EP0076783B1 - Machine for bending tubes and sectional bars - Google Patents

Machine for bending tubes and sectional bars Download PDF

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Publication number
EP0076783B1
EP0076783B1 EP82810406A EP82810406A EP0076783B1 EP 0076783 B1 EP0076783 B1 EP 0076783B1 EP 82810406 A EP82810406 A EP 82810406A EP 82810406 A EP82810406 A EP 82810406A EP 0076783 B1 EP0076783 B1 EP 0076783B1
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EP
European Patent Office
Prior art keywords
bending
clamping jaw
die
support
plate
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Expired
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EP82810406A
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German (de)
French (fr)
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EP0076783A1 (en
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Fritz Fischer
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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
    • B21D37/00—Tools as parts of machines covered by this subclass
    • B21D37/14—Particular arrangements for handling and holding in place complete dies
    • 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
    • B21D7/024—Bending rods, profiles, or tubes over a stationary forming member; by use of a swinging forming member or abutment by a swinging forming member

Definitions

  • the invention relates to a bending machine according to the preamble of claim 1 or Z.
  • the tool change - especially when it comes to relatively large pipe diameters or large bending radii - is relatively cumbersome and time-consuming, because usually the bending shape and jaw on the Machine frame or bending head are screwed tight.
  • a separate bending shape is required for each bending pipe diameter and bending radius, which results in large tool investments.
  • the object of the invention is to achieve a bending machine, in particular for pipes, in which the tool change takes place significantly faster and is also greatly simplified and in which the tool costs can also be significantly reduced.
  • the bending machine designed as a tube bending machine contains, according to FIG. 1, a bending head 1 lying on the floor. This carries a sliding rail 9 movable in the longitudinal direction of the tube with a contact surface adapted to the tube diameter for receiving the tube 5 to be bent 1a of the bending head 1 and can be pivoted by a motor drive about a vertical bending axis.
  • the support 32 sits on a slide and can be set at a desired distance by means of toothed catches 34 by means of a clamping bracket 30.
  • the carriage is hydraulically fed to clamp the tube 5.
  • the clamping jaw 26 has a recess 27 with a radius which corresponds to the pipe 5 to be bent.
  • the bending die 7 is also provided with an approximately semicircular recess corresponding to the pipe 5 to be bent and has an insert 20 in the pipe clamping section - that is to say in the straight section in front of the bending radius - which also contains a semi-cylindrical recess.
  • An insert 20 of this type is expedient if bends are to be produced in a tube on the floor, which in different levels. After the formation of a first sheet, the entire bending die 7 no longer has to be replaced, but the replacement of the insert 20 is sufficient.
  • the bending die 7 is precisely but smoothly inserted over a cylindrical bending axis 4. This bending axis 4 is non-positively connected to the pivotable bending table 3 and can be exchanged for those with different diameters.
  • the bending axis 4 can be pivoted together with the bending table 3 about its own vertical axis if a corresponding pipe bend is to be carried out.
  • an adapter plate 16 is placed at the bottom, which has a slot 18, which is intended to interact with a driver 24 which is held in the bending table 3 so as to be adjustable in height. If the adapter plate 16 rests on the top of the bending table 3 and this driver 24 engages in its slot 18, this causes a non-positive pivot connection between the bending table 3 and the adapter plate 16 together with the bending die 7 seated thereon.
  • the adapter plate 16 can, however, without screws or. To be solved are lifted off.
  • At least one further driver in the form of at least one vertical bolt 17, which brings about a non-positive connection between these two parts.
  • These bolts 17 and the associated bores in the counterpart have tolerances such that the bending die 7 can be easily lifted upwards in order to enable the bending die 7 to be separated from the adapter plate 16.
  • a mandrel 14 for receiving the pipe 5 to be bent from the front.
  • an elongated slide rail 9 which is also provided with a semicircular recess adapted to the pipe diameter.
  • This wedge 19 is designed as a square wedge, sits firmly in the bending die 7 and has a sliding fit in the insert 20.
  • the uppermost part of this wedge 19 penetrates a plate 40 which serves to regulate the height and preferably has a circular cross section in this area.
  • a vertical groove or dovetail connection could also be provided between the insert 20 and the bending die 7.
  • the plate 40 is rigidly connected to the insert 20 by means of screws 23 and extends over the parting line between the insert 20 and the bending die 7. On the part of this plate 40 projecting beyond the bending die 7 there is a regulating screw 25 with which the exact height of the insert 20 can be adjusted when used for the first time. It is thus possible to lift the insert 20 upwards by hand and to replace it with another insert if, for example, a previously attached, close pipe bend requires a special shape of this insert 20. This insert 20 is replaced without loosening screws or the like.
  • the jaws 26 are also easily and quickly exchangeable. There is also a wedge 44 extending in the vertical direction between this clamping jaw 26 and the intermediate piece 28.
  • a plate 36 is rigidly connected to the clamping jaw 26 by screws and extends over the joint between the clamping jaw 26 and the intermediate piece 28, the height position being able to be adjusted by a regulating screw 29 when it is used for the first time.
  • the jaw 26 can be lifted up by hand without screws and can be replaced by a jaw of a different design.
  • the intermediate piece 28 is rigidly connected in an analogous manner to the support 32, a plate 38 likewise being present, which is rigidly fastened to the intermediate piece by screws 41.
  • the center of the clamping jaw 26 is gradually offset from the center of the intermediate piece 28 against the bending axis 4; Furthermore, the center of the intermediate piece 28 is also offset from the center of the support 32, as a result of which a short clamping or clamping range of the pipe 5 to be bent can be achieved and bends which are close to one another can thereby be produced.
  • the clamping jaw 26 can also be connected directly to the support 32, avoiding the intermediate piece 28, in the same way as has already been described, so that the clamping jaw 26 can also be lifted upwards.
  • both the bending die 7 and the clamping jaw 26 - depending on the weight - can be lifted up by hand or by means of a crane or by only lifting the insert 20 also upwards and replacing it with another one becomes. If the intermediate piece 28 is dispensable, this can also be lifted up slightly.
  • At least one further, smaller adapter plate can be placed on the adapter plate 16, onto which one can be then the actual bending die 7 can be put on.
  • Bending dies 7 for large pipe diameters can be placed directly on the bending table 3 without an adapter plate 16.
  • the vertically movable driver 24 then engages directly in a recess, corresponding to the recess 18, of the bending die. Since there is no screw fastening between the bending die 7 and the bending table 3, the bending die 7 can be replaced by simply lifting it upwards.
  • such bending machines can also be used for bending profile rails or solid-walled bars.

