EP1380363B1 - Bending machine - Google Patents

Bending machine Download PDF

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Publication number
EP1380363B1
EP1380363B1 EP20020015761 EP02015761A EP1380363B1 EP 1380363 B1 EP1380363 B1 EP 1380363B1 EP 20020015761 EP20020015761 EP 20020015761 EP 02015761 A EP02015761 A EP 02015761A EP 1380363 B1 EP1380363 B1 EP 1380363B1
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EP
European Patent Office
Prior art keywords
bending
base member
machine base
workpiece
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.)
Expired - Lifetime
Application number
EP20020015761
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German (de)
French (fr)
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EP1380363A1 (en
Inventor
Frank Schmauder
Winfried Richter
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.)
Trumpf Werkzeugmaschinen SE and Co KG
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Trumpf Werkzeugmaschinen SE and Co KG
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Application filed by Trumpf Werkzeugmaschinen SE and Co KG filed Critical Trumpf Werkzeugmaschinen SE and Co KG
Priority to ES02015761T priority Critical patent/ES2280457T3/en
Priority to EP20020015761 priority patent/EP1380363B1/en
Priority to DE50209344T priority patent/DE50209344D1/en
Publication of EP1380363A1 publication Critical patent/EP1380363A1/en
Application granted granted Critical
Publication of EP1380363B1 publication Critical patent/EP1380363B1/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D7/00Bending rods, profiles, or tubes
    • B21D7/02Bending rods, profiles, or tubes over a stationary forming member; by use of a swinging forming member or abutment
    • B21D7/024Bending 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 for bending rod and / or rod-like workpieces, in particular of tubes, with a machine base body, arranged on the machine base bending tool and a workpiece feed device with a movable to the machine base body in a workpiece feed direction workpiece holder, wherein the workpiece by movement the workpiece holder relative to the bending tool in the workpiece feed direction undeliverable and is bendable by means of the bending tool to the machine base body out.
  • DE-A-1 527 394 discloses a bending machine having a machine base body and a bending tool arranged on the machine base body. The sides of the machine body expand from top to bottom to form a chamfer. It is not described whether and, if appropriate, in which way a workpiece to be machined is held and positioned.
  • a generic bending machine is known from DE-A-40 10 445.
  • a rotary bending tool is arranged on a front side of a rectangular machine base body in cross-section.
  • the rotary bending tool can be tubes that are postponed on the top of the machine body in the tube longitudinal direction, bend to the machine body back. In the area of their bent part, the machined tubes can also run counter to the pipe feed direction.
  • the machine body of the prior art pipe bending machine forms a relatively large "disturbing contour" due to its cross-sectional shape, i. a relatively large part of the engine body cross-section is in areas where a deformed pipe may run with a bent part. In the case of the prior art, therefore, there is a considerable risk of collisions machined workpieces with the machine body.
  • the present invention has set itself the goal.
  • this object is achieved by the bending machine according to claim 1.
  • the basic machine body according to the invention has sufficient rigidity and a sufficiently wide base to ensure the required stability and to accommodate functional units of the bending machine, for example, from functionally necessary drive means.
  • the interference contour is advantageously kept small at least at a bending tool end and thus in that area of the machine base body, in which most likely to collisions between machined workpieces and the machine body is to be expected.
  • Claim 3 relates to a bending machine according to the invention, in the case of which the machine base body is bevelled on both longitudinal sides. Consequently, this invention type results in a small interference contour in both right and left bending.
  • the claimed machine base body can thus be used for bending machines that are used exclusively for legal or exclusively for left or right as well as left bending.
  • Claim 4 describes measures according to the invention, which serve to keep the interference contour of the machine body regardless of the use of a Dorn Wegzugs issued.
  • Claim 5 describes an advantageous arrangement of a Maschinenhaltückhalterantreibes and / or a mandrel rod holder drive.
  • the workpiece holder of the workpiece feed device and / or the mandrel rod holder of the mandrel retraction device is arranged above at least one bevel of the machine base body on its upper side (claim 6).
  • the claims 7 and 8 describe bending machines according to the invention, which are advantageously designed as "inclined bed machines".
  • the bevel of the machine base body is used for the storage of at least one of the longitudinal guides and / or at least one drive device for the workpiece holder or the mandrel rod holder.
  • a bending machine 1 comprises a machine base body 2 in the form of a machine frame and a bending head 3, which is attached via a boom arrangement 4 to an end face of the machine base body 2.
  • the bending head 3 has a support structure 5 and a bending tool 6.
