EP0140189A1 - Device for feeding sheet blanks to the drawing station of a multistage press - Google Patents

Device for feeding sheet blanks to the drawing station of a multistage press Download PDF

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Publication number
EP0140189A1
EP0140189A1 EP84111739A EP84111739A EP0140189A1 EP 0140189 A1 EP0140189 A1 EP 0140189A1 EP 84111739 A EP84111739 A EP 84111739A EP 84111739 A EP84111739 A EP 84111739A EP 0140189 A1 EP0140189 A1 EP 0140189A1
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EP
European Patent Office
Prior art keywords
sheet metal
metal blanks
intermediate storage
transfer
station
Prior art date
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Granted
Application number
EP84111739A
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German (de)
French (fr)
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EP0140189B1 (en
Inventor
Hans Braun
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L Schuler GmbH
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L Schuler GmbH
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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
    • B21D43/057—Devices for exchanging transfer bars or grippers; Idle stages, e.g. exchangeable

Definitions

  • the invention relates to a device for feeding sheet metal blanks to the first processing stage, in particular to the drawing stage of a multi-stage press, with conveying means for removing sheet metal blanks from a supply stack and for storing them in an intermediate storage station, for removing them from this and for transporting and storing them in the first processing station and with transfer rails that can be driven in the transfer direction, in the lifting and lowering direction and in the closing and opening direction and gripping devices attached to them for the transport of the workpieces between the processing stages.
  • DE-OS 29 00 526 describes a feeding device for sheet metal blanks for the first stage of a step press with the generic features.
  • the sheet metal blanks are removed from the supply stack by means of suction lifters of a vertical lifter, taken over by suction cups of a horizontal conveyor in the raised position and fed to the step press.
  • the feed takes place in time with the press and in synchronous movement to the transfer rails between the processing stages.
  • This feed device can only be used to a limited extent for multi-stage presses with a drawing stage as the first processing stage.
  • the orientation of the sheet metal blanks through the supply stack is not sufficient for a perfect storage in the drawing tool, and it is not ensured that the predetermined orientation is retained on the transport route to the drawing step.
  • the object of the invention is to provide a device for feeding sheet metal blanks to the first processing stage of a multi-stage press, with which the orientation of each sheet metal blank takes place and is maintained during the feed. Particular emphasis is placed on the separation of the orientation movements; the movement of the sheet metal blank in this direction is to be used for the alignment of the sheet metal blanks in the direction of the press run and the closing movement of the gripper rails for the alignment of the sheet metal blanks transversely to the direction of the press pass.
  • the object is achieved in devices of the generic type in that two intermediate storage stations are provided before the drawing stage, of which the first intermediate storage station is designed as an alignment station for the sheet metal blanks in relation to the first processing station, with fixed and, if necessary, movable attachment means for aligning the Sheet metal blanks at least in the direction of the press run, and that the transfer rails are extended and can thus be guided into the area of the first clipboard statics, passive gripping tools for grasping the sheet metal blanks during transfer and for storing them in the second clipboard station and active gripping tools for removing the Sheet metal blanks from the second intermediate storage station have for gripping, transport and storage in the drawing stage.
  • the device according to the invention advantageously detects the sheet metal blanks before the unshaped sheet metal blank is placed in the drawing tool with the movement of the shaped workpieces in the individual machining stages.
  • the sheet metal blanks can be lifted from the stack by means of an unstacking device via e.g. a roller conveyor is brought to transport height and held in it. When the transport height is reached, the sheet metal blanks are preferably aligned for the first time.
  • an unstacking device via e.g. a roller conveyor is brought to transport height and held in it.
  • the sheet metal blanks are preferably aligned for the first time.
  • the position of the sheet metal blanks set in the direction of passage by means of the alignment station is advantageously maintained and inaccuracies occurring during long press operation are compensated for.
  • Irregularly shaped sheet metal blanks for example trapezoidal blanks, can be gripped by the gripping tools of the transfer rails without loss of accuracy.
  • the press 1 in FIG. 1 is shown only in the area of the feed of the sheet metal blanks and only indicated with the columns 2 and the press table 3.
  • the transfer rails 7 and 8 extend on both sides of the tools 4 and 6.
  • the transfer rail 8 is shown in a backward motion.
  • the vertical rod 9 the adjusting head 11 and the transverse rods 12, the possibility of adjusting the transfer rails in the open-close direction 50 is indicated.
  • the transfer rails can also be driven in the transfer direction, this corresponds to the direction of press travel 49, and in the lifting and lowering direction 51.
  • the first processing stage 6 seen in the direction of the press run is designed as a drawing stage, the second and each further processing stage is positioned with 4 and serves for further shaping of the workpieces 31.
  • the workpieces 31 are fed to the press as sheet metal blanks 28, 29, which are conveyed via a first conveying means 23 and possibly a second conveying means 24 are removed from supply stacks 22 via suction lifters 26, 27, placed on a roller conveyor or fed directly to a first intermediate storage station 17.
  • the gripper rails are extended over the initial length that was previously required to take workpieces 31 from the first processing station 6 in order to transport them to the next processing station 4 and deposit them in the tool present here, up to the area of the first intermediate storage station 17, and here they are passive Gripping tools 13, which are described with reference to FIGS.
  • the existing sheet metal blank 29 can be detected by means of active gripping tools 14, as described in DE-AS 18 02 630, for example, and can be removed from this position with the movement of the transfer rails 7, 8 in the die of the drawing stage 6.
  • Position 16 refers to other gripping tools required for transporting the workpieces.
  • the first intermediate storage station 17 has spring-loaded stops 19, against which the incoming sheet metal blank 28 initially runs. The return of the deflection movement of these stops 19 leads to a uniform contact of the sheet metal blank with fixed stops 21.
  • the sheet metal blank is then aligned in the direction of the press pass 49 with respect to the drawing stage 6.
  • the roller conveyor can be extended beyond the second intermediate storage station 18.
  • the position of a ferromagnetic sheet metal blank 29 can be secured here, for example, by magnetic means 52.
  • the sheet metal blank is aligned transversely to the direction of press travel 49 with the closing movement 50 of the transfer rails 7, 8 with the application of appropriate stops attached to the grippers 13. These stops are formed by shaped pieces 45, 46, as are described in detail in FIGS. 2 and 3.
  • FIG. 2 and 3 show a passive gripper rail 13 which is attached to the upper side of the transfer rail 7 and 8, respectively.
  • a passive gripper rail 13 which is attached to the upper side of the transfer rail 7 and 8, respectively.
  • two rails 32 rigidly attached to the transfer rail, a carriage 34 movable thereon in the direction of passage 49 (FIG. 1), a cross slide 36 mounted therein and displaceable transversely, a pressure plate 38 and only one clamping piece 39 and a jaw 33.
  • the gripping device is adjustable for the purpose of setting up by loosening the clamping piece 39 in the direction of the press and transversely thereto.
  • the transverse slide 36 has an elongated hole 37.
  • the extension of the cross slide 36 form one or more support arms 40, to which 43 angle plates 41 are connected via bracket plates.
  • two support arms 40 are connected to the locking means for receiving a gripping member.
  • further gripping members can be arranged on a locking means.
  • the angle plate 41 carries a base plate 42, into which shaped pieces 45, 46 are inserted or onto which they are placed.
  • the fittings 45, 46 are designed here as cylinder bolts, which are supported on the bracket 41 via bearing blocks 44.
  • the shaped pieces or cylinder bolts 45, 46 are chamfered at 47 or have a strong draft in these areas for better running-in of the sheet metal blanks and for avoiding canting. 2 also shows the shaped pieces 45, 46 in a lowered position 48 with an end part of a sheet metal blank 28 to be received.
  • the shaped pieces 45, 46 have different heights, the cylinder 45 projects beyond the cylinder 46 by an amount that is equal to or larger than the thickest sheet thickness to be processed ke of a trapezoidal sheet metal blank 28, for example.
  • the dashed line in FIG. 3 refers to the area of a trapezoidal sheet metal blank to be grasped by the gripping device.
  • the infeed 50 of the gripping tools 13 against the blank 28 takes place in the lowered position 51 (FIG. 2) of the transfer rail 7, 8, initially only the shaped piece 45 being in contact with the sheet metal blank 28.
  • the alignment takes place in the direction of the arrow 50, that is to say transversely to the direction of the press passage 49.
  • the shaped piece 46 comes to rest against the edge of the sheet metal blank 28 during the upward movement (lifting) of the transfer rails 7, 8.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Press Drives And Press Lines (AREA)
  • Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)

