EP3052256B1 - Bending press and bending method - Google Patents

Bending press and bending method Download PDF

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Publication number
EP3052256B1
EP3052256B1 EP14805166.7A EP14805166A EP3052256B1 EP 3052256 B1 EP3052256 B1 EP 3052256B1 EP 14805166 A EP14805166 A EP 14805166A EP 3052256 B1 EP3052256 B1 EP 3052256B1
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EP
European Patent Office
Prior art keywords
bending
clamping
guide
edge
workpiece
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EP14805166.7A
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German (de)
French (fr)
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EP3052256A1 (en
Inventor
Wolfgang Aigner
Stefano Speziali
Thomas Weiss
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Trumpf Maschinen Austria GmbH and Co KG
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Trumpf Maschinen Austria GmbH and Co KG
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Publication of EP3052256A1 publication Critical patent/EP3052256A1/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
    • B21D5/00Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/04Bending sheet metal along straight lines, e.g. to form simple curves on brakes making use of clamping means on one side of the work
    • 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
    • B21D5/00Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/002Positioning devices

Definitions

  • the invention relates to a bending press according to the preamble of claim 1 and a method for forming a workpiece according to the preamble of claim 13.
  • An important factor in this case is to be able to carry out forming angles of more than 90 ° on the workpiece so that bending angles of at least 90 ° can be achieved even after an unavoidable return spring of a workpiece that occurs during unloading.
  • a bending edge arranged on the bending cheek of a swivel press brake be moved in a first step at a distance at jaws or holddowns, which is the workpiece hold and then in a second step is moved transversely in the direction of the hold-down to form a forming angle on the workpiece to be able to effect as 90 °. Since this is not possible with a simple straight guide of the bending beam, have folding machines on consuming and complicated guides and drives in order to perform such combined movements of the bending cheek can. This complexity of the bending-beam drive also often brings limitations of the possible bending length and the machinable workpiece thickness.
  • the object of the invention is to provide a bending press which has the advantages of the known pivoting bending method, but has a simple structure and has the said limitations only to a lesser extent.
  • the object of the invention is achieved by a generic bending press, in which the bending beam guide is designed as a linear guide and a rectilinear trajectory of the bending edge causes and the forming edges of both jaws are adjustable by means of a transverse guide the clamping bar and an adjustment along an adjustment, which is connected to the trajectory approximates the bending edge.
  • This relative movement of Clamping bar transversely to the movement path of the bending beam can be done at right angles or obliquely to the movement path of the bending beam.
  • the complicated movement of the bending cheek of a swing bending press relative to the fixed jaws holding the workpiece is replaced by a combination of simple movements of the bending beam and the jaws.
  • the straight guide of the bending beam is preferably oriented in the vertical direction, but there are also embodiments possible in which the straight guide obliquely to the vertical direction or horizontally.
  • the leadership of the clamping bar does not necessarily have to be rectilinear, but can also cause a movement in the form of a curve that approximates the linear trajectory of the bending beam. For example, a movement of the clamping bar along a part of a circular path can take place.
  • the transverse guide comprises the clamping bar guide of the second clamping bar and one of them structurally separate clamping bar guide of the first clamping bar, the adjustment paths of the clamping bar parallel to each other. Since a clamping bar guide and a clamping bar drive is required in any case for carrying out the clamping operation, it can be advantageously used in this specific embodiment also for the purposes of transverse guidance.
  • the clamping bar guide of the first clamping bar can be constructed structurally simple the same as the clamping bar guide of the second clamping bar.
  • clamping bar guides are formed as mutually parallel linear guides and extend in a helix angle, in particular between 10 ° and 30 °, to the bending guide. Neglecting the effects of friction results in a Helix angle of 30 ° with respect to the adjusting force in the direction of the jaw guide a twice as large force component for the transverse adjustment.
  • transverse guide of the clamping bar runs approximately at right angles to the bending beam guide.
  • the respective guides and drives can be designed optimized for the respective requirement.
  • the transverse guide and the adjustment require in contrast to the clamping bar only a small work path, which is why a variety of structural solutions can be chosen, such. Linear guides, eccentric guides, etc.
  • a stable synchronization of the movement of the two clamping bars is achieved when the clamping bar guides are arranged on a clamping bar frame, which is adjustable relative to the machine frame by means of the transverse guide and the adjusting transversely, ie at right angles or obliquely to the trajectory of the bending edge. Any differences in the movements of the clamping bar by two separate acting on the clamping bar frame drives can be avoided if a common central adjustment is provided for adjusting the clamping bar frame.
  • An assembly-friendly embodiment of a bending press is achieved when the bending beam guide on a first frame part, in particular O-frame, and the clamping bar guide and the transverse guide on a second thereto spaced second frame part, in particular O-frame are arranged.
  • the two O-frames are connected by suitable side stands.
  • a slim and material-saving embodiment of a bending press is provided when the bending beam guide and the jaw guide and the transverse guide on opposite outer sides of a central frame part, in particular an O-frame, are arranged.
  • the power flow between the bending beam and clamping bar in this case takes place over a short distance directly over the central frame part.
  • a common beam frame in particular O-frame, and this is rectilinearly adjustable by means of the bending beam guide.
  • the common beam frame has a high deformation stiffness and can be performed very accurately, which also gives increased bending accuracy.
  • a horizontal distance between the clamping bar and the bending beam is adjustable.
  • the bending process can be carried out at an increased distance and thus with a longer lever arm, e.g. at least three times the material thickness of the workpiece to be introduced, whereby the bending drive can be spared or can be made smaller.
  • the flexible applicability of a bending press is substantially increased if the forming edges on the jaws and / or the bending edge on the bending beam from tool segments in the form of bending tools and clamping tools are assembled and thereby easily different lengths of the bending edge or the Umformkanten can be realized.
  • setup operations can e.g. also be automated with spindles for tool movement.
  • the object of the invention is further achieved by a method for forming a workpiece, in which this is clamped between a first jaw with a first forming edge and a second jaw with a second forming edge so that a portion protrudes between the forming edges and then a bending edge of a adjustable bending beam is guided past the Umformkanten at a distance, whereby the portion is angled relative to the clamped between the jaws part of the workpiece.
  • the bending edge is guided during bending along a rectilinear trajectory and, after the bending edge has passed the forming edges, the latter has been displaced along an adjustment path which approaches the trajectory of the bending edge.
  • An easily practicable variant of the method is that after the bending edge has passed the Umformkanten, the adjustment of the bending edge is largely or completely stopped and simultaneously or immediately thereafter the Umformkanten are guided at a right angle to or across the trajectory of the bending edge ,
  • the lower jaw or the lower clamping bar requires no adjustability in the vertical direction and a vertical adjustment of the workpiece during the forming process is not required.
  • An alternative embodiment of the method may be that after the bending edge has passed the forming edges, the forming edges are guided at a skew angle transversely to or across the trajectory of the bending edge and the adjustment of the bending edge coupled with the movement of Umformkanten until the completion of the forming process will continue.
  • the transverse guidance of the clamping bar can be accomplished in this case solely by two parallel clamping bar guides.
  • Fig. 1 and 2 the inventive method for forming a workpiece 1 is shown, wherein in Fig. 1 the state before the beginning of the forming process and in Fig. 2 the state is shown at the end of the forming process. It is a special embodiment of the known as swivel bending forming process.
  • the workpiece 1 is clamped between a first clamping jaw 2 and a second clamping jaw 3, so that a partial section 4 can be angled relative to the remaining workpiece 1 during the subsequent forming process.
  • the workpiece 1 consists of at least partially planar material that is suitable for a bending deformation.
  • On the jaw 2 a forming edge 5 is formed, which is effective when the portion 4 is angled downwards, and is formed on the second jaw 3, a second forming edge 6, which is effective when the portion 4 is angled upward.
  • the jaws 2, 3 have a shoe-like cross-section, whereby a workpiece 1 on the Umformkanten 5, 6 can be bent beyond a right angle.
  • a bending beam 7 which has a bending edge 8.
  • a bending beam 7 is shown with a bending edge 8, which is provided for an angling of the section 4 down.
  • the forming edges 5, 6 are provided with a radius which also influences the smallest possible inner radius of the bent workpiece at the forming point.
  • the bending beam 7 is moved approximately at right angles to a horizontal workpiece plane 9 downward, wherein the bending edge 8 has a horizontal distance 10 to the forming edges 5, 6.
  • the distance 10 is at least as large as a workpiece thickness 11 selected, and is preferably 1.5 times to 8 times the workpiece thickness 11. Especially with thick workpieces 1, a greater distance 10, the initiation of the forming process by better leverage facilitate.
  • the bending edge 8 is guided along a rectilinear trajectory 12, even after it has passed the two forming edges 5 and 6 and thereby the portion 4 is brought into an angled position.
  • a linear trajectory 12 of the bending edge 8 of the section 4 can be angled up to 90 ° maximum, if a distance 10 is selected, which corresponds approximately to the workpiece thickness 11, by an unavoidable springback after removal of the bending edge. 8 can thus be achieved with the rectilinear movement of the bending edge 8 only a deformation angle smaller than 90 °.
  • the bending edge 8 remains even after passing through the forming edge 5, 6 on its rectilinear trajectory 12, and an angling of the portion 4 is caused beyond 90 °, that the Forming edges 5, 6 of both clamping jaws 2, 3 are adjusted together with the clamped workpiece 1 along an adjustment path 13, which approximates the trajectory 12 of the bending edge 8 and in Fig. 2 is shown by an arrow.
  • the workpiece 1 that is angled downwards from the bending edge 8 in front of the transverse movement of the clamping edges 5, 6 is indicated by dashed lines in FIG.
  • the subsequent reduction of the distance 10 between clamping jaws 2, 3 and the bending beam 7 and the forming edges 5, 6 and the bending edge 8 after passing through the Umformkanten 5, 6 results accordingly from a transverse to the rectilinear trajectory 12 relative movement between the jaws. 2 It is possible that during this relative movement of the bending beam 7 is at a standstill and only the jaws 2, 3 are moved with the clamped workpiece 1, but it is also possible that the rectilinear movement of the bending edge.
  • the adjustment path 13 of the clamping jaws 2, 3 is not necessarily oriented at right angles to the movement path 12 of the bending edge 8, but may also run obliquely to it along a straight line or along a curved path, for example a circular path, which runs obliquely to the movement path 12.
  • Fig. 2 is shown with dotted arrow such a curved adjustment path 14, which can be generated for example by means of an Exzenterlagerung the jaws 2, 3 or the machine parts carrying these.
  • Fig. 1 and 2 is further shown with a double arrow, the clamping movement 15 of the jaw 3 relative to the jaw 2.
  • An alternative embodiment of the method is also in Fig. 2 indicated, in which the bending beam 7 a deviating from the vertical direction, but again straight with dashed arrow indicated trajectory 16 is moved along and the jaws 2, 3 pass through with the clamped workpiece 1 a relation to the vertical direction oblique adjustment 17.
  • the adjusting movements of the bending beam 7 and the clamping jaws 2, 3 can be coupled by a control device so that there is an optimal relative to the forming process relative movement.
  • Fig. 3 shows a rear view of a bending press 18 according to the invention with the basis of the Fig. 1 and 2 described forming process can be performed.
  • the bending press 18 comprises a machine frame 19, in which already with reference to Fig. 1 and 2 described, adjustable bending beam 7 and two clamping jaws 2, 3 supporting clamping beams are mounted adjustable.
  • the illustrated machine frame 19 comprises at its front side 20 a plate-shaped O-frame 21 and at its rear side 22 likewise a plate-shaped O-frame 23.
  • the recesses in the O-frames 21 and 23 form a passage opening 24 which extends through the bending press 18 extends and allows the feeding of a workpiece 1 to the clamping bar or the bending beam 7 and, for example, also allows the discharge of the bent workpiece on the back 22.
  • a support device 25 is arranged in the illustrated embodiment, which can carry the outside of the bending press 18 located part of a workpiece 1 and optionally also in addition to the running of the jaws 2, 3 with the clamped workpiece 1 movements synchronously, to avoid unwanted work piece deformations.
  • This adjustment of the support device 25 is in Fig. 3 indicated by double arrows in the main coordinate directions.
  • the machine frame 19 further comprises side stand, which connect the two O-frames 21, 23 in the illustrated embodiment. Gaps between structural components of the machine frame 19 may be closed by covers, whereby a largely closed machine exterior is given.
  • Fig. 4 shows a cross section through a further embodiment of a bending press 18, with which a workpiece 1 can be angled.
  • a workpiece 1 can be introduced through a through hole 24 in the machine frame 19 in the interior of the bending press 18, where it is held by a clamping device 26 for carrying out the forming process.
  • the clamping device 26 comprises a first clamping bar 27 which carries the first clamping jaw 2 and a second clamping bar 28 which carries the second clamping jaw 3.
  • the second clamping bar 28 is adjustable relative to the first clamping bar 27 by means of a clamping bar guide 29 and a clamping bar drive 30.
  • the first lower clamping bar 27 is extended in this embodiment to an O-frame 31 which extends into the upper half of the bending press 21 and carries the fixed part of the clamping bar guide 29.
  • the clamping bar drive 30 is formed in the illustrated embodiment by a hydraulic cylinder 32, but may alternatively be performed by a spindle drive with electric motor.
  • the adjustable bending beam 7 is mounted by means of a bending beam guide 33 in the form of a linear guide 34 adjustable on the machine frame 19 and is driven by a bending beam drive 35, here in the form of a hydraulic cylinder 36.
  • the bending edge 8 at the lower end of the bending beam describes a rectilinear trajectory 12 (see Fig. 1, 2 ), which runs in the illustrated embodiment in the vertical direction.
  • a movement path 12 deviating from the vertical direction could also be possible.
  • the bending edge 8 may be formed by a bending tool 37 removably mounted on the bending beam 7.
  • the bending edge 8 can be adjusted in length by juxtaposition of such bending tools 37 to the required bending task.
  • a further bending beam 38 may be provided with a further bending edge 39, with a workpiece 1 can also be angled upwards.
  • a further bending beam 38 may be provided with a further bending edge 39, with a workpiece 1 can also be angled upwards.
  • bending process 27 and 28 are mounted by means of a transverse guide 40 and an adjustment 41 relative to the machine frame 19 in the horizontal direction adjustable.
  • a section of the workpiece 1 angled off with the aid of the bending beam 7 or the bending edge 8 can be angled over a deformation angle of greater than 90 °.
  • the adjusting drive 41 is supported on the one hand on the machine frame 19 and on the other hand on the O-frame 31, which is connected to the lower clamping bar 27 and the clamping bar guide 29 with the upper clamping bar 28.
  • the O-frame 31 is guided on its underside and its top over the transverse guide 40 on the machine frame 19, wherein as a transverse guide 40 in the illustrated embodiment, a linear guide is provided.
  • a transverse guide 40 would also be possible by means of eccentric mounting on the machine frame 19, as a result of which an in Fig. 2 already shown, arcuate adjustment 14 for approaching the jaws 2, 3 to the path of movement of the bending edge 8 is possible.
  • the adjusting drive 41 is realized in the illustrated embodiment by two hydraulic cylinders 42 which perform synchronized movements and thereby ensure a uniform horizontal adjustment.
  • a bending press 18 is advantageous that the lower jaw 2 has no vertical component of movement during the forming process and therefore a clamped workpiece 1 must be moved only in the horizontal direction. A vertical adjustment of a support device 25 is not required in this case.
  • Fig. 4 shows further that the markers 2, 3 can be composed of attached to the clamping bar 27, 28 clamping tools 43.
  • a further and optionally independent embodiment of a bending press 18 is shown, again for the same reference numerals or component designations as in the preceding Fig. 1 to 4 be used.
  • the machine frame 19 comprises two O-frames 21 and 23 which are spaced apart from one another and between which cooperating clamping beams 27 and 28 and the alternatively used bending beams 7 and 38 are arranged to be adjustably mounted.
  • the bending beams 7, 38 carry, as already based on Fig. 4 Bending tools 37, with which an adapted for the respective bending task bending edge 8 or 39 is formed.
  • the bending tools 37 can thereby be automatically guided, for example, by means of movement spindles 44 along the bending beam 7, 38.
  • the bending beams 7 and 38 are adjustably mounted by means of linear guides 34 on the inside of the O-frame 23 and further driven by means not shown Biegebalkenantrieben 35, for example in the form of hydraulic cylinders or spindle drives with electric motor drive-connected.
  • clamp jaws 2, 3 bearing clamping bar 27 and 28 are mounted on the inside of the other O-frame 21, wherein the clamping bar guide 29 of the upper clamping bar 28 with respect to the bending beam guide 33 in the form of the linear guide 34 is arranged obliquely.
  • the obliquely arranged clamping beam guide 29 is in this embodiment part of the transverse guide 40, which further includes a clamping bar guide 45 of the lower clamping bar 27. This is aligned parallel to the clamping bar guide 29 of the upper clamping bar 28, which is why a workpiece 1 clamping clamping bars 2 and 3 can be adjusted exactly synchronously with each other.
  • These are in Fig. 5 not shown Klemmbalkenantriebe provided, for example, include hydraulic cylinders or spindle drives with electric motors.
  • the adjustment drive 41 for the clamping bar 27 and 28 is formed in this embodiment by the two synchronized beam drives.
  • a support element 46 may be provided at the lower clamping bar 27 be that forms part of a support device 25 for a workpiece 1.
  • the two O-frames 21 and 23 are interconnected via side posts 47 or other cross connectors, whereby the power flow between the two O-frames 21 and 23 is made.
  • the inclination of the clamping beam guides 29 and 45 may be made for example by wedge-shaped spacers 48, on which bearing rails for the linear guides of the clamping bar guides 29, 45 are attached.
  • An existing between the linear guide 34 of the bending beam 7, 38 and the clamping bar guides 29, 45 helix angle 49 is in particular between 10 ° and 30 °.
  • Fig. 6 is a further and optionally independent embodiment of the bending press 18 is shown, again for like parts, the same reference numerals or component designations as in the preceding Fig. 1 to 5 be used. In order to avoid unnecessary repetition, the detailed description in the previous ones will be used Fig. 1 to 5 referred or referred.
  • the embodiment according to Fig. 6 has one according to the embodiment according to Fig. 5 similar kinematics of the bar movement, but it is different from Fig. 5 a central, plate-shaped frame member 50 is provided, on whose opposite outer sides 51 and 52, the bending beam guides 33, 34 and the clamping bar guides 29 and 45 are arranged.
  • the power flow from the Umformkanten to the bending edge takes place in this embodiment directly over the central frame member 50 and can be dimensioned weaker in this embodiment, the side stand 47 due to the lower load.
  • the central frame part 50 is embodied, for example, as an O-frame and results in a very large bending clearance both in front of and behind the bending tools.
  • two mutually distanced and oppositely oriented bending beam 7, 38 are arranged on a common beam frame, in particular O-frame, and this is rectilinearly adjustable by means of the bending beam guide 33 in the form of linear guide 34.

