EP2475474B1 - Bending machine for bending elongated workpieces, in particular tubes and profiles - Google Patents

Bending machine for bending elongated workpieces, in particular tubes and profiles Download PDF

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Publication number
EP2475474B1
EP2475474B1 EP10760910.9A EP10760910A EP2475474B1 EP 2475474 B1 EP2475474 B1 EP 2475474B1 EP 10760910 A EP10760910 A EP 10760910A EP 2475474 B1 EP2475474 B1 EP 2475474B1
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EP
European Patent Office
Prior art keywords
bending
machine according
workpiece
carriage
bending machine
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP10760910.9A
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German (de)
French (fr)
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EP2475474A2 (en
Inventor
Thomas Steffen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Daetwyler Global Tec Holding AG
Original Assignee
Mewag Maschinenfabrik AG
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Priority to PL10760910T priority Critical patent/PL2475474T3/en
Publication of EP2475474A2 publication Critical patent/EP2475474A2/en
Application granted granted Critical
Publication of EP2475474B1 publication Critical patent/EP2475474B1/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
    • B21D7/024—Bending rods, profiles, or tubes over a stationary forming member; by use of a swinging forming member or abutment by a swinging forming member
    • 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
    • B21D9/00—Bending tubes using mandrels or the like
    • B21D9/05—Bending tubes using mandrels or the like co-operating with forming members
    • B21D9/07—Bending tubes using mandrels or the like co-operating with forming members with one or more swinging forming members engaging tube ends only
    • 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
    • B21D9/00—Bending tubes using mandrels or the like
    • B21D9/05—Bending tubes using mandrels or the like co-operating with forming members
    • B21D9/07—Bending tubes using mandrels or the like co-operating with forming members with one or more swinging forming members engaging tube ends only
    • B21D9/073—Bending tubes using mandrels or the like co-operating with forming members with one or more swinging forming members engaging tube ends only with one swinging forming member

