull up smooth tube 45.

Diese Veränderung der vorgegebenen Daten werden durch einen Meßaufnehmer 48 gemessen.This change in the specified data is determined by a sensor 48 measured.

Der Meßaufnehmer 48 kann entweder ein Linearpotentiometer, eine Druckmeßdose oder an sich bekannte Biegeelemente mit Dehnmeßstreifen bestückt sein. The sensor 48 can either be a linear potentiometer or a pressure cell or known bending elements can be equipped with strain gauges.

Der Meßwert wird in den Regelkreis eingegeben und die Drehzahl des Hohlwellenmotors entweder erhöht (bei Druck) oder verringert (bei Zug).The measured value is entered into the control loop and the speed of the hollow shaft motor either increased (when pushing) or decreased (when pulling).

Bei dem Ausführungsbeispiel nach Figur 3 ist der Hohlwellenmotor auf einem längsverschiebbaren Schlitten 49 gelagert, dessen Verschiebeweg durch das Linearpotentiometer 48 bzw. dessen auf eine Druckmeßdose oder Biegeelement einwirkende Axialkraft gemessen wird.In the embodiment of Figure 3, the hollow shaft motor is on one longitudinally displaceable slide 49, the displacement of which by Linear potentiometer 48 or its on a pressure cell or bending element acting axial force is measured.

Anhand der Figur 4 soll das Regelschema für das erfindungsgemäße Wellverfahren verdeutlicht werden.The control scheme for the corrugated process according to the invention is intended to be illustrated in FIG be made clear.

Vom Pult aus wird die Fertigungsgeschwindigkeit vorgegeben. Für die verschiedenen Rohrtypen, die sich im Durchmesser, der Welltiefe, der Wellsteigung und dem Bandmaterial unterscheiden können, ist ein empirisch ermitteltes Verhältnis isoll zwischen der Drehzahl des Abzuges nA und der Drehzahl nWeller vorgegeben.The production speed is specified from the console. For the different types of pipes, which can differ in diameter, the corrugation depth, the corrugation pitch and the strip material, an empirically determined ratio i soll between the speed of the take-off n A and the speed n Weller is specified.

Bei einer Erhöhung der Fertigungsgeschwindigkeit, z. B. beim Anfahren der Anlage wird die Drehzahl nA multiplikativ erhöht.With an increase in production speed, e.g. B. when starting the system, the speed n A is increased multiplicatively.

Verläßt der Wellerkopf seine axialkraftfreie Mittenlage, wird der von der Meßeinrichtung 48 ermittelte Wert entsprechend in den Regelkreis eingegeben und ein korrigiertes Verhältnis ikorr zu dem vorgegebenen Wert isoll addiert.If the shaft head leaves its central position free of axial force, the value determined by the measuring device 48 is correspondingly entered into the control loop and a corrected ratio i corr is added to the predetermined value i soll .

Auf diese Weise kann sehr schnell der gewünschte Wert der Wellerdrehzahl bei einer Abweichung korrigiert werden. Diese extrem schnelle Korrektur ist nur wegen der extrem geringen rotierenden Massen des Hohlwellenmotors möglich.In this way, the desired value of the shaft speed at a Deviation can be corrected. This extremely fast correction is only because of the extreme low rotating masses of the hollow shaft motor possible.

Claims (15)

  1. A method for the continuous manufacture of corrugated metal tubes with a longitudinal weld, during which a metal band is drawn from a supply coil, formed into a slotted tube and welded along its longitudinal edges, after which the welded straight tube is corrugated, wherein a pulling device driven by an electric motor holds the straight tube and the straight tube is corrugated by a corrugator disk, which is located inside a corrugator head with a rotary drive, characterized in that the corrugator head is driven directly by a hollow shaft motor.
  2. A method according to claim 1, characterized in that the shaft speed of the hollow shaft motor is controlled depending on the shaft speed of the electric motor of the pulling device.
  3. A method according to claim 1 or 2, characterized in that the rotor of the hollow shaft motor is suspended in the stator of the hollow shaft motor and can be moved in the longitudinal direction of the straight tube, that the displacement is measured, and that the shaft speed of the hollow shaft motor is corrected according to the displacement.
  4. A method according to one of the claims 1 or 2, characterized in that the hollow shaft motor is suspended on a carriage that is movable in the longitudinal direction of the straight tube, that the displacement is measured, and that the shaft speed of the hollow shaft motor is corrected depending on the displacement of the carriage.
  5. A method according to claim 3 or 4, characterized in that the displacement of the rotor or the carriage is measured by a linear potentiometer.
  6. A method according to claim 3 or 4, characterized in that the axial force acting on a fixed point due to the displacement of the rotor or the carriage is measured.
  7. A device for the continuous manufacture of corrugated metal tubes with a longitudinal weld, consisting of a supply coil for the metal band, a forming device that forms the metal band into a slotted tube, a welding device that welds the longitudinal slit of the slotted tube, a pulling device, driven by an electric motor, that holds onto the welded metal tube, and a corrugating device containing a corrugator head with a rotary drive and a corrugator disk inside the corrugator head, which creates the corrugations in the straight tube, characterized in that the corrugator head is driven by the rotor of a hollow shaft motor, which is designed as a tube.
  8. A device according to claim 7, characterized in that the corrugator head is attached to the rotor.
  9. A device according to claim 7 or 8, characterized in that the rotor is suspended in the stator in a manner that it can be moved along the longitudinal axis.
  10. A device according to one of the claims 7 to 9, characterized in that the rotor is longer than the stator in longitudinal direction.
  11. A device according to one of the claims 7 to 10, characterized in that the hollow shaft motor is mounted on a carriage that is movable in horizontal direction.
  12. A device according to one of the claims 7 to 11, characterized in that the shaft speed of the hollow shaft motor can be measured by a resolver or an incremental sensor.
  13. A device according to one of the claims 7 to 12, characterized in that the shaft speed of the hollow shaft motor is limited to 6000 rpm.
  14. A method according to claims 7 to 13, characterized in that the displacement of the rotor or the carriage can be measured by a linear potentiometer.
  15. A device according to one of the claims 7 to 14, characterized in that, force acting on the corrugator disk can be measured by a strain gage or a pressure cell and that the measured quantity is logged and fed to the control loop of the shaft speed control of the hollow shaft motor.
EP00400265A 2000-01-28 2000-01-28 Method for the continuous production of a longitudinally seam welded and corrugated metal tube and device for carrying out this method Expired - Lifetime EP1084774B1 (en)