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

Description

Die Erfindung betrifft eine Biegepresse gemäß Oberbegriff des Anspruches 1 und ein Verfahren zum Umformen eines Werkstücks gemäß Oberbegriff des Anspruches 13.The invention relates to a bending press according to the preamble of claim 1 and a method for forming a workpiece according to the preamble of claim 13.

Das sogenannte Schwenkbiegen und dazu verwendete Schwenkbiegepressen sind seit langem in Verwendung, insbesondere bei der Herstellung von Blechgehäusen oder Blechprofilen sind sie lange bekannter Stand der Technik (z.B. EP 1 797 973 A1 ).The so-called swivel bending and swing bending presses used for this purpose have long been in use, especially in the production of sheet metal housings or sheet metal profiles they are long known prior art (eg EP 1 797 973 A1 ).

Ein wichtiger Faktor dabei ist, am Werkstück Umformwinkel von mehr als 90° durchführen zu können, damit auch nach einem unvermeidbaren, bei Entlastung auftretenden Rückfedern eines Werkstücks Biegewinkel von zumindest 90° erzielt werden können.An important factor in this case is to be able to carry out forming angles of more than 90 ° on the workpiece so that bending angles of at least 90 ° can be achieved even after an unavoidable return spring of a workpiece that occurs during unloading.

Dies erfordert, dass eine an der Biegewange einer Schwenkbiegepresse angeordnete Biegekante in einem ersten Schritt in einem Abstand an Klemmbacken oder Niederhaltern, die das Werkstück halten vorbeigeführt wird und anschließend in einem zweiten Schritt quer in Richtung der Niederhalter bewegt wird, um am Werkstück einen Umformwinkel größer als 90 ° bewirken zu können. Da dies mit einer einfachen Geradführung der Biegewange nicht möglich ist, weisen Schwenkbiegemaschinen aufwändige und komplizierte Führungen und Antriebe auf, um solche kombinierten Bewegungen der Biegewange ausführen zu können. Diese Komplexität des Biegewangenantriebes bringt auch häufig Einschränkungen der möglichen Biegeschenkellängen und der bearbeitbaren Werkstückdicke.This requires that a bending edge arranged on the bending cheek of a swivel press brake be moved in a first step at a distance at jaws or holddowns, which is the workpiece hold and then in a second step is moved transversely in the direction of the hold-down to form a forming angle on the workpiece to be able to effect as 90 °. Since this is not possible with a simple straight guide of the bending beam, have folding machines on consuming and complicated guides and drives in order to perform such combined movements of the bending cheek can. This complexity of the bending-beam drive also often brings limitations of the possible bending length and the machinable workpiece thickness.

Die Aufgabe der Erfindung besteht darin, eine Biegepresse bereitzustellen, die die Vorteile des bekannten Schwenkbiegeverfahrens aufweist, jedoch einen einfachen Aufbau aufweist und die genannten Einschränkungen nur in geringerem Umfang aufweist.The object of the invention is to provide a bending press which has the advantages of the known pivoting bending method, but has a simple structure and has the said limitations only to a lesser extent.

