EP0555752A1 - Rotating bending tool with permanent lubrication - Google Patents

Rotating bending tool with permanent lubrication Download PDF

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Publication number
EP0555752A1
EP0555752A1 EP93101643A EP93101643A EP0555752A1 EP 0555752 A1 EP0555752 A1 EP 0555752A1 EP 93101643 A EP93101643 A EP 93101643A EP 93101643 A EP93101643 A EP 93101643A EP 0555752 A1 EP0555752 A1 EP 0555752A1
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EP
European Patent Office
Prior art keywords
rotary bending
bending head
bending tool
lubricant
rotary
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP93101643A
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German (de)
French (fr)
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EP0555752B1 (en
Inventor
Wolfgang Katz
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Danly Corp
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Danly Corp
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/04—Bending sheet metal along straight lines, e.g. to form simple curves on brakes making use of clamping means on one side of the work
    • B21D5/042—With a rotational movement of the bending blade
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D37/00—Tools as parts of machines covered by this subclass
    • B21D37/18—Lubricating, e.g. lubricating tool and workpiece simultaneously
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/02—Bending sheet metal along straight lines, e.g. to form simple curves on press brakes without making use of clamping means
    • B21D5/0209—Tools therefor

Definitions

  • the invention relates to a rotary bending tool according to the preamble of claim 1.
  • Rotary bending tools of this type are used in presses, as are known, for example, from US Pat. No. 4,002,049.
  • the shaping is carried out by a combined rotation and displacement movement of the tool.
  • the tool consists of a rotary bending head, which has the shape of a cylinder with an approximately V-shaped recess, the angle between the two legs of the V-shaped recess being essentially determined by the bending angle of the molded part to be bent and in most cases is in the order of 90 °.
  • the rotary bending head interacts with a correspondingly designed die, the bent part to be deformed being shaped around the die by the recess in the rotary bending head.
  • the rotary bending head experiences the descending Saddle block, in which it is rotatably mounted, first a displacement movement, which is overlaid by a rotary movement during the actual deformation process.
  • the mounting of the rotary bending head in the saddle block is of the greatest importance, since it must not only transmit the pressure, but at the same time must allow the rotary bending head to rotate as smoothly as possible.
  • this storage consisted of an approximately semicircular recess in the saddle block, in which the rotary bending head was inserted.
  • lubricant was only introduced into the approximately semicircular recess during the first assembly.
  • this type of lubrication is far from sufficient because the lubricant is displaced from the bearing area after a short time.
  • the resistance increases rapidly, so that the force required for shaping increases continuously with increasing service life.
  • the saddle block has a wedge-shaped insert, the position of which can be adjusted in relation to the saddle head.
  • the flanking edge of the wedge-shaped insert takes on the function of another storage area. The adjustability of the wedge insert enables precise adjustment of the bearing play of the rotary bending head in the saddle block.
  • a further improvement by this device is that a groove is provided in both the saddle block and in the wedge insert, which receives a lubricant-soaked strand.
  • the groove is designed so that it comprises about three-quarters of the strand. The remaining quarter of the strand is in contact with the rotary bending head. The back and forth movement of the rotary bending head releases lubricant from the impregnated strand.
  • the arrangement of the two lubricant-impregnated strands offset by approximately 180 ° should ensure that more or less the entire lateral surface of the rotary bending head is adequately supplied with lubricant.
  • the strand usually consists of fiber material which has a relatively high absorption capacity for the lubricant.
  • the fibers have the property that they are easily torn out of the fiber composite when the rotary bending head slides past. Due to the adhesion of the lubricant, they initially adhere to the surface of the rotary bending head and are drawn into the contact point with the bearing surfaces of the saddle block. There they provide increased resistance and wear.
  • the object of the present invention is therefore to provide a generic rotary bending tool in which these problems no longer occur.
  • the invention is based on the idea of providing a permanent lubrication device for the mounting of the rotary bending head, which is integrated in the saddle block.
  • This has the advantage that an adequate supply of lubricant is possible during the entire operating life of the rotary bending tool. A decrease in the lubricating effect or even dry running of the storage is no longer given. The service life of the rotary bending tool can therefore be increased enormously. The factor limiting the service life is now no longer the mounting of the rotary bending head in the saddle block, but the durability of the bending surfaces, ie the V-shaped recess of the rotary bending head and the contact surfaces of the dies.
  • the centerpiece of the rotary bending tool is the rotary bending head 2. It has a substantially V-shaped recess 21 which extends over the entire length of the rotary bending head.
  • the angle between the two leg surfaces of the V-shaped recess depends on which bending angle is to be realized on the bent part. The most common application is to realize a right angle on the bent part. In this case, the angle between the two leg surfaces is approximately 90 °.
  • the rotary bending head is mounted in a saddle block 1, the bearing surfaces 15, 16, 17 being formed by sub-segments in the form of a circular arc.
  • the storage areas are in the Saddle block arranged so that they support the rotary bending head essentially in an angular range of approximately 180 °.
  • a retaining wedge 3 is fastened to the saddle block in a manner not shown in detail. Its flank 31 is designed in such a way that it forms another bearing area for the rotary bending head 2 at its tapering end.
  • the holding wedge can be changed and fixed in position relative to the rotary bending head 2 and thus also to the saddle block 1. This makes it possible to adjust the bearing play of the rotary bending head 2.
  • the rotary bending head 2 also has a groove 22 with a contact surface 23.
  • a restoring element 5 engages in this groove 22.
  • the restoring element 5 consists essentially of a plunger 51, which is pressed against the contact surface 23 of the rotary bending head 2 under the pretension of a spring 52.
  • the rotary bending head 2 interacts with a die 9, which is designed in accordance with the V-shaped recess 21 of the rotary bending head 2.
  • the bent part 10 is bent around the die 9 by displacement and simultaneous rotation of the rotary bending head 2, the bending angle being determined by the angle of the V-shaped recess 21.
  • the rotary bending tool In the starting position according to FIG. 1, the rotary bending tool is located directly at the beginning of the deformation process.
  • the rotary bending head 2 rests on the bent part 10 and presses the bent part 10 against the die 9.
  • the front end of the plunger 51 presses against the contact surface 23 with spring support (not shown here).
  • the rotary bending head 2 executes a positively guided rotary movement until the bent part 10 is bent around the die 9 and has come to rest on all sides between the die 9 and the V-shaped recess 21.
  • the rotary bending head 2 with the saddle block 1 is moved upward in the opposite direction of the arrow M.
  • the plunger 51 ensures that the rotary bending head 2 is pressed back into its starting position during the return.
  • a stop not shown here, ensures that the rotary bending head 2 is prevented from turning back beyond the starting position.
  • Lubricant chambers 8 supply the bearing surfaces 15, 16, 17 with lubricant. They are located between the bearing surfaces 15, 16, 17 and are integrated in the saddle block. The volume of the lubricant chambers is dimensioned such that a sufficient supply of lubricant can be introduced for a certain service life of the rotary bending tool.
  • the volume of the lubricant chamber 8 can be kept smaller because of a continuous or discontinuous addition of Lubricant is possible even while the rotary bending tool is in operation.
  • the lubricant chambers 8 extend substantially over the entire axial extent of the rotary bending head 2 to be supported. End closures 11 ensure that the escape of oil on the one hand and the penetration of contaminants on the other hand is avoided.
  • the end closures 11 can be produced in a simple manner by closing the recesses originally continuous in the axial direction.
  • lubricant supply channels 7 For a uniform supply of lubricant, it may be necessary to provide several lubricant supply channels 7 in a parallel arrangement. It is also possible to provide several permanent lubrication devices. This is particularly relevant if the rotary bending tool has a very large axial extent.
  • the lubricant feed channel 7 can be closed at the end with a plug 6.
  • the design in the form of a blind plug is sufficient for cases in which the lubricant only has to be refilled at very large intervals.
  • stopper 6 For more frequent refilling operations, it is advantageous to design the stopper 6 in the manner of a grease nipple.
  • a valve ball 61 supported by spring 63, rests on a valve seat 63 provided in the plug 6.
  • lubricant feed channel 7 connected to a central lubricant supply system, not shown here. In this case, a fully automatic permanent supply of the bearing points with lubricant is ensured.
  • the return gear 5 is arranged coaxially in the lubricant supply channel 7. This ensures that the contact point between the plunger 51 and the contact surface 23 is permanently supplied with lubricant.
  • oils or greases can also be used as lubricants, but also fully synthetic lubricants.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sliding-Contact Bearings (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Mounting, Exchange, And Manufacturing Of Dies (AREA)
  • Earth Drilling (AREA)
  • Forging (AREA)