Abstract

Die Einrichtung zum Zuführen von Blechzuschnitten (28, 29) zur ersten Bearbeitungsstufe (6) ermöglicht das Ausrichten dieser in Richtung (49) des Pressendurchlaufes und in Richtung (50) quer hierzu durch die Zuführbewegung. Hierzu sind eine erste Zwischenablagestation (17) mit festen und federelastischen Anschlägen (19, 21) und eine zweite Zwischenablagestation (18) vorgesehen vor der ersten Bearbeitungsstufe zur Aufnahme der Blechzuschnitte durch aktive Greifzeuge (14) an den Transferschienen (7,8). Diese sind bis in den Bereich der ersten Zwischenablagestation verlängert und weisen für die Übernahme und den Weitertransport formgestaltete passive Greifzeuge (13) auf.

Figure imgaf001
The device for feeding sheet metal blanks (28, 29) to the first processing stage (6) enables them to be aligned in the direction (49) of the press run and in the direction (50) transversely thereto by the feed movement. For this purpose, a first intermediate storage station (17) with fixed and spring-elastic stops (19, 21) and a second intermediate storage station (18) are provided before the first processing stage for receiving the sheet metal blanks by active gripping tools (14) on the transfer rails (7, 8). These are extended to the area of the first intermediate storage station and have passive gripping tools (13) designed for the transfer and further transport.
Figure imgaf001

Description

Die Erfindung betrifft eine Einrichtung zum Zuführen von Blechzuschnitten zur ersten Bearbeitungsstufe, insbesondere zur Ziehstufe einer Mehrstufenpresse, mit Fördermitteln zur Entnahme von Blechzuschnitten aus einem Vorratsstapel und zur Ablage in einer Zwischenablagestation, zur Entnahme aus dieser und zum Transport und zur Ablage in der ersten Bearbeitungsstation und mit in Transferrichtung, in Hebe- und Senkrichtung und in Schließ- und Öffnenrichtung antreibbaren Transferschienen und an diesen angebrachten Greifzeugen für den Transport der Werkstücke zwischen den Bearbeitungsstufen.The invention relates to a device for feeding sheet metal blanks to the first processing stage, in particular to the drawing stage of a multi-stage press, with conveying means for removing sheet metal blanks from a supply stack and for storing them in an intermediate storage station, for removing them from this and for transporting and storing them in the first processing station and with transfer rails that can be driven in the transfer direction, in the lifting and lowering direction and in the closing and opening direction and gripping devices attached to them for the transport of the workpieces between the processing stages.

