EP3397408B1 - Forming tool - Google Patents

Forming tool Download PDF

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Publication number
EP3397408B1
EP3397408B1 EP16828948.6A EP16828948A EP3397408B1 EP 3397408 B1 EP3397408 B1 EP 3397408B1 EP 16828948 A EP16828948 A EP 16828948A EP 3397408 B1 EP3397408 B1 EP 3397408B1
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EP
European Patent Office
Prior art keywords
forming tool
spacer element
tool
sheet metal
down 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.)
Active
Application number
EP16828948.6A
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German (de)
French (fr)
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EP3397408A1 (en
Inventor
Ralf Schleich
Claus EISINGER
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Voestalpine Automotive Components Dettingen GmbH and Co KG
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Voestalpine Automotive Components Dettingen GmbH and Co KG
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Application filed by Voestalpine Automotive Components Dettingen GmbH and Co KG filed Critical Voestalpine Automotive Components Dettingen GmbH and Co KG
Priority to SI201630719T priority Critical patent/SI3397408T1/en
Publication of EP3397408A1 publication Critical patent/EP3397408A1/en
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Classifications

    • 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
    • B21D24/00—Special deep-drawing arrangements in, or in connection with, presses
    • B21D24/04—Blank holders; Mounting means therefor
    • 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
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/20—Deep-drawing
    • B21D22/22—Deep-drawing with devices for holding the edge of the blanks