Abstract

Rotationsbiegewerkzeug, bestehend aus Rotationsbiegekopf (2), Sattelblock (1) mit Lagerflächen (15-17) und Haltekeil (3) zur Aufnahme des Rotationsbiegekopfs, Rückstellorgan (5) für den Rotationsbiegekopf und Matrize, wobei die Lagerung des Rotationsbiegekopfs mit einer Dauerschmiereinrichtung versehen ist. Die Dauerschmiereinrichtung besteht bevorzugt aus Schmiermittelkammern (8), die über einen Schmiermittelzuführkanal (7) gespeist werden. Bevorzugt wird das Rückstellorgan für den Rotationsbiegekopf in den Schmiermittelzuführkanal integriert. <IMAGE>Rotary bending tool, consisting of a rotary bending head (2), saddle block (1) with bearing surfaces (15-17) and retaining wedge (3) for receiving the rotary bending head, return element (5) for the rotary bending head and die, the bearing of the rotary bending head being provided with a permanent lubrication device . The permanent lubrication device preferably consists of lubricant chambers (8) which are fed via a lubricant feed channel (7). The restoring element for the rotary bending head is preferably integrated into the lubricant feed channel. <IMAGE>

Description

Die Erfindung betrifft ein Rotationsbiegewerkzeug gemäß Oberbegriff des Anspruchs 1.The invention relates to a rotary bending tool according to the preamble of claim 1.