Die Zufuhr von Blechzuschnitten zu den Form- und Umformwerkzeugen in Mehrstufenpressen ist heute vollautomatisiert und bedarf in der Regel nur noch der Überwachung. Fehlsteuerungen, wie z.B. die Doppeltzufuhr von Blechzuschnitten, führen zu einem rechtzeitigen Abschalten der Presse oder bei ermöglichtem Mehraufwand in der Zufuhr zu einem Ausstoß der Blechzuschnitte bereits im Zufuhrbereich- ohne Pressenabschaltung. Aus Kostengründen wird jedoch der Mehraufwand zu Ungunsten der Ausnutzung der Presse verringert. Darüber hinaus wird bei Mehrstufenpressen und insbesondere solchen für Großteile in der ersten Bearbeitungsstufe eine Ziehstufe vorgesehen, um ein Wenden der großflächigen Teile zu umgehen. Die Zufuhr der Blechzuschnitte erfordert hierbei größere Genauigkeit, insbesondere dann, wenn der Ziehvorgang ohne Blechniederhalterung erfolgt.The supply of sheet metal blanks to the forming and forming tools in multi-stage presses is now fully automated and generally only requires monitoring. Faulty controls, e.g. the double feeding of sheet metal blanks leads to a timely shutdown of the press or, if additional effort is required in the feeding, to an ejection of the sheet metal blanks in the feed area - without press shutdown. For cost reasons, however, the additional effort is reduced to the disadvantage of using the press. In addition, in the case of multi-stage presses and in particular those for large parts, a drawing stage is provided in the first processing stage in order to avoid turning the large-area parts. The feeding of the sheet metal blanks requires greater accuracy, especially if the drawing process is carried out without holding down the sheet metal.

In der DE-OS 29 00 526 wird eine Zufuhreinrichtung für Blechzuschnitte zur ersten Stufe einer Stufenpresse beschrieben mit den gattungbildenden Merkmalen. Die Blechzuschnitte werden vermittels Saughebern eines Vertikalhebers dem Vorratsstapel entnommen, in der hochgefahrenen Position von Saugnäpfen eines Horizontalförderers übernommen und der Stufenpresse zugeführt. Die Zufuhr erfolgt im Takt der Presse und in synchroner Bewegung zu den Transferschienen zwischen den Bearbeitungsstufen. Diese Zuführeinrichtung ist für Mehrstufenpressen mit einer Ziehstufe als erster Bearbeitungsstufe nur bedingt verwendbar. Die Orientierung der Blechzuschnitte durch den Vorratsstapel reicht für eine einwandfreie Ablage in den Ziehwerkzeug nicht aus, und es ist nicht sichergestellt, daß die vorgegebene Orientierung auf dem Transportweg zur Ziehstufe erhalten bleibt.DE-OS 29 00 526 describes a feeding device for sheet metal blanks for the first stage of a step press with the generic features. The sheet metal blanks are removed from the supply stack by means of suction lifters of a vertical lifter, taken over by suction cups of a horizontal conveyor in the raised position and fed to the step press. The feed takes place in time with the press and in synchronous movement to the transfer rails between the processing stages. This feed device can only be used to a limited extent for multi-stage presses with a drawing stage as the first processing stage. The orientation of the sheet metal blanks through the supply stack is not sufficient for a perfect storage in the drawing tool, and it is not ensured that the predetermined orientation is retained on the transport route to the drawing step.

Demgegenüber liegt die Aufgabe der Erfindung in der Schaffung einer Einrichtung zum Zuführen von Blechzuschnitten zur ersten Bearbeitungsstufe einer Mehrstufenpresse, mit der im Verlauf der Zufuhr die Orientierung jedes Blechzuschnittes erfolgt und erhalten bleibt. Hierbei wird besonderer Wert auf die Trennung der Orientierungsbewegungen gelegt; es soll für die Ausrichtung der Blechzuschnitte in Richtung des Pressendurchlaufes die Bewegung des Blechzuschnittes in dieser Richtung und für eine Ausrichtung der Blechzuschnitte quer zur Richtung des Pressendurchlaufes die Schließbewegung der Greiferschienen genutzt werden.In contrast, the object of the invention is to provide a device for feeding sheet metal blanks to the first processing stage of a multi-stage press, with which the orientation of each sheet metal blank takes place and is maintained during the feed. Particular emphasis is placed on the separation of the orientation movements; the movement of the sheet metal blank in this direction is to be used for the alignment of the sheet metal blanks in the direction of the press run and the closing movement of the gripper rails for the alignment of the sheet metal blanks transversely to the direction of the press pass.

