EP0693332A1 - Press with transfer bars - Google Patents

Press with transfer bars Download PDF

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Publication number
EP0693332A1
EP0693332A1 EP95111056A EP95111056A EP0693332A1 EP 0693332 A1 EP0693332 A1 EP 0693332A1 EP 95111056 A EP95111056 A EP 95111056A EP 95111056 A EP95111056 A EP 95111056A EP 0693332 A1 EP0693332 A1 EP 0693332A1
Authority
EP
European Patent Office
Prior art keywords
rollers
cam
press
press according
pretensioning device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP95111056A
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German (de)
French (fr)
Other versions
EP0693332B1 (en
Inventor
Karl Thudium
Andreas Dangelmayr
Dieter Wolz
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L Schuler GmbH
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L Schuler GmbH
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Publication date
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Publication of EP0693332A1 publication Critical patent/EP0693332A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
    • B21D43/02—Advancing work in relation to the stroke of the die or tool
    • B21D43/04—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work
    • B21D43/05—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work specially adapted for multi-stage presses
    • B21D43/055—Devices comprising a pair of longitudinally and laterally movable parallel transfer bars
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/21—Elements
    • Y10T74/2101—Cams
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/21—Elements
    • Y10T74/2101—Cams
    • Y10T74/2107—Follower

Definitions

  • the invention relates to a press with gripper rails for moving workpieces in the machining stations according to the type defined in the preamble of claim 1.
  • the workpiece transport devices which are often designed as gripper rails, must be moved correspondingly quickly.
  • no arbitrarily high speeds are possible, since the workpiece transport devices are usually moved over cam disks, with levers resting on the cam disks which scan the contour of the cam disk. The resulting movement of the levers is then directed in the desired direction for picking up or transporting the workpiece via suitable devices.
  • a press line is known in which individual units of the press line can be moved by conveying devices arranged below the floor level.
  • a cam disk is described, on which a rocker provided with a pressure roller bears, which is provided by a Pneumatic cylinder is pressed against the cam.
  • the device described is not used for moving workpieces in the processing stations of presses, but only for moving entire structural units of a press line.
  • the present invention is therefore based on the object of providing a press with gripper rails for transferring workpieces in the machining stations, which eliminates the disadvantages of the prior art mentioned, in particular which operates economically and rules out disruptions in workpiece transport between the individual machining stations of a press.
  • a double cam plate 1 which has two individual cam plates 2 and 3.
  • the individual cams 2, 3 are arranged on a common shaft 4 so that they move synchronously.
  • the rollers 5, 6 are connected to the workpiece transport device of the press via a rocker arm 7 and a rod 8.
  • the rocker arm 7 itself is rotatably mounted at a point 10.
  • the axis of rotation of the rocker arm 7 extends parallel to the axial direction of the shaft 4.
  • the rollers 5, 6 are each rotatably mounted on bolts 11, 12.
  • the pin of the roller 5 is an eccentric pin 11 and is connected via a link 13 to a pretensioning device, which in the present exemplary embodiment is designed as a hydraulic cylinder 14.
  • the biasing device 14, i.e. the hydraulic cylinder is firmly connected to the rocker arm 7 by means of a bearing block 15, the underside of the hydraulic cylinder 14, i.e. the side facing away from the piston rod 16 of the hydraulic cylinder 14 is rotatably mounted on the bearing block 15.
  • the end of the piston rod 16 facing away from the hydraulic cylinder 14 is also provided with a swivel joint, so that the connection between the link 13 and the piston rod 16 of the hydraulic cylinder 14 also takes place by means of a bearing which enables the link 13 to pivot.
  • FIG. 2 shows a side view of the arrangement according to FIG. 1.
  • FIGS. 1 and 2 a second embodiment of the present invention is shown.
  • the same reference numerals are to be used below for components which have already been introduced in connection with FIGS. 1 and 2.
  • double cam 1 On a double cam 1, which has two single cams 2, 3, which are mounted on a common shaft, not shown, two rollers 5, 6 engage and feel the contour of the double cam 1 from.
  • the rocker arm 7 is connected via a swivel joint 9 to a rod 8 which transmits the movements of the rocker arm 7 to the workpiece transport device of the press.
  • the rocker arm 7 itself is rotatably mounted at a point 10.
  • rollers 5, 6 are rotatably mounted in links 13, the links 13 being pivotable about an axis 17.
  • the pivoting movement of the links 13 is achieved by activating the pressing unit 14, which in the present exemplary embodiment is designed as a hydraulic cylinder.
  • rollers 5, 6 are not mounted on eccentric bolts, but on axles 18 with a round cross-sectional area.
  • the pressing movement takes place, as already described, due to the eccentric mounting or the pivoting about the axis of rotation 17 of the links 13.
  • a second position of the rocker arm 7 after pivoting is shown in dashed lines in FIG. 3.
  • the pretensioning device 14 can also advantageously be designed as a pneumatic cylinder or as a mechanical device. It is only important that a sufficiently large pressure is achieved with the pretensioning device 14, which presses the rollers 5, 6 against the circumferential surfaces of the double cam 1 under pretension and thus compensates for the play between the double cam 1 and the rollers 5, 6.

