EP0561025A1 - Device for bending tubes, in particular for making serpentine-shaped tubes - Google Patents

Device for bending tubes, in particular for making serpentine-shaped tubes Download PDF

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Publication number
EP0561025A1
EP0561025A1 EP92104760A EP92104760A EP0561025A1 EP 0561025 A1 EP0561025 A1 EP 0561025A1 EP 92104760 A EP92104760 A EP 92104760A EP 92104760 A EP92104760 A EP 92104760A EP 0561025 A1 EP0561025 A1 EP 0561025A1
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EP
European Patent Office
Prior art keywords
bending
rotation
tube
axis
drive
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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.)
Granted
Application number
EP92104760A
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German (de)
French (fr)
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EP0561025B1 (en
Inventor
Heinz Förster
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Schwarze Rigobert Dipl-Ing
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Publication of EP0561025A1 publication Critical patent/EP0561025A1/en
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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
    • B21D11/00—Bending not restricted to forms of material mentioned in only one of groups B21D5/00, B21D7/00, B21D9/00; Bending not provided for in groups B21D5/00 - B21D9/00; Twisting
    • B21D11/06—Bending into helical or spiral form; Forming a succession of return bends, e.g. serpentine form
    • B21D11/07—Making serpentine-shaped articles by bending essentially in one plane

Definitions

  • the invention relates to a device according to the preamble of claim 1.
  • Pipes or pipe coils produced with such devices are used in particular for convection heating surfaces of steam generators and heat exchangers. They are made from a straight tube corresponding to the length of the coil.
  • the invention has for its object to provide a device of the generic type, which is particularly simple and particularly easy to use.
  • a thornless cold bending of the tube also takes place in the invention.
  • the measures according to the invention make it possible in a particularly simple manner to alternate in opposite directions, i.e. alternately bend left and right so that any length of coils can be produced in one plane according to a given pipe length.
  • one bending roller namely the stationary bending roller
  • the other pivotable bending roller takes over the function of a pressure roller that bends the tube around the template.
  • This type of bending technology also makes it possible to ensure the quality of the pipe in the bent section. Due to the nature of the bend, an almost circular tube cross section is retained even in the bend section, which is only slightly reduced compared to the diameter in the straight region due to the deformation.
  • Claim 2 gives a particularly simple configuration of alternately with one axis of rotation or the other Rotational axis of connectable bending drive.
  • Claim 3 specifies an advantageous measure by means of which an axis of rotation can optionally be fixed in place relative to the machine table and can be released again.
  • the advantageous embodiment according to claim 4 ensures that the two bending rollers are combined to form a stable unit, only this relatively small tool block being pivoted for pipe bending.
  • Claims 5 to 9 indicate advantageous developments of this tool block.
  • pipe includes not only hollow, elongated, round bodies, but also elongated, solid bodies with a circular cross section, for example normal round metal material such as wires, rods or the like, even if the device according to the invention can be used particularly advantageously for the production of coils is.
  • a device for pipe bending is attached to a stationary machine table 1. It has a drive pulley 2 mounted on the machine table 1, which can be pivoted about its central axis 3 by means of a drive motor 4 attached to the underside of the machine table 1.
  • the drive motor 4 is either provided with a reversing gear or can rotate in both directions, so that the drive disk 2 can be driven in rotation in both directions about the axis 3.
  • the drive pulley 2 is provided on its upper side 5 facing away from the machine table 1 with a guide groove 6.
  • the central longitudinal axis 7 intersects the central axis 3 of the drive pulley 2 and extends at a right angle to the latter.
  • a sliding block 8 is arranged, which is freely displaceable in the direction of the axis 7 in the guide groove 6, but is guided largely without play transversely thereto.
  • a pipe bending tool block 9 can be coupled to the sliding block 8.
  • This has a lower coupling 10 and an upper coupling 11, which consist of approximately triangular plates with rounded corners and have the same outline shape.
  • two bending rollers 12, 13 are arranged, which are arranged in the congruent coupling 10, 11 by means of bearing bushes 14 around pivot pins 15,16 are rotatably mounted. These axes of rotation 15, 16 run parallel to the central axis 3 of the drive pulley 2.
  • the bending rollers 12, 13 are of identical design; they each have an approximately semicircular groove 17 on their circumference, the radius r of which is somewhat smaller than half the diameter of a pipe 18 to be bent. On both sides of the groove 17, the bending rollers 12, 13 have a cylindrical circumferential region 19, on which they abut one another, but are also arranged with little play to one another.
  • toothed disks 12 1/13 1 can be arranged on the tops of both rollers.
  • a pipe driver 20 On the upper coupling 11, a pipe driver 20 is attached, which has a linear drive arranged on the upper coupling 11 in the form of a hydraulically or pneumatically actuated piston-cylinder drive 21, the piston rod of which is provided with a fork-shaped gripper 22, which in the Intermediate space 23 between the upper and the lower coupling 11, 10 is retractable or can be pulled out of the latter.
  • the tube driver 20 is arranged between the two axes of rotation 15, 16, in such a way that it is arranged on the common tangent of the adjacent bending rollers 12, 13. He can intervene in an adapted depression 24 in the lower coupling 10 to increase the stability.
  • a machine boom 25 is attached to the machine table 1, which partially covers the tool block 9, specifically when the device is in its starting position is in which the central longitudinal axis 7 of the guide groove 6 is perpendicular to the feed direction 26 of the tube 18 and when the sliding block 8 is in a central position in the guide groove 6 and when the tool block 9 has such a position that the means -Axis 3 runs through the contact area 27 of the bending rollers 12, 13, in which the latter have the mentioned common tangent.
  • Couplings 28, 29 are mounted on the boom 25 at a distance a, which corresponds to the distance a between the two axes of rotation 15, 16.
  • These each consist of a linear drive in the form of a hydraulically actuated piston-cylinder drive 30, the respective piston rod plunger 32 of which has axial contact with a spacer 31 and can be inserted into or removed from the bearing bush 14 of the respective bending roller axis in the region of the upper coupling 11 .
  • the tool block 9 is thus fixed in such a way that its axis of rotation 15 or its axis of rotation 16 is held immovably relative to the machine table 1, but the tool block 9 can be pivoted about this defined axis.
  • spring bolts 33, 34 are mounted at a distance a from one another, which can each slide up into the corresponding bearing bush 14 in axial contact with the spacer bolts 31 in the region of the lower coupling 10.
  • the depressions 35 in the sliding block 8 limit the stroke of the spring bolts.
  • the spring bolt 33 or 34 is snapped into a bearing bush 14 which is assigned to the axis of rotation 15 or 16 which is not determined by the clutch 28 or 29. It is thus the case that one axis of rotation 15 is coupled to the sliding block 8 by means of a spring bolt 33, while the other axis of rotation 16 is connected in a stationary manner by means of the coupling 29 to the boom 25, and vice versa.
  • a side guide 36 and fixed tension for the tube 18 are arranged directly in front of the tool block 9 on the machine arm 25 in order to avoid deflections of the tube 18 transversely to the feed direction 26 during bending.
  • the axis of rotation 15 is connected to the sliding block 8 by means of the spring bolt 33, while the other axis of rotation 16 is fixed in place on the bracket 25 by means of the coupling 29.
  • the tube 18 is gripped and fixed by the gripper 22 between the couplings 10, 11 by appropriate actuation of the tube driver 20.
  • the drive pulley 2 is turned in the direction of rotation 37 for right-hand bending, ie driven clockwise by the drive motor 4.
  • the tool block 9 is now pivoted about the axis of rotation 16 lying eccentrically to the central axis 3 of the drive disk 2, ie the bending roller 13 does not change its position. It has the function of a template during this bending process.
  • the bending roller 12, the axis of rotation 15 of which is fixed relative to the sliding block 8, is carried along by the sliding block 8 due to the rotational movement of the drive pulley 2 and in this case bends the tube 18 around the bending roller 13 serving as a template to.
  • An intermediate position in which the tube 18 is bent by 90 ° can be seen in FIG. 6.
  • the drive pulley 2 has already been pivoted here by more than 90 °.
  • the end of the bending process is shown again in FIG. 5, where the position of the bending roller 12, the starting position of which is shown in dashed lines, is shown in solid lines.
  • the tube driver 20 is released by retracting the gripper 22 so that the tube 18 is no longer firmly connected to the tool block 9. Then the drive pulley 2 is pivoted back into the starting position against the direction of rotation 37. Subsequently, the tube 18 is pushed further in the feed direction 26, so that the already bent section 38 reaches the position shown in dashed lines in FIG. 7. Now the spring pin 34 is inserted into the bearing bush 14 assigned to the axis of rotation 16 in the region of the lower coupling 10 by spring pressure, by the right coupling 29 in the axis of rotation 16 extending the piston rod immersion pin pulls out the area of the upper coupling 11.
  • the coupling 28 is simultaneously moved into the bearing bush 14 associated with the axis of rotation 15, so that this and thus the bending roller 12 is fixed relative to the machine table 1.
  • the spring bolt 34 is pressed out of the bearing bush 14 by the spacer bolt 31.
  • the tube driver 20 is actuated again, so that the gripper 22 holds the tube from the contact area 27 of the bending rollers 12, 13.
  • the drive pulley 2 is pivoted by means of the drive motor 4 in the direction of rotation 39 for bending to the left, that is to say counterclockwise, by 180 °.
  • the sliding block 8 takes along the spring bolt 34 with the tool block 9, which is pivoted about the stationary axis of rotation 15 this time.
  • a bent section 40 of 180 ° is again produced.
  • the curved section 38 shown in dashed lines in FIG. 7 before the start of this second bending process is now in a position offset by 180 ° from this, which is shown in solid lines in FIG. 7.
  • the tube 18 is already provided with a double coil.
  • the drive pulley 2 can be pivoted back to its starting position again counter to the direction of rotation 39.
  • the next right-hand bending process can now follow, as has already been described with reference to FIGS. 5 and 6.
  • any number of alternately curved sections 38, 40 can be bent one after the other.
  • the distance L of the bent sections 38, 40 that is to say the length L of a pipe coil section, can be identical over the entire pipe coil, but it must be Not.
  • the lengths L can be selected individually from bending process to bending process.
  • the entire control of the device can be automated very easily via a process control, which is used to control the drive motor 4, the couplings 28, 29, the tube driver 20 and, if appropriate, a feed device (not shown) for feeding the tube 18.
  • a process control which is used to control the drive motor 4, the couplings 28, 29, the tube driver 20 and, if appropriate, a feed device (not shown) for feeding the tube 18.

