EP0340426A2 - Automatic punching machine for punching container caps from sheet-metal plates - Google Patents

Automatic punching machine for punching container caps from sheet-metal plates Download PDF

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Publication number
EP0340426A2
EP0340426A2 EP89104388A EP89104388A EP0340426A2 EP 0340426 A2 EP0340426 A2 EP 0340426A2 EP 89104388 A EP89104388 A EP 89104388A EP 89104388 A EP89104388 A EP 89104388A EP 0340426 A2 EP0340426 A2 EP 0340426A2
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EP
European Patent Office
Prior art keywords
pair
sheet
rollers
tool
rolls
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.)
Withdrawn
Application number
EP89104388A
Other languages
German (de)
French (fr)
Other versions
EP0340426A3 (en
Inventor
Hans-Jürgen Biltzinger
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.)
Karges-Hammer-Maschinen & Co KG GmbH
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Karges-Hammer-Maschinen & Co KG GmbH
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Application filed by Karges-Hammer-Maschinen & Co KG GmbH filed Critical Karges-Hammer-Maschinen & Co KG GmbH
Publication of EP0340426A2 publication Critical patent/EP0340426A2/en
Publication of EP0340426A3 publication Critical patent/EP0340426A3/en
Withdrawn legal-status Critical Current

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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
    • 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
    • B21D43/20—Storage arrangements; Piling or unpiling
    • B21D43/24—Devices for removing sheets from a stack
    • 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
    • B21D43/08—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work by rollers
    • B21D43/09—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work by rollers by one or more pairs of rollers for feeding sheet or strip material
    • 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
    • B21D43/26—Stops

Definitions

  • the invention relates to an automatic punching machine for punching out can lids from sheet metal sheets with a feed device which pushes the sheet metal sheets into the tool and transports them step by step to carry out the punching processes which occur one after the other.
  • Well-known and well-proven feeding devices consist of ratchet rails that are gradually advanced and that advance the scrolled or unscrolled sheets.
  • the feed rate is limited due to the acceleration processes to be mastered.
  • Another disadvantage is that when the format of the metal sheets is changed, the feed device must be converted in order to ensure an exact feed even in the changed metal sheet format. With the known devices, it is also not possible to perform the punching on two successive metal sheets without an idle stroke.
  • the invention has for its object to provide a punching device of the type mentioned that an exact feeding of the sheet to the tool can be achieved even at high feed speeds, a mechanical conversion of the device when changing the format is no longer necessary and the punching of successive sheets without intermediate stroke can be executed.
  • a first pair of rollers which is arranged in front of the tool in the feed direction and can be driven by a numerical drive and which rests with an upper roller on the top side and with a lower roller on the underside of the metal sheet
  • Corresponding second pair of rollers on the opposite side of the tool and by a control system by which the first pair of rollers continuously pulls the sheet from a waiting position into the tool and then immediately switches to a step-by-step drive, by means of which the step-by-step drive after a replacement predetermined transport path in the tool is switched from the first pair of rollers to the second pair of rollers and by means of which the second pair of rollers is switched to a continuous extension movement after the step-by-step drive, a subsequent sheet metal plate being drawn in by the first pair of rollers without any space up to the previous sheet metal plate , while the second pair of rollers is still advancing step-by-step and while the incremental advance is being carried out by the
  • one roller is regularly arranged in alignment with the transport plane and the other roller is pivotally or displaceably mounted so that it can form a roller gap with the stationary roller for slip-free transport of the metal sheets.
  • the arrangement of pairs of rollers on the inlet side and on the outlet side for the metal sheets makes it possible to transport the metal sheet in a controlled manner at any time, and high accelerations can also be achieved without reducing the accuracy of the positioning of the metal sheet.
  • only one pair of rollers takes over the gradual advancement of the metal sheet. If the sheet of metal protrudes into the nip of the other pair of rolls, this pair of rolls only serves to guide the sheet of metal, but not to drive it.
  • the second pair of rollers takes over the further drive, so that the first pair of rollers only takes on management functions.
  • the following sheet of metal is inserted into the tool by the first pair of rollers exactly to the extent that it connects to the leading sheet of metal, which is moved step by step by the second pair of rollers, without a space.
  • the first pair of rollers takes over the step-by-step advance of the subsequent sheet, while the second pair of rollers makes an extension movement after punching out.
  • a device for fixing a zero point position of the sheet metal plate is preferably provided before the drive of the first pair of rollers is switched on, that is to say after the sheet metal plate has been inserted into the roller gap of the first pair of rollers.
  • this device can be formed by a stop which can be moved into the transport plane and against which the metal sheet is transported before it is inserted into the tool in a controlled manner by the first pair of rollers.
  • the zero point position can also be detected by a sensor, for example a light barrier.
  • the drawing shows an automatic punching machine 1 which has a punching tool 2 for punching out can lids of any shape.
  • a magazine 4 with metal sheets 5, of which the bottom metal sheet 5 is pulled down into a transport plane 7 with suction cups 6.
  • a slide 8 which is displaceable in the transport plane 7 in the direction of the punching press 1 and back, the metal sheet 5 is pushed into the effective range of a pair of rollers 9 against a stop 10.
  • the pair of rollers consists of a lower, stationary roller 11, the upper peripheral edge of which is aligned with the transport plane 7 and the working plane for the punching tool 2.
  • a pivot lever 12 On a pivot lever 12, the pivoting movement of which is characterized by a double arrow A, there is an upper roller 13 which can be pivoted against the lower roller 11 with pressure.
  • the stop 10 can be steered out of the transport plane 7 when the roller gap formed by the two rollers 11, 12 of the roller pair 9 is closed, ie the roller pair 9 controls the movement of the metal sheet 5.
  • the lower roller 11 is connected to a numerically controlled drive 15 via a rotating belt 14.
  • the sheet metal plate 5 drawn by the suction cups 6 into the transport plane 7 is pushed against the stop 10 with the slide 8, the roller pair 9 being opened by lifting the upper roller 13.
  • the pair of rollers 9 is closed by lowering the upper roller 13.
  • the stop 10 is pivoted out of the conveying plane 7. Now the pair of rollers 9 pushes the sheet 5 under the tool 2 with the aid of the numerically controlled drive 15, so that the sheet 5 connects to the preceding sheet 5 without any space.
  • the sheet metal plate 5 is transported forward step by step to carry out further punching processes.
  • the front end of the sheet metal plate 5 enters the feed nip of the second pair of rollers 17 on the outlet side 16 of the automatic punching machine after this second pair of rollers 17 has transported the preceding sheet metal plate out of the tool in one push-out movement.
  • the drive 15 for the first pair of rollers 9 is ineffective and the drive 20 for the second pair of rollers 17 is activated.
  • the second pair of rollers 17 now takes over the further step-by-step transport of the metal sheet 5 to carry out the further punching operations, while the first pair of rollers now only performs a guiding function for the metal sheet 5 as long as the end thereof is still in the nip of the first pair of rollers 9. If the metal sheet 5 has run out of the area of the first pair of rollers 9, the stop 10 is pivoted back into the transport plane 7 and the next metal plate 5, brought into the transport plane 7 by the suction cups 6, can be pushed by the slide 8 against the stop 10. After driving the stop 10 down, the first pair of rollers 9 pulls the a new metal sheet 5 in the tool 2.

