EP0118739A2 - Pipe-bending arrangement - Google Patents

Pipe-bending arrangement Download PDF

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Publication number
EP0118739A2
EP0118739A2 EP84101144A EP84101144A EP0118739A2 EP 0118739 A2 EP0118739 A2 EP 0118739A2 EP 84101144 A EP84101144 A EP 84101144A EP 84101144 A EP84101144 A EP 84101144A EP 0118739 A2 EP0118739 A2 EP 0118739A2
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EP
European Patent Office
Prior art keywords
bending system
pipe bending
pipe
tube
template
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.)
Granted
Application number
EP84101144A
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German (de)
French (fr)
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EP0118739B1 (en
EP0118739A3 (en
Inventor
Theo Molz
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Eckold AG
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W ECKOLD AG
Eckold AG
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Publication date
Application filed by W ECKOLD AG, Eckold AG filed Critical W ECKOLD AG
Priority to AT84101144T priority Critical patent/ATE26547T1/en
Publication of EP0118739A2 publication Critical patent/EP0118739A2/en
Publication of EP0118739A3 publication Critical patent/EP0118739A3/en
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Publication of EP0118739B1 publication Critical patent/EP0118739B1/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
    • B21D7/00—Bending rods, profiles, or tubes
    • B21D7/02—Bending rods, profiles, or tubes over a stationary forming member; by use of a swinging forming member or abutment
    • B21D7/022—Bending rods, profiles, or tubes over a stationary forming member; by use of a swinging forming member or abutment over a stationary forming member only

Definitions

  • the invention relates to a pipe bending system.
  • Certain tube bending operations have particular problems. This relates in particular to the case where tubes with a rectangular profile or C profile are present in large length dimensions, which are to be bent with great accuracy into predetermined shapes deviating from arcs. This is particularly the case when roof racks for. Buses, railway wagons, etc. are to be brought into a mirror-symmetrical, parabolic configuration in order to then be welded to vertical supports.
  • a device in which the workpiece is passed together with a template through a hammer mill, in which numerous impacts are made on the tube, so that it is gradually cold forged into the desired shape.
  • the object of the present invention is to create a low-noise pipe bending system for pipes with rectangular or C cross-section and U-cross-section, which can also be operated safely by inexperienced persons.
  • the tube is stationary during the bending process, which is preferably carried out by means of hydraulic working cylinders and is therefore low in noise.
  • the adjustable template ensures that despite different material qualities, e.g. due to tolerances of the pipe wall thickness, changing elasticity modules etc. the required accuracy can be maintained. Since the bending process begins in the middle of the pipe, where the greatest bending radii are generally present, and then continues towards the ends, the paths traveled at the free pipe ends are relatively small, so that the risk of accidents is also low.
  • the base plate 1o On a support (not shown), the base plate 1o is arranged horizontally at a height that it can be conveniently loaded with the pipes to be bent.
  • the auxiliary units, in particular the hydraulic pump (s), are accommodated below the base plate in the support; Above the base plate there is a template against which the workpiece is bent by means of forces acting essentially perpendicular to the longitudinal axis of the tube.
  • the template comprises a molded part 12 made of a material and in dimensions which are selected such that the molded part 12 is elastically deformable within relatively wide limits.
  • base parts 16 are in one, in the top of the base plate recessed groove 18 inserted and fixed by means of cylinder head screws 2o.
  • threaded bolts extend through through holes 22 of the base parts and into threaded holes 24 of the molded part 12.
  • an adjusting nut 26 is seated on the threaded bolt.
  • the molded part is rigidly connected to the base in question at the point in question.
  • loosen one nut and tighten the other depending on whether the molded part should have a larger or a smaller curvature.
  • the basic shape of the molded part is already pre-bent so that it can be elastically deformed in both directions starting from this basic shape. According to this basic shape, the course of the groove 18, the shape of the base parts 16 and the direction of the through bores 22 are also defined therein.
  • the bending tools act on it; they deform the tube beyond the elastic limit in the direction of the template, care being taken to ensure that the tube cannot buckle or otherwise be deformed in an undesired manner.
  • bores 28 of the base plate 30 of bearing blocks 32 are mounted in bores 28, in each of which a hydraulic working cylinder 34 is accommodated.
  • the piston rod 36 is in each case connected by means of a Kuael joint 38 to a pressure shoe 40 which is screwed at one end to a support band 42 made of an elastically deformable material.
  • the resetting of the shoes 4o into the starting position - shown in FIG. 1 - takes place by means of the helical tension springs 44.
  • the support band preferably made of spring steel, prevents the tube from escaping between adjacent shoes.
  • Fig. 2] lets the structure in recognize individual.
  • the system has a support plate 46 which is penetrated by piston rods 48 of two hydraulic working cylinders 50, which transmit tensile forces to the support plate 46 by means of the nuts 52 when fed with pressure oil.
  • compression coil springs 54 lift the plate upwards.
  • the support plate On the side facing away from the tube, the support plate rests on the base parts 16 - an adjustment to pipes of different heights can be made by means of inserts (not shown) - and in a similar way the support plate is also supported on the molded part 12, from where it passes over the cantilever pipe to be bent.
  • a hydraulic working cylinder 56 which is received in a vertical support plate 58, serves as the bending tool.
  • This support plate 58 is screwed up and down to the arms 6 0 and 62 of a lever arrangement which is pivotable about a bearing 64 of the base plate 1o.
  • a guide piece 63 also extends upward from the lower arm 62 and is supported with a transverse arm in a groove 65 of the base plate.
  • the arms 6 0 , 62 can be pivoted by means of a hydraulic working cylinder 66 in the counterclockwise direction from the initial position shown in FIG. 1 by about 9 0 °; for the other tube end, which is to be bent mirror-symmetrically, the pivoting is of course carried out in the opposite sense.
  • the stroke of the piston 68 assigned to the working cylinder 56 is again transmitted by means of a ball joint 7o to a block 72 to which two pressure shoes 74, 76 are articulated. Since the support plate 58 moves along an arc, but the tube is to be bent in the shape of a parabola, the stroke of the working cylinder 56 must be dimensioned accordingly large so that it bridges the differences.
  • the various working cylinders can be fed from a single pressure medium source or, depending on the power requirement, from pumps of correspondingly different designs. Power is supplied via control valves that can be handbet2011i g bar simple systems, but may be also connected to a sequencer. So that not too much pump power has to be installed, the feed to the working cylinders 34 and 56 takes place sequentially.
  • the working cylinder 34 closest to the plane of symmetry of the system is first extended, whereby the workpiece is clamped.
  • the next outer cylinders 34 are then actuated, and the bending takes place with the large bending radii.
  • the above-mentioned bending mandrel is then introduced from the free pipe ends, after which the working cylinders 56 and 50 are simultaneously fed, and the cylinder 66 is actuated alternately with the latter.
  • the workpiece is deformed with ever shorter bending radii, the angular steps being specifiable by adjusting the stroke of cylinder 66, namely preferably becoming ever smaller with shorter bending radii.
  • the first workpieces of each batch are checked after finishing bending by means of a jig (not shown) and, if necessary, the molded part, as explained above, is adjusted to match the properties of the workpieces concerned.
  • the base plate can be divided in the middle and the two parts, together with the aggregates assigned to them, can be moved apart, the gap remaining in the middle being bridged by an insert plate.
  • the template is then also replaced or supplemented by an insert which can be used. In this way, the system can be adapted to pipes of different overall lengths.
  • the support plate 46 can be designed and arranged such that it moves not only upwards but also to the side of the center of curvature when the tube is released, which facilitates the removal of the tube after bending.
  • pressure shoe 4o is not screwed to the support band 42, but rather is slidably connected in the direction of the pipe extension, a lateral displacement of individual pressure shoes is made possible when setting up the system, which may be necessary or expedient in certain cases. This applies in particular when a two-part base plate is used, as mentioned above.
  • the swiveling arrangement of the hydraulic working cylinders 56 can also only take place via a lower lever arm, as a result of which the system in the area of the pipe receptacle is open at the top, which facilitates the handling of the pipes.
  • the swivel drive of this assembly can be constructed differently, for example in the form of a rack and pinion drive acting on a toothed segment with hydraulic actuation. If, finally, this assembly not only with one but with two in common hydraulic cylinders acting on the tube, the two pressure shoes should be bridged by a support band, similar to the area of large bending radii.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Branch Pipes, Bends, And The Like (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)