Abstract

A device for producing alternate bends (38, 30) in a continuously fed straight tube (18), in particular for the production of a serpentine tube, has a machine table with two bending rollers (12, 13) which have mutually parallel axes (15, 16) of rotation at a fixed distance apart. On their respective circumferences, the bending rollers (12, 13) are provided with grooves which match the cross-section of the tube (18) and accommodate the said tube (18). A bending drive is furthermore provided. One bending roller has an axis of rotation which is fixed relative to the machine table while the other bending roller can be pivoted about the bending roller with the fixed axis of rotation by means of the bending drive, thereby bending a curved portion (38, 40) of the tube (18). In order to achieve a particularly simple structure and render handling especially simple, each of the axes (15, 16) of rotation in turn can be fixed while the other axis (16, 15) of rotation is coupled to the bending drive. The bending drive, can, moreover, be driven alternately in opposite directions. <IMAGE>

Description

Die Erfindung betrifft eine Einrichtung nach dem Oberbegriff des Anspruches 1.The invention relates to a device according to the preamble of claim 1.

Mit derartigen Einrichtungen gebogene Rohre bzw. hergestellte Rohrschlangen werden insbesondere für Konvektionsheizflächen von Dampferzeugern und Wärmeübertragern eingesetzt. Sie werden aus einem der gestreckten Länge der Rohrschlange entsprechenden geraden Rohr hergestellt.Pipes or pipe coils produced with such devices are used in particular for convection heating surfaces of steam generators and heat exchangers. They are made from a straight tube corresponding to the length of the coil.