  • the bending tool 6 is a conventional rotary bending tool. Other tool designs are conceivable. Bending dies 7, 8 of the bending tool 6 are motor-driven about a bending axis 9 rotatable. A pivoting arm 10, which guides a clamping jaw 11 assigned to the bending die 7 and a clamping jaw 12 assigned to the bending die 8, can be pivoted about the bending axis 9.
  • the entire bending head 3 is rotatably mounted on the support structure 5 about an axis 13 on the boom assembly 4. This in turn is pivotally mounted about an axis 14 on the machine body 2.
  • the rotary or pivoting movement of the bending head 3 and the boom assembly 4 are numerically controlled as well as the other functions of the bending machine 1.
  • a workpiece feed device 15 Provided on the machine main body 2 are a workpiece feed device 15 and a mandrel retraction device 16.
  • the workpiece feed device 15 comprises a workpiece feed carriage 17 which, on its side facing the bending head 3, has a conventional rotary chuck as workpiece holder 18. This is used in the example shown to fix a tube formed as a workpiece 19.
  • a workpiece holder drive 20 with electric drive motors 21, 22 and gears 23, 24 is flanged to the workpiece feed carriage 17.
  • drive pinion on the output sides of the gear 23, 24 mesh with a drive means 25 in the form of a rack of the workpiece holder drive 20.
  • the rack is bolted to the machine body 2.
  • the workpiece 19 is delivered in the workpiece feed direction 26 relative to the bending head 3 and the bending tool 6.
  • the workpiece 19 By simultaneously rotating the workpiece holder 18 about the workpiece longitudinal axis, the workpiece 19 can be aligned in its circumferential direction relative to the bending tool 6. Due to the use of multiple drive motors and gearbox, the individual units can build relatively small.
  • the workpiece holder drive 20 is in "gantry operation". Accordingly, each of the electric drive motors 21, 22 is controlled independently.
  • the longitudinal guides 27, 28 on the machine base body 2 lead next to the workpiece feed carriage 17 of the workpiece feed device 15 and a Dorn Wegzugswagen 29 of the mandrel retracting means 16.
  • a mandrel bar not shown in detail is attached to a mandrel bar holder 30 of the mandrel retraction carriage 29 and interspersed by the Dorn Havenzugswagen 29 starting the Werk Swissvorschubwagen 17th
  • the mandrel bar is provided at its bending tool side end with a bending mandrel which can be moved by moving the Dornschreibzugwagen 29 between a use and a retracted position inside the workpiece 19 back and forth.
  • the movement of the Dorn Wegzugwagen 29 is effected by means of a mandrel rod holder drive 31, which in addition to an electric drive motor 32 and a gear 33 has a not recognizable in the figures drive pinion, which in turn also meshes with the rack or drive means 25.
  • the bending machine 1 is the cross-sectional shape of the machine base body 2.
  • the machine base body 2 has a substantially trapezoidal cross-sectional contour. This applies both to end plates 34, 35 as well as an intermediate and opposite the end plates 34, 35 recessed frame member 36, along which the workpiece feed carriage 17 and the Dorn Wegzugswagen 29 are movable.
  • the workpiece holder 18 and the mandrel bar holder 30 are arranged on the upper side of the machine base body 2. As FIG. 2 in particular clearly shows, this results in a cross-sectional contour with a substantially triangular shape for the entire bending machine 1.
  • the machine base body 2 expands at both in the workpiece feed direction 26 longitudinal sides towards the base to form chamfers 37, 38.
  • the chamfer 37 is straight, the chamfer 38 provided with bends.
  • the chamfer 38 supports the longitudinal guide 28 and the drive device 25 for guiding or for driving the workpiece feed carriage 17 and the Dorngurzugwagen 29.
  • the second longitudinal guide 27 is mounted on the upper side of the machine body 2.
  • the drive motors 21, 22 and the gear 23, 24 of the workpiece holder drive 20 are just like the drive motor 32 and the gear 33 of the mandrel rod holder drive 31 of the chamfer 38 and are aligned substantially parallel to the chamfer 38.
  • the said drive parts are arranged in alignment with each other in the workpiece feed direction 26 one behind the other.
  • the workpiece 19 is positioned with the bending tool 10 open by means of the workpiece feed device 15 in the workpiece feed direction 26 and in the circumferential direction.
  • the bending mandrel in the interior of the workpiece 19 is transferred by appropriate method of the Dorn Wegzugwagen 29 in its position of use.
  • the bending tool 10 is closed.
  • the workpiece 19 is thereby clamped between the bending die 7 and the clamping jaw 11. This results in the conditions shown in Fig. 1.
  • the swivel arm 10 is then pivoted with the clamping jaw 11 in the direction of arrow 39 about the bending axis 9 starting from the operating state according to FIG. 1. If the workpiece 19 in the direction of arrow 39 over an angle of more than 90 ° - in the example shown over an angle of about 180 ° - bent around the bending die 7, so the bent workpiece end runs counter to the workpiece feed direction 26 into the region of the machine base body 2.
  • Fig. 2 is the position of the bent end of the workpiece 19 indicated by dash-dotted lines.
  • the workpiece 19 pivots at about the axis 13 with respect to the position shown in FIG. 1, i. bent against the vertical bending head 3, with unchanged bending direction is bent.
  • the position assumed by the bent end of the workpiece 19 relative to the machine base body 2 is likewise indicated in FIG. 2 and provided there with the reference symbol 19 '.

