EP0753364A1 - Multi-stage press for forms - Google Patents

Multi-stage press for forms Download PDF

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Publication number
EP0753364A1
EP0753364A1 EP96111004A EP96111004A EP0753364A1 EP 0753364 A1 EP0753364 A1 EP 0753364A1 EP 96111004 A EP96111004 A EP 96111004A EP 96111004 A EP96111004 A EP 96111004A EP 0753364 A1 EP0753364 A1 EP 0753364A1
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EP
European Patent Office
Prior art keywords
stage press
transport
press according
grippers
forming
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.)
Ceased
Application number
EP96111004A
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German (de)
French (fr)
Inventor
Willi Dipl.-Ing. Mielke
Werner Maasen
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.)
Formatech Maschinen und Service fur Die Umformtec
L Schuler GmbH
Original Assignee
FORMATECH GES fur MASCHINENHA
Formatech Gesellschaft fur Maschinenhandel und Service mbH
L Schuler GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by FORMATECH GES fur MASCHINENHA, Formatech Gesellschaft fur Maschinenhandel und Service mbH, L Schuler GmbH filed Critical FORMATECH GES fur MASCHINENHA
Publication of EP0753364A1 publication Critical patent/EP0753364A1/en
Ceased legal-status Critical Current

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Classifications

    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J9/00—Forging presses
    • B21J9/10—Drives for forging presses
    • B21J9/18—Drives for forging presses operated by making use of gearing mechanisms, e.g. levers, spindles, crankshafts, eccentrics, toggle-levers, rack bars

Definitions

  • the invention relates to a multi-stage press for solid forming with a forming device and an associated transport device for the workpieces to be formed.
  • Multi-stage presses of this type are known in practice, in which a single drive device drives both the forming device and the associated transport device.
  • the control of the different time sequences of the movements of the forming device and the transport device is realized mechanically in such multi-stage presses by means of complicated gears and with mechanical curves.
  • the design of such gears is very cumbersome. If workpieces other than those originally intended are to be pressed with such a multi-stage press, the adaptation of the transport device to changed cycle times requires a complicated conversion of the transmission.
  • the curves have to be loosened by hand, rotated by a certain angle, in some cases even exchanged and tightened again. After a few trial pressings, readjustment may be necessary in which the the above procedure must be repeated. This leads to considerable loss of time when converting such presses.
  • the object of the invention is to provide a multi-stage press of the type described at the outset, which can be easily adapted to the pressing of other workpieces without complicated gear structure and with little expenditure of time.
  • the forming device and the transport device have separate drive devices, the drive device of the transport device being controlled by a signal transmitter which determines the respective position of the forming device and which, for. B. can be an absolute encoder or incremental encoder is controlled.
  • the drive device of the transport device is controlled directly electrically or electronically, the output signal of the signal transmitter of the forming device serving as the input signal for the control. This eliminates the need for a complicated transmission. If the multi-stage press is to be adapted to another workpiece to be formed, it is only necessary to intervene in the control of the drive device of the transport device. Time-consuming manual changes are no longer necessary.
  • Another important advantage of this multi-stage press according to the invention is that the signal conversion function of the drive device of the transport device belonging to a specific workpiece can be stored in the form of a program which, if this workpiece is to be pressed again later, only has to be called up.
  • the signal conversion function is to be understood as the systematics of a position of the shaping device transmitted by the signal transmitter of the shaping device assigns a specific position to the transport device.
  • a preferred embodiment of the invention has a signal transmitter which determines the respective position of the transport device, as well as a balancing device and a disconnection device connected to it.
  • the adjustment device is located as a coupling element between the signal transmitters of the transport device and the shaping device, compares the values emitted by them and determines a difference value. As soon as this difference value exceeds a predetermined target value, the adjustment device switches off the multi-stage press. In addition, if the difference value exceeds the target value, the switch-off device can also cause the transport device to be moved out of the forming zone. If there is an error in the control of the transport device, the mechanisms just described prevent the forming device from moving into the forming area as long as the transport device is still in this area.
  • the transport device of the multi-stage press can have transport arms with grippers mounted thereon, the transport arms and the grippers having separate drive devices. This makes it even easier to control the movement.
  • the transport arms of the transport device are preferably pivotally mounted on at least two motor-driven levers, the levers executing circular segment movements for moving the transport arms back and forth. In this way, the transport arms are automatically moved out of the forming zone and into the latter again after the forming has been carried out.
  • the levers can be coupled to one another by means of gears, toothed racks or the like, thereby preventing the transport arms from turning over.
  • the transport arms and / or grippers can in a multi-stage press according to the invention, for. B. driven by electric motors, hydraulic motors, pneumatic or hydraulic cylinders.
  • FIG. 1 shows a multi-stage press with a machine body 1, on which a drive motor 2 is attached.
  • the drive motor 2 drives a flywheel 4 via a belt 3, which is connected to a drive gear 6 via a shaft 5 which can be seen in FIG. 2.
  • the drive gear 6 meshes with an output gear 7, which in turn moves a connecting rod 9 via a crankshaft 8 connected to it, as a result of which a press slide 10 connected to the connecting rod 9, which is guided in rails 11 on the upper and lower sides, is moved to and fro.
  • press slide 10 there are press rams 12, the workpieces 13 to be deformed against the press rams 12, which are inserted into a die block 14 Press dies 15 and thereby deform workpieces 13.
  • the multi-stage press In order to transport the workpieces 13 from one press stage to the next press stage, the multi-stage press has a transport device with a transport housing 16 and a plurality of transport arms 17 arranged thereon. Each transport arm 17 is pivotally mounted on two levers 18. Each transport arm 17 is assigned a transfer motor 19 which moves the transport arm 17 into and out of the forming zone via the levers 18. The transport arms 17 hold the workpieces 13 by means of grippers 20. For the opening and closing of the grippers 20, a gripper motor 21 attached to the transport housing 16 is assigned to each transport arm 17.
  • the transfer motors 19 and gripper motors 21 are connected via control cables 22 to a balancing device 23 attached to the machine body 1.
  • the balancing device 23 receives the signals emitted by a signal transmitter 25 connected to the crankshaft 8 via a signal cable 24 and thus determines the respective position of the press slide 10.
  • FIG. 3 clearly shows the transport arms 17 mounted on the levers 18 with workpieces 13 held in the grippers 20.
  • the two levers 18 of each transport arm 17 are coupled to one another via gear wheels 26.
  • the grippers 20 are opened and closed via a coupling linkage 27 connected to the gripper motor 21, which in turn drives a curve 28, which acts on the two pliers of the gripper 20 via a plunger 30 provided with a roller 29 at its end facing the curve 28 .