Abstract

Die Rohbiegeanlage umfaßt eine auf einer Grundplatte (10) verankerte Schablone (12), vor der das Rohr (14) liegt. Mittels Druckstempeln (40) wird das Rohr (14) an die Schablone (12) angeschmiegt, von der Mitte zu den Rohrenden hin fortschreitend. Vorzugsweise ist die Schablone (12) zum Ausgleich von Toleranzen verstellbar.The raw bending system comprises a template (12) anchored on a base plate (10), in front of which the tube (14) lies. The pipe (14) is pressed against the template (12) by means of pressure stamps (40), proceeding from the center towards the pipe ends. The template (12) is preferably adjustable to compensate for tolerances.

Description

Die Erfindung betrifft eine Rohrbiegeanlage.The invention relates to a pipe bending system.

Bestimmte Biegearbeitsgänge an Rohren weisen besondere Probleme auf. Dies bezieht sich insbesondere auf den Fall, daß Rohre mit Rechteckprofil oder C-Profil in großen Längenabmessungen vorliegen, die mit großer Genauigkeit in vorgegebene, von Kreisbögen abweichende Formen gebogen werden sollen. Dieser Fall liegt insbesondere vor, wenn Dachträger für. Autobusse, Eisenbahnwaggons usw. in spiegelsymmetrisch-parabolische Konfiguration zu bringen sind, um dann mit senkrechten Trägern verschweißt zu werden.Certain tube bending operations have particular problems. This relates in particular to the case where tubes with a rectangular profile or C profile are present in large length dimensions, which are to be bent with great accuracy into predetermined shapes deviating from arcs. This is particularly the case when roof racks for. Buses, railway wagons, etc. are to be brought into a mirror-symmetrical, parabolic configuration in order to then be welded to vertical supports.