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

Abstract

In an automatic punching machine for punching container caps from sheet-metal plates (5), with a feed device which pushes sheet-metal plates (5) into the tool and transports them in steps to carry out the successive punching operations, a change in the format of the sheet-metal plates (5) does not require any mechanical adaptation of the feed device and the transport of the sheet-metal plates (5) in the region of the tool is controlled without interruption in all acceleration and retardation processes by a first pair (9) of rolls which is arranged in front of the tool (2) in the feed direction, can be driven by a numerical drive (15) and rests with an upper roll (13) on the upper side and with a lower roll (11) on the lower side of the sheet-metal plate (5), a corresponding second pair (17) of rolls on the opposite side (16) of the tool (2) and by a control device, by means of which the first pair (9) of rolls pulls the sheet-metal plates (5) continuously from a stand-by position into the tool (2) and is then switched over immediately to a stepwise drive, by means of which the stepwise drive is switched over from the first pair (9) of rolls to the second pair (17) of rolls after a predetermined transport path has been travelled in the tool (2), and by means of which the second pair (17) of rolls is switched over to a continuous delivery motion after the stepwise driving, a subsequent sheet-metal plate (5) being pulled in by the first pair (9) of rolls as far as the preceding sheet-metal plate (5) without a gap, while the second pair (17) of rolls is still feeding stepwise, and the second pair (17) of rolls performing the delivery motion during the stepwise feeding by the first pair (9) of rolls. <IMAGE>

Description

Die Erfindung betrifft einen Stanzautomaten zum Ausstanzen von Dosendeckeln aus Blechtafeln mit einer Zuführungseinrichtung, die die Blechtafeln in das Werkzeug schiebt und schrittweise zur Durchführung der zeitlich nacheinander ablaufenden Stanzvorgänge transportiert.The invention relates to an automatic punching machine for punching out can lids from sheet metal sheets with a feed device which pushes the sheet metal sheets into the tool and transports them step by step to carry out the punching processes which occur one after the other.