Abstract

In a press the translational movement of gripper rods (8) is produced by rollers (5,6) attached to rotating lever (7) which follow the contours of curve-shaped discs (2,3) rotating about axis (4). At least one of the rollers (5) is pressed into contact with disc (2) via piston/cylinder device (14). <IMAGE>

Description

Die Erfindung betrifft eine Presse mit Greiferschienen zum Umsetzen von Werkstücken in den Bearbeitungsstationen nach der im Oberbegriff des Anspruchs 1 näher definierten Art.The invention relates to a press with gripper rails for moving workpieces in the machining stations according to the type defined in the preamble of claim 1.

Um Pressen möglichst effektiv betreiben zu können, soll ein zu fertigendes Werkstück diese mit möglichst hoher Geschwindigkeit durchlaufen.In order to operate presses as effectively as possible, a workpiece to be manufactured should run through it at the highest possible speed.

Um dies zu ermöglichen, müssen die Werkstücktransporteinrichtungen, die oftmals als Greiferschienen ausgeführt sind, entsprechend schnell bewegt werden. Allerdings sind keine beliebig hohen Geschwindigkeiten möglich, da die Werkstücktransporteinrichtungen meist über Kurvenscheiben bewegt werden, wobei an den Kurvenscheiben Hebel anliegen, welche die Kontur der Kurvenscheibe abtasten. Die hieraus resultierende Bewegung der Hebel wird anschließend in die gewünschte Richtung zum Aufnehmen oder Transportieren des Werkstückes über geeignete Einrichtungen gelenkt.To make this possible, the workpiece transport devices, which are often designed as gripper rails, must be moved correspondingly quickly. However, no arbitrarily high speeds are possible, since the workpiece transport devices are usually moved over cam disks, with levers resting on the cam disks which scan the contour of the cam disk. The resulting movement of the levers is then directed in the desired direction for picking up or transporting the workpiece via suitable devices.

Hierbei tritt das Problem auf, daß bei einer zu hohen Drehzahl der Kurvenscheiben die an diesen anliegenden Hebel nicht mehr vollständig und/oder permanent an der Kurvenscheibe anliegen, sondern aufgrund der auftretenden Flieh- und Trägheitskräfte von der Kurvenscheibe abheben, so daß ein kontrollierter Werkstücktransport innerhalb der Presse nicht mehr möglich ist.The problem that arises here is that if the speed of the cams is too high, the levers on these cams are no longer completely and / or permanently on the Cam plate but rest due to the centrifugal and inertial forces occurring from the cam plate, so that a controlled workpiece transport within the press is no longer possible.

Aus der DE 38 32 499 ist eine Presse mit Greiferschienen bekannt, welche mit Doppelkurvenscheiben versehen ist, wobei die Kontur der Doppelkurvenscheiben von einem Hebel abgetastet wird.From DE 38 32 499 a press with gripper rails is known which is provided with double cam disks, the contour of the double cam disks being scanned by a lever.