Definitions

  • the invention relates to a bending machine for bending elongate workpieces, in particular pipes or profiles, with a machine frame, with this guided longitudinally displaceable feed device and Dorngurzugs worn, with a bending device with at least one bending tool, wherein the feed device receiving the at least one workpiece Chuck is assigned.
  • the object of the present invention was to improve a bending machine of the type mentioned above in such a way that it eliminates the above drawbacks and also optimizes the operability with respect to exchanging the collets and mandrel bars and increases the stability during bending of the workpieces ,
  • the object is achieved according to the Auspruch 1 according to the invention.
  • the bending machine is characterized in that the feed device with the collet and the Dorn Wegzugs engaged are guided longitudinally displaceable laterally on the machine frame, so that the feeding of the feed device with the at least one workpiece as well as the operation of Dorn Dornzugs responded can be done easily and user-friendly.
  • the work can be carried out especially on workpieces with a larger cross section to approximately half the height of the person.
  • the tool components to be used such as collets, Dornstangen and others, also quickly and easily delivered.
  • Fig.1 1 shows a bending machine 10 which serves to bend one or more workpieces 11 and which essentially comprises a machine frame 20 and a bending device 60 flange-mounted on the end face thereof.
  • a feed device 30 and a mandrel retraction device 40 are guided longitudinally displaceable.
  • the workpiece 11 is clamped and it is automatically brought by this in the corresponding bending position. It may also be included in this feed device 30, an unspecified pipe rotating device through which a pipe to be bent by predetermined angle can be rotated.
  • a mandrel 42 is inserted into the interior of the particular intended as a pipe workpiece 11, wherein the mandrel 42 has on its front side approximately corresponding to the inner cross section of the workpiece to be bent articulated, not shown head, by means of the bending of the workpiece in in a known manner prevents the latter is not changed in the bent portion in the mold.
  • both the feed device 30 and the mandrel retraction device 40 are guided longitudinally displaceable laterally on the machine frame.
  • the advancing 30 and Dornschzugs Rhein 40 extending in approximately vertical longitudinal extent are slidably guided in the horizontal direction on the lower and the upper side of a respective common guideway 22, each with a rack 24.
  • the machine stand 20 is composed of several juxtaposed modules 10 'together and consists essentially of a cross-sectionally C-shaped longitudinal stand 12 with the guideways 22, a cabin frame 15 surrounding this longitudinal stand 12 with several longitudinally arranged preferably made of transparent material sliding doors 16.
  • a cross-sectionally C-shaped longitudinal stand 12 with the guideways 22, a cabin frame 15 surrounding this longitudinal stand 12 with several longitudinally arranged preferably made of transparent material sliding doors 16.
  • the machine stand 20 the front side still a final wall 14, opposite a connecting frame 15 and 21 feet assigned.
  • electrical cabinets 17, machine control units or the like are placed on the back of the machine stand 20.
  • the machine stand 20 is designed in such a way that the bending device 60 can be mounted on the front side of the machine stand on the left or right as required.
  • the end wall 14 or these connection frame 15 would then be arranged vice versa.
  • the bending device 60 are assigned a plurality of superimposed on an axis 66 bending tools 65, which are present disc-shaped.
  • This axis 66 is vertical, that is aligned perpendicular to the feed direction of the respective workpiece 11.
  • a known per se pivotable clamping arm 70 is provided with a plurality of clamping jaws 64. These jaws 64 are arranged adjustable in the clamping arm 70 and are at a high pressure against the Workpiece 11 and the bending tool 65 is pressed.
  • a bending drive 68 pivoting the clamping arm 70 about this axis 66, the workpiece is bent around the outer periphery of the bending tool 65 dimensionally accurate.
  • the feed device 30 as a multi-part frame 30 'with a through hole 34 for the mandrel 42 slidably formed and has for this purpose on the top and bottom each guide 22', which slide in the guideways 22 on the machine stand 20.
  • these guides 22 ' are each driven by a separate drive 36 gears 24', which are in engagement with a respective rack 24 at the machine stand or longitudinal stand 12.
  • Fig. 3 this up and down on the guides 22 of the longitudinal stand 12 adjustable feed device 30 on the front side a collet 50 with or without twisting device for the workpiece.
  • This collet 50 which is not illustrated in detail, is mounted in a height-adjustable manner, so that the workpiece to be bent can be adapted to the height position of the bending tool in the bending device 60.
  • FIG. 4 and FIG. 5 show the Dorn Wegzugs worn 40, which comprises a multi-part frame 40 'and is formed sled-shaped and as the feed device 30 on the top and bottom each have a guide 22', which in the guideways 22 on the machine stand 20 slide.
  • these guides 22 'height-adjustable toothed segments 44 are contained in the frame 40', through which the device 40 with the machine stand 20 can be locked. This results in a very stable secure positioning of the insertable into the workpiece mandrel 42, which is 45 clamped in a height-adjustable slide.
  • An actively connected to the carriage 45 and rotatable by a drive 48 spindle 47 allows the height adjustment of the carriage 45 and thus accurate positioning of the mandrel 42 relative to the workpiece 11 and the bending tool.
  • the clamping arm 70 is box-shaped and a one or more jaws 64 receiving carriage 75 is guided on both sides adjustable in this clamping arm 70.
  • This carriage 75 is expediently vertically aligned in its longitudinal extent and held longitudinally adjustable in guides 72 of the box-shaped clamping arm 70 at the top and bottom.
  • Fig. 6 are the box-forming side walls 71 on the clamping arm 70, as these in Fig. 1 are visible, omitted so that the carriage 75 is visible.
  • the carriage 75 and with it the clamping jaws 64 by a drive means 77 prepositioned or coarse and additionally adjustable by a separate Verspann affection 80 so that the clamping jaws 64 during bending against the workpiece with a predetermined clamping force can be pressed.
  • the carriage 75 is adjustable by a spindle 79 rotatable by the drive device 77.
  • This bending tools centering axis 66 is mounted at both ends of a respective flange 73, 74 on the box-shaped clamping arm 70. With the schematically indicated bending drive 68 below the Axis 66, then the clamping arm 70 can be pivoted about the axis 66.
  • This tensioning device 80 separated from the drive device 77 is distinguished by a further preferred feature, namely that this is realized by a wedge gear 80.
  • This wedge gear 80 includes a first wedge 81 displacing the carriage 75 and a second wedge 82 cooperating therewith.
  • the first wedge 81 is hinged to a frame 70 'of the tensioning arm 70, and this spindle 79 rotatably connected to the carriage 75 is in turn at the first Wedge 81 held.
  • the second wedge 82 is movable transversely to the direction of movement of the carriage 75 by a drive (not shown) in the clamping arm and is supported on the one hand on the first wedge 81 and on the other hand on the vertical part 70 "of the frame 70. When this second wedge 82 is adjusted, the first wedge becomes 81 and with it the carriage 75 in the horizontal direction against the axis 66 moves towards.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)

Description

Die Erfindung bezieht sich auf eine Biegemaschine zum Biegen von länglichen Werkstücken, insbesondere von Rohren bzw. Profilen, mit einem Maschinenständer, mit an diesem längsverschiebbar geführten Vorschubeinrichtung und Dornrückzugseinrichtung, mit einer Biegevorrichtung mit wenigstens einem Biegewerkzeug, wobei der Vorschubeinrichtung eine das wenigstens eine Werkstück aufnehmende Spannzange zugeordnet ist.The invention relates to a bending machine for bending elongate workpieces, in particular pipes or profiles, with a machine frame, with this guided longitudinally displaceable feed device and Dornrückzugseinrichtung, with a bending device with at least one bending tool, wherein the feed device receiving the at least one workpiece Chuck is assigned.

