EP0184079B1 - Device for transferring work pieces through a multistage press for massive conversion - Google Patents

Device for transferring work pieces through a multistage press for massive conversion Download PDF

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Publication number
EP0184079B1
EP0184079B1 EP85114814A EP85114814A EP0184079B1 EP 0184079 B1 EP0184079 B1 EP 0184079B1 EP 85114814 A EP85114814 A EP 85114814A EP 85114814 A EP85114814 A EP 85114814A EP 0184079 B1 EP0184079 B1 EP 0184079B1
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EP
European Patent Office
Prior art keywords
swinging arms
grippers
workpieces
movement
swinging
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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
EP85114814A
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German (de)
French (fr)
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EP0184079A2 (en
EP0184079A3 (en
Inventor
Klaus Blei
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L Schuler GmbH
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L Schuler GmbH
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Publication of EP0184079A2 publication Critical patent/EP0184079A2/en
Publication of EP0184079A3 publication Critical patent/EP0184079A3/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K27/00—Handling devices, e.g. for feeding, aligning, discharging, Cutting-off means; Arrangement thereof
    • B21K27/02—Feeding devices for rods, wire, or strips
    • B21K27/04—Feeding devices for rods, wire, or strips allowing successive working steps

Definitions

  • the invention relates to a device for conveying workpieces from one processing stage to the next in a multi-stage press for massive forming with gripper tongs that can be moved back and forth in the conveying direction and perpendicularly to it, each gripper tongs being arranged in the extension of a coupling articulated by two driven swing arms.
  • DE-PS 11 44 085 shows a device for transferring workpieces from one tool to the subsequent tool in a multi-stage press with a gripper tongs attached to a coupling.
  • Two swing arms are articulated to the coupling, which are operatively connected to a cam follower part of a cam control via swivel arms, push rods and other deflection means. When it is driven (rotation of a cam disc), each swing arm causes a partial movement of the gripper tongs.
  • the two last-mentioned devices have the disadvantage that only rotationally symmetrical workpieces can be implemented for further processing in or in the next processing stage (s) and that the gripping position for the ejector operation takes place via two setting criteria.
  • the object of the invention is to provide a device of the generic type with a higher than previously possible number of cycles and with an improved possibility of coordinating the gripper operation on the plunger and ejector ,, plunger movements, both the movement of the gripper towards the tools to and from them away as well as the movement of the gripper tongs in the conveying direction and in the direction opposite to the conveying direction can be effected by a single drive means.
  • the workpieces are deposited in the subsequent machining step without twisting.
  • Advantages also result from the fact that only one drive means is required for the conversion movements of the gripper tongs.
  • the movement of each gripper tongs corresponds to the movement of the coupling point of each swing arm on the coupling.
  • the pivot points of the swing arms are fixed in the gun box.
  • the means and the design of the swing arms and the coupling for a constant parallel alignment of the coupling allow both the use of the device for active gripper tongs, parallel drive movements of all couplers, as well as the use of the device for non-active gripper tongs with a conversion movement taking place depending on the ejector movement.
  • the transfer movements of workpieces 5 in the processing stages 2 and 3 and into the storage station 4 take place according to FIGS. 1 and 2 by means of active gripper tongs 1 in the conveying direction device 25.
  • the gripper tongs 1 are arranged in an end region 7 of a support plate 6 and essentially consist of pliers legs 18 which can be pivoted about pivot points 19 by means of closer-opener part 17.
  • the support plate 6 forms a coupling articulated via swing arms 9 and extended beyond the articulation points 30.
  • each swing arm 9 takes place via a gearwheel 11, to which the swing arm 9 is rigidly connected, and via an intermediate gearwheel 12, which is connected to both gearwheels 11 and which is connected via a linkage rod 15, which is rigidly connected to the intermediate gearwheel 12, to a pendulum indexing gear 13 Connecting rod 14 is connected.