Bei der Anordnung nach der genannten Druckschrift tritt allerdings das Problem auf, daß aufgrund von Fertigungstoleranzen, sowohl der Kurvenscheiben als auch des Hebels, ein geringes Spiel beim Abtasten der Kurvenscheiben unvermeidlich ist, wodurch es zu Ungenauigkeiten beim Transport von Werkstücken zwischen den einzelnen Stationen einer Presse kommen kann.In the arrangement according to the cited document, however, the problem arises that due to manufacturing tolerances, both of the cams and the lever, a slight play when scanning the cams is inevitable, causing inaccuracies in the transport of workpieces between the individual stations of a press can come.

Des weiteren besteht bei einer verhältnismäßig hohen Drehzahl der Doppelkurvenscheiben die Gefahr, daß, wie bereits erwähnt, der Hebel nicht mehr permanent an der Doppelkurvenscheibe anliegt und diese abtastet, so daß auch hierdurch ein störungsfreier Transport der Werkstücke zwischen den einzelnen Stationen einer Presse nicht mehr gewährleistet ist.Furthermore, at a relatively high speed of the double cam, there is the risk that, as already mentioned, the lever is no longer in permanent contact with the double cam and scans it, so that faulty transport of the workpieces between the individual stations of a press is no longer guaranteed is.

Aus der DE-OS 21 12 590 ist eine Pressenstraße bekannt, bei der einzelne Baueinheiten der Pressenstraße durch unter der Bodenebene angeordnete Fördereinrichtungen verfahren werden können.From DE-OS 21 12 590 a press line is known in which individual units of the press line can be moved by conveying devices arranged below the floor level.

In der genannten Offenlegungsschrift ist eine Kurvenscheibe beschrieben, an welcher eine mit einer Andrückrolle versehene Schwinge anliegt, welche von einem Pneumatikzylinder gegen die Kurvenscheibe gedrückt wird.In the cited publication, a cam disk is described, on which a rocker provided with a pressure roller bears, which is provided by a Pneumatic cylinder is pressed against the cam.

Die beschriebene Vorrichtung dient jedoch nicht zum Umsetzen von Werkstücken in den Bearbeitungsstationen von Pressen, sondern lediglich zum Verschieben ganzer Baueinheiten einer Pressenstaße.However, the device described is not used for moving workpieces in the processing stations of presses, but only for moving entire structural units of a press line.

Der vorliegenden Erfindung liegt daher die Aufgabe zugrunde, eine Presse mit Greiferschienen zum Umsetzen von Werkstücken in den Bearbeitungsstationen vorzusehen, die die genannten Nachteile des Standes der Technik beseitigt, insbesondere die wirtschaftlich arbeitet und Störungen des Werkstücktransportes zwischen den einzelnen Bearbeitungsstationen einer Presse ausschließt.The present invention is therefore based on the object of providing a press with gripper rails for transferring workpieces in the machining stations, which eliminates the disadvantages of the prior art mentioned, in particular which operates economically and rules out disruptions in workpiece transport between the individual machining stations of a press.

Erfindungsgemäß wird diese Aufgabe durch die im kennzeichnenden Teil des Anspruchs 1 genannten Merkmale gelöst.According to the invention, this object is achieved by the features mentioned in the characterizing part of claim 1.

Durch das Andrücken einer der beiden Rollen gegen die Kurvenscheibe kann jegliches Spiel zwischen Schwinghebel und Rollen und den Kurvenscheiben vermieden werden, so daß auch die gesamte Werkstücktransporteinrichtung fehlerfrei arbeitet. Durch das Vorsehen einer Vorspanneinrichtung, welche eine der beiden Rollen gegen die Kurvenscheiben drückt, können die Kurvenscheiben mit verhältnismäßig hoher Drehzahl betrieben werden, so daß der Durchsatz durch die Presse hindurch erhöht werden kann und die Presse somit wirtschaftlicher arbeitet.By pressing one of the two rollers against the cam disc, any play between the rocker arm and the rollers and the cam discs can be avoided, so that the entire workpiece transport device also works correctly. By providing a pretensioning device which presses one of the two rollers against the cam disks, the cam disks can be operated at a relatively high speed, so that the throughput through the press can be increased and the press thus works more economically.