Die Aufgabe wird bei Einrichtungen der gattungsgemäßen Art dadurch gelöst, daß zwei Zwischenablagestationen vor der Ziehstufe vorgesehen sind, von der die erste Zwischenablagestation als Ausrichtstation für die Blechzuschnitte in Bezug auf die erste Bearbeitungsstation ausgebildet ist, mit festen und ggf. beweglichen Anschlagmitteln für die Ausrichtung der Blechzuschnitte zumindest in Richtung des Pressendurchlaufes, und daß die Transferschienen verlängert und so bis in den Bereich der ersten Zwischenablagestaticn führbar sind, in dieser jeweils passive Greifzeuge zum Unterfassen der Blechzuschnitte beim Transfer und zur Ablage dieser in der zweiten Zwischenablagestation und aktive Greifzeuge für die Entnahme der Blechzuschnitte aus der zweiten Zwischenablagestation aufweisen zum Erfassen, Transport und zur Ablage in der Ziehstufe.The object is achieved in devices of the generic type in that two intermediate storage stations are provided before the drawing stage, of which the first intermediate storage station is designed as an alignment station for the sheet metal blanks in relation to the first processing station, with fixed and, if necessary, movable attachment means for aligning the Sheet metal blanks at least in the direction of the press run, and that the transfer rails are extended and can thus be guided into the area of the first clipboard statics, passive gripping tools for grasping the sheet metal blanks during transfer and for storing them in the second clipboard station and active gripping tools for removing the Sheet metal blanks from the second intermediate storage station have for gripping, transport and storage in the drawing stage.

Durch die Einrichtung nach der Erfindung werden in vorteilhafter Meise die Blechzuschnitte erfaßt bevor mit der Bewegung der geformten Werkstücke in den einzelnen Bearbeitungsstufen der ungeformte Blechzuschnitt in das Ziehwerkzeug abgelegt wird.The device according to the invention advantageously detects the sheet metal blanks before the unshaped sheet metal blank is placed in the drawing tool with the movement of the shaped workpieces in the individual machining stages.

Die Blechzuschnitte können nach dem Abheben vom Vorratsstapel vermittels einer Entstapeleinrichtung über z.B. eine Rollenbahn auf Transporthöhe gebracht und in dieser gehalten werden. Mit dem Erreichen der Transporthöhe erfolgt in bevorzugter Weise die erste Ausrichtung der Blechzuschnitte.The sheet metal blanks can be lifted from the stack by means of an unstacking device via e.g. a roller conveyor is brought to transport height and held in it. When the transport height is reached, the sheet metal blanks are preferably aligned for the first time.

Mit den bevorzugten Merkmalen nach den Kennzeichen der Ansprüche 2 bis 8 wird vorteilhaft die in Durchlaufrichtung vermittels der Ausrichtstation eingestellte Lage der Blechzuschnitte beibehalten und bei langem Pressenbetrieb auftretende Ungenauigkeiten ausgeglichen. Es sind unregelmäßig geformte Blechzuschnitte, beispielsweise trapezförmige Platinen, ohne Genauigkeitsverlust von den Greifzeugen der Transferschienen erfaßbar.With the preferred features according to the characterizing part of claims 2 to 8, the position of the sheet metal blanks set in the direction of passage by means of the alignment station is advantageously maintained and inaccuracies occurring during long press operation are compensated for. Irregularly shaped sheet metal blanks, for example trapezoidal blanks, can be gripped by the gripping tools of the transfer rails without loss of accuracy.

Die vorteilhafte Aufhängung der Greifzeuge vermittels der Einrichtung nach den Patentansprüchen 6 oder 7 gewährleistet eine große Genauigkeitskonstanz bei guter Zugänglichkeit zu den Greifzeugen.The advantageous suspension of the gripping devices by means of the device according to claims 6 or 7 ensures a high level of accuracy with good accessibility to the gripping devices.

Im folgenden wird die Erfindung anhand einer bevorzugten Ausführung unter Rückbeziehung auf die Darstellung in den Figuren beschrieben.The invention is described below on the basis of a preferred embodiment with reference to the representation in the figures.

Es zeigen in starken Verkleinerungen:

  • Fig. 1 die Zufuhreinrichtung in vereinfachter Darstellung mit Blick auf die Transportebene der Blechzuschnitte,
  • Fig. 2 ein an einer Transferschiene befestigtes Greifzeug in Teilschnitt und
  • Fig. 3 eine Draufsicht auf das Greifzeug nach Fig. 2.
In sharp reductions, they show:
  • 1 shows the feed device in a simplified representation with a view of the transport plane of the sheet metal blanks,
  • Fig. 2 is a gripping device attached to a transfer rail in partial section and
  • 3 shows a top view of the gripping device according to FIG. 2.