Abstract

1. Bending Machine for pipes and sectional bars, with a bending table (3) able to tilt about a stationary bending head (1), in which case a bending tool with a bending die (7) and clamping jaw (26) able to tilt about a vertical bending shaft (4) are arranged on the bending table (3) and support members (2) for the workpiece to be supported are connected to the bending head (1), the bending die (7) is fitted on the bending shaft (4), means are provided for transmitting the tilting force between the bending table (3) and the bending die (7) and the clamping jaw (26) intended ro bear against the workpiece (5) with a support (32) supported on the bending table (3) is restrained by way of at least one intermediate member (28) by form-locking connecting members (22, 44) which are constructed so that the clamping jaw (26) can be raised in the upwards direction, characterised in that the intermediate member (28) can also be raised in the upwards direction, that a plate (36, 38) projecting beyond the respective plane of separation between the clamping jaw (26) and intermediate member (28) or support (32) is attached both to the clamping jaw (26) as well as to the intermediate member (28), which Plate supports a setscrew (29, 42) for vertical adjustment of the clamping jaw (26) and that the bending die (7) is attached to an adaptor plate (16) able to be removed in the upwards direction, seated loosely on the bending shaft (4) and bearing against the bending table (3), which adaptor plate (16) co-operates with a vertically adjustable entrainment member (24) seated in the tilting bending table (3).

Description

Die Erfindung bezieht sich auf eine Biegemaschine nach dem Oberbegriff des Patentanspruches 1 bzw. Z. Bei bekannten Rohrbiegemaschinen ist der Werkzeugwechsel - namentlich wenn es sich um relativ grosse Rohrdurchmesser oder grosse Biegeradien handelt - relativ umständlich und zeitraubend, weil üblicherweise die Biegeform und Klemmbacke auf dem Maschinengestell oder Biegekopf festgeschraubt sind. Für jeden biegenden Rohrdurchmesser und Biegeradius ist eine eigene Biegeform erforderlich, wodurch sich grosse Werkzeuginvestitionen ergeben. Wenn auf einer Biegemaschine die für relativ grosse Rohrdurchmesser konzipiert ist, Rohre mit relativ kleinem Rohrdurchmesser zu biegen sind, erfordert dies trotzdem hohe und damit schwere, einstückige Biegematrizen und Klemmbacken, da sich die Bauhöhe der Biegematrizen nach der Lage der Längsachse des grössten zu verformenden Rohres des betreffenden Maschinentypes richtet. Wenn zudem nach einer ersten Biegung eines Rohres in geringem Abstand eine zweite Biegung in unterschiedlicher Ebene des Rohres herzustellen ist, bedingt dies eine weitere, unterschiedlich ausgebildete Biegematrize zur Aufnahme des bereits angeformten Rohrbogens.The invention relates to a bending machine according to the preamble of claim 1 or Z. In known pipe bending machines, the tool change - especially when it comes to relatively large pipe diameters or large bending radii - is relatively cumbersome and time-consuming, because usually the bending shape and jaw on the Machine frame or bending head are screwed tight. A separate bending shape is required for each bending pipe diameter and bending radius, which results in large tool investments. If, on a bending machine that is designed for relatively large pipe diameters, pipes with a relatively small pipe diameter are to be bent, this still requires high and therefore heavy, one-piece bending dies and clamping jaws, since the height of the bending dies depends on the position of the longitudinal axis of the largest pipe to be deformed of the machine type concerned. If, after a first bend of a pipe at a small distance, a second bend is to be made in a different plane of the pipe, this requires a further, differently designed bending die for receiving the pipe bend which has already been formed.