Vorteilhafte Ausgestaltungen und Weiterbildungen der Erfindung ergeben sich aus den Unteransprüchen und den nachfolgend anhand der Zeichnung prinzipmäßig dargestellten Ausführungsbeispielen.Advantageous refinements and developments of Invention emerge from the subclaims and the exemplary embodiments illustrated in principle below with reference to the drawing.

Es zeigt:

Fig. 1
eine Ansicht eines Schwinghebels, der eine Doppelkurvenscheibe abtastet;
Fig. 2
eine Seitenansicht der Fig. 1, und
Fig. 3
eine Ansicht eines zweiten Ausführungsbeispiels, ähnlich dem in der Fig. 1 dargestellten.
It shows:
Fig. 1
a view of a rocker arm that scans a double cam;
Fig. 2
a side view of Fig. 1, and
Fig. 3
a view of a second embodiment, similar to that shown in FIG. 1.

Bezugnehmend auf Fig. 1 und 2 ist eine Doppelkurvenscheibe 1 dargestellt, die zwei einzelne Kurvenscheiben 2 und 3 aufweist. Die Einzelkurvenscheiben 2, 3 sind auf einer gemeinsamen Welle 4 angeordnet, so daß sie sich synchron bewegen.1 and 2, a double cam plate 1 is shown, which has two individual cam plates 2 and 3. The individual cams 2, 3 are arranged on a common shaft 4 so that they move synchronously.

Zum Abtasten der Konturen der Doppelkurvenscheibe 1 sind zwei Rollen 5, 6 vorgesehen, welche an den jeweiligen Einzelkurvenscheiben 2, 3 anliegen.To scan the contours of the double cam disc 1, two rollers 5, 6 are provided which rest on the respective individual cam discs 2, 3.

Über einen Schwinghebel 7 sowie eine Stange 8 sind die Rollen 5, 6 mit der Werkstücktransporteinrichtung der Presse verbunden.The rollers 5, 6 are connected to the workpiece transport device of the press via a rocker arm 7 and a rod 8.

Die Verbindung zwischen dem Schwinghebel 7 und der Stange 8 erfolgt über ein Drehgelenk 9.The connection between the rocker arm 7 and the rod 8 takes place via a swivel joint 9.

Der Schwinghebel 7 selbst ist an einer Stelle 10 drehbar gelagert. Die Drehachse des Schwinghebels 7 verläuft hierbei parallel zur Axialrichtung der Welle 4.The rocker arm 7 itself is rotatably mounted at a point 10. The axis of rotation of the rocker arm 7 extends parallel to the axial direction of the shaft 4.

Die Rollen 5, 6 sind jeweils auf Bolzen 11, 12 drehbar gelagert. Der Bolzen der Rolle 5 ist ein Exzenterbolzen 11 und über einen Anlenker 13 mit einer Vorspanneinrichtung verbunden, welche in dem vorliegenden Ausführungsbeispiel als Hydraulikzylinder 14 ausgeführt ist.The rollers 5, 6 are each rotatably mounted on bolts 11, 12. The pin of the roller 5 is an eccentric pin 11 and is connected via a link 13 to a pretensioning device, which in the present exemplary embodiment is designed as a hydraulic cylinder 14.

Die Vorspanneinrichtung 14, d.h. der Hydraulikzylinder, ist hierbei mittels eines Lagerbockes 15 mit dem Schwinghebel 7 fest verbunden, wobei die Unterseite des Hydraulikzylinders 14, d.h. die der Kolbenstange 16 des Hydraulikzylinders 14 abgewandte Seite, drehbar auf dem Lagerbock 15 gelagert ist.The biasing device 14, i.e. the hydraulic cylinder is firmly connected to the rocker arm 7 by means of a bearing block 15, the underside of the hydraulic cylinder 14, i.e. the side facing away from the piston rod 16 of the hydraulic cylinder 14 is rotatably mounted on the bearing block 15.