Derartige Stanzautomaten sind seit vielen Jahren bekannt. An die Zuführungseinrichtung werden erhebliche Anforderungen bezüglich der Genauigkeit der Zuführung der Blechtafel zum Werkzeug gestellt. Der Grund dafür liegt in einer gewünschten optimalen Ausnutzung des Blechmaterials, also in dem Wunsch, möglichst wenig Abfall zu produzieren. Dieses Bestreben führt dazu, daß die zwischen den ausgestanzten Blechtafeln verbleibenden Stege der Blechtafel in einem sehr geringe Dicke vorgesehen werden. Unge­nauigkeiten in der Zuführung in der Größenordnung eines Milli­meters können dazu führen, daß ein Stanzvorgang in einen Bereich der Blechtafel hineinführt, der durch einen vorhergehenden Stanz­vorgang bereits ausgestanzt worden ist. In diesem Fall werden keine vollständigen Dosendeckel mehr ausgestanzt, das Ergebnis ist daher unbrauchbar.Such automatic punching presses have been known for many years. Considerable demands are placed on the feeding device with regard to the accuracy of feeding the sheet metal sheet to the tool. The reason for this lies in the desired optimal utilization of the sheet metal material, i.e. in the desire to produce as little waste as possible. This endeavor means that the webs of the metal sheet remaining between the punched-out metal sheets are provided in a very small thickness. Inaccuracies in the feed of the order of a millimeter can lead to a punching process leading into an area of the metal sheet that has already been punched out by a previous punching process. In this case, complete can lids are no longer punched out, and the result is therefore unusable.

Bekannte und seit Jahren bewährte Zuführungseinrichtungen beste­ hen aus schrittweise vorgeschobenen Klinkenschienen, die die gescrollten oder nicht gescrollten Bleche schrittweise vorschie­ben.Well-known and well-proven feeding devices They consist of ratchet rails that are gradually advanced and that advance the scrolled or unscrolled sheets.

Der Vorschubgeschwindigkeit sind dabei aufgrund der zu beherr­schenden Beschleunigungsvorgänge Grenzen gesetzt. Ein weiterer Nachteil besteht darin, daß bei einer Formatänderung der Blech­tafeln die Zuführungsvorrichtung umgerüstet werden muß, um einen exakten Vorschub auch im geänderten Blechtafelformat sicherzu­stellen. Mit den bekannten Vorrichtungen ist es darüber hinaus nicht möglich, die Stanzung an zwei aneinanderfolgenden Blech­tafeln ohne Leerhub auszuführen.The feed rate is limited due to the acceleration processes to be mastered. Another disadvantage is that when the format of the metal sheets is changed, the feed device must be converted in order to ensure an exact feed even in the changed metal sheet format. With the known devices, it is also not possible to perform the punching on two successive metal sheets without an idle stroke.

Der Erfindung liegt die Aufgabe zugrunde, eine Stanzvorrichtung der eingangs erwähnten Art zu auszubilden, daß eine exakte Zu­führung der Blechtafel zu dem Werkzeug auch bei hohen Zuführungs­geschwindigkeiten erreichbar ist, eine mechanische Umrüstung der Vorrichtung bei Formatänderung nicht mehr erforderlich ist und die Stanzung nacheinanderfolgender Blechtafeln ohne Zwischenhub ausgeführt werden kann.The invention has for its object to provide a punching device of the type mentioned that an exact feeding of the sheet to the tool can be achieved even at high feed speeds, a mechanical conversion of the device when changing the format is no longer necessary and the punching of successive sheets without intermediate stroke can be executed.

