EP0770437A1 - Punching tool with holding means for stripper plate - Google Patents

Punching tool with holding means for stripper plate Download PDF

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Publication number
EP0770437A1
EP0770437A1 EP96115920A EP96115920A EP0770437A1 EP 0770437 A1 EP0770437 A1 EP 0770437A1 EP 96115920 A EP96115920 A EP 96115920A EP 96115920 A EP96115920 A EP 96115920A EP 0770437 A1 EP0770437 A1 EP 0770437A1
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EP
European Patent Office
Prior art keywords
stripper plate
punching tool
punch
punching
tool according
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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
EP96115920A
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German (de)
French (fr)
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EP0770437B1 (en
Inventor
Albrecht Schneider
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Mate Precision Tooling GmbH
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Mate Precision Tooling GmbH
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Publication of EP0770437A1 publication Critical patent/EP0770437A1/en
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Publication of EP0770437B1 publication Critical patent/EP0770437B1/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
    • B21D45/00—Ejecting or stripping-off devices arranged in machines or tools dealt with in this subclass
    • B21D45/003—Ejecting or stripping-off devices arranged in machines or tools dealt with in this subclass in punching machines or punching tools
    • B21D45/006—Stripping-off devices

Definitions

  • the invention relates to a punching tool with a guide bushing which receives a punch which can be dismantled downwards and carries a stripper plate which can be fixed in the engagement area of the punching punch by holding members to be attached to the guide bushing and can be removed axially from the punching punch after the holding members have been released.
  • the stripper plate is inserted into the guide bushing over the already installed punching punch and secured in the axial direction with the aid of retaining plates which are screwed onto the guide bushing.
  • punching tools it is often necessary to replace the punch and / or the stripper plate during operation. For this purpose, it is always necessary to remove all the holding plates, which has proven to be very cumbersome and time-consuming, not least because of the small and therefore difficult-to-handle fastening screws.
  • a simple mounting of the scraper plate is known from punching tools, in which the punch is removed upward from the guide bush.
  • the scraper plate is inserted into a guide that is open on the side, so that it is free after removal of the punch and can therefore be easily removed.
  • the stripper plate since in a punching tool of the type described in the introduction, the stripper plate must first be removed so that the punch can also be removed, such a holder cannot be used here.
  • the object of the invention is to provide a punching tool of the type described at the outset, which has a holder for the stripper plate, which enables the stripper plate and the punch to be removed much more quickly and easily.
  • the object is achieved in that the holding members are movably mounted on the guide bushing and are movable between a position that locks the stripper plate and a position that releases it.
  • the stripper plate is received by a movable holding device which can be disengaged from the engagement area of the stamp into a position in the punching direction from the operating position of the stripper plate, in which the holding members lock the stripper plate and the holding device which the stripper plate can be removed from the side from a guide attached to the holding device and which centers the stripper plate relative to the guide bush.
  • the movable holding device makes it easier to insert the scraper plate because it centers the scraper plate on the guide when it is inserted laterally to the guide bush and makes it easier for the fitter to thread the tightly fitting stripper plate onto the punch.
  • An elastic element expediently supports the disengagement movement of the holding device. As a result, after the holding members have been actuated, the holding device jumps away from the guide bush with the wiper plate downward. Without this support of the disengagement movement, it would be necessary to grip the holding device or the stripper plate and pull it away from the guide bush.
  • the holding members are rocker arms with holding lugs, by their one-sided pressing against a spring force the stripper plate and thus the holding device can be unlocked.
  • the advantage of the rocker arm is its easy handling.
  • the holding members expediently have safeguards against unintentional opening.
  • FIG. 1 shows a punching tool 10 for a turret punch made by Amada. It essentially consists of a guide bush 12, a punch (not shown) accommodated therein, a punch driver, of which only a stamp driver head 14 can be seen in FIG. 1, and a stripper plate 16 which is attached to the guide bush 12 via a holding device 18 is. Between the punch driver head 14 and an edge flange 20 belonging to the guide bushing 12, a plurality of series springs 22 are provided, which move the punch back into its starting position after the punching process.