Einrichtungen der gattungsgemäßen Art sind sogenannte Wändebiegemaschinen, bei denen zum wechselweisen Rechts- und Linksbiegen die gesamte Einrichtung jeweils um 180° geschwenkt wird. Um diese Schwenkung zu ermöglichen, ist beträchtlicher herstellungstechnischer Aufwand erforderlich. Aus diesem Grunde haben sich diese Einrichtungen nur begrenzt durchsetzen können.Devices of the generic type are so-called wall bending machines, in which the entire device is pivoted through 180 ° for alternate right and left bending. In order to enable this pivoting, considerable manufacturing effort is required. For this reason, these facilities have had limited success.

Weiterhin ist der Einsatz sogenannter Wendetische im Zusammenhang mit Rohrbiegemaschinen bekannt, die in nur einer Biegerichtung biegen können. Hierbei wird die gebogene Rohrschlange nach jeder Biegung um 180° geschwenkt. Auch diese bekannte Einrichtung ist technisch außerordentlich aufwendig und weist darüber hinaus arbeitsschutztechnische Probleme auf.Furthermore, the use of so-called turning tables in connection with pipe bending machines is known, which can bend in only one bending direction. The bent coil is swiveled by 180 ° after each bend. This known device is also technically extremely complex and also has industrial safety problems.

Der Erfindung liegt die Aufgabe zugrunde, eine Einrichtung der gattungsgemäßen Art zu schaffen, die besonders einfach aufgebaut und besonders einfach zu handhaben ist.The invention has for its object to provide a device of the generic type, which is particularly simple and particularly easy to use.

Diese Aufgabe wird erfindungsgemäß durch die Merkmale im Kennzeichnungsteil des Anspruches 1 gelöst. Auch bei der Erfindung erfolgt ein dornloses Kaltbiegen des Rohres. Durch die erfindungsgemäßen Maßnahmen ist es in besonders einfacher Weise möglich, abwechselnd gegensinnig, d.h. abwechselnd links und rechts zu biegen, so daß entsprechend einer vorgegebenen Rohrlänge beliebig lange Rohrschlangen in einer Ebene hergestellt werden können. Durch die erfindungsgemäßen Maßnahmen übernimmt jeweils eine Biegerolle, nämlich die ortsfest gehaltene Biegerolle, die Funktion einer Schablone, während die andere verschwenkbare Biegerolle die Funktion einer Druckrolle übernimmt, die das Rohr um die Schablone biegt. Durch diese Art der Biegetechnik ist es auch möglich, die Qualität des Rohres im gebogenen Abschnitt sicherzustellen. Durch die Art der Biegung bleibt ein nahezu kreisrunder Rohrquerschnitt auch im Bogenabschnitt erhalten, der lediglich durch die Verformung gegenüber dem Durchmesser im geradlinigen Bereich geringfügig reduziert ist.This object is achieved by the features in the characterizing part of claim 1. A thornless cold bending of the tube also takes place in the invention. The measures according to the invention make it possible in a particularly simple manner to alternate in opposite directions, i.e. alternately bend left and right so that any length of coils can be produced in one plane according to a given pipe length. With the measures according to the invention, one bending roller, namely the stationary bending roller, takes over the function of a template, while the other pivotable bending roller takes over the function of a pressure roller that bends the tube around the template. This type of bending technology also makes it possible to ensure the quality of the pipe in the bent section. Due to the nature of the bend, an almost circular tube cross section is retained even in the bend section, which is only slightly reduced compared to the diameter in the straight region due to the deformation.

Anspruch 2 gibt eine besonders einfache Ausgestaltung des wechselweise mit der einen Drehachse oder der anderen Drehachse koppelbaren Biegeantriebs an. Anspruch 3 gibt eine vorteilhafte Maßnahme an, mittels derer jeweils wahlweise eine Drehachse ortsfest gegenüber dem Maschinentisch festgelegt und wieder gelöst werden kann.Claim 2 gives a particularly simple configuration of alternately with one axis of rotation or the other Rotational axis of connectable bending drive. Claim 3 specifies an advantageous measure by means of which an axis of rotation can optionally be fixed in place relative to the machine table and can be released again.

Durch die vorteilhafte Ausgestaltung nach Anspruch 4 wird erreicht, daß die beiden Biegerollen zu einer stabilen Einheit zusammengefaßt sind, wobei lediglich dieser relativ kleine Werkzeugblock zum Rohrbiegen geschwenkt wird. Die Ansprüche 5 bis 9 geben vorteilhafte Weiterbildungen dieses Werkzeugblockes an.The advantageous embodiment according to claim 4 ensures that the two bending rollers are combined to form a stable unit, only this relatively small tool block being pivoted for pipe bending. Claims 5 to 9 indicate advantageous developments of this tool block.

Der Begriff "Rohr" umfaßt nicht nur hohle langgestreckte runde Körper, sondern auch langgestreckte, massive Körper mit kreisrundem Querschnitt, beispielsweise also normales Rundmaterial aus Metall wie Drähte, Stangen od.dgl., auch wenn die erfindungsgemäße Einrichtung besonders vorteilhaft zur Herstellung von Rohrschlangen einsetzbar ist.The term "pipe" includes not only hollow, elongated, round bodies, but also elongated, solid bodies with a circular cross section, for example normal round metal material such as wires, rods or the like, even if the device according to the invention can be used particularly advantageously for the production of coils is.

