EP0487456A1 - Method and device for advancing a band or a strip, in particular for cutting blanks - Google Patents

Method and device for advancing a band or a strip, in particular for cutting blanks Download PDF

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Publication number
EP0487456A1
EP0487456A1 EP91810894A EP91810894A EP0487456A1 EP 0487456 A1 EP0487456 A1 EP 0487456A1 EP 91810894 A EP91810894 A EP 91810894A EP 91810894 A EP91810894 A EP 91810894A EP 0487456 A1 EP0487456 A1 EP 0487456A1
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EP
European Patent Office
Prior art keywords
grippers
band
belt
drive
feed
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.)
Granted
Application number
EP91810894A
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German (de)
French (fr)
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EP0487456B1 (en
Inventor
Hans Jöhr
Roland Krebs
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Adval Tech Holding AG
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Styner and Bienz AG
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Publication of EP0487456A1 publication Critical patent/EP0487456A1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • 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
    • B21D43/10—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work by grippers
    • B21D43/11—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work by grippers for feeding sheet or strip material
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/04—Processes
    • Y10T83/0524—Plural cutting steps
    • Y10T83/0577—Repetitive blanking
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/444—Tool engages work during dwell of intermittent workfeed
    • Y10T83/463—Work-feed element contacts and moves with work
    • Y10T83/4632—Comprises a work-moving gripper

Definitions

  • a strip or strip is to be advanced step by step. If a row of blanks is to be cut out of a strip, the feed takes place gradually in the longitudinal direction of the strip. However, if at least two rows of blanks are cut out in the longitudinal and transverse directions for better utilization of the strip, the strip must be advanced in a zigzag or sawtooth manner.
  • the feed is carried out by means of a gripper which, in the simplest case, advances the belt step by step in its longitudinal direction.
  • This gripper must reverse between successive cutting operations, grasp the tape and advance the tape. So he has to double the feed path and still have to change the direction of movement.
  • a combined longitudinal and transverse feed is required, which leads to structurally complex solutions that also do not allow a higher working speed.
  • the aim of the present invention is to enable, with the help of alternately effective grippers, a conveyance with very high number of steps with a simple structure and simple control.
  • This goal is achieved according to the method according to claim 1 or the feed device according to claim 5.
  • the movement can be diverted from the drive to the grippers by any angle up to 90 ° using sliding coupling elements or swiveling linkages.
  • the conveying can take place in a straight line in the longitudinal direction of the belt if only a row of blanks is cut out, or the conveying can take place in a zigzag manner by moving both grippers in a direction which is inclined to the longitudinal direction of the belt or is perpendicular to the same.
  • a zigzag line 2 indicates the manner in which the belt is to be conveyed in order to punch blanks in two rows at locations offset in the longitudinal and transverse directions and thus to achieve optimal use of the material.
  • This zigzag-like conveying of the belt is now achieved by means of two similar grippers 3 and 4. These grippers are designed as elongated slides, which are guided along guide rails 6 by means of U-guides 5, which are attached to the machine frame as indicated in FIGS. 2 and 3 are.
  • the two grippers 3 and 4 can thus be moved along the guide rails 6 in a direction which is inclined to the longitudinal direction of the belt 1, specifically in the specific case by 60 °, such that the two oppositely inclined guide rails 6 or directions of movement of the grippers 3 and 4 also enclose an angle of 60 °.
  • the two grippers each have an air cushion 7, to which compressed air can be supplied in pulses via flexible lines 8 in order to clamp a clamping rail 9 against the belt 1 passing between the clamping rail 9 and the bottom 10 of the gripper for the purpose of conveying.
  • the clamping rails 9 are guided vertically movably on guide pins 11.
  • the two grippers each have a slotted coupling sleeve 12, which sit on a coupling rod 13 and can slide along the same.
  • the coupling rod is connected to a drive frame 14 which is driven by a drive motor 15 via a spindle 16 is movable back and forth in the axial direction of the spindle 16 in order to move the grippers 4 back and forth along the guides 6 via the coupling sleeves 12.
  • the grippers 3 and 4 each have two belt guides 23.
  • the mode of operation of the conveying device shown largely results from the above description.
  • the two grippers 3 and 4 are moved back and forth synchronously by means of the drive motor 15. With each stroke of this movement, one gripper 3 or 4 is now supplied with compressed air in order to couple it by pressing the clamping rail 9 with the belt 1 and to take it along in the direction of movement of the gripper in question.
  • This situation is indicated in FIG. the clamping rail of the gripper 4 is pressed pneumatically against the belt 1, so that this must follow the movement of the gripper 4. In this way, the belt is shifted alternately in the direction of movement of the gripper 3 or in the direction of movement of the gripper 4.
  • the guides 23 attached to the grippers 3 and 4 always ensure that the belt is guided in a straight line in the region of the conveyor device, so that the belt is always fed to the cutting tool (not shown) in the correct position.
  • the drive of the grippers 3 and 4 by means of a controlled electric motor 15 permits very simple programming of the movement sequence, i.e. the movement stroke and the movement cycle as well as the respective exact period during which the belt is fed. Another, for example pneumatic, drive is also possible.
  • a second exemplary embodiment is shown schematically in FIG.
  • Two grippers 17 and 18 are provided, which are displaceable along guide rails 19 and 20 in the longitudinal direction of the belt 1.
  • the gripper 17 or the gripper 18 is coupled to the band in the manner described in order to advance the same by one step.
  • each gripper 17 or 18 is moved in one direction for advancing the band by one step, and is moved back into the starting position during the next advancement of the band.
  • a particularly high working cadence can also be achieved here, all the more since the inertial forces of the grippers 17 and 18 compensate one another.
  • a straight feed according to FIG. 4 can also be used in connection with another tool, e.g. a follow-up tool.
  • FIGS. 5 to 8 show possibilities for cutting blanks in more than two rows by means of suitable control of the stroke and the effectiveness of the grippers 3 and 4 (FIG. 1).
  • the individual strokes or the cyclical sequence of the steps in the different cutting positions are designated with letters a to f . In this way, double steps and single steps are carried out alternately in order to reach each cutting position only once. While cutting blanks in two rows according to FIG. 1, stroke rates up to 300 / min. 5 to 8 strokes up to 200 / min are achieved when cutting out in more than two rows. because double steps have to be carried out.
  • a drive unit suitable for all purposes can preferably be present, which can be detachably coupled to interchangeable feed units with grippers.
  • different types of modular feed units can be installed as required, while the same drive unit can always be provided. This is particularly possible if the drive unit can work with any strokes and stroke numbers in the manner described, thanks to electronic control.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Advancing Webs (AREA)
  • Punching Or Piercing (AREA)
  • Continuous Casting (AREA)
  • Winding, Rewinding, Material Storage Devices (AREA)

