EP0140189B1 - 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
EP0140189B1
EP0140189B1 EP84111739A EP84111739A EP0140189B1 EP 0140189 B1 EP0140189 B1 EP 0140189B1 EP 84111739 A EP84111739 A EP 84111739A EP 84111739 A EP84111739 A EP 84111739A EP 0140189 B1 EP0140189 B1 EP 0140189B1
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EP
European Patent Office
Prior art keywords
sheet
metal blanks
intermediate deposit
transfer
deposit station
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.)
Expired
Application number
EP84111739A
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German (de)
French (fr)
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EP0140189A1 (en
Inventor
Hans Braun
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L Schuler GmbH
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L Schuler GmbH
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Publication of EP0140189A1 publication Critical patent/EP0140189A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
    • B21D43/02—Advancing work in relation to the stroke of the die or tool
    • B21D43/04—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work
    • B21D43/05—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work specially adapted for multi-stage presses
    • B21D43/057—Devices for exchanging transfer bars or grippers; Idle stages, e.g. exchangeable

Definitions

  • the invention relates to a device of the type specified in the preamble of claim 1.
  • DE-A-29 00 526 describes a feed 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 movement of the transfer rails toward one another for alignment of the sheet metal blanks transversely to the direction of the press pass.
  • the device according to the invention advantageously detects the sheet metal blanks before they are placed in the drawing tool at the same time as the shaped workpieces move in the individual machining stages.
  • the sheet metal blanks can be removed by means of a unstacking device via z. B. brought a roller conveyor to transport level and held in this. When the transport height is reached, 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 advantageous suspension of the gripping devices by means of the device according to claim 6 ensures a high level of accuracy with good accessibility to the gripping devices.
  • the multi-stage 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. No further bearings or sliding and guiding means are shown for the transfer rails 7, 8.
  • the vertical rod 9, the adjusting head 11 and the transverse rods 12 indicate the possibility of adjusting the transfer rails in the opening-closing direction 50, a movement of the transfer rails 7, 8 away from or towards one another.
  • 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 pick up 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 available here, up to the area of the first intermediate storage station 17, and here they have 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.
  • the existing sheet metal blank 29 can be grasped by means of active gripping tools 14, as described in DE-B-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 corresponding stops attached to the gripping tools 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 gripping device 13 which is attached to the top of the transfer rail 7 and 8, respectively.
  • a passive gripping device 13 which is attached to the top 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 passive gripping device 13 is adjustable for the purpose of setting up by releasing the clamping piece 39 in the direction of the press run and transversely thereto.
  • the transverse slide 36 has an elongated hole 37.
  • the extension of the cross slide 36 forms 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 device for receiving a gripping member.
  • 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 pin 45 projects beyond the cylinder pin 46 by an amount that is equal to or greater than the thickest sheet thickness to be processed, for example of a trapezoidal sheet metal blank 28.
  • the broken line in FIG. 3 indicates on the area of a trapezoidal sheet metal blank to be gripped by the gripping device 13.
  • the infeed 50 of the gripping tools 13 against the blank 28 takes place in the lowered position 51 (FIG. 2) of the transfer rails 7, 8, initially only the shaped piece 45 coming into 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)

Description

Die Erfindung betrifft eine Einrichtung der im Oberbegriff des Anspruchs 1 angegebenen Art.The invention relates to a device of the type specified in the preamble of claim 1.

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 des Nutzens der Presse verringert. Darüber hinaus wird bei Mehrstufenpressen und insbesondere in solchen Pressen für Großteile als erste 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. Control errors, such as B. the double feed of sheet metal blanks, lead to a timely shutdown of the press or, if additional effort is required in the feed, to ejection of the sheet metal blanks already in the feed area without press shutdown. For cost reasons, however, the additional effort is reduced to the detriment of the benefits of the press. In addition, in multi-stage presses and in particular in such presses for large parts, a drawing stage is provided as 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-A-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 dem Ziehwerkzeug nicht aus, und es ist nicht sichergestellt, daß die vorgegebene Orientierung auf dem Transportweg zur Ziehstufe erhalten bleibt.DE-A-29 00 526 describes a feed 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 Bewegung der Transferschienen aufeinander zu 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 movement of the transfer rails toward one another for alignment of the sheet metal blanks transversely to the direction of the press pass.

Die Aufgabe ist bei Einrichtungen der gattungsgemäßen Art gelöst durch die im Kennzeichen des Anspruchs 1 angegebenen Merkmale.The object is achieved in devices of the generic type by the features specified in the characterizing part of claim 1.