Aus der US-A 4 178 788, die die Merkunde des Oberbegriffs des Ansprüchs 1 bzw. Z. Zeigt, bekannt, bei welcher eine Klemmbacke durch eine T-Nutverbindung an einem Support festgehalten ist. Dieser Support lässt sich hydraulisch in Längsrichtung des ungebogenen Rohres verstellen, jedoch nicht in der Höhe einstellen und genau auf die Achse der Biegematrize einregulieren, da unten eine Auflageplatte vorhanden ist. Anderseits wird die Biegematrize von einer vertikalen Achse aufgenommen und ist auf dem Maschinenrahmen befestigt, jedoch lösbar. Für ein in den geradlinigen Teil dieser Biegematrize eingesetztes Einsatzstück sind keine Mittel vorhanden, um dieses schnell auswechselbar zu machen, wenn nahe beieinander liegende Rohrbogen allenfalls in unterschiedlichen Ebenen angeformt werden sollen. Ein blosses Abheben der Biegematrize nach oben - ohne Lösen von Schrauben od. dgl. - zum schnellen Werkzeugwechsel und ein präzises Einstellen auf die Rohrmittelachse ist somit nicht möglich. Wenn zudem die Maschine zum Biegen relativ grosser Rohre konzipiert ist, ist das Biegen vergleichsweise kleiner Rohre aus Gründen der Werkzeugkosten unwirtschaftlich, da sich die Höhe der herzustellenden Biegematrize nach der Lage der für grosse Rohre gegebenen Rohrmittelachse zu richten hat.Known from US-A 4 178 788, which shows the features of the preamble of claim 1 or Z, in which a clamping jaw is held on a support by a T-slot connection. This support can be adjusted hydraulically in the longitudinal direction of the unbent tube, but cannot be adjusted in height and adjusted precisely to the axis of the bending die, since a support plate is provided at the bottom. On the other hand, the bending die is taken up by a vertical axis and is attached to the machine frame, but can be detached. No means are available for an insert piece inserted into the straight-line part of this bending die in order to make it quickly interchangeable if pipe bends which are close to one another are to be formed on different planes at best. Simply lifting the bending die upwards - without loosening screws or the like - for quick tool change and precise adjustment to the pipe center axis is therefore not possible. If the machine is also designed to bend relatively large pipes, the bending of comparatively small pipes is uneconomical because of the tool costs, since the height of the bending die to be produced has to be based on the position of the pipe center axis given for large pipes.

Mit der Erfindung soll die Aufgabe gelöst werden, eine Biegemaschine, insbesondere für Rohre zu schaffen, bei welcher der Werkzeugwechsel bedeutend schneller erfolgt und zudem stark vereinfacht wird und bei der sich zudem die Werkzeugkosten wesentlich vermindern lassen.The object of the invention is to achieve a bending machine, in particular for pipes, in which the tool change takes place significantly faster and is also greatly simplified and in which the tool costs can also be significantly reduced.

Diese Aufgabe wird durch die im Kennzeichen des Patentanspruches 1 bzw. Z. genannten Merkmale gelöst.This object is achieved by the features mentioned in the characterizing part of patent claim 1 or Z.

Dadurch ist es möglich, Werkzeuge, welche für den Biegevorgang erforderlich sind, in einem Bruchteil der bisher benötigten Zeit zu wechseln, da sie schraubenlos einfach nach oben abgehoben werden können. Grundlage hiefür ist die Erkenntnis, dass bei solchen Biegevorgängen praktisch keine Kräfte in Vertikalrichtung wirksam werden. Zudem sind die Werkzeugkosten wesentlich geringer und die Werkzeuge lassen sich auf Biegemaschinen unterschiedlicher Typen-Grössen einsetzen. Bei Maschinen, die für grosse Rohrdurchmesser konzipiert sind, können mit vergleichsweise geringem Werkzeugaufwand auch Rohre mit relativ kleinem Durchmesser gebogen werden oder aber Werkzeuge, die für kleinere Maschinen gebaut wurden, lassen sich auch auf grossen Maschinen einsetzen.This makes it possible to change tools that are required for the bending process in a fraction of the time previously required, since they can be easily lifted up without screws. The basis for this is the knowledge that practically no forces act in the vertical direction in such bending processes. In addition, the tool costs are significantly lower and the tools can be used on bending machines of different types. In machines that are designed for large pipe diameters, pipes with a relatively small diameter can be bent with comparatively little tool effort, or tools that were built for smaller machines can also be used on large machines.