Abstract

The stepwise transport of the band (1) is performed by two grippers (3, 4) which are moved backwards and forwards synchronously, each in their longitudinal direction, by a common drive (12-16). The grippers are each coupled alternately to the band (1) during their stroke in a particular direction, in order to impart to the said band a zigzag feed motion (2). In this case, the driving frequency of the feed device is half the cadence of the following tool and very high cadences can therefore be obtained. The construction and operation of the feed device are particularly simple. <IMAGE>

Description

Zum Ausschneiden, insbesondere Ausstanzen von Rohlingen, insbesondere kreisrunder Scheiben zur Weiterverarbeitung zu Ziehteilen, ist ein Band oder Streifen schrittweise vorzuschieben. Ist aus einem Band eine Reihe von Rohlingen auszuschneiden, erfolgt der Vorschub schrittweise in Längsrichtung des Bandes. Werden jedoch zur besseren Ausnutzung des Bandes mindestens zwei Reihen von Rohlingen in Längs- und Querrichtung versetzten Stellen ausgeschnitten, muss das Band zickzackartig bzw. sägezahnartig vorgeschoben werden.For cutting out, in particular punching out blanks, in particular circular disks for further processing into drawn parts, a strip or strip is to be advanced step by step. If a row of blanks is to be cut out of a strip, the feed takes place gradually in the longitudinal direction of the strip. However, if at least two rows of blanks are cut out in the longitudinal and transverse directions for better utilization of the strip, the strip must be advanced in a zigzag or sawtooth manner.

Im allgemeinen erfolgt der Vorschub mittels eines Greifers, der im einfachsten Falle das Band in seiner Längsrichtung schrittweise vorschiebt. Dieser Greifer muss zwischen aufeinanderfolgenden Schnittoperationen eine Rücklaufbewegung ausführen, das Band erfassen und das Band vorschieben. Er muss also den doppelten Vorschubweg ausführen und erst noch die Bewegungsrichtung ändern. Im Falle eines zickzackartigen Bandvorschubes ist ein kombinierter Längs- und Quervorschub erforderlich, was zu kontruktiv aufwendigen Lösungen führt, die auch keine höhere Arbeitsgeschwindigkeit zulassen.In general, the feed is carried out by means of a gripper which, in the simplest case, advances the belt step by step in its longitudinal direction. This gripper must reverse between successive cutting operations, grasp the tape and advance the tape. So he has to double the feed path and still have to change the direction of movement. In the case of a zigzag-like belt feed, a combined longitudinal and transverse feed is required, which leads to structurally complex solutions that also do not allow a higher working speed.