Definitions

  • the invention relates to a forming tool with a first tool part, which has a tool upper part and a die with a movably inserted hold-down device, which is supported against the tool upper part via a first pressure medium, with a second tool part, a tool lower part, one which interacts with the die for forming Stamp and a movable sheet metal holder, which is supported against the lower tool part by a second pressure medium, and with a locking device provided between the sheet metal holder and hold-down device, which has at least one spacer element, which spacer element in dependence on a relative movement resulting from the closing position of the forming tool from a rest position a working position is movably mounted, which defines the distance between the sheet metal holder and hold-down device when the forming tool is opened.
  • this solution of the locking device requires, among other things, that a comparatively massive design is required due to the lever forces on the rocker arm, which is why such locking devices are unsuitable for tools with comparatively high loads.
  • such locking devices of the prior art are comparatively complex in their control and structural design - and are therefore costly to manufacture and maintain.
  • the invention therefore has the task of simplifying it with regard to the construction effort and ensuring high stability.
  • this version should also be suitable for high loads.
  • the locking device has at least one wedge drive with slide and driver, the slide having the spacer element depending on the relative movement between the sheet metal holder and the upper part of the tool when the forming tool is closed, in contact with the driver is slidably mounted to move the spacer into its working position.
  • the locking device has at least one wedge drive with slide and driver
  • that function of force deflection known from wedge drives can be used to operate the locking device simply when the slide having the spacer element as a function of the relative movement between the sheet metal holder and the upper part of the tool when the forming tool closes, is slidably mounted in contact with the driver to move the spacer to its working position.
  • a wedge drive in Compared to an axle-mounted rocker arm from the prior art, it is designed to be comparatively robust, as a result of which even high loads can be safely removed. In this way it can also be made possible, for example, to use gas pressure springs as pressure medium.
  • the wedge drive can fix the distance between the sheet metal holder and hold-down device on the locking device according to the invention. According to the invention, a forming tool is thus provided which can be used even under high loads and which always allows a high forming quality.
  • the forming tool can be a deep-drawing tool for tensile pressure forming according to DIN 8584. Furthermore, it is generally mentioned that a sheet metal, a sheet metal blank (sheet metal blank) or a tailor-made sheet metal blank (tailored blank) can be formed with this forming tool.
  • the spacer element forms a stop for the hold-down device and / or sheet holder in its working position.
  • this comparatively mechanically robust solution can further improve the stability of the forming tool.
  • the hold-down device has a shoulder which projects radially from the die and which forms a counter stop for the stop of the spacer element, the construction of the forming tool can be further simplified.
  • the locking device can thus be provided outside of the tool parts interacting for the shaping - with which a relief in the structure can be achieved and possible disruptive contours on the shaping tool can be avoided.
  • the loads on the movable tool parts or on the upper part of the tool can be reduced if the driver is attached to the upper part of the tool and the slide is mounted on the sheet metal holder so that it can move.
  • the slide If the slide is slidably mounted in contact with the driver against the action of a first spring, the slide can be returned to its free rest position after the shaping tool has been opened, in a structurally simple manner.
  • the spacer element If the spacer element is slidably mounted on the slide against the action of a second spring, the direction of action of which is opposite to the direction of action of the first spring, the spacer element can be moved into its working position under pretension - which can increase the reliable operation of the locking device. In addition, the spacer element can thus be shifted in time from the movement of the slide into its working position, which can make it easier to match the wedge guide to the relative movement between the sheet metal holder and the upper part of the tool.
  • the construction of the forming tool can be further simplified in this way.
  • the locking device advantageously does not affect the handling of the forming tool - both when loading a sheet and when removing the formed sheet / plate - if the slide is displaceably mounted in such a way that in the working position of the spacer element it is closest to the die occupies the position.
  • the slide and spacer element are namely further away from the insertion or removal area between the two tool parts, as a result of which the locking device cannot form any interference contours on the forming tool.
  • the locking device can be protected in a structurally simple manner from damage caused by loading / removing the sheet metal - which can contribute to a further increase in the stability of the forming tool.
  • first and second pressure medium are designed as gas pressure springs.
  • a forming tool 1 shown as a single-acting press is used for deep drawing a sheet, a sheet metal blank (sheet metal blank) and / or a tailored sheet metal blank (tailored blank).
  • Fig. 1 is this forming tool 1 in its open position, in which open position the flat plate 2 to be formed is already inserted. In this open position of the forming tool 1, the two tool parts 3, 4 of the forming tool 1 can be seen.
  • the first, upper tool part 3 includes an upper tool part 5, a die 6 and a hold-down 7.
  • the hold-down 7 is supported against the upper tool part 5 by a first pressure medium 8, which in the exemplary embodiment is designed as a first gas pressure spring 108 - see the latter Fig. 3 ,
  • the die 6 is rigidly connected to the upper tool part 5.
  • the second lower tool part 4 includes a lower tool part 9, a punch 10 and a sheet metal holder 11.
  • the sheet metal holder 11 is supported against the lower tool part 9 by a second pressure medium 12, which is designed as a second gas pressure spring 112 is - see the latter Fig. 3 ,
  • the forming tool 1 according to the invention therefore does not require any under air.
  • the punch 10 of the lower tool part 4 is fastened to the lower tool part 9 and interacts with the die 6 of the upper tool part 3 for reshaping the blank 2.
  • the forming tool 1 also has a locking device 13, which is provided between the sheet metal holder 11 and hold-down 7.
  • the locking device 13 comprises a spacer element 14, with which the distance between the sheet metal holder 11 and hold-down device 7 can be determined. This is necessary for opening the forming tool 1 in order to achieve a high quality, for example, despite possibly different pressure forces of the first and second pressure means 8, 12. B. on the formed circuit board 2 to ensure.
  • This locking device 13 is actuated by the closing movement of the forming tool 1, as shown in FIG Fig. 2 can be seen.
  • the spacer element 14 is movably supported as a function of a relative movement that occurs when the forming tool 1 closes - namely from a free rest position 15 when the forming tool 1 is open Fig. 1 in a working position 16 after Fig. 3 , which defines the distance between sheet metal holder 11 and hold-down 7 when the forming tool 1 is opened.
  • this movement of the spacer element 14 is implemented by a wedge drive 17, which belongs to the locking device 13.
  • the wedge drive 17 has a slide 18 and a driver 19, which form corresponding guide surfaces 20 on the wedge drive 17.
  • the slider 18 has the spacer element 14 and is slidably mounted - namely in the exemplary embodiment on the sheet metal holder 11. Depending on the relative movement between the sheet metal holder 11 and the upper tool part 5, the slider 18 is now in contact with the driver 19, which in the exemplary embodiment is on the upper tool part 5 is attached - moved and thus moves the spacer 14 under the hold-down 7, whereby the hold-down 7 strikes the spacer 14 and thus the sheet metal holder 11.
  • the spacer element forms 14 a stop 24 for the hold-down 7. This defines the distance between sheet metal holder 11 and hold-down device 7 - in the exemplary embodiment, via the height of spacer element 14 and its height offset from sheet metal holder 11, which height offset results from the position of spacer element 14 on slide 18.
  • the forming tool 1 according to the invention thus has a particularly high stability.
  • Fig. 1 can further be seen, the slide 18 is slidably mounted against an action of a first spring 21, which is designed as a third gas pressure spring.
  • This spring 21 acts between the slide 18 and the sheet metal holder 11 and presses the slide 18 along its first linear guide 22 on the sheet metal holder 11 away from the die 6.
  • the slider 18 in the working position 16 of the spacer element 14 comes closest to the die 6, which position 23 of the slider in the Fig. 3 can be seen.
  • the slide 18 In the rest position 15 of the spacer element 14, the slide 18 is arranged furthest away from the die 6. In this way, disruptive contours that arise in this way when loading the forming tool 1 are prevented.
  • the holding-down device 7 forms a shoulder 25 which projects radially from the die 6 and which forms a counter-stop 26 for the stop 24 of the spacer element 14.
  • This counter-stop 26 is provided on the axially projecting section 27 of the radially projecting shoulder 25, as a result of which the spacer element 14 can be reduced in height accordingly.
  • the spacer element 14 is advantageously mounted on the slide 18 so as to be displaceable against the action of a second spring 28.
  • This designed as the fourth gas pressure spring Spring 21 acts between spacer element 14 and slide 18 and loads spacer element 14 along its second linear guide 31 on slide 18 with a direction of action 29 which is opposite to direction of action 30 of first spring 21.
  • the spacer element 14 can be brought into its working position 16 under pre-tension, which pre-tension in Fig. 2 on the basis of the displacement of the spacer element 14 against the action of the second spring 28.
  • the slide 18 can also be movably mounted on the upper tool part 5 and the driver can be fastened to the sheet metal holder 11.
  • the spacer element then also forms a stop 24 for the sheet metal holder 11 in order to determine the distance between the sheet metal holder 11 and hold-down device 7. It is also conceivable that the spacer element 14 each forms a stop 24 for sheet metal holder 11 and hold-down 7 - this is also not shown.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Mounting, Exchange, And Manufacturing Of Dies (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)