In der Zeichnung ist ein Ausführungsbeispiel des Erfindungsgegenstandes dargestellt. Es zeigen :

  • Figur 1 eine perspektivische Ansicht einer Rohrbiegemaschine
  • Figur 2 eine perspektivische Ansicht des Biegetisches mit Biegewerkzeug
  • Figur 3 einen Vertikalschnitt durch eine Biegematrize
  • Figur4 eine Draufsicht auf die Klemmbacke und deren Befestigungsorgane.
In the drawing, an embodiment of the subject of the invention is shown. Show it :
  • Figure 1 is a perspective view of a pipe bending machine
  • Figure 2 is a perspective view of the bending table with bending tool
  • 3 shows a vertical section through a bending die
  • Figure4 is a plan view of the jaw and its fasteners.

Die als Rohrbiegemaschine ausgebildete Biegemaschine enthält gemäss Fig. 1 einen auf dem Boden aufliegenden Biegekopf 1. Dieser trägt eine in Rohrlängsrichtung bewegliche Gleitschiene 9 mit einer dem Rohrdurchmesser angepassten Anlagefläche zur Aufnahme des zu biegenden Rohres 5. Ein Biegetisch 3 greift gabelförmig in einen etwa halbkreisförmigen Ansatz 1a des Biegekopfes 1 ein und ist durch Motorantrieb um eine vertikale Biegeachse schwenkbar. Auf dem schwenkbaren Biegetisch 3 sitzt eine Klemmbacke 26, welche mit Hilfe eines Klemmwinkels 30, eines Supportes 32 und eines Zwischenstückes 28 festgehalten ist. Der Support 32 sitzt auf einem Schlitten und lässt sich über Klemmwinkel 30 durch Zahnrasten 34 in einem gewünschten Abstand einstellen. Zum Klemmen des Rohres 5 wird der Schlitten hydraulisch zugestellt. Die Klemmbacke 26 weist eine Ausnehmung 27 mit einem Radius auf, welcher dem zu biegenden Rohr 5 entspricht.The bending machine designed as a tube bending machine contains, according to FIG. 1, a bending head 1 lying on the floor. This carries a sliding rail 9 movable in the longitudinal direction of the tube with a contact surface adapted to the tube diameter for receiving the tube 5 to be bent 1a of the bending head 1 and can be pivoted by a motor drive about a vertical bending axis. On the pivotable bending table 3 there is a clamping jaw 26, which is held in place with the aid of a clamping angle 30, a support 32 and an intermediate piece 28. The support 32 sits on a slide and can be set at a desired distance by means of toothed catches 34 by means of a clamping bracket 30. The carriage is hydraulically fed to clamp the tube 5. The clamping jaw 26 has a recess 27 with a radius which corresponds to the pipe 5 to be bent.