Die Presse 1 in Fig. 1 ist nur im Bereich der Zufuhr der Blechzuschnitte und nur angedeutet dargestellt mit den Säulen 2 und dem Pressentisch 3. In Pressendurchlaufrichtung 49 erstrecken sich beidseitig der Werkzeuge 4 und 6 je eine Transferschiene 7 bzw. 8. Die Transferschiene 8 ist in einer Rückbewegung gezeigt. Für die Transferschienen 7, 8 sind keine weiteren Lager bzw. Gleit- und Führungsmittel dargestellt. Mit der Vertikalstange 9, dem Verstellkopf 11 und den Querstangen 12 wird die Verstellmöglichkeit der Transferschienen in öffnen-Schließrichtung 50 angedeutet. Die Transferschienen sind darüber hinaus auch in Transferrichtung, diese entspricht der Pressendurchlaufrichtung 49, und in Hebe- und Senkrichtung 51 antreibbar. Die in Pressendurchlaufrichtung gesehen erste Bearbeitungsstufe 6 ist hierbei als eine Ziehstufe ausgebildet, die zweite und jede weitere Bearbeitungsstufe ist mit 4 positioniert und dient weiterer Formgebung der Werkstücke 31. Die Werkstücke 31 werden als Blechzuschnitte 28, 29 der Presse zugeführt, die über ein erstes Fördermittel 23 und ggf. ein zweites Fördermittel 24 aus Vorratsstapeln 22 über Saugheber 26, 27 entnommen, auf eine Rollenbahn abgesetzt oder direkt einer ersten Zwischenablagestation 17 zugeführt werden. Die Greiferschienen sind über die Ausgangslänge, die bisher erforderlich war, Werkstücke 31 aus der ersten Bearbeitungsstation 6 aufzunehmen, um diese zur nächsten Bearbeitungsstation 4 zu transportieren und in dem hier vorhandenen Werkzeug abzusetzen, bis in den Bereich der ersten Zwischenablagestation 17 verlängert und weisen hier passive Greifzeuge 13 auf, die zu den Fig. 2 und 3 beschrieben werden. Der in der ersten Zwischenablagestation 17 auf einer planen Ebene, die beispielsweise durch die Rollenbahn des Zuführers gebildet sein kann, abgelegte Blechzuschnitt 28 wird mit der Bewegung der Transferschienen erfaßt und in einer zweiten Zwischenablagestation 18 abgelegt. In dieser Stellung ist der hier vorhandene Blechzuschnitt 29 vermittels aktiver Greifzeuge 14, wie sie in beispielsweise der DE-AS 18 02 630 beschrieben wurden, erfaßbar und aus dieser Stellung mit der Bewegung der Transferschienen 7, 8 in dem Werkzeug der Ziehstufe 6 absetzbar. Die Position 16 verweist auf weitere, zum Transport der Werkstücke erforderliche Greifzeuge. Die erste Zwischenablagestation 17 weist federbelastete Anschläge 19 auf, gegen die der ankamende Blechzuschnitt 28 zunächst anläuft. Die Rückführung der Auslenkbewegung dieser Anschläge 19 führt zu einer gleichmäßigen Anlage des Blechzuschnittes an festen Anschlägen 21. Der Blechzuschnitt ist dann in Pressendurchlaufrichtung 49 in Bezug auf die Ziehstufe 6 ausgerichtet. Um ein Durchhängen des Blechzuschnittes 28 während des Transportes aus der Zwischenablagestation 17 in die Zwischenablagestation 18 zu vermeiden, kann die Rollenbahn bis über die zweite Zwischenablagestation 18 hinaus verlängert sein. Die Lage eines ferromagnetischen Blechzuschnittes 29 kann hier durch beispielsweise Magnetmittel 52 gesichert werden. Die Ausrichtung des Blechzuschnittes quer zur Pressendurchlaufrichtung 49 erfolgt mit der Schließbewegung 50 der Transferschienen 7, 8 unter Anlage entsprechender, an den Greifern 13 angebrachter Anschläge. Diese Anschläge werden durch Formstükke 45, 46 gebildet, wie sie im einzelnen in den Fig. 2 und 3 beschrieben werden.The press 1 in FIG. 1 is shown only in the area of the feed of the sheet metal blanks and only indicated with the columns 2 and the press table 3. In the press passage direction 49, the transfer rails 7 and 8 extend on both sides of the tools 4 and 6. The transfer rail 8 is shown in a backward motion. For the transfer rails 7, 8 there are no further bearings or sliding and guiding shown. With the vertical rod 9, the adjusting head 11 and the transverse rods 12, the possibility of adjusting the transfer rails in the open-close direction 50 is indicated. The transfer rails can also be driven in the transfer direction, this corresponds to the direction of press travel 49, and in the lifting and lowering direction 51. The first processing stage 6 seen in the direction of the press run is designed as a drawing stage, the second and each further processing stage is positioned with 4 and serves for further shaping of the workpieces 31. The workpieces 31 are fed to the press as sheet metal blanks 28, 29, which are conveyed via a first conveying means 23 and possibly a second conveying means 24 are removed from supply stacks 22 via suction lifters 26, 27, placed on a roller conveyor or fed directly to a first intermediate storage station 17. The gripper rails are extended over the initial length that was previously required to take workpieces 31 from the first processing station 6 in order to transport them to the next processing station 4 and deposit them in the tool present here, up to the area of the first intermediate storage station 17, and here they are passive Gripping tools 13, which are described with reference to FIGS. 2 and 3. The sheet metal blank 28 deposited in the first intermediate storage station 17 on a flat plane, which can be formed, for example, by the roller conveyor of the feeder, is detected with the movement of the transfer rails and stored in a second intermediate storage station 18. In this position, the existing sheet metal blank 29 can be detected by means of active gripping tools 14, as described in DE-AS 18 02 630, for example, and can be removed from this position with the movement of the transfer rails 7, 8 in the die of the drawing stage 6. Position 16 refers to other gripping tools required for transporting the workpieces. The first intermediate storage station 17 has spring-loaded stops 19, against which the incoming sheet metal blank 28 initially runs. The return of the deflection movement of these stops 19 leads to a uniform contact of the sheet metal blank with fixed stops 21. The sheet metal blank is then aligned in the direction of the press pass 49 with respect to the drawing stage 6. To prevent the sheet metal blank 28 from sagging during transport from the clipboard station 17 into the clipboard To avoid station 18, the roller conveyor can be extended beyond the second intermediate storage station 18. The position of a ferromagnetic sheet metal blank 29 can be secured here, for example, by magnetic means 52. The sheet metal blank is aligned transversely to the direction of press travel 49 with the closing movement 50 of the transfer rails 7, 8 with the application of appropriate stops attached to the grippers 13. These stops are formed by shaped pieces 45, 46, as are described in detail in FIGS. 2 and 3.