Für solche und ähnliche Falle ist eine Vorrichtung bekannt, bei der das Werkstück zusammen mit einer Schablone durch ein Hammerwerk geführt wird, in welchem zahlreiche Schläge auf das Rohr ausgeführt werden, so daß dieses allmählich in die gewünschte Form kaltgeschmiedet wird.For such and similar cases, a device is known in which the workpiece is passed together with a template through a hammer mill, in which numerous impacts are made on the tube, so that it is gradually cold forged into the desired shape.

Diese Vorrichtung erfordert große Geschicklichkeit und ist gleichwohl unfallträchtig, weil Rohre in mehreren Metern Länge frei im Raum zu handhaben sind. Darüberhinaus wird durch das Hammerwerk erheblicher Lärm erzeugt.This device requires great skill and is nevertheless prone to accidents because pipes of several meters in length can be handled freely in the room. In addition, considerable noise is generated by the hammer mill.

Aufgabe der vorliegenden Erfindung ist es, eine auch von ungeübten Personen sicher bedienbare, lärmarme Rohrbiegeanlage für Rohre mit Rechteck- oder C-Querschnitt sowie U-Querschnitt zu schaffen.The object of the present invention is to create a low-noise pipe bending system for pipes with rectangular or C cross-section and U-cross-section, which can also be operated safely by inexperienced persons.

Diese Lösung gemäß der Erfindung ergibt sich aus dem kennzeichnenden Teil des Patentanspruchs 1, während die Unteransprüche zweckmäßige Ausgestaltungen dieser Anlage definieren.This solution according to the invention results from the characterizing part of claim 1, while the subclaims define expedient embodiments of this system.

Demgemäß ist das Rohr während des - vorzugsweise mittels hydraulischer Arbeitszylinder auszuführenden und damitlärmarmen - Biegevorgangs stationär. Durch die einstellbare Schablone ist gewährleistet, daß trotz unterschiedlicher Materialqualitäten, z.B. wegen Toleranzen der Rohrwandstärke, wechselnder Elastizitätsmodule usw. die verlangte Genauigkeit eingehalten werden kann. Indem der Biegevorgang in der Rohrmitte beginnt, wo in aller Regel die größten Biegeradien vorliegen, und dann nach den Enden zu fortgesetzt wird, sind die jeweils an den freien Rohrenden durchlaufenen Wege relativ klein, so daß auch die Unfallgefahr gering ist.Accordingly, the tube is stationary during the bending process, which is preferably carried out by means of hydraulic working cylinders and is therefore low in noise. The adjustable template ensures that despite different material qualities, e.g. due to tolerances of the pipe wall thickness, changing elasticity modules etc. the required accuracy can be maintained. Since the bending process begins in the middle of the pipe, where the greatest bending radii are generally present, and then continues towards the ends, the paths traveled at the free pipe ends are relatively small, so that the risk of accidents is also low.

Ein bevorzugtes Ausführungsbeispiel des Gegenstandes der Erfindung wird nachstehend unter Bezugnahme auf die beigefügten Zeichnungen im einzelnenerläutert.

  • Fig. 1 stellt in Halbdraufsicht eine spiegelsymmetrisch aufgebaute Biegeanlage dar,
  • Fig. 2 zeigt eine Teilschnittdarstellung nach Linie A-A der Fig. 1, und
  • Fig. 3 zeigt einen Teilschnitt nach Linie B-B der Fig. 1.
A preferred embodiment of the subject matter of the invention will be explained in detail below with reference to the accompanying drawings.
  • 1 is a semi-plan view of a mirror-symmetrical bending system,
  • Fig. 2 shows a partial sectional view along line AA of Fig. 1, and
  • FIG. 3 shows a partial section along line BB of FIG. 1.

Auf einem Support (nicht dargestellt) ist die Grundplatte 1o in einer Höhe horizontal angeordnet, daß sie bequem mit den zu biegenden Rohren beschickt werden kann. Unterhalb der Grundplatte sind in dem Support die Hilfsaggregate, insbesondere die Hydraulikpumpe(n), untergebracht; oberhalb der Grundplatte befindet sich eine Schablone, gegen die das Werkstück mittels im wesentlichen senkrecht zu der Rohrlängsachse wirkender Kräfte gebogen wird.On a support (not shown), the base plate 1o is arranged horizontally at a height that it can be conveniently loaded with the pipes to be bent. The auxiliary units, in particular the hydraulic pump (s), are accommodated below the base plate in the support; Above the base plate there is a template against which the workpiece is bent by means of forces acting essentially perpendicular to the longitudinal axis of the tube.