  • the connecting rod 14 connects all the link rods 15 for a synchronous transfer movement of the gripper tongs 1.
  • Gears 11 and intermediate gears 12 are rotatably mounted in a pliers box 20. At least the swing arms 9 belonging together in pairs are of equal length. The distance between the center bearings of the gear wheels 11 corresponds to the distance between the articulation points 30 of the swing arms 9 on the support plate 6.
  • the swing arms 9 are always in parallel alignment with one another during the movement and in the transfer / transfer stations for the workpieces also in parallel alignment with the conveying direction 25
  • the movement of an articulation point 16 of the connecting rod 14 on the articulation rod 15 on a circular arc around the intermediate gear 12 can correspond to the movement of the pendulum locking gear 13 from rest to rest; an intermediate gear is thus avoided.
  • the movement 10 'of the workpieces 5 corresponds to the movement 10 of the coupling points 30.
  • a coupling 21 is introduced for the transmission of movement for the gripper tongs activities.
  • the coupling 21 can consist of a guide groove 23, which is introduced transversely to the longitudinal extent of a displaceably mounted on the support plate 6 and with the closer-opener part 17 in operative connection rod 22 is inserted therein.
  • a sliding block 24 is slidably mounted; which is connected to an articulated shaft 26 via a cranked lever 33.
  • the articulation shaft 26 is rotated from a cam follower part 28, which is placed on a control cam 27 by means of a pressure cylinder 31 via a roller 29 and the cam profiling takes place during its rotation.
  • the linear movement of the cam follower part 28 is deflected via a cranked lever 32 into a rotational movement and into a counter-rotating movement of the propeller shaft 26.
  • the conversion of the rotary movements of the cardan shaft 26 into a linear movement which adjusts the closer / opener part 17 takes place via the cranked lever 33.
  • the opening and closing movements of the gripper tongs 1 and their conversion movements for the workpieces 5 are due to the ejection process of the workpieces 5 from FIG in the processing stages 2, 3 and to match the movement of the press ram holding the male.
  • FIG. 3 illustrates these dependencies.
  • the gripper tongs 1 move against the conveying direction 25 (FIG. 1) without workpieces 5.
  • the pendulum gear 13 (FIG. 1) stops, the ejection activity falls and the gripper tongs 1 are to be closed.
  • the gripper tongs 1 must be opened to transfer the workpieces 5. Transfer, transfer and transfer of the workpieces 5 and part of the movement of the gripper tongs 1 with the workpiece 5 from the tool area takes place in the movement phase of the ram after opening and before closing the tools.
  • Control cams 27 and the movement-transmitting means 28, 29, 31, 32, 26, 33, 22 are to be provided in the number of gripper tongs 1 to be controlled.
  • each of the intermediate gear wheels 12 takes place here, for example, from a control cam 52 each via a cam follower part 50, which is attached to the control cam 52 via a roller 51, and a connecting rod 49 articulated to the articulation point 16 of the articulation rod 15, which is rigidly connected to the intermediate gear wheel 12 Support rod 46, on which the pair of co-operating pliers legs 47 are mounted in pivot points 53 on the area extended beyond the coupling.
  • the holding force for the workpieces 5 is caused by a compression spring 48.
  • the gear ratios, their translation, the lengths of the swing arms 9 and the bearing and articulation points correspond to those of the dimensions described for FIGS. 1 and 2.
  • the gripper tongs 41 are adjusted to take over the workpieces 5 at the end of the ejection movement of the workpieces 5 from the die into the workpiece area. On the one hand, this results in the individual drive of each gripper tongs, and on the other hand, the movements of the gripper tongs 41 towards the workpieces 5 can be adjusted via variable envelopes of the control curve 52, in particular with regard to the time at which the workpieces 5 are detected.
  • the linear movement of the cam follower part 50 and the connecting rod 49 is converted into rotary movements of the intermediate gear 12 via a cranked lever 54.
  • the diagram in FIG. 6 shows the varia blen area of the takeover of the workpiece 5 from the tool, which falls into the working area of the ejector, and the variable area of the transfer of the workpiece 5 to the tool before the return movement of the gripper tongs 41 opposite to the conveying direction 25.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manipulator (AREA)
  • Forging (AREA)