Die Aufgabe der Erfindung wird durch eine gattungsgemäße Biegepresse gelöst, bei der die Biegebalkenführung als Linearführung ausgeführt ist und eine geradlinige Bewegungsbahn der Biegekante bewirkt und die Umformkanten beider Klemmbacken mittels einer Querführung der Klemmbalken und eines Verstellantriebes entlang eines Verstellweges verstellbar sind, der sich an die Bewegungsbahn der Biegekante annähert. Diese Relativbewegung der Klemmbalken quer zur Bewegungsbahn des Biegebalkens kann dabei rechtwinkelig oder schräg zur Bewegungsbahn des Biegebalkens erfolgen. Bei einer derartigen Biegepresse wird die komplizierte Bewegung der Biegewange einer Schwenkbiegepresse relativ zu den feststehenden Klemmbacken, die das Werkstück halten, durch eine Kombination einfacher Bewegungen des Biegebalkens und der Klemmbacken ersetzt. Dass das Werkstück in diesem Fall mit den Klemmbacken mitbewegt werden muss, fällt als Nachteil viel weniger ins Gewicht, als die dadurch erzielten Vorteile. Die Querführung der Klemmbacken bzw. der diese tragenden Klemmbalken kann baulich sehr einfach ausgeführt sein, ebenso wie die Geradführung des Biegebalkens.The object of the invention is achieved by a generic bending press, in which the bending beam guide is designed as a linear guide and a rectilinear trajectory of the bending edge causes and the forming edges of both jaws are adjustable by means of a transverse guide the clamping bar and an adjustment along an adjustment, which is connected to the trajectory approximates the bending edge. This relative movement of Clamping bar transversely to the movement path of the bending beam can be done at right angles or obliquely to the movement path of the bending beam. In such a bending press, the complicated movement of the bending cheek of a swing bending press relative to the fixed jaws holding the workpiece is replaced by a combination of simple movements of the bending beam and the jaws. The fact that the workpiece has to be moved with the jaws in this case, as a disadvantage much less significant than the advantages achieved thereby. The transverse guidance of the jaws or the latter carrying the clamping bar can be structurally very simple, as well as the linear guide of the bending beam.

Die Geradführung des Biegebalkens ist dabei vorzugsweise in vertikaler Richtung orientiert, es sind jedoch auch Ausführungsformen möglich, bei denen die Geradführung schräg zur vertikalen Richtung oder auch horizontal verläuft.The straight guide of the bending beam is preferably oriented in the vertical direction, but there are also embodiments possible in which the straight guide obliquely to the vertical direction or horizontally.

Die Führung der Klemmbalken muss dabei nicht zwingend geradlinig sein, sondern kann auch eine Bewegung in Form einer Kurve bewirken, die sich der geradlinigen Bewegungsbahn des Biegebalkens annähert. Beispielsweise kann eine Bewegung der Klemmbalken entlang eines Teiles einer Kreisbahn erfolgen.The leadership of the clamping bar does not necessarily have to be rectilinear, but can also cause a movement in the form of a curve that approximates the linear trajectory of the bending beam. For example, a movement of the clamping bar along a part of a circular path can take place.

Eine Ausführungsform mit geringem zusätzlichem Aufwand für die parallele Verstellbarkeit der beiden Klemmbalken wird erzielt, wenn die Querführung die Klemmbalkenführung des zweiten Klemmbalkens und eine davon baulich getrennte Klemmbalkenführung des ersten Klemmbalkens umfasst, wobei die Verstellwege der Klemmbalken zueinander parallel verlaufen. Da eine Klemmbalkenführung und ein Klemmbalkenantrieb ohnehin für die Durchführung des Klemmvorganges erforderlich ist, kann diese in dieser speziellen Ausführungsform vorteilhaft auch für die Zwecke der Querführung eingesetzt werden. Die Klemmbalkenführung des ersten Klemmbalkens kann baulich einfach gleich aufgebaut sein, wie die Klemmbalkenführung des zweiten Klemmbalkens.An embodiment with little additional effort for the parallel adjustability of the two clamping bars is achieved when the transverse guide comprises the clamping bar guide of the second clamping bar and one of them structurally separate clamping bar guide of the first clamping bar, the adjustment paths of the clamping bar parallel to each other. Since a clamping bar guide and a clamping bar drive is required in any case for carrying out the clamping operation, it can be advantageously used in this specific embodiment also for the purposes of transverse guidance. The clamping bar guide of the first clamping bar can be constructed structurally simple the same as the clamping bar guide of the second clamping bar.

Eine Ausführungsform, die für die Querverstellung nur geringe Verstellkräfte erfordert, wird erzielt, wenn die Klemmbalkenführungen als zueinander parallele Geradführungen ausgebildet sind und in einem Schrägungswinkel, insbesondere zwischen 10° und 30°, zur Biegewangenführung verlaufen. Bei Vernachlässigung von Reibungseinflüssen ergibt sich bei einem Schrägungswinkel von 30° eine gegenüber der Verstellkraft in Richtung der Klemmbackenführung eine doppelt so große Kraftkomponente für die Querverstellung.An embodiment which requires only small adjustment forces for the transverse adjustment, is achieved when the clamping bar guides are formed as mutually parallel linear guides and extend in a helix angle, in particular between 10 ° and 30 °, to the bending guide. Neglecting the effects of friction results in a Helix angle of 30 ° with respect to the adjusting force in the direction of the jaw guide a twice as large force component for the transverse adjustment.

Eine alternative Bauform der Biegepresse besteht darin, dass die Querführung der Klemmbalken etwa rechtwinkelig zur Biegebalkenführung verläuft. Hierdurch ist eine klare Trennung von Klemmbalkenführung und Klemmbalkenantrieb einerseits und Querführung mit Verstellantrieb andererseits gegeben. Die jeweiligen Führungen und Antriebe können dadurch für die jeweilige Anforderung optimiert ausgelegt werden. Die Querführung und der Verstellantrieb erfordern im Gegensatz zum Klemmbalken nur einen geringen Arbeitsweg, weshalb dazu unterschiedlichste bauliche Lösungen gewählt werden können, wie z.B. Linearführungen, Exzenterführungen usw.An alternative design of the bending press is that the transverse guide of the clamping bar runs approximately at right angles to the bending beam guide. As a result, a clear separation of clamping bar guide and clamping bar drive on the one hand and transverse guide with adjustment on the other hand given. The respective guides and drives can be designed optimized for the respective requirement. The transverse guide and the adjustment require in contrast to the clamping bar only a small work path, which is why a variety of structural solutions can be chosen, such. Linear guides, eccentric guides, etc.

Eine stabile Synchronisierung der Bewegung der beiden Klemmbalken wird erzielt, wenn die Klemmbalkenführungen an einem Klemmbalkenrahmen angeordnet sind, der gegenüber dem Maschinenrahmen mittels der Querführung und des Verstellantriebes quer, also rechtwinkelig oder schräg zur Bewegungsbahn der Biegekante verstellbar ist. Allfällige Unterschiede in den Bewegungen der Klemmbalken durch zwei getrennte auf den Klemmbalkenrahmen wirkende Antriebe können dadurch vermieden werden, wenn zur Verstellung des Klemmbalkenrahmens ein gemeinsamer zentraler Verstellantrieb vorgesehen wird.A stable synchronization of the movement of the two clamping bars is achieved when the clamping bar guides are arranged on a clamping bar frame, which is adjustable relative to the machine frame by means of the transverse guide and the adjusting transversely, ie at right angles or obliquely to the trajectory of the bending edge. Any differences in the movements of the clamping bar by two separate acting on the clamping bar frame drives can be avoided if a common central adjustment is provided for adjusting the clamping bar frame.

Eine montagefreundliche Ausführungsform einer Biegepresse wird erzielt, wenn die Biegebalkenführung an einem ersten Rahmenteil, insbesondere O-Rahmen, sowie die Klemmbalkenführung und die Querführung an einem dazu distanzierten zweiten Rahmenteil, insbesondere O-Rahmen, angeordnet sind. Die beiden O-Rahmen sind dabei durch geeignete Seitenständer verbunden.An assembly-friendly embodiment of a bending press is achieved when the bending beam guide on a first frame part, in particular O-frame, and the clamping bar guide and the transverse guide on a second thereto spaced second frame part, in particular O-frame are arranged. The two O-frames are connected by suitable side stands.

Eine schlanke und materialsparende Ausführungsform einer Biegepresse ist gegeben, wenn die Biegebalkenführung sowie die Klemmbackenführung und die Querführung an gegenüberliegenden Außenseiten eines zentralen Rahmenteils, insbesondere eines O-Rahmens, angeordnet sind. Der Kraftfluss zwischen Biegebalken und Klemmbalken erfolgt in diesem Fall auf kurzem Wege direkt über den zentralen Rahmenteil.A slim and material-saving embodiment of a bending press is provided when the bending beam guide and the jaw guide and the transverse guide on opposite outer sides of a central frame part, in particular an O-frame, are arranged. The power flow between the bending beam and clamping bar in this case takes place over a short distance directly over the central frame part.

Um sowohl Positivbiegungen als auch Negativbiegungen in eine entgegengesetzte Richtung ohne Wenden des Werkstücks durchführen zu können, ist es von Vorteil, wenn am Maschinenrahmen zwei gegensinnig verstellbare Biegebalken zum Abwinkeln in entgegengesetzte Richtungen angeordnet sind.To be able to perform both positive bending and negative bending in an opposite direction without turning the workpiece, it is advantageous if two oppositely adjustable bending beam are arranged for bending in opposite directions on the machine frame.

Da jeweils immer nur ein Biegebalken zum Einsatz kommt, ist es weiters möglich, dass zwei voneinander distanzierte und gegensinnig orientierte Biegebalken an einem gemeinsamen Balkenrahmen, insbesondere O-Rahmen, angeordnet sind und dieser mittels der Biegebalkenführung geradlinig verstellbar ist. Der gemeinsame Balkenrahmen weist eine hohe Verformungssteifigkeit auf und kann sehr genau geführt werden, wodurch auch eine erhöhte Biegegenauigkeit gegeben ist.Since in each case only one bending beam is used, it is further possible that two mutually distanced and oppositely oriented bending beam are arranged on a common beam frame, in particular O-frame, and this is rectilinearly adjustable by means of the bending beam guide. The common beam frame has a high deformation stiffness and can be performed very accurately, which also gives increased bending accuracy.

Zur erleichterten Anpassung der Biegeparameter an die jeweilige Biegeaufgabe, insbesondere an die Dicke eines Werkstückes ist es von Vorteil, wenn ein Horizontalabstand zwischen Klemmbalken und Biegebalken verstellbar ist. Insbesondere bei dicken Werkstücken kann der Biegevorgang mit vergrößertem Abstand und damit mit einem längeren Hebelarm, z.B. zumindest dem dreifachen der Materialdicke des Werkstücks, eingeleitet werden, wodurch der Biegeantrieb geschont werden kann bzw. kleiner ausgelegt werden kann.To facilitate adaptation of the bending parameters to the respective bending task, in particular to the thickness of a workpiece, it is advantageous if a horizontal distance between the clamping bar and the bending beam is adjustable. Particularly in the case of thick workpieces, the bending process can be carried out at an increased distance and thus with a longer lever arm, e.g. at least three times the material thickness of the workpiece to be introduced, whereby the bending drive can be spared or can be made smaller.