Description

Technisches GebietTechnical field

Die Erfindung betrifft ein Umformwerkzeug mit einem ersten Werkzeugteil, das ein Werkzeugoberteil und eine Matrize mit einem beweglich eingesetzten Niederhalter aufweist, der sich gegen das Werkzeugoberteil über ein erstes Druckmittel abstützt, mit einem zweiten Werkzeugteil, das ein Werkzeugunterteil, einen mit der Matrize zum Umformen zusammenwirkenden Stempel und einen beweglichen Blechhalter aufweist, der sich gegen das Werkzeugunterteil über ein zweites Druckmittel abstützt, und mit einer zwischen Blechhalter und Niederhalter vorgesehenen Verriegelungseinrichtung, die mindestens ein Distanzelement aufweist, welches Distanzelement in Abhängigkeit einer sich beim Schließen des Umformwerkzeugs ergebenden Relativbewegung von einer Ruheposition in eine Arbeitsposition beweglich gelagert ist, die beim Öffnen des Umformwerkzeugs den Abstand zwischen Blechhalter und Niederhalter festlegt.The invention relates to a forming tool with a first tool part, which has a tool upper part and a die with a movably inserted hold-down device, which is supported against the tool upper part via a first pressure medium, with a second tool part, a tool lower part, one which interacts with the die for forming Stamp and a movable sheet metal holder, which is supported against the lower tool part by a second pressure medium, and with a locking device provided between the sheet metal holder and hold-down device, which has at least one spacer element, which spacer element in dependence on a relative movement resulting from the closing position of the forming tool from a rest position a working position is movably mounted, which defines the distance between the sheet metal holder and hold-down device when the forming tool is opened.

Stand der TechnikState of the art

Um beim Öffnen eines Umformwerkzeugs Niederhalter und Blechhalter zueinander zu verriegeln bzw. deren Abstand zueinander festzulegen, ist es aus dem Stand der Technik bekannt, eine Verriegelungseinrichtung vorzusehen, die beim Schließen des Umformwerkzeugs ein als Kipphebel ausgeführtes Distanzelement zwischen Niederhalter und Blechhalter einschwenkt (z.B.: Umformwerkzeug der Firma Allgaier Werk GmbH, DE). Durch diese Maßnahme des Verriegelns ist es möglich, einen Unterschied in der Druckkraft der beiden Druckmittel, beispielsweise Gasdruckfedern, in gewisser Weise zu kompensieren - um zu versuchen, unerwünschte Relativbewegung zwischen Niederhalter und Blechhalter beim Öffnen des Umformwerkzeugs zu unterbinden. Diesbezüglich kann eine Beeinträchtigung der Umformqualität daher reduziert werden. Nachteilig bedarf diese Lösung der Verriegelungseinrichtung unter anderem, dass aufgrund der Hebelkräfte am Kipphebel eine vergleichsweise massive Ausführung erforderlich ist, weshalb derartige Verriegelungseinrichtungen für Werkzeuge mit vergleichsweise hohen Lasten ungeeignet sind. Zudem sind solche Verriegelungseinrichtungen des Stands der Technik in ihrer Steuerung und konstruktiven Ausführung vergleichsweise aufwendig - und somit kostenintensiv in Herstellung und Wartung.In order to lock hold-down device and sheet metal holder to one another or to fix their distance from one another when a forming tool is opened, it is known from the prior art to provide a locking device which, when the forming tool is closed, swivels in a spacer element designed as a rocker arm between holding-down device and sheet metal holder (for example: forming tool from Allgaier Werk GmbH, DE). This locking measure makes it possible to compensate for a difference in the pressure force of the two pressure means, for example gas pressure springs, to a certain extent - in order to try to prevent undesired relative movement between the hold-down device and the sheet metal holder Prevent opening of the forming tool. In this regard, impairment of the forming quality can therefore be reduced. Disadvantageously, this solution of the locking device requires, among other things, that a comparatively massive design is required due to the lever forces on the rocker arm, which is why such locking devices are unsuitable for tools with comparatively high loads. In addition, such locking devices of the prior art are comparatively complex in their control and structural design - and are therefore costly to manufacture and maintain.

Die Erfindung hat sich daher ausgehend vom Umformwerkzeug des geschilderten Stands der Technik die Aufgabe gestellt, dieses hinsichtlich des Konstruktionsaufwands zu vereinfachen und hohe Standfestigkeit zu gewährleisten. Zudem soll diese Ausführung auch für hohe Lasten geeignet sein.Starting from the forming tool of the prior art described, the invention therefore has the task of simplifying it with regard to the construction effort and ensuring high stability. In addition, this version should also be suitable for high loads.

Darstellung der ErfindungPresentation of the invention

Die Erfindung löst die gestellte Aufgabe bei dem gattungsgemäßen Umformwerkzeug dadurch, dass die Verriegelungseinrichtung mindestens einen Keiltrieb mit Schieber und Treiber aufweist, wobei der das Distanzelement aufweisende Schieber in Abhängigkeit der sich zwischen Blechhalter und Werkzeugoberteil beim Schließen des Umformwerkzeugs ergebenden Relativbewegung, unter Kontakt mit dem Treiber verschiebbar gelagert ist, das Distanzelement in seine Arbeitsposition zu bewegen.The invention solves the stated problem in the generic forming tool in that the locking device has at least one wedge drive with slide and driver, the slide having the spacer element depending on the relative movement between the sheet metal holder and the upper part of the tool when the forming tool is closed, in contact with the driver is slidably mounted to move the spacer into its working position.