Aus der EP-A-0 321 602 ist es zwar bekannt, zwei in Vorschubrichtung im Gegentakt hin- und herbewegbare Greifer von einem gemeinsamen Antriebsritzel her über Zahnstangen anzutreiben, und das Band durch wechselweises Kuppeln mit einem der Greifer bei dessen Bewegung in Vorschubrichtung schrittweise vorzuschieben. Abgesehen davon, dass diese Anordnung nur für einen Vorschub in Bandrichtung geeignet ist, erfolgt der Antrieb durch einen aufwendigen Mechanismus der keine sehr hohen Hubzahlen gestattet.From EP-A-0 321 602 it is known to drive two grippers which can be reciprocally moved in the feed direction from a common drive pinion via toothed racks, and to gradually advance the belt by alternately coupling with one of the grippers as it moves in the feed direction . Apart from the fact that this arrangement is only for a feed in Belt direction is suitable, the drive is carried out by a complex mechanism that does not allow very high stroke rates.

Ziel vorliegender Erfindung ist es, mit Hilfe wechselweise wirksamer Greifer eine Förderung mit sehr hohen Schrittzahlen bei einfachem Aufbau und einfacher Steuerung zu ermöglichen. Dieses Ziel wird gemäss dem Verfahren nach Anspruch 1 bzw. der Vorschubvorrichtung nach Anspruch 5 erreicht. Die Bewegungsumlenkung vom Antrieb zu den Greifern kann um beliebige Winkel bis zu 90° mittels gleitender Kupplungsorgane oder schwenkbarer Gestänge erfolgen. Die Förderung kann dabei geradlinig in Längsrichtung des Bandes erfolgen, wenn nur eine Reihe von Rohlingen ausgeschnitten wird, oder die Förderung kann zickzackartig erfolgen, indem beide Greifer in einer Richtung bewegt werden, die zur Längsrichtung des Bandes geneigt ist oder rechtwinklig zu derselben steht. Es ergibt sich hierbei ein besonders einfacher Aufbau und eine einfache synchrone Bewegung und Steuerung mit verhältnismässig geringen bewegten Massen, und es können dabei Schnittdakenzen bis beispielsweise 300/min. erzielt werden. Wie noch gezeigt wird, sind dabei den Bewegungsabläufen kaum Grenzen gesetzt.The aim of the present invention is to enable, with the help of alternately effective grippers, a conveyance with very high number of steps with a simple structure and simple control. This goal is achieved according to the method according to claim 1 or the feed device according to claim 5. The movement can be diverted from the drive to the grippers by any angle up to 90 ° using sliding coupling elements or swiveling linkages. The conveying can take place in a straight line in the longitudinal direction of the belt if only a row of blanks is cut out, or the conveying can take place in a zigzag manner by moving both grippers in a direction which is inclined to the longitudinal direction of the belt or is perpendicular to the same. This results in a particularly simple construction and a simple synchronous movement and control with relatively small moving masses, and cutting datences of up to, for example, 300 / min. be achieved. As will be shown, there are hardly any limits to the movements.

Die Erfindung wird nun anhand zweier, in der Zeichnung dargestellter Ausführungsbeispiele näher erläutert.

  • Fig. 1 ist eine schematische Draufsicht auf das erste Ausführungsbeispiel,
  • Fig. 2 ist ein Schnitt nach Linie II-II in Fig. 1,
  • Fig. 3 ist ein Schnitt nach Linie III-III in Fig. 1,
  • Fig. 4 ist eine schematische Draufsicht auf das zweite Ausführungsbeispiel und die Fig. 5 bis 8 zeigen Möglichkeiten zum Ausschneiden von Rohlingen in mehr als zwei Reihen.
The invention will now be explained in more detail with reference to two exemplary embodiments shown in the drawing.
  • 1 is a schematic plan view of the first embodiment,
  • Fig. 2 is a section along line II-II in Fig. 1,
  • Fig. 3 is a section along line III-III in Fig. 1,
  • Figure 4 is a schematic top view of the second Embodiment and FIGS. 5 to 8 show possibilities for cutting blanks in more than two rows.