Bei Biegemaschinen nach der eingangs erwähnten Gattung ( EP-A-1 380 363 ) werden die zu bearbeitenden Werkstücke nur in axialer Richtung bewegt und die Höheneinsteliung der Biegewerkzeuge am Biegekopf erfolgt durch vertikale bzw. horizontale Bewegung. Bei Rohren bzw. Profilen mit grösserem Querschnitt ist nachteilig, dass die Belade- bzw. Entladehöhe nach oben verändert wird, weil sich die Vorschubeinrichtung bzw. die Dornrückzugseinrichtung auf der Oberseite des Maschinenständers befindet. Grössere Rohre bzw. Profile, die nicht nur axial, sondern auch vertikal und horizontal bewegt werden müssen, werden zusätzliche Stabilisierungselemente benötigt, oder aber die Stabilität insbesondere bei mehrstufigen Werkzeugen ist nicht mehr ausreichend gegeben.In bending machines according to the type mentioned ( EP-A-1 380 363 ), the workpieces to be machined are moved only in the axial direction and the Höheneinsteliung the bending tools on the bending head by vertical or horizontal movement. In the case of pipes or profiles with a larger cross section, it is disadvantageous that the loading or unloading height is changed upwards because the feed device or the mandrel retraction device is located on the upper side of the machine stand. Larger pipes or profiles that need to be moved not only axially, but also vertically and horizontally, additional stabilizing elements are needed, or else the stability is no longer sufficient, especially in multi-stage tools.

Der vorliegenden Erfindung wurde demgegenüber die Aufgabe zugrundegelegt, eine Biegemaschine nach der eingangs erwähnten Gattung derart zu verbessern, dass mit ihr die obigen Nachteile beseitigt und die Bedienbarkeit auch hinsichtlich eines Auswechselns der Spannzangen und Dornstangen optimiert und die Stabilität beim Biegen der Werkstü - ke erhöht wird.On the other hand, the object of the present invention was to improve a bending machine of the type mentioned above in such a way that it eliminates the above drawbacks and also optimizes the operability with respect to exchanging the collets and mandrel bars and increases the stability during bending of the workpieces ,

Die Aufgabe ist erfindungsgemäss nach dem Auspruch 1 gelöst.The object is achieved according to the Auspruch 1 according to the invention.

Die Biegemaschine zeichnet sich dadurch aus, dass die Vorschubeinrichtung mit der Spannzange als auch die Dornrückzugseinrichtung seitlich am Maschinenständer längsverschiebbar geführt sind, so dass die Beschickung der Vorschubeinrichtung mit dem wenigstens einen Werkstück als auch die Bedienbarkeit der Dornrückzugseinrichtung einfach und bedienerfreundlich erfolgen kann. Damit können die Arbeiten vor allem auch bei Werkstücken mit grösserem Querschnitt auf annähernd der halben Personenhöhe durchgeführt werden. Darüberhinaus können die einzusetzenden Werkzeugkomponenten, wie zum Beispiel Spannzangen, Dornstangen und weiteres, ebenfalls schnell und einfach zugestellt werden.The bending machine is characterized in that the feed device with the collet and the Dornrückzugseinrichtung are guided longitudinally displaceable laterally on the machine frame, so that the feeding of the feed device with the at least one workpiece as well as the operation of Dorn Dornzugseinrichtung can be done easily and user-friendly. Thus, the work can be carried out especially on workpieces with a larger cross section to approximately half the height of the person. In addition, the tool components to be used, such as collets, Dornstangen and others, also quickly and easily delivered.

Durch die kastenförmige Ausbildung des Spannarmes und eines in diesem beidseitig geführten Schlittens mit der wenigstens einen Spannbake ergibt sich eine sehr stabile und steife Ausbildung desselben und damit eine optimale Aufnahme der Gegenkräfte bei dem mit den Spannbacken erfolgenden Biegung des Werkstückes um das Biegewerkzeug.Due to the box-shaped design of the clamping arm and guided in this carriage on both sides with the at least one clamping beacon results in a very stable and rigid training and thus optimum absorption of the opposing forces in the successful with the jaws bending of the workpiece to the bending tool.

Durch das Anstellen der Spannbacke/n an das Werkstück mittels einer ein Keilgetriebe aufweisenden Verspanneinrichtung können sehr hohe definierte Anpresskräfte erzeugt werden. Zudem ist die Spannbacke/n und mit ihr der Schlitten durch eine separate Antriebseinrichtung vorpositionierbar bzw. grob verschiebbar, womit zusätzlich eine optimale Auslegung dieses Spannarmes erzielt wird.By hiring the clamping jaw / s to the workpiece by means of a clamping device having a wedge gear very high defined contact forces can be generated. In addition, the jaw / n and with it the carriage by a separate drive means can be pre-positioned or coarse displaced, which in addition an optimal design of this clamping arm is achieved.

Ein Ausführungsbeispiel der Erfindung sowie weitere Vorteile derselben sind nachfolgend anhand der Zeichnung näher erläutert. Es zeigt:

Fig. 1
eine perspektivische Darstellung der erfindungsgemässen Biegemaschine;
Fig. 2
eine stirnseitige Ansicht einer Vorschubeinrichtung der Biegemaschine nach Fig. 1;
Fig. 3
perspektivisch einen Ausschnitt des Maschinenständers und der darin geführten Vorschubeinrichtung mit einer Spannzange;
Fig. 4
eine Seitenansicht einer Dornrückzugseinrichtung der Biegemaschine nach Fig. 1;
Fig. 5
eine stirnseitige Ansicht der Dornrückzugseinrichtung gemäss Fig. 4; und
Fig. 6
eine perspektivische Seitenansicht des Spannarmes sowie des mit diesem gelenkig verbundenen Achse der Biegemaschine nach Fig. 1.
An embodiment of the invention and further advantages thereof are explained in more detail with reference to the drawing. It shows:
Fig. 1
a perspective view of the inventive bending machine;
Fig. 2
an end view of a feed device of the bending machine according to Fig. 1 ;
Fig. 3
in perspective, a section of the machine stand and guided therein feeding device with a collet chuck;
Fig. 4
a side view of a Dornrückzugseinrichtung the bending machine according to Fig. 1 ;
Fig. 5
an end view of the Dornrückzugseinrichtung according to Fig. 4 ; and
Fig. 6
a perspective side view of the clamping arm and the articulated with this axis of the bending machine according to Fig. 1 ,

Fig.1 zeigt eine zum Biegen von einem oder mehreren Werkstücken 11 dienende Biegemaschine 10, welche sich im Wesentlichen aus einem Maschinenständer 20 und einer stirnseitig an diesem angeflanschten Biegevorrichtung 60 zusammensetzt. Im Maschinenständer 20 sind eine Vorschubeinrichtung 30 und eine Dornrückzugseinrichtung 40 längsverschiebbar geführt. Fig.1 1 shows a bending machine 10 which serves to bend one or more workpieces 11 and which essentially comprises a machine frame 20 and a bending device 60 flange-mounted on the end face thereof. In the machine frame 20, a feed device 30 and a mandrel retraction device 40 are guided longitudinally displaceable.

In der Vorschubeinrichtung 30 ist das Werkstück 11 festgespannt und es wird von dieser automatisch in die entsprechende Biegeposition gebracht. Es kann ausserdem eine nicht näher erläuterte Rohrdrehvorrichtung in dieser Vorschubeinrichtung 30 enthalten sein, durch welche ein zu biegendes Rohr um vorgegebene Winkel verdreht werden kann.In the feed device 30, the workpiece 11 is clamped and it is automatically brought by this in the corresponding bending position. It may also be included in this feed device 30, an unspecified pipe rotating device through which a pipe to be bent by predetermined angle can be rotated.

Mit der Dornrückzugseinrichtung 40 wird ein Dorn 42 ins Innere des insbesondere als Rohr vorgesehenen Werkstückes 11 eingeschoben, wobei der Dorn 42 auf seiner Vorderseite eine annähernd dem Innenquerschnitt des zu biegenden Werkstückes entsprechenden gelenkig zusammengesetzten, nicht gezeigten Kopf aufweist, mittels dem beim Biegen des Werkstückes in an sich bekannter Weise verhindert wird, dass letzteres im gebogenen Bereich in der Form nicht verändert wird.With the mandrel retraction device 40, a mandrel 42 is inserted into the interior of the particular intended as a pipe workpiece 11, wherein the mandrel 42 has on its front side approximately corresponding to the inner cross section of the workpiece to be bent articulated, not shown head, by means of the bending of the workpiece in in a known manner prevents the latter is not changed in the bent portion in the mold.

Erfindungsgemäss sind sowohl die Vorschubeinrichtung 30 als auch die Dornrückzugseinrichtung 40 seitlich am Maschinenständer längsverschiebbar geführt. Die sich in annähernd vertikaler Längsausdehnung erstreckenden Vorschub- 30 und Dornrückzugseinrichtung 40 sind auf deren Unter- und der Oberseite an je einer gemeinsamen Führungsbahn 22 mit je einer Zahnstange 24 in horizontaler Richtung schlittenförmig geführt.According to the invention, both the feed device 30 and the mandrel retraction device 40 are guided longitudinally displaceable laterally on the machine frame. The advancing 30 and Dornrückzugseinrichtung 40 extending in approximately vertical longitudinal extent are slidably guided in the horizontal direction on the lower and the upper side of a respective common guideway 22, each with a rack 24.

Es ist damit - wie bereits erwähnt - die Beschickung der Vorschubeinrichtung 30 mit dem wenigstens einen Werkstück 11 als auch die Bedienbarkeit der Dornrückzugseinrichtung 40 äusserst einfach und bedienerfreundlich ausgestaltet, da durch diese seitliche Anordnung dieser Einrichtungen eine Person die Arbeiten annähernd auf der halben Mannhöhe verrichten kann.It is thus - as already mentioned - the feed of the feed device 30 with the at least one workpiece 11 and the operability the Dornrückzugseinrichtung 40 extremely simple and user-friendly designed, as a person can perform the work approximately at half the height of man by this lateral arrangement of these facilities.

Der Maschinenständer 20 setzt sich aus mehreren aneinandergereihten Modulen 10' zusammen und besteht im Wesentlichen aus einem im Querschnitt C-förmigen Längsständer 12 mit den Führungsbahnen 22, einem diesen Längsständer 12 umgebenden Kabinengehäuse 15 mit mehreren vorzugsweise aus durchsichtigem Material bestehenden längsseitig angeordneten Schiebetüren 16. Damit ist der von dem Hub der Vorschub- bzw. der Dornrückzugseinrichtung und den Führungsbahnen 22 gebildete Raum verschliessbar.The machine stand 20 is composed of several juxtaposed modules 10 'together and consists essentially of a cross-sectionally C-shaped longitudinal stand 12 with the guideways 22, a cabin frame 15 surrounding this longitudinal stand 12 with several longitudinally arranged preferably made of transparent material sliding doors 16. Thus is the space formed by the stroke of the feed or the Dornrückzugseinrichtung and the guideways 22 closed.