Derartige Rotationsbiegewerkzeuge werden in Pressen, wie sie beispielsweise aus der US 4,002,049 bekannt sind, eingesetzt. Bei derartigen Pressen erfolgt die Formgebung durch eine kombinierte Dreh- und Verschiebebewegung des Werkzeugs. Das Werkzeug besteht aus einem Rotationsbiegekopf, der die Gestalt eines Zylinders mit einer in etwa V-förmigen Ausnehmung hat, wobei der Winkel zwischen den beiden Schenkein der V-förmigen Ausnehmung im wesentlichen durch den Biegewinkel des zu biegenden Formteils bestimmt wird und in den meisten Fällen in der Größenordnung von 90° liegt.Rotary bending tools of this type are used in presses, as are known, for example, from US Pat. No. 4,002,049. In such presses, the shaping is carried out by a combined rotation and displacement movement of the tool. The tool consists of a rotary bending head, which has the shape of a cylinder with an approximately V-shaped recess, the angle between the two legs of the V-shaped recess being essentially determined by the bending angle of the molded part to be bent and in most cases is in the order of 90 °.

Der Rotationsbiegekopf wirkt mit seiner V-förmigen Ausnehmung mit einer entsprechend gestalteten Matrize zusammen, wobei das zu verformende Biegeteil um die Matrize herum durch die Ausnehmung im Rotationsbiegekopf geformt wird. Hierbei erfährt der Rotationsbiegekopf durch den herabfahrenden Sattelblock, in welchem er drehbar gelagert ist, zunächst eine Verschiebebewegung, die von einer Drehbewegung während des eigentlichen Verformungsvorgangs überlagert wird. Der Lagerung des Rotationsbiegekopfs im Sattelblock kommt deshalb größte Bedeutung zu, da diese nicht nur den Preßdruck übertragen, sondern gleichzeitig eine möglichst leichtgängige Rotation des Rotationsbiegekopfes ermöglichen muß.With its V-shaped recess, the rotary bending head interacts with a correspondingly designed die, the bent part to be deformed being shaped around the die by the recess in the rotary bending head. Here, the rotary bending head experiences the descending Saddle block, in which it is rotatably mounted, first a displacement movement, which is overlaid by a rotary movement during the actual deformation process. The mounting of the rotary bending head in the saddle block is of the greatest importance, since it must not only transmit the pressure, but at the same time must allow the rotary bending head to rotate as smoothly as possible.

Ursprünglich bestand diese Lagerung aus einer etwa halbkreisförmigen Ausnehmung im Sattelblock, in welche der Rotationsbiegekopf eingesetzt war. Zur Erleichterung der Drehbewegung wurde lediglich beim erstmaligen Zusammenbau Schmiermittel in die etwa halbkreisförmige Ausnehmung eingebracht. Es zeigte sich jedoch, daß diese Art der Schmierung bei weitem nicht ausreichend ist, weil bereits nach kurzer Zeit das Schmiermittel aus dem Lagerbereich verdrängt wird. Durch dieses Trockenlaufen der Lagerung erhöht sich rasch der Widerstand, so daß der erforderliche Kraftaufwand bei der Formgebung mit zunehmender Gebrauchsdauer ständig ansteigt. Bereits nach relativ kurzem Einsatz besteht die Gefahr des Festfressens des Rotationsbiegekopfs im Sattelblock.Originally, this storage consisted of an approximately semicircular recess in the saddle block, in which the rotary bending head was inserted. To facilitate the rotary movement, lubricant was only introduced into the approximately semicircular recess during the first assembly. However, it was found that this type of lubrication is far from sufficient because the lubricant is displaced from the bearing area after a short time. Through this dry running of the bearing, the resistance increases rapidly, so that the force required for shaping increases continuously with increasing service life. After a relatively short period of use, there is a risk of the rotary bending head seizing up in the saddle block.

Zur Überwindung dieses Problems wurde bereits eine modifizierte Lagerung in der US 4,424,644 vorgeschlagen. Dort liegt der Rotationsbiegekopf nicht mehr vollflächig in der im wesentlichen halbkreisförmig gestalteten Ausnehmung des Sattelblocks, sondern ruht auf mehreren Gleitstegen. Diese Gleitstege sind in Form von sektorförmigen Vorsprüngen einer im übrigen halbkreisförmigen Ausnehmung im Sattelblock, gestaltet. Der Rotationsbiegekopf ist lediglich im Kontakt mit diesen Stegen, wobei beispielsweise drei oder vier solcher Stege vorgesehen sind.In order to overcome this problem, a modified bearing arrangement has already been proposed in US 4,424,644. There, the rotary bending head no longer lies over the full area in the essentially semicircular recess of the saddle block, but rests on several sliding webs. These sliding webs are designed in the form of sector-shaped projections of an otherwise semicircular recess in the saddle block. The rotary bending head is only in contact with these webs, for example three or four such webs being provided.