Description

Die Erfindung betrifft eine Biegemaschine zum Biegen von stangen- und/oder von stabartigen Werkstücken, insbesondere von Rohren, mit einem Maschinengrundkörper, einem an dem Maschinengrundkörper angeordneten Biegewerkzeug sowie einer Werkstückvorschubeinrichtung mit einem an dem Maschinengrundkörper in einer Werkstückvorschubrichtung bewegbaren Werkstückhalter, wobei das Werkstück durch Bewegung des Werkstückhalters gegenüber dem Biegewerkzeug in Werkstückvorschubrichtung zustellbar und mittels des Biegewerkzeugs zu dem Maschinengrundkörper hin biegbar ist.The invention relates to a bending machine for bending rod and / or rod-like workpieces, in particular of tubes, with a machine base body, arranged on the machine base bending tool and a workpiece feed device with a movable to the machine base body in a workpiece feed direction workpiece holder, wherein the workpiece by movement the workpiece holder relative to the bending tool in the workpiece feed direction undeliverable and is bendable by means of the bending tool to the machine base body out.

DE-A-1 527 394 offenbart eine Biegemaschine mit einem Maschinengrundkörper und mit einem an dem Maschinengrundkörper angeordneten Biegewerkzeug. Die Seiten des Maschinengrundkörpers erweitern sich von oben nach unten unter Ausbildung einer Abschrägung. Nicht beschrieben wird, ob und gegebenenfalls in welcher Weise ein zu bearbeitendes Werkstück gehalten und positioniert wird.DE-A-1 527 394 discloses a bending machine having a machine base body and a bending tool arranged on the machine base body. The sides of the machine body expand from top to bottom to form a chamfer. It is not described whether and, if appropriate, in which way a workpiece to be machined is held and positioned.

Eine gattungsgemäße Biegemaschine ist bekannt aus DE-A-40 10 445. Im Falle des Standes der Technik ist ein Drehbiegewerkzeug an einer Stirnseite eines im Querschnitt rechteckigen Maschinengrundkörpers angeordnet. Mittels des Drehbiegewerkzeuges lassen sich Rohre, die auf der Oberseite des Maschinengrundkörpers in Rohrlängsrichtung nachgesetzt werden, zu dem Maschinengrundkörper hin biegen. Im Bereich ihres abgebogenen Teiles können die bearbeiteten Rohre auch entgegen der Rohrvorschubrichtung verlaufen. Der Maschinengrundkörper der vorbekannten Rohrbiegemaschine bildet aufgrund seiner Querschnittsform eine verhältnismäßig große "Störkontur" aus, d.h. ein verhältnismäßig großer Teil des Maschinengrundkörperquerschnittes liegt in Bereichen, in denen ein verformtes Rohr mit einem gebogenen Teil verlaufen kann. Im Falle des Standes der Technik besteht folglich eine erhebliche Gefahr von Kollisionen bearbeiteter Werkstücke mit dem Maschinengrundkörper.A generic bending machine is known from DE-A-40 10 445. In the case of the prior art, a rotary bending tool is arranged on a front side of a rectangular machine base body in cross-section. By means of the rotary bending tool can be tubes that are postponed on the top of the machine body in the tube longitudinal direction, bend to the machine body back. In the area of their bent part, the machined tubes can also run counter to the pipe feed direction. The machine body of the prior art pipe bending machine forms a relatively large "disturbing contour" due to its cross-sectional shape, i. a relatively large part of the engine body cross-section is in areas where a deformed pipe may run with a bent part. In the case of the prior art, therefore, there is a considerable risk of collisions machined workpieces with the machine body.

Diesbezüglich Abhilfe zu schaffen, hat sich die vorliegende Erfindung zum Ziel gesetzt.To remedy this situation, the present invention has set itself the goal.

Erfindungsgemäß gelöst wird diese Aufgabe durch die Biegemaschine gemäß Patentanspruch 1. Infolge der demnach vorgesehenen Anordnung der Werkstückvorschubeinrichtung am dem Maschinengrundkörper bildet der Maschinengrundkörper im Falle der Erfindung eine lediglich kleine Störkontur. Gleichzeitig besitzt der erfindungsgemäße Maschinengrundkörper eine hinreichende Steifigkeit sowie eine hinreichend breite Basis zur Gewährleistung der erforderlichen Standsicherheit und zur Unterbringung von Funktionseinheiten der Biegemaschine, beispielsweise von funktionsnotwendigen Antriebseinrichtungen.According to the invention, this object is achieved by the bending machine according to claim 1. As a result of the arrangement of the workpiece feed device provided on the machine base body of the machine body forms in the case of the invention, only a small interference contour. At the same time, the basic machine body according to the invention has sufficient rigidity and a sufficiently wide base to ensure the required stability and to accommodate functional units of the bending machine, for example, from functionally necessary drive means.

Besondere Ausführungsarten der Biegemaschine nach Patentanspruch 1 ergeben sich aus den abhängigen Patentansprüchen 2 bis 8.Particular embodiments of the bending machine according to claim 1 emerge from the dependent claims 2 to 8.

Gemäß Patentanspruch 2 ist die Störkontur vorteilhafterweise wenigstens an einem biegewerkzeugseitigen Ende und somit in demjenigen Bereich des Maschinengrundkörpers klein gehalten, in welchem am ehesten mit Kollisionen zwischen bearbeiteten Werkstücken und dem Maschinengrundkörper zu rechnen ist.According to claim 2, the interference contour is advantageously kept small at least at a bending tool end and thus in that area of the machine base body, in which most likely to collisions between machined workpieces and the machine body is to be expected.