Fig. 1 zeigt das zu fördernde Band 1, aus dem Rohlinge, beispielsweise kreisrunde Scheiben, mittels eines Schnittwerkzeugs auszuschneiden sind. In Fig. 1 ist mit einer Zickzacklinie 2 angedeutet, in welcher Weise das Band zu fördern ist, um in zwei Reihen an in Längs- und Querrichtung versetzten Stellen Rohlinge auszustanzen und damit eine optimale Nutzung des Material zu erzielen. Diese zickzackartige Förderung des Bandes wird nun erzielt mittels zweier gleichartiger Greifer 3 und 4. Diese Greifer sind als längliche Schlitten ausgebildet, welche mittels U-Führungen 5 längs Führungsschienen 6 geführt sind, welche in den Fig. 2 und 3 angedeuteter Weise auf dem Maschinengestell befestigt sind. Die beiden Greifer 3 und 4 können also längs den Führungsschienen 6 in einer Richtung bewegt werden, welche zur Längsrichtung des Bandes 1 geneigt ist und zwar im konkreten Falle um 60°, derart dass die beiden entgegengesetzt geneigten Führungschienen 6 bzw. Bewegungsrichtungen der Greifer 3 und 4 unter sich ebenfalls einen Winkel von 60° einschliessen. Die beiden Greifer weisen je ein Luftkissen 7 auf, welchem über flexible Leitungen 8 impulsweise Druckluft zugeführt werden kann, um eine Klemmschiene 9 gegen das zwischen der Klemmschiene 9 und dem Boden 10 des Greifers durchtretende Band 1 zwecks Förderung zu klemmen. Die Klemmschienen 9 sind auf Führungsbolzen 11 vertikal beweglich geführt.1 shows the belt 1 to be conveyed, from which blanks, for example circular disks, are to be cut out by means of a cutting tool. In Fig. 1, a zigzag line 2 indicates the manner in which the belt is to be conveyed in order to punch blanks in two rows at locations offset in the longitudinal and transverse directions and thus to achieve optimal use of the material. This zigzag-like conveying of the belt is now achieved by means of two similar grippers 3 and 4. These grippers are designed as elongated slides, which are guided along guide rails 6 by means of U-guides 5, which are attached to the machine frame as indicated in FIGS. 2 and 3 are. The two grippers 3 and 4 can thus be moved along the guide rails 6 in a direction which is inclined to the longitudinal direction of the belt 1, specifically in the specific case by 60 °, such that the two oppositely inclined guide rails 6 or directions of movement of the grippers 3 and 4 also enclose an angle of 60 °. The two grippers each have an air cushion 7, to which compressed air can be supplied in pulses via flexible lines 8 in order to clamp a clamping rail 9 against the belt 1 passing between the clamping rail 9 and the bottom 10 of the gripper for the purpose of conveying. The clamping rails 9 are guided vertically movably on guide pins 11.

Die beiden Greifer weisen je eine geschlitzte Kupplungsbüchse 12 auf, welche auf einer Kupplungsstange 13 sitzen und längs derselben gleiten können. Die Kupplungsstange ist verbunden mit einem Antriebsrahmen 14, welcher von einem Antriebsmotor 15 über eine Spindel 16 in Achsrichtung der Spindel 16 hin und her bewegbar ist, um die Greifer 4 über die Kupplungsbüchsen 12 längs ihren Führungen 6 hin und her zu bewegen. Die Greifer 3 und 4 weisen je zwei Bandführungen 23 auf.The two grippers each have a slotted coupling sleeve 12, which sit on a coupling rod 13 and can slide along the same. The coupling rod is connected to a drive frame 14 which is driven by a drive motor 15 via a spindle 16 is movable back and forth in the axial direction of the spindle 16 in order to move the grippers 4 back and forth along the guides 6 via the coupling sleeves 12. The grippers 3 and 4 each have two belt guides 23.