Die Biegematrize 7 ist ebenfalls mit einer dem zu biegenden Rohr 5 entsprechenden etwa halbkreisförmigen Ausnehmung versehen und weist bei der Rohrklemmpartie - also im geraden Teilstück vor dem Biegeradius - ein Einsatzstück 20 auf, das ebenfalls eine halbzylindrische Ausnehmung enthält. Ein derartiges Einsatzstück 20 ist dann zweckmässig, wenn in einem Rohr Bogen an Boden erzeugt werden sollen, die in unterschiedlichen Ebenen liegen. Nach Bildung eines ersten Bogens muss nicht mehr die ganze Biegematrize 7 ausgewechselt werden, sondern das Auswechseln des Einsatzstückes 20 genügt. Die Biegematrize 7 ist präzis aber leichtgängig über eine zylindrische Biegeachse 4 gesteckt. Diese Biegeachse 4 ist kraftschlüssig mit dem schwenkbaren Biegetisch 3 verbunden und lässt sich gegen solche mit anderen Durchmessern austauschen. Die Biegeachse 4 ist zusammen mit dem Biegetisch 3 um ihre eigene vertikale Achse verschwenkbar, wenn eine entsprechende Rohrbiegung durchzuführen ist. Auf die Biegeachse 4 ist unten eine Adapterplatte 16 aufgesetzt, die einen Schlitz 18 aufweist, welcher mit einem im Biegetisch 3 höhenverstellbar gehaltenen Mitnehmer 24 zum Zusammenwirken bestimmt ist. Wenn die Adapterplatte 16 auf der Oberseite des Biegetisches 3 aufliegt und dieser Mitnehmer 24 in ihren Schlitz 18 eingreift, bewirkt dies eine kraftschlüssige Schwenkverbindung zwischen dem Biegetisch 3 und der Adapterplatte 16 samt der auf dieser sitzenden Biegematrize 7. Die Adapterplatte 16 kann indessen ohne dass Schrauben od. dgl. zu lösen sind nach oben abgehoben werden. Zwischen der Adapterplatte 16 und der Biegematrize 7 befindet sich mindestens ein weiterer Mitnehmer in Form mindestens eines vertikalen Bolzens 17, welcher eine kraftschlüssige Verbindung zwischen diesen beiden Teilen bewirkt. Diese Bolzen 17 und die zugeordneten Bohrungen im Gegenstück haben solche Toleranzen, dass ein leichtgängiges Abheben der Biegematrize 7 nach oben möglich ist, um eine Trennung der Biegematrize 7 von der Adapterplatte 16 zu ermöglichen. Zur Aufnahme des zu biegenden Rohres 5 von vorne befindet sich ein Dorn 14. Seitlich daneben ist eine längliche Gleitschiene 9 vorhanden, die ebenfalls mit einer dem Rohrdurchmesser angepassten, halbrunden Ausnehmung versehen ist.The bending die 7 is also provided with an approximately semicircular recess corresponding to the pipe 5 to be bent and has an insert 20 in the pipe clamping section - that is to say in the straight section in front of the bending radius - which also contains a semi-cylindrical recess. An insert 20 of this type is expedient if bends are to be produced in a tube on the floor, which in different levels. After the formation of a first sheet, the entire bending die 7 no longer has to be replaced, but the replacement of the insert 20 is sufficient. The bending die 7 is precisely but smoothly inserted over a cylindrical bending axis 4. This bending axis 4 is non-positively connected to the pivotable bending table 3 and can be exchanged for those with different diameters. The bending axis 4 can be pivoted together with the bending table 3 about its own vertical axis if a corresponding pipe bend is to be carried out. On the bending axis 4, an adapter plate 16 is placed at the bottom, which has a slot 18, which is intended to interact with a driver 24 which is held in the bending table 3 so as to be adjustable in height. If the adapter plate 16 rests on the top of the bending table 3 and this driver 24 engages in its slot 18, this causes a non-positive pivot connection between the bending table 3 and the adapter plate 16 together with the bending die 7 seated thereon. The adapter plate 16 can, however, without screws or. To be solved are lifted off. Between the adapter plate 16 and the bending die 7 there is at least one further driver in the form of at least one vertical bolt 17, which brings about a non-positive connection between these two parts. These bolts 17 and the associated bores in the counterpart have tolerances such that the bending die 7 can be easily lifted upwards in order to enable the bending die 7 to be separated from the adapter plate 16. There is a mandrel 14 for receiving the pipe 5 to be bent from the front. On the side next to it there is an elongated slide rail 9 which is also provided with a semicircular recess adapted to the pipe diameter.

Zwischen dem Rücken des Einsatzstützes 20 und der Biegematrize 7 ist ein Keil 19 vorhanden, welcher sich in Vertikalrichtung erstreckt, und sich teilweise in einer Vertikalnut des Einsatzstückes 20 und teilweise in die Biegematrize 7 erstreckt und dadurch die beiden Teile in der richtigen Relativlage festhält. Dieser Keil 19 ist als Vierkantkeil ausgebildet, sitzt fest in der Biegematrize 7 und weist im Einsatzstück 20 einen Schiebesitz auf. Der oberste Teil dieses Keiles 19 durchdringt eine der Höhenregulierung dienende Platte 40 und hat in diesem Bereich vorzugsweise einen kreisförmigen Querschnitt. An Stelle einer Keilverbindung könnte auch eine vertikale Nut-oder Schwalbenschwanzverbindung zwischen dem Einsatzstück 20 und der Biegematrize 7 vorgesehen werden.Between the back of the insert support 20 and the bending die 7 there is a wedge 19 which extends in the vertical direction and which extends partly in a vertical groove of the insert 20 and partly in the bending die 7 and thereby holds the two parts in the correct relative position. This wedge 19 is designed as a square wedge, sits firmly in the bending die 7 and has a sliding fit in the insert 20. The uppermost part of this wedge 19 penetrates a plate 40 which serves to regulate the height and preferably has a circular cross section in this area. Instead of a wedge connection, a vertical groove or dovetail connection could also be provided between the insert 20 and the bending die 7.