Patentanspruch 3 betrifft eine erfindungsgemäße Biegemaschine, im Falle derer der Maschinengrundkörper an beiden Längsseiten abgeschrägt ist. Folglich ergibt sich bei dieser Erfindungsbauart eine kleine Störkontur sowohl beim Rechts- als auch beim Linksbiegen. Der anspruchsgemäße Maschinengrundkörper kann folglich für Biegemaschinen eingesetzt werden, die ausschließlich zum Rechts- oder ausschließlich zum Links- oder sowohl zum Rechts- als auch zum Linksbiegen dienen.Claim 3 relates to a bending machine according to the invention, in the case of which the machine base body is bevelled on both longitudinal sides. Consequently, this invention type results in a small interference contour in both right and left bending. The claimed machine base body can thus be used for bending machines that are used exclusively for legal or exclusively for left or right as well as left bending.

Patentanspruch 4 beschreibt erfindungsgemäße Maßnahmen, die dazu dienen, die Störkontur des Maschinengrundkörpers ungeachtet des Einsatzes einer Dornrückzugseinrichtung klein zu halten. Patentanspruch 5 beschreibt eine vorteilhafte Anordnung eines Werkstrückhalterantreibes und/oder eines Dornstangenhalterantriebes.Claim 4 describes measures according to the invention, which serve to keep the interference contour of the machine body regardless of the use of a Dornrückzugseinrichtung small. Claim 5 describes an advantageous arrangement of a Werkhaltückhalterantreibes and / or a mandrel rod holder drive.

In bevorzugter Ausgestaltung der Erfindung ist der Werkstückhalter der Werkstückvorschubeinrichtung und/oder der Dornstangenhalter der Dornrückzugseinrichtung oberhalb wenigstens einer Abschrägung des Maschinengrundkörpers auf dessen Oberseite angeordnet (Patentanspruch 6). In der Folge besteht beim Biegen von Werkstücken eine sehr weitgehende Wahlfreiheit bezüglich der Anordnung der Ebene der erstellten Biegung im Raum. Der Bereich oberhalb und seitlich des Werkstückhalters ist störkonturenfrei, in dem Bereich unterhalb des Werkstückhalters ist die von dem Maschinengrundkörper ausgebildete Störkontur klein.In a preferred embodiment of the invention, the workpiece holder of the workpiece feed device and / or the mandrel rod holder of the mandrel retraction device is arranged above at least one bevel of the machine base body on its upper side (claim 6). As a result, when bending workpieces, there is a very great freedom of choice with regard to the arrangement of the plane of the created bend in space. The area above and to the side of the workpiece holder is free from interference contours; in the area below the workpiece holder, the interference contour formed by the machine base body is small.

Die Patentansprüche 7 und 8 beschreiben erfindungsgemäße Biegemaschinen, die vorteilhafterweise als "Schrägbettmaschinen" ausgeführt sind. Die Abschrägung des Maschinengrundkörpers wird dabei zur Lagerung zumindest einer der Längsführungen und/oder wenigstens einer Antriebseinrichtung für den Werkstückhalter bzw. den Dornstangenhalter genutzt.The claims 7 and 8 describe bending machines according to the invention, which are advantageously designed as "inclined bed machines". The bevel of the machine base body is used for the storage of at least one of the longitudinal guides and / or at least one drive device for the workpiece holder or the mandrel rod holder.

Nachstehend wird die Erfindung anhand schematischer Darstellungen zu einem Ausführungsbeispiel näher erläutert. Es zeigen:

Fig. 1
eine perspektivische Gesamtansicht einer Biegemaschine und
Fig. 2
den Maschinengrundkörper der Biegemaschine nach Fig. 1 im Querschnitt.
The invention will be explained in more detail with reference to schematic representations of an embodiment. Show it:
Fig. 1
an overall perspective view of a bending machine and
Fig. 2
the machine base of the bending machine of Fig. 1 in cross section.

Gemäß Fig. 1 umfasst eine Biegemaschine 1 einen Maschinengrundkörper 2 in Form eines Maschinengestells sowie einen Biegekopf 3, der über eine Auslegeranordnung 4 an einer Stirnseite des Maschinengrundkörpers 2 angebracht ist. Der Biegekopf 3 weist eine Tragstruktur 5 sowie ein Biegewerkzeug 6 auf.According to FIG. 1, a bending machine 1 comprises a machine base body 2 in the form of a machine frame and a bending head 3, which is attached via a boom arrangement 4 to an end face of the machine base body 2. The bending head 3 has a support structure 5 and a bending tool 6.

Bei dem Biegewerkzeug 6 handelt es sich um ein herkömmliches Drehbiegewerkzeug. Andere Werkzeugbauarten sind denkbar. Biegematrizen 7, 8 des Biegewerkzeuges 6 sind motorisch um eine Biegeachse 9 drehbar. Um die Biegeachse 9 schwenkbar ist ein Schwenkarm 10, der eine der Biegematrize 7 zugeordnete Spannbacke 11 sowie eine der Biegematrize 8 zugeordnete Spannbacke 12 führt. Der gesamte Biegekopf 3 ist über die Tragstruktur 5 um eine Achse 13 drehbar an der Auslegeranordnung 4 gelagert. Diese wiederum ist um eine Achse 14 schwenkbar an dem Maschinengrundkörper 2 angebracht. Die Dreh- bzw. Schwenkbewegung des Biegekopfes 3 und der Auslegeranordnung 4 sind ebenso wie die übrigen Funktionen der Biegemaschine 1 numerisch gesteuert.The bending tool 6 is a conventional rotary bending tool. Other tool designs are conceivable. Bending dies 7, 8 of the bending tool 6 are motor-driven about a bending axis 9 rotatable. A pivoting arm 10, which guides a clamping jaw 11 assigned to the bending die 7 and a clamping jaw 12 assigned to the bending die 8, can be pivoted about the bending axis 9. The entire bending head 3 is rotatably mounted on the support structure 5 about an axis 13 on the boom assembly 4. This in turn is pivotally mounted about an axis 14 on the machine body 2. The rotary or pivoting movement of the bending head 3 and the boom assembly 4 are numerically controlled as well as the other functions of the bending machine 1.