Die Arbeitsweise der dargestellten Fördervorrichtung ergibt sich schon weitgehend aus der vorstehenden Beschreibung. Mittels des Antriebsmotors 15 werden die beiden Greifer 3 und 4 synchron hin und her bewegt. Bei jedem Hub dieser Bewegung wird nun dem einen Greifer 3 oder 4 Druckluft zugeführt, um ihn durch Anpressen der Klemmschiene 9 mit dem Band 1 zu kuppeln und dasselbe in der Bewegungsrichtung des betreffenden Greifers mitzunehmen. In Figur 3 ist diese Situation angedeutet, d.h. die Klemmschiene des Greifers 4 ist pneumatisch gegen das Band 1 gepresst, so dass dieses der Bewegung des Greifers 4 folgen muss. In dieser Weise wird das Band abwechslungsweise in der Bewegungsrichtung des Greifers 3 bzw. in der Bewegungsrichtung des Greifers 4 verschoben. Die an den Greifern 3 und 4 angebrachte Führungen 23, sorgen stets für eine Geradführung des Bandes im Bereiche der Fördervorrichtung, so dass das Band auch stets in der richtigen Position dem nicht dargestellten Schnittwerkzeug zugeführt wird. Der Antrieb der Greifer 3 und 4 mittels eines gesteuerten Elektromotors 15 gestattet eine sehr einfache Programmierung des Bewegungsablaufes, d.h. des Bewegungshubes und des Bewegungstaktes sowie des jeweiligen genauen Zeitraumes, während welchem das Band vorgeschoben wird. Es ist aber auch ein anderer, beispielsweise pneumatischer Antrieb möglich.The mode of operation of the conveying device shown largely results from the above description. The two grippers 3 and 4 are moved back and forth synchronously by means of the drive motor 15. With each stroke of this movement, one gripper 3 or 4 is now supplied with compressed air in order to couple it by pressing the clamping rail 9 with the belt 1 and to take it along in the direction of movement of the gripper in question. This situation is indicated in FIG. the clamping rail of the gripper 4 is pressed pneumatically against the belt 1, so that this must follow the movement of the gripper 4. In this way, the belt is shifted alternately in the direction of movement of the gripper 3 or in the direction of movement of the gripper 4. The guides 23 attached to the grippers 3 and 4 always ensure that the belt is guided in a straight line in the region of the conveyor device, so that the belt is always fed to the cutting tool (not shown) in the correct position. The drive of the grippers 3 and 4 by means of a controlled electric motor 15 permits very simple programming of the movement sequence, i.e. the movement stroke and the movement cycle as well as the respective exact period during which the belt is fed. Another, for example pneumatic, drive is also possible.

In Fig. 4 ist schematisch ein zweites Ausführungsbeispiel dargestellt. Es sind zwei Greifer 17 und 18 vorgesehen, welche längs Führungsschienen 19 und 20 in Längsrichtung des Bandes 1 verschiebbar sind. Sie können vom Motor 15 über die Spindel 16, eine Spindelnuss 21 und Kupplungsstangen 22 im Gegentakt hin und her bewegt werden. Während des Hubes in der gewünschten Vorschubrichtung des Bandes 1 wird der Greifer 17 oder der Greifer 18 in der beschriebenen Weise mit dem Band gekuppelt, um dasselbe um einen Schritt vorzuschieben. Auch hier gilt somit wieder, dass jeder Greifer 17 oder 18 zum Vorschieben des Bandes um einen Schritt nur in einer Richtung bewegt wird, und während des nächsten Vorschub des Bandes in die Ausgangsposition zurückbewegt wird. Es kann also hier auch eine besonders hohe Arbeitskadenz erzielt werden, umso mehr als die Massenkräfte der Greifer 17 und 18 sich gegenseitig kompensieren.A second exemplary embodiment is shown schematically in FIG. Two grippers 17 and 18 are provided, which are displaceable along guide rails 19 and 20 in the longitudinal direction of the belt 1. You can from the motor 15 via the spindle 16, a spindle nut 21 and coupling rods 22 are moved back and forth in push-pull. During the stroke in the desired direction of advance of the band 1, the gripper 17 or the gripper 18 is coupled to the band in the manner described in order to advance the same by one step. Here, too, it is again the case that each gripper 17 or 18 is moved in one direction for advancing the band by one step, and is moved back into the starting position during the next advancement of the band. A particularly high working cadence can also be achieved here, all the more since the inertial forces of the grippers 17 and 18 compensate one another.

Es sind auch andere Ausführungen möglich. Bei der Ausführungsform nach den Fig. 1 bis 3 ist angenommen, die Greifer 3 und 4 seien starr mit ihren Kupplungsbüchsen 12 verbunden, d.h. der Winkel, welchen die Bewegungsrichtungen der beiden Greifern einschliessen, sei nicht veränderlich. Es wäre aber auch möglich, mindestens einen der Greifer 3 oder 4 gegenüber seiner Kupplungsbüchse 12 einstellbar anzuordnen, wobei selbstverständlich auch die zugeordnete Führungsschiene 6 entsprechend verstellbar sein müsste. In diesem Falle könnte beispielsweise einer der Greifer 3 oder 4 senkrecht zur Bandlängsrichtung gestellt werden, um dem Band eine sägezahnförmige Vorschubbewegung zu erteilen.Other designs are also possible. In the embodiment according to FIGS. 1 to 3 it is assumed that the grippers 3 and 4 are rigidly connected to their coupling bushes 12, i.e. the angle which the directions of movement of the two grippers enclose cannot be changed. However, it would also be possible to arrange at least one of the grippers 3 or 4 so as to be adjustable relative to its coupling sleeve 12, the associated guide rail 6 naturally also having to be correspondingly adjustable. In this case, for example, one of the grippers 3 or 4 could be placed perpendicular to the longitudinal direction of the belt in order to give the belt a sawtooth-shaped feed movement.