Die flexible Einsetzbarkeit einer Biegepresse wird wesentlich erhöht, wenn die Umformkanten an den Klemmbacken und/oder die Biegekante am Biegebalken aus Werkzeugsegmenten in Form von Biegewerkzeugen und Klemmwerkzeugen zusammengesetzt sind und dadurch auf einfache Weise unterschiedliche Längen der Biegekante bzw. der Umformkanten realisiert werden können. Dazu erforderliche Rüstvorgänge können z.B. mit Spindeln zur Werkzeugbewegung auch automatisiert erfolgen.The flexible applicability of a bending press is substantially increased if the forming edges on the jaws and / or the bending edge on the bending beam from tool segments in the form of bending tools and clamping tools are assembled and thereby easily different lengths of the bending edge or the Umformkanten can be realized. For this required setup operations can e.g. also be automated with spindles for tool movement.

Um auch groß dimensionierte Werkstücke problemlos der Biegepresse zuführen zu können und gebogene Werkstücke einfach wieder aus der Biegepresse entnehmen zu können ist es von Vorteil, wenn im Maschinenrahmen zwischen den Klemmbalken und dem bzw. den Biegebalken eine freie Durchgangsöffnung für ein Werkstück ausgebildet ist. Dadurch kann gewissermaßen im Durchlauf gebogen werden, da Werkstücke nicht wieder auf der Zuführungseite entnommen werden müssen.In order to be able to easily feed large workpieces of the bending press and curved workpieces can be removed easily from the bending press, it is advantageous if the machine frame between the clamping bar and the bending beam or a free through hole is formed for a workpiece. As a result, it can be bent in a certain way in the pass, because workpieces do not have to be removed again on the feed side.

Die Aufgabe der Erfindung wird weiters durch ein Verfahren zum Umformen eines Werkstücks gelöst, bei dem dieses zwischen einer ersten Klemmbacke mit einer ersten Umformkante und einer zweiten Klemmbacke mit einer zweiten Umformkante so geklemmt wird, dass ein Teilabschnitt zwischen den Umformkanten hervorragt und anschließend eine Biegekante eines verstellbaren Biegebalkens in einem Abstand an den Umformkanten vorbeigeführt wird, wodurch der Teilabschnitt relativ zu dem zwischen den Klemmbacken geklemmten Teil des Werkstücks abgewinkelt wird. Erfindungsgemäß wird die Biegekante beim Abwinkeln entlang einer geradlinigen Bewegungsbahn geführt und wird nachdem die Biegekante die Umformkanten passiert hat diese entlang eines Verstellweges verstellt, der sich der Bewegungsbahn der Biegekante annähert.The object of the invention is further achieved by a method for forming a workpiece, in which this is clamped between a first jaw with a first forming edge and a second jaw with a second forming edge so that a portion protrudes between the forming edges and then a bending edge of a adjustable bending beam is guided past the Umformkanten at a distance, whereby the portion is angled relative to the clamped between the jaws part of the workpiece. According to the invention, the bending edge is guided during bending along a rectilinear trajectory and, after the bending edge has passed the forming edges, the latter has been displaced along an adjustment path which approaches the trajectory of the bending edge.

Eine einfach durchführbare Variante des Verfahren besteht darin, dass nachdem die Biegekante die Umformkanten passiert hat, die Verstellbewegung der Biegekante weitgehend oder vollständig angehalten wird und gleichzeitig oder unmittelbar daran anschließend die Umformkanten in einem rechten Winkel quer an oder quer über die Bewegungsbahn der Biegekante geführt werden. In diesem Fall benötigt die untere Klemmbacke bzw. der untere Klemmbalken keine Verstellbarkeit in vertikaler Richtung und ist eine Vertikalverstellung des Werkstücks während des Umformvorgangs nicht erforderlich.An easily practicable variant of the method is that after the bending edge has passed the Umformkanten, the adjustment of the bending edge is largely or completely stopped and simultaneously or immediately thereafter the Umformkanten are guided at a right angle to or across the trajectory of the bending edge , In this case, the lower jaw or the lower clamping bar requires no adjustability in the vertical direction and a vertical adjustment of the workpiece during the forming process is not required.

Eine alternative Ausführungsform des Verfahrens kann darin bestehen, dass nachdem die Biegekante die Umformkanten passiert hat, die Umformkanten in einem Schrägungswinkel quer an oder quer über die Bewegungsbahn der Biegekante geführt werden und die Verstellbewegung der Biegekante gekoppelt mit der Bewegung der Umformkanten bis zum Abschluss des Umformvorganges fortgesetzt wird. Die Querführung der Klemmbalken kann in diesem Fall allein durch zwei parallele Klemmbalkenführungen bewerkstelligt werden.An alternative embodiment of the method may be that after the bending edge has passed the forming edges, the forming edges are guided at a skew angle transversely to or across the trajectory of the bending edge and the adjustment of the bending edge coupled with the movement of Umformkanten until the completion of the forming process will continue. The transverse guidance of the clamping bar can be accomplished in this case solely by two parallel clamping bar guides.

Zum besseren Verständnis der Erfindung wird diese anhand der nachfolgenden Figuren näher erläutert.For a better understanding of the invention, this will be explained in more detail with reference to the following figures.

Es zeigen jeweils in stark vereinfachter, schematischer Darstellung:

Fig. 1
das Verfahren zum Umformen eines Werkstückes vor Beginn des Umformvorganges;
Fig. 2
das Verfahren zum Umformen eines Werkstückes am Ende des Umformvorganges;
Fig. 3
eine Ansicht einer möglichen Ausführungsform einer erfindungsgemäßen Biegepresse;
Fig. 4
eine Schnittdarstellung einer möglichen Ausführungsform einer Biegepresse;
Fig. 5
eine Schnittdarstellung einer weiteren möglichen Ausführungsform einer Biegepresse;
Fig. 6
eine Schnittdarstellung einer weiteren möglichen Ausführungsform einer Biegepresse.
In each case, in a highly simplified, schematic representation:
Fig. 1
the method for forming a workpiece before the beginning of the forming process;
Fig. 2
the method for forming a workpiece at the end of the forming process;
Fig. 3
a view of a possible embodiment of a bending press according to the invention;
Fig. 4
a sectional view of a possible embodiment of a bending press;
Fig. 5
a sectional view of another possible embodiment of a bending press;
Fig. 6
a sectional view of another possible embodiment of a bending press.

In den Fig. 1 und 2 ist das erfindungsgemäße Verfahren zum Umformen eines Werkstückes 1 dargestellt, wobei in Fig. 1 der Zustand vor Beginn des Umformvorganges und in Fig. 2 der Zustand am Ende des Umformvorganges dargestellt ist. Es handelt sich dabei um eine spezielle Ausführungsform des als Schwenkbiegen bekannten Umformverfahrens.In the Fig. 1 and 2 the inventive method for forming a workpiece 1 is shown, wherein in Fig. 1 the state before the beginning of the forming process and in Fig. 2 the state is shown at the end of the forming process. It is a special embodiment of the known as swivel bending forming process.

Dabei wird das Werkstück 1 zwischen einer ersten Klemmbacke 2 und einer zweiten Klemmbacke 3 geklemmt, sodass ein Teilabschnitt 4 beim anschließenden Umformvorgang gegenüber dem restlichen Werkstück 1 abgewinkelt werden kann. Das Werkstück 1 besteht dabei aus zumindest abschnittsweise ebenem Material, das für eine Biegeumformung geeignet ist. An der Klemmbacke 2 ist eine Umformkante 5 ausgebildet, die wirksam wird, wenn der Teilabschnitt 4 nach unten abgewinkelt wird, und ist an der zweiten Klemmbacke 3 eine zweite Umformkante 6 ausgebildet, die wirksam wird, wenn der Teilabschnitt 4 nach oben abgewinkelt wird. Im dargestellten Ausführungsbeispiel besitzen die Klemmbacken 2, 3 einen schuhähnlichen Querschnitt, wodurch ein Werkstück 1 über die Umformkanten 5, 6 über einen rechten Winkel hinaus gebogen werden kann. Das Abwinkeln des Teilabschnitts 4 erfolgt mittels eines Biegebalkens 7, der eine Biegekante 8 aufweist. In Fig. 1 und 2 ist dabei ein Biegebalken 7 mit einer Biegekante 8 dargestellt, der für ein Abwinkeln des Teilabschnittes 4 nach unten vorgesehen ist.In this case, the workpiece 1 is clamped between a first clamping jaw 2 and a second clamping jaw 3, so that a partial section 4 can be angled relative to the remaining workpiece 1 during the subsequent forming process. The workpiece 1 consists of at least partially planar material that is suitable for a bending deformation. On the jaw 2 a forming edge 5 is formed, which is effective when the portion 4 is angled downwards, and is formed on the second jaw 3, a second forming edge 6, which is effective when the portion 4 is angled upward. In the illustrated embodiment, the jaws 2, 3 have a shoe-like cross-section, whereby a workpiece 1 on the Umformkanten 5, 6 can be bent beyond a right angle. The bending of the section 4 by means of a bending beam 7, which has a bending edge 8. In Fig. 1 and 2 In this case, a bending beam 7 is shown with a bending edge 8, which is provided for an angling of the section 4 down.

Die Umformkanten 5, 6 sind dabei mit einem Radius versehen, der auch den kleinstmöglichen Innenradius des gebogenen Werkstückes an der Umformstelle beeinflusst.The forming edges 5, 6 are provided with a radius which also influences the smallest possible inner radius of the bent workpiece at the forming point.

Beim Umformvorgang wird der Biegebalken 7 etwa rechtwinkelig zu einer horizontalen Werkstückebene 9 nach unten bewegt, wobei die Biegekante 8 einen horizontalen Abstand 10 zu den Umformkanten 5, 6 aufweist.During the forming process, the bending beam 7 is moved approximately at right angles to a horizontal workpiece plane 9 downward, wherein the bending edge 8 has a horizontal distance 10 to the forming edges 5, 6.

Der Abstand 10 ist dabei zumindest so groß wie eine Werkstückdicke 11 gewählt, und beträgt vorzugsweise das 1,5 -fache bis zum 8 -fachen der Werkstückdicke 11. Insbesondere bei dicken Werkstücken 1 kann ein größerer Abstand 10 die Einleitung des Umformvorganges durch eine bessere Hebelwirkung erleichtern.The distance 10 is at least as large as a workpiece thickness 11 selected, and is preferably 1.5 times to 8 times the workpiece thickness 11. Especially with thick workpieces 1, a greater distance 10, the initiation of the forming process by better leverage facilitate.