Weiterhin weist der Sattelblock einen keilförmigen Einsatz auf, dessen Lage in Bezug auf den Sattelkopf einstellbar veränderlich ist. Die auslaufende Flanke des keilförmigen Einsatzes übernimmt die Funktion einer weiteren Lagerfläche. Die Verstellbarkeit des Keileinsatzes ermöglicht eine genaue Justierung des Lagerspiels des Rotationsbiegekopfs im Sattelblock.Furthermore, the saddle block has a wedge-shaped insert, the position of which can be adjusted in relation to the saddle head. The flanking edge of the wedge-shaped insert takes on the function of another storage area. The adjustability of the wedge insert enables precise adjustment of the bearing play of the rotary bending head in the saddle block.

Eine weitere Verbesserung durch diese Vorrichtung liegt darin, daß sowohl im Sattelblock als auch im Keileinsatz jeweils eine Nut vorgesehen ist, die einen schmiermittel-getränkten Strang aufnimmt. Die Nut ist so gestaltet, daß sie den Strang zu etwa Dreivierteln umfaßt. Das verbleibende Viertel des Strangs ist im Kontakt mit dem Rotationsbiegekopf. Durch die Hin- und Herbewegung des Rotationsbiegekopfs wird Schmiermittel vom getränkten Strang abgegeben. Durch die um etwa 180° versetzte Anordnung der beiden schmiermittel-getränkten Stränge sollte sichergestellt werden, daß mehr oder weniger die gesamte Mantelfläche des Rotationsbiegekopfs ausreichend mit Schmiermittel versorgt wird.A further improvement by this device is that a groove is provided in both the saddle block and in the wedge insert, which receives a lubricant-soaked strand. The groove is designed so that it comprises about three-quarters of the strand. The remaining quarter of the strand is in contact with the rotary bending head. The back and forth movement of the rotary bending head releases lubricant from the impregnated strand. The arrangement of the two lubricant-impregnated strands offset by approximately 180 ° should ensure that more or less the entire lateral surface of the rotary bending head is adequately supplied with lubricant.

Es hat sich nun gezeigt, daß es auch mit dieser verbesserten Vorrichtung nicht möglich ist, eine ausreichend standfeste Lagerung des Rotationsbiegekopfs im Sattelblock zu gewährleisten. So tritt zwar eine Verbesserung dadurch ein, daß die beiden Stränge bei jeder Drehbewegung des Rotationsbiegekopfs Schmiermittel auf den Mantel- und damit die Lagerfläche übertragen, doch läßt auch bei dieser Konfiguration die Wirkung relativ rasch nach, da die Aufnahmefähigkeit der Stränge für Schmiermittel sehr begrenzt ist. Der Schmiermittelvorrat erschöpft sich deshalb sehr rasch. Es handelt sich auch bei dieser Vorrichtung um eine sogenannte EinmalSchmierung, da die schmiermittel-getränkten Stränge beim Zusammenbau der Vorrichtung eingesetzt werden. Ein Austausch der Stränge während des Betriebs der Vorrichtung ist nicht vorgesehen, sondern erfordert die völlige Demontage des Werkzeugs.It has now been shown that even with this improved device it is not possible to ensure a sufficiently stable mounting of the rotary bending head in the saddle block. So there is an improvement in that the two strands transfer lubricant to the jacket surface and thus the bearing surface with each rotational movement of the rotary bending head, but the effect wears off relatively quickly in this configuration as well, since the absorption capacity of the strands for lubricants is very limited . The lubricant supply is therefore exhausted very quickly. This device is also a so-called one-time lubrication, since the lubricant-soaked strands when Assembly of the device can be used. An exchange of the strands during the operation of the device is not provided, but requires the complete disassembly of the tool.

Ein weiterer Nachteil dieser Art der Schmierung liegt im Abrieb von Strangmaterial, welches sich unvermeidlich zwischen den Lagerflächen des Sattelblocks und der Mantelfläche des Rotationsbiegekopfs festsetzt. So besteht der Strang in der Regel aus Fasermaterial, welches ein relativ hohes Aufnahmevermögen für das Schmiermittel aufweist. Die Fasern haben jedoch die Eigenschaft, daß sie beim Vorbeigleiten des Rotationsbiegekopfs sehr leicht aus dem Faserverbund gerissen werden. Durch die Adhäsion des Schmiermittels bleiben sie zunächst an der Oberfläche des Rotationsbiegekopfs haften und werden in die Kontaktstelle mit den Lagerflächen des Sattelblocks eingezogen. Dort sorgen sie für erhöhten Widerstand und Verschleiß.Another disadvantage of this type of lubrication is the abrasion of strand material, which inevitably settles between the bearing surfaces of the saddle block and the outer surface of the rotary bending head. The strand usually consists of fiber material which has a relatively high absorption capacity for the lubricant. However, the fibers have the property that they are easily torn out of the fiber composite when the rotary bending head slides past. Due to the adhesion of the lubricant, they initially adhere to the surface of the rotary bending head and are drawn into the contact point with the bearing surfaces of the saddle block. There they provide increased resistance and wear.