Weist die Verriegelungseinrichtung mindestens einen Keiltrieb mit Schieber und Treiber auf, kann jene von Keiltrieben bekannte Funktion der Kraftumlenkung genutzt werden, die Verriegelungseinrichtung einfach zu betätigen, wenn der das Distanzelement aufweisende Schieber in Abhängigkeit der sich zwischen Blechhalter und Werkzeugoberteil beim Schließen des Umformwerkzeugs ergebenden Relativbewegung, unter Kontakt mit dem Treiber verschiebbar gelagert ist, das Distanzelement in seine Arbeitsposition zu bewegen. Außerdem kann ein Keilantrieb im Vergleich zu einem achsgelagerten Kipphebel aus dem Stand der Technik vergleichsweise robust ausgeführt sein, wodurch selbst hohe Lasten sicher abgetragen werden können. Auf diese Weise kann es beispielsweise auch ermöglicht werden, Gasdruckfedern als Druckmittel zu verwenden. Der Keiltrieb kann an der erfindungsgemäßen Verriegelungseinrichtung standfest den Abstand zwischen Blechhalter und Niederhalter festlegen. Erfindungsgemäß ist es also ein Umformwerkzeug zur Verfügung gestellt, das selbst bei hohen Lasten einsetzbar ist und stets eine hohe Umformqualität zulässt.If the locking device has at least one wedge drive with slide and driver, that function of force deflection known from wedge drives can be used to operate the locking device simply when the slide having the spacer element as a function of the relative movement between the sheet metal holder and the upper part of the tool when the forming tool closes, is slidably mounted in contact with the driver to move the spacer to its working position. In addition, a wedge drive in Compared to an axle-mounted rocker arm from the prior art, it is designed to be comparatively robust, as a result of which even high loads can be safely removed. In this way it can also be made possible, for example, to use gas pressure springs as pressure medium. The wedge drive can fix the distance between the sheet metal holder and hold-down device on the locking device according to the invention. According to the invention, a forming tool is thus provided which can be used even under high loads and which always allows a high forming quality.

Im Allgemeinen wird erwähnt, dass es sich bei dem Umformwerkzeug um ein Tiefziehwerkzeug zum Zugdruckumformen nach DIN 8584 handeln kann. Weiter wird im Allgemeinen erwähnt, dass mit diesem Umformwerkzeug ein Blech, einer Blechplatine (Blechzuschnitt) oder einer maßgeschneiderte Blechplatine (Tailored Blank) umgeformt werden können.In general, it is mentioned that the forming tool can be a deep-drawing tool for tensile pressure forming according to DIN 8584. Furthermore, it is generally mentioned that a sheet metal, a sheet metal blank (sheet metal blank) or a tailor-made sheet metal blank (tailored blank) can be formed with this forming tool.

Um den Abstand zwischen Blechhalter und Niederhalter sicher festzustellen kann vorgesehen sein, dass das Distanzelement in seiner Arbeitsposition einen Anschlag für den Niederhalter und/oder Blechhalter ausbildet. Außerdem kann diese vergleichsweise mechanisch robuste Lösung die Standfestigkeit des Umformwerkzeugs weiter verbessern.In order to reliably determine the distance between sheet metal holder and hold-down device, it can be provided that the spacer element forms a stop for the hold-down device and / or sheet holder in its working position. In addition, this comparatively mechanically robust solution can further improve the stability of the forming tool.

Weist der Niederhalter eine der Matrize radial vorstehende Schulter auf, die einen Gegenanschlag für den Anschlag des Distanzelements ausbildet, kann die Konstruktion des Umformwerkzeugs weiter vereinfacht werden. Zudem kann damit die Verriegelungseinrichtung außerhalb der zum Umformen zusammenwirkenden Werkzeugteile vorgesehen werden - womit ein Erleichterung im Aufbau erreichbar und eventuelle Störkonturen am Umformwerkzeug vermeidbar sind.If the hold-down device has a shoulder which projects radially from the die and which forms a counter stop for the stop of the spacer element, the construction of the forming tool can be further simplified. In addition, the locking device can thus be provided outside of the tool parts interacting for the shaping - with which a relief in the structure can be achieved and possible disruptive contours on the shaping tool can be avoided.

Die Lasten an den beweglichen Werkzeugteilen bzw. am Werkzeugoberteil können verringert werden, wenn der Treiber am Werkzeugoberteil befestigt ist und der Schieber am Blechhalter verschiebbar gelagert ist.The loads on the movable tool parts or on the upper part of the tool can be reduced if the driver is attached to the upper part of the tool and the slide is mounted on the sheet metal holder so that it can move.

Ist der Schieber unter Kontakt mit dem Treiber entgegen der Wirkung einer ersten Feder verschiebbar gelagert, kann der Schieber nach dem Öffnen des Umformwerkzeugs - konstruktiv einfach gelöst - wieder in seine freie Ruheposition zurückgeführt werden.If the slide is slidably mounted in contact with the driver against the action of a first spring, the slide can be returned to its free rest position after the shaping tool has been opened, in a structurally simple manner.