Die Schablone umfaßt ein Formteil 12 aus einem Material und in Abmessungen, die derart gewählt sind, daß das Formteil 12 in relativ weiten Grenzen elastisch deformierbar ist. Da andererseits das Formteil den sehr hohen beim Biegevorgang auftretenden Kräften standhalten muß, ist es auf seiner dem Rohr 14 abgewandten Seite in relativ engen Intervallen starr abgestützt. Zu diesem Zweck sind Sockelteile 16 in eine, in die Oberseite der Grundplatte eingesenkte Nut 18 eingesetzt und mittels Zylinderkopfschrauben 2o festgelegt. Parallel zu der Oberfläche der Grundplatte 1o erstrecken sich Gewindebolzen durch Durchgangslöcher 22 der Sockelteile und in Gewindelöcher 24 des Formteils 12. Beidseits der Mündungen der Durchgangslöcher 22 sitzt je eine Stellmutter 26 auf den Gewindebolzen. Solange beide Muttern fest gegen das betreffende Sockelteil geschraubt sind, ist das Formteil an der betreffenden Stelle starr mit diesem und damit auch mit der Grundplatte verbunden. Zum Korrigieren der Form des Formteils löst man die eine Mutter und zieht die andere stärker an, je nachdem, ob das Formteil eine größere oder eine kleinere Krümmung erhalten soll. - Es versteht sich, daß die Grundform des Formteils bereits vorgebogen ist, so daß es ausgehend von dieser Grundform nach beiden Richtungen elastisch deformiert werden kann. Entsprechend dieser Grundform sind auch der Verlauf der Nut 18, die Form der Sockelteile 16 und die Richtung.der Durchgangsbohrungen 22 in diesen festgelegt.The template comprises a molded part 12 made of a material and in dimensions which are selected such that the molded part 12 is elastically deformable within relatively wide limits. On the other hand, since the molded part has to withstand the very high forces that occur during the bending process, it is rigidly supported on its side facing away from the tube 14 at relatively narrow intervals. For this purpose, base parts 16 are in one, in the top of the base plate recessed groove 18 inserted and fixed by means of cylinder head screws 2o. Parallel to the surface of the base plate 1o, threaded bolts extend through through holes 22 of the base parts and into threaded holes 24 of the molded part 12. On each side of the mouths of the through holes 22, an adjusting nut 26 is seated on the threaded bolt. As long as both nuts are screwed firmly against the base part in question, the molded part is rigidly connected to the base in question at the point in question. To correct the shape of the molded part, loosen one nut and tighten the other, depending on whether the molded part should have a larger or a smaller curvature. - It goes without saying that the basic shape of the molded part is already pre-bent so that it can be elastically deformed in both directions starting from this basic shape. According to this basic shape, the course of the groove 18, the shape of the base parts 16 and the direction of the through bores 22 are also defined therein.

Auf der der Schablone abgewandten Seite des zu biegenden Rohres greifen an diesem die Biegewerkzeuge an; sie deformieren das Rohr über die Elastizitätsgrenze hinaus in Richtung auf die Schablone, wobei dafür Soroe zu tragen ist, daß das Rohr nicht ausknicken oder in anderer Weise in ungewünschter Art deformiert werden kann.On the side of the pipe to be bent facing away from the template, the bending tools act on it; they deform the tube beyond the elastic limit in the direction of the template, care being taken to ensure that the tube cannot buckle or otherwise be deformed in an undesired manner.

Im Bereich großer Biegeradien - links in Fig. 1 - sind in Bohrungen 28 der Grundplatte Drehzapfen 3o von Lagerböcken 32 gelagert, in denen je ein Hvdraulik-Arbeitszvlinder 34 aufgenommen ist. Die Kolbenstanae 36 istieweils mittels Kuaelgelenk 38 mit einem Druckschuh 4o verbunden, der an jeweils einem Ende mit einem Stützband 42 aus elastisch deformierbarem Material verschraubt ist. Die Rückstellung der Schuhe 4o in die Ausgangsposition - in Fig. 1 gezeichnet - erfolgt mittels der Schraubenzugfedern 44. Das Stützband, vorzugsweise aus Federstahl, verhindert ein Ausweichen des Rohres zwischen benachbarten Schuhen. Fig. 2]äßt den Aufbau im einzelnen erkennen.In the area of large bending radii - on the left in FIG. 1 - bores 28 of the base plate 30 of bearing blocks 32 are mounted in bores 28, in each of which a hydraulic working cylinder 34 is accommodated. The piston rod 36 is in each case connected by means of a Kuael joint 38 to a pressure shoe 40 which is screwed at one end to a support band 42 made of an elastically deformable material. The resetting of the shoes 4o into the starting position - shown in FIG. 1 - takes place by means of the helical tension springs 44. The support band, preferably made of spring steel, prevents the tube from escaping between adjacent shoes. Fig. 2] lets the structure in recognize individual.

Im Bereich kleinerer Biegeradien (rechts in Fig. 1) ist es erforderlich, das Rohr zumindest von oben abzustützen, wobei auch eine innere Abstützung des Rohres erforderlich sein kann. Hierzu bedient man sich zweckmäßigerweise eines Gliederkerns, wie er in der DE-PS 3o oo17o beschrieben und dargestellt ist. Für die Abstützung in Vertikalrichtung weist die Anlage eine Stützplatte 46 auf, die von Kolbenstangen 48 zweier Hydraulik-Arbeitszylinder 5o durchsetzt sind, welche bei Anspeisung mit Drucköl Zugkräfte mittels der Muttern 52 auf die Stützplatte 46 übertragen. Bei Entlastung der Zylinder 5o heben Druckschraubenfedern 54 die Platte nach oben. Auf der dem Rohr abgewandten Seiteliegt die Stützplatte auf den Sockelteilen 16 auf - wobei durch Beilagen (nicht dargestellt) eine Anpassung an unterschiedlich hohe Rohre vorgenommen werden kann - und in ähnlicher Weise ist die Stützplatte auch auf dem Formteil 12 abgestüzt, von wo sie über das zu biegende Rohr auskragt.In the area of smaller bending radii (on the right in FIG. 1) it is necessary to support the tube at least from above, and an internal support of the tube may also be required. For this purpose, it is expedient to use a sectional core as described and shown in DE-PS 3o oo17o. For support in the vertical direction, the system has a support plate 46 which is penetrated by piston rods 48 of two hydraulic working cylinders 50, which transmit tensile forces to the support plate 46 by means of the nuts 52 when fed with pressure oil. When the cylinders 5o are relieved, compression coil springs 54 lift the plate upwards. On the side facing away from the tube, the support plate rests on the base parts 16 - an adjustment to pipes of different heights can be made by means of inserts (not shown) - and in a similar way the support plate is also supported on the molded part 12, from where it passes over the cantilever pipe to be bent.