Aufgabe der vorliegenden Erfindung ist es deshalb, ein gattungsgemäßes Rotationsbiegewerkzeug zur Verfügung zu stellen, bei dem diese Probleme nicht mehr auftreten.The object of the present invention is therefore to provide a generic rotary bending tool in which these problems no longer occur.

Erfindungsgemäß wird die Aufgabe mit einem Rotationsbiegewerkzeug nach Anspruch 1 gelöst. Vorteilhafte Ausgestaltungen ergeben sich aus den Unteransprüchen.According to the invention the object is achieved with a rotary bending tool according to claim 1. Advantageous refinements result from the subclaims.

Der Erfindung liegt die Idee zugrunde, eine Dauerschmiereinrichtung für die Lagerung des Rotationsbiegekopfs vorzusehen, die im Sattelblock integriert ist. Damit ergibt sich der Vorteil, daß während der gesamten Betriebsdauer des Rotationsbiegewerkzeugs eine ausreichende Versorgung mit Schmiermittel möglich ist. Ein Nachlassen der Schmierwirkung bzw. gar das Trockenlaufen der Lagerung ist nicht mehr gegeben. Die Standzeit des Rotationsbiegewerkzeugs läßt sich deshalb enorm steigern. Der die Lebensdauer limitierende Faktor ist nun nicht mehr die Lagerung des Rotationsbiegekopfs im Sattelblock, sondern die Haltbarkeit der Biegeflächen, d.h. der V-förmigen Ausnehmung des Rotationsbiegekopfs und der Anlageflächen der Matrizen.The invention is based on the idea of providing a permanent lubrication device for the mounting of the rotary bending head, which is integrated in the saddle block. This has the advantage that an adequate supply of lubricant is possible during the entire operating life of the rotary bending tool. A decrease in the lubricating effect or even dry running of the storage is no longer given. The service life of the rotary bending tool can therefore be increased enormously. The factor limiting the service life is now no longer the mounting of the rotary bending head in the saddle block, but the durability of the bending surfaces, ie the V-shaped recess of the rotary bending head and the contact surfaces of the dies.

Die Erfindung wird weiterhin anhand der Figuren erläutert. Es zeigen

Figur 1 -
das Rotationsbiegewerkzeug in der Position zu Beginn des Biegevorgangs,
Figur 2 -
das Rotationsbiegewerkzeug in der Position am Ende des Biegevorgangs,
Figur 3 -
das Rotationsbiegewerkzeug im Schnitt A-B aus Figur 1.
The invention is further explained on the basis of the figures. Show it
Figure 1 -
the rotary bending tool in the position at the beginning of the bending process,
Figure 2 -
the rotary bending tool in the position at the end of the bending process,
Figure 3 -
the rotary bending tool in section AB from Figure 1.

Kernstück des Rotationsbiegewerkzeugs stellt der Rotationsbiegekopf 2 dar. Er besitzt eine im wesentlichen V-förmige Ausnehmung 21, die sich über die gesamte Länge des Rotationsbiegekopfs erstreckt. Der Winkel zwischen beiden Schenkelflächen der V-förmigen Ausnehmung hängt davon ab, welcher Biegewinkel am Biegeteil realisiert werden soll. Der häufigste Anwendungsfall liegt darin, einen rechten Winkel am Biegeteil zu realisieren. In diesem Fall beträgt auch der Winkel zwischen den beiden Schenkelflächen in etwa 90°.The centerpiece of the rotary bending tool is the rotary bending head 2. It has a substantially V-shaped recess 21 which extends over the entire length of the rotary bending head. The angle between the two leg surfaces of the V-shaped recess depends on which bending angle is to be realized on the bent part. The most common application is to realize a right angle on the bent part. In this case, the angle between the two leg surfaces is approximately 90 °.

Der Rotationsbiegekopf ist in einem Sattelblock 1 gelagert, wobei die Lagerflächen 15, 16, 17 durch kreisbogenförmige Teilsegmente gebildet werden. Die Lagerflächen sind dabei im Sattelblock so angeordnet, daß sie den Rotationsbiegekopf im wesentlichen in einem Winkelbereich von etwa 180° unterstützen. Am Sattelblock ist in nicht näher dargestellter Art und Weise ein Haltekeil 3 befestigt. Seine Flanke 31 ist so gestaltet, daß sie an ihrem auslaufenden Ende einen weiteren Lagerbereich für den Rotationsbiegekopf 2 bildet. Durch hier nicht näher dargestellte Mittel kann der Haltekeil in seiner Lage relativ zum Rotationsbiegekopf 2 und damit auch zum Sattelblock 1 verändert und fixiert werden. Dadurch ist möglich, das Lagerspiel des Rotationsbiegekopfs 2 einzustellen.The rotary bending head is mounted in a saddle block 1, the bearing surfaces 15, 16, 17 being formed by sub-segments in the form of a circular arc. The storage areas are in the Saddle block arranged so that they support the rotary bending head essentially in an angular range of approximately 180 °. A retaining wedge 3 is fastened to the saddle block in a manner not shown in detail. Its flank 31 is designed in such a way that it forms another bearing area for the rotary bending head 2 at its tapering end. By means not shown here, the holding wedge can be changed and fixed in position relative to the rotary bending head 2 and thus also to the saddle block 1. This makes it possible to adjust the bearing play of the rotary bending head 2.