Ferner sind dem Maschinenständer 20 stirnseitig noch eine Abschlusswand 14, gegenüberliegend ein Verbindungsrahmen 15 sowie Füsse 21 zugeordnet. Auf der Rückseite des Maschinenständers 20 sind Elektroschränke 17, Maschinensteuerungsaggregate oder dergleichen plaziert.Furthermore, the machine stand 20, the front side still a final wall 14, opposite a connecting frame 15 and 21 feet assigned. On the back of the machine stand 20 electrical cabinets 17, machine control units or the like are placed.

Der Maschinenständer 20 ist derart ausgestaltet, dass die Biegevorrichtung 60 je nach Bedarf links oder rechts an der Stirnseite des Maschinenständers montierbar ist. Die Abschlusswand 14 respektive dieser Verbindungsrahmen 15 wären dann vice versa anzuordnen.The machine stand 20 is designed in such a way that the bending device 60 can be mounted on the front side of the machine stand on the left or right as required. The end wall 14 or these connection frame 15 would then be arranged vice versa.

Der Biegevorrichtung 60 sind mehrere übereinander auf einer Achse 66 angeordnete Biegewerkzeuge 65 zugeordnet, welche vorliegend scheibenförmig ausgebildet sind. Diese Achse 66 ist vertikal, d.h. senkrecht zur Vorschubrichtung des jeweiligen Werkstückes 11 ausgerichtet. Für das Biegen des Werkstückes 11 um dieses Biegewerkzeug 65 ist ein an sich bekannter schwenkbarer Spannarm 70 mit mehreren Spannbacken 64 vorgesehen. Diese Spannbacken 64 sind dabei im Spannarm 70 verstellbar angeordnet und werden mit einem hohen Druck gegen das Werkstück 11 und das Biegewerkzeug 65 angedrückt. Durch das mittels eines Biegeantriebes 68 erfolgenden Verschwenken des Spannarmes 70 um diese Achse 66 wird das Werkstück um den Aussenumfang des Biegewerkzeuges 65 massgenau gebogen.The bending device 60 are assigned a plurality of superimposed on an axis 66 bending tools 65, which are present disc-shaped. This axis 66 is vertical, that is aligned perpendicular to the feed direction of the respective workpiece 11. For the bending of the workpiece 11 to this bending tool 65, a known per se pivotable clamping arm 70 is provided with a plurality of clamping jaws 64. These jaws 64 are arranged adjustable in the clamping arm 70 and are at a high pressure against the Workpiece 11 and the bending tool 65 is pressed. By taking place by means of a bending drive 68 pivoting the clamping arm 70 about this axis 66, the workpiece is bent around the outer periphery of the bending tool 65 dimensionally accurate.

Gemäss Fig. 2 und Fig. 3 ist die Vorschubeinrichtung 30 als mehrteiliger Rahmen 30' mit einer Durchgangsöffnung 34 für den Dorn 42 schlittenförmig ausgebildet und hat zu diesem Zwecke auf der Ober- und Unterseite je eine Führung 22', welche in den Führungsbahnen 22 am Maschinenständer 20 gleiten. Neben diesen Führungen 22' sind von je einem separaten Antrieb 36 Zahnräder 24' angetrieben, welche mit einer jeweiligen Zahnstange 24 beim Maschinenständer bzw. Längsständer 12 in Eingriff stehen.According to Fig. 2 and Fig. 3 the feed device 30 as a multi-part frame 30 'with a through hole 34 for the mandrel 42 slidably formed and has for this purpose on the top and bottom each guide 22', which slide in the guideways 22 on the machine stand 20. In addition to these guides 22 'are each driven by a separate drive 36 gears 24', which are in engagement with a respective rack 24 at the machine stand or longitudinal stand 12.

Damit entsteht ein weiterer Vorteil im Rahmen einer bevorzugten Ausführungsform der Erfindung, denn durch diese beidseitige Führung und den beidseitigen Antrieb der Vorschubeinrichtung 30 wird auf diese eine hohe Stabilität durch Minimierung von Biegemomenten erzielt, und es können grosse Vorschubkräfte auf das Werkstück erzeugt werden.This results in a further advantage in the context of a preferred embodiment of the invention, because by this two-sided leadership and the two-sided drive of the feed device 30 a high stability is achieved by minimizing bending moments, and it can be generated large feed forces on the workpiece.

Gemäss Fig. 3 weist diese oben und unten an den Führungen 22 des Längsständers 12 verstellbare Vorschubeinrichtung 30 frontseitig eine Spannzange 50 mit oder ohne Verdrehvorrichtung für das Werkstück auf. Diese nicht weiter im Detail veranschaulichte Spannzange 50 ist höhenverstellbar gelagert, so dass das zu biegende Werkstück der Höhenposition des Biegewerkzeuges bei der Biegevorrichtung 60 angepasst werden kann.According to Fig. 3 this up and down on the guides 22 of the longitudinal stand 12 adjustable feed device 30 on the front side a collet 50 with or without twisting device for the workpiece. This collet 50, which is not illustrated in detail, is mounted in a height-adjustable manner, so that the workpiece to be bent can be adapted to the height position of the bending tool in the bending device 60.