Diese Aufgabe wird erfindungsgemäß bei einem Stanzautomaten der eingangs erwähnten Art gelöst durch ein in Zuführungsrichtung vor dem Werkzeug angeordnetes, durch einen numerischen Antrieb antreibbares ersten Walzenpaar, das mit einer oberen Walze an der Oberseite und mit einer unteren Walze an der Unterseite der Blechtafel anliegt, ein entsprechendes zweites Walzenpaar auf der gegenüberliegenden Seite des Werkzeugs und durch eine Steuerung, durch die das erste Walzenpaar die Blechtafel aus einer Warteposition kontinuierlich in das Werkzeug zieht und anschließend sofort auf einen schrittweisen Antrieb umgeschaltet wird, durch die der schrittweise Antrieb nach Zurücklegen eines vorbestimmten Transportweges in dem Werkzeug von dem ersten Walzenpaar auf das zweite Walzenpaar umgeschaltet wird und durch die das zweite Walzenpaar nach dem schrittweisen Antrieb auf eine kontinuierliche Ausschubbewegung umgeschaltet wird, wobei das Einziehen einer nachfolgenden Blechtafel durch das erste Walzenpaar ohne Zwischenraum bis an die vorhergehende Blech­tafel erfolgt, während das zweite Walzenpaar noch schrittweise vorschiebt und während des schrittweisen Vorschubs durch das erste Walzenpaar das zweite Walzenpaar die Ausschubbewegung vornimmt.This object is achieved according to the invention in an automatic punching machine of the type mentioned at the outset by a first pair of rollers which is arranged in front of the tool in the feed direction and can be driven by a numerical drive and which rests with an upper roller on the top side and with a lower roller on the underside of the metal sheet Corresponding second pair of rollers on the opposite side of the tool and by a control system by which the first pair of rollers continuously pulls the sheet from a waiting position into the tool and then immediately switches to a step-by-step drive, by means of which the step-by-step drive after a replacement predetermined transport path in the tool is switched from the first pair of rollers to the second pair of rollers and by means of which the second pair of rollers is switched to a continuous extension movement after the step-by-step drive, a subsequent sheet metal plate being drawn in by the first pair of rollers without any space up to the previous sheet metal plate , while the second pair of rollers is still advancing step-by-step and while the incremental advance is being carried out by the first pair of rollers, the second pair of rollers is carrying out the extension movement.

Bei der Anordnung der Walzenpaare ist regelmäßig eine Walze feststehend mit der Transportebene fluchtend angeordnet und die andere Walze ist schwenkbar oder verschiebbar gelagert, so daß sie mit der ortsfesten Walze einen Walzenspalt zum schlupffreien Transport der Blechtafeln bilden kann. Durch die Anordnung von Walzenpaaren auf der Einlaufseite und auf der Auslaufseite für die Blechtafeln ist es möglich, die Blechtafel jederzeit kontrolliert zu transportieren, wobei auch hohe Beschleunigungen realisiert werden können, ohne dadurch die Genauigkeit der Positionierung der Blechtafel zu verringern. Erfindungsgemäß übernimmt immer nur ein Walzenpaar den schrittweisen Vorschub der Blechtafel. Ragt die Blechtafel in den Walzenspalt des anderen Walzenpaares hinein, dient dieses Walzenpaar nur zur Führung der Blechtafel, nicht aber zu deren Antrieb. Sobald die Blechtafel das zweite Walzenpaar erreicht hat und von diesem sicher ergriffen worden ist, übernimmt das zweite Walzenpaar den weiteren Antrieb, so daß das erste Walzenpaar nur noch Führungsfunktionen übernimmt. Dadurch werden für die Positionierung der Blechtafel günstige Hebelverhältnisse zwischen Antrieb und Blechtafel geschaffen und es wird ferner erreicht, daß sofort, nachdem die Blechtafel den ersten Walzenspalt verlassen hat, eine nachfolgende Blechtafel in diesen Walzenspalt eingeschoben und positioniert werden kann. Hierzu wird durch das erste Walzenpaar die nachfolgende Blechtafel in das Werkzeug exakt soweit eingeschoben, daß es an die durch das zweite Walzenpaar schrittweise bewegte vorlaufende Blechtafel ohne Zwischenraum anschließt. Im folgenden übernimmt das erste Walzenpaar den schrittweisen Vorschub der nachfolgenden Blechtafel, während das zweite Walzenpaar nach dem Ausstanzen eine Ausschubbewegung vornimmt.In the arrangement of the roller pairs, one roller is regularly arranged in alignment with the transport plane and the other roller is pivotally or displaceably mounted so that it can form a roller gap with the stationary roller for slip-free transport of the metal sheets. The arrangement of pairs of rollers on the inlet side and on the outlet side for the metal sheets makes it possible to transport the metal sheet in a controlled manner at any time, and high accelerations can also be achieved without reducing the accuracy of the positioning of the metal sheet. According to the invention, only one pair of rollers takes over the gradual advancement of the metal sheet. If the sheet of metal protrudes into the nip of the other pair of rolls, this pair of rolls only serves to guide the sheet of metal, but not to drive it. As soon as the sheet of metal has reached the second pair of rollers and has been safely gripped by it, the second pair of rollers takes over the further drive, so that the first pair of rollers only takes on management functions. This creates favorable leverage between the drive and the sheet for the positioning of the sheet and it is also achieved that immediately after the sheet is the first Has left the nip, a subsequent sheet of metal can be inserted into this nip and positioned. For this purpose, the following sheet of metal is inserted into the tool by the first pair of rollers exactly to the extent that it connects to the leading sheet of metal, which is moved step by step by the second pair of rollers, without a space. In the following, the first pair of rollers takes over the step-by-step advance of the subsequent sheet, while the second pair of rollers makes an extension movement after punching out.