Die Fig. 2 und 3 zeigen eine passive Greiferschiene 13, die an der Cberseite der Transferschiene 7 bzw. 8 befestigt ist. Hierzu dienen eine oder, wie gezeigt, zwei starr an der Transferschiene angebrachte Laufschienen 32, ein an diesen in Durchlaufrichtung 49 (Fig. 1) bewegbarer Schlitten 34, ein in diesem und querverschieblich gelagerter Querschieber 36, eine Druckplatte 38 und nur ein Spannstück 39 und eine Klemmbacke 33. Das Greifzeug ist zum Zwecke des Einrichtens durch Lösen des Spannstückes 39 in Pressendurchlaufrichtung und quer hierzu verstellbar. Für die Querverstellbarkeit weist der Querschieber 36 ein Langloch 37 auf. Die Verlängerung des Querschiebers 36 bilden ein oder mehrere Tragarme 40, an die über Konsolbleche 43 Winkelbleche 41 angeschlossen sind. Im Ausführungsbeispiel sind an dem Feststellmittel zwei Tragarme 40 angeschlossen zur Aufnahme eines Greiforganes. Es können in Abhängigkeit von dem Blechzuschnitt 28 (Fig. 1) weitere Greiforgane an einem Feststellmittel angeordnet sein. Das Winkelblech 41 trägt eine Grundplatte 42, in die Formstücke 45, 46 eingesetzt oder auf die solche aufgesetzt sind. Die Formstücke 45, 46 sind hier als Zylinderbolzen ausgeführt, die über Lagerböcke 44 an dem Winkelblech 41 abgestützt sind. Die Formstücke bzw. Zylinderbolzen 45, 46 sind bei 47 angefast bzw. weisen in diesen Bereichen eine starke Formschräge auf zum besseren Einlauf der Blechzuschnitte und zur Vermeidung von Verkantungen. Fig. 2 zeigt darüber hinaus die Formstücke 45, 46 in einer abgesenkten Stellung 48 mit einem Endteil eines aufzunehmenden Blechzuschnittes 28.2 and 3 show a passive gripper rail 13 which is attached to the upper side of the transfer rail 7 and 8, respectively. For this purpose, one or, as shown, two rails 32 rigidly attached to the transfer rail, a carriage 34 movable thereon in the direction of passage 49 (FIG. 1), a cross slide 36 mounted therein and displaceable transversely, a pressure plate 38 and only one clamping piece 39 and a jaw 33. The gripping device is adjustable for the purpose of setting up by loosening the clamping piece 39 in the direction of the press and transversely thereto. For the transverse adjustability, the transverse slide 36 has an elongated hole 37. The extension of the cross slide 36 form one or more support arms 40, to which 43 angle plates 41 are connected via bracket plates. In the embodiment, two support arms 40 are connected to the locking means for receiving a gripping member. Depending on the sheet metal blank 28 (FIG. 1), further gripping members can be arranged on a locking means. The angle plate 41 carries a base plate 42, into which shaped pieces 45, 46 are inserted or onto which they are placed. The fittings 45, 46 are designed here as cylinder bolts, which are supported on the bracket 41 via bearing blocks 44. The shaped pieces or cylinder bolts 45, 46 are chamfered at 47 or have a strong draft in these areas for better running-in of the sheet metal blanks and for avoiding canting. 2 also shows the shaped pieces 45, 46 in a lowered position 48 with an end part of a sheet metal blank 28 to be received.