Priority Applications (11)

Application Number Priority Date Filing Date Title
DK00400265T DK1084774T3 (en) 2000-01-28 2000-01-28 Process for Continuously Manufacturing Long-Seam Welded and Corrugated Metal Pipes and Device for Implementing the Process
EP00400265A EP1084774B1 (en) 2000-01-28 2000-01-28 Method for the continuous production of a longitudinally seam welded and corrugated metal tube and device for carrying out this method
PT00400265T PT1084774E (en) 2000-01-28 2000-01-28 METHOD FOR THE CONTINUOUS PRODUCTION OF A LONGITUDINALLY SOLVED METAL TUBE BY STRING AND WRINKLING AND DEVICE FOR THE PROCESS EXECUTION
ES00400265T ES2195842T3 (en) 2000-01-28 2000-01-28 PROCEDURE FOR THE CONTINUOUS MANUFACTURE OF A ROLLED AND WELDED METAL TUBE WITH A LONGITUDINAL AND DEVICE SEWING TO CARRY OUT THIS PROCEDURE.
AT00400265T ATE235974T1 (en) 2000-01-28 2000-01-28 METHOD FOR THE CONTINUOUS PRODUCTION OF LONGITUDINALLY WELDED AND CORRUPTED METAL PIPES AND DEVICE FOR IMPLEMENTING THE METHOD
DE50001596T DE50001596D1 (en) 2000-01-28 2000-01-28 Process for the continuous production of longitudinally welded and corrugated metal pipes and device for carrying out the process
CNB001380087A CN1214874C (en) 2000-01-28 2000-12-29 Method for continuous manufacturing longitudinal seam welding wave-form metal pipe
US09/759,239 US6405919B2 (en) 2000-01-28 2001-01-16 Process for the continuous production of longitudinally seam-welded and corrugated metal tubes
CA002332191A CA2332191C (en) 2000-01-28 2001-01-25 Process for the continuous production of longitudinally seam-welded and corrugated metal tubes
JP2001018319A JP2001232422A (en) 2000-01-28 2001-01-26 Method for continuously manufacturing metal tube having longitudinal seam welding and corrugated shape
KR1020010003686A KR100668584B1 (en) 2000-01-28 2001-01-26 Process for the continuous production of longitudinally seam-welded and corrugated metal tubes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP00400265A EP1084774B1 (en) 2000-01-28 2000-01-28 Method for the continuous production of a longitudinally seam welded and corrugated metal tube and device for carrying out this method

Publications (2)

Publication Number Publication Date
EP1084774A1 EP1084774A1 (en) 2001-03-21
EP1084774B1 true EP1084774B1 (en) 2003-04-02

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EP00400265A Expired - Lifetime EP1084774B1 (en) 2000-01-28 2000-01-28 Method for the continuous production of a longitudinally seam welded and corrugated metal tube and device for carrying out this method

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US (1) US6405919B2 (en)
EP (1) EP1084774B1 (en)
JP (1) JP2001232422A (en)
KR (1) KR100668584B1 (en)
CN (1) CN1214874C (en)
AT (1) ATE235974T1 (en)
CA (1) CA2332191C (en)
DE (1) DE50001596D1 (en)
DK (1) DK1084774T3 (en)
ES (1) ES2195842T3 (en)
PT (1) PT1084774E (en)

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EP2567762A1 (en) 2011-09-12 2013-03-13 Nexans Device for corrugating a metal tube
EP2752256A1 (en) 2013-01-07 2014-07-09 Nexans Device for corrugating a pipe
EP2821157A1 (en) 2013-07-04 2015-01-07 Nexans Device and method for applying a corrugation to a pipe

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EP2567762A1 (en) 2011-09-12 2013-03-13 Nexans Device for corrugating a metal tube
EP2752256A1 (en) 2013-01-07 2014-07-09 Nexans Device for corrugating a pipe
EP2821157A1 (en) 2013-07-04 2015-01-07 Nexans Device and method for applying a corrugation to a pipe

Also Published As

Publication number Publication date
KR20010078061A (en) 2001-08-20
EP1084774A1 (en) 2001-03-21
US20010010113A1 (en) 2001-08-02
ATE235974T1 (en) 2003-04-15
CN1306890A (en) 2001-08-08
US6405919B2 (en) 2002-06-18
KR100668584B1 (en) 2007-01-17
ES2195842T3 (en) 2003-12-16
DE50001596D1 (en) 2003-05-08
CN1214874C (en) 2005-08-17
CA2332191C (en) 2008-06-03
PT1084774E (en) 2003-08-29
JP2001232422A (en) 2001-08-28
DK1084774T3 (en) 2003-04-22
CA2332191A1 (en) 2001-07-28

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