Während ein zick-zackartiger Bandvorschub praktisch nur im Zusammenhang mit einem Schnittwerkzeug zum Ausschneiden von Rohlingen von Bedeutung ist, kann ein gerader Vorschub gemäss Fig. 4 auch im Zusammenhang mit einem anderen Werkzeug, z.B. einem Folgewerkzeug, zur Anwendung kommen.While a zigzag-like tape feed is practically only important in connection with a cutting tool for cutting blanks, a straight feed according to FIG. 4 can also be used in connection with another tool, e.g. a follow-up tool.

Es ist oben erwähnt worden, dass der Antrieb der Greifer mit einem gesteuerten Motor 15 eine vielseitige Bewegungssteuerung mittels geeigneter Software ermöglicht. Es kann dabei insbesondere der Hub der Greifer frei gewählt werden. Die Figuren 5 bis 8 zeigen Möglichkeiten, mittels geeigneter Steuerung des Hubs und der Wirksamkeit der Greifer 3 und 4 (Fig. 1) in mehr als zwei Reihen Rohlinge auszuschneiden. In diesen Figuren sind die einzelnen Hübe bzw. die zyklische Reihenfolge der Schritte in die verschiedenen Schnittpositionen mit Buchstaben a bis f bezeichnet. Es werden also abwechslungsweise Doppelschritte und Einzelschritte ausgeführt, um jede Schnittposition nur einmal zu erreichen. Während beim Ausschneiden von Rohlingen in zwei Reihen gemäss Fig. 1 Hubzahlen bis zu 300/min. möglich sind, erreicht man beim Ausschneiden in mehr als zwei Reihen gemäss Fig. 5 bis 8 Hubzahlen bis zu 200/min. weil Doppelschritte auszuführen sind.It has been mentioned above that driving the grippers with a controlled motor 15 is versatile Movement control made possible by means of suitable software. In particular, the stroke of the grippers can be freely selected. FIGS. 5 to 8 show possibilities for cutting blanks in more than two rows by means of suitable control of the stroke and the effectiveness of the grippers 3 and 4 (FIG. 1). In these figures, the individual strokes or the cyclical sequence of the steps in the different cutting positions are designated with letters a to f . In this way, double steps and single steps are carried out alternately in order to reach each cutting position only once. While cutting blanks in two rows according to FIG. 1, stroke rates up to 300 / min. 5 to 8 strokes up to 200 / min are achieved when cutting out in more than two rows. because double steps have to be carried out.

Es sind weitere Ausführungsvarianten möglich. Vorzugsweise kann eine für alle Zwecke geeignete Antriebseinheit vorhanden sein, die lösbar mit auswechselbaren Vorschubeinheiten mit Greifern gekuppelt werden kann. Es ist in diesem Falle besonders vorteilhaft, dass verschiedenartige modulare Vorschubeinheiten nach Bedarf montiert werden können, während immer dieselbe Antriebseinheit vorgesehen sein kann. Das ist besonders dann möglich, wenn die Antriebseinheit in der beschriebenen Weise dank elektronischer Steuerung mit beliebigen Hüben und Hubzahlen arbeiten kann.Further design variants are possible. A drive unit suitable for all purposes can preferably be present, which can be detachably coupled to interchangeable feed units with grippers. In this case, it is particularly advantageous that different types of modular feed units can be installed as required, while the same drive unit can always be provided. This is particularly possible if the drive unit can work with any strokes and stroke numbers in the manner described, thanks to electronic control.

Es sind den Bewegungsabläufen kaum Grenzen gesetzt. So kann z.B. auch ein gerader Vorschub durch je zwei geneigte Zick-Zack-Schritte erfolgen.There are hardly any limits to the movements. For example, straight feed through two inclined zigzag steps.