  • the wiper plate 16 has on its outer circumference an annular groove 24 which is guided on a guide bead 26 (FIG. 2) extending over 180 ° and is held centrally in the holding device 18.
  • the holding device 18 is in turn guided with axial projections in two diametrically opposite, groove-like recesses 28 in the guide bushing 12, which enable the holder to be axially displaceable in the punching direction.
  • the displacement path of the holding device 18 is limited by a stop bolt 30 in each recess 28, which is fastened to the guide bush 12 transversely to the punching direction and engages in an axially extending groove 32 in each projection of the holding device 18.
  • the wiper plate 16 and the holding device 18 are axially immovably held by two diametrically opposed rocker arms 34 with holding lugs 36 which engage in the annular groove 24.
  • One of the rocker arms 34 is arranged in the middle of the opening of the guide bead 26, which extends in a horseshoe shape over 180 ° of the circumference of the stripper plate 16, the other engages through a recess corresponding to its width in the peripheral wall of the Holder device 18 into the annular groove 24. Possibly. more holding members can also be provided. This can improve grip, but handling becomes more difficult.
  • An annular part 38 of the holding device 18 lies in the closed state of the holder 18 on the underside of the guide bush 12 and thereby ensures an exact positioning of the wiper plate 16.
  • the rocker arms 34 are pivotable about a pivot bearing 40, so that by pressing the rocker arm 34 against the force of a locking spring 42, the retaining lugs 36 located on the other side of the pivot bearing 40 can be moved radially outward into a position that releases the stripper plate 16.
  • a locking member 44 which is axially displaceable in the tool direction is provided on each rocker arm 34, which engages with a locking shoulder 46 under the actuating side of the rocker arm 34 and blocks it.
  • the securing member 44 is preloaded in the direction of the closed position by a spring 48.
  • an unlocking slide 50 is provided, which is arranged on the actuating side of the rocker arm 34 so as to be displaceable in the direction of displacement of the securing member 44.
  • the unlocking slide 50 has a U-shaped profile and engages a projection 52 of the securing member 44.
  • the unlocking slide 50 does not hinder the depression of the rocker arm 34 when the securing member 44 has been moved over the projection 52 into a position which is free of the rocker arm 34.
  • the stripper plate 16 is removed in such a way that the locking member 44 is first moved with the unlocking slide 50 until the locking shoulder 46 releases the rocker arm 34. Now the rocker arm 34 can be pivoted about the pivot bearing 40 against the force of the locking spring 42, so that the retaining lugs 36 release the wiper plate 16.
  • the position of the unlocking slide 50 on the rocker arm 34 allows easy handling, since both the unlocking and the actuation of the rocker arm can be carried out with one finger. Accidental triggering of the rocker arm 34, for example by an impact, is not possible.
  • release springs 54 via ejection bolts 56 ensure that the holding device 18 disengages with the wiper plate 16 downward from the guide bush 12 (see FIG. 2).
  • the disengagement movement of the holding device 18 is limited by the stop bolt 30, which bears against the upper end of the groove 32.
  • the annular part 38 holds the rocker arms 34 in their open position so that they do not hinder the later pushing in of the holding device.
  • the guide bead 26 in the holding device 18 comprises the scraper plate 16 in a horseshoe shape, ie only over its half circumference, so that in the disengaged position of the holding device 18 it moves laterally out of the opening of the horseshoe-shaped guide bead 26, axially at the end of the one, in the area of the opening arranged rocker arm 34 is pulled out.
  • the holding device 18 must at least move out of the guide bush 12 so that the stripper plate 16 is no longer in the engagement area of the punch.
  • stripper plate 16 After the stripper plate 16 has been removed, it can also be removed.
  • the punching tool 10 is assembled in the reverse direction. After the punch has been installed in the guide bushing 12, the stripper plate 16 is pushed laterally into the guide bead 26 of the holding device 18 until in the end position it assumes a position centered with respect to the guide bushing 12. The holding device is then pushed against the force of the release springs 54 against the guide bush 12. When the final position of the wiper plate 16 is reached, the rocker arms 34 snap into the annular groove 24 of the wiper plate 16 with their retaining lugs 36 due to the force of the locking springs 42. At the same time, the springs 48 press the locking members 44 with their shoulders 46 under the rocker arms, so that the wiper plate 16 is locked and secured.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Punching Or Piercing (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)