Das dem Hydraulikzylinder 14 abgewandte Ende der Kolbenstange 16 ist ebenfalls mit einem Drehgelenk versehen, so daß auch die Verbindung zwischen dem Anlenker 13 und der Kolbenstange 16 des Hydraulikzylinders 14 mittels eines Lagers, das eine Schwenkbewegung des Anlenkers 13 ermöglicht, erfolgt.The end of the piston rod 16 facing away from the hydraulic cylinder 14 is also provided with a swivel joint, so that the connection between the link 13 and the piston rod 16 of the hydraulic cylinder 14 also takes place by means of a bearing which enables the link 13 to pivot.

Aus Übersichtlichkeitsgründen ist die beschriebene Anordnung mit dem Hydraulikzylinder 14 nur für die Rolle 5 dargestellt. Selbstverständlich kann diese Anordnung, wie beschrieben, auch für die Rolle 6 vorgesehen sein.For reasons of clarity, the arrangement described with the hydraulic cylinder 14 is only shown for the roller 5. Of course, as described, this arrangement can also be provided for the roller 6.

Wird nun die Kolbenstange 16 des Hydraulikzylinders 14 verschoben, so wird aufgrund der exzentrischen Ausführung des Bolzens 11 die Rolle 5 näher an die Einzelkurvenscheibe 3 der Doppelkurvenscheibe 1 herangeführt, so daß das Spiel zwischen der Rolle 5 und der Einzelkurvenscheibe 3 und zwischen der Rolle 6 und der Einzelkurvenscheibe 2 aufgehoben wird. Hierdurch wird eine allzeitige Anlage der Rollen 5, 6 an den Einzelkurvenscheiben 2, 3 erreicht.If the piston rod 16 of the hydraulic cylinder 14 is now displaced, the roller 5 is brought closer to the single cam 3 of the double cam 1 due to the eccentric design of the bolt 11, so that the play between the roller 5 and the Single cam 3 and between the roller 6 and the single cam 2 is canceled. As a result, the rollers 5, 6 are always in contact with the individual cams 2, 3.

Hierdurch wird eine Vorspannung der Rollen 5, 6 gegen die Doppelkurvenscheibe 1 erreicht, wodurch das gesamte Transfersystem für den Transport der Werkstücke zwischen den einzelnen Stationen einer Presse sicher und mit einer verhältnismäßig hohen Drehzahl der Doppelkurvenscheibe 1 betrieben werden kann, so daß die Wirtschaftlichkeit einer mit der beschriebenen Vorrichtung ausgerüsteten Presse gesteigert werden kann.In this way, a preload of the rollers 5, 6 against the double cam 1 is achieved, whereby the entire transfer system for the transport of the workpieces between the individual stations of a press can be operated safely and at a relatively high speed of the double cam 1, so that the economy of a equipped device described press can be increased.

Fig. 2 zeigt eine Seitenansicht der Anordnung nach der Fig. 1.FIG. 2 shows a side view of the arrangement according to FIG. 1.

In dieser Ansicht ist der Versatz der Rollen 5, 6 sehr gut zu erkennen. Des weiteren kann der Fig. 2 entnommen werden, daß der Schwinghebel 7 hohl ausgeführt ist, so daß in den Hohlräumen des Schwinghebels 7 die Lagerstellen für die Rollen 5, 6 sowie für den Drehpunkt 10 des Schwinghebels 7 vorgesehen werden können.In this view, the offset of the rollers 5, 6 can be seen very well. 2 that the rocker arm 7 is hollow, so that the bearings for the rollers 5, 6 and for the pivot point 10 of the rocker arm 7 can be provided in the cavities of the rocker arm 7.

Bezugnehmend auf Fig. 3 ist ein zweites Ausführungsbeispiel der vorliegenden Erfindung dargestellt. Für bereits im Zusammenhang mit den Fig. 1 und 2 eingeführte Bauteile sollen nachfolgend dieselben Bezugszeichen verwendet werden.3, a second embodiment of the present invention is shown. The same reference numerals are to be used below for components which have already been introduced in connection with FIGS. 1 and 2.