Fig. 4 und Fig. 5 zeigen die Dornrückzugseinrichtung 40, welche einen mehrteiligen Rahmen 40' umfasst und schlittenförmig ausgebildet ist und wie die Vorschubeinrichtung 30 auf der Ober- und Unterseite je eine Führung 22' aufweist, welche in den Führungsbahnen 22 am Maschinenständer 20 gleiten. Zudem sind neben diesen Führungen 22' höhenverstellbare Zahnsegmente 44 in dem Rahmen 40' enthalten, durch welche die Einrichtung 40 mit dem Maschinenständer 20 verriegelbar ist. Damit ergibt sich eine sehr stabile sichere Positionierung des in das Werkstück einschiebbaren Dornes 42, welcher in einem höhenverstellbaren Schlitten 45 einspannbar ist. Eine mit dem Schlitten 45 wirkverbundene und von einem Antrieb 48 verdrehbare Spindel 47 ermöglicht die Höhenverstellung des Schlittens 45 und damit eine genaue Positionierung des Dornes 42 gegenüber dem Werkstück 11 bzw. dem Biegewerkzeug. 4 and FIG. 5 show the Dornrückzugseinrichtung 40, which comprises a multi-part frame 40 'and is formed sled-shaped and as the feed device 30 on the top and bottom each have a guide 22', which in the guideways 22 on the machine stand 20 slide. In addition, in addition to these guides 22 'height-adjustable toothed segments 44 are contained in the frame 40', through which the device 40 with the machine stand 20 can be locked. This results in a very stable secure positioning of the insertable into the workpiece mandrel 42, which is 45 clamped in a height-adjustable slide. An actively connected to the carriage 45 and rotatable by a drive 48 spindle 47 allows the height adjustment of the carriage 45 and thus accurate positioning of the mandrel 42 relative to the workpiece 11 and the bending tool.

Als weiteres bevorzugter Merkmal ist gemäss Fig. 6 der Spannarm 70 kastenförmig ausgebildet und ein die eine oder mehreren Spannbacken 64 aufnehmender Schlitten 75 ist beidseitig verstellbar in diesem Spannarm 70 geführt. Dieser Schlitten 75 ist in seiner Längsausdehnung zweckmässigerweise vertikal ausgerichtet und oben und unten in Führungen 72 des kastenförmigen Spannarmes 70 längsverstellbar gehalten. In Fig. 6 sind die diese Kastenform bildenden Seitenwände 71 am Spannarm 70, wie diese in Fig. 1 ersichtlich sind, weggelassen, damit der Schlitten 75 sichtbar ist.Another preferred feature is according to Fig. 6 the clamping arm 70 is box-shaped and a one or more jaws 64 receiving carriage 75 is guided on both sides adjustable in this clamping arm 70. This carriage 75 is expediently vertically aligned in its longitudinal extent and held longitudinally adjustable in guides 72 of the box-shaped clamping arm 70 at the top and bottom. In Fig. 6 are the box-forming side walls 71 on the clamping arm 70, as these in Fig. 1 are visible, omitted so that the carriage 75 is visible.

Sehr vorteilhaft ist der Schlitten 75 und mit ihm die Spannbacken 64 von einer Antriebseinrichtung 77 vorpositionierbar bzw. grob verschiebbar und zusätzlich von einer separaten Verspanneinrichtung 80 derart anstellbar, dass die Spannbacken 64 während dem Biegen gegen das Werkstück mit einer vorgegebenen Spannkraft anpressbar sind. Zu diesem Zwecke ist der Schlitten 75 von einer von der Antriebseinrichtung 77 drehbaren Spindel 79 verstellbar.Very advantageously, the carriage 75 and with it the clamping jaws 64 by a drive means 77 prepositioned or coarse and additionally adjustable by a separate Verspanneinrichtung 80 so that the clamping jaws 64 during bending against the workpiece with a predetermined clamping force can be pressed. For this purpose, the carriage 75 is adjustable by a spindle 79 rotatable by the drive device 77.

Diese die Biegewerkzeuge zentrierende Achse 66 ist an beiden Enden von je einem Flansch 73, 74 an dem kastenförmigen Spannarm 70 gelagert. Mit dem schematisch angedeuteten Biegeantrieb 68 unterhalb der Achse 66 kann dann der Spannarm 70 um die Achse 66 geschwenkt werden.This bending tools centering axis 66 is mounted at both ends of a respective flange 73, 74 on the box-shaped clamping arm 70. With the schematically indicated bending drive 68 below the Axis 66, then the clamping arm 70 can be pivoted about the axis 66.