Abstract

The tool has a guide bush (12), which accepts a stamping die which can extend downwards in the direction of stamping. It also supports a reinforcement plate (16), which can be fixed in the engagement region of the die, using retaining links (34,36) which are fixed to the bush. The plate can be removed axially from the die after the links are released. The retaining links are mounted on the guide bush so that they can be moved, between a position in which the plate is locked in place, and a position in which it is released.

Description

Die Erfindung betrifft ein Stanzwerkzeug mit einer Führungsbüchse, die einen nach unten ausbaubaren Stanzstempel aufnimmt und eine Abstreiferplatte trägt, die durch an der Führungsbüchse anzubringende Halteglieder im Eingriffsbereich des Stanzstempels festlegbar und nach dem Lösen der Halteglieder axial vom Stanzstempel abziehbar ist.The invention relates to a punching tool with a guide bushing which receives a punch which can be dismantled downwards and carries a stripper plate which can be fixed in the engagement area of the punching punch by holding members to be attached to the guide bushing and can be removed axially from the punching punch after the holding members have been released.

Bei Stanzwerkzeugen dieser Art wird die Abstreiferplatte über den bereits montierten Stanzstempel in die Führungsbüchse eingesetzt und mit Hilfe von Halteblechen, die an der Führungsbüchse festgeschraubt werden, in axialer Richtung gesichert. Während des Betriebes ist es bei Stanzwerkzeugen oftmals notwendig, den Stanzstempel und/oder die Abstreiferplatte auszutauschen. Dazu ist jedesmal ein Entfernen aller Haltebleche notwendig, was sich nicht zuletzt wegen der kleinen und deswegen schlecht handhabbaren Befestigungsschrauben als sehr umständlich und zeitaufwendig erwiesen hat.In the case of punching tools of this type, the stripper plate is inserted into the guide bushing over the already installed punching punch and secured in the axial direction with the aid of retaining plates which are screwed onto the guide bushing. With punching tools, it is often necessary to replace the punch and / or the stripper plate during operation. For this purpose, it is always necessary to remove all the holding plates, which has proven to be very cumbersome and time-consuming, not least because of the small and therefore difficult-to-handle fastening screws.

Eine einfache Halterung der Abstreiferplatte ist von Stanzwerkzeugen bekannt, bei welchen der Stanzstempel nach oben aus der Führungsbüchse ausgebaut wird. Die Abstreiferplatte ist in eine seitlich offene Führung eingeschoben, so daß sie nach dem Ausbau des Stanzstempels frei ist und dementsprechend leicht ausgebaut werden kann. Da bei einem Stanzwerkzeug der eingangs beschriebenen Art jedoch zunächst die Abstreiferplatte ausgebaut werden muß, um auch den Stanzstempel entfernen zu können, ist hier eine solche Halterung nicht anwendbar.A simple mounting of the scraper plate is known from punching tools, in which the punch is removed upward from the guide bush. The scraper plate is inserted into a guide that is open on the side, so that it is free after removal of the punch and can therefore be easily removed. However, since in a punching tool of the type described in the introduction, the stripper plate must first be removed so that the punch can also be removed, such a holder cannot be used here.

Die Aufgabe der Erfindung besteht darin, ein Stanzwerkzeug der eingangs bezeichneten Art zu schaffen, das eine Halterung der Abstreiferplatte aufweist, die einen wesentlich schnelleren und einfacheren Ausbau der Abstreiferplatte und des Stanzstempels ermöglicht.The object of the invention is to provide a punching tool of the type described at the outset, which has a holder for the stripper plate, which enables the stripper plate and the punch to be removed much more quickly and easily.

Erfindungsgemäß wird die Aufgabe dadurch gelöst, daß die Halteglieder an der Führungsbüchse beweglich gelagert und zwischen einer die Abstreiferplatte arretierenden und einer sie freigebenden Stellung bewegbar sind.According to the invention the object is achieved in that the holding members are movably mounted on the guide bushing and are movable between a position that locks the stripper plate and a position that releases it.

Der Vorteil eines solchen Stanzwerkzeuges besteht darin, daß zum Wechsel des Stanzstempels und der Abstreiferplatte kein umständliches Lösen und Festziehen der Schrauben mittels eines Werkzeugs erforderlich ist, wobei bisher insbesondere das Wiedereinfädeln der kleinen Befestigungsschrauben den Monteur oft vor eine Geduldsprobe stellte. Mit den erfindungsgemäßen Haltgliedern hingegen ist ein einfaches Entriegeln und Arretieren der Abstreiferplatte möglich.The advantage of such a punching tool is that changing the punch and the stripper plate does not require laborious loosening and tightening of the screws by means of a tool, so far in particular the re-threading of the small fastening screws has often given the fitter a test of patience. With the retaining members according to the invention, however, a simple unlocking and locking of the stripper plate is possible.

In bevorzugter Ausgestaltung der Erfindung ist vorgesehen, daß die Abstreiferplatte von einer beweglichen Haltevorrichtung aufgenommen ist, die von der Betriebsstellung der Abstreiferplatte, in welcher die Halteglieder die Abstreiferplatte und die Haltevorrichtung arretieren, in Stanzrichtung aus dem Eingriffsbereich des Stempels in eine Stellung ausrückbar ist, in welcher die Abstreiferplatte aus einer an der Haltevorrichtung angebrachten Führung, welche die Abstreiferplatte zur Führungsbüchse zentriert, seitlich entnehmbar ist.In a preferred embodiment of the invention it is provided that the stripper plate is received by a movable holding device which can be disengaged from the engagement area of the stamp into a position in the punching direction from the operating position of the stripper plate, in which the holding members lock the stripper plate and the holding device which the stripper plate can be removed from the side from a guide attached to the holding device and which centers the stripper plate relative to the guide bush.

Die bewegliche Haltevorrichtung erleichtert das Einlegen der Abstreiferplatte, da sie über die Führung die Abstreiferplatte beim seitlichen Einschieben zur Führungsbüchse zentriert und dem Monteur das zeitaufwendige Einfädeln der enggepaßten Abstreiferplatte auf den Stanzstempel erleichtert.The movable holding device makes it easier to insert the scraper plate because it centers the scraper plate on the guide when it is inserted laterally to the guide bush and makes it easier for the fitter to thread the tightly fitting stripper plate onto the punch.