Beim erfindungsgemäßen Umformverfahren wird die Biegekante 8 entlang einer geradlinigen Bewegungsbahn 12 geführt, auch nachdem sie die beiden Umformkanten 5 und 6 passiert hat und dadurch der Teilabschnitt 4 in eine abgewinkelte Stellung gebracht ist. Bei feststehenden Klemmbacken 2, 3 kann mit einer derartigen geradlinigen Bewegungsbahn 12 der Biegekante 8 der Teilabschnitt 4 maximal bis zu 90° abgewinkelt werden, wenn ein Abstand 10 gewählt wird, welcher etwa der Werkstückdicke 11 entspricht, durch eine unvermeidbare Rückfederung nach Entfernung der Biegekante 8 kann dadurch mit der geradlinigen Bewegung der Biegekante 8 nur ein Umformwinkel kleiner als 90° erzielt werden. Bei den aus dem Stand der Technik bekannten Umformverfahren wird deshalb der Biegebalken 7 mit der Biegekante 8 nach dem Passieren der Umformkanten 5, 6 abweichend von der geradlinigen Bewegungsbahn 12 mit einer Bewegungskomponente parallel zur Werkstückebene 9 an die Klemmbacken 2, 3 weiterbewegt, wodurch der Teilabschnitt 4 über einen Umformwinkel von 90° hinaus umgeformt werden kann. Dies erfordert, dass die Führung des Biegebalkens 7 sowohl in vertikaler Richtung als auch in horizontaler Richtung Bewegungen zulassen muss.In the forming process according to the invention, the bending edge 8 is guided along a rectilinear trajectory 12, even after it has passed the two forming edges 5 and 6 and thereby the portion 4 is brought into an angled position. With fixed clamping jaws 2, 3, with such a linear trajectory 12 of the bending edge 8 of the section 4 can be angled up to 90 ° maximum, if a distance 10 is selected, which corresponds approximately to the workpiece thickness 11, by an unavoidable springback after removal of the bending edge. 8 can thus be achieved with the rectilinear movement of the bending edge 8 only a deformation angle smaller than 90 °. In the forming methods known from the prior art, therefore, the bending beam 7 with the bending edge 8 after passing through the Umformkanten 5, 6 deviating from the rectilinear trajectory 12 with a movement component parallel to the workpiece plane 9 to the jaws 2, 3, whereby the subsection 4 can be formed over a deformation angle of 90 ° beyond. This requires that the guidance of the bending beam 7 must allow movements both in the vertical direction and in the horizontal direction.

Im Gegensatz zu diesem aus dem Stand der Technik bekannten Verfahren, verbleibt beim erfindungsgemäßen Verfahren die Biegekante 8 auch nach dem Passieren der Umformkante 5, 6 auf ihrer geradlinigen Bewegungsbahn 12, und wird ein Abwinkeln des Teilabschnittes 4 über 90° hinaus dadurch bewirkt, dass die Umformkanten 5, 6 beider Klemmbacken 2, 3 zusammen mit dem geklemmten Werkstück 1 entlang eines Verstellweges 13 verstellt werden, der sich an die Bewegungsbahn 12 der Biegekante 8 annähert und in Fig. 2 durch einen Pfeil dargestellt ist.In contrast to this method known from the prior art, in the method according to the invention, the bending edge 8 remains even after passing through the forming edge 5, 6 on its rectilinear trajectory 12, and an angling of the portion 4 is caused beyond 90 °, that the Forming edges 5, 6 of both clamping jaws 2, 3 are adjusted together with the clamped workpiece 1 along an adjustment path 13, which approximates the trajectory 12 of the bending edge 8 and in Fig. 2 is shown by an arrow.

Während also bei dem bekannten Umformverfahren des Schwenkbiegens der Biegebalken 7 eine vergleichsweise komplizierte Bewegung ausführen muss, um eine abgewinkelte Bewegung der Biegekante relativ zu den Umformkanten 5, 6 zu erzielen, ist es beim erfindungsgemäßen Verfahren dadurch vereinfacht, dass der Biegebalken 7 und die Klemmbacken 2, 3 lediglich gerade Bewegungsbahnen zurück legen müssen, wodurch die dazu erforderlichen Führungen baulich einfach aufgebaut sind.Thus, while in the known forming method of the pivoting bending of the bending beam 7 must perform a relatively complicated movement to achieve an angled movement of the bending edge relative to the Umformkanten 5, 6, it is simplified in the process according to the invention characterized in that the bending beam 7 and the jaws. 2 , 3 only just trajectories must put back, making the necessary guides structurally simple.

Das von der Biegekante 8 in nach unten abgewinkelte Werkstück 1 vor der Querbewegung der Klemmkanten 5, 6 ist in Fig. mit strichlierten Linien angedeutet. Die nachfolgende Verringerung des Abstandes 10 zwischen Klemmbacken 2, 3 und dem Biegebalken 7 bzw. den Umformkanten 5, 6 und der Biegekante 8 nach dem Passieren der Umformkanten 5, 6 ergibt sich demnach aus einer quer zur geradlinigen Bewegungsbahn 12 verlaufenden Relativbewegung zwischen den Klemmbacken 2, 3 und dem Biegebalken 7. Dabei ist möglich, dass bei dieser Relativbewegung der Biegebalken 7 sich im Stillstand befindet und lediglich die Klemmbacken 2, 3 mit dem geklemmten Werkstück 1 bewegt werden, es ist jedoch auch möglich, dass die geradlinige Bewegung der Biegekante 8 entlang der Bewegungsbahn 12 fortgesetzt wird und gleichzeitig die Klemmbacken 2, 3 entlang eines quer zur Bewegungsbahn 12 verlaufenden Verstellweges verstellt werden, wodurch sich eine rechtwinkelige oder schräge Relativbewegung zwischen Biegebalken 7 und Klemmbacken 2, 3 ergibt. Der Verstellweg 13 der Klemmbacken 2, 3 ist demnach nicht zwingend rechtwinkelig zur Bewegungsbahn 12 der Biegekante 8 orientiert, sondern kann auch schräg zu dieser entlang einer geraden Linie oder auch entlang einer zur Bewegungsbahn 12 schräg verlaufenden Kurvenbahn, zum Beispiel Kreisbahn verlaufen. In Fig. 2 ist mit strichliertem Pfeil ein derartiger, kurvenförmiger Verstellweg 14 dargestellt, der beispielsweise mit Hilfe einer Exzenterlagerung der Klemmbacken 2, 3 bzw. der diese tragenden Maschinenteile erzeugt werden kann.The workpiece 1 that is angled downwards from the bending edge 8 in front of the transverse movement of the clamping edges 5, 6 is indicated by dashed lines in FIG. The subsequent reduction of the distance 10 between clamping jaws 2, 3 and the bending beam 7 and the forming edges 5, 6 and the bending edge 8 after passing through the Umformkanten 5, 6 results accordingly from a transverse to the rectilinear trajectory 12 relative movement between the jaws. 2 It is possible that during this relative movement of the bending beam 7 is at a standstill and only the jaws 2, 3 are moved with the clamped workpiece 1, but it is also possible that the rectilinear movement of the bending edge. 8 is continued along the trajectory 12 and at the same time the jaws 2, 3 are adjusted along a transverse to the movement path 12 adjusting, whereby a rectangular or oblique relative movement between the bending beam 7 and jaws 2, 3 results. Accordingly, the adjustment path 13 of the clamping jaws 2, 3 is not necessarily oriented at right angles to the movement path 12 of the bending edge 8, but may also run obliquely to it along a straight line or along a curved path, for example a circular path, which runs obliquely to the movement path 12. In Fig. 2 is shown with dotted arrow such a curved adjustment path 14, which can be generated for example by means of an Exzenterlagerung the jaws 2, 3 or the machine parts carrying these.

In den Fig. 1 und 2 ist weiters mit einem Doppelpfeil die Klemmbewegung 15 der Klemmbacke 3 relativ zur Klemmbacke 2 dargestellt. Eine alternative Ausführungsform des Verfahrens ist ebenfalls in Fig. 2 angedeutet, bei dem der Biegebalken 7 eine von der vertikalen Richtung abweichende jedoch wieder geradlinige mit strichliertem Pfeil angedeutete Bewegungsbahn 16 entlang bewegt wird und die Klemmbacken 2, 3 zusammen mit dem geklemmten Werkstück 1 einen gegenüber der vertikalen Richtung schrägen Verstellweg 17 durchfahren. Die Verstellbewegungen des Biegebalkens 7 und der Klemmbacken 2, 3 können dabei von einer Steuerungsvorrichtung so gekoppelt werden, dass sich eine für den Umformvorgang optimale Relativbewegung ergibt.In the Fig. 1 and 2 is further shown with a double arrow, the clamping movement 15 of the jaw 3 relative to the jaw 2. An alternative embodiment of the method is also in Fig. 2 indicated, in which the bending beam 7 a deviating from the vertical direction, but again straight with dashed arrow indicated trajectory 16 is moved along and the jaws 2, 3 pass through with the clamped workpiece 1 a relation to the vertical direction oblique adjustment 17. The adjusting movements of the bending beam 7 and the clamping jaws 2, 3 can be coupled by a control device so that there is an optimal relative to the forming process relative movement.

Fig. 3 zeigt eine Rückansicht einer erfindungsgemäßen Biegepresse 18 mit der das anhand der Fig. 1 und 2 beschriebene Umformverfahren ausgeführt werden kann. Fig. 3 shows a rear view of a bending press 18 according to the invention with the basis of the Fig. 1 and 2 described forming process can be performed.

Die Biegepresse 18 umfasst einen Maschinenrahmen 19, in dem der bereits anhand von Fig. 1 und 2 beschriebene, verstellbare Biegebalken 7 sowie zwei die Klemmbacken 2, 3 tragenden Klemmbalken verstellbar gelagert sind. Der dargestellte Maschinenrahmen 19 umfasst an seiner Vorderseite 20 einen plattenförmigen O-Rahmen 21 und an seiner Rückseite 22 ebenfalls einen plattenförmigen O-Rahmen 23. Die Ausnehmungen in den O-Rahmen 21 und 23 bilden eine Durchgangsöffnung 24, die sich durch die Biegepresse 18 hindurch erstreckt und das Zuführen eines Werkstücks 1 zu den Klemmbalken bzw. dem Biegebalken 7 ermöglicht und beispielsweise auch das Abführen des gebogenen Werkstücks an der Rückseite 22 ermöglicht.The bending press 18 comprises a machine frame 19, in which already with reference to Fig. 1 and 2 described, adjustable bending beam 7 and two clamping jaws 2, 3 supporting clamping beams are mounted adjustable. The illustrated machine frame 19 comprises at its front side 20 a plate-shaped O-frame 21 and at its rear side 22 likewise a plate-shaped O-frame 23. The recesses in the O-frames 21 and 23 form a passage opening 24 which extends through the bending press 18 extends and allows the feeding of a workpiece 1 to the clamping bar or the bending beam 7 and, for example, also allows the discharge of the bent workpiece on the back 22.

An der Vorderseite 20 der Biegepresse 18 ist im dargestellten Ausführungsbeispiel eine Auflagevorrichtung 25 angeordnet, die den außerhalb der Biegepresse 18 befindlichen Teil eines Werkstücks 1 tragen kann und optional auch zusätzlich die von den Klemmbacken 2, 3 mit dem geklemmten Werkstück 1 ausgeführten Bewegungen synchron nachfährt, um unerwünschte Werkstückverformungen zu vermeiden. Diese Verstellmöglichkeit der Auflagevorrichtung 25 ist in Fig. 3 durch Doppelpfeile in die Hauptkoordinatenrichtungen angedeutet.On the front side 20 of the bending press 18, a support device 25 is arranged in the illustrated embodiment, which can carry the outside of the bending press 18 located part of a workpiece 1 and optionally also in addition to the running of the jaws 2, 3 with the clamped workpiece 1 movements synchronously, to avoid unwanted work piece deformations. This adjustment of the support device 25 is in Fig. 3 indicated by double arrows in the main coordinate directions.