Vorzugsweise ist eine Einrichtung zur Fixierung einer Nullpunkt­lage der Blechtafel vor dem Einschalten des Antriebs des ersten Walzenpaares, also nach dem Einschieben der Blechtafel in den Walzenspalt des ersten Walzenpaares, vorgesehen. Diese Einrich­tung kann in einer einfachen Ausführungsform durch einen in die Transportebene einfahrbaren Anschlag gebildet werden, gegen den die Blechtafel transportiert wird, bevor sie vom ersten Walzen­paar kontrolliert in das Werkzeug eingefahren wird. In einer alternativen Ausführungsform kann die Nullpunktlage auch durch einen Sensor, beispielsweise eine Lichtschranke, erkannt werden.A device for fixing a zero point position of the sheet metal plate is preferably provided before the drive of the first pair of rollers is switched on, that is to say after the sheet metal plate has been inserted into the roller gap of the first pair of rollers. In a simple embodiment, this device can be formed by a stop which can be moved into the transport plane and against which the metal sheet is transported before it is inserted into the tool in a controlled manner by the first pair of rollers. In an alternative embodiment, the zero point position can also be detected by a sensor, for example a light barrier.

Die Erfindung soll im folgenden anhand eines in der Zeichnung dargestellten Ausführungsbeispiels näher erläutert werden, in der der Aufbau einer Zuführungsvorrichtung prinzipiell dargestellt ist.The invention will be explained in more detail below with reference to an embodiment shown in the drawing, in which the structure of a feed device is shown in principle.

Die Zeichnung läßt einen Stanzautomaten 1 erkennen, der ein Stanzwerkzeug 2 zum Ausstanzen von Dosendeckeln beliebiger Form aufweist. Auf einer Einlaßseite 3 des Stanzautomaten 1 befindet sich ein Magazin 4 mit Blechtafeln 5, von denen jeweils die unterste Blechtafel 5 mit Saugern 6 in eine Transportebene 7 heruntergezogen wird. Mit einem Schieber 8, der in der Trans­portebene 7 in Richtung auf den Stanzautomaten 1 und zurück ver­schiebbar ist, wird die Blechtafel 5 in den Wirkungsbereich eines Walzenpaares 9 gegen einen Anschlag 10 geschoben.The drawing shows an automatic punching machine 1 which has a punching tool 2 for punching out can lids of any shape. On an inlet side 3 of the punching machine 1 there is a magazine 4 with metal sheets 5, of which the bottom metal sheet 5 is pulled down into a transport plane 7 with suction cups 6. With a slide 8, which is displaceable in the transport plane 7 in the direction of the punching press 1 and back, the metal sheet 5 is pushed into the effective range of a pair of rollers 9 against a stop 10.

Das Walzenpaar besteht aus einer unteren, ortsfesten Walze 11, deren oberer Umfangsrand mit der Transportebene 7 und der Arbeitsebene für das Stanzwerkzeug 2 fluchtet. An einem Schwenk­hebel 12, dessen Schwenkbewegung durch einen Doppelpfeil A charakterisiert ist, befindet sich eine obere Walze 13, die mit Druck gegen die untere Walze 11 verschwenkbar ist. Der Anschlag 10 ist aus der Transportebene 7 heraussteuerbar, wenn der durch die beiden Walzen 11, 12 des Walzenpaares 9 gebildete Walzen­spalt geschlossen ist, das Walzenpaar 9 also die Bewegung der Blechtafel 5 kontrolliert.The pair of rollers consists of a lower, stationary roller 11, the upper peripheral edge of which is aligned with the transport plane 7 and the working plane for the punching tool 2. On a pivot lever 12, the pivoting movement of which is characterized by a double arrow A, there is an upper roller 13 which can be pivoted against the lower roller 11 with pressure. The stop 10 can be steered out of the transport plane 7 when the roller gap formed by the two rollers 11, 12 of the roller pair 9 is closed, ie the roller pair 9 controls the movement of the metal sheet 5.

Die untere Walze 11 ist über einen umlaufenden Riemen 14 mit einem numerisch gesteuerten Antrieb 15 verbunden.The lower roller 11 is connected to a numerically controlled drive 15 via a rotating belt 14.