Claims (12)

Verfahren zum Vorschieben eines Bandes oder Streifens, insbesondere zum Ausschneiden von Rohlingen, wobei man das Band abwechslungsweise mittels mindestens zweier hin- und herbewegter Greifer vorschiebt, die nur während des Hubs in je einer Richtung mit dem Band gekuppelt werden um dasselbe vorzuschieben, derart, dass während jedes Hubs ein Vorschub erfolgt, dadurch gekennzeichnet, dass man eine quer zur generellen Vorschubbewegung gerichtete Bewegung eines gemeinsamen Antriebs in zur Antriebsbewegung geneigte Bewegungen der Greifer umsetzt.Method for advancing a band or strip, in particular for cutting blanks, the band being alternately advanced by means of at least two reciprocating grippers which are only coupled to the band in one direction during the stroke in order to advance the same, such that during each stroke, a feed takes place, characterized in that a movement of a common drive directed transversely to the general feed movement is converted into movements of the grippers inclined to the drive movement. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass man das Band mittels zweier in Längsrichtung des Bandes im Gegentakt bewegter Greifer in seiner Längsrichtung schrittweise verschiebt.A method according to claim 1, characterized in that the belt is gradually shifted in its longitudinal direction by means of two grippers moved in push-pull in the longitudinal direction of the belt. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass man das Band mittels zur Längsrichtung des Bandes in unterschiedlichen Winkeln bewegten Greifern zickzack- bzw. sägezahnartig vorschiebt.A method according to claim 1, characterized in that the band is advanced in a zigzag or sawtooth manner by means of grippers moved at different angles to the longitudinal direction of the band. Verfahren nach Anspruch 3, dadurch gekennzeichnet, dass man das Band mit unterschiedlichen Hüben vorschiebt, um in mehr als zwei Reihen Rohlinge auszustanzen.A method according to claim 3, characterized in that the tape is fed with different strokes in order to punch out blanks in more than two rows. Vorschubvorrichtung zur Durchführung des Verfahrens nach Anspruch 1, mit mindestens zwei synchron hin- und herbewegbaren Greifern (3, 4; 17, 18) die wahlweise mit dem Band (1) oder Streifen kuppelbar sind, gekennzeichnet durch ein gemeinsames hin- und hergehendes Antriebsorgan (14, 21), das mit den Greifern (3, 4; 17, 18) gekoppelt ist, die in Richtungen geführt sind, die zur Richtung der Antriebsbewegung einen Winkel bis zu 90° bilden.Feed device for carrying out the method according to claim 1, with at least two synchronously reciprocable grippers (3, 4; 17, 18) which can optionally be coupled to the belt (1) or strip, characterized by a common reciprocating drive element ( 14, 21), which is coupled to the grippers (3, 4; 17, 18) which are guided in directions which are at an angle to the direction of the drive movement Form 90 °. Vorrichtung nach Anspruch 5, gekennzeichnet durch einen elektrischen, hydraulischen oder pneumatischen Antrieb (12-15;21) für die Greifer 3,4;17,18).Apparatus according to claim 5, characterized by an electrical, hydraulic or pneumatic drive (12-15; 21) for the grippers 3, 4; 17, 18). Vorrichtung nach Anspruch 5 oder 6, gekennzeichnet durch zwei gegenläufig in Durchlaufrichtung des Bandes (1) bewegbare Greifer (17,18).Apparatus according to claim 5 or 6, characterized by two grippers (17, 18) which can be moved in opposite directions in the direction of passage of the belt (1). Vorrichtung nach Anspruch 5 oder 6, dadurch gekennzeichnet, dass in einen Winkel einschliessenden Richtungen bewegbare Greifer (3,4) vorgesehen sind.Apparatus according to claim 5 or 6, characterized in that grippers (3, 4) are provided which are movable in directions enclosing an angle. Vorrichtung nach Anspruch 8, dadurch gekennzeichnet, dass der Winkel verstellbar ist.Apparatus according to claim 8, characterized in that the angle is adjustable. Vorrichtung nach einem der Ansprüche 5 bis 9, dadurch gekennzeichnet, dass die Greifer (3,4) Führungen (23) für das Band (1) aufweisen.Device according to one of claims 5 to 9, characterized in that the grippers (3, 4) have guides (23) for the belt (1). Vorrichtung nach einem der Ansprüche 5 bis 10, dadurch gekennzeichnet, dass eine Antriebseinheit lösbar mit einer auswechselbaren Vorschubeinheit mit den Greifern verbunden ist.Device according to one of claims 5 to 10, characterized in that a drive unit is detachably connected to an interchangeable feed unit with the grippers. Vorrichtung nach einem der Ansprüche 5 bis 11, dadurch gekennzeichnet, dass das Antriebsorgan (14,21) über gleitende Kupplungselemente (12) oder über schwenkbare Gestänge (22) mit den Greifern (3,4 oder 17,18) gekuppelt ist.Device according to one of claims 5 to 11, characterized in that the drive member (14, 21) is coupled to the grippers (3, 4 or 17, 18) via sliding coupling elements (12) or via pivotable linkages (22).
EP91810894A 1990-11-23 1991-11-18 Method and device for advancing a band or a strip, in particular for cutting blanks Expired - Lifetime EP0487456B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH370990 1990-11-23
CH3709/90 1990-11-23