Description

Die Erfindung betrifft eine Vorrichtung zum Fördern von Werkstücken von einer Bearbeitungsstufe zur nächsten in einer Mehrstufenpresse für die Massivumformung mit in Förderrichtung und senkrecht dazu hin- und herbewegbaren Greiferzangen, wobei jede Greiferzange in der Verlängerung einer von zwei getriebenen Schwingarmen angelenkten Koppel angeordnet ist.The invention relates to a device for conveying workpieces from one processing stage to the next in a multi-stage press for massive forming with gripper tongs that can be moved back and forth in the conveying direction and perpendicularly to it, each gripper tongs being arranged in the extension of a coupling articulated by two driven swing arms.

Vorrichtungen der Art dienen dem Umsetzen von Werkstücken von Werkzeug zu Werkzeug. Es ist notwendig, daß die Werkstücke im richtigen Zeitpunkt der Stößelbewegung (Bewegung der Patrize) sich zwischen Patrize und Matrize befinden und daß die Werkstücke nach dem Umformen in Abhängigkeit von der Bewegung des Auswerferstößels von den in die vorhergehende Bearbeitungsstufe zurückbewegten Greiferzangen wieder erfaßt werden. Oftmals sind auch solche Werkstücke zu formen, die unsymmetrische Formteile oder mehrkantige Ansätze aufweisen. Diese Werkstücke dürfen während der Umsetzbewegung nicht verdreht werden. Hierzu sind bei einer bekannten Einrichtung (DE-PS 24 34 540) zum Quertransport von Werkstücken in einer mehrstufigen Umformpresse alle Greiferzangen auf einem Träger angebracht, der in Förderrichtung verschiebbar ist. Die auf das Werkzeug zu bzw. von diesem weggeführte Bewegung der Greiferzangen erfolgt mit der Schließ-/Öffnenbewegung der Greiferzangen. Es sind größe Massen zu beschleunigen und zu bewegen und eine weitere Steigerung der Taktzahl ist von daher ausgeschlossen.Devices of the type are used to transfer workpieces from tool to tool. It is necessary that the workpieces are between the male and female molds at the right time of the ram movement (movement of the male part) and that the workpieces are gripped again by the gripper tongs which have moved back to the previous processing stage depending on the movement of the ejector plunger. Often, workpieces are also to be formed that have asymmetrical molded parts or polygonal approaches. These workpieces must not be rotated during the transfer movement. For this purpose, in a known device (DE-PS 24 34 540) for the transverse transport of workpieces in a multi-stage forming press, all gripper tongs are mounted on a carrier which is displaceable in the conveying direction. The movement of the gripper tongs towards or away from the tool occurs with the closing / opening movement of the gripper tongs. Large masses have to be accelerated and moved and a further increase in the number of cycles is therefore impossible.

In der DE-PS 21 48 529 sind Greiferzangen an den Endbereichen von Greiferschienen gelagert, die in Trägerhebeln verschieblich auf ein Werkzeug zu und von diesem wegbewegbar und für den Werkstücktransport mit den Trägerhebeln um einen Schwenkpunkt schwenkbar sind. Der sich auf die Lage des Werkstückes übertragende Schwenkfehler muß im Werkzeug der nachfolgenden Stufe berücksichtigt werden.In DE-PS 21 48 529 gripper tongs are mounted on the end regions of gripper rails, which are displaceable in support levers towards and away from a tool and can be pivoted about a pivot point with the support levers for workpiece transport. The swivel error that is transferred to the position of the workpiece must be taken into account in the tool of the subsequent stage.

In der DE-PS 11 44 085 ist eine Vorrichtung zum Umsetzen von Werkstücken von einem Werkzeug zum nachfolgenden Werkzeug in einer Mehrstufenpresse gezeigt mit einer an einer Koppel angebrachten Greiferzange. An die Koppel sind zwei Schwingarme angelenkt, die über Schwenkarme, Schubstangen und weitere Umlenkmittel mit je einem Kurvenfolgerteil einer Kurvensteuerung wirkverbunden sind. Jeder Schwingarm bewirkt bei seinem Antrieb (Drehung einer Kurvenscheibe) einen Teilweg der Umsetzbewegung der Greiferzange.DE-PS 11 44 085 shows a device for transferring workpieces from one tool to the subsequent tool in a multi-stage press with a gripper tongs attached to a coupling. Two swing arms are articulated to the coupling, which are operatively connected to a cam follower part of a cam control via swivel arms, push rods and other deflection means. When it is driven (rotation of a cam disc), each swing arm causes a partial movement of the gripper tongs.

Den beiden letztgenannten Vorrichtungen haftet der Nachteil an, daß nur rotationssymmetrische Werkstücke umgesetzt werden können zur Weiterbearbeitung in den bzw. in der nächsten Bearbeitungsstufe (n) und daß die Greifstellung für den Auswerferbetrieb über zwei Einstellkriterien erfolgt.The two last-mentioned devices have the disadvantage that only rotationally symmetrical workpieces can be implemented for further processing in or in the next processing stage (s) and that the gripping position for the ejector operation takes place via two setting criteria.

Aufgabe der Erfindung ist die Schaffung einer Vorrichtung gattungsgemäßer Art mit einer höheren als bisher möglichen Taktzahl und mit einer verbesserten Abstimmungsmöglichkeit des Greiferzangenbetriebes auf die Stößel- und Auswerfer-,, stößel-Bewegungen, wobei sowohl die Bewegung der Greiferzangen auf die Werkzeuge zu und von diesen weg als auch die Bewegung der Greiferzangen in Förderrichtung und in der der Förderrichtung entgegengesetzten Richtung über ein einziges Antriebsmittel bewirkt werden.The object of the invention is to provide a device of the generic type with a higher than previously possible number of cycles and with an improved possibility of coordinating the gripper operation on the plunger and ejector ,, plunger movements, both the movement of the gripper towards the tools to and from them away as well as the movement of the gripper tongs in the conveying direction and in the direction opposite to the conveying direction can be effected by a single drive means.