An dem Maschinengrundkörper 2 vorgesehen sind eine Werkstückvorschubeinrichtung 15 sowie eine Dornrückzugseinrichtung 16.Provided on the machine main body 2 are a workpiece feed device 15 and a mandrel retraction device 16.

Die Werkstückvorschubeinrichtung 15 umfasst einen Werkstückvorschubwagen 17, der an seiner zu dem Biegekopf 3 hin liegenden Seite als Werkstückhalter 18 ein herkömmliches Dreh-Spannfutter aufweist. Dieses dient in dem gezeigten Beispielsfall zur Fixierung eines als Rohr ausgebildeten Werkstückes 19. Ein Werkstückhalterantrieb 20 mit elektrischen Antriebsmotoren 21, 22 und Getrieben 23, 24 ist an den Werkstückvorschubwagen 17 angeflanscht. Nicht im Einzelnen gezeigte Antriebsritzel an den Ausgangsseiten der Getriebe 23, 24 kämmen mit einer Antriebseinrichtung 25 in Form einer Zahnstange des Werkstückhalterantriebes 20. Die Zahnstange ist mit dem Maschinengrundkörper 2 verschraubt. Mittels des sich so ergebenden Zahnstangenantriebes wird das Werkstück 19 in Werkstückvorschubrichtung 26 gegenüber dem Biegekopf 3 bzw. dem Biegewerkzeug 6 zugestellt. Durch gleichzeitiges Drehen des Werkstückhalters 18 um die Werkstücklängsachse kann das Werkstück 19 in seiner Umfangsrichtung gegenüber dem Biegewerkzeug 6 ausgerichtet werden. Infolge der Verwendung mehrerer Antriebsmotoren und Getriebe können die einzelnen Aggregate verhältnismäßig klein bauen. In dem dargestellten Beispielsfall befindet sich der Werkstückhalterantrieb 20 im "Gantry-Betrieb". Dementsprechend wird jeder der elektrischen Antriebsmotoren 21, 22 selbständig geregelt.The workpiece feed device 15 comprises a workpiece feed carriage 17 which, on its side facing the bending head 3, has a conventional rotary chuck as workpiece holder 18. This is used in the example shown to fix a tube formed as a workpiece 19. A workpiece holder drive 20 with electric drive motors 21, 22 and gears 23, 24 is flanged to the workpiece feed carriage 17. Not shown in detail drive pinion on the output sides of the gear 23, 24 mesh with a drive means 25 in the form of a rack of the workpiece holder drive 20. The rack is bolted to the machine body 2. By means of the resulting rack drive, the workpiece 19 is delivered in the workpiece feed direction 26 relative to the bending head 3 and the bending tool 6. By simultaneously rotating the workpiece holder 18 about the workpiece longitudinal axis, the workpiece 19 can be aligned in its circumferential direction relative to the bending tool 6. Due to the use of multiple drive motors and gearbox, the individual units can build relatively small. In the illustrated example case, the workpiece holder drive 20 is in "gantry operation". Accordingly, each of the electric drive motors 21, 22 is controlled independently.

Zur Führung des Werkstückvorschubwagens 17 in Werkstückvorschubrichtung 26 dienen in diese Richtung verlaufende, als Führungsschienen ausgebildete Längsführungen 27, 28, die ebenso wie die Zahnstange bzw. Antriebseinrichtung 25 mit dem Maschinengrundkörper 2 verschraubt sind.To guide the workpiece feed carriage 17 in the workpiece feed direction 26 are used in this direction extending, designed as guide rails longitudinal guides 27, 28, which are screwed as well as the rack or drive means 25 to the machine body 2.