An einer Doppelkurvenscheibe 1, die zwei Einzelkurvenscheiben 2, 3 aufweist, welche auf einer gemeinsamen, nicht dargestellten Welle gelagert sind, greifen zwei Rollen 5, 6 an und tasten die Kontur der Doppelkurvenscheibe 1 ab.On a double cam 1, which has two single cams 2, 3, which are mounted on a common shaft, not shown, two rollers 5, 6 engage and feel the contour of the double cam 1 from.

Der Schwinghebel 7 ist über ein Drehgelenk 9 mit einer Stange 8 verbunden, welche die Bewegungen des Schwinghebels 7 an die Werkstücktransporteinrichtung der Presse überträgt.The rocker arm 7 is connected via a swivel joint 9 to a rod 8 which transmits the movements of the rocker arm 7 to the workpiece transport device of the press.

Der Schwinghebel 7 selbst ist an einer Stelle 10 drehbar gelagert.The rocker arm 7 itself is rotatably mounted at a point 10.

Die Rollen 5, 6 sind in Anlenkern 13 drehbar gelagert, wobei die Anlenker 13 um eine Achse 17 verschwenkbar sind.The rollers 5, 6 are rotatably mounted in links 13, the links 13 being pivotable about an axis 17.

Die Schwenkbewegung der Anlenker 13 wird durch eine Aktivierung der Andrückeinheit 14, die im vorliegenden Ausführungsbeispiel als Hydraulikzylinder ausgeführt ist, erreicht.The pivoting movement of the links 13 is achieved by activating the pressing unit 14, which in the present exemplary embodiment is designed as a hydraulic cylinder.

Aufgrund der exzentrischen Lagerung der Anlenker 13 (Achse 17) werden die Rollen 5, 6 gegen die Umfangsflächen der Doppelkurvenscheibe 1 gedrückt, wodurch jegliches Spiel vermieden wird.Due to the eccentric mounting of the links 13 (axis 17), the rollers 5, 6 are pressed against the circumferential surfaces of the double cam plate 1, whereby any play is avoided.

In diesem Fall sind die Rollen 5, 6 nicht auf Exzenterbolzen, sondern auf Achsen 18 mit runder Querschnittsfläche gelagert. Die Andrückbewegung erfolgt, wie bereits beschrieben, aufgrund der exzentrischen Lagerung bzw. der Verschwenkung um die Drehachse 17 der Anlenker 13.In this case, the rollers 5, 6 are not mounted on eccentric bolts, but on axles 18 with a round cross-sectional area. The pressing movement takes place, as already described, due to the eccentric mounting or the pivoting about the axis of rotation 17 of the links 13.

Eine zweite Position des Schwinghebels 7 nach dem Verschwenken ist in der Fig. 3 gestrichelt dargestellt.A second position of the rocker arm 7 after pivoting is shown in dashed lines in FIG. 3.

Aus Übersichtlichkeitsgründen ist auch in der Fig. 3 die beschriebene Anordnung nur für die Rolle 5 dargestellt. Selbstverständlich ist es jedoch auch möglich, dieselbe Anordnung für die Rolle 6 zusätzlich vorzusehen, oder die beschriebene Anordnung nur an der Rolle 6 anzubringen.For reasons of clarity, the arrangement described is only shown for the roller 5 in FIG. 3. Of course, however, it is also possible to additionally provide the same arrangement for the roller 6, or to attach the described arrangement only to the roller 6.