Die Formstücke 45, 46 weisen entsprechend Fig. 2 unterschiedliche Höhen auf, der Zylinder 45 überragt den Zylinder 46 um ein Maß, das gleich oder größer ist als die dickste zu verarbeitende Blechstärke eines beispielsweise trapezförmigen Blechzuschnittes 28. Die gestrichelte Linie in Fig. 3 verweist auf den von dem Greifzeug zu erfassenden Bereich eines trapezförmigen Blechzuschnittes. Die Zustellung 50 der Greifzeuge 13 gegen den Zuschnitt 28 erfolgt in abgesenkter Stellung 51 (Fig. 2) der Transferschiene 7, 8, wobei zunächst nur das Formstück 45 zur Anlage an dem Blechzuschnitt 28 karmt. Bei dieser Bewegung erfolgt die Ausrichtung in Pfeilrichtung 50, also quer zur Pressendurchlaufrichtung 49. Das Formstück 46 kommt zur Anlage an der Kante des Blechzuschnittes 28 bei der Aufwärtsbewegung (Heben) der Transferschienen 7, 8.2, the shaped pieces 45, 46 have different heights, the cylinder 45 projects beyond the cylinder 46 by an amount that is equal to or larger than the thickest sheet thickness to be processed ke of a trapezoidal sheet metal blank 28, for example. The dashed line in FIG. 3 refers to the area of a trapezoidal sheet metal blank to be grasped by the gripping device. The infeed 50 of the gripping tools 13 against the blank 28 takes place in the lowered position 51 (FIG. 2) of the transfer rail 7, 8, initially only the shaped piece 45 being in contact with the sheet metal blank 28. During this movement, the alignment takes place in the direction of the arrow 50, that is to say transversely to the direction of the press passage 49. The shaped piece 46 comes to rest against the edge of the sheet metal blank 28 during the upward movement (lifting) of the transfer rails 7, 8.

Claims (8)

1. Einrichtung zum Zuführen von Blechzuschnitten (28, 29) zur ersten Bearbeitungsstufe, insbesondere zur Ziehstufe (6) einer Mehrstufenpresse (1), mit Fördermitteln (23, 24) zur Entnahme von Blechzuschnitten (28) aus einem Vorratsstapel (22) und zur Ablage in einer Zwischenablagestation (18), zur Entnahme aus dieser und zum Transport und zur Ablage in der ersten Bearbeitungsstation (6) und mit in Transferrichtung (49), in Hebe- und Senkrichtung (51) und in Schließ- und öffnenrichtung (50) antreibbaren Transferschienen (7, 8) und an diesen angebrachten Greifzeugen (13, 14, 16) für den Transport der Werkstücke (31) zwischen den Bearbeitungsstufen (6, 4), dadurch gekennzeichnet, daß zwei Zwischenablagestationen (17, 18) vor der Ziehstufe (6) vorgesehen sind, von der die erste Zwischenablagestation (17) als Ausrichtstation für die Blechzuschnitte (28) in Bezug auf die erste Bearbeitungsstation (6) ausgebildet ist, mit festen und ggf. beweglichen Anschlagmitteln (21, 19) für die Ausrichtung der Blechzuschnitte (28) zumindest in Richtung (49) des Pressendurchlaufes, und daß die Transferschienen (7, 8) verlängert und so bis in den Bereich der ersten Zwischenablagestation (17) führbar sind, in dieser jeweils passive Greifzeuge (13) zum Unterfassen der Blechzuschnitte (28) beim Transfer und zur Ablage dieser in der zweiten Zwischenablagestation (18) und aktive Greifzeuge (14) für die Entnahme der Blechzuschnitte (28) aus der zweiten Zwischenablagestation (18) aufweisen zum Erfassen, Transport und zur Ablage in der Ziehstufe (6).1. Device for feeding sheet metal blanks (28, 29) to the first processing stage, in particular to the drawing stage (6) of a multi-stage press (1), with funding (23, 24) for removing sheet metal blanks (28) from a stack of stocks (22) and Storage in an intermediate storage station (18), for removal from it and for transport and storage in the first processing station (6) and with in the transfer direction (49), in the lifting and lowering direction (51) and in the closing and opening direction (50) drivable transfer rails (7, 8) and attached gripping tools (13, 14, 16) for the transport of the workpieces (31) between the processing stages (6, 4), characterized in that two intermediate storage stations (17, 18) before the drawing stage (6) are provided, of which the first intermediate storage station (17) is designed as an alignment station for the sheet metal blanks (28) in relation to the first processing station (6), with fixed and possibly movable stop means (21, 19) for the outside Direction of the sheet metal blanks (28) at least in the direction (49) of the press run, and that the transfer rails (7, 8) are extended and can thus be guided into the region of the first intermediate storage station (17), in each of which passive gripping tools (13) can be gripped the sheet metal blanks (28) during transfer and for storing them in the second intermediate storage station (18) and active gripping tools (14) for removing the sheet metal blanks (28) from the second intermediate storage station (18) have for gripping, transport and storage in the drawing stage (6). 2. Einrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die passiven Greif zeuge (13) neben je einer Auflagefläche (Grundplatte 42) auch Formstücke (45) aufweisen zur Anlage der Blechzuschnitte (28) in Richtung (49) des Werkstückdurchlaufes durch die Mehrstufenpresse (1) und Formstücke (46) zur Anlage der Blechzuschnitte (28) bei der SchließbeMegung (50) der Transferschienen (7, 8).2. Device according to claim 1, characterized in that the passive gripping witnesses (13) in addition to each support surface (base plate 42) also have fittings (45) for engaging the sheet metal blanks (28) in the direction (49) of the workpiece pass through the multi-stage press ( 1) and fittings (46) for engaging the sheet metal blanks (28) in the closing arrangement (50) of the transfer rails (7, 8). 3. Einrichtung nach Anspruch 2, dadurch gekennzeichnet, daß die Formstücke (45, 46) in der Grundplatte (42) und über Lagerböcke (44) am Winkelblech (41) gelagerte Zylinderbolzen sind.3. Device according to claim 2, characterized in that the shaped pieces (45, 46) in the base plate (42) and via bearing blocks (44) on the angle plate (41) are mounted cylinder bolts. 4. Einrichtung nach den Ansprüchen 2 und 3, dadurch gekennzeichnet, daß die Formstücke (45, 46) Formschrägen (47) aufweisen für den Einlauf der Blechzuschnitte (28) in die Greifzeuge (13).4. Device according to claims 2 and 3, characterized in that the shaped pieces (45, 46) draft slopes (47) point for the entry of the sheet metal blanks (28) into the gripping tools (13). 5. Einrichtung nach den Ansprüchen 2 und 3, dadurch gekennzeichnet, daß die Formstücke (45) (Zylinderbolzen) der Greifzeuge (13) für die Querausrichtung die Formstücke (46) für die Längsausrichtung überragen.5. Device according to claims 2 and 3, characterized in that the shaped pieces (45) (cylinder bolts) of the gripping tools (13) for the transverse alignment project beyond the shaped pieces (46) for the longitudinal alignment. 6. Einrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Greifzeuge (13) über eine Feststellvorrichtung (32 bis 39) in Richtung des Pressendurchlaufes (49) und im wesentlichen quer (50) zu dieser Richtung verstellbar und fixierbar an den Transferschienen (7, 8) angebracht sind.6. Device according to claim 1, characterized in that the gripping tools (13) via a locking device (32 to 39) in the direction of the press run (49) and substantially transversely (50) to this direction adjustable and fixable on the transfer rails (7, 8) are attached. 7. Einrichtung nach Anspruch 6, dadurch gekennzeichnet, daß die Feststellvorrichtung zumindest eine an der Transferschiene (7, 8) befestigte Laufschiene (32), die sich in Richtung der Längsausdehnung der Transferschiene (7, 8) erstreckt, einen in dieser verschieblich gelagerten Schlitten (34), einen quer zur Laufschiene (32) gerichteten Querschieber (36), der an dem Schlitten (34) quer zur Laufschiene (32) beweglich gelagert ist und zur Aufnahme von Greifzeugen (13) dient und Spannmittel (33, 39) zum gemeinsamen Arretieren von Querschieber (36) und Schlitten (34) an der Laufschiene (32) aufweist.7. Device according to claim 6, characterized in that the locking device at least one on the transfer rail (7, 8) fixed rail (32) which extends in the direction of the longitudinal extension of the transfer rail (7, 8), a slidably mounted in this (34), a transverse slide (36) directed transversely to the running rail (32), which is movably mounted on the carriage (34) transversely to the running rail (32) and serves to receive gripping tools (13) and clamping means (33, 39) for common locking of cross slide (36) and slide (34) on the running rail (32). 8. Einrichtung nach Anspruch 1, dadurch gekennzeichnet, daß im Bereich der zweiten Zwischenablagestation (18) und im wesentlichen in Transporthöhe der Form des Blechzuschnittes (29) entsprechend ausrichtbare Haltemittel (Magnete 52) angebracht sind.8. Device according to claim 1, characterized in that in the region of the second intermediate storage station (18) and substantially at the transport height of the shape of the sheet metal blank (29) correspondingly orientable holding means (magnets 52) are attached.
EP84111739A 1983-10-04 1984-10-02 Device for feeding sheet blanks to the drawing station of a multistage press Expired EP0140189B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3335928 1983-10-04
DE19833335928 DE3335928A1 (en) 1983-10-04 1983-10-04 DEVICE FOR FEEDING SHEET CUTS TO THE LEVEL OF A MULTI-STAGE PRESS