Als Biegewerkzeug dient ein Hydraulik-Arbeitszylinder 56, der in einer vertikalen Supportplatte 58 aufgenommen ist. Diese Supportplatte 58 ist oben und unten mit den Armen 60 bzw. 62 einer Hebelanordnung verschraubt, welche um ein Lager 64 der Grundplatte 1o schwenkbar ist. Vom unteren Arm 62 erstreckt sich noch ein Führungsstück 63 nach oben, das mit einem Querarm in einer Nut 65 der Grundplatte abgestützt ist. Die Arme 60, 62 sind mittels eines Hydraulik-Arbeitszylinders 66 aus der in Fig. 1 dargestellten Ausgangslage im Gegenuhrzeigersinn um etwa 90° schwenkbar; für das andere Rohrende, das spiegelsymmetrisch zu biegen ist, erfolgt die Schwenkung natürlich im entgegengesetzten Sinne.A hydraulic working cylinder 56, which is received in a vertical support plate 58, serves as the bending tool. This support plate 58 is screwed up and down to the arms 6 0 and 62 of a lever arrangement which is pivotable about a bearing 64 of the base plate 1o. A guide piece 63 also extends upward from the lower arm 62 and is supported with a transverse arm in a groove 65 of the base plate. The arms 6 0 , 62 can be pivoted by means of a hydraulic working cylinder 66 in the counterclockwise direction from the initial position shown in FIG. 1 by about 9 0 °; for the other tube end, which is to be bent mirror-symmetrically, the pivoting is of course carried out in the opposite sense.

Der Hub des dem Arbeitszylinder 56 zugeordneten Kolbens 68 wird wieder mittels Kugelgelenk 7o auf einen Block 72 übertragen, an den zwei Druckschuhe 74, 76 angelenkt sind. Da sich die Supportplatte 58 längs eines Kreisbogens bewegt, das Rohr aber etwa in Form einer Parabel gebogen werden soll, muß der Hub des Arbeitszylinders 56 entsprechend groß bemessen werden, daß er die Differenzen überbrückt.The stroke of the piston 68 assigned to the working cylinder 56 is again transmitted by means of a ball joint 7o to a block 72 to which two pressure shoes 74, 76 are articulated. Since the support plate 58 moves along an arc, but the tube is to be bent in the shape of a parabola, the stroke of the working cylinder 56 must be dimensioned accordingly large so that it bridges the differences.

Auf der anderen, in Fig. 1 nicht dargestellten Seite der Biegeanlage ist diese spiegelsymmetrisch zu der gezeichneten Anordnung ausgebildet.On the other side of the bending system, which is not shown in FIG. 1, it is mirror-symmetrical to the arrangement shown.

Die verschiedenen Arbeitszylinder können aus einer einzigen Druckmediumquelle gespeist werden oder auch, je nach Leistungsbedarf, von entsprechend unterschiedlich ausgelegten Pumpen. Die Speisung erfolgt über Steuerventile, die bei einfachen Anlagen handbetätigbar sein können, aber auch an eine Folgesteuerung angeschlossen sein können. Damit nicht zu viel Pumpenleistung installiert werden muß, erfolgt die Anspeisung bei Arbeitszylinder 34 und 56 jedenfalls sequentiell.The various working cylinders can be fed from a single pressure medium source or, depending on the power requirement, from pumps of correspondingly different designs. Power is supplied via control valves that can be handbetäti g bar simple systems, but may be also connected to a sequencer. So that not too much pump power has to be installed, the feed to the working cylinders 34 and 56 takes place sequentially.

Dabei geht man vorzugsweiseso vor, daß nach Einlegen eines Werkstücks zunächst die der Symmetrieebene der Anlage nächstliegende Arbeitszylinder 34 ausgefahren werden, womit das Werkstück festgeklemmt wird. Danach werden die nächst- äußeren Zylinder 34 angesteuert, und die Biegung mit den großen Biegeradien erfolgt. Es wird dann der oben erwähnte Biegedorn von den freien Rohrenden her eingeführt, danach werden gleichzeitig die Arbeitszylinder 56 und 5o angespeist, und alternierend mit den letzteren wird der Zylinder 66 angesteuert. So wird das Werkstück mit immer kürzeren Biegeradien verformt, wobei die Winkelschritte durch Einstellung des Hubes von Zylinder 66 vorgebbar sind, nämlich vorzugsweise immer kleiner mit kürzer werdenden Biegeradien.It is preferred to proceed so that after inserting a workpiece the working cylinder 34 closest to the plane of symmetry of the system is first extended, whereby the workpiece is clamped. The next outer cylinders 34 are then actuated, and the bending takes place with the large bending radii. The above-mentioned bending mandrel is then introduced from the free pipe ends, after which the working cylinders 56 and 50 are simultaneously fed, and the cylinder 66 is actuated alternately with the latter. In this way, the workpiece is deformed with ever shorter bending radii, the angular steps being specifiable by adjusting the stroke of cylinder 66, namely preferably becoming ever smaller with shorter bending radii.