Diese Aufgabe ist bei einer Vorrichtung gattungsgemäßer Art dadurch gelöst, daß Mittel vorgesehen sind und Schwingarme und Koppel ausgebildet sind für eine ständige parallele Ausrichtung der Koppel während der Bewegung der Greiferzangen zu ihrer durch die Übernahme- /Übergabeposition vorgegebenen Ausrichtung.This object is achieved in a device of the generic type in that means are provided and oscillating arms and couplings are designed for a constant parallel alignment of the coupler during the movement of the gripper tongs to their orientation specified by the takeover / transfer position.

Erfindungswesentlich ist, daß die Werkstücke ohne Verdrehung in der nachfolgenden Bearbeitungsstufe abgesetzt werden. Vorteile ergeben sich auch daraus, daß für die Umsetzbewegungen der Greiferzangen nur ein Antriebsmittel benötigt wird. Die Bewegung jeder Greiferzange entspricht der Bewegung des Koppelpunktes jedes Schwingarmes an der Koppel. Die Drehpunkte der Schwingarme liegen fest in dem Zangenkasten. Die Mittel und die Ausbildung der Schwingarme und der Koppel für eine ständige parallele Ausrichtung der Koppel gestatten sowohl die Verwendung der Vorrichtung für aktive Greiferzangen, parallele Antriebsbewegungen aller Koppeln, als auch die Verwendung der Vorrichtung für nichtaktive Greiferzangen mit in Abhängigkeit von der Auswerferbewegung erfolgender Umsetzbewegung.It is essential to the invention that the workpieces are deposited in the subsequent machining step without twisting. Advantages also result from the fact that only one drive means is required for the conversion movements of the gripper tongs. The movement of each gripper tongs corresponds to the movement of the coupling point of each swing arm on the coupling. The pivot points of the swing arms are fixed in the gun box. The means and the design of the swing arms and the coupling for a constant parallel alignment of the coupling allow both the use of the device for active gripper tongs, parallel drive movements of all couplers, as well as the use of the device for non-active gripper tongs with a conversion movement taking place depending on the ejector movement.

Die weiteren Ansprüche betreffen bevorzugte Ausführungsformen der Erfindung.The further claims relate to preferred embodiments of the invention.

Anhand von Ausführungsbeispielen in der Zeichnung soll die Erfindung im folgenden beschrieben werden. Dabei zeigen

  • Fig. 1 schematisch den Antrieb für die Umsetzbewegungen aktiver Greiferzangen,
  • Fig. 2 schematisch den Antrieb für die Schließ-/ Öffnenbewegungen der Greiferzangen in einer Ansicht gemäß der Pfeilrichtung 11-11 in Fig. 1,
  • Fig. 3 ein Diagramm zur Darstellung der Abhängigkeiten zwischen Auswerferstößel-Bewegung, GreiferzangenBewegung und-Aktivität und Stößelbewegung,
  • Fig. 4 schematisch den Antrieb für die Umsetzbewegungen nicht-aktiver Greiferzangen,
  • Fig. 5 schematisch den Antrieb für die Umsetzbewegungen nicht-aktiver Greiferzangen in einer Ansicht gemäß der Pfeilrichtung V-V in Fig. 4 und
  • Fig. 6 ein Diagramm zur Darstellung der Abhängigkeiten zwischen Auswerferstößel-Bewegung, GreiferzangenBewegung und Stößelbewegung.
The invention will be described below with reference to exemplary embodiments in the drawing. Show
  • 1 schematically shows the drive for the transfer movements of active gripper tongs,
  • 2 schematically shows the drive for the closing / opening movements of the gripper tongs in a view in the direction of arrow 11-11 in FIG. 1,
  • 3 shows a diagram to show the dependencies between ejector tappet movement, gripper tongs movement and activity and tappet movement,
  • 4 schematically shows the drive for the transfer movements of inactive gripper tongs,
  • 5 schematically shows the drive for the conversion movements of inactive gripper tongs in a view in the direction of the arrow VV in FIGS. 4 and
  • Fig. 6 is a diagram showing the dependencies between ejector plunger movement, gripper tongs movement and plunger movement.