Die Längsführungen 27, 28 an dem Maschinengrundkörper 2 führen neben dem Werkstückvorschubwagen 17 der Werkstückvorschubeinrichtung 15 auch einen Dornrückzugswagen 29 der Dornrückzugseinrichtung 16. Eine nicht im Einzelnen gezeigte Dornstange ist an einem Dornstangenhalter 30 des Dornrückzugswagens 29 befestigt und durchsetzt von dem Dornrückzugswagen 29 ausgehend den Werkstückvorschubwagen 17, den Werkstückhalter 18 sowie das Werkstück 19. In bekannter Weise ist die Dornstange an ihrem biegewerkzeugseitigen Ende mit einem Biegedorn versehen, der durch Verfahren des Dornrückzugswagens 29 zwischen einer Gebrauchs- und einer Rückzugsstellung im Innern des Werkstückes 19 hin und her bewegt werden kann. Die Bewegung des Dornrückzugswagens 29 wird bewirkt mittels eines Dornstangenhalterantriebes 31, der neben einem elektrischen Antriebsmotor 32 sowie einem Getriebe 33 ein in den Abbildungen nicht erkennbares Antriebsritzel besitzt, das seinerseits ebenfalls mit der Zahnstange bzw. Antriebseinrichtung 25 kämmt.The longitudinal guides 27, 28 on the machine base body 2 lead next to the workpiece feed carriage 17 of the workpiece feed device 15 and a Dornrückzugswagen 29 of the mandrel retracting means 16. A mandrel bar not shown in detail is attached to a mandrel bar holder 30 of the mandrel retraction carriage 29 and interspersed by the Dornrückzugswagen 29 starting the Werkstückvorschubwagen 17th In a known manner, the mandrel bar is provided at its bending tool side end with a bending mandrel which can be moved by moving the Dornrückzugwagen 29 between a use and a retracted position inside the workpiece 19 back and forth. The movement of the Dornrückzugwagen 29 is effected by means of a mandrel rod holder drive 31, which in addition to an electric drive motor 32 and a gear 33 has a not recognizable in the figures drive pinion, which in turn also meshes with the rack or drive means 25.

Von besonderer Bedeutung für die Biegemaschine 1 ist die Querschnittsform des Maschinengrundkörpers 2.Of particular importance for the bending machine 1 is the cross-sectional shape of the machine base body 2.

Wie aus Fig. 1 und insbesondere aus Fig. 2 hervorgeht, besitzt der Maschinengrundkörper 2 eine im Wesentlichen trapezförmige Querschnittskontur. Dies gilt sowohl für Stirnplatten 34, 35 als auch für einen dazwischen liegenden und gegenüber den Stirnplatten 34, 35 zurückspringenden Gestellteil 36, an dem entlang der Werkstückvorschubwagen 17 sowie der Dornrückzugswagen 29 verfahrbar sind. Der Werkstückhalter 18 sowie der Dornstangenhalter 30 sind auf der Oberseite des Maschinengrundkörpers 2 angeordnet. Wie insbesondere Fig. 2 anschaulich zeigt, ergibt sich dadurch für die gesamte Biegemaschine 1 eine Querschnittskontur mit im Wesentlichen Dreiecksform.As is apparent from Fig. 1 and in particular from Fig. 2, the machine base body 2 has a substantially trapezoidal cross-sectional contour. This applies both to end plates 34, 35 as well as an intermediate and opposite the end plates 34, 35 recessed frame member 36, along which the workpiece feed carriage 17 and the Dornrückzugswagen 29 are movable. The workpiece holder 18 and the mandrel bar holder 30 are arranged on the upper side of the machine base body 2. As FIG. 2 in particular clearly shows, this results in a cross-sectional contour with a substantially triangular shape for the entire bending machine 1.

Unterhalb des Werkstückhalters 18 sowie des Dornstangenhalters 30 erweitert sich der Maschinengrundkörper 2 an beiden in Werkstückvorschubrichtung 26 verlaufenden Längsseiten zu der Basis hin unter Ausbildung von Abschrägungen 37, 38. Die Abschrägung 37 ist dabei geradlinig, die Abschrägung 38 mit Abwinkelungen versehen. Die Abschrägung 38 lagert die Längsführung 28 sowie die Antriebseinrichtung 25 zur Führung bzw. zum Antrieb des Werkstückvorschubwagens 17 sowie des Dornrückzugswagens 29. Die zweite Längsführung 27 ist auf der Oberseite des Maschinengrundkörpers 2 angebracht.Below the workpiece holder 18 and the mandrel rod holder 30, the machine base body 2 expands at both in the workpiece feed direction 26 longitudinal sides towards the base to form chamfers 37, 38. The chamfer 37 is straight, the chamfer 38 provided with bends. The chamfer 38 supports the longitudinal guide 28 and the drive device 25 for guiding or for driving the workpiece feed carriage 17 and the Dornrückzugwagen 29. The second longitudinal guide 27 is mounted on the upper side of the machine body 2.

Die Antriebsmotoren 21, 22 sowie die Getriebe 23, 24 des Werkstückhalterantriebes 20 liegen ebenso wie der Antriebsmotor 32 und das Getriebe 33 des Dornstangenhalterantriebes 31 der Abschrägung 38 gegenüber und sind im Wesentlichen parallel zu der Abschrägung 38 ausgerichtet.The drive motors 21, 22 and the gear 23, 24 of the workpiece holder drive 20 are just like the drive motor 32 and the gear 33 of the mandrel rod holder drive 31 of the chamfer 38 and are aligned substantially parallel to the chamfer 38.

Die genannten Antriebsteile sind dabei miteinander fluchtend in Werkstückvorschubrichtung 26 hintereinander angeordnet.The said drive parts are arranged in alignment with each other in the workpiece feed direction 26 one behind the other.