Der Rotationsbiegekopf 2 weist weiterhin eine Nut 22 mit einer Anlagefläche 23 auf. In diese Nut 22 greift ein Rückstellorgan 5 ein. Das Rückstellorgan 5 besteht im wesentlichen aus einem Stößel 51, welcher unter der Vorspannung einer Feder 52 gegen die Anlagefläche 23 des Rotationsbiegekopfs 2 gedrückt wird.The rotary bending head 2 also has a groove 22 with a contact surface 23. A restoring element 5 engages in this groove 22. The restoring element 5 consists essentially of a plunger 51, which is pressed against the contact surface 23 of the rotary bending head 2 under the pretension of a spring 52.

Der Rotationsbiegekopf 2 wirkt mit einer Matrize 9 zusammen, die entsprechend der V-förmigen Ausnehmung 21 des Rotationsbiegekopfs 2 gestaltet ist. Biegeteil 10 wird durch Verschiebung und gleichzeitiger Rotation des Rotationsbiegekopfs 2 um die Matrize 9 herum gebogen, wobei der Biegewinkel durch den Winkel der V-förmigen Ausnehmung 21 bestimmt wird.The rotary bending head 2 interacts with a die 9, which is designed in accordance with the V-shaped recess 21 of the rotary bending head 2. The bent part 10 is bent around the die 9 by displacement and simultaneous rotation of the rotary bending head 2, the bending angle being determined by the angle of the V-shaped recess 21.

In der Ausgangsposition gemäß Figur 1 befindet sich das Rotationsbiegewerkzeug unmittelbar am Beginn des Deformationsvorgangs. Der Rotationsbiegekopf 2 liegt auf dem Biegeteil 10 auf und drückt das Biegeteil 10 gegen die Matrize 9. Das vordere Ende des Stößels 51 drückt federunterstützt gegen die Anlagefläche 23 (hier nicht dargestellt).In the starting position according to FIG. 1, the rotary bending tool is located directly at the beginning of the deformation process. The rotary bending head 2 rests on the bent part 10 and presses the bent part 10 against the die 9. The front end of the plunger 51 presses against the contact surface 23 with spring support (not shown here).

Bei einer Verschiebung des Sattelblocks 1 in Pfeilrichtung M vollführt der Rotationsbiegekopf 2 eine zwangsgeführte Drehbewegung, und zwar solange, bis das Biegeteil 10 um die Matrize 9 herum gebogen und zur allseitigen Anlage zwischen Matrize 9 und V-förmiger Ausnehmung 21 gelangt ist.When the saddle block 1 is displaced in the direction of the arrow M, the rotary bending head 2 executes a positively guided rotary movement until the bent part 10 is bent around the die 9 and has come to rest on all sides between the die 9 and the V-shaped recess 21.

Bei der Drehbewegung des Rotationsbiegekopfs 2 wird der Stößel 51 an der Anlagefläche 23 geführt nach rechts verschoben, wobei die Feder 52 zusammengedrückt wird.During the rotary movement of the rotary bending head 2, the plunger 51 is moved to the right on the contact surface 23, the spring 52 being compressed.

Nach dem Abschluß des Biegevorgangs wird der Rotationsbiegekopf 2 mit dem Sattelblock 1 entgegen der Pfeilrichtung M nach oben gefahren. Unterstützt durch die Feder 52 sorgt der Stößel 51 dafür, daß während des Rücklaufs der Rotationsbiegekopf 2 in seine Ausgangslage zurückgedrückt wird. Ein hier nicht näher dargestellter Anschlag sorgt dafür, daß ein Rückdrehen des Rotationsbiegekopfs 2 über die Ausgangsposition hinaus verhindert wird.After completion of the bending process, the rotary bending head 2 with the saddle block 1 is moved upward in the opposite direction of the arrow M. Supported by the spring 52, the plunger 51 ensures that the rotary bending head 2 is pressed back into its starting position during the return. A stop, not shown here, ensures that the rotary bending head 2 is prevented from turning back beyond the starting position.

Die Versorgung der Lagerflächen 15, 16, 17 mit Schmiermittel erfolgt durch die Schmiermittelkammern 8. Sie befinden sich jeweils zwischen den Lagerflächen 15, 16, 17 und sind im Sattelblock integriert. Das Volumen der Schmiermittelkammern ist so bemessen, daß für eine bestimmte Lebensdauer des Rotationsbiegewerkzeugs ein ausreichender Schmiermittelvorrat eingebracht werden kann.Lubricant chambers 8 supply the bearing surfaces 15, 16, 17 with lubricant. They are located between the bearing surfaces 15, 16, 17 and are integrated in the saddle block. The volume of the lubricant chambers is dimensioned such that a sufficient supply of lubricant can be introduced for a certain service life of the rotary bending tool.