Weitere Vorteile, Merkmale und Einzelheiten der Erfindung ergeben sich aus der nachfolgenden Beschreibung eines Ausführungsbeispieles anhand der Zeichnung. Es zeigt

Fig. 1
eine Draufsicht auf eine Einrichtung gemäß der Erfindung,
Fig. 2
einen vertikalen Längsschnitt durch die Einrichtung gemäß der Schnittlinie II-II in Fig. 1,
Fig. 3
einen vertikalen Querschnitt durch die Einrichtung entsprechend der Schnittlinie III-III in Fig. 1,
Fig. 4
einen Teilausschnitt aus Fig. 3 in vergrößertem Maßstab,
Fig. 5,6
den Bewegungsablauf der Einrichtung beim Rechtsbiegen und
Fig. 7
den Bewegungsablauf beim Linksbiegen eines Rohres.
Further advantages, features and details of the invention result from the following description of an exemplary embodiment with reference to the drawing. It shows
Fig. 1
a plan view of a device according to the invention,
Fig. 2
a vertical longitudinal section through the device according to section line II-II in Fig. 1,
Fig. 3
a vertical cross section through the device according to section line III-III in Fig. 1,
Fig. 4
3 shows a partial section from FIG. 3 on an enlarged scale,
Fig. 5.6
the movement of the device when turning right and
Fig. 7
the sequence of movements when bending a pipe to the left.

Auf einem ortsfesten Maschinentisch 1 ist eine Einrichtung zum Rohrbiegen angebracht. Sie weist eine auf dem Maschinentisch 1 gelagerte Antriebsscheibe 2 auf, die um ihre Mittel-Achse 3 mittels eines an der Unterseite des Maschinentisches 1 angebrachten Antriebsmotors 4 schwenkantreibbar ist. Der Antriebsmotor 4 ist entweder mit einem Wendegetriebe versehen oder kann in beiden Richtungen drehen, so daß die Antriebsscheibe 2 in beiden Drehrichtungen um die Achse 3 drehantreibbar ist. Die Antriebsscheibe 2 ist auf ihrer dem Maschinentisch 1 abgewandten Oberseite 5 mit einer Führungsnut 6 versehen. Deren Mittel-Längs-Achse 7 schneidet die Mittel-Achse 3 der Antriebsscheibe 2 und verläuft unter einem rechten Winkel zu dieser. In der Führungsnut 6 ist ein Kulissenstein 8 angeordnet, der in Richtung der Achse 7 in der Führungsnut 6 frei verschiebbar ist, quer dazu aber weitestgehend spielfrei geführt ist.A device for pipe bending is attached to a stationary machine table 1. It has a drive pulley 2 mounted on the machine table 1, which can be pivoted about its central axis 3 by means of a drive motor 4 attached to the underside of the machine table 1. The drive motor 4 is either provided with a reversing gear or can rotate in both directions, so that the drive disk 2 can be driven in rotation in both directions about the axis 3. The drive pulley 2 is provided on its upper side 5 facing away from the machine table 1 with a guide groove 6. The central longitudinal axis 7 intersects the central axis 3 of the drive pulley 2 and extends at a right angle to the latter. In the guide groove 6 a sliding block 8 is arranged, which is freely displaceable in the direction of the axis 7 in the guide groove 6, but is guided largely without play transversely thereto.

Mit dem Kulissenstein 8 ist ein Rohr-Biege-Werkzeugblock 9 koppelbar. Dieser weist eine untere Koppel 10 und eine obere Koppel 11 auf, die aus etwa dreieckförmigen Platten mit abgerundeten Ecken bestehen und gleiche Umrißform aufweisen. Zwischen der unteren und der oberen Koppel sind zwei Biegerollen 12,13 angeordnet, die in den beiden deckungsgleich angeordneten Koppeln 10,11 mittels Lagerbüchsen 14 um Drehachsbolzen 15,16 drehbar gelagert sind. Diese Drehachsen 15, 16 verlaufen parallel zur Mittel-Achse 3 der Antriebsscheibe 2. Die Biegerollen 12,13 sind identisch ausgebildet; sie weisen auf ihrem Umfang jeweils eine etwa halbkreisförmige Nut 17 auf, deren Radius r etwas kleiner als der halbe Durchmesser eines zu biegenden Rohres 18 ist. Beiderseits der Nut 17 weisen die Biegerollen 12,13 einen zylindrischen Umfangsbereich 19 auf, an dem sie aneinander anliegen, aber auch mit geringem Spiel zueinander angeordnet sind.A pipe bending tool block 9 can be coupled to the sliding block 8. This has a lower coupling 10 and an upper coupling 11, which consist of approximately triangular plates with rounded corners and have the same outline shape. Between the lower and the upper coupling two bending rollers 12, 13 are arranged, which are arranged in the congruent coupling 10, 11 by means of bearing bushes 14 around pivot pins 15,16 are rotatably mounted. These axes of rotation 15, 16 run parallel to the central axis 3 of the drive pulley 2. The bending rollers 12, 13 are of identical design; they each have an approximately semicircular groove 17 on their circumference, the radius r of which is somewhat smaller than half the diameter of a pipe 18 to be bent. On both sides of the groove 17, the bending rollers 12, 13 have a cylindrical circumferential region 19, on which they abut one another, but are also arranged with little play to one another.

Für die planmäßige Abwälzung der Druck- gegen die Schablonenrolle lassen sich auf den Oberseiten beider Rollen aufgesetzte Zahnscheiben 12₁/13₁ anordnen.For the scheduled rolling of the pressure roller against the stencil roller, toothed disks 12 1/13 1 can be arranged on the tops of both rollers.

An der oberen Koppel 11 ist ein Rohr-Mitnehmer 20 angebracht, der einen auf der oberen Koppel 11 angeordneten Linearantrieb in Form eines hydraulisch oder pneumatisch beaufschlagbaren Kolben-Zylinder-Antriebs 21 aufweist, dessen Kolbenstange mit einem gabelförmigen Greifer 22 versehen ist, der in den Zwischenraum 23 zwischen der oberen und der unteren Koppel 11,10 einfahrbar bzw. aus diesem nach oben herausziehbar ist. Der Rohr-Mitnehmer 20 ist zwischen den beiden Drehachsen 15,16 angeordnet, und zwar derart, daß er auf der gemeinsamen Tangente der aneinanderliegenden Biegerollen 12,13 angeordnet ist. Er kann zur Erhöhung der Stabilität in eine angepaßte Einsenkung 24 in der unteren Koppel 10 eingreifen.On the upper coupling 11, a pipe driver 20 is attached, which has a linear drive arranged on the upper coupling 11 in the form of a hydraulically or pneumatically actuated piston-cylinder drive 21, the piston rod of which is provided with a fork-shaped gripper 22, which in the Intermediate space 23 between the upper and the lower coupling 11, 10 is retractable or can be pulled out of the latter. The tube driver 20 is arranged between the two axes of rotation 15, 16, in such a way that it is arranged on the common tangent of the adjacent bending rollers 12, 13. He can intervene in an adapted depression 24 in the lower coupling 10 to increase the stability.