Ist das Distanzelement am Schieber entgegen der Wirkung einer zweiten Feder verschiebbar gelagert, deren Wirkungsrichtung der Wirkungsrichtung der ersten Feder entgegensetzt ist, kann das Distanzelement unter Vorspannung in seine Arbeitsposition bewegt werden - was den zuverlässigen Betrieb der Verriegelungsreinrichtung erhöhen kann. Zudem kann damit das Distanzelement zeitlich versetzt von der Bewegung des Schiebers in seine Arbeitsposition verlagert werden, womit sich die Abstimmung der Keilführung auf die Relativbewegung zwischen Blechhalter und Werkzeugoberteil erleichtern kann. Die Konstruktion des Umformwerkzeugs ist auf diese Weise weiter vereinfachbar.If the spacer element is slidably mounted on the slide against the action of a second spring, the direction of action of which is opposite to the direction of action of the first spring, the spacer element can be moved into its working position under pretension - which can increase the reliable operation of the locking device. In addition, the spacer element can thus be shifted in time from the movement of the slide into its working position, which can make it easier to match the wedge guide to the relative movement between the sheet metal holder and the upper part of the tool. The construction of the forming tool can be further simplified in this way.

Die Handhabung des Umformwerkzeugs - sowohl beim Beschicken mit einem Blech als auch beim Entnehmen des umgeformten Blechs/ der umgeformten Platine - bleibt von der Verriegelungseinrichtung vorteilhaft unbeeinträchtigt, wenn der Schieber derart verschiebbar gelagert ist, dass er in der Arbeitsposition des Distanzelements seine zur Matrize am nächsten gelegene Position einnimmt. Schieber samt Distanzelement sind nämlich bei offenem Umformwerkzeug vom Einlege- bzw. Entnahmebereich zwischen den beiden Werkzeugteilen weiter entfernt, wodurch die Verriegelungseinrichtung auch keine Störkonturen am Umformwerkzeug ausbilden kann. Zudem kann damit die Verriegelungseinrichtung auf konstruktiv einfache Weise vor Beschädigungen durch das Beschicken/Entnehmen des Blechs geschützt werden - was zur weiteren Erhöhung der Standfestigkeit des Umformwerkzeugs beitragen kann.The locking device advantageously does not affect the handling of the forming tool - both when loading a sheet and when removing the formed sheet / plate - if the slide is displaceably mounted in such a way that in the working position of the spacer element it is closest to the die occupies the position. When the forming tool is open, the slide and spacer element are namely further away from the insertion or removal area between the two tool parts, as a result of which the locking device cannot form any interference contours on the forming tool. In addition, the locking device can be protected in a structurally simple manner from damage caused by loading / removing the sheet metal - which can contribute to a further increase in the stability of the forming tool.

Konstruktive Einfachheit am Umformwerkzeug kann erreicht werden, wenn erstes und zweites Druckmittel als Gasdruckfedern ausgeführt sind.Structural simplicity on the forming tool can be achieved if the first and second pressure medium are designed as gas pressure springs.

Kurze Beschreibung der ZeichnungenBrief description of the drawings

In den Figuren ist beispielsweise der Erfindungsgegenstand anhand einer Ausführungsvariante näher dargestellt. Es zeigen

Fig. 1
eine aufgerissene Seitenansicht auf ein offenes Umformwerkzeug mit einer eingelegten Blechplatine,
Fig. 2
das Umformwerkzeug in einer teilweise geschlossener Stellung,
Fig. 3
das Umformwerkzeug in einer geschlossener Stellung und
Fig. 4
das Umformwerkzeug bei seiner Rückführung in die offene Stellung,
In the figures, for example, the subject of the invention is shown in more detail using an embodiment variant. Show it
Fig. 1
a torn side view of an open forming tool with an inserted sheet metal plate,
Fig. 2
the forming tool in a partially closed position,
Fig. 3
the forming tool in a closed position and
Fig. 4
the forming tool when it is returned to the open position,

Wege zur Ausführung der ErfindungWays of Carrying Out the Invention

Das in den Figuren 1 bis 4 beispielsweise als einfach wirkende Presse dargestellte Umformwerkzeug 1 dient zum Tiefziehen eines Blechs, einer Blechplatine (Blechzuschnitt) und/oder einer maßgeschneiderten Blechplatine (Tailored Blank). In Fig. 1 befindet sich dieses Umformwerkzeug 1 in seiner offenen Stellung, in welcher offenen Stellung die umzuformende flache Platine 2 bereits eingelegt ist. In dieser offenen Stellung des Umformwerkzeugs 1 sind die beiden Werkzeugteile 3, 4 des Umformwerkzeugs 1 erkennbar.That in the Figures 1 to 4 for example, a forming tool 1 shown as a single-acting press is used for deep drawing a sheet, a sheet metal blank (sheet metal blank) and / or a tailored sheet metal blank (tailored blank). In Fig. 1 is this forming tool 1 in its open position, in which open position the flat plate 2 to be formed is already inserted. In this open position of the forming tool 1, the two tool parts 3, 4 of the forming tool 1 can be seen.

Dem ersten, oberen Werkzeugteil 3 gehören ein Werkzeugoberteil 5, eine Matrize 6 und ein Niederhalter 7 zu. Der Niederhalter 7 stützt sich gegen das Werkzeugoberteil 5 über ein erstes Druckmittel 8 ab, das im Ausführungsbeispiel als erste Gasdruckfeder 108 ausgeführt ist - siehe zu Letzterer Fig. 3. Die Matrize 6 ist mit dem Werkzeugoberteil 5 starr verbunden.The first, upper tool part 3 includes an upper tool part 5, a die 6 and a hold-down 7. The hold-down 7 is supported against the upper tool part 5 by a first pressure medium 8, which in the exemplary embodiment is designed as a first gas pressure spring 108 - see the latter Fig. 3 , The die 6 is rigidly connected to the upper tool part 5.