Durch die Einrichtung nach der Erfindung werden in vorteilhafter Weise die Blechzuschnitte erfaßt, bevor diese zugleich mit der Bewegung der geformten Werkstücke in den einzelnen Bearbeitungsstufen in das Ziehwerkzeug abgelegt werden.The device according to the invention advantageously detects the sheet metal blanks before they are placed in the drawing tool at the same time as the shaped workpieces move 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 removed by means of a unstacking device via z. B. brought a roller conveyor to transport level and held in this. 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 7 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 characteristics of claims 2 to 7, 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 dem Anspruch 6 gewährleistet eine große Genauigkeitskonstanz bei guter Zugänglichkeit zu den Greifzeugen.The advantageous suspension of the gripping devices by means of the device according to claim 6 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 Zuführeinrichtung 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 Mehrstufenpresse 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, einer Bewegung der Transferschienen 7, 8 voneinander weg bzw. aufeinander zu, 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-B-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 ankommende 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 Greifzeugen 13 angebrachter Anschläge. Diese Anschläge werden durch Formstücke 45, 46 gebildet, wie sie im einzelnen in den Fig. 2 und 3 beschrieben werden.The multi-stage 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. No further bearings or sliding and guiding means are shown for the transfer rails 7, 8. The vertical rod 9, the adjusting head 11 and the transverse rods 12 indicate the possibility of adjusting the transfer rails in the opening-closing direction 50, a movement of the transfer rails 7, 8 away from or towards one another. 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 pick up 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 available here, up to the area of the first intermediate storage station 17, and here they have 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 grasped by means of active gripping tools 14, as described in DE-B-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. In order to avoid sagging of the sheet metal blank 28 during the transport from the intermediate storage station 17 into the intermediate storage 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 corresponding stops attached to the gripping tools 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 ein passives Greifzeug 13, das an der Oberseite 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 passive Greifzeug 13 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 bildet ein oder mehrere Tragarme 40, an die über Konsolbleche 43 Winkelbleche 41 angeschlossen sind. Im Ausführungsbeispiel sind an der Feststellvorrichtung zwei Tragarme 40 angeschlossen zur Aufnahme eines Greiforganes. Es können in Abhängigkeit von dem Blechzuschnitt 28 (Fig. 1) weitere Greiforgane an der Feststellvorrichtung 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 gripping device 13 which is attached to the top 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 passive gripping device 13 is adjustable for the purpose of setting up by releasing the clamping piece 39 in the direction of the press run and transversely thereto. For the transverse adjustability, the transverse slide 36 has an elongated hole 37. The extension of the cross slide 36 forms 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 device for receiving a gripping member. Depending on the sheet metal blank 28 (FIG. 1), further gripping members can be arranged on the locking device. 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 Zylinderbolzen 45 überragt den Zylinderbolzen 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 13 zu erfassenden Bereich eines trapezförmigen Blechzuschnittes. Die Zustellung 50 der Greifzeuge 13 gegen den Zuschnitt 28 erfolgt in abgesenkter Stellung 51 (Fig. 2) der Transferschienen 7, 8, wobei zunächst nur das Formstück 45 zur Anlage an dem Blechzuschnitt 28 kommt. 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 pin 45 projects beyond the cylinder pin 46 by an amount that is equal to or greater than the thickest sheet thickness to be processed, for example of a trapezoidal sheet metal blank 28. The broken line in FIG. 3 indicates on the area of a trapezoidal sheet metal blank to be gripped by the gripping device 13. The infeed 50 of the gripping tools 13 against the blank 28 takes place in the lowered position 51 (FIG. 2) of the transfer rails 7, 8, initially only the shaped piece 45 coming into 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 (7)

1. Apparatus for feeding sheet-metal blanks (28, 29) to the first processing stage (6) of a multi-stage press (1),
having means (26, 27) for removing the sheet-metal blanks (28) from a supply stack (22),
having means (23, 24, 26, 27)
for transporting the sheet-metal blanks (28) from the supply stack (22) up to an intermediate deposit station (18) and
for depositing the sheet-metal blanks (28) in the intermediate deposit station (18),
having transfer rails (7, 8)
which, in the working cycle of the multi-stage press (1), can be driven
in a transfer direction (49),
in a lifting and lowering direction (51), and
in a direction (50) towards one another and away from one another, and
having gripping appliances (13,14,16) attached to the transfer rails (7, 8)
for removing the sheet-metal blanks (28) from the intermediate deposit station (18),
for transporting the sheet-metal blanks (28) into the first and further processing stages (4, 6), and
for depositing the sheet-metal blanks (28) in the processing stages (4, 6),