Zur Bearbeitung wird das Werkstück 19 bei geöffnetem Biegewerkzeug 10 mittels der Werkstückvorschubeinrichtung 15 in Werkstückvorschubrichtung 26 sowie in Umfangsrichtung positioniert. Der Biegedorn im Innern des Werkstückes 19 wird durch entsprechendes Verfahren des Dornrückzugswagens 29 in seine Gebrauchsstellung überführt. Anschließend wird das Biegewerkzeug 10 geschlossen. Im gezeigten Beispielsfalls wird das Werkstück 19 dadurch zwischen der Biegematrize 7 und der Spannbacke 11 eingespannt. Es ergeben sich die in Fig. 1 dargestellten Verhältnisse.For machining, the workpiece 19 is positioned with the bending tool 10 open by means of the workpiece feed device 15 in the workpiece feed direction 26 and in the circumferential direction. The bending mandrel in the interior of the workpiece 19 is transferred by appropriate method of the Dornrückzugwagen 29 in its position of use. Subsequently, the bending tool 10 is closed. In the example shown, the workpiece 19 is thereby clamped between the bending die 7 and the clamping jaw 11. This results in the conditions shown in Fig. 1.

Zur Erzeugung eines Rohrbogens wird dann ausgehend von dem Betriebszustand nach Fig. 1 der Schwenkarm 10 mit der Spannbacke 11 in Pfeilrichtung 39 um die Biegeachse 9 geschwenkt. Damit einher geht eine entsprechende Drehbewegung der Biegematrize 7. Wird das Werkstück 19 in Pfeilrichtung 39 über einen Winkel von mehr als 90° - in dem gezeigten Beispielsfall über einen Winkel von etwa 180° - um die Biegematrize 7 gebogen, so verläuft das abgebogene Werkstückende entgegen der Werkstückvorschubrichtung 26 bis in den Bereich des Maschinengrundkörpers 2. In Fig. 2 ist die Lage des abgebogenen Endes des Werkstückes 19 strichpunktiert angedeutet.To generate a pipe bend, the swivel arm 10 is then pivoted with the clamping jaw 11 in the direction of arrow 39 about the bending axis 9 starting from the operating state according to FIG. 1. If the workpiece 19 in the direction of arrow 39 over an angle of more than 90 ° - in the example shown over an angle of about 180 ° - bent around the bending die 7, so the bent workpiece end runs counter to the workpiece feed direction 26 into the region of the machine base body 2. In Fig. 2 is the position of the bent end of the workpiece 19 indicated by dash-dotted lines.

In Abhängigkeit von dem Anwendungsfall denkbar ist auch, dass das Werkstück 19 bei um die Achse 13 gegenüber der Position gemäß Fig. 1 verschwenktem, d.h. gegen die Vertikale schräggestelltem Biegekopf 3, mit unveränderter Biegerichtung gebogen wird. Die von dem abgebogenen Ende des Werkstückes 19 gegenüber dem Maschinengrundkörper 2 dann eingenommene Position ist ebenfalls in Fig. 2 angedeutet und dort mit dem Bezugszeichen 19' versehen.Depending on the application, it is also conceivable that the workpiece 19 pivots at about the axis 13 with respect to the position shown in FIG. 1, i. bent against the vertical bending head 3, with unchanged bending direction is bent. The position assumed by the bent end of the workpiece 19 relative to the machine base body 2 is likewise indicated in FIG. 2 and provided there with the reference symbol 19 '.

Auch ist es möglich, mit dem Biegewerkzeug 6 einen entgegen der Pfeilrichtung 39 verlaufenden Werkstückbogen zu erstellen. Zuvor ist das Biegewerkzeug 6 gegenüber seiner Stellung nach Fig. 1 um die Achse 13 zu drehen und durch Schwenken der Auslegeranordnung 4 um die Achse 14 mit der Biegematrize 8 und der Spannbacke 12 derart gegenüber dem Werkstück 19 auszurichten, dass dieses nach Schließen des Biegewerkzeuges 6 in den Rohrnuten der Biegematrize 8 und der Spannbacke 12 zu liegen kommt. Durch anschließendes Schwenken des Schwenkarms 10 und Drehen der Biegematrize 8 um die Biegeachse 9 wird der gewünschte Werkstückbogen erzeugt. Ist die Biegeachse 9 vertikal ausgerichtet, so ergibt sich für das abgebogene Werkstückende die in Fig. 2 mit 19'' gekennzeichnete Position; bei entsprechender Neigung der Biegeachse 9 gegenüber der Vertikalen nimmt das abgebogene Ende des Werkstückes 19 gemäß Fig. 2 eine Position 19''' ein.It is also possible to create with the bending tool 6 a counter to the arrow 39 extending workpiece arc. 1, the bending tool 6 to rotate about the axis 13 and align by pivoting the boom assembly 4 about the axis 14 with the bending die 8 and the clamping jaw 12 relative to the workpiece 19, that this after closing the bending tool. 6 in the tube grooves of the bending die 8 and the clamping jaw 12 comes to rest. By subsequently pivoting the pivot arm 10 and rotating the bending die 8 about the bending axis 9 of the desired workpiece arc is generated. If the bending axis 9 is aligned vertically, the result for the bent workpiece end is the position marked 19 '' in FIG. 2; with appropriate inclination of Bending axis 9 relative to the vertical takes the bent end of the workpiece 19 of FIG. 2, a position 19 '''a.