Auf der der Einlaufseite 3 gegenüberliegenden Auslaufseite 16 des Stanzautomaten 1 ist ein analoges zweites Walzenpaar 17 mit einer verschwenkbaren oberen Walze 18 und einer ortsfesten unteren Walze 19 angeordnet. Die untere Walze 19 ist ebenfalls durch einen numerisch gesteuerten Antrieb 20 antreibbar.On the outlet side 16 of the automatic punching press 1 opposite the inlet side 3 there is an analog second pair of rollers 17 with a pivotable upper roller 18 and a stationary lower one Roller 19 arranged. The lower roller 19 can also be driven by a numerically controlled drive 20.

Die von den Saugern 6 in die Transportebene 7 gezogene Blechtafel 5 wird mit dem Schieber 8 gegen den Anschlag 10 geschoben, wobei das Walzenpaar 9 durch Anheben der oberen Walze 13 geöffnet ist. Durch Absenken der oberen Walze 13 wird das Walzenpaar 9 geschlossen. Gleichzeitig wird der Anschlag 10 aus der Förderebene 7 herausgeschwenkt. Nun schiebt das Walzenpaar 9 mit Hilfe des numerisch gesteuerten Antriebs 15 die Blechtafel 5 unter das Werkzeug 2, so daß die Blechtafel 5 ohne Zwischenraum an die vorauslaufende Blechtafel 5 anschließt. Nach Durchführung eines Stanzvorganges wird die Blechtafel 5 schrittweise zur Durchführung weiterer Stanzvorgänge vortransportiert. Dadurch gelangt das vordere Ende der Blechtafel 5 in den Einzugspalt des zweiten Walzenpaares 17 auf der Auslaufseite 16 des Stanzauto­maten, nachdem dieses zweite Walzenpaar 17 die vorauslaufende Blechtafel in einer Ausschubbewegung aus dem Werkzeug heraus­transportiert hat. Sobald das zweite Walzenpaar 17 die Blechtafel 5 sicher ergriffen hat, wird der Antrieb 15 für das erste Walzen­paar 9 unwirksam und der Antrieb 20 für das zweite Walzenpaar 17 wirksam geschaltet. Demzufolge übernimmt das zweite Walzenpaar 17 nunmehr den weiteren schrittweisen Transport der Blechtafel 5 zur Durchführung der weiteren Stanzvorgänge, währen das erste Walzen­paar nun nur noch eine Führungsfunktion für die Blechtafel 5 aus­führt, solange sich deren Ende noch in dem Walzenspalt des ersten Walzenpaares 9 befindet. Ist die Blechtafel 5 aus dem Bereich des ersten Walzenpaares 9 herausgelaufen, wird der Anschlag 10 wieder in die Transportebene 7 eingeschwenkt und es kann die nächste, durch die Sauger 6 in die Transportebene 7 geholte Blechtafel 5 vom Schieber 8 gegen den Anschlag 10 vorgeschoben werden. Nach Heruntersteuern des Anschlags 10 zieht das erste Walzenpaar 9 die neue Blechtafel 5 in das Werkzeug 2 ein.The sheet metal plate 5 drawn by the suction cups 6 into the transport plane 7 is pushed against the stop 10 with the slide 8, the roller pair 9 being opened by lifting the upper roller 13. The pair of rollers 9 is closed by lowering the upper roller 13. At the same time, the stop 10 is pivoted out of the conveying plane 7. Now the pair of rollers 9 pushes the sheet 5 under the tool 2 with the aid of the numerically controlled drive 15, so that the sheet 5 connects to the preceding sheet 5 without any space. After a punching process has been carried out, the sheet metal plate 5 is transported forward step by step to carry out further punching processes. As a result, the front end of the sheet metal plate 5 enters the feed nip of the second pair of rollers 17 on the outlet side 16 of the automatic punching machine after this second pair of rollers 17 has transported the preceding sheet metal plate out of the tool in one push-out movement. As soon as the second pair of rollers 17 has securely gripped the metal sheet 5, the drive 15 for the first pair of rollers 9 is ineffective and the drive 20 for the second pair of rollers 17 is activated. As a result, the second pair of rollers 17 now takes over the further step-by-step transport of the metal sheet 5 to carry out the further punching operations, while the first pair of rollers now only performs a guiding function for the metal sheet 5 as long as the end thereof is still in the nip of the first pair of rollers 9. If the metal sheet 5 has run out of the area of the first pair of rollers 9, the stop 10 is pivoted back into the transport plane 7 and the next metal plate 5, brought into the transport plane 7 by the suction cups 6, can be pushed by the slide 8 against the stop 10. After driving the stop 10 down, the first pair of rollers 9 pulls the a new metal sheet 5 in the tool 2.