Die Umsetzbewegungen von Werkstücken 5 in den Bearbeitungsstufen 2 und 3 und in die Ablagestation 4 erfolgt entsprechend den Fig. 1 und 2 vermittels aktiver Greiferzangen 1 in Förderrichtung 25. Die Greiferzangen 1 sind in einem Endbereich 7 einer Tragplatte 6 angeordnet und bestehen im wesentlichen aus Zangenschenkeln 18, die vermittels Schließer-Öffnerteil 17 um Drehpunkte 19 schwenkbar sind. Die Tragplatte 6 bildet eine über Schwingarme 9 angelenkte und über die Anlenkpunkte 30 hinaus verlängerte Koppel. Der Bewegungsantrieb jedes Schwingarmes 9 erfolgt über je ein Zahnrad 11, an das der Schwingarm 9 starr angeschlossen ist, und über ein an beide Zahnräder 11 angelegtes Zwischenzahnrad 12, das über eine starr mit dem Zwischenzahnrad 12 verbundene Anlenkstange 15 mit einer an ein Pendelrastgetriebe 13 angeschlossenen Pleuelstange 14 verbunden ist. Die Pleuelstange 14 verbindet alle Anlenkstangen 15 für eine Synchron-Transferbewegung der Greiferzangen 1. Zahnräder 11 und Zwischenzahnräder 12 sind in einem Zangenkasten 20 drehbar gelagert. Es sind zumindest die paarweise zusammengehörenden Schwingarme 9 gleich lang. Der Abstand der Mittenlagerungen der Zahnräder 11 entspricht dem Abstand der Anlenkpunkte 30 der Schwingarme 9 an der Tragplatte 6. Die Schwingarme 9 sind während der Bewegung stets in paralleler Ausrichtung zueinander und in den Übernahme- /Übergabestationen für die Werkstücke in ebenfalls paralleler Ausrichtung zur Förderrichtung 25. Das Übersetzungsverhältnis zwischen Zwischenzahnrad 12 und jedem Zahnrad 11 kann z. B. i = 1:2 betragen, so daß sich für eine Drehung des Zwischenzahnrades 12 von 90 Winkelgrad eine Drehung der Zahnräder 11 um 180 Winkelgrad ergibt. Die Bewegung eines Anlenkpunktes 16 der Pleuelstange 14 an der Anlenkstange 15 auf einem Kreisbogen um das Zwischenzahnrad 12 kann der Bewegung des Pendelrastgetriebes 13 von Rast zu Rast entsprechen ; damit wird ein Zwischengetriebe vermieden. Die Bewegung 10' der Werkstücke 5 entspricht der Bewegung 10 der Koppelpunkte 30. In einem zweiten Endbereich 8 ist eine Kupplung 21. eingebracht zur Bewegungsübertragung für die Greiferzangen-Aktivitäten. Die Kupplung 21 kann aus einer Führungsnut 23 bestehen, die quer zur Längserstreckung einer auf der Tragplatte 6 verschieblich gelagerten und mit dem Schließer-Öffnerteil 17 in Wirkverbindung stehenden Stellstange 22 in diese eingebracht ist. In der Führungsnut 23 ist ein Gleitstein 24 verschieblich gelagert ; der über einen gekröpften Hebel 33 mit einer Gelenkwelle 26 verbunden ist. Die Drehung der Gelenkwelle 26 erfolgt von einem Kurvenfolgerteil 28 aus, der vermittels Druckzylinder 31 über eine Rolle 29 an eine Steuerkurve 27 gelegt ist und der Nockenprofilierung bei deren Drehung erfolgt. Die lineare Bewegung des Kurvenfolgerteiles 28 wird über einen gekröpften Hebel 32 in eine Drehbewegung und in eine gegenläufige Drehbewegung der Gelenkwelle 26 umgelenkt. Die Umwandlung der Drehbewegungen der Gelenkwelle 26 in eine lineare, den Schließer-/Öffnerteil 17 verstellende Bewegung erfolgt über den gekröpften Hebel 33. Die Öffnen- und Schließbewegungen der Greiferzangen 1 und deren Umsetzbewegungen für die Werkstücke 5 sind auf den Auswerfervorgang der Werkstücke 5 aus den in den Bearbeitungsstufen 2, 3 befindlichen Matrizen und auf die Bewegung des die Patrize haltenden Pressenstößels abzustimmen.The transfer movements of workpieces 5 in the processing stages 2 and 3 and into the storage station 4 take place according to FIGS. 1 and 2 by means of active gripper tongs 1 in the conveying direction device 25. The gripper tongs 1 are arranged in an end region 7 of a support plate 6 and essentially consist of pliers legs 18 which can be pivoted about pivot points 19 by means of closer-opener part 17. The support plate 6 forms a coupling articulated via swing arms 9 and extended beyond the articulation points 30. The movement drive of each swing arm 9 takes place via a gearwheel 11, to which the swing arm 9 is rigidly connected, and via an intermediate gearwheel 12, which is connected to both gearwheels 11 and which is connected via a linkage rod 15, which is rigidly connected to the intermediate gearwheel 12, to a pendulum indexing gear 13 Connecting rod 14 is connected. The connecting rod 14 connects all the link rods 15 for a synchronous transfer movement of the gripper tongs 1. Gears 11 and intermediate gears 12 are rotatably mounted in a pliers box 20. At least the swing arms 9 belonging together in pairs are of equal length. The distance between the center bearings of the gear wheels 11 corresponds to the distance between the articulation points 30 of the swing arms 9 on the support plate 6. The swing arms 9 are always in parallel alignment with one another during the movement and in the transfer / transfer stations for the workpieces also in parallel alignment with the conveying direction 25 The transmission ratio between the intermediate gear 12 and each gear 11 can, for. B. i = 1: 2, so that a rotation of the intermediate gear 12 of 90 angular degrees results in a rotation of the gears 11 by 180 angular degrees. The movement of an articulation point 16 of the connecting rod 14 on the articulation rod 15 on a circular arc around the intermediate gear 12 can correspond to the movement of the pendulum locking gear 13 from rest to rest; an intermediate gear is thus avoided. The movement 10 'of the workpieces 5 corresponds to the movement 10 of the coupling points 30. In a second end region 8, a coupling 21 is introduced for the transmission of movement for the gripper tongs activities. The coupling 21 can consist of a guide groove 23, which is introduced transversely to the longitudinal extent of a displaceably mounted on the support plate 6 and with the closer-opener part 17 in operative connection rod 22 is inserted therein. In the guide groove 23, a sliding block 24 is slidably mounted; which is connected to an articulated shaft 26 via a cranked lever 33. The articulation shaft 26 is rotated from a cam follower part 28, which is placed on a control cam 27 by means of a pressure cylinder 31 via a roller 29 and the cam profiling takes place during its rotation. The linear movement of the cam follower part 28 is deflected via a cranked lever 32 into a rotational movement and into a counter-rotating movement of the propeller shaft 26. The conversion of the rotary movements of the cardan shaft 26 into a linear movement which adjusts the closer / opener part 17 takes place via the cranked lever 33. The opening and closing movements of the gripper tongs 1 and their conversion movements for the workpieces 5 are due to the ejection process of the workpieces 5 from FIG in the processing stages 2, 3 and to match the movement of the press ram holding the male.