Am Maschinentisch 1 ist ein Maschinen-Ausleger 25 angebracht, der den Werkzeugblock 9 teilweise überdeckt, und zwar, wenn sich die Einrichtung in ihrer Ausgangsstellung befindet, in der die Mittel-Längs-Achse 7 der Führungsnut 6 senkrecht zur Zuführrichtung 26 des Rohres 18 befindet und wenn der Kulissenstein 8 sich in einer mittleren Stellung in der Führungsnut 6 befindet und wenn der Werkzeugblock 9 eine derartige Lage hat, daß die Mittel-Achse 3 durch den Berührungsbereich 27 der Biegerollen 12,13 verläuft, in dem letztere die erwähnte gemeinsame Tangente haben.A machine boom 25 is attached to the machine table 1, which partially covers the tool block 9, specifically when the device is in its starting position is in which the central longitudinal axis 7 of the guide groove 6 is perpendicular to the feed direction 26 of the tube 18 and when the sliding block 8 is in a central position in the guide groove 6 and when the tool block 9 has such a position that the means -Axis 3 runs through the contact area 27 of the bending rollers 12, 13, in which the latter have the mentioned common tangent.

Auf dem Ausleger 25 sind im Abstand a, der dem Abstand a der beiden Drehachsen 15,16 entspricht, Kupplungen 28,29 angebracht. Diese bestehen jeweils aus einem Linearantrieb in Form eines hydraulisch beaufschlagbaren Kolben-Zylinder-Antriebs 30, dessen jeweilige Kolbenstangentauchbolzen 32 mit einem Distanzbolzen 31 axialen Kontakt hat und in die Lagerbuchse 14 der jeweiligen Biegerollenachse im Bereich der oberen Koppel 11 einschiebbar bzw. aus dieser herausziehbar ist. Je nachdem, welche der beiden Kupplungen 28,29 betätigt wird, wird also der Werkzeugblock 9 derart festgelegt, daß seine Drehachse 15 oder seine Drehachse 16 gegenüber dem Maschinentisch 1 unverschiebbar festgehalten wird, wobei der Werkzeugblock 9 aber um diese festgelegte Achse verschwenkt werden kann.Couplings 28, 29 are mounted on the boom 25 at a distance a, which corresponds to the distance a between the two axes of rotation 15, 16. These each consist of a linear drive in the form of a hydraulically actuated piston-cylinder drive 30, the respective piston rod plunger 32 of which has axial contact with a spacer 31 and can be inserted into or removed from the bearing bush 14 of the respective bending roller axis in the region of the upper coupling 11 . Depending on which of the two clutches 28, 29 is actuated, the tool block 9 is thus fixed in such a way that its axis of rotation 15 or its axis of rotation 16 is held immovably relative to the machine table 1, but the tool block 9 can be pivoted about this defined axis.

Auf dem Kulissenstein 8 sind Federbolzen 33,34 im Abstand a voneinander angebracht, die jeweils in die entsprechende Lagerbüchse 14 im axialen Kontakt mit den Distanzbolzen 31 im Bereich der unteren Koppel 10 hochschieben können. Die Einsenkungen 35 in dem Kulissenstein 8 begrenzen den Hub der Federbolzen. Es wird jeweils der Federbolzen 33 bzw. 34 in eine Lagerbüchse 14 eingerastet, die der Drehachse 15 bzw. 16 zugeordnet ist, die nicht durch die Kupplung 28 bzw. 29 festgelegt ist. Es ist also so, daß eine Drehachse 15 mittels eines Federbolzens 33 mit dem Kulissenstein 8 gekoppelt wird, während die andere Drehachse 16 mittels der Kupplung 29 mit dem Ausleger 25 ortsfest verbunden wird, und umgekehrt.On the sliding block 8, spring bolts 33, 34 are mounted at a distance a from one another, which can each slide up into the corresponding bearing bush 14 in axial contact with the spacer bolts 31 in the region of the lower coupling 10. The depressions 35 in the sliding block 8 limit the stroke of the spring bolts. In each case the spring bolt 33 or 34 is snapped into a bearing bush 14 which is assigned to the axis of rotation 15 or 16 which is not determined by the clutch 28 or 29. It is thus the case that one axis of rotation 15 is coupled to the sliding block 8 by means of a spring bolt 33, while the other axis of rotation 16 is connected in a stationary manner by means of the coupling 29 to the boom 25, and vice versa.

In Zuführrichtung 26 des Rohres 18 gesehen, ist unmittelbar vor dem Werkzeugblock 9 am Maschinen-Ausleger 25 eine Seiten-Führung 36 und Festspannung für das Rohr 18 angeordnet, um Auslenkungen des Rohres 18 quer zur Zuführrichtung 26 beim Biegen zu vermeiden.Seen in the feed direction 26 of the tube 18, a side guide 36 and fixed tension for the tube 18 are arranged directly in front of the tool block 9 on the machine arm 25 in order to avoid deflections of the tube 18 transversely to the feed direction 26 during bending.