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Press Drives And Press Lines (AREA)

Abstract

The multistage press for forming massive workpieces comprises a forming unit and an associated transport unit for the workpieces to be formed. The improvement is that forming and transport units are provided with separate drives (2, 21), and that the drive (21) of the transport unit is controlled by a signal from a sensor (25) indicating the current position of the forming unit.

Description

Die Erfindung betrifft eine Mehrstufenpresse für die Massivumformung mit einer Umformeinrichtung und einer zugehörigen Transportvorrichtung für die umzuformenden Werkstücke.The invention relates to a multi-stage press for solid forming with a forming device and an associated transport device for the workpieces to be formed.

Aus der Praxis sind derartige Mehrstufenpressen bekannt, bei denen eine einzige Antriebseinrichtung sowohl die Umformeinrichtung als auch die zugehörige Transportvorrichtung antreibt. Die Steuerung der unterschiedlichen zeitlichen Abläufe der Bewegungen der Umformeinrichtung und der Transportvorrichtung ist bei derartigen Mehrstufenpressen mechanisch durch komplizierte Getriebe und mit mechanischen Kurven verwirklicht. Die Auslegung solcher Getriebe ist jedoch sehr umständlich. Sollen mit einer solchen Mehrstufenpresse andere Werkstücke als die ursprünglich vorgesehenen gepreßt werden, so erfordert die Anpassung der Transportvorrichtung an veränderte Taktzeiten eine komplizierte Umrüstung des Getriebes. Dabei müssen die Kurven von Hand gelöst, um einen bestimmten Winkel verdreht, in manchen Fällen sogar ausgetauscht und wieder angezogen werden. Nach einigen Probepressungen ist gegebenenfalls noch eine Nachjustierung notwendig, bei der das obige Verfahren wiederholt werden muß. Dies führt zu erheblichen Zeitverlusten bei der Umstellung solcher Pressen.Multi-stage presses of this type are known in practice, in which a single drive device drives both the forming device and the associated transport device. The control of the different time sequences of the movements of the forming device and the transport device is realized mechanically in such multi-stage presses by means of complicated gears and with mechanical curves. The design of such gears is very cumbersome. If workpieces other than those originally intended are to be pressed with such a multi-stage press, the adaptation of the transport device to changed cycle times requires a complicated conversion of the transmission. The curves have to be loosened by hand, rotated by a certain angle, in some cases even exchanged and tightened again. After a few trial pressings, readjustment may be necessary in which the the above procedure must be repeated. This leads to considerable loss of time when converting such presses.