Zweckmäßigerweise unterstützt ein elastisches Element die Ausrückbewegung der Haltevorrichtung. Dadurch springt nach dem Betätigen der Halteglieder die Haltevorrichtung mit der Abstreiferplatte nach unten von der Führungsbüchse weg. Ohne diese Unterstützung der Ausrückbewegung wäre es notwendig, die Haltevorrichtung oder die Abstreiferplatte zu greifen und von der Führungsbüchse weg zu ziehen.An elastic element expediently supports the disengagement movement of the holding device. As a result, after the holding members have been actuated, the holding device jumps away from the guide bush with the wiper plate downward. Without this support of the disengagement movement, it would be necessary to grip the holding device or the stripper plate and pull it away from the guide bush.

In weiterer bevorzugter Ausgestaltung der Erfindung ist vorgesehen, daß die Halteglieder Kipphebel mit Haltenasen sind, durch deren einseitiges Niederdrücken gegen eine Federkraft die Abstreiferplatte und damit auch die Haltevorrichtung entriegelbar ist. Gegenüber anderen, prinzipiell ebenfalls verwendbaren Verriegelungsmechanismen, wie z. B. Drehfallen oder einfachen Sicherungsbolzen, besteht der Vorteil der Kipphebel in ihrer einfachen Handhabung. Um ein versehentliches Entriegeln der Abstreiferplatte zu vermeiden, weisen die Halteglieder zweckmäßigerweise Sicherungen gegen unbeabsichtigtes Öffnen auf.In a further preferred embodiment of the invention it is provided that the holding members are rocker arms with holding lugs, by their one-sided pressing against a spring force the stripper plate and thus the holding device can be unlocked. Compared to other locking mechanisms that can also be used in principle, such as. B. rotary latches or simple safety bolts, the advantage of the rocker arm is its easy handling. In order to avoid inadvertent unlocking of the scraper plate, the holding members expediently have safeguards against unintentional opening.

Nachstehend wird anhand der beigefügten Zeichnungen näher auf ein Ausführungsbeispiel der Erfindung eingegangen. Es zeigen:

Fig. 1
einen Querschnitt durch ein Stanzwerkzeug mit verriegelter Abstreiferplatte;
Fig. 2
einen Querschnitt durch das Stanzwerkzeug nach Fig. 1 mit entriegelter Abstreiferplatte.
An exemplary embodiment of the invention is described in more detail below with reference to the accompanying drawings. Show it:
Fig. 1
a cross section through a punch with locked wiper plate;
Fig. 2
a cross section through the punching tool according to FIG. 1 with the stripper plate unlocked.

Fig. 1 zeigt ein Stanzwerkzeug 10 für eine Revolverstanze des Fabrikats Amada. Es besteht im wesentlichen aus einer Führungsbüchse 12, einem darin aufgenommenen Stanzstempel (nicht gezeigt), einem Stempeltreiber, von welchem in Fig.1 nur ein Stempeltreiberkopf 14 zu sehen ist, und einer Abstreiferplatte 16, die über eine Haltevorrichtung 18 an der Führungsbüchse 12 angebracht ist. Zwischen dem Stempeltreiberkopf 14 und einem der Führungsbüchse 12 zugehörigen Randflansch 20 sind mehrere in Serie geschaltete Tellerfedern 22 vorgesehen, die den Stanzstempel nach dem Stanzvorgang wieder in seine Ausgangsstellung bewegen.1 shows a punching tool 10 for a turret punch made by Amada. It essentially consists of a guide bush 12, a punch (not shown) accommodated therein, a punch driver, of which only a stamp driver head 14 can be seen in FIG. 1, and a stripper plate 16 which is attached to the guide bush 12 via a holding device 18 is. Between the punch driver head 14 and an edge flange 20 belonging to the guide bushing 12, a plurality of series springs 22 are provided, which move the punch back into its starting position after the punching process.

Die Abstreiferplatte 16 besitzt an ihrem äußeren Umfang eine Ringnut 24, die an einem sich über 180° erstreckenden Führungswulst 26 (Fig.2) geführt und zentrisch in der Haltevorrichtung 18 gehalten ist. Die Haltevorrichtung 18 ist ihrerseits mit axialen Vorsprüngen in zwei diametral gegenüberliegenden, nutartigen Ausnehmungen 28 in der Führungsbüchse 12 geführt, die eine axiale Verschiebbarkeit der Halterung in Stanzrichtung ermöglichen. Begrenzt wird der Verschiebeweg der Haltevorrichtung 18 durch jeweils einen Anschlagbolzen 30 in jeder Ausnehmung 28, der quer zur Stanzrichtung an der Führungsbüchse 12 befestigt ist und in eine axial verlaufende Nut 32 in jedem Vorsprung der Haltevorrichtung 18 eingreift.The wiper plate 16 has on its outer circumference an annular groove 24 which is guided on a guide bead 26 (FIG. 2) extending over 180 ° and is held centrally in the holding device 18. The holding device 18 is in turn guided with axial projections in two diametrically opposite, groove-like recesses 28 in the guide bushing 12, which enable the holder to be axially displaceable in the punching direction. The displacement path of the holding device 18 is limited by a stop bolt 30 in each recess 28, which is fastened to the guide bush 12 transversely to the punching direction and engages in an axially extending groove 32 in each projection of the holding device 18.