Publications (2)

Publication Number Publication Date
EP0140189A1 true EP0140189A1 (en) 1985-05-08
EP0140189B1 EP0140189B1 (en) 1989-02-01

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EP84111739A Expired EP0140189B1 (en) 1983-10-04 1984-10-02 Device for feeding sheet blanks to the drawing station of a multistage press

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US (1) US4753103A (en)
EP (1) EP0140189B1 (en)
JP (1) JPH0653298B2 (en)
BR (1) BR8407101A (en)
DE (2) DE3335928A1 (en)
WO (1) WO1985001459A1 (en)

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DE4004289A1 (en) * 1989-03-13 1990-09-20 Warnke Umformtech Veb K Workpiece transfer device for multistage metal press - is hydraulically actuated and can be adjusted for height
WO2006128393A1 (en) * 2005-06-03 2006-12-07 Müller Weingarten AG Blank feeder

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DE4313416A1 (en) * 1993-04-23 1994-10-27 Mueller Weingarten Maschf Device for transporting parts in a step press
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KR101006449B1 (en) * 2004-04-08 2011-01-06 삼성전자주식회사 Distribution system for manufacturing liquid crystal display
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Also Published As

Publication number Publication date
US4753103A (en) 1988-06-28
JPS61500013A (en) 1986-01-09
JPH0653298B2 (en) 1994-07-20
EP0140189B1 (en) 1989-02-01
WO1985001459A1 (en) 1985-04-11
DE3476525D1 (en) 1989-03-09
BR8407101A (en) 1985-08-27
DE3335928A1 (en) 1985-04-18

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