Nach Erreichen der Endstellung - gestrichelt in Fig. 1 angedeutet - werden alle Druckschuhe zurückgezogen, und das gebogene Rohr kann unter der dann gelüfteten Stützplatte 46 herausgezogen werden.After reaching the end position - indicated by dashed lines in Fig. 1 - all pressure shoes are withdrawn, and the bent tube can be pulled out under the then released support plate 46.

Die ersten Werkstücke jeder Charge werden nach Fertigbiegen mittels einer Lehre (nicht gezeigt) überprüft, und gegebenenfalls wird das Formteil, wie oben erläutert, in Anpassung an die Eigenschaften der betreffenden Werkstücke nachgestellt.The first workpieces of each batch are checked after finishing bending by means of a jig (not shown) and, if necessary, the molded part, as explained above, is adjusted to match the properties of the workpieces concerned.

Verschiedene Abwandlungen können an der beschriebenen Anlage vorgenommen werden, um deren Einsatzbereich zu erweitern oder andere Verbesserungen zu erzielen.Various modifications can be made to the described system in order to expand its area of application or to achieve other improvements.

So kann die Grundplatte mittig geteilt und die beiden Teile können, samt den ihnen zugeordneten Aggregaten, voneinander abgerückt werden, wobei der in der Mitte verbleibende Spalt durch eine Einlageplatte überbrückt wird. Es versteht sich, daß dann auch die Schablone ausgetauscht oder durch ein einsetzbares Zwischenstück ergänzt wird. Auf diese Weise ist die Anlage an Rohre unterschiedlicher Gesamtlänge anpaßbar.Thus, the base plate can be divided in the middle and the two parts, together with the aggregates assigned to them, can be moved apart, the gap remaining in the middle being bridged by an insert plate. It goes without saying that the template is then also replaced or supplemented by an insert which can be used. In this way, the system can be adapted to pipes of different overall lengths.

Ferner kann die Stützplatte 46 so ausgebildet und angeordnet werden, daß sie sich bei der Freigabe des Rohres nicht nur nach oben, sondern auch zur Seite des Krümmungsmittelpunktes wegbewegt, was die Entnahme des Rohres nach dem Biegen erleichtert.Furthermore, the support plate 46 can be designed and arranged such that it moves not only upwards but also to the side of the center of curvature when the tube is released, which facilitates the removal of the tube after bending.

Wenn der Druckschuh 4o mit dem Stützband42 nicht verschraubt,sondern in Richtung der Rohrerstreckung gleitbeweglich verbunden ist, wird eine seitliche Versetzung einzelner Druckschuhe beim Rüsten der Anlage ermöglicht, was in bestimmten Fällen notwendig oder zweckmäßig sein kann. Dies gilt insbesondere dann, wenn eine zweiteilige Grundplatte verwendet wird, wie oben erwähnt.If the pressure shoe 4o is not screwed to the support band 42, but rather is slidably connected in the direction of the pipe extension, a lateral displacement of individual pressure shoes is made possible when setting up the system, which may be necessary or expedient in certain cases. This applies in particular when a two-part base plate is used, as mentioned above.

Schließlich kann auch die schwenkbewegliche Anordnung der Hydraulik-Arbeitszylinder 56 nur über einen unteren Hebelarm erfolgen, wodurch die Anlage im Bereich der Rohraufnahme nach oben offen ist, was die Handhabung der Rohre erleichtert. Allerdings müssen dann die erheblichen Biegemomente in konstruktiv anderer Weise abgefangen werden, um die Deformationen der Arbeitszylinder, die sonst zu einem vorschnellen Verschleiß führen würden, zu vermeiden. - Auch der Schwenkantrieb dieser Baugruppe kann anders aufgebaut sein, etwa in From eines auf ein Zahnsegment wirkenden Zahnstangentriebes mit hydraulischer Betätigung. Wenn schließlich diese Baugruppe nicht nur mit einem, sondern mit zwei gemeinsam auf das Rohr einwirkenden Hydraulikzylindern bestückt wird, sollten die beiden Druckschuhe ähnlich wie im Bereich großer Biegeradien durch ein Stützband überbrückt werden.Finally, the swiveling arrangement of the hydraulic working cylinders 56 can also only take place via a lower lever arm, as a result of which the system in the area of the pipe receptacle is open at the top, which facilitates the handling of the pipes. However, the considerable bending moments must then be absorbed in a different way in order to avoid the deformations of the working cylinders, which would otherwise lead to premature wear. - The swivel drive of this assembly can be constructed differently, for example in the form of a rack and pinion drive acting on a toothed segment with hydraulic actuation. If, finally, this assembly not only with one but with two in common hydraulic cylinders acting on the tube, the two pressure shoes should be bridged by a support band, similar to the area of large bending radii.