Im eingebauten Zustand werden die Abstreiferplatte 16 und die Haltevorrichtung 18 von zwei diametral gegenüberliegenden Kipphebeln 34 mit Haltenasen 36, die in die Ringnut 24 eingreifen, axial unverschieblich festgehalten. Einer der Kipphebel 34 ist mitten in der Öffnung des sich hufeisenförmig über 180° des Umfangs der Abstreiferplatte 16 erstreckenden Führungswulsts 26 angeordnet, der andere greift durch eine seiner Breite entsprechende Aussparung in der Umfangwand der Haltervorrichtung 18 hindurch in die Ringnut 24 ein. Ggf. können auch mehr Halteglieder vorgesehen sein. Dadurch läßt sich der Halt verbessern, die Handhabung wird jedoch schwieriger. Ein ringförmiger Teil 38 der Haltevorrichtung 18 liegt in geschlossenem Zustand der Halterung 18 an der Unterseite der Führungsbüchse 12 an und sorgt dadurch für eine exakte Positionierung der Abstreiferplatte 16.In the installed state, the wiper plate 16 and the holding device 18 are axially immovably held by two diametrically opposed rocker arms 34 with holding lugs 36 which engage in the annular groove 24. One of the rocker arms 34 is arranged in the middle of the opening of the guide bead 26, which extends in a horseshoe shape over 180 ° of the circumference of the stripper plate 16, the other engages through a recess corresponding to its width in the peripheral wall of the Holder device 18 into the annular groove 24. Possibly. more holding members can also be provided. This can improve grip, but handling becomes more difficult. An annular part 38 of the holding device 18 lies in the closed state of the holder 18 on the underside of the guide bush 12 and thereby ensures an exact positioning of the wiper plate 16.

Die Kipphebel 34 sind um ein Drehlager 40 schwenkbar, so daß durch Niederdrücken des Kipphebels 34 gegen die Kraft einer Arretierfeder 42 die auf der anderen Seite des Drehlagers 40 gelegenen Haltenasen 36 radial nach außen, in eine die Abstreiferplatte 16 freigebende Stellung bewegbar sind.The rocker arms 34 are pivotable about a pivot bearing 40, so that by pressing the rocker arm 34 against the force of a locking spring 42, the retaining lugs 36 located on the other side of the pivot bearing 40 can be moved radially outward into a position that releases the stripper plate 16.

Um ein versehentliches Entriegeln der Abstreiferplatte 16 zu verhindern, ist an jedem Kipphebel 34 ein in Werkzeugrichtung axial verschiebliches Sicherungsglied 44 vorgesehen, das mit einem Sicherungsabsatz 46 unter die Betätigungsseite des Kipphebels 34 greift und diesen blockiert. Das Sicherungsglied 44 wird in Richtung der geschlossenen Stellung von einer Feder 48 vorbelastet. Zur Entriegelung des Sicherungsgliedes 44 ist ein Entriegelungsschieber 50 vorgesehen, der auf der Betätigungsseite des Kipphebels 34 in der Verschieberichtung des Sicherungsgliedes 44 verschieblich angeordnet ist. Der Entriegelungsschieber 50 besitzt ein U-förmiges Profil und greift an einen Vorsprung 52 des Sicherungsgliedes 44 an. Dank seines U-förmigen Profils, dessen Stege jeweils seitlich des Sicherungsabsatzes 46 liegen, behindert der Entriegelungsschieber 50 das Niederdrücken des Kipphebels 34 nicht, wenn das Sicherungsglied 44 über den Vorsprung 52 in eine den Kipphebel 34 freigebene Stellung verschoben wurde.In order to prevent inadvertent unlocking of the wiper plate 16, a locking member 44 which is axially displaceable in the tool direction is provided on each rocker arm 34, which engages with a locking shoulder 46 under the actuating side of the rocker arm 34 and blocks it. The securing member 44 is preloaded in the direction of the closed position by a spring 48. To unlock the securing member 44, an unlocking slide 50 is provided, which is arranged on the actuating side of the rocker arm 34 so as to be displaceable in the direction of displacement of the securing member 44. The unlocking slide 50 has a U-shaped profile and engages a projection 52 of the securing member 44. Thanks to its U-shaped profile, the webs of which are located to the side of the securing shoulder 46, the unlocking slide 50 does not hinder the depression of the rocker arm 34 when the securing member 44 has been moved over the projection 52 into a position which is free of the rocker arm 34.