Der Maschinenrahmen 19 umfasst weiters Seitenständer, die im dargestellten Ausführungsbeispiel die beiden O-Rahmen 21, 23 verbinden. Zwischenräume zwischen tragenden Bestandteilen des Maschinenrahmens 19 können dabei durch Abdeckungen verschlossen sein, wodurch ein weitgehend geschlossenes Maschinenäußeres gegeben ist.The machine frame 19 further comprises side stand, which connect the two O-frames 21, 23 in the illustrated embodiment. Gaps between structural components of the machine frame 19 may be closed by covers, whereby a largely closed machine exterior is given.

Fig. 4 zeigt einen Querschnitt durch eine weitere Ausführungsform einer Biegepresse 18, mit der ein Werkstück 1 abgewinkelt werden kann. Fig. 4 shows a cross section through a further embodiment of a bending press 18, with which a workpiece 1 can be angled.

Ein Werkstück 1 kann dazu durch eine Durchgangsöffnung 24 im Maschinenrahmen 19 in das Innere der Biegepresse 18 eingeführt werden, wo es für die Durchführung des Umformvorganges mittels einer Klemmvorrichtung 26 gehalten wird. Die Klemmvorrichtung 26 umfasst einen ersten Klemmbalken 27 der die erste Klemmbacke 2 trägt und einen zweiten Klemmbalken 28, der die zweite Klemmbacke 3 trägt. Der zweite Klemmbalken 28 ist mittels einer Klemmbalkenführung 29 und eines Klemmbalkenantriebes 30 relativ zum ersten Klemmbalken 27 verstellbar. Der erste untere Klemmbalken 27 ist in diesem Ausführungsbeispiel zu einem O-Rahmen 31 erweitert, der sich bis in die obere Hälfte der Biegepresse 21 erstreckt und den feststehenden Teil der Klemmbalkenführung 29 trägt. Diese umfasst zum Beispiel eine Linearführungsschiene, mit der der obere zweite Klemmbalken 28 in vertikaler Richtung im Maschinenrahmen 19 geführt ist. Der Klemmbalkenantrieb 30 ist im dargestellten Ausführungsbeispiel durch einen Hydraulikzylinder 32 gebildet, kann jedoch alternativ auch durch einen Spindeltrieb mit Elektromotor ausgeführt sein.A workpiece 1 can be introduced through a through hole 24 in the machine frame 19 in the interior of the bending press 18, where it is held by a clamping device 26 for carrying out the forming process. The clamping device 26 comprises a first clamping bar 27 which carries the first clamping jaw 2 and a second clamping bar 28 which carries the second clamping jaw 3. The second clamping bar 28 is adjustable relative to the first clamping bar 27 by means of a clamping bar guide 29 and a clamping bar drive 30. The first lower clamping bar 27 is extended in this embodiment to an O-frame 31 which extends into the upper half of the bending press 21 and carries the fixed part of the clamping bar guide 29. This includes, for example, a linear guide rail, with which the upper second clamping bar 28 is guided in the vertical direction in the machine frame 19. The clamping bar drive 30 is formed in the illustrated embodiment by a hydraulic cylinder 32, but may alternatively be performed by a spindle drive with electric motor.

Der verstellbare Biegebalken 7 ist mittels einer Biegebalkenführung 33 in Form einer Linearführung 34 verstellbar am Maschinenrahmen 19 gelagert und wird von einem Biegebalkenantrieb 35, hier in Form eines Hydraulikzylinders 36, angetrieben. Die Biegekante 8 am unteren Ende des Biegebalkens beschreibt eine geradlinige Bewegungsbahn 12 (siehe Fig. 1, 2), die im dargestellten Ausführungsbeispiel in vertikaler Richtung verläuft. Mittels einer schrägen Biegebalkenführung 33 könnte auch eine von der vertikalen Richtung abweichende Bewegungsbahn 12 möglich sein. Wie in Fig. 4 weiters dargestellt ist, kann die Biegekante 8 von einem am Biegebalken 7 auswechselbar befestigten Biegewerkzeug 37 gebildet sein. Weiters kann die Biegekante 8 in ihrer Länge durch Aneinanderreihung von derartigen Biegewerkzeugen 37 an die erforderliche Biegeaufgabe angepasst werden.The adjustable bending beam 7 is mounted by means of a bending beam guide 33 in the form of a linear guide 34 adjustable on the machine frame 19 and is driven by a bending beam drive 35, here in the form of a hydraulic cylinder 36. The bending edge 8 at the lower end of the bending beam describes a rectilinear trajectory 12 (see Fig. 1, 2 ), which runs in the illustrated embodiment in the vertical direction. By means of an oblique bending beam guide 33, a movement path 12 deviating from the vertical direction could also be possible. As in Fig. 4 Furthermore, the bending edge 8 may be formed by a bending tool 37 removably mounted on the bending beam 7. Furthermore, the bending edge 8 can be adjusted in length by juxtaposition of such bending tools 37 to the required bending task.

In Fig. 4 ist weiters mit strichlierten Linien angedeutet, dass unterhalb des ersten Biegebalkens 7 ein weiterer Biegebalken 38 mit einer weiteren Biegekante 39 vorgesehen sein kann, mit der ein Werkstück 1 auch nach oben abgewinkelt werden kann. Auf die Darstellung der Biegebalkenführung und des Biegebalkenantriebes wird aus Gründen der Übersichtlichkeit an dieser Stelle verzichtet.In Fig. 4 is further indicated by dashed lines that below the first bending beam 7, a further bending beam 38 may be provided with a further bending edge 39, with a workpiece 1 can also be angled upwards. On the presentation of the bending beam guide and the bending beam drive is omitted for reasons of clarity at this point.

Um das anhand der Fig. 1 und 2 bereits beschriebene Biegeverfahren durchführen zu können, sind die die Klemmbacken 2, 3 tragenden Klemmbalken 27 und 28 mittels einer Querführung 40 und eines Verstellantriebes 41 relativ zum Maschinenrahmen 19 in horizontaler Richtung verstellbar gelagert. Durch diese Verstellbarkeit kann ein mit Hilfe des Biegebalkens 7 bzw. der Biegekante 8 abgewinkelter Teilabschnitt des Werkstücks 1 über einen Umformwinkel von größer als 90° abgewinkelt werden.To that on the basis of Fig. 1 and 2 already described bending process 27 and 28 are mounted by means of a transverse guide 40 and an adjustment 41 relative to the machine frame 19 in the horizontal direction adjustable. As a result of this adjustability, a section of the workpiece 1 angled off with the aid of the bending beam 7 or the bending edge 8 can be angled over a deformation angle of greater than 90 °.

Der Verstellantrieb 41 stützt sich dabei einerseits am Maschinenrahmen 19 und andererseits am O-Rahmen 31 ab, der mit dem unteren Klemmbalken 27 und über die Klemmbalkenführung 29 mit dem oberen Klemmbalken 28 verbunden ist. Der O-Rahmen 31 ist an seiner Unterseite und seiner Oberseite über die Querführung 40 am Maschinenrahmen 19 geführt, wobei als Querführung 40 im dargestellten Ausführungsbeispiel eine Linearführung vorgesehen ist. Alternativ zu dieser Ausführungsform wäre auch eine Querführung 40 mittels Exzenterlagerung am Maschinenrahmen 19 möglich, wodurch ein in Fig. 2 bereits dargestellter, kreisbogenförmiger Verstellweg 14 zur Annäherung der Klemmbacken 2, 3 an die Bewegungsbahn der Biegekante 8 möglich ist.The adjusting drive 41 is supported on the one hand on the machine frame 19 and on the other hand on the O-frame 31, which is connected to the lower clamping bar 27 and the clamping bar guide 29 with the upper clamping bar 28. The O-frame 31 is guided on its underside and its top over the transverse guide 40 on the machine frame 19, wherein as a transverse guide 40 in the illustrated embodiment, a linear guide is provided. As an alternative to this embodiment, a transverse guide 40 would also be possible by means of eccentric mounting on the machine frame 19, as a result of which an in Fig. 2 already shown, arcuate adjustment 14 for approaching the jaws 2, 3 to the path of movement of the bending edge 8 is possible.

Der Verstellantrieb 41 ist im dargestellten Ausführungsbeispiel durch zwei Hydraulikzylinder 42 realisiert, die synchronisierte Bewegungen ausführen und dadurch eine gleichmäßige Horizontalverstellung sicherstellen. In dieser Ausführungsform einer Biegepresse 18 ist von Vorteil, dass die untere Klemmbacke 2 während des Umformvorganges keine vertikale Bewegungskomponente besitzt und daher auch ein geklemmtes Werkstück 1 nur in horizontaler Richtung bewegt werden muss. Eine Vertikalverstellung einer Auflagevorrichtung 25 ist in diesem Fall nicht erforderlich.The adjusting drive 41 is realized in the illustrated embodiment by two hydraulic cylinders 42 which perform synchronized movements and thereby ensure a uniform horizontal adjustment. In this embodiment of a bending press 18 is advantageous that the lower jaw 2 has no vertical component of movement during the forming process and therefore a clamped workpiece 1 must be moved only in the horizontal direction. A vertical adjustment of a support device 25 is not required in this case.

Fig. 4 zeigt weiters, dass die Kennbacken 2, 3 aus an den Klemmbalken 27, 28 befestigten Klemmwerkzeugen 43 zusammengesetzt sein können. Fig. 4 shows further that the markers 2, 3 can be composed of attached to the clamping bar 27, 28 clamping tools 43.

In Fig. 5 ist eine weitere und gegebenenfalls für sich eigenständige Ausführungsform einer Biegepresse 18 gezeigt, wobei wiederum für gleiche Bezugszeichen bzw. Bauteilbezeichnungen wie in den vorangegangenen Fig. 1 bis 4 verwendet werden.In Fig. 5 a further and optionally independent embodiment of a bending press 18 is shown, again for the same reference numerals or component designations as in the preceding Fig. 1 to 4 be used.

In der in Fig. 5 dargestellten Ausführungsform umfasst der Maschinenrahmen 19 zwei zueinander distanzierte O-Rahmen 21 und 23, zwischen denen zusammenwirkende Klemmbalken 27 und 28 sowie die alternativ verwendeten Biegebalken 7 und 38 verstellbar gelagert angeordnet sind.In the in Fig. 5 1, the machine frame 19 comprises two O-frames 21 and 23 which are spaced apart from one another and between which cooperating clamping beams 27 and 28 and the alternatively used bending beams 7 and 38 are arranged to be adjustably mounted.

Die Biegebalken 7, 38 tragen, wie bereits anhand von Fig. 4 beschrieben, Biegewerkzeuge 37, mit denen eine für die jeweilige Biegeaufgabe angepasste Biegekante 8 bzw. 39 gebildet wird. Die Biegewerkzeuge 37 können dabei beispielsweise mittels Bewegungsspindeln 44 automatisch entlang des Biegebalkens 7, 38 geführt verstellbar sein.The bending beams 7, 38 carry, as already based on Fig. 4 Bending tools 37, with which an adapted for the respective bending task bending edge 8 or 39 is formed. The bending tools 37 can thereby be automatically guided, for example, by means of movement spindles 44 along the bending beam 7, 38.