Claims (16)

1. Rohrbiegeanlage, gekennzeichnet durch die Kombination der folgenden Merkmale: (a) das in einer Ebene zu biegende Rohr (14) ist auf einer Grundplatte (10) vor einer Schablone (12), die in der Grundplatte verankert ist, liegend angeordnet, (b) auf der der Schablone abgewandten Seite des Rohres sind horizontalwirkende Arbeitszylinder (34, 56) vorgesehen, die zum Anschmiegen des Rohres an die Schablone alternierend mit Druckmedium beaufschlagbar sind, (c) die Ansteuerung der Arbeitszylinder erfolgt zuerst in der Mitte des Rohres und schreitet dann in Richtung der Rohrenden fort. 1. Pipe bending system, characterized by the combination of the following features: (a) the pipe (14) to be bent in one plane is arranged lying on a base plate ( 10 ) in front of a template (12) which is anchored in the base plate, (b) on the side of the tube facing away from the template, horizontally acting working cylinders (34, 56) are provided, which can alternately be pressurized with pressure medium to fit the tube onto the template, (c) the actuation of the working cylinders takes place first in the middle of the pipe and then proceeds in the direction of the pipe ends. 2. Rohrbiegeanlage nach Anspruch 1, dadurch gekennzeichnet, daß die Schablone (12) korrigierbar ist.2. Pipe bending system according to claim 1, characterized in that the template (12) can be corrected. 3. Rohrbiegeanlage nach Anspruch 2, dadurch gekennzeichnet, daß die Schablone ein bandförmiges, elastisch deformierbares Formstück (12) sowie an einer Sockelanordnung (16) festlegbare Verstellorgane (21, 26) umfaßt.3. Pipe bending system according to claim 2, characterized in that the template comprises a band-shaped, elastically deformable shaped piece (12) and on a base arrangement (16) fixable adjusting members (21, 26). 4. Rohrbiegeanlage nach Anspruch 3, dadurch gekennzeichnet, daß die Verstellorgane (21, 26) Einstellgewinde aufweisen.4. Pipe bending system according to claim 3, characterized in that the adjusting members (21, 26) have adjustment threads. 5. Rohrbiegeanlage nach Ansprüchen 3 oder 4, dadurch gekennzeichnet, daß die Sockelanordnung (116) in einer Nut (18) der Grundplatte (1o) abgestützt ist.5. Pipe bending system according to claims 3 or 4, characterized in that the base arrangement (116) in a groove (18) of the base plate (1o) is supported. 6. Rohrbiegeanlage nach Anspruch 1 bis 5, dadurch gekennzeichnet, daß stationäre Arbeitszylinder (34) vorgesehen sind.6. Pipe bending system according to claim 1 to 5, characterized in that stationary working cylinders (34) are provided. 7. Rohrbiegeanlage nach Anspruch 6, dadurch gekennzeichnet, daß die stationären Arbeitszylinder (34) im Bereich relativ großer Biegeradien vorgesehen sind und Druckschuhe (4o) umfassen, die mit den Druckschuhen benachbarter stationärer Arbeitszylinder durch ein elastisch deformierbares Band (42) verbunden sind, das längs des Rohres verläuft.7. Pipe bending system according to claim 6, characterized in that the stationary working cylinder (34) in the area relatively large bending radii are provided and comprise pressure shoes (4o) which are connected to the pressure shoes of adjacent stationary working cylinders by an elastically deformable band (42) which runs along the tube. 8. Rohrbiegeanlage nach Anspruch 1, 6 oder 7, dadurch gekennzeichnet, daß mindestens ein längs des Rohres verfahrbarer Arbeitszylinder (56) vorgesehen ist.8. Pipe bending system according to claim 1, 6 or 7, characterized in that at least one working cylinder (56) movable along the tube is provided. 9. Rohrbiegeanlage nach Anspruch 8, dadurch gekennzeichnet, daß alle verfahrbaren Arbeitszylinder (56) auf je einem Schwenkarm (60 + 62) angeordnet sind.9. Pipe bending system according to claim 8, characterized in that all movable working cylinders (56) are each arranged on a swivel arm (6 0 + 62). 10. Rohrbiegeanlage nach Anspruch 9, dadurch gekennzeichnet, daß der Schwenkarm (60 + 62) in einer Horizontalebene um ein, vom Arbeitszylinder (56) aus jenseits der Schablone (12) liegendes Lager (64) schwenkbar ist.1 0 . Pipe bending system according to claim 9, characterized in that the swivel arm (6 0 + 62) can be swiveled in a horizontal plane about a bearing (64) lying beyond the template (12) from the working cylinder (56). 11. Rohrbiegeanlage nach Anspruch 1 bis 10, gekennzeichnet durch oberhalb des Rohres (14) vorgesehene Anschläge (46) zum Verhindern eines Ausknickens des Rohres beim Biegen.11. Pipe bending system according to claim 1 to 1 0 , characterized by stops (46) provided above the tube (14) to prevent the tube from buckling during bending. 12. Rohrbiegeanlage nach Anspruch 1o und/oder 11, dadurch gekennzeichnet, daß Arbeitszylinder(66, 50) für die Betätigung des Schwenkarms (60 + 62) und/oder der Anschläge (46) vorgesehen sind.12. Pipe bending system according to claim 1o and / or 11, characterized in that working cylinders (66, 5 0 ) for the actuation of the swivel arm (6 0 + 62) and / or the stops (46) are provided. 13. Rohrbiegeanlage nach Anspruch 1o und 12, dadurch gekennzeichnet, daß der Schwenkarm (60 + 62) um einstellbare Winkelschritte schwenkbar ist.13. Pipe bending system according to claim 1o and 12, characterized in that the swivel arm (6 0 + 62) is pivotable about adjustable angular steps. 14. Rohrbiegeanlage nach Anspruch 13, dadurch gekennzeichnet, daß kleineren Biegeradien kleinere Winkelschritte zugeordnet sind.14. Pipe bending system according to claim 13, characterized in that smaller bending radii are assigned smaller angular steps. 15. Rohrbiegeanlage nach Anspruch 12, dadurch gekennzeichnet, daß die den Schwenkarm (60 + 62) und die die Anschläge (46) betätigenden Arbeitszylinder (66, 50) alternierend mit jenen Arbeitszylindern (34, 56) druckbeaufschlagbar sind, die das Rohr an die Schablone anschmiegen.15. Pipe bending system according to claim 12, characterized in that the pivot arm (6 0 + 62) and the stops (46) actuating working cylinder (66, 5 0 ) alternately with those working cylinders (34, 56) which can be pressurized, which the tube nestle against the template. 16. Rohrbiegeanlage nach Anspruch 1 bis 15, dadurch gekennzeichnet, daß die Arbeitszylinder (34, 56) sequentiell ansteuerbar sind.16. Pipe bending system according to claim 1 to 15, characterized in that the working cylinders (34, 56) can be controlled sequentially.
EP84101144A 1983-03-02 1984-02-04 Pipe-bending arrangement Expired EP0118739B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84101144T ATE26547T1 (en) 1983-03-02 1984-02-04 PIPE BENDING MACHINE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3307283 1983-03-02
DE19833307283 DE3307283A1 (en) 1983-03-02 1983-03-02 PIPE BENDING SYSTEM