Der Ausbau der Abstreiferplatte 16 erfolgt in der Weise, daß man zunächst mit dem Entriegelungsschieber 50 das Sicherungsglied 44 verschiebt, bis der Sicherungsabsatz 46 den Kipphebel 34 freigibt. Nun kann der Kipphebel 34 um das Drehlager 40 gegen die Kraft der Arretierfeder 42 verschwenkt werden, so daß die Haltenasen 36 die Abstreiferplatte 16 freigeben. Die Lage des Entriegelungsschiebers 50 auf dem Kipphebel 34 gestattet eine einfache Handhabung, da mit einem Finger sowohl die Entsicherung, als auch die Betätigung des Kipphebels vorgenommen werden kann. Ein zufälliges Auslösen des Kipphebels 34, beispielsweise durch einen Stoß, ist hingegen nicht möglich.The stripper plate 16 is removed in such a way that the locking member 44 is first moved with the unlocking slide 50 until the locking shoulder 46 releases the rocker arm 34. Now the rocker arm 34 can be pivoted about the pivot bearing 40 against the force of the locking spring 42, so that the retaining lugs 36 release the wiper plate 16. The position of the unlocking slide 50 on the rocker arm 34 allows easy handling, since both the unlocking and the actuation of the rocker arm can be carried out with one finger. Accidental triggering of the rocker arm 34, for example by an impact, is not possible.

Sobald die Haltenasen 36 die Abstreiferplatte 16 freigeben, sorgen Ausrückfedern 54 über Auswurfbolzen 56 dafür, daß die Haltevorrichtung 18 mit der Abstreiferplatte 16 nach unten von der Führungsbüchse 12 weg ausrückt (siehe Fig. 2). Begrenzt wird die Ausrückbewegung der Haltevorrichtung 18 durch den Anschlagbolzen 30, der sich an das obere Ende der Nut 32 anlegt. Der ringförmige Teil 38 hält die Kipphebel 34 in ihrer geöffneten Stellung, damit diese das spätere Wieder-eindrücken der Haltevorrichtung nicht behindern.As soon as the holding lugs 36 release the wiper plate 16, release springs 54 via ejection bolts 56 ensure that the holding device 18 disengages with the wiper plate 16 downward from the guide bush 12 (see FIG. 2). The disengagement movement of the holding device 18 is limited by the stop bolt 30, which bears against the upper end of the groove 32. The annular part 38 holds the rocker arms 34 in their open position so that they do not hinder the later pushing in of the holding device.

Der Führungswulst 26 in der Haltevorrichtung 18 umfaßt die Abstreiferplatte 16 hufeisenförmig, d. h. nur über ihren halben Umfang, so daß sie in der ausgerückten Stellung der Haltevorrichtung 18 seitlich aus der Öffnung des hufeisenförmigen Führungswulsts 26, axial an dem Ende des einen, im Bereich der Öffnung angeordneten Kipphebels 34 vorbei herauszuziehen ist. Die Haltevorrichtung 18 muß wenigstens soweit aus der Führungsbüchse 12 ausrücken, daß die Abstreiferplatte 16 nicht mehr im Eingriffsbereich des Stanzstempels liegt.The guide bead 26 in the holding device 18 comprises the scraper plate 16 in a horseshoe shape, ie only over its half circumference, so that in the disengaged position of the holding device 18 it moves laterally out of the opening of the horseshoe-shaped guide bead 26, axially at the end of the one, in the area of the opening arranged rocker arm 34 is pulled out. The holding device 18 must at least move out of the guide bush 12 so that the stripper plate 16 is no longer in the engagement area of the punch.

Nach dem Entfernen der Abstreiferplatte 16 kann dann auch dieser ausgebaut werden.After the stripper plate 16 has been removed, it can also be removed.

Der Zusammenbau des Stanzwerkzeugs 10 erfolgt sinngemäß in umgekehrter Richtung. Nach dem Einbau des Stanzstempels in die Führungsbüchse 12 wird die Abstreiferplatte 16 seitlich in den Führungswulst 26 der Haltevorrichtung 18 eingeschoben, bis sie in der Endstellung eine mit bezug auf die Führungsbüchse 12 zentrierte Lage einnimmt. Anschließend wird die Haltevorrichtung gegen die Kraft der Ausrückfedern 54 gegen die Führungsbüchse 12 geschoben. Beim Erreichen der endgültigen Position der Abstreiferplatte 16 schnappen die Kipphebel 34 durch die Kraft der Arretierfedern 42 mit ihren Haltenasen 36 in die Ringnut 24 der Abstreiferplatte 16 ein. Gleichzeitig drücken die Federn 48 die Sicherungsglieder 44 mit ihren Absätzen 46 unter die Kipphebel, so daß die Abstreiferplatte 16 verriegelt und gesichert ist.The punching tool 10 is assembled in the reverse direction. After the punch has been installed in the guide bushing 12, the stripper plate 16 is pushed laterally into the guide bead 26 of the holding device 18 until in the end position it assumes a position centered with respect to the guide bushing 12. The holding device is then pushed against the force of the release springs 54 against the guide bush 12. When the final position of the wiper plate 16 is reached, the rocker arms 34 snap into the annular groove 24 of the wiper plate 16 with their retaining lugs 36 due to the force of the locking springs 42. At the same time, the springs 48 press the locking members 44 with their shoulders 46 under the rocker arms, so that the wiper plate 16 is locked and secured.