characterized in that
two intermediate deposit stations (17, 18) are provided in front of the first processing stage (6),
of which the first intermediate deposit station (17) nearest the supply stack (22) is designed as an alignment station for the sheet-metal blanks (28) with respect to the first processing stage (6),
the first intermediate deposit station (17) having not only movable, spring-loaded stops (19),
against which each sheet-metal blank (28) can first be guided during movement in the direction (49) of the passage through the press, but also
fixed stops (21),
against, which each sheet-metal blank (28) can be moved back under spring force from the movable stops (19) for the alignment in the direction (49) of the passage through the press, and in that
the transfer rails (7, 8)
extend into the area of the first intermediate deposit station (17),
have passive gripping appliances (13) in the area of the first intermediate deposit station (17)
for aligning the sheet-metal blanks (28) in the direction (50) towards one another during the movement of the transfer rails (7, 8),
for supporting the sheet-metal blanks (28) from below during transporting, and
for depositing the sheet-metal blanks (28) in the second intermediate deposit station (18), and
active gripping appliances (14)
to firmly grip the sheet-metal blanks (28)
for removing them from the second intermediate deposit station (18),
for transporting the sheet-metal blanks (28) into the first processing stage (6) and
for depositing them in the latter.
2. Apparatus according to Claim 1, characterized in that the passive gripping appliances (13), to align the sheet-metal blanks (28) next to one bearing surface (42) each, also have shaped pieces (45, 46) like stops for the sheet-metal blanks (28) to bear against in the transfer direction (49) and for the sheet-metal blanks (28) to bear against during the movement (50) of the transfer rails (7, 8) towards one another.
3. Apparatus according to Claim 2, characterized in that the shaped pieces (45, 46) are cylindrically round pins which are let into the bearing surface (42) and are mounted via mounting blocks (44) on an angle plate (41) placed onto the bearing surface (42).
4. Apparatus according to Claims 2 and 3, characterized in that the shaped pieces (45, 46) have shaped bevels (47) for the sheet-metal blanks (28) to run into the passive gripping appliances (13).
5. Apparatus according to Claims 2 and 3, characterized in that the shaped pieces (45) for the transverse alignment of the sheet-metal blanks (28) during a movement (50) of the transfer rails (7. 8) towards one another protrude beyond the shaped pieces (46) for the longitudinal alignment.
6. Apparatus according to Claim 1, characterized in that the passive gripping appliances (13), via a locking device (32 to 39), are attached to the transfer rails (7, 8) in such a way that they can be adjusted and fixed in the transfer direction (49) and in a direction (50) at right angles hereto, the locking device having for this purpose at least one running rail (32), which is fixed to the transfer rails (7, 8) and extends in the direction of the longitudinal extent of the transfer rail (7, 8), a carriage (34) displaceably mounted in this running rail (32), a cross slide (36), which is orientated at right angles to. the running rail (32), is movably mounted on the carriage (34) at right angles to the running rail (32) and serves to accommodate passive gripping appliances (13), and clamping means (33, 39) for jointly arresting the cross slide (36) and carriage (34) on the running rail (32).
7. Apparatus according to Claim 1, characterized in that retaining means (52) which can be aligned in accordance with the shape of the sheet-metal blank (29) are attached in the area of the second intermediate deposit station (8) essentially at the transporting level.
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
DE19833335928 DE3335928A1 (en) 1983-10-04 1983-10-04 DEVICE FOR FEEDING SHEET CUTS TO THE LEVEL OF A MULTI-STAGE PRESS
DE3335928 1983-10-04

Publications (2)

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

Family

ID=6210852

Family Applications (1)

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

Country Status (6)

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

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4001591A1 (en) * 1989-02-15 1990-08-16 Mueller Weingarten Maschf TRANSPORT DEVICE FOR PRESSED PARTS IN A LARGE-PARTED PRESS
DE4001590A1 (en) * 1989-02-15 1990-08-16 Mueller Weingarten Maschf Multi-stage press for pressing large workpieces - has work-table to receive workpiece between work stations
DD282189A5 (en) * 1989-03-13 1990-09-05 Warnke Umformtech Veb K DEVICE FOR RECEIVING PLATINES IN EMPTY LEVELS IN THE SIDE STAND OF A TRANSFER PRESS
US5452981A (en) * 1991-03-06 1995-09-26 Leland D. Blatt Automatic tool changer
DE4313416A1 (en) * 1993-04-23 1994-10-27 Mueller Weingarten Maschf Device for transporting parts in a step press
DE19542205A1 (en) * 1995-11-13 1997-05-15 Schuler Pressen Gmbh & Co Press with combined transfer device
US6116845A (en) * 1998-03-19 2000-09-12 Atlas Technologies, Inc. Apparatus for supporting a workpiece for transfer
US5899109A (en) * 1998-03-23 1999-05-04 Rapindex Incorporated Indexing conveyor for a die transfer system and method
WO2000041848A1 (en) 1999-01-11 2000-07-20 Amada Company, Limited Sheet working system
US6134939A (en) * 1999-07-02 2000-10-24 Hms Products Toolless quick release of transfer bar
KR101006449B1 (en) * 2004-04-08 2011-01-06 삼성전자주식회사 Distribution system for manufacturing liquid crystal display
WO2006128393A1 (en) * 2005-06-03 2006-12-07 Müller Weingarten AG Blank feeder
US11014216B2 (en) 2017-10-27 2021-05-25 Aida Engineering, Ltd. Workpiece holding tool changing system for a workpiece conveying apparatus of a transfer press machine