Zum zweiten unteren Werkzeugteil 4 gehören ein Werkzeugunterteil 9, ein Stempel 10 und einen Blechhalter 11. Der Blechhalter 11 stützt sich gegen das Werkzeugunterteil 9 über ein zweites Druckmittel 12 ab, das als zweite Gasdruckfeder 112 ausgeführt ist - siehe zu Letzterer Fig. 3. Das erfindungsgemäße Umformwerkzeug 1 benötigt daher keine Unterluft. Der Stempel 10 des unteren Werkzeugteils 4 ist am Werkzeugunterteil 9 befestigt und wirkt mit der Matrize 6 des oberen Werkzeugteils 3 zum Umformen der Platine 2 zusammen.The second lower tool part 4 includes a lower tool part 9, a punch 10 and a sheet metal holder 11. The sheet metal holder 11 is supported against the lower tool part 9 by a second pressure medium 12, which is designed as a second gas pressure spring 112 is - see the latter Fig. 3 , The forming tool 1 according to the invention therefore does not require any under air. The punch 10 of the lower tool part 4 is fastened to the lower tool part 9 and interacts with the die 6 of the upper tool part 3 for reshaping the blank 2.

Das Umformwerkzeug 1 weist zudem eine Verriegelungseinrichtung 13 auf, die zwischen Blechhalter 11 und Niederhalter 7 vorgesehen ist. Der Verriegelungseinrichtung 13 umfasst ein Distanzelement 14 auf, mit welchem der Abstand zwischen Blechhalter 11 und Niederhalter 7 festgelegt werden kann. Dies ist für das Öffnen des Umformwerkzeugs 1 erforderlich, um trotz eventuell unterschiedlicher Drucckräfte von erstem und zweitem Druckmittel 8, 12 eine hohe Qualität, z. B. an der umgeformten Platine 2, zu gewährleisten. Diese Verriegelungseinrichtung 13 wird durch die Schließbewegung des Umformwerkzeugs 1 betätigt, wie dies in Fig. 2 zu erkennen ist. In Zusammenschau der Figuren 1 bis 4 ist zu erkennen, dass das Distanzelement 14 in Abhängigkeit einer sich beim Schließen des Umformwerkzeugs 1 ergebenden Relativbewegung beweglich gelagert ist - und zwar von einer freien Ruheposition 15 bei geöffnetem Umformwerkzeug 1 nach Fig. 1 in eine Arbeitsposition 16 nach Fig. 3, welche beim Öffnen des Umformwerkzeugs 1 den Abstand zwischen Blechhalter 11 und Niederhalter 7 festlegt.The forming tool 1 also has a locking device 13, which is provided between the sheet metal holder 11 and hold-down 7. The locking device 13 comprises a spacer element 14, with which the distance between the sheet metal holder 11 and hold-down device 7 can be determined. This is necessary for opening the forming tool 1 in order to achieve a high quality, for example, despite possibly different pressure forces of the first and second pressure means 8, 12. B. on the formed circuit board 2 to ensure. This locking device 13 is actuated by the closing movement of the forming tool 1, as shown in FIG Fig. 2 can be seen. In summary the Figures 1 to 4 It can be seen that the spacer element 14 is movably supported as a function of a relative movement that occurs when the forming tool 1 closes - namely from a free rest position 15 when the forming tool 1 is open Fig. 1 in a working position 16 after Fig. 3 , which defines the distance between sheet metal holder 11 and hold-down 7 when the forming tool 1 is opened.

Erfindungsgemäß wird diese Bewegung des Distanzelements 14 von einem Keiltrieb 17 umgesetzt, welcher der Verriegelungseinrichtung 13 zugehört. Der Keiltrieb 17 weist hierzu einen Schieber 18 und einen Treiber 19 auf, die korrespondierende Führungsflächen 20 am Keiltrieb 17 ausbilden.According to the invention, this movement of the spacer element 14 is implemented by a wedge drive 17, which belongs to the locking device 13. For this purpose, the wedge drive 17 has a slide 18 and a driver 19, which form corresponding guide surfaces 20 on the wedge drive 17.

Der Schieber 18 weist das Distanzelement 14 auf und ist verschiebbar gelagert - nämlich im Ausführungsbeispiel am Blechhalter 11. In Abhängigkeit der sich zwischen Blechhalter 11 und Werkzeugoberteil 5 ergebenden Relativbewegung wird nun der Schieber 18 - unter Kontakt mit dem Treiber 19, welcher im Ausführungsbeispiel am Werkzeugoberteil 5 befestigt ist - verschoben und bewegt damit das Distanzelement 14 unter den Niederhalter 7, wodurch der Niederhalter 7 an das Distanzelement 14 und damit an den Blechhalter 11 anschlägt. Hierzu bildet das Distanzelement 14 einen Anschlag 24 für den Niederhalter 7 aus. Damit ist der Abstand zwischen Blechhalter 11 und Niederhalter 7 festgelegt - und zwar im Ausführungsbeispiel über die Höhe des Distanzelements 14 und dessen Höhenversatz zum Blechhalter 11, welcher Höhenversatz sich durch die Lage des Distanzelements 14 am Schieber 18 ergibt.The slider 18 has the spacer element 14 and is slidably mounted - namely in the exemplary embodiment on the sheet metal holder 11. Depending on the relative movement between the sheet metal holder 11 and the upper tool part 5, the slider 18 is now in contact with the driver 19, which in the exemplary embodiment is on the upper tool part 5 is attached - moved and thus moves the spacer 14 under the hold-down 7, whereby the hold-down 7 strikes the spacer 14 and thus the sheet metal holder 11. For this purpose, the spacer element forms 14 a stop 24 for the hold-down 7. This defines the distance between sheet metal holder 11 and hold-down device 7 - in the exemplary embodiment, via the height of spacer element 14 and its height offset from sheet metal holder 11, which height offset results from the position of spacer element 14 on slide 18.