Das automatische Einrasten der Verriegelungs- und Sicherungselemente vereinfacht die Handhabung des Werkzeuges erheblich. Prinzipiell wäre es auch denkbar, beispielsweise die Sicherungselente von Hand gesondert einzusetzen, wodurch man jedoch einen Teil des Zeitgewinns, den das Stanzwerkzeug 10 gegenüber bisher üblichen Stanzwerkzeugen bietet, wieder verlieren würde.The automatic locking of the locking and securing elements simplifies the handling of the tool considerably. In principle, it would also be conceivable, for example, to use the safety elements separately by hand, but this would mean that part of the time saved by the punch 10 compared to previously used punch tools would be lost again.

Claims (9)

Stanzwerkzeug mit einer Führungsbüchse (12), die einen in Stanzrichtung nach unten ausbaubaren Stanzstempel aufnimmt und eine Abstreiferplatte (16) trägt, die durch an der Führungsbüchse (12) anzubringende Halteglieder im Eingriffsbereich des Stanzstempels festlegbar und nach dem Lösen der Halteglieder axial vom Stanzstempel abziehbar ist, dadurch gekennzeichnet, daß die Halteglieder (34, 36) an der Führungsbüchse (12) beweglich gelagert und zwischen einer die Abstreiferplatte (16) arretierenden und einer sie freigebenden Stellung bewegbar sind.Punching tool with a guide bush (12), which receives a punch that can be dismantled downwards in the punching direction and carries a stripper plate (16), which can be fixed in the engagement area of the punch by holding elements to be attached to the guide bush (12) and can be axially removed from the punch after releasing the holding members characterized in that the holding members (34, 36) are movably mounted on the guide bushing (12) and can be moved between a position which locks the wiper plate (16) and a position which releases it. Stanzwerkzeuge nach Anspruch 1, dadurch gekennzeichnet, daß die Abstreiferplatte (16) von einer beweglichen Haltevorrichtung (18) aufgenommen ist, die von der Betriebsstellung der Abstreiferplatte (16), in welcher die Halteglieder (34, 36) die Abstreiferplatte (16) und die Haltevorrichtung (18) arretieren, in Stanzrichtung aus dem Eingriffsbereich des Stempels in eine Stellung ausrückbar ist, in welcher die Abstreiferplatte (16) aus einer an der Haltevorrichtung (18) angebrachten Führung (26), welche die Abstreiferplatte (16) zur Führungsbüchse (12) zentriert, seitlich entnehmbar ist.Punching tools according to claim 1, characterized in that the stripper plate (16) is received by a movable holding device (18) which depends on the operating position of the stripper plate (16), in which the holding members (34, 36) the stripper plate (16) and the Lock the holding device (18), in the punching direction it can be disengaged from the engagement area of the punch into a position in which the stripper plate (16) consists of a guide (26) attached to the holding device (18), which guides the stripper plate (16) to the guide bush (12 ) centered, can be removed from the side. Stanzwerkzeug nach Anspruch 2, dadurch gekennzeichnet, daß ein elastisches Element (54) die Ausrückbewegung der Haltevorrichtung (18) unterstützt.Punching tool according to claim 2, characterized in that an elastic element (54) supports the disengaging movement of the holding device (18). Stanzwerkzeug nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Halteglieder Kipphebel (34) mit Haltenasen (36) sind, durch deren einseitiges Niederdrücken gegen die Kraft eines elastischen Elements (42) die Abstreiferplatte (16) entriegelbar ist.Punching tool according to one of the preceding claims, characterized in that the holding members are rocker arms (34) with holding lugs (36), due to their one-sided Depressing against the force of an elastic element (42) the stripper plate (16) can be unlocked. Stanzwerkzeug nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Halteglieder (34) Sicherungen (44, 46) gegen unbeabsichtigtes Öffnen aufweisen.Punching tool according to one of the preceding claims, characterized in that the holding members (34) have safeguards (44, 46) against unintentional opening. Stanzwerkzeug nach Anspruch 5, dadurch gekennzeichnet, daß ein an der Führungsbüchse (12) verschieblich angeordneter Absatz (46) unter die niederdrückbare Seite des Kipphebels (34) schiebbar ist.Punching tool according to claim 5, characterized in that a shoulder (46) which is displaceably arranged on the guide bush (12) can be pushed under the depressible side of the rocker arm (34). Stanzwerkzeug nach Anspruch 6, dadurch gekennzeichnet, daß ein elastisches Element (48) den Absatz (46) in seiner den Kipphebel (34) verriegelnden Stellung hält.Punching tool according to claim 6, characterized in that an elastic element (48) holds the shoulder (46) in its position locking the rocker arm (34). Stanzwerkzeug nach Anspruch 6 oder 7, dadurch gekennzeichnet, daß auf dem Kipphebel (34) ein Entriegelungsglied (50) verschieblich gelagert ist, das beim Verschieben des Sicherungsglieds (44) den Absatz (46) in eine den Kipphebel (34) freigebende Stellung mitnimmt.Punching tool according to claim 6 or 7, characterized in that an unlocking member (50) is displaceably mounted on the rocker arm (34), which takes the shoulder (46) into a position releasing the rocker arm (34) when the securing member (44) is moved. Stanzwerkzeug nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Halteglieder (34) radial von außen in eine kreisförmige Nut (24) in der Umfangsfläche der Abstreiferplatte (16) eingreifen.Punching tool according to one of the preceding claims, characterized in that the holding members (34) engage radially from the outside in a circular groove (24) in the peripheral surface of the stripper plate (16).
EP96115920A 1995-10-26 1996-10-04 Punching tool with holding means for stripper plate Expired - Lifetime EP0770437B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19539777 1995-10-26
DE19539777A DE19539777A1 (en) 1995-10-26 1995-10-26 Punching tool with holder for stripper plate