Aufgabe der Erfindung ist es, eine Mehrstufenpresse der eingangs beschriebenen Gattung anzugeben, die ohne komplizierten Getriebeaufbau einfach und mit geringem Zeitaufwand an die Pressung anderer Werkstücke anpassbar ist.The object of the invention is to provide a multi-stage press of the type described at the outset, which can be easily adapted to the pressing of other workpieces without complicated gear structure and with little expenditure of time.

Diese Aufgabe wird dadurch gelöst, daß die Umformeinrichtung und die Transportvorrichtung getrennte Antriebseinrichtungen aufweisen, wobei die Antriebseinrichtung der Transportvorrichtung von einem die jeweilige Position der Umformeinrichtung feststellenden Signalgeber, der z. B. ein Absolutgeber oder Inkrementalgeber sein kann, gesteuert wird. Bei derartigen Mehrstufenpressen wird die Antriebseinrichtung der Transportvorrichtung direkt elektrisch bzw. elektronisch angesteuert, wobei als Eingangssignal für die Steuerung das Ausgangssignal des Signalgebers der Umformeinrichtung dient. Hierdurch erübrigt sich ein kompliziertes Getriebe. Soll die Mehrstufenpresse an ein anderes umzuformendes Werkstück angepaßt werden, muß lediglich in die Steuerung der Antriebseinrichtung der Transportvorrichtung eingegriffen werden. Zeitraubende Umstellungen per Hand sind nicht mehr notwendig. Ein weiterer wesentlicher Vorteil dieser erfindungsgemäßen Mehrstufenpresse ist, daß die zu einem bestimmten Werkstück gehörende Signalumwandlungsfunktion der Antriebseinrichtung der Transportvorrichtung in Form eines Programmes abgelegt werden kann, das, sofern dieses Werkstück später wieder gepreßt werden soll, lediglich abgerufen zu werden braucht. Unter Signalumwandlungsfunktion ist dabei die Systematik zu verstehen, die einer durch den Signalgeber der Umformeinrichtung übermittelten Position der Umformeinrichtung eine bestimmte Position der Transportvorrichtung zuordnet.This object is achieved in that the forming device and the transport device have separate drive devices, the drive device of the transport device being controlled by a signal transmitter which determines the respective position of the forming device and which, for. B. can be an absolute encoder or incremental encoder is controlled. In such multi-stage presses, the drive device of the transport device is controlled directly electrically or electronically, the output signal of the signal transmitter of the forming device serving as the input signal for the control. This eliminates the need for a complicated transmission. If the multi-stage press is to be adapted to another workpiece to be formed, it is only necessary to intervene in the control of the drive device of the transport device. Time-consuming manual changes are no longer necessary. Another important advantage of this multi-stage press according to the invention is that the signal conversion function of the drive device of the transport device belonging to a specific workpiece can be stored in the form of a program which, if this workpiece is to be pressed again later, only has to be called up. The signal conversion function is to be understood as the systematics of a position of the shaping device transmitted by the signal transmitter of the shaping device assigns a specific position to the transport device.