Dadurch ist es möglich, kontinuierlich Stanzvorgänge vorzunehmen, ohne einen Leerhub beim Übergang von einer Blechtafel 5 zur anderen in Kauf nehmen zu müssen. Während des gesamten Transpor­tes der Blechtafel 5 durch den Stanzautomaten 1 wird die Blech­tafel 5 durch das erste Walzenpaar 9 oder das zweite Walzen­paar 17 sowohl beim Beschleunigen als auch beim Abbremsen voll­ständig kontrolliert, so daß aufgrund der Trägheit keine Un­genauigkeiten zu befürchten sind. Die Umsteuerung der Wirksam­keit des ersten Antriebs 15 auf den zweiten Antrieb 20 und die Größe der Vorschubschritte wird durch einen Mikrorechner kon­trolliert, der die numerisch gesteuerten Antriebe 15, 20 steuert. In den Mikrorechner sind Formatänderungen usw. einfach eingebbar. Änderungen mechanischer Einstellungen müssen in der Zuführungseinrichtung nicht vorgenommen werden, wenn ein Übergang von einem Format zu einem anderen stattfindet.This makes it possible to carry out continuous punching operations without having to accept an idle stroke when transitioning from one metal sheet 5 to another. During the entire transport of the metal sheet 5 through the punching press 1, the metal sheet 5 is completely controlled by the first pair of rollers 9 or the second pair of rollers 17, both when accelerating and when braking, so that no inaccuracies are to be feared due to the inertia. The reversal of the effectiveness of the first drive 15 to the second drive 20 and the size of the feed steps is controlled by a microcomputer which controls the numerically controlled drives 15, 20. Format changes etc. can easily be entered in the microcomputer. Changes to mechanical settings do not have to be made in the feeder when there is a transition from one format to another.

Claims (4)

1. Stanzautomat zum Ausstanzen von Dosendeckeln aus Blech­tafeln (5) mit einer Zuführungseinrichtung, die Blech­tafeln (5) in das Werkzeug schiebt und schrittweise zur Durchführung der zeitlich nacheinander ablaufenden Stanz­vorgänge transportiert, gekennzeichnet durch ein in Zu­führungsrichtung vor dem Werkzeug (2) angeordnetes, durch einen numerischen Antrieb (15) antreibbares ersten Walzen­paar (9), das mit einer oberen Walze (13) an der Oberseite und mit einer unteren Walze (11) an der Unterseite der Blechtafel (5) anliegt, ein entsprechendes zweites Walzen­paar (17) auf der gegenüberliegenden Seite (16) des Werk­zeugs (2) und durch eine Steuerung, durch die das erste Walzenpaar (9) die Blechtafel (5) aus einer Warteposition kontinuierlich in das Werkzeug (2) zieht und anschließend sofort auf einen schrittweisen Antrieb umgeschaltet wird, durch die der schrittweise Antrieb nach Zurücklegen eines vorbestimmten Transportweges in dem Werkzeug (2) von dem ersten Walzenpaar (9) auf das zweite Walzenpaar (17) um­geschaltet wird und durch die das zweite Walzenpaar (17) nach dem schrittweisen Antrieb auf eine kontinuierliche Ausschubbewegung umgeschaltet wird, wobei das Einziehen einer nachfolgenden Blechtafel (5) durch das erste Walzen­paar (9) ohne Zwischenraum bis an die vorhergehende Blech­tafel (5) erfolgt, während das zweite Walzenpaar (17) noch schrittweise vorschiebt und während des schrittweisen Vorschubs durch das erste Walzenpaar (9) das zweite Walzenpaar (17) die Ausschubbewegung vornimmt.1. punching machine for punching out can lids from metal sheets (5) with a feed device that pushes metal sheets (5) into the tool and transports them step by step to carry out the successive punching operations, characterized by a arranged in front of the tool (2) in the feed direction a numerical drive (15) drivable first roller pair (9), which rests with an upper roller (13) on the top and with a lower roller (11) on the underside of the metal sheet (5), a corresponding second roller pair (17) the opposite side (16) of the tool (2) and by a control by means of which the first pair of rollers (9) continuously pulls the sheet (5) into the tool (2) from a waiting position and then immediately switches over to a step-by-step drive, through which the step-by-step drive after covering a predetermined transport path in the tool (2) from the first pair of rollers (9) to the second Roller pair (17) is switched and by which the second pair of rollers (17) is switched to a continuous extension movement after the stepwise drive, the retraction a subsequent sheet (5) through the first pair of rollers (9) without space to the previous sheet (5), while the second pair of rollers (17) is still advancing step by step and during the gradual feed through the first pair of rollers (9) the second pair of rollers (17) makes the extension movement. 2. Stanzautomat nach Anspruch 1, gekennzeichnet durch eine Einrichtung zur Fixierung einer Nullpunktlage der Blech­tafel (5) vor dem Einschalten des Antriebs des ersten Walzenpaars (9).2. Punching press according to claim 1, characterized by a device for fixing a zero point position of the sheet (5) before switching on the drive of the first pair of rollers (9). 3. Stanzautomat nach Anspruch 2, dadurch gekennzeichnet, daß die Einrichtung zur Fixierung der Nullpunktlage ein in die Transportebene (7) einfahrbarer Anschlag (10) ist, gegen den die Blechtafel (5) transportiert wird.3. Automatic punching machine according to claim 2, characterized in that the device for fixing the zero point position is a stop (10) which can be moved into the transport plane (7) and against which the metal sheet (5) is transported. 4. Stanzautomat nach Anspruch 2, dadurch gekennzeichnet, daß die Einrichtung zur Fixierung der Nullpunktlage durch einen Sensor für die Vorderkante der Blechtafel (5) gebildet ist.4. Automatic punching machine according to claim 2, characterized in that the device for fixing the zero point position is formed by a sensor for the front edge of the metal sheet (5).
EP89104388A 1988-05-04 1989-03-13 Automatic punching machine for punching container caps from sheet-metal plates Withdrawn EP0340426A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3815609 1988-05-04
DE3815609 1988-05-04