Anstatt als Hydraulikzylinder kann die Vorspanneinrichtung 14 auch vorteilhaft als Pneumatikzylinder oder als mechanische Einrichtung ausgeführt sein. Wichtig ist nur, daß ein ausreichend großer Druck mit der Vorspanneinrichtung 14 erzielt wird, welcher die Rollen 5, 6 gegen die Umfangsflächen der Doppelkurvenscheibe 1 unter Vorspannung drückt und somit das Spiel zwischen der Doppelkurvenscheibe 1 und den Rollen 5, 6 ausgleicht.Instead of being a hydraulic cylinder, the pretensioning device 14 can also advantageously be designed as a pneumatic cylinder or as a mechanical device. It is only important that a sufficiently large pressure is achieved with the pretensioning device 14, which presses the rollers 5, 6 against the circumferential surfaces of the double cam 1 under pretension and thus compensates for the play between the double cam 1 and the rollers 5, 6.

Claims (6)

Presse mit Greiferschienen zum Umsetzen von Werkstücken in den Bearbeitungsstationen, mit einem Motor und einer von diesem bewegten Welle, auf die Kurvenscheiben aufgesetzt sind, mit Schwinghebeln zum Abgriff deren Kurvenform und Verbindungslaschen zum Umlenken der Bewegungen der Schwinghebel in Antriebsbewegungen der Greiferschienen, wobei an den Schwinghebeln wenigstens zwei Rollen drehbar gelagert sind, die auf den Kurvenscheiben laufen, dadurch gekennzeichnet, daß eine der beiden Rollen (5,6) spielfrei an eine der Kurvenscheiben (2,3) durch eine Vorspanneinrichtung (14) anpreßbar ist.Press with gripper rails for transferring workpieces in the machining stations, with a motor and a shaft moved by this, on which cam disks are fitted, with rocker arms for tapping off their curve shape and connecting straps for deflecting the movements of the rocker arms into drive movements of the gripper rails, with the rocker arms at least two rollers are rotatably mounted which run on the cam disks, characterized in that one of the two rollers (5, 6) can be pressed against one of the cam disks (2, 3) without play by a pretensioning device (14). Presse nach Anspruch 1,
dadurch gekennzeichnet, daß die Vorspanneinrichtung ein hydraulisches System (14) ist.Press according to claim 1,
characterized in that the pretensioning device is a hydraulic system (14). Presse nach Anspruch 1,
dadurch gekennzeichnet, daß die Vorspanneinrichtung (14) ein pneumatisches System ist.Press according to claim 1,
characterized in that the biasing device (14) is a pneumatic system. Presse nach Anspruch 1,
dadurch gekennzeichnet, daß die Vorspanneinrichtung (14) ein mechanisches System ist.Press according to claim 1,
characterized in that the biasing means (14) is a mechanical system. Presse nach einem der Ansprüche 1 bis 4,
dadurch gekennzeichnet, daß eine der Rollen (5,6) auf einem Exzenterbolzen (11), welcher drehbar gelagert ist, angeordnet ist, wobei der Exzenterbolzen (11) auf einem Anlenker (13) vorgesehen ist, wobei bei einer Aktivierung der Vorspanneinrichtung (14) eine der Rollen (5,6) in Richtung auf eine der Kurvenscheiben (2,3) bewegbar ist, während die andere der Rollen (5,6) sich an der zweiten Kurvenscheibe (2,3) abstützt.Press according to one of claims 1 to 4,
characterized in that one of the rollers (5, 6) is arranged on an eccentric bolt (11) which is rotatably mounted, the eccentric bolt (11) being provided on a link (13), with the pretensioning device (14 ) one of the rollers (5, 6) can be moved in the direction of one of the cams (2, 3), while the other of the rollers (5, 6) is supported on the second cam (2, 3). Presse nach einem der Ansprüche 1 bis 4,
dadurch gekennzeichnet, daß ein Anlenker (13) bezüglich seines Drehpunktes exzentrisch verschwenkbar gelagert ist, wobei bei einer Aktivierung der Vorspanneinrichtung (14) eine der Rollen (5,6) in Richtung auf die Kurvenscheiben (2,3) verschwenkbar ist.Press according to one of claims 1 to 4,
characterized in that a link (13) is pivotally mounted eccentrically with respect to its pivot point, one of the rollers (5, 6) being pivotable in the direction of the cam discs (2, 3) when the pretensioning device (14) is activated.
EP95111056A 1994-07-20 1995-07-14 Press with transfer bars Expired - Lifetime EP0693332B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4425560A DE4425560A1 (en) 1994-07-20 1994-07-20 Press with gripper rails
DE4425560 1994-07-20