Diese Abhängigkeiten veranschaulicht das Diagramm in Fig. 3. Ausgehend von der Stößelbewegung beim Durchfahren des vorderen Totpunktes V. T., hierbei ist das Werkzeug aus Matrize und Patrize geschlossen, erfolgt die Bewegung der Greiferzangen 1 entgegen der Förderrichtung 25 (Fig. 1) ohne Werkstücke 5. In die Zeit des Stillstandes der Greiferzangen 1, Rast des Pendelgetriebes 13 (Fig. 1), fällt 5 die Auswerfertätigkeit und die Greiferzangen 1 sind zu schließen. Nach dem Transport der Werkstücke 5 in die nachfolgende Bearbeitungsstation 3 bzw. in die Ablagestation 4 sind zur Übergabe der Werkstücke 5 die Greiferzangen 1 zu öffnen. Übernahme, Transfer und Übergabe der Werkstücke 5 sowie ein Teil der Bewegung der Greiferzangen 1 mit dem Werkstück 5 aus dem Werkzeugbereich erfolgt in der Bewegungsphase des Stößels nach dem Öffnen und vor dem Schließen der Werkzeuge.The diagram in FIG. 3 illustrates these dependencies. Starting from the tappet movement when passing through the front dead center VT, the tool consisting of the matrix and the male part being closed, the gripper tongs 1 move against the conveying direction 25 (FIG. 1) without workpieces 5. At the time the gripper tongs 1 are at a standstill, the pendulum gear 13 (FIG. 1) stops, the ejection activity falls and the gripper tongs 1 are to be closed. After the transport of the workpieces 5 into the subsequent processing station 3 or into the storage station 4, the gripper tongs 1 must be opened to transfer the workpieces 5. Transfer, transfer and transfer of the workpieces 5 and part of the movement of the gripper tongs 1 with the workpiece 5 from the tool area takes place in the movement phase of the ram after opening and before closing the tools.

Das Schließen der Zangen nach dem Werkstückausstoß ist über die Steuerkurven 27 abzustimmen. Hierbei sind Steuerkurven 27 und die Bewegung übertragende Mittel 28, 29, 31, 32, 26, 33, 22 in der Anzahl anzusteuernder Greiferzangen 1 vorzusehen.The closing of the pliers after workpiece ejection is to be coordinated via the control cams 27. Control cams 27 and the movement-transmitting means 28, 29, 31, 32, 26, 33, 22 are to be provided in the number of gripper tongs 1 to be controlled.