Die Biegebalken 7 und 38 sind mittels Linearführungen 34 an der Innenseite des O-Rahmens 23 verstellbar gelagert und weiters mittels nicht dargestellten Biegebalkenantrieben 35, beispielsweise in Form von Hydraulikzylindern oder Spindeltrieben mit Elektromotor, antriebsverbunden.The bending beams 7 and 38 are adjustably mounted by means of linear guides 34 on the inside of the O-frame 23 and further driven by means not shown Biegebalkenantrieben 35, for example in the form of hydraulic cylinders or spindle drives with electric motor drive-connected.

Die die Klemmbacken 2, 3 tragenden Klemmbalken 27 und 28 sind an der Innenseite des weiteren O-Rahmens 21 gelagert, wobei die Klemmbalkenführung 29 des oberen Klemmbalkens 28 in Bezug auf die Biegebalkenführung 33 in Form der Linearführung 34 schräg angeordnet ist.The clamp jaws 2, 3 bearing clamping bar 27 and 28 are mounted on the inside of the other O-frame 21, wherein the clamping bar guide 29 of the upper clamping bar 28 with respect to the bending beam guide 33 in the form of the linear guide 34 is arranged obliquely.

Die schräg angeordnete Klemmbalkenführung 29 ist in diesem Ausführungsbeispiel Bestandteil der Querführung 40, die dazu weiters eine Klemmbalkenführung 45 des unteren Klemmbalkens 27 umfasst. Diese ist parallel zur Klemmbalkenführung 29 des oberen Klemmbalkens 28 ausgerichtet, weshalb die ein Werkstück 1 klemmenden Klemmbalken 2 und 3 exakt synchron miteinander verstellt werden können. Dazu sind in Fig. 5 nicht dargestellte Klemmbalkenantriebe vorgesehen, die beispielsweise Hydraulikzylinder oder Spindelantriebe mit Elektromotoren umfassen. Der Verstellantrieb 41 für die Klemmbalken 27 und 28 ist in dieser Ausführungsform durch die beiden synchronisierten Balkenantriebe gebildet. Alternativ dazu ist es auch möglich, die beiden Klemmbalken 27 und 28 bei dazwischen geklemmtem Werkstück 1 mechanisch gegeneinander zu verriegeln und beide Klemmbalken 27, 28 mittels lediglich eines Klemmbalkenantriebes zu verstellen, wodurch ebenfalls ein Verstellantrieb 41 für die Querbewegung der Klemmbalken 27 und 28 relativ zur Biegebalkenbewegung gebildet sein kann. Wie Fig. 5 weiters zeigt, kann am unteren Klemmbalken 27 ein Auflageelement 46 vorgesehen sein, das Bestandteil einer Auflagevorrichtung 25 für ein Werkstück 1 bildet. Die beiden O-Rahmen 21 und 23 sind über Seitenständer 47 oder andere Querverbinder miteinander verbunden, wodurch der Kraftfluss zwischen den beiden O-Rahmen 21 und 23 hergestellt ist.The obliquely arranged clamping beam guide 29 is in this embodiment part of the transverse guide 40, which further includes a clamping bar guide 45 of the lower clamping bar 27. This is aligned parallel to the clamping bar guide 29 of the upper clamping bar 28, which is why a workpiece 1 clamping clamping bars 2 and 3 can be adjusted exactly synchronously with each other. These are in Fig. 5 not shown Klemmbalkenantriebe provided, for example, include hydraulic cylinders or spindle drives with electric motors. The adjustment drive 41 for the clamping bar 27 and 28 is formed in this embodiment by the two synchronized beam drives. Alternatively, it is also possible to mechanically lock the two clamping bars 27 and 28 at clamping therebetween workpiece 1 against each other and both clamping bars 27, 28 by means of only one clamping bar drive, thereby also an adjustment 41 for the transverse movement of the clamping bar 27 and 28 relative to Bending beam movement can be formed. As Fig. 5 shows further, a support element 46 may be provided at the lower clamping bar 27 be that forms part of a support device 25 for a workpiece 1. The two O-frames 21 and 23 are interconnected via side posts 47 or other cross connectors, whereby the power flow between the two O-frames 21 and 23 is made.

Die Schrägstellung der Klemmbalkenführungen 29 und 45 kann beispielsweise durch keilförmige Distanzstücke 48 hergestellt sein, an denen Lagerschienen für die Linearführungen der Klemmbalkenführungen 29, 45 befestigt sind. Ein zwischen der Linearführung 34 der Biegebalken 7, 38 und den Klemmbalkenführungen 29, 45 bestehender Schrägungswinkel 49 beträgt insbesondere zwischen 10° und 30°.The inclination of the clamping beam guides 29 and 45 may be made for example by wedge-shaped spacers 48, on which bearing rails for the linear guides of the clamping bar guides 29, 45 are attached. An existing between the linear guide 34 of the bending beam 7, 38 and the clamping bar guides 29, 45 helix angle 49 is in particular between 10 ° and 30 °.

In Fig. 6 ist eine weitere und gegebenenfalls für sich eigenständige Ausführungsform der Biegepresse 18 gezeigt, wobei wiederum für gleiche Teile gleiche Bezugszeichen bzw. Bauteilbezeichnungen wie in den vorangegangen Fig. 1 bis 5 verwendet werden. Um unnötige Wiederholungen zu vermeiden, wird auf die detaillierte Beschreibung in den vorangegangenen Fig. 1 bis 5 hingewiesen bzw. Bezug genommen.In Fig. 6 is a further and optionally independent embodiment of the bending press 18 is shown, again for like parts, the same reference numerals or component designations as in the preceding Fig. 1 to 5 be used. In order to avoid unnecessary repetition, the detailed description in the previous ones will be used Fig. 1 to 5 referred or referred.

Die Ausführungsform gemäß Fig. 6 besitzt eine zur Ausführungsform gemäß Fig. 5 gleichartige Kinematik der Balkenbewegung, es ist jedoch zum Unterschied zu Fig. 5 ein zentraler, plattenförmiger Rahmenteil 50 vorgesehen, an dessen gegenüberliegenden Außenseiten 51 und 52 die Biegebalkenführungen 33, 34 bzw. die Klemmbalkenführungen 29 und 45 angeordnet sind. Der Kraftfluss von den Umformkanten zu der Biegekante erfolgt in dieser Ausführungsform unmittelbar über den zentralen Rahmenteil 50 und können bei dieser Ausführungsform die Seitenständer 47 aufgrund der geringeren Belastung schwächer dimensioniert werden. Bei dieser Ausführungsform ist der zentrale Rahmenteil 50 beispielsweise als O-Rahmen ausgeführt und ergibt sich sowohl vor als auch hinter den Biegewerkzeugen ein sehr großer Biegefreiraum.The embodiment according to Fig. 6 has one according to the embodiment according to Fig. 5 similar kinematics of the bar movement, but it is different from Fig. 5 a central, plate-shaped frame member 50 is provided, on whose opposite outer sides 51 and 52, the bending beam guides 33, 34 and the clamping bar guides 29 and 45 are arranged. The power flow from the Umformkanten to the bending edge takes place in this embodiment directly over the central frame member 50 and can be dimensioned weaker in this embodiment, the side stand 47 due to the lower load. In this embodiment, the central frame part 50 is embodied, for example, as an O-frame and results in a very large bending clearance both in front of and behind the bending tools.

Bei den beschriebenen Ausführungsformen ist es weiters möglich, dass zwei voneinander distanzierte und gegensinnig orientierte Biegebalken 7, 38 an einem gemeinsamen Balkenrahmen, insbesondere O-Rahmen, angeordnet sind und dieser mittels der Biegebalkenführung 33 in Form der Linearführung 34 geradlinig verstellbar ist.In the described embodiments, it is further possible that two mutually distanced and oppositely oriented bending beam 7, 38 are arranged on a common beam frame, in particular O-frame, and this is rectilinearly adjustable by means of the bending beam guide 33 in the form of linear guide 34.

Der Ordnung halber sei darauf hingewiesen, dass zum besseren Verständnis des Aufbaus der Biegepresse 18 diese bzw. deren Bestandteile teilweise unmaßstäblich und/oder vergrößert und/oder verkleinert dargestellt wurdenFor the sake of order, it should be pointed out that in order to better understand the structure of the bending press 18, these or their components have been shown partially unevenly and / or enlarged and / or reduced in size

Die Ausführungsbeispiele zeigen mögliche Ausführungsvarianten der Biegepresse 18, wobei an dieser Stelle bemerkt sei, dass die Erfindung nicht auf die speziell dargestellten Ausführungsvarianten derselben eingeschränkt ist, sondern vielmehr auch diverse Kombinationen der einzelnen Ausführungsvarianten untereinander möglich sind und diese Variationsmöglichkeit aufgrund der Lehre zum technischen Handeln durch gegenständliche Erfindung im Können des auf diesem technischen Gebiet tätigen Fachmannes liegt.The embodiments show possible embodiments of the bending press 18, which should be noted at this point that the invention is not limited to the specifically illustrated embodiments thereof, but also various combinations of the individual embodiments are possible with each other and this variation possibility due to the teaching of technical action representational invention in the skill of those skilled in this technical field.

Weiters können auch Einzelmerkmale oder Merkmalskombinationen aus den gezeigten und beschriebenen unterschiedlichen Ausführungsbeispielen für sich eigenständige, erfinderische oder erfindungsgemäße Lösungen darstellen.Furthermore, individual features or combinations of features from the different exemplary embodiments shown and described can also represent independent, inventive or inventive solutions.

Die den eigenständigen erfinderischen Lösungen zugrundeliegende Aufgabe kann der Beschreibung entnommen werden.The task underlying the independent inventive solutions can be taken from the description.

Abschließend sei festgehalten, dass in den unterschiedlich beschriebenen Ausführungsformen gleiche Teile mit gleichen Bezugszeichen bzw. gleichen Bauteilbezeichnungen versehen werden, wobei die in der gesamten Beschreibung enthaltenen Offenbarungen sinngemäß auf gleiche Teile mit gleichen Bezugszeichen bzw. gleichen Bauteilbezeichnungen übertragen werden können. Auch sind die in der Beschreibung gewählten Lageangaben, wie z.B. oben, unten, seitlich usw. auf die unmittelbar beschriebene sowie dargestellte Figur bezogen und sind diese Lageangaben bei einer Lageänderung sinngemäß auf die neue Lage zu übertragen.Finally, it should be noted that in the differently described embodiments, the same parts are provided with the same reference numerals or the same component names, the revelations contained in the entire description can be mutatis mutandis to the same parts with the same reference numerals or identical component names. Also, the location information chosen in the description, such as top, bottom, side, etc. related to the immediately described and illustrated figure and these position information in a change in position mutatis mutandis to transfer to the new location.

Sämtliche Angaben zu Wertebereichen in gegenständlicher Beschreibung sind so zu verstehen, dass diese beliebige und alle Teilbereiche daraus mitumfassen, z.B. ist die Angabe 1 bis 10 so zu verstehen, dass sämtliche Teilbereiche, ausgehend von der unteren Grenze 1 und der oberen Grenze 10 mit umfasst sind, d.h. sämtliche Teilbereiche beginnen mit einer unteren Grenze von 1 oder größer und enden bei einer oberen Grenze von 10 oder weniger, z.B. 1 bis 1,7, oder 3,2 bis 8,1, oder 5,5 bis 10.All information on ranges of values in objective description should be understood to include these arbitrary and all sub-ranges thereof, eg the indication 1 to 10 should be understood to encompass all sub-ranges, starting from the lower limit 1 and the upper limit 10 that is, all portions begin with a lower limit of 1 or greater and end at an upper limit of 10 or less, eg, 1 to 1.7, or 3.2 to 8.1, or 5.5 to 10.