Publications (2)

Publication Number Publication Date
EP0693332A1 true EP0693332A1 (en) 1996-01-24
EP0693332B1 EP0693332B1 (en) 1999-10-27

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EP95111056A Expired - Lifetime EP0693332B1 (en) 1994-07-20 1995-07-14 Press with transfer bars

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US (1) US5718152A (en)
EP (1) EP0693332B1 (en)
CZ (1) CZ284421B6 (en)
DE (2) DE4425560A1 (en)
ES (1) ES2140586T3 (en)

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Publication number Priority date Publication date Assignee Title
KR100454451B1 (en) * 1999-07-29 2004-10-28 하테부르 움포름마쉬넨 아크티엔게젤샤프트 Device for producing a lifting and lowering movement
GB2371283B (en) * 2000-12-22 2005-03-02 Vitec Group Plc Devices for providing torque resistance
US6736096B2 (en) * 2002-02-21 2004-05-18 Delphi Technologies, Inc. Method and apparatus for setting valve lift within a cylinder

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US3596498A (en) * 1968-12-27 1971-08-03 Textron Inc Press
DE2112590A1 (en) 1971-03-16 1972-10-12 Weingarten Ag Maschf Press line
DE3725310A1 (en) * 1986-08-08 1988-02-11 Sumitomo Heavy Industries MECHANICAL REPLACEMENT
JPH01237030A (en) * 1988-03-18 1989-09-21 Ishikawajima Harima Heavy Ind Co Ltd Device for driving feed of transfer press
DE3832499A1 (en) 1988-09-24 1990-03-29 Schuler Gmbh L PRESS WITH GRIPPER RAILS

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US2266081A (en) * 1940-03-23 1941-12-16 Jay T Rogers Melting pot discharge valve operating means
US2558679A (en) * 1947-05-07 1951-06-26 Nouvelle Soc De Construction C Cam and follower mechanism
FR1101917A (en) * 1953-06-09 1955-10-12 Cam mechanism
US3116923A (en) * 1960-09-09 1964-01-07 Maschf Augsburg Nuernberg Ag Sheet advancing drive for printing presses
US3585837A (en) * 1969-01-27 1971-06-22 Otto Bihler Enforced cam guidance for tool carriers
DE3913663A1 (en) * 1989-04-26 1990-10-31 Schuler Gmbh L CONVERSION DEVICE IN A TRANSFER PRESS OR THE LIKE. FORMING MACHINE
DE3922532C1 (en) * 1989-07-08 1990-10-04 Wafios Maschinenfabrik Gmbh & Co Kg, 7410 Reutlingen, De

Patent Citations (5)

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Publication number Priority date Publication date Assignee Title
US3596498A (en) * 1968-12-27 1971-08-03 Textron Inc Press
DE2112590A1 (en) 1971-03-16 1972-10-12 Weingarten Ag Maschf Press line
DE3725310A1 (en) * 1986-08-08 1988-02-11 Sumitomo Heavy Industries MECHANICAL REPLACEMENT
JPH01237030A (en) * 1988-03-18 1989-09-21 Ishikawajima Harima Heavy Ind Co Ltd Device for driving feed of transfer press
DE3832499A1 (en) 1988-09-24 1990-03-29 Schuler Gmbh L PRESS WITH GRIPPER RAILS

Non-Patent Citations (1)

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Title
PATENT ABSTRACTS OF JAPAN vol. 013, no. 565 (M - 907) 14 December 1989 (1989-12-14) *

Also Published As

Publication number Publication date
DE4425560A1 (en) 1996-01-25
CZ284421B6 (en) 1998-11-11
CZ185995A3 (en) 1996-02-14
US5718152A (en) 1998-02-17
DE59507126D1 (en) 1999-12-02
ES2140586T3 (en) 2000-03-01
EP0693332B1 (en) 1999-10-27

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