In den Fig. 4 und 5 ist der Antrieb von nichtaktiven Greiferzangen 41 gezeigt mit den zu den Fig. 1 und 2 beschriebenen Mitteln 9, 11, 12, 15, 16 für die Umsetzbewegung 10' der Greiferzangen 41. Der Antrieb jedes der Zwischenzahnräder 12 erfolgt hier beispielsweise von je einer Steuerkurve 52 aus über einen über eine Rolle 51 an die Steuerkurve 52 angelegten Kurvenfolgerteil 50 und eine an den Anlenkpunkt 16 der mit dem Zwischenzahnrad 12 starr verbundenen Anlenkstange 15 angelenkten Pleuelstange 49. Die die Schwingarme 9 verbindende Koppel bildet hier eine Tragstange 46, an derem über die Koppel hinaus verlängerten Bereich paarweise zusammenwirkende Zangenschenkel 47 in Drehpunkten 53 gelagert sind. Die Haltekraft für die Werkstücke 5 bewirkt eine Druckfeder 48. Die Zahnradverhältnisse, deren Übersetzung, die Längen der Schwingarme 9 und die Lagerund Anlenkpunkte entsprechen denen der zu den Fig. 1 und 2 beschriebenen Abmessungen. Die Greiferzangen 41 sind zur Übernahme der Werkstücke 5 zum Schluß der Auswerferbewegung der Werkstücke 5 aus der Matrize in den Werkstückbereich zu verstellen. Einerseits ergibt sich hieraus der Einzelantrieb jeder Greiferzange, andererseits sind die Bewegungsabläufe der Greiferzangen 41 auf die Werkstücke 5 zu, insbesondere im Hinblick auf den Zeitpunkt des Erfassens der Werkstücke 5, über veränderbare Hüllkurven der Steuerkurve 52 einstellbar. Die Umwandlung der Linearbewegung von Kurvenfolgerteil 50 und Pleuelstange 49 in Drehbewegungen des Zwischenzahnrades 12 erfolgt über einen gekröpften Hebel 54.4 and 5 show the drive of inactive gripper tongs 41 with the means 9, 11, 12, 15, 16 described for FIGS. 1 and 2 for the transfer movement 10 'of the gripper tongs 41. The drive of each of the intermediate gear wheels 12 takes place here, for example, from a control cam 52 each via a cam follower part 50, which is attached to the control cam 52 via a roller 51, and a connecting rod 49 articulated to the articulation point 16 of the articulation rod 15, which is rigidly connected to the intermediate gear wheel 12 Support rod 46, on which the pair of co-operating pliers legs 47 are mounted in pivot points 53 on the area extended beyond the coupling. The holding force for the workpieces 5 is caused by a compression spring 48. The gear ratios, their translation, the lengths of the swing arms 9 and the bearing and articulation points correspond to those of the dimensions described for FIGS. 1 and 2. The gripper tongs 41 are adjusted to take over the workpieces 5 at the end of the ejection movement of the workpieces 5 from the die into the workpiece area. On the one hand, this results in the individual drive of each gripper tongs, and on the other hand, the movements of the gripper tongs 41 towards the workpieces 5 can be adjusted via variable envelopes of the control curve 52, in particular with regard to the time at which the workpieces 5 are detected. The linear movement of the cam follower part 50 and the connecting rod 49 is converted into rotary movements of the intermediate gear 12 via a cranked lever 54.

Das Diagramm in Fig. 6 zeigt hierzu den variablen Bereich der Übernahme des Werkstückes 5 aus dem Werkzeug, der in den Arbeitsbereich des Auswerfers fällt, und den variablen Bereich der Übergabe des Werkstückes 5 an das Werkzeug vor der der Förderrichtung 25 entgegengerichteten Rückbewegung der Greiferzangen 41.The diagram in FIG. 6 shows the varia blen area of the takeover of the workpiece 5 from the tool, which falls into the working area of the ejector, and the variable area of the transfer of the workpiece 5 to the tool before the return movement of the gripper tongs 41 opposite to the conveying direction 25.

Claims (7)