Vor allem können die einzelnen in den Fig. 1, 2; 3; 4; 5; 6 gezeigten Ausführungen den Gegenstand von eigenständigen, erfindungsgemäßen Lösungen bilden. Die diesbezüglichen, erfindungsgemäßen Aufgaben und Lösungen sind den Detailbeschreibungen dieser Figuren zu entnehmen. Bezugszeichenaufstellung 1 Werkstück 31 O-Rahmen 2 Klemmbacke 32 Hydraulikzylinder 3 Klemmbacke 33 Biegebalkenführung 4 Teilabschnitt 34 Linearführung 5 Umformkante 35 Biegebalkenantrieb 6 Umformkante 36 Hydraulikzylinder 7 Biegebalken 37 Biegewerkzeug 8 Biegekante 38 Biegebalken 9 Werkstückebene 39 Biegekante 10 Abstand 40 Querführung 11 Werkstückdicke 41 Verstellantrieb 12 Bewegungsbahn 42 Hydraulikzylinder 13 Verstellweg 43 Klemmwerkzeug 14 Verstellweg 44 Spindel 15 Klemmbewegung 45 Klemmbalkenführung 16 Bewegungsbahn 46 Auflagerelement 17 Verstellweg 47 Seitenständer 18 Biegepresse 48 Distanzstück 19 Maschinenrahmen 49 Schrägungswinkel 20 Vorderseite 50 Rahmenteil 21 O-Rahmen 51 Außenseite 22 Rückseite 52 Außenseite 23 O-Rahmen 24 Durchgangsöffnung 25 Auflagevorrichtung 26 Klemmvorrichtung 27 Klemmbalken 28 Klemmbalken 29 Klemmbalkenführung 30 Klemmbalkenantrieb Above all, the individual in the Fig. 1, 2 ; 3 ; 4 ; 5 ; 6 shown embodiments form the subject of independent solutions according to the invention. The relevant objects and solutions according to the invention can be found in the detailed descriptions of these figures. <B> Reference Numbers </ b> 1 workpiece 31 O-frame 2 jaw 32 hydraulic cylinders 3 jaw 33 Bending beam guidance 4 section 34 linear guide 5 forming edge 35 Bending beam drive 6 forming edge 36 hydraulic cylinders 7 bending beams 37 bending tool 8 bending edge 38 bending beam 9 workpiece level 39 bending edge 10 distance 40 width guide 11 workpiece thickness 41 adjustment 12 trajectory 42 hydraulic cylinders 13 adjustment path 43 Tightening tool 14 adjustment path 44 spindle 15 clamping movement 45 Clamping bar guide 16 trajectory 46 Support element 17 adjustment path 47 kickstand 18 bending press 48 spacer 19 machine frame 49 helix angle 20 front side 50 frame part 21 O-frame 51 outside 22 back side 52 outside 23 O-frames 24 passage opening 25 support device 26 clamping device 27 clamping bars 28 clamping bars 29 clamping beam guide 30 clamping bar drive

Claims (15)

  1. A bending press (18) for forming a workpiece (1), comprising a fixed machine frame (19), a clamping device (26) arranged on the latter comprising a first clamping beam (27), which comprises a first clamping jaw (2) with a first shaping edge (5), and a second clamping beam (28) adjustable relative thereto by means of clamping beam guide (29) and a clamping beam drive (30), which comprises a second clamping jaw (3) with a second shaping edge (6), wherein the workpiece (1) can be clamped between the clamping jaws (2, 3), and at least one bending bar (7, 38) adjustable by means of a bending bar guide (33) and a bending bar drive (35) relative to the machine frame (19) with at least one bending edge (8, 39), the movement path (12) of which moves at a distance (10) past the shaping edges (5, 6) of the clamping jaws (2, 3) and by means of which a portion (4) of the workpiece (1) projecting between the shaping edges (5, 6) can be angled relative to the part of the workpiece (1) clamped between the clamping jaws (2, 3), characterized in that the bending bar guide (33) is designed as a linear guide (34) and produces a straight movement path (12) of the bending edge (8, 39) and the shaping edges (5, 6) of both clamping jaws (2, 3) by means of a transverse guide (40) of the clamping beams (27, 28) and an adjusting drive (41) are adjustable along an adjustment path (13, 14, 17) which approaches the movement path (12) of the bending edge (8).
  2. The bending press (18) according to claim 1, characterized in that the transverse guide (40) comprises the clamping beam guide (29) of the second clamping beam (28) and a structurally separate clamping beam guide (45) of the first clamping beam (27), wherein the adjustment paths (13, 14, 17) of the clamping beams (27, 28) run parallel to one another.
  3. The bending press (18) according to claim 2, characterized in that the clamping beam guides (29, 45) are designed as mutually parallel straight guides and run at an inclination angle (49), in particular between 10° and 30°, relative to the bending bar guide (33).
  4. The bending press (18) according to claim 1, characterized in that the transverse guide (40) of the clamping beam (27, 28) runs approximately at a right angle to the bending bar guide (33).
  5. The bending press (18) according to claim 1 or 4, characterized in that the clamping beams (27, 28) are arranged on a clamping beam frame, in particular an O-frame (31), which is adjustable relative to the machine frame (19) by means of the transverse guide (40) and the adjusting drive (41) transversely to the movement path (12) of the bending edge (8, 39).
  6. The bending press (18) according to one of the preceding claims, characterized in that the bending bar guide (33, 34) is arranged on a first frame part, in particular an O-frame (23), and the clamping beam guide (29, 45) and the transverse guide (40) are arranged on a second frame part spaced apart therefrom, in particular an O-frame (21).
  7. The bending press (18) according to one of claims 1 to 6, characterized in that the bending bar guide (33) and the clamping jaw guide (29, 45) and the transverse guide (40) are arranged on opposite outsides (51, 52) of a central frame part (50), in particular an O-frame.
  8. The bending press (18) according to one of the preceding claims, characterized in that on the machine frame (19) two opposite adjustable bending bars (7, 38) are arranged for angling in opposite directions.
  9. The bending press (18) according to one of claims 1 to 7, characterized in that two spaced apart and mutually oriented bending bars (7, 38) are arranged on a common bar frame, in particular an O-frame, and the latter can be adjusted in a straight line by means of the bending bar guide (33).
  10. The bending press (18) according to one of the preceding claims, characterized in that a horizontal distance (10) between the clamping beams (27, 28) and bending bars (7, 38) can be adjusted.
  11. The bending press (18) according to one of the preceding claims, characterized in that the shaping edges (5, 6) on the clamping jaws (2, 3) are composed of tool segments in the form of clamping tools (43) and/or the bending edge (8, 39) on the bending bar (7, 38) of tool segments in the form of bending tools (37).
  12. The bending press (18) according to one of the preceding claims, characterized in that in the machine frame (19) between the clamping beams (27, 28) and the bending bar or bars (7, 38) a free opening (24) for a workpiece (1) is provided from the front side (20).
  13. A method for forming a workpiece (1), in which said workpiece is clamped between a first clamping jaw (2) with a first shaping edge (5) arranged on a first clamping beam (27) and a second clamping jaw (3) with a second shaping edge (6) arranged on a second clamping beam (28) in such a manner that a portion (4) projects between the shaping edges (5, 6) and afterwards a bending edge (8, 39) of an adjustable bending bar (7, 38) is guided at a distance (10) past the shaping edges (5, 6), whereby the portion (4) is angled relative to the part of the workpiece (1) clamped between the clamping jaws (2, 3), characterized in that the bending edge (8, 39) is guided on angling along a straight movement path (12) and, after the bending edge (8, 39) has passed the shaping edges (5, 6), the shaping edges (5, 6) of both clamping jaws (2, 3) are adjusted along with the clamped workpiece (1) by means of a transverse guide (40) of the clamping beams (27, 28) and an adjusting drive (41) along an adjustment path (13, 14, 17) which approaches the movement path (12) of the bending edge (8, 39).
  14. The method according to claim 13, characterized in that after the bending edge (8, 39) has passed the shaping edges (5, 6), the adjusting movement of the bending edge (8, 39) is largely or completely stopped and, at the same time or immediately after, the shaping edges (5, 6) are moved closer at a right angle perpendicular to or perpendicularly over the movement path (12) of the bending edge (8, 39).
  15. The method according to claim 13, characterized in that once the bending edge (8, 39) has passed the shaping edges (5, 6), the shaping edges (5, 6) are moved closer at an inclination angle (49) perpendicular to or perpendicularly over the movement path (12) of the bending edge (8, 39) and the adjusting movement of the bending edge (8, 39) coupled with the movement of the shaping edges (5, 6) is continued until the completion of the shaping process.
EP14805166.7A 2013-10-04 2014-10-02 Bending press and bending method Not-in-force EP3052256B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ATA50645/2013A AT514821B1 (en) 2013-10-04 2013-10-04 Bending press and bending process
PCT/AT2014/050232 WO2015048836A1 (en) 2013-10-04 2014-10-02 Bending press and bending method

Publications (2)

Publication Number Publication Date
EP3052256A1 EP3052256A1 (en) 2016-08-10
EP3052256B1 true EP3052256B1 (en) 2017-07-26

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP14805166.7A Not-in-force EP3052256B1 (en) 2013-10-04 2014-10-02 Bending press and bending method

Country Status (4)

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US (2) US10350662B2 (en)
EP (1) EP3052256B1 (en)
AT (1) AT514821B1 (en)
WO (1) WO2015048836A1 (en)

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AT516834B1 (en) * 2015-05-26 2016-09-15 Trumpf Maschinen Austria Gmbh & Co Kg Method for swivel bending
DE102018000344B3 (en) 2018-01-17 2019-05-23 Nikolaus Franz Duscher Bending machine, bending unit, electronic control device and method for bending a workpiece from flat material
AT520943B1 (en) * 2018-02-21 2019-09-15 Trumpf Maschinen Austria Gmbh & Co Kg Production plant with tool change unit and clamping jaw and method for tool change
IT201900009657A1 (en) * 2019-06-20 2020-12-20 Dallan Spa BENDING MACHINE FOR SHEETS AND METHOD OF BENDING SHEETS
CN111618134B (en) * 2020-06-01 2023-11-24 歌尔股份有限公司 bending machine
CN111922158A (en) * 2020-06-10 2020-11-13 湖南南洋电气有限公司 Novel hydraulic edge folding device
CN112275852B (en) * 2020-10-10 2021-11-30 南京云上自动化科技有限公司 Full-automatic two-way flanging machine precision compensation mechanism
CN113926882B (en) * 2021-10-22 2024-07-05 新代科技(苏州)有限公司 Edge changing borrowing method for bending center

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Also Published As

Publication number Publication date
AT514821B1 (en) 2015-06-15
US20160271671A1 (en) 2016-09-22
WO2015048836A1 (en) 2015-04-09
EP3052256A1 (en) 2016-08-10
US10350662B2 (en) 2019-07-16
US11117175B2 (en) 2021-09-14
AT514821A1 (en) 2015-04-15
US20190247905A1 (en) 2019-08-15

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