Die Wirkungsweise wird anhand der Fig. 5 bis 7 erläutert. In der Ausgangsstellung der Antriebsscheibe 2 und des Werkzeugblocks 9 verläuft die Mittel-Längs-Achse 7 der Führungsnut 6 senkrecht zur Zuführrichtung 26 für ein Rohr 18. Es wird ein Rohr 18 im Berührungsbereich 27 der Biegerollen 12,13 zwischen diesen hindurchgeschoben. Beide Biegerollen haben im Berührungs- bzw. Tangentenbereich 27 einen Radius r der Biegerollennut, der geringfügig größer als der halbe Rohrdurchmesser ist. Dies gilt sowohl für den Berührungsbereich beim Biegebeginn als auch beim Biegeende des jeweiligen 180°-Rohrbogens. Für das in den Fig. 5 und 6 dargestellte Rechtsbiegen wird die Drehachse 15 mittels des Federbolzens 33 mit dem Kulissenstein 8 verbunden, während die andere Drehachse 16 mittels der Kupplung 29 am Ausleger 25 ortsfest festgelegt wird. Das Rohr 18 wird durch entsprechende Betätigung des Rohr-Mitnehmers 20 vom Greifer 22 zwischen den Koppeln 10,11 umfaßt und festgelegt. Anschließend wird die Antriebsscheibe 2 in Drehrichtung 37 für Rechtsbiegen, d.h. im Uhrzeigersinn vom Antriebsmotor 4 angetrieben. Der Werkzeugblock 9 wird jetzt um die exzentrisch zur Mittel-Achse 3 der Antriebsscheibe 2 liegende Drehachse 16 verschwenkt, d.h. die Biegerolle 13 verändert ihre Lage nicht. Sie hat bei diesem Biegevorgang die Funktion einer Schablone. Demgegenüber wird die Biegerolle 12, deren Drehachse 15 relativ zum Kulissenstein 8 festgelegt ist, aufgrund der Drehbewegung der Antriebsscheibe 2 vom Kulissenstein 8 mitgenommen und biegt hierbei das Rohr 18 um die als Schablone dienende Biegerolle 13. Hierbei kommt der Biegerolle 12 also die Funktion einer Druckrolle zu. Eine Zwischenstellung, in der das Rohr 18 um 90° gebogen ist, ist Fig. 6 zu entnehmen. Es sei darauf hingewiesen, daß die Antriebsscheibe 2 hierbei jetzt bereits um mehr als 90° geschwenkt ist. Das Ende des Biegevorganges ist wieder in Fig. 5 dargestellt, wo die Stellung der Biegerolle 12, deren Ausgangsstellung gestrichelt dargestellt ist, ausgezogen dargestellt ist.The mode of operation is explained with reference to FIGS. 5 to 7. In the starting position of the drive pulley 2 and the tool block 9, the central longitudinal axis 7 of the guide groove 6 runs perpendicular to the feed direction 26 for a tube 18. A tube 18 is pushed between the bending rollers 12, 13 in the contact region 27 thereof. Both bending rollers have a radius r of the bending roller groove in the contact or tangent region 27, which is slightly larger than half the tube diameter. This applies both to the contact area at the beginning of the bend and at the end of the bend of the respective 180 ° pipe bend. 5 and 6, the axis of rotation 15 is connected to the sliding block 8 by means of the spring bolt 33, while the other axis of rotation 16 is fixed in place on the bracket 25 by means of the coupling 29. The tube 18 is gripped and fixed by the gripper 22 between the couplings 10, 11 by appropriate actuation of the tube driver 20. Then the drive pulley 2 is turned in the direction of rotation 37 for right-hand bending, ie driven clockwise by the drive motor 4. The tool block 9 is now pivoted about the axis of rotation 16 lying eccentrically to the central axis 3 of the drive disk 2, ie the bending roller 13 does not change its position. It has the function of a template during this bending process. In contrast, the bending roller 12, the axis of rotation 15 of which is fixed relative to the sliding block 8, is carried along by the sliding block 8 due to the rotational movement of the drive pulley 2 and in this case bends the tube 18 around the bending roller 13 serving as a template to. An intermediate position in which the tube 18 is bent by 90 ° can be seen in FIG. 6. It should be pointed out that the drive pulley 2 has already been pivoted here by more than 90 °. The end of the bending process is shown again in FIG. 5, where the position of the bending roller 12, the starting position of which is shown in dashed lines, is shown in solid lines.