Die Querschnittskontur des Maschinengrundkörpers 2 bewirkt in Kombination mit der Anordnung des Werkstückhalters 18 und des Dornstangenhalters 30 sowie im Zusammenspiel mit der Ausrichtung der elektrischen Antriebsmotoren 21, 22, 32 und der Getriebe 23, 24, 33, dass es in keinem der veranschaulichten Bearbeitungsfälle zu einer Kollision des entgegen der Vorschubrichtung 26 abgebogenen Endes des Werkstückes 19 mit einem Teil der Biegemaschine 1 kommt.The cross-sectional contour of the machine body 2, in combination with the arrangement of the workpiece holder 18 and the mandrel bar holder 30 and in conjunction with the orientation of the electric drive motors 21, 22, 32 and the gear 23, 24, 33, that in any of the illustrated processing cases to a Collision of the opposite to the feed direction 26 bent end of the workpiece 19 with a part of the bending machine 1 comes.

Claims (8)

  1. Bending machine for bending bar-like and/or rod-like workpieces (19), in particular pipes, having a machine base member (2), a bending tool (6) which is arranged on the machine base member (2) and a workpiece feeding device (15) having a workpiece holder (18) which is movable in a workpiece feeding direction (26) on the machine base member (2), with the workpiece (19) being able to be advanced in a workpiece feeding direction (26) relative to the bending tool (6) by moving the workpiece holder (18) and being able to be bent by means of the bending tool (6) towards the machine base member (2), characterised in that the machine base member (2) widens at least at a side which extends in the workpiece feeding direction (26) towards the base of the machine base member (2) with increasing spacing from the workpiece holder (18) transversely to the workpiece feeding direction (26) with at least one inclined portion (37, 38) being formed, the workpiece feeding device (15) being located at least partially opposite an inclined portion (37,38) of the machine base member (2).
  2. Bending machine according to claim 1, characterised in that the machine base member (2) widens towards the base of the machine base member (2) at least at an end located at the bending tool side.
  3. Bending machine according to either of the preceding claims, characterised in that the machine base member (2) forms at least one inclined portion (37, 38) at each of the two longitudinal sides which extend in the workpiece feeding direction (26).
  4. Bending machine according to any one of the preceding claims for bending rod-like and/or bar-like workpieces (19) in the form of hollow profile-members, in particular pipes, characterised in that there is provided a mandrel retraction device (16) having a mandrel bar holder (30) which is movable in and counter to the workpiece feeding direction (26) on the machine base member (2) and by the movement of which a bending mandrel can be moved back and forth between a position for use and a retraction position, and in that the mandrel retraction device (16) is located at least partially opposite an inclined portion (37, 38) of the machine base member (2).
  5. Bending machine according to any one of the preceding claims, characterised in that the workpiece feeding device (15) is located opposite an inclined portion (37, 38) of the machine base member (2) at least with a portion of a workpiece holder drive (20) and/or in that the mandrel retraction device (16) is located opposite an inclined portion (37, 38) of the machine base member (2) at least with a portion of a mandrel bar holder drive (31).
  6. Bending machine according to any one of the preceding claims, characterised in that the workpiece holder (18) and/or the mandrel bar holder (30) is/are arranged above at least one inclined portion (37, 38) of the machine base member (2) at the upper side of the machine base member (2).
  7. Bending machine according to any one of the preceding claims, characterised in that the pipe holder (18) and/or the mandrel bar holder (30) is/are guided in a movement direction by means of at least two longitudinal guides (27, 28) which are fitted to the machine base member (2) and which are displaced relative to each other both horizontally and vertically, and at least one of the longitudinal guides (27, 28) is provided at an inclined portion (37, 38) of the machine base member (2).
  8. Bending machine according to any one of the preceding claims, characterised in that the workpiece holder (18) and/or the mandrel bar holder (30) is/are driven in a movement direction by means of at least one drive device (25) which is fitted to the machine base member (2), and the drive device (25) is provided at an inclined portion (37, 38) of the machine base member (2).
EP20020015761 2002-07-13 2002-07-13 Bending machine Expired - Lifetime EP1380363B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
ES02015761T ES2280457T3 (en) 2002-07-13 2002-07-13 BINDING MACHINE.
EP20020015761 EP1380363B1 (en) 2002-07-13 2002-07-13 Bending machine
DE50209344T DE50209344D1 (en) 2002-07-13 2002-07-13 bending machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20020015761 EP1380363B1 (en) 2002-07-13 2002-07-13 Bending machine

Publications (2)

Publication Number Publication Date
EP1380363A1 EP1380363A1 (en) 2004-01-14
EP1380363B1 true EP1380363B1 (en) 2007-01-24

Family

ID=29724450

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20020015761 Expired - Lifetime EP1380363B1 (en) 2002-07-13 2002-07-13 Bending machine

Country Status (3)

Country Link
EP (1) EP1380363B1 (en)
DE (1) DE50209344D1 (en)
ES (1) ES2280457T3 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH701801A2 (en) 2009-09-09 2011-03-15 Mewag Maschinenfabrik Ag Bending machine for bending elongated workpieces, in particular pipes or profiles.

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1527394A1 (en) * 1963-06-14 1969-12-18 Claude Ragache Universal bending machine
CH683598A5 (en) * 1990-03-13 1994-04-15 Mewag Maschinenfabrik Ag Tube bending machine.

Also Published As

Publication number Publication date
DE50209344D1 (en) 2007-03-15
EP1380363A1 (en) 2004-01-14
ES2280457T3 (en) 2007-09-16

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