Diese von der Antriebseinrichtung 77 separierte Verspanneinrichtung 80 zeichnet sich durch ein weiteres bevorzugtes Merkmal aus, nämlich dass diese durch ein Keilgetriebe 80 realisiert ist. Dieses Keilgetriebe 80 umfasst einen den Schlitten 75 verstellenden ersten Keil 81 und einen mit letzterem zusammenwirkenden zweiten Keil 82. Der erste Keil 81 ist an einem Rahmen 70' des Spannarmes 70 angeienkt, und diese mit dem Schlitten 75 drehverbundene Spindel 79 ihrerseits ist an diesem ersten Keil 81 gehalten. Der zweite Keil 82 ist quer zur Verstellrichtung des Schlittens 75 von einem nicht dargestellten Antrieb im Spannarm bewegbar und ist einerseits am ersten Keil 81 und andererseits am vertikalen Teil 70" des Rahmens 70' abgestützt. Bei einer Verstellung dieses zweiten Keils 82 wird der erste Keil 81 und mit ihm der Schlitten 75 in horizontaler Richtung gegen die Achse 66 hin bewegt.This tensioning device 80 separated from the drive device 77 is distinguished by a further preferred feature, namely that this is realized by a wedge gear 80. This wedge gear 80 includes a first wedge 81 displacing the carriage 75 and a second wedge 82 cooperating therewith. The first wedge 81 is hinged to a frame 70 'of the tensioning arm 70, and this spindle 79 rotatably connected to the carriage 75 is in turn at the first Wedge 81 held. The second wedge 82 is movable transversely to the direction of movement of the carriage 75 by a drive (not shown) in the clamping arm and is supported on the one hand on the first wedge 81 and on the other hand on the vertical part 70 "of the frame 70. When this second wedge 82 is adjusted, the first wedge becomes 81 and with it the carriage 75 in the horizontal direction against the axis 66 moves towards.

Es hat sich in überraschender Weise herausgestellt, dass mit diesem Keilgetriebe 80 eine optimale hohe Andrückkraft des Werkstückes an das Biegewerkzeug ermöglicht wird. Zudem wird durch diesen kastenförmigen Aufbau des Spannarmes 80 eine maximale Stabilität insbesondere bei diesen hohen Spannkräften erzielt.It has surprisingly been found that with this wedge gear 80 an optimal high pressure force of the workpiece is made possible to the bending tool. In addition, a maximum stability is achieved by this box-shaped structure of the clamping arm 80, especially at these high clamping forces.

Die Erfindung ist mit den oben erläuterten Ausführungsbeispielen ausreichend dargetan. Sie liesse sich jedoch noch in anderen Varianten darstellen, ohne von dem Umfang der beigefügten Ansprüche abzuweichen. So könnte im Prinzip der Maschinenständer im Bedarfsfall auch um 90° versetzt hingestellt werden, so dass die Vorschub- und Dornrückzugseinrichtung oben auf dem Längsständer hin- und her verschiebbar wären.The invention is sufficiently demonstrated with the embodiments explained above. However, it may be presented in other variants without departing from the scope of the appended claims. So, in principle, the machine stand could also be placed offset by 90 °, if necessary, so that the feed and Dornrückzugseinrichtung back on the longitudinal stand back and forth would be displaced.

Claims (13)