Anschließend wird der Rohr-Mitnehmer 20 durch Zurückfahren des Greifers 22 gelöst, so daß das Rohr 18 nicht mehr mit dem Werkzeugblock 9 fest verbunden ist. Danach wird die Antriebsscheibe 2 entgegen der Drehrichtung 37 in ihre Ausgangsstellung zurückverschwenkt. Im Anschluß daran wird das Rohr 18 in Zuführrichtung 26 weitergeschoben, so daß der bereits gebogene Abschnitt 38 in die in Fig. 7 gestrichelt dargestellte Stellung gelangt. Jetzt wird der Federbolzen 34 in die der Drehachse 16 zugeordnete Lagerbüchse 14 im Bereich der unteren Koppel 10 durch Federdruck eingefahren, indem die rechte Kupplung 29 in der Drehachse 16 den Kolbenstangentauchbolzen aus dem Bereich der oberen Koppel 11 herauszieht. Die Kupplung 28 wird gleichzeitig in die der Drehachse 15 zugeordnete Lagerbüchse 14 eingefahren, so daß diese und damit die Biegerolle 12 relativ zum Maschinentisch 1 festgelegt ist. Der Federbolzen 34 wird dabei durch den Distanzbolzen 31 aus der Lagerbüchse 14 gedrückt. Der Rohr-Mitnehmer 20 wird wieder betätigt, so daß der Greifer 22 das Rohr von dem Berührungsbereich 27 der Biegerollen 12,13 festhält. Dann wird die Antriebsscheibe 2 mittels des Antriebsmotors 4 in Drehrichtung 39 für Linksbiegen, also entgegen dem Uhrzeigersinn, um 180° verschwenkt. Hierbei nimmt der Kulissenstein 8 über den Federbolzen 34 den Werkzeugblock 9 mit, der um die diesmal stationäre Drehachse 15 verschwenkt wird. Es wird wiederum ein gebogener Abschnitt 40 von 180° hergestellt. Der vor Beginn dieses zweiten Biegevorganges in Fig. 7 gestrichelt gezeigte gebogene Abschnitt 38 befindet sich jetzt in einer um 180° hiergegen versetzten Position, die in Fig. 7 ausgezogen dargestellt ist. Das Rohr 18 ist bereits jetzt mit einer doppelten Rohrschlange versehen. Nach Lösen des Rohr-Mitnehmers 20 kann die Antriebsscheibe 2 wieder entgegen der Drehrichtung 39 um 180° in ihre Ausgangsstellung zurückgeschwenkt werden. Es kann sich jetzt der nächste Rechtsbiege-Vorgang anschließen, wie er bereits unter Bezugnahme auf die Fig. 5 und 6 beschrieben wurde. Mit der geschilderten Einrichtung können also beliebig viele abwechselnd gebogene Abschnitte 38,40 nacheinander gebogen werden. Der Abstand L der gebogenen Abschnitte 38, 40, also die Länge L eines Rohrschlangenabschnitts kann über die gesamte Rohrschlange identisch sein, muß es aber nicht. Die Längen L können von Biegevorgang zu Biegevorgang individuell gewählt werden.Subsequently, the tube driver 20 is released by retracting the gripper 22 so that the tube 18 is no longer firmly connected to the tool block 9. Then the drive pulley 2 is pivoted back into the starting position against the direction of rotation 37. Subsequently, the tube 18 is pushed further in the feed direction 26, so that the already bent section 38 reaches the position shown in dashed lines in FIG. 7. Now the spring pin 34 is inserted into the bearing bush 14 assigned to the axis of rotation 16 in the region of the lower coupling 10 by spring pressure, by the right coupling 29 in the axis of rotation 16 extending the piston rod immersion pin pulls out the area of the upper coupling 11. The coupling 28 is simultaneously moved into the bearing bush 14 associated with the axis of rotation 15, so that this and thus the bending roller 12 is fixed relative to the machine table 1. The spring bolt 34 is pressed out of the bearing bush 14 by the spacer bolt 31. The tube driver 20 is actuated again, so that the gripper 22 holds the tube from the contact area 27 of the bending rollers 12, 13. Then the drive pulley 2 is pivoted by means of the drive motor 4 in the direction of rotation 39 for bending to the left, that is to say counterclockwise, by 180 °. Here, the sliding block 8 takes along the spring bolt 34 with the tool block 9, which is pivoted about the stationary axis of rotation 15 this time. A bent section 40 of 180 ° is again produced. The curved section 38 shown in dashed lines in FIG. 7 before the start of this second bending process is now in a position offset by 180 ° from this, which is shown in solid lines in FIG. 7. The tube 18 is already provided with a double coil. After loosening the tube driver 20, the drive pulley 2 can be pivoted back to its starting position again counter to the direction of rotation 39. The next right-hand bending process can now follow, as has already been described with reference to FIGS. 5 and 6. With the described device, any number of alternately curved sections 38, 40 can be bent one after the other. The distance L of the bent sections 38, 40, that is to say the length L of a pipe coil section, can be identical over the entire pipe coil, but it must be Not. The lengths L can be selected individually from bending process to bending process.

Die gesamte Ansteuerung der Einrichtung läßt sich sehr leicht über eine Prozeßsteuerung automatisieren, die zur Ansteuerung des Antriebsmotors 4, der Kupplungen 28,29, des Rohr-Mitnehmers 20 und gegebenenfalls noch einer nicht definitiv dargestellten Zuführeinrichtung zum Zuführen des Rohres 18 dient.The entire control of the device can be automated very easily via a process control, which is used to control the drive motor 4, the couplings 28, 29, the tube driver 20 and, if appropriate, a feed device (not shown) for feeding the tube 18.

Claims (9)