In einer bevorzugten Ausführungsform ist ein Schmiermittelzuführkanal 7, beispielsweise in Form einer Bohrung, im Sattelblock 1 vorgesehen. Er mündet in die Schmiermittelkammer 8 und ermöglicht so die Zufuhr weiteren Schmiermittels, auch während des Betriebs. In diesem Falle kann das Volumen der Schmiermittelkammer 8 geringer gehalten werden, weil eine kontinuierliche oder auch diskontinuierliche Zugabe von Schmiermittel selbst während des laufenden Betriebes des Rotationsbiegewerkzeuges möglich ist.In a preferred embodiment, a lubricant supply channel 7, for example in the form of a bore, is provided in the saddle block 1. It opens into the lubricant chamber 8 and thus enables further lubricant to be supplied, even during operation. In this case, the volume of the lubricant chamber 8 can be kept smaller because of a continuous or discontinuous addition of Lubricant is possible even while the rotary bending tool is in operation.

Für eine optimale Versorgung der Lagerstellen ist es günstig, wenn sich die Schmiermittelkammern 8 im wesentlichen über die gesamte axiale Ausdehnung des zu lagernden Rotationsbiegekopfs 2 erstrecken. Stirnseitige Abschlüsse 11 sorgen dafür, daß der Austritt von Öl einerseits sowie das Eindringen von Verunreinigungen andererseits vermieden wird.For an optimal supply of the bearing points, it is favorable if the lubricant chambers 8 extend substantially over the entire axial extent of the rotary bending head 2 to be supported. End closures 11 ensure that the escape of oil on the one hand and the penetration of contaminants on the other hand is avoided.

Die stirnseitigen Abschlüsse 11 lassen sich auf einfache Weise durch Zustemmen der ursprünglich in axialer Richtung durchgehenden Ausnehmungen herstellen.The end closures 11 can be produced in a simple manner by closing the recesses originally continuous in the axial direction.

Für eine gleichmäßige Zufuhr von Schmiermittel kann es erforderlich sein, mehrere Schmiermittelzuführkanäle 7 in Parallelanordnung vorzusehen. Auch ist es möglich, mehrere Dauerschmiereinrichtungen vorzusehen. Dies kommt insbesondere dann in Frage, wenn das Rotationsbiegewerkzeug eine sehr große axiale Erstreckung aufweist.For a uniform supply of lubricant, it may be necessary to provide several lubricant supply channels 7 in a parallel arrangement. It is also possible to provide several permanent lubrication devices. This is particularly relevant if the rotary bending tool has a very large axial extent.

Der Schmiermittelzuführkanal 7 kann stirnseitig mit einem Stopfen 6 verschlossen sein. Die Ausführung in Form eines Blindstopfens ist für solche Fälle ausreichend, bei denen das Nachfüllen von Schmiermittel nur in sehr großen zeitlichen Abständen erfolgen muß.The lubricant feed channel 7 can be closed at the end with a plug 6. The design in the form of a blind plug is sufficient for cases in which the lubricant only has to be refilled at very large intervals.

Für häufigere Nachfüllvorgänge ist es von Vorteil, den Stopfen 6 nach Art eines Schmiernippels auszubilden. In diesem Falle ruht eine Ventilkugel 61, unterstützt durch Feder 63, an einem im Stopfen 6 vorgesehenen Ventilsitz 63.For more frequent refilling operations, it is advantageous to design the stopper 6 in the manner of a grease nipple. In this case, a valve ball 61, supported by spring 63, rests on a valve seat 63 provided in the plug 6.

In einer weiteren Variante ist der Schmiermittelzuführkanal 7 mit einer zentralen, hier nicht näher dargestellten Schmiermittelversorgungsanlage verbunden. In diesem Falle ist eine vollautomatische Dauerversorgung der Lagerstellen mit Schmiermittel sichergestellt.Another variant is the lubricant feed channel 7 connected to a central lubricant supply system, not shown here. In this case, a fully automatic permanent supply of the bearing points with lubricant is ensured.

In einer bevorzugten Ausführungsform ist das Rückstellorgang 5 koaxial im Schmiermittelzuführkanal 7 angeordnet. Hierdurch ist gewährleistet, daß die Kontaktstelle zwischen Stößel 51 und Anlagefläche 23 permanent mit Schmiermittel versorgt wird.In a preferred embodiment, the return gear 5 is arranged coaxially in the lubricant supply channel 7. This ensures that the contact point between the plunger 51 and the contact surface 23 is permanently supplied with lubricant.

Als Schmiermittel kommen je nach Anwendungsfall herkömmliche Öle oder Fette aber auch Gleitmittel auf vollsynthetischer Basis in Frage.Depending on the application, conventional oils or greases can also be used as lubricants, but also fully synthetic lubricants.