Die Platte 40 ist mit Schrauben 23 mit dem Einsatzstück 20 starr verbunden und erstreckt sich über die Trennfuge zwischen Einsatzstück 20 und Biegematrize 7. An dem die Biegematrize 7 überragenden Teil dieser Platte 40 ist eine Regulierschraube 25 vorhanden, mit welcher die genaue Höhenlage des Einsatzstückes 20 beim erstmaligen Einsatz einreguliert werden kann. Somit ist es möglich, das Einsatzstück 20 von Hand nach oben abzuheben und durch ein anderes Einsatzstück auszuwechseln, wenn beispielsweise ein zuvor angebrachter, naher Rohrbogen eine spezielle Formgebung dieses Einsatzstückes 20 verlangt. Das Auswechseln dieses Einsatzstückes 20 erfolgt, ohne dass Schrauben od. dgl. zu lösen sind.The plate 40 is rigidly connected to the insert 20 by means of screws 23 and extends over the parting line between the insert 20 and the bending die 7. On the part of this plate 40 projecting beyond the bending die 7 there is a regulating screw 25 with which the exact height of the insert 20 can be adjusted when used for the first time. It is thus possible to lift the insert 20 upwards by hand and to replace it with another insert if, for example, a previously attached, close pipe bend requires a special shape of this insert 20. This insert 20 is replaced without loosening screws or the like.

Auch die Klemmbacken 26 sind leicht und rasch auswechselbar. Hier ist ebenfalls ein sich in Vertikalrichtung erstreckender Keil 44 zwischen dieser Klemmbacke 26 und dem Zwischenstück 28 vorhanden. Eine Platte 36 ist mit der Klemmbacke 26 durch Schrauben starr verbunden und erstreckt sich über die Trennfuge zwischen Klemmbacke 26 und Zwischenstück 28, wobei mittels einer Regulierschraube 29 beim erstmaligen Einsatz die Höhenlage eingestellt werden kann. Somit kann auch die Klemmbacke 26 von Hand schraubenlos nach oben abgehoben werden und lässt sich durch eine Klemmbacke anderer Ausbildung ersetzen. Das Zwischenstück 28 ist in analoger Weise mit dem Support 32 starr verbunden, wobei ebenfalls eine Platte 38 vorhanden ist, die mit Schrauben 41 mit dem Zwischenstück starr befestigt ist. Hier ist ebenfalls eine Regulierschraube 42 vorhanden, so dass sich das Zwischenstück 28 in der Höhe relativ zum Support 32 beim erstmaligen Einsatz einstellen lässt. Sowohl zwischen der Klemmbacke 26 und dem Zwischenstück 28 als auch zwischen dem Support 32 und dem Zwischenstück 38 befindet sich je ein in eine Nut eingreifender Vorsprung oder Vertikalkeil 22, 44 oder eine Schwalbenschwanzverbindung.The jaws 26 are also easily and quickly exchangeable. There is also a wedge 44 extending in the vertical direction between this clamping jaw 26 and the intermediate piece 28. A plate 36 is rigidly connected to the clamping jaw 26 by screws and extends over the joint between the clamping jaw 26 and the intermediate piece 28, the height position being able to be adjusted by a regulating screw 29 when it is used for the first time. Thus, the jaw 26 can be lifted up by hand without screws and can be replaced by a jaw of a different design. The intermediate piece 28 is rigidly connected in an analogous manner to the support 32, a plate 38 likewise being present, which is rigidly fastened to the intermediate piece by screws 41. There is also a regulating screw 42 here, so that the height of the intermediate piece 28 can be adjusted relative to the support 32 when it is used for the first time. Between the clamping jaw 26 and the intermediate piece 28 as well as between the support 32 and the intermediate piece 38 there is a projection or vertical wedge 22, 44 engaging in a groove or a dovetail connection.

Wie aus Fig. 4 ersichtlich ist, liegt die Mitte der Klemmbacke 26 gegenüber der Mitte des Zwischenstückes 28 stufenweise gegen die Biegeachse 4 hin versetzt ; ferner ist die Mitte des Zwischenstückes 28 gegenüber der Mitte des Supportes 32 ebenfalls versetzt angeordnet, wodurch ein kurzer Klemm- oder Spannbereich des zu biegenden Rohres 5 erreicht werden kann und sich dadurch nahe beieinander liegende Biegungen herstellen lassen. Bei grossen Werkzeugen kann die Klemmbacke 26 unter Vermeidung des Zwischenstückes 28 auch direkt mit dem Support 32 in gleicher Weise, wie dies bereits beschrieben wurde, verbunden werden, sodass die Klemmbacke 26 ebenfalls nach oben abgehoben werden kann.As can be seen from FIG. 4, the center of the clamping jaw 26 is gradually offset from the center of the intermediate piece 28 against the bending axis 4; Furthermore, the center of the intermediate piece 28 is also offset from the center of the support 32, as a result of which a short clamping or clamping range of the pipe 5 to be bent can be achieved and bends which are close to one another can thereby be produced. In the case of large tools, the clamping jaw 26 can also be connected directly to the support 32, avoiding the intermediate piece 28, in the same way as has already been described, so that the clamping jaw 26 can also be lifted upwards.