Einrichtung zum Herstellen von abwechselnd gegensinnig gebogenen Abschnitten (38,40) an einem fortlaufend zuführbaren geraden Rohr (18), insbesondere zum Herstellen einer Rohrschlage, mit einem Maschinentisch (1), mit zwei Biegerollen (12,13), die zueinander im festen Abstand (a) und parallel zueinander verlaufende Drehachsen (15,16) aufweisen und die an ihrem jeweiligen Umfang mit dem Querschnitt des Rohres (18) angepaßten, das Rohr (18) aufnehmenden Nuten (17) versehen sind und mit einem Biegeantrieb, wobei eine Biegerolle eine relativ zum Maschinentisch (1) ortsfeste Drehachse aufweist, während die andere Biegerolle mittels des Biegeantriebs unter Biegen eines gebogenen Abschnittes (38,40) des Rohres (18) um die Biegerolle mit ortsfester Drehachse schwenkbar ist, dadurch gekennzeichnet, daß jeweils abwechselnd eine Drehachse (15,16) ortsfest festlegbar und die jeweils andere Drehachse (16,15) mit dem Biegeantrieb koppelbar ist und daß der Biegeantrieb abwechselnd gegensinnig antreibbar ist.Device for producing alternately bent sections (38, 40) on a continuously feedable straight pipe (18), in particular for producing a pipe run, with a machine table (1), with two bending rollers (12, 13) that are at a fixed distance from one another (a) and axes of rotation (15, 16) running parallel to one another and the grooves (17) which are adapted to the respective circumference of the tube (18) and which accommodate the tube (18) and are provided with a bending drive, a bending roller has a fixed axis of rotation relative to the machine table (1), while the other bending roller can be pivoted about the bending roller with a fixed axis of rotation by means of the bending drive by bending a bent section (38, 40) of the tube (18), characterized in that in each case one axis of rotation alternately (15,16) fixed and the other axis of rotation (16,15) can be coupled to the bending drive and that the bending drive alternately in opposite directions is drivable. Einrichtung nach Anspruch 1, dadurch gekennzeichnet, daß der Biegeantrieb eine drehantreibbare Antriebsscheibe (2) mit einer Führungsnut (6) aufweist, in der ein Kulissenstein (8) verschiebbar geführt ist, der wahlweise mit einer Drehachse (15,16) koppelbar ist.Device according to claim 1, characterized in that the bending drive has a drive disc (2) which can be driven in rotation and has a guide groove (6) in which a sliding block (8) is guided, which can optionally be coupled to an axis of rotation (15, 16). Einrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß ortsfest zum Maschinentisch (1) Kupplungen (28,29) vorgesehen sind, die wahlweise mit der jeweiligen ortsfesten Drehachse (15,16) koppelbar sind.Device according to claim 1 or 2, characterized in that couplings fixed to the machine table (1) (28, 29) are provided, which can optionally be coupled to the respective fixed axis of rotation (15, 16). Einrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Biegerollen (12,13) zu einem Rohr-Biege-Werkzeugblock (9) zusammengefaßt sind, der mindestens eine die Biegerollen (12,13) tragende Koppel (10,11) aufweist.Device according to one of claims 1 to 3, characterized in that the bending rollers (12, 13) are combined to form a tube-bending tool block (9) which has at least one coupling (10, 11) carrying the bending rollers (12, 13). having. Einrichtung nach Anspruch 4, dadurch gekennzeichnet, daß der Werkzeugblock (9) eine untere Koppel (10) und eine oberen Koppel (11) aufweist, die die Biegerollen (12,13) in einem Zwischenraum (23) zwischen sich aufnehmen und lagern.Device according to claim 4, characterized in that the tool block (9) has a lower coupling (10) and an upper coupling (11) which receive and store the bending rollers (12, 13) in an intermediate space (23) between them. Einrichtung nach Anspruch 1 und 5, dadurch gekennzeichnet, daß der Werkzeugblock (9) in einer Biegerollenachse (15 oder 16) mit dem Biegeantrieb verbindbar ist.Device according to claims 1 and 5, characterized in that the tool block (9) can be connected to the bending drive in a bending roller axis (15 or 16). Einrichtung nach Anspruch 3 und 5, dadurch gekennzeichnet, daß der Werkzeugblock (9) wahlweise mit einer Kupplung (28,29) in Eingriff bringbar ist.Device according to claims 3 and 5, characterized in that the tool block (9) can optionally be brought into engagement with a coupling (28, 29). Einrichtung nach Anspruch 4, dadurch gekennzeichnet, daß der Werkzeugblock (9) einen Rohr-Mitnehmer (20) trägt.Device according to claim 4, characterized in that the tool block (9) carries a tube driver (20). Einrichtung nach Anspruch 8, dadurch gekennzeichnet, daß der Rohr-Mitnehmer (20) einen quer zum Rohr und parallel zu den Drehachsen (15,16) axial verschiebbaren Greifer (22) aufweist.Device according to claim 8, characterized in that the tube driver (20) has a gripper (22) which can be moved axially transversely to the tube and parallel to the axes of rotation (15, 16).
EP92104760A 1991-02-04 1992-03-19 Device for bending tubes, in particular for making serpentine-shaped tubes Expired - Lifetime EP0561025B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4103134A DE4103134C2 (en) 1991-02-04 1991-02-04 Device for the production of bent sections on a pipe, in particular for the production of a pipe coil
US07/855,365 US5373719A (en) 1991-02-04 1992-03-20 Device for generating bent portions in a pipe, particularly for generating a pipe coil

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EP0561025A1 true EP0561025A1 (en) 1993-09-22
EP0561025B1 EP0561025B1 (en) 1996-05-29

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WO1997037785A1 (en) * 1996-04-10 1997-10-16 Robolix Machine for bending or cambering a profile section, and bending head therefor
FR2944984A1 (en) * 2009-04-29 2010-11-05 Marc Dabrigeon METHOD AND DEVICE FOR MANUFACTURING A SERPENTINE
DE102012019183A1 (en) * 2012-09-28 2014-04-03 Ulrich Zimmer Device for bending pipe material, particularly brake lines or fuel lines, has hinge bending head pivotally mounted at bending tower and intermediate gear mounted on pivotal receiving lever of hinge bending head
WO2017134330A1 (en) * 2016-02-01 2017-08-10 Itula Oy An apparatus and a method for manufacturing a meander tube

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KR0182069B1 (en) * 1995-06-22 1999-04-01 송병준 Bent-up system of cutting blade
US7188504B2 (en) * 2000-02-21 2007-03-13 Ateliers De Constructions Mecaniques Latour Et Fils Wire bending device
US20070125143A1 (en) * 2004-07-21 2007-06-07 Mcgushion Kevin D Jr Center shifted roll forming
CN104889212B (en) * 2015-06-11 2017-01-18 张家港江苏科技大学产业技术研究院 Wheel mould device for two-way pipe bending
CN113102577A (en) * 2021-04-01 2021-07-13 白红涛 Notebook computer heat dissipation copper pipe forming device

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FR1081265A (en) * 1952-05-23 1954-12-17 Babcock & Wilcox France Device for bending straight tubes into a tubular coil consisting of a series of alternating corrugations
FR2125193A1 (en) * 1971-02-18 1972-09-29 Gol Sp Kon Coiled tube mfr - by a high-performance machine employing two drive shafts

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997037785A1 (en) * 1996-04-10 1997-10-16 Robolix Machine for bending or cambering a profile section, and bending head therefor
FR2747328A1 (en) * 1996-04-10 1997-10-17 Robolix Sa BENDING OR CAMPING MACHINE FOR A PROFILE, AND BENDING HEAD FOR SUCH A MACHINE
US6134932A (en) * 1996-04-10 2000-10-24 Robolix Machine for bending or cambering a profile section, and bending head therefor
FR2944984A1 (en) * 2009-04-29 2010-11-05 Marc Dabrigeon METHOD AND DEVICE FOR MANUFACTURING A SERPENTINE
EP2248613A1 (en) * 2009-04-29 2010-11-10 Dabrigeon, Mark Method and apparatus for manufacturing a serpentine
DE102012019183A1 (en) * 2012-09-28 2014-04-03 Ulrich Zimmer Device for bending pipe material, particularly brake lines or fuel lines, has hinge bending head pivotally mounted at bending tower and intermediate gear mounted on pivotal receiving lever of hinge bending head
WO2017134330A1 (en) * 2016-02-01 2017-08-10 Itula Oy An apparatus and a method for manufacturing a meander tube

Also Published As

Publication number Publication date
US5373719A (en) 1994-12-20
EP0561025B1 (en) 1996-05-29
DE4103134A1 (en) 1992-08-06
DE4103134C2 (en) 2000-12-07

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