Publications (2)

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EP0487456A1 true EP0487456A1 (en) 1992-05-27
EP0487456B1 EP0487456B1 (en) 1994-11-17

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EP91810894A Expired - Lifetime EP0487456B1 (en) 1990-11-23 1991-11-18 Method and device for advancing a band or a strip, in particular for cutting blanks

Country Status (7)

Country Link
US (1) US5445305A (en)
EP (1) EP0487456B1 (en)
JP (1) JP3207473B2 (en)
AT (1) ATE114123T1 (en)
DE (1) DE59103540D1 (en)
DK (1) DK0487456T3 (en)
ES (1) ES2064069T3 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995017984A1 (en) * 1993-12-30 1995-07-06 Dalcos S.R.L. Gripper feeder for metal strip
CN102335698A (en) * 2011-10-17 2012-02-01 机械科学研究总院先进制造技术研究中心 High-temperature steel plate grabbing mechanical hand with heat preservation function
CN102430663A (en) * 2011-10-17 2012-05-02 机械科学研究总院先进制造技术研究中心 Flexible adjustable manipulator for catching high-temperature steel plate

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8118197B2 (en) * 2007-06-18 2012-02-21 Precision Valve Corporation Method of making aerosol valve mounting cups and resultant cups
CN103170984B (en) * 2013-04-01 2015-10-07 长沙长泰机器人有限公司 Adapt to robot flexibility gripping apparatus and the process for stamping thereof of the punching press of many specifications hot plate
EP4114628A4 (en) 2020-03-06 2024-04-10 Flexible Steel Lacing Company Cutting apparatus and method for cutting belts

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Publication number Priority date Publication date Assignee Title
GB1045699A (en) * 1964-06-08 1966-10-19 J P Udal Ltd Feed means for strip material
US3583268A (en) * 1970-05-15 1971-06-08 Albert W Scribner High speed stock feeder
US3847320A (en) * 1971-01-14 1974-11-12 A Scribner Stock feeder
FR2158074A1 (en) * 1971-10-26 1973-06-15 Royer Jean Cutting discs from moving strip - using a single punch and minimising wastage of strip material
FR2237698A1 (en) * 1973-07-18 1975-02-14 Iwk Pressen Gmbh
DE2534914A1 (en) * 1975-08-05 1977-02-10 Siemens Ag Ram operated cyclic strip feeder - supports thin unstable material through adjustable clamp gap
US4051987A (en) * 1976-04-22 1977-10-04 Scribner Albert W High speed stock feeder for punch presses and the like
US4160518A (en) * 1978-02-06 1979-07-10 Scribner Albert W Double stroke feeder
US4610380A (en) * 1984-10-26 1986-09-09 Pressmate, Inc. Stagger feeder
EP0321602A1 (en) * 1987-12-23 1989-06-28 LEINHAAS -INDUSTRIEBERATUNG Inh. Dipl.-Ing. Werner Leinhaas Gripper feeding device with pneumatically or hydraulically operated crank drives

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995017984A1 (en) * 1993-12-30 1995-07-06 Dalcos S.R.L. Gripper feeder for metal strip
US5909835A (en) * 1993-12-30 1999-06-08 Dalcos S.R.L. Gripper feeder for metal strip
CN102335698A (en) * 2011-10-17 2012-02-01 机械科学研究总院先进制造技术研究中心 High-temperature steel plate grabbing mechanical hand with heat preservation function
CN102430663A (en) * 2011-10-17 2012-05-02 机械科学研究总院先进制造技术研究中心 Flexible adjustable manipulator for catching high-temperature steel plate
CN102430663B (en) * 2011-10-17 2015-01-21 机械科学研究总院先进制造技术研究中心 Flexible adjustable manipulator for catching high-temperature steel plate

Also Published As

Publication number Publication date
ES2064069T3 (en) 1995-01-16
US5445305A (en) 1995-08-29
DE59103540D1 (en) 1994-12-22
ATE114123T1 (en) 1994-12-15
DK0487456T3 (en) 1995-01-30
JP3207473B2 (en) 2001-09-10
JPH04266435A (en) 1992-09-22
EP0487456B1 (en) 1994-11-17

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