Publications (2)

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EP0770437A1 true EP0770437A1 (en) 1997-05-02
EP0770437B1 EP0770437B1 (en) 2001-06-20

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EP (1) EP0770437B1 (en)
AT (1) ATE202303T1 (en)
DE (2) DE19539777A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003103872A1 (en) * 2002-06-07 2003-12-18 Wilson Tool International, Inc. Improved stripper plate retention system
JP2006167746A (en) * 2004-12-15 2006-06-29 Amada Co Ltd Punch die assembly

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4248111A (en) * 1979-07-16 1981-02-03 Wilson Tool Company Punch guide assembly
FR2475950A1 (en) * 1980-02-15 1981-08-21 Behrens Ag C DEVICE FOR MAINTAINING AN INTERCHANGEABLE DEVETER ON THE TOOL HOLDER OF A FORMING TOOL FREE OF CHIP REMOVAL, AND TOOL FOR CHANGING THE DEVETER
EP0628364A1 (en) * 1993-06-07 1994-12-14 Amada Metrecs Company, Limited Punching tool
EP0640417A1 (en) * 1993-07-30 1995-03-01 Amada Metrecs Company, Limited Upper tool for a press
EP0644005A2 (en) * 1993-02-03 1995-03-22 Amada Metrecs Company, Limited Punching die

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4248111A (en) * 1979-07-16 1981-02-03 Wilson Tool Company Punch guide assembly
FR2475950A1 (en) * 1980-02-15 1981-08-21 Behrens Ag C DEVICE FOR MAINTAINING AN INTERCHANGEABLE DEVETER ON THE TOOL HOLDER OF A FORMING TOOL FREE OF CHIP REMOVAL, AND TOOL FOR CHANGING THE DEVETER
EP0644005A2 (en) * 1993-02-03 1995-03-22 Amada Metrecs Company, Limited Punching die
EP0628364A1 (en) * 1993-06-07 1994-12-14 Amada Metrecs Company, Limited Punching tool
EP0640417A1 (en) * 1993-07-30 1995-03-01 Amada Metrecs Company, Limited Upper tool for a press

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003103872A1 (en) * 2002-06-07 2003-12-18 Wilson Tool International, Inc. Improved stripper plate retention system
US6895849B2 (en) 2002-06-07 2005-05-24 Wilson Tool International, Inc. Stripper plate retention system
CN100346897C (en) * 2002-06-07 2007-11-07 威尔逊国际工具公司 Stripper plate retention system
AU2003238942B2 (en) * 2002-06-07 2009-04-30 Wilson Tool International, Inc. Improved stripper plate retention system
JP2006167746A (en) * 2004-12-15 2006-06-29 Amada Co Ltd Punch die assembly
JP4713879B2 (en) * 2004-12-15 2011-06-29 株式会社アマダ Punch mold assembly

Also Published As

Publication number Publication date
DE59607125D1 (en) 2001-07-26
ATE202303T1 (en) 2001-07-15
DE19539777A1 (en) 1997-04-30
EP0770437B1 (en) 2001-06-20

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