Auf diese Weise ist eine besonders robuste Verriegelungseinrichtung 13 geschaffen, die selbst bei hohen Lasten den festgelegten Abstand zwischen Blechhalter 11 und Niederhalter 7 sicher einstellen kann. Das erfindungsgemäße Umformwerkzeug 1 weist also eine besonders hohe Standfestigkeit auf.In this way, a particularly robust locking device 13 is created, which can set the specified distance between sheet metal holder 11 and hold-down device 7 securely even with high loads. The forming tool 1 according to the invention thus has a particularly high stability.

Wie der Fig. 1 weiter zu entnehmen, ist der Schieber 18 entgegen einer Wirkung einer ersten Feder 21, die als dritte Gasdruckfeder ausgeführt ist, verschiebbar gelagert. Diese Feder 21 wirkt zwischen Schieber 18 und Blechhalter 11 und drückt den Schieber 18 entlang seiner ersten Linearführung 22 am Blechhalter 11 von der Matrize 6 weg. Dadurch kommt der Schieber 18 in der Arbeitsposition 16 des Distanzelements 14 der Matrize 6 am nächsten, welche Position 23 des Schiebers in der Fig. 3 zu entnehmen ist. In Ruheposition 15 des Distanzelements 14 ist Schieber 18 von der Matrize 6 am weitersten entfernt angeordnet. Damit werden diesbezüglich entstehende Störkonturen beim Beschicken des Umformwerkzeugs 1 verhindert.Again Fig. 1 can further be seen, the slide 18 is slidably mounted against an action of a first spring 21, which is designed as a third gas pressure spring. This spring 21 acts between the slide 18 and the sheet metal holder 11 and presses the slide 18 along its first linear guide 22 on the sheet metal holder 11 away from the die 6. As a result, the slider 18 in the working position 16 of the spacer element 14 comes closest to the die 6, which position 23 of the slider in the Fig. 3 can be seen. In the rest position 15 of the spacer element 14, the slide 18 is arranged furthest away from the die 6. In this way, disruptive contours that arise in this way when loading the forming tool 1 are prevented.

Der Fig. 1 ist zudem zu entnehmen, dass der Niederhalter 7 eine der Matrize 6 radial vorstehende Schulter 25 ausbildet, welche einen Gegenanschlag 26 für den Anschlag 24 des Distanzelements 14 ausbildet. Dieser Gegenanschlag 26 ist auf dem axial vorspringenden Abschnitt 27 der radial vorstehenden Schulter 25 vorgesehen, wodurch das Distanzelement 14 in seiner Höhe demensprechend verringert ausgeführt werden kann.The Fig. 1 it can also be seen that the holding-down device 7 forms a shoulder 25 which projects radially from the die 6 and which forms a counter-stop 26 for the stop 24 of the spacer element 14. This counter-stop 26 is provided on the axially projecting section 27 of the radially projecting shoulder 25, as a result of which the spacer element 14 can be reduced in height accordingly.

Vorteilhaft ist das Distanzelement 14 am Schieber 18 entgegen der Wirkung einer zweiten Feder 28 verschiebbar gelagert. Diese als vierte Gasdruckfeder ausgeführte Feder 21 wirkt zwischen Distanzelement 14 und Schieber 18 und belastet das Distanzelement 14 entlang seiner zweiten Linearführung 31 am Schieber 18 mit einer Wirkungsrichtung 29, die zur Wirkungsrichtung 30 der ersten Feder 21 entgegensetzt ist. Dadurch kann das Distanzelement 14 unter Vorspannung in seine Arbeitsposition 16 gebracht werden, welche Vorspannung in Fig. 2 anhand der Verlagerung des Distanzelements 14 entgegen der Wirkung der zweiten Feder 28 zu erkennen ist.The spacer element 14 is advantageously mounted on the slide 18 so as to be displaceable against the action of a second spring 28. This designed as the fourth gas pressure spring Spring 21 acts between spacer element 14 and slide 18 and loads spacer element 14 along its second linear guide 31 on slide 18 with a direction of action 29 which is opposite to direction of action 30 of first spring 21. As a result, the spacer element 14 can be brought into its working position 16 under pre-tension, which pre-tension in Fig. 2 on the basis of the displacement of the spacer element 14 against the action of the second spring 28.

Zudem ist in den Figuren 1 bis 4 zu erkennen, dass die erste und zweite Linearführungen 22 und 31 parallel verlaufen.In addition, in the Figures 1 to 4 to recognize that the first and second linear guides 22 and 31 run parallel.