Somit kann ein Schnellwechsel des Werkzeuges stattfinden, indem sowohl die Biegematrize 7 als auch die Klemmbacke 26 - je nach Gewicht - von Hand oder mittels eines Kranes nach oben abgehoben werden kann oder aber indem nur das Einsatzstück 20 ebenfalls nach oben abgehoben und durch ein anderes ersetzt wird. Falls das Zwischenstück 28 entbehrlich ist, kann auch dieses leicht nach oben abgehoben werden.Thus, a quick change of the tool can take place in that both the bending die 7 and the clamping jaw 26 - depending on the weight - can be lifted up by hand or by means of a crane or by only lifting the insert 20 also upwards and replacing it with another one becomes. If the intermediate piece 28 is dispensable, this can also be lifted up slightly.

Falls besonders durchmesserkleine Rohre gebogen werden sollen, kann auf die Adapterplatte 16 auch mindestens eine weitere, kleinere Adapterplatte aufgesetzt werden, auf welche sich dann die eigentliche Biegematrize 7 aufsetzen lässt.If particularly small diameter pipes are to be bent, at least one further, smaller adapter plate can be placed on the adapter plate 16, onto which one can be then the actual bending die 7 can be put on.

Biegematrizen 7 für grosse Rohrdurchmesser können unter Verzicht auf eine Adapterplatte 16 direkt auf den Biegetisch 3 aufgesetzt werden. Der höhenbewegliche Mitnehmer 24 greift dann unmittelbar in eine Ausnehmung -entsprechend der Ausnehmung 18 - der Biegematrize ein. Da auf eine Schraubenbefestigung zwischen Biegematrize 7 und Biegetisch 3 verzichtet wird, kann das Auswechseln der Biegematrize 7 durch blosses Abheben nach oben erfolgen.Bending dies 7 for large pipe diameters can be placed directly on the bending table 3 without an adapter plate 16. The vertically movable driver 24 then engages directly in a recess, corresponding to the recess 18, of the bending die. Since there is no screw fastening between the bending die 7 and the bending table 3, the bending die 7 can be replaced by simply lifting it upwards.

Ausser dem bevorzugten Biegen von Rohren können derartige Biegemaschinen auch zum Biegen von Profilschienen oder vollwandigen Stäben eingesetzt werden.In addition to the preferred bending of pipes, such bending machines can also be used for bending profile rails or solid-walled bars.

Claims (4)

1. Bending Machine for pipes and sectional bars, with a bending table (3) able to tilt about a stationary bending head (1), in which case a bending tool with a bending die (7) and clamping jaw (26) able to tilt about a vertical bending shaft (4) are arranged on the bending table (3) and support members (2) for the workpiece to be supported are connected to the bending head (1), the bending die (7) is fitted on the bending shaft (4), means are provided for transmitting the tilting force between the bending table (3) and the bending die (7) and the clamping jaw (26) intended ro bear against the workpiece (5) with a support (32) supported on the bending table (3) is restrained by way of at least one intermediate member (28) by form-locking connecting members (22, 44) which are constructed so that the clamping jaw (26) can be raised in the upwards direction, characterised in that the intermediate member (28) can also be raised in the upwards direction, that a plate (36, 38) projecting beyond the respective plane of separation between the clamping jaw (26) and intermediate member (28) or support (32) is attached both to the clamping jaw (26) as well as to the intermediate member (28), which Plate supports a setscrew (29, 42) for vertical adjustment of the clamping jaw (26) and that the bending die (7) is attached to an adaptor plate (16) able to be removed in the upwards direction, seated loosely on the bending shaft (4) and bearing against the bending table (3), which adaptor plate (16) co-operates with a vertically adjustable entrainment member (24) seated in the tilting bending table (3).
2. Bending machine for pipes and sectional bars, with a bending table (3) able to tilt about a stationary bending head (1), in which case a bending tool with a bending die (7) and clamping jaw (26) able to tilt about a vertical bending shaft (4) are arranged on the bending table (3) and support members (2) for the workpiece to be supported are connected to the bending head (1), the bending die (7) is fitted on the bending shaft (4), means are provided for transmitting the tilting force between the bending table (3) and bending die (7) and the clamping jaw (26) intended to lie against the workpiece (5) with a support (32) supported on the bending table (3) is restrained by form-locking connecting members (44), which are constructed so that the clamping jaw (26) can be raised in the upwards direction, characterised in that attached to the clamping jaw (26) is a plate (36, 38) projecting beyond the plane of separation between the clamping jaw (26) and support (32), which plate supports the setscrew (29) for the vertical adjustment of the clamping jaw (26) and that the bending die (7) is attached to an adaptor plate (16) which can be removed in the upwards direction, is seated loosely on the bending shaft (4) and bears against the bending table (3), which adaptor plate co-operates with a vertically adjustable entrainment member (24) seated in the tilting bending table (3).
3. Bending die according to Claim 1 or 2, in which in its workpiece clamping part the bending die (7) contains an insert (20), characterised in that the insert (20) is constructed as an insert member (20) able to be raised in the upwards direction and held by vertical bolts (17) engaging in the adaptor plate (16), in which case a plate (40) projecting beyond the plane of separation between the bending die (7) and the insert member (20) is attached to the insert member (20), which supports a setscrew (25) for the vertical adjustment of the insert member (20).
4. Bending machine according to Claim 1 or 2, characterised in that the centre of the clamping jaw (26) is staggered stepwise with respect to the centre of the intermediate member (28) and the centre of the intermediate member (28) is staggered stepwise with respect to the centre of the support (32). (Figure 4).
EP82810406A 1981-10-01 1982-09-29 Machine for bending tubes and sectional bars Expired EP0076783B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82810406T ATE12463T1 (en) 1981-10-01 1982-09-29 BENDING MACHINE FOR PIPES AND PROFILE RAILS.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH632481 1981-10-01
CH6324/81 1981-10-01