  1. A bending machine for bending elongated workpieces, in particular tubes and profiles, comprising a machine stand (20), comprising a feed device (30) guided with longitudinal movement on the latter and a mandrel withdrawal device (40), comprising a bending device (60) having at least one bending tool (65), a collet (50) receiving the at least one workpiece (11) being assigned to the feed device (30), characterised in that
    both the feed device (30) and the mandrel withdrawal device (40) are guided in the horizontal direction like a carriage on the front side of the machine stand (20) with longitudinal movement over the lower and upper side of the latter on one guide track (22) respectively, and thereby extend in an almost vertical longitudinal extension so that the charging of the feed device (30) with the at least one workpiece (11) and the operability of the mandrel withdrawal device (40) can take place easily and in a user-friendly manner, and that the collet (50) is mounted on the front side with height adjustment so that the workpiece (11) to be bent can be adapted to the height position of the bending tool (65) in the bending device (60).
  2. The bending machine according to Claim 1, characterised in that the feed device (30) and the mandrel withdrawal device (40) are supported on a common guide track (22).
  3. The bending machine according to Claim 1 or 2, characterised in that the feed device (30) is driven on the upper and lower side with at least one drive wheel (24') respectively, the drive wheels (24') being rotatable by a respective independent drive (36) and engaging with the respective guide track (22) having a toothed rack (24) in the machine stand (20).
  4. The bending machine according to any of Claims 1 to 3, characterised in that the mandrel withdrawal device (20) can be coupled to the feed device (30) by adjusting the latter, but being lockable while bending.
  5. The bending machine according to any of the preceding Claims 1 to 4, characterised in that the machine stand (20) is composed of a number of modules lined up next to one another and is configured such that the space formed by the travel of the feed device (30) and the mandrel withdrawal device (40) and the guide tracks (22) can be closed by one or more sliding doors (16) preferably made of transparent material and arranged along the long side.
  6. The bending machine according to Claim 5, characterised in that at least one electrical cabinet (17), machine control units or the like are positioned on the rear side of the machine stand (20).
  7. The bending machine according to any of the preceding Claims 1 to 6, characterised in that the machine stand (20) is configured such that the bending device (60) can be mounted on the left or the right of the face side of the machine stand, as required.
  8. The bending machine according to any of the preceding Claims 1 to 7, comprising a bending device (60) having at least one bending tool (65), comprising a clamping arm (70) that can be pivoted about this bending tool (65) and having at least one clamping jaw (64) by means of which a respective workpiece (11) can be bent around the bending tool (65), characterised in that
    the clamping arm (70) is in the form of a box in which a carriage (75) receiving the at least one clamping jaw (64) is guided adjustably on both sides.
  9. The bending machine according to Claim 8, characterised in that the carriage (75) is aligned vertically in its longitudinal extension and is guided at the top and the bottom in guides (72) of the box-shaped clamping arm (70) with longitudinal adjustment.
  10. The bending machine according to Claim 8 or 9, characterised in that the carriage (75), and with the latter the at least one clamping jaw (64), can be pre-positioned or roughly moved by a drive device (77) and additionally be activated by a separate bracing device (80) such that the one or more clamping jaws (64) can be pressed against the workpiece (11) with a pre-specified clamping force during the bending.
  11. The bending machine according to Claim 8, characterised in that an axle (66) centring the bending tool (11) is flexibly connected on both ends of a respective flange (73, 74) to the box-shaped clamping arm (70).
  12. The bending machine according to any of the preceding Claims 1 to 11, comprising a bending device (60) having at least one bending tool (65), comprising a clamping arm (70) that can pivot about this bending tool (65) and having at least one clamping jaw (64) by means of which a respective workpiece (11) can be bent about the bending tool (65), characterised in that
    the at least one clamping jaw (64) can be adjusted by a bracing device (80) such that it can be pressed with a pre-specified clamping force against the workpiece (11), the bracing device (80) having a wedge gearing mechanism.
  13. The bending machine according to Claim 12, characterised in that the wedge gearing mechanism comprises a first wedge (81) adjusting the at least one clamping jaw (64) via a carriage (75) and a second wedge (82) co-operating with the latter, the second wedge (82) being moveable by a controlled drive transversely to the adjustment direction of the carriage (75).
EP10760910.9A 2009-09-09 2010-09-09 Bending machine for bending elongated workpieces, in particular tubes and profiles Not-in-force EP2475474B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL10760910T PL2475474T3 (en) 2009-09-09 2010-09-09 Bending machine for bending elongated workpieces, in particular tubes and profiles

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH01395/09A CH701801A2 (en) 2009-09-09 2009-09-09 Bending machine for bending elongated workpieces, in particular pipes or profiles.
PCT/EP2010/005536 WO2011029594A2 (en) 2009-09-09 2010-09-09 Bending machine for bending elongated workpieces, in particular tubes and profiles

Publications (2)

Publication Number Publication Date
EP2475474A2 EP2475474A2 (en) 2012-07-18
EP2475474B1 true EP2475474B1 (en) 2013-07-10

Family

ID=43447340

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10760910.9A Not-in-force EP2475474B1 (en) 2009-09-09 2010-09-09 Bending machine for bending elongated workpieces, in particular tubes and profiles

Country Status (4)

Country Link
EP (1) EP2475474B1 (en)
CH (1) CH701801A2 (en)
PL (1) PL2475474T3 (en)
WO (1) WO2011029594A2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103447363A (en) * 2013-08-15 2013-12-18 冯东 Novel pipe bending machine
CN108941288A (en) * 2017-05-18 2018-12-07 张家港市伯勤机械厂 A kind of automatic loading/unloading bending machine

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2637454C2 (en) * 1976-08-20 1982-07-08 Robert Dipl.-Ing. 5000 Köln Schwarze Device for bending two nested tubes
DE3033300A1 (en) * 1980-09-04 1982-04-01 Rigobert Dipl.-Ing. 5000 Köln Schwarze PIPE BENDING MACHINE
DE3238264A1 (en) * 1982-10-15 1984-04-19 Rigobert Dipl.-Ing. 5000 Köln Schwarze PIPE BENDING MACHINE WITH BENDING PIN
CH683598A5 (en) * 1990-03-13 1994-04-15 Mewag Maschinenfabrik Ag Tube bending machine.
EP1380363B1 (en) 2002-07-13 2007-01-24 Trumpf Werkzeugmaschinen GmbH + Co. KG Bending machine
US7021102B2 (en) * 2003-03-15 2006-04-04 Trumpf Rohrtechnik Gmbh + Co. Kg Bending machine with bending tools on opposite sides of a tool platen

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103447363A (en) * 2013-08-15 2013-12-18 冯东 Novel pipe bending machine
CN108941288A (en) * 2017-05-18 2018-12-07 张家港市伯勤机械厂 A kind of automatic loading/unloading bending machine

Also Published As

Publication number Publication date
WO2011029594A2 (en) 2011-03-17
WO2011029594A3 (en) 2011-07-14
EP2475474A2 (en) 2012-07-18
PL2475474T3 (en) 2014-04-30
CH701801A2 (en) 2011-03-15

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