Publications (3)

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EP0118739A2 true EP0118739A2 (en) 1984-09-19
EP0118739A3 EP0118739A3 (en) 1984-12-19
EP0118739B1 EP0118739B1 (en) 1987-04-15

Family

ID=6192247

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84101144A Expired EP0118739B1 (en) 1983-03-02 1984-02-04 Pipe-bending arrangement

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Country Link
US (1) US4712406A (en)
EP (1) EP0118739B1 (en)
JP (1) JPS59193719A (en)
AT (1) ATE26547T1 (en)
CS (1) CS250239B2 (en)
DE (2) DE3307283A1 (en)
ES (1) ES530615A0 (en)
SU (1) SU1373301A3 (en)

Cited By (1)

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EP0177027A2 (en) * 1984-10-04 1986-04-09 PINICAL YACHTBAU Gesellschaft mbH Apparatus for stretch-bending elongate material

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JPS6296127A (en) * 1985-10-23 1987-05-02 Mazda Motor Corp Ground clearance adjuster for automobile
JPH0158304U (en) * 1987-10-09 1989-04-12
DE3915855A1 (en) * 1989-05-16 1990-11-22 Walter E Spaeth UNIVERSAL BENDING TOOL
US5131254A (en) * 1991-01-29 1992-07-21 Whitefab, Inc Apparatus for bending beams
GB2275219B (en) * 1993-02-20 1995-06-07 Btr Plc Bending of elongate material
DE102008003067B4 (en) 2008-01-03 2013-05-29 Edag Gmbh & Co. Kgaa Method and bending tool for bending a workpiece
CN102581085B (en) * 2012-02-28 2014-05-14 江苏奔宇车身制造有限公司 Integrated bending forming device for abnormally-shaped tube

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US2406182A (en) * 1943-09-11 1946-08-20 Charles S Foreman Bending apparatus
US3472055A (en) * 1966-11-29 1969-10-14 Harry Goble Bending machines for bending metal bars or sections
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0177027A2 (en) * 1984-10-04 1986-04-09 PINICAL YACHTBAU Gesellschaft mbH Apparatus for stretch-bending elongate material
EP0177027A3 (en) * 1984-10-04 1987-09-30 PINICAL YACHTBAU Gesellschaft mbH Apparatus for stretch-bending elongate material

Also Published As

Publication number Publication date
ES8501262A1 (en) 1984-11-16
JPS59193719A (en) 1984-11-02
DE3307283A1 (en) 1984-09-06
JPS6110212B2 (en) 1986-03-28
DE3463121D1 (en) 1987-05-21
EP0118739B1 (en) 1987-04-15
ES530615A0 (en) 1984-11-16
ATE26547T1 (en) 1987-05-15
CS250239B2 (en) 1987-04-16
SU1373301A3 (en) 1988-02-07
US4712406A (en) 1987-12-15
EP0118739A3 (en) 1984-12-19

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