Publications (2)

Publication Number Publication Date
EP0076783A1 EP0076783A1 (en) 1983-04-13
EP0076783B1 true EP0076783B1 (en) 1985-04-03

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ID=4307762

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Application Number Title Priority Date Filing Date
EP82810406A Expired EP0076783B1 (en) 1981-10-01 1982-09-29 Machine for bending tubes and sectional bars

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EP (1) EP0076783B1 (en)
AT (1) ATE12463T1 (en)
DE (1) DE3262891D1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012005092B3 (en) * 2012-03-12 2013-06-27 Wafios Aktiengesellschaft Fastening arrangement for replaceably fastening clamping jaw at e.g. adapter for bending head of bending pipe, has locking element movable in holder, where detent intervention of element is reversible with engagement portion of mold part
CN104874653A (en) * 2015-05-07 2015-09-02 浙江利帆家具有限公司 Positioning mechanism of circular pipe bending device

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1278066B1 (en) * 1995-05-12 1997-11-17 Cml Costr Mecc Liri Srl LOCKING AND TOWING UNIT OF A TUBE OR PROFILE FOR CURVATUBE MACHINES WITH OR WITHOUT INTERNAL CORE AND BENDERS, AND MACHINES FOR THE
WO1998000250A1 (en) * 1996-07-01 1998-01-08 Tools For Bending, Inc. Quick change tooling method and apparatus
DE102005012551B4 (en) * 2005-03-18 2008-06-12 Tracto-Technik Gmbh Changing device for a bending machine system and a bending machine system and a method for converting a bending machine
CN103658397A (en) * 2013-12-04 2014-03-26 中山市鑫海精密制造科技有限公司 U-shaped hardware machining method

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL102760C (en) * 1957-02-06
US4009601A (en) * 1975-01-24 1977-03-01 K.K. Shimizu Seisakusho Method of and apparatus for bending a double pipe
US4078411A (en) * 1976-11-15 1978-03-14 Eaton-Leonard Corporation Floating clamp die
US4083216A (en) * 1977-05-16 1978-04-11 Caterpillar Tractor Co. Support pin for clamping die assembly
DE2746721C3 (en) * 1977-10-18 1981-03-19 Schwarze, Rigobert, Dipl.-Ing., 5000 Köln Tube bending machine
US4178788A (en) * 1978-03-24 1979-12-18 Eaton-Leonard Corporation Adjustable clamp die

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012005092B3 (en) * 2012-03-12 2013-06-27 Wafios Aktiengesellschaft Fastening arrangement for replaceably fastening clamping jaw at e.g. adapter for bending head of bending pipe, has locking element movable in holder, where detent intervention of element is reversible with engagement portion of mold part
CN104874653A (en) * 2015-05-07 2015-09-02 浙江利帆家具有限公司 Positioning mechanism of circular pipe bending device

Also Published As

Publication number Publication date
DE3262891D1 (en) 1985-05-09
EP0076783A1 (en) 1983-04-13
ATE12463T1 (en) 1985-04-15

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