Claims (7)

Rotationsbiegewerkzeug, bestehend aus einem zylinderförmigen Biegekopf mit einer V-förmigen Ausnehmung, aus einem Sattelblock mit durch wenigstens eine Aussparung voneinander getrennte Lagerflächen sowie einem Haltekeil, zur Aufnahme des Biegekopfs, aus einem Rückstellorgan für den Biegekopf, aus einer mit dessen V-förmiger Ausnehmung zusammenwirkenden Matrize und aus einer im Sattelblock angeordneten Schmiereinrichtung für die Lagerflächen, dadurch gekennzeichnet, daß die Schmiereinrichtung wenigstens einen Schmiermittelzuführkanal (7) aufweist, der in die Aussparung (8) mündet.Rotary bending tool, consisting of a cylindrical bending head with a V-shaped recess, from a saddle block with bearing surfaces separated from one another by at least one recess, and a retaining wedge for receiving the bending head, from a return element for the bending head, from a cooperating with its V-shaped recess Matrix and from a lubricating device for the bearing surfaces arranged in the saddle block, characterized in that the lubricating device has at least one lubricant supply channel (7) which opens into the recess (8). Rotationsbiegewerkzeug nach Anspruch 1, dadurch gekennzeichnet, daß die Aussparung (8) sich im wesentlichen über die gesamte axiale Ausdehnung der Lagerflächen (15, 16, 17) erstreckt und lediglich durch stirnseitige Abschlüsse (11) begrenzt ist.Rotary bending tool according to claim 1, characterized in that the recess (8) extends substantially over the entire axial extent of the bearing surfaces (15, 16, 17) and is only limited by end closures (11). Rotationsbiegewerkzeug nach Anspruch 3, dadurch gekennzeichnet, daß die stirnseitigen Abschlüsse (11) zugestemmte Enden der - zunächst axial durchlaufenden - Aussparung (8) sind.Rotary bending tool according to claim 3, characterized in that the front ends (11) are closed ends of the - initially axially continuous - recess (8). Rotationsbiegewerkzeug nach Ansprüche 1 bis 3, dadurch gekennzeichnet, daß der Schmiermittelzuführkanal (7) an seiner Eintrittseite durch einen Stopfen (6) verschlossen ist.Rotary bending tool according to claims 1 to 3, characterized characterized in that the lubricant supply channel (7) is closed on its inlet side by a stopper (6). Rotationsbiegewerkzeug nach Anspruch 4, dadurch gekennzeichnet, daß der Stopfen (6) eine Ventilkugel (61) aufweist, die durch eine Feder (62) gegen einen Ventilsitz (63) gehalten ist.Rotary bending tool according to claim 4, characterized in that the plug (6) has a valve ball (61) which is held against a valve seat (63) by a spring (62). Rotationsbiegewerkzeug nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß der Schmiermittelzuführkanal (8) mit einer zentralen Schmiermittelversorgungsanlage verbunden ist.Rotary bending tool according to one of claims 1 to 3, characterized in that the lubricant supply channel (8) is connected to a central lubricant supply system. Rotationsbiegewerkzeug nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß das Rückstellorgan (5) einen Stößel (51) aufweist, der durch eine Feder (52) gegen eine Anlagefläche (23) einer den Stößel führenden Nut (22) gehalten und koaxial im Schmiermittelzuführkanal (8) angeordnet ist.Rotary bending tool according to one of claims 1 to 6, characterized in that the restoring member (5) has a plunger (51) which is held by a spring (52) against a contact surface (23) of a groove (22) guiding the plunger and coaxial in the Lubricant feed channel (8) is arranged.
EP93101643A 1992-02-08 1993-02-03 Rotating bending tool with permanent lubrication Expired - Lifetime EP0555752B1 (en)

Applications Claiming Priority (2)

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DE4203680 1992-02-08
DE4203680A DE4203680C1 (en) 1992-02-08 1992-02-08

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EP0555752B1 EP0555752B1 (en) 1995-07-05

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US (1) US5341669A (en)
EP (1) EP0555752B1 (en)
JP (1) JPH06292926A (en)
KR (1) KR930017641A (en)
DE (2) DE4203680C1 (en)
ES (1) ES2078073T3 (en)

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US9744579B2 (en) 2015-10-20 2017-08-29 Dayton Lamina Corporation Rotary bending devices
CN111842558A (en) * 2020-06-24 2020-10-30 苏州浪潮智能科技有限公司 Sheet metal component does not have continuous bending device of grinding crack

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CN111842558A (en) * 2020-06-24 2020-10-30 苏州浪潮智能科技有限公司 Sheet metal component does not have continuous bending device of grinding crack

Also Published As

Publication number Publication date
DE4203680C1 (en) 1993-05-06
JPH06292926A (en) 1994-10-21
DE59300317D1 (en) 1995-08-10
US5341669A (en) 1994-08-30
ES2078073T3 (en) 1995-12-01
KR930017641A (en) 1993-09-20
EP0555752B1 (en) 1995-07-05

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