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EP0340426A2 true EP0340426A2 (en) 1989-11-08
EP0340426A3 EP0340426A3 (en) 1990-05-23

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EP (1) EP0340426A3 (en)
DD (1) DD283782A5 (en)

Cited By (5)

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Publication number Priority date Publication date Assignee Title
DE102006014454B3 (en) * 2006-03-29 2007-11-08 Hoffmann, Frank Punching device with feeding device
CN100509371C (en) * 2007-02-05 2009-07-08 山东丽鹏股份有限公司 Full-automatic punch with theftproof aluminium cover
CN111036724A (en) * 2019-12-25 2020-04-21 青岛靓塔钢结构有限公司 Feeding device for bending machine
CN112207199A (en) * 2020-09-15 2021-01-12 山东环球印铁制罐有限公司 Food packaging can metal lid stamping forming device
CN115488224A (en) * 2022-11-17 2022-12-20 盐城市日盛机械有限公司 Block terminal processing equipment

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Publication number Priority date Publication date Assignee Title
DE4345348C2 (en) * 1993-03-24 1997-01-30 Blechbearbeitungsmaschinenwerk Switching device of the separating device to other sheet metal strip formats

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US4436007A (en) * 1981-03-30 1984-03-13 The Boeing Company Automated feed for a punch press and method of using same
DD219400A1 (en) * 1983-11-30 1985-03-06 Ammendorf Waggonbau FEEDING DEVICE FOR STRIP MATERIAL FEEDING AND FEEDING, ESPECIALLY ON LEAD MACHINING MACHINES

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US4436007A (en) * 1981-03-30 1984-03-13 The Boeing Company Automated feed for a punch press and method of using same
DD219400A1 (en) * 1983-11-30 1985-03-06 Ammendorf Waggonbau FEEDING DEVICE FOR STRIP MATERIAL FEEDING AND FEEDING, ESPECIALLY ON LEAD MACHINING MACHINES

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006014454B3 (en) * 2006-03-29 2007-11-08 Hoffmann, Frank Punching device with feeding device
CN100509371C (en) * 2007-02-05 2009-07-08 山东丽鹏股份有限公司 Full-automatic punch with theftproof aluminium cover
CN111036724A (en) * 2019-12-25 2020-04-21 青岛靓塔钢结构有限公司 Feeding device for bending machine
CN112207199A (en) * 2020-09-15 2021-01-12 山东环球印铁制罐有限公司 Food packaging can metal lid stamping forming device
CN112207199B (en) * 2020-09-15 2022-08-05 山东环球印铁制罐有限公司 Food packaging can metal lid stamping forming device
CN115488224A (en) * 2022-11-17 2022-12-20 盐城市日盛机械有限公司 Block terminal processing equipment

Also Published As

Publication number Publication date
DD283782A5 (en) 1990-10-24
EP0340426A3 (en) 1990-05-23

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