Im Allgemeinen wird erwähnt - aber nicht dargestellt - dass der Schieber 18 auch am Werkzeugoberteil 5 beweglich gelagert und der Treiber am Blechhalter 11 befestigt sein kann. In diesem Fall bildet dann auch das Distanzelement einen Anschlag 24 für den Blechhalter 11 aus, um den Abstand zwischen Blechhalter 11 und Niederhalter 7 festzustellen. Auch ist vorstellbar, dass das Distanzelement 14 je einen Anschlag 24 für Blechhalter 11 und Niederhalter 7 ausbildet - dies ist ebenfalls nicht dargestellt.In general, it is mentioned - but not shown - that the slide 18 can also be movably mounted on the upper tool part 5 and the driver can be fastened to the sheet metal holder 11. In this case, the spacer element then also forms a stop 24 for the sheet metal holder 11 in order to determine the distance between the sheet metal holder 11 and hold-down device 7. It is also conceivable that the spacer element 14 each forms a stop 24 for sheet metal holder 11 and hold-down 7 - this is also not shown.

Claims (8)

  1. Forming tool, comprising a first tool part (3) which has a tool upper part (5) and a die (6) with a movably inserted holding-down device (7) that is supported against the tool upper part (5) via a first pressing means (8), a second tool part (4) which has a tool lower part (9), a stamp (10) that cooperates with the die (6) for forming purposes, and a movable sheet holder (11) that is supported against the tool lower part (9) via a second pressing means (12), and a locking device (13) which is provided between the sheet holder (11) and the holding-down device (7) and which has at least one spacer element (14), which spacer element (14) is mounted such as to be movable, as a function of a relative movement that occurs as the forming tool (1) is being closed, from a rest position (15) into a working position (16) which defines the distance between the sheet holder (11) and the holding-down device (7) as the forming tool (1) is being opened, characterized in that the locking device (13) has at least one wedge drive (17) with a slider (18) and a driver (19), wherein the slider (18) having the spacer element (14) is mounted such as to be displaceable, upon contact with the driver (19) and as a function of the relative movement that occurs between the sheet holder (11) and the tool upper part (5) as the forming tool (1) is being closed, in order to move the spacer element (14) into its working position (16).
  2. Forming tool according to claim 1, characterized in that the spacer element (14) in its working position (16) forms a stop (24) for the holding-down device (7) and/or the sheet holder (11) in order to set the distance between the sheet holder (11) and the holding-down device (7).
  3. Forming tool according to claim 2, characterized in that the holding-down device (7) has a shoulder (25) which protrudes radially beyond the die (6) and which forms a counter-stop (26) for the stop (24) of the spacer element (14).
  4. Forming tool according to claim 1, 2 or 3, characterized in that the driver (19) is attached to the tool upper part (5) and the slider (18) is displaceably mounted on the sheet holder (11).
  5. Forming tool according to any one of claims 1 to 4, characterized in that the slider (18) is mounted such as to be displaceable, upon contact with the driver (19), counter to the action of a first spring (21).
  6. Forming tool according to claim 5, characterized in that the spacer element (14) is mounted on the slider (18) such as to be displaceable counter to the action of a second spring (28), the direction of action (29) of which is opposite to the direction of action (30) of the first spring (21).
  7. Forming tool according to any one of claims 1 to 6, characterized in that the slider (18) is displaceably mounted such that it assumes its position (23) closest to the die (6) in the working position (16) of the spacer element (14).
  8. Forming tool according to any one of claims 1 to 7, characterized in that the first and second pressing means (8, 12) are configured as gas pressure springs (108, 112).
EP16828948.6A 2015-12-30 2016-12-23 Forming tool Active EP3397408B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SI201630719T SI3397408T1 (en) 2015-12-30 2016-12-23 Forming tool

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP15203211.6A EP3187276A1 (en) 2015-12-30 2015-12-30 Forming tool
PCT/EP2016/082601 WO2017114790A1 (en) 2015-12-30 2016-12-23 Forming tool

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EP3397408A1 EP3397408A1 (en) 2018-11-07
EP3397408B1 true EP3397408B1 (en) 2020-02-05

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EP15203211.6A Withdrawn EP3187276A1 (en) 2015-12-30 2015-12-30 Forming tool
EP16828948.6A Active EP3397408B1 (en) 2015-12-30 2016-12-23 Forming tool

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US (1) US11389852B2 (en)
EP (2) EP3187276A1 (en)
JP (1) JP6811780B2 (en)
KR (2) KR102624949B1 (en)
CN (1) CN108883454B (en)
BR (1) BR112018013023B1 (en)
CA (1) CA3010420C (en)
ES (1) ES2789757T3 (en)
MX (1) MX2018008188A (en)
SI (1) SI3397408T1 (en)
WO (1) WO2017114790A1 (en)

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FR3095358B1 (en) * 2019-04-24 2022-05-27 Psa Automobiles Sa STAMPING PRESS FOR METAL PLATES, WITH MECHANICAL LOCKING PIECE

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Publication number Publication date
US20190009322A1 (en) 2019-01-10
CN108883454A (en) 2018-11-23
MX2018008188A (en) 2018-11-09
WO2017114790A1 (en) 2017-07-06
SI3397408T1 (en) 2020-07-31
JP6811780B2 (en) 2021-01-13
KR20180098583A (en) 2018-09-04
CA3010420A1 (en) 2017-07-06
KR20240014576A (en) 2024-02-01
EP3397408A1 (en) 2018-11-07
CN108883454B (en) 2020-09-11
US11389852B2 (en) 2022-07-19
ES2789757T3 (en) 2020-10-26
CA3010420C (en) 2024-01-09
BR112018013023A2 (en) 2018-12-04
JP2019500219A (en) 2019-01-10
KR102624949B1 (en) 2024-01-15
EP3187276A1 (en) 2017-07-05
ES2789757T8 (en) 2022-02-28
BR112018013023B1 (en) 2021-11-03

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