1. Apparatus for conveying workpieces (5) in a multi-stage press for massive forming, comprising grippers (1, 41) which are movable in a reciprocating manner and which take hold of the workpieces (5) and transfer them into the processing stages (2, 3, 4), each of the grippers (1, 41) being arranged in the extension of a coupler (6, 46) articulated by two swinging arms (9) and the swinging arms (9) being drivable in a swinging motion via drive means (11, 12, 13, 14, 15, 52), characterized in that each of the swinging arms (9), in the end part remote from the coupler (6, 46), is mounted on the frame side, and at least one swinging lever (9) can be driven about this swinging point, that at least the swinging arms (9) in each case forming a pair are of the same length and therefore the motion of the coupler (6, 46) together with the grippers (1, 41) between the processing stages (2, 3, 4) takes place on a circular arc (10') predetermined by the swinging arms (9), and that the motion of the grippers (1, 41) is limited by a reversal in the motion of the drive means (11, 12, 13, 14, 15, 52) when the particular processing stage (2, 3, 4) is reached.
2. Apparatus according to Claim 1, characterized in that the swinging arms (9) articulated on the coupler (6, 46), are parallel to one another and, in the receiving (2) and transfer position (3) for the workpieces (5), essentially in the conveying direction (25), are rigidly fixed to one gear wheel (11) each, and that the gear wheels (11) are driven via a common intermediate gear wheel (12) at the same gear ratio between intermediate gear wheel (12) and each gear wheel (11).
3. Apparatus according to Claim 1 or 2, characterized in that the swinging arms (9), via the intermediate gear wheel (12), are driven via a pendulum dwell mechanism (13).
4. Apparatus according to one or more of Claims 1 to 3, characterized in that the intermediate gear wheels (12), present in the same number as the number of grippers (1, 41), are connected to one another via a connecting rod (14) which is operatively connected to the drive for the swinging arms (9).
5. Apparatus according to one or more of Claims 1 to 4, characterized in that each gripper (1) is arranged in a first end area (7) of. a supporting plate (6) on which the swinging arms (9) act, that each gripper (1) is designed in such a way that it can be activated for closing and opening and has one closing/opening part (17) in each case, and that there is arranged in the second end area (8) of the supporting plate (6) a coupling (21) which on the output side is operatively connected via a control rod (22) to the closing/opening part (17) of the gripper (1) and on the drive side is operatively connected via a universal-joint shaft (26) to a cam follower part (28) of a controlling cam (27).
6. Apparatus according to Claim 1 or 2, characterized in that each of the intermediate gear wheels (12), present in the same number as the number of grippers (41), is operatively connected via one connecting rod (49) in each case to cam follower parts (50) brought into contact with controlling cams (52) independently of one another.
7. Apparatus according to Claim 5, characterized in that the coupling (21) in the second end area (8) of the supporting plate (6) consists of a guide groove (23), made in the control rod (22) and running essentially at right angles to the deflection movement of the control rod (22), and a sliding block (24) inserted into this guide groove (23) and connected to the end part of the universal-joint shaft (26).
EP85114814A 1984-12-01 1985-11-21 Device for transferring work pieces through a multistage press for massive conversion Expired EP0184079B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19843443874 DE3443874A1 (en) 1984-12-01 1984-12-01 DEVICE FOR CONVEYING WORKPIECES IN A MULTI-STAGE PRESS FOR SOLID FORMING
DE3443874 1984-12-01

Publications (3)

Publication Number Publication Date
EP0184079A2 EP0184079A2 (en) 1986-06-11
EP0184079A3 EP0184079A3 (en) 1987-10-21
EP0184079B1 true EP0184079B1 (en) 1989-07-19

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EP85114814A Expired EP0184079B1 (en) 1984-12-01 1985-11-21 Device for transferring work pieces through a multistage press for massive conversion

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EP (1) EP0184079B1 (en)
DE (2) DE3443874A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5775163A (en) * 1995-12-07 1998-07-07 Schuler Pressen Gmbh & Co. Transfer arrangement for multistation presses
CN109070179A (en) * 2016-04-28 2018-12-21 哈特伯金属成型机股份公司 Transport device for conveying work pieces in process equipment

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH712403A1 (en) 2016-04-28 2017-10-31 Hatebur Umformmaschinen Ag Transport method for transferring workpieces between several successive stages of a processing device.
CH712402A1 (en) * 2016-04-28 2017-10-31 Hatebur Umformmaschinen Ag Transport device with grippers for moving workpieces in a forming device comprising at least two stages.

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE789371A (en) * 1971-09-29 1973-01-15 Peltzer & Ehlers DEVICE FOR TRANSPORTING PARTS FROM ONE DIE TO THE NEXT IN MULTI-STAGE PRESSES.
DE2434540C2 (en) * 1974-07-18 1983-09-08 Hatebur Umformmaschinen AG, Basel Device for the automatic transverse transport of workpieces on multi-stage forming presses
NL165398C (en) * 1977-09-13 1981-04-15 Nedschroef Octrooi Maats DEVICE FOR TRANSFERRING MACHINED PRODUCTS ON A TOOLING TOOL FROM THE ONE MACHINING STATION TO THE FOLLOWING.

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5775163A (en) * 1995-12-07 1998-07-07 Schuler Pressen Gmbh & Co. Transfer arrangement for multistation presses
CN109070179A (en) * 2016-04-28 2018-12-21 哈特伯金属成型机股份公司 Transport device for conveying work pieces in process equipment
CN109070179B (en) * 2016-04-28 2020-12-22 哈特伯金属成型机股份公司 Transport device for transporting workpieces in a processing installation

Also Published As

Publication number Publication date
EP0184079A2 (en) 1986-06-11
DE3571564D1 (en) 1989-08-24
DE3443874A1 (en) 1986-07-10
EP0184079A3 (en) 1987-10-21

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