Eine bevorzugte Ausführung der Erfindung weist einen die jeweilige Position der Transportvorrichtung feststellenden Signalgeber sowie eine Abgleicheinrichtung und eine daran angeschlossene Abschalteinrichtung auf. Die Abgleicheinrichtung befindet sich als Kopplungsglied zwischen den Signalgebern der Transportvorrichtung und der Umformeinrichtung, vergleicht die von diesen ausgesandten Werte und ermittelt einen Differenzwert. Sobald dieser Differenzwert einen vorgegebenen Sollwert überschreitet, schaltet die Abgleicheinrichtung die Mehrstufenpresse ab. Zusätzlich kann die Abschalteinrichtung, falls der Differenzwert den Sollwert überschreitet, auch veranlassen, daß die Transportvorrichtung aus der Umformzone herausbewegt wird. Sollte ein Fehler in der Steuerung der Transportvorrichtung vorliegen, verhindern die soeben beschriebenen Mechanismen, daß sich die Umformeinrichtung in den Umformbereich bewegt, solange sich die Transportvorrichtung noch in diesem Bereich befindet.A preferred embodiment of the invention has a signal transmitter which determines the respective position of the transport device, as well as a balancing device and a disconnection device connected to it. The adjustment device is located as a coupling element between the signal transmitters of the transport device and the shaping device, compares the values emitted by them and determines a difference value. As soon as this difference value exceeds a predetermined target value, the adjustment device switches off the multi-stage press. In addition, if the difference value exceeds the target value, the switch-off device can also cause the transport device to be moved out of the forming zone. If there is an error in the control of the transport device, the mechanisms just described prevent the forming device from moving into the forming area as long as the transport device is still in this area.

Erfindungsgemäß kann die Transportvorrichtung der Mehrstufenpresse Transportarme mit darauf angebrachten Greifern aufweisen, wobei die Transportarme und die Greifer getrennte Antriebseinrichtungen haben. Hierdurch wird die Steuerung der Bewegung noch weiter erleichtert. Die Transportarme der Transportvorrichtung sind vorzugsweise auf mindestens zwei motorisch angetriebenen Hebeln schwenkbar gelagert, wobei die Hebel zum Hin- und Herbewegen der Transportarme Kreissegmentbewegungen ausführen. Die Transportarme werden so automatisch aus der Umformzone heraus und nach erfolgter Umformung wieder in diese hineinbewegt.According to the invention, the transport device of the multi-stage press can have transport arms with grippers mounted thereon, the transport arms and the grippers having separate drive devices. This makes it even easier to control the movement. The transport arms of the transport device are preferably pivotally mounted on at least two motor-driven levers, the levers executing circular segment movements for moving the transport arms back and forth. In this way, the transport arms are automatically moved out of the forming zone and into the latter again after the forming has been carried out.

Dabei können die Hebel untereinander mittels Zahnräder, Zahnstangen oder dergleichen gekoppelt sein, wodurch ein Umschlagen der Transportarme verhindert wird.The levers can be coupled to one another by means of gears, toothed racks or the like, thereby preventing the transport arms from turning over.

Die Transportarme und/oder Greifer können bei einer erfindungsgemäßen Mehrstufenpresse z. B. durch Elektromotoren, Hydraulikmotoren, Pneumatik- oder Hydraulikzylinder angetrieben werden.The transport arms and / or grippers can in a multi-stage press according to the invention, for. B. driven by electric motors, hydraulic motors, pneumatic or hydraulic cylinders.

Im folgenden wird ein in der Zeichnung dargestelltes Ausführungsbeispiel der Erfindung erläutert; es zeigen:

Fig. 1
eine Vorderansicht einer Mehrstufenpresse,
Fig. 2
einen Schnitt in Richtung II-II durch den Gegenstand nach Fig. 1,
Fig. 3
einen vergrößerten Schnitt in Richtung III-III durch den Gegenstand nach Fig. 1.
In the following an embodiment of the invention shown in the drawing is explained; show it:
Fig. 1
a front view of a multi-stage press,
Fig. 2
2 shows a section in the direction II-II through the object according to FIG. 1,
Fig. 3
an enlarged section in the direction III-III through the object of FIG. 1st

In Fig. 1 ist eine Mehrstufenpresse mit einem Maschinenkörper 1 erkennbar, worauf ein Antriebsmotor 2 angebracht ist. Der Antriebsmotor 2 treibt über einen Riemen 3 ein Schwungrad 4 an, das über eine in Fig. 2 erkennbare Welle 5 mit einem Antriebszahnrad 6 verbunden ist. Das Antriebszahnrad 6 kämmt mit einem Abtriebszahnrad 7, welches wiederum über eine mit ihm verbundene Kurbelwelle 8 ein Pleuel 9 bewegt, wodurch ein mit dem Pleuel 9 verbundener Preßschlitten 10, der ober- und unterseitig in Schienen 11 geführt ist, hin- und herbewegt wird.1 shows a multi-stage press with a machine body 1, on which a drive motor 2 is attached. The drive motor 2 drives a flywheel 