Family Cites Families (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2484845A (en) * 1945-05-24 1949-10-18 American Can Co Sheet treating machine
US3001787A (en) * 1958-12-17 1961-09-26 American Can Co Slitting machine
DE1552003A1 (en) * 1966-04-16 1970-01-08 Karlsruhe Augsburg Iweka Transfer press with twin tools and zigzag punch
DE1973346U (en) * 1967-07-18 1967-11-23 August Wickersheim K G DEVICE FOR FEEDING PACKAGED GOODS, IN PARTICULAR STACKS OF MAGAZINES, NEWSPAPERS AND THE LIKE, TO PACKAGING EQUIPMENT.
US3456814A (en) * 1967-10-16 1969-07-22 Verson Allsteel Press Co Transfer assembly for presses
US3939992A (en) * 1974-09-26 1976-02-24 Mikulec Richard A Workpiece transfer mechanism
FR2288069A1 (en) * 1974-10-15 1976-05-14 Saint Gobain DEVICE FOR COATING THE FOUR AREAS OF A MULTIPLE GLAZING WITH A PLASTIC MASTIC
DE2455937C2 (en) * 1974-11-27 1985-03-14 L. Schuler GmbH, 7320 Göppingen Device for cutting sheet metal strip material to length and stacking cut sheet metal sections
JPS5219375A (en) * 1975-08-06 1977-02-14 Ishikawajima Harima Heavy Ind Co Ltd Blank feed device in transfer press
JPS5857338B2 (en) * 1976-08-04 1983-12-20 株式会社神崎高級工機製作所 Side clutch device for traveling work vehicles, etc.
GB1596777A (en) * 1977-04-12 1981-08-26 Lucas Industries Ltd Method of locating a board on a support
DE2746048C3 (en) * 1977-10-13 1980-11-06 Maschinenfabrik Weingarten Ag, 7987 Weingarten Device for feeding blanks into the tool room of a press and for removing punched workpieces and the lead frame from the tool room
US4160372A (en) * 1977-11-28 1979-07-10 The Minster Machine Company Transfer press having quick change die sets
JPS5813842B2 (en) * 1978-03-10 1983-03-16 株式会社東芝 thickness measuring device
DE2900526C2 (en) * 1978-07-15 1991-02-14 Aida Engineering, Ltd., Sagamihara, Kanagawa Quick tool change device for a transfer press
JPS5514227A (en) * 1978-07-15 1980-01-31 Aida Eng Ltd Transfer press
US4311304A (en) * 1978-09-29 1982-01-19 Fuji Photo Film Co., Ltd. Presensitized plate handling device
JPS609191B2 (en) * 1979-06-18 1985-03-08 株式会社ナカ技術研究所 Underfloor storage device
US4404837A (en) * 1979-07-11 1983-09-20 American Can Company Press transfer bar
JPS6313870Y2 (en) * 1981-05-26 1988-04-19
JPS58202218A (en) * 1982-05-17 1983-11-25 Komatsu Ltd Device for automatically loading press-molded article
DE3220861A1 (en) * 1982-06-03 1984-02-02 Hoechst Ag, 6230 Frankfurt POSITIONING DEVICE
US4524601A (en) * 1983-05-13 1985-06-25 Bernardi Carl E Automatic apparatus for downsetting lead frame strips
US4547115A (en) * 1984-01-25 1985-10-15 Charbonnet Carl D Apparatus for transporting and aligning panel-like members

Also Published As

Publication number Publication date
JPS61500013A (en) 1986-01-09
BR8407101A (en) 1985-08-27
EP0140189A1 (en) 1985-05-08
WO1985001459A1 (en) 1985-04-11
JPH0653298B2 (en) 1994-07-20
US4753103A (en) 1988-06-28
DE3335928A1 (en) 1985-04-18
DE3476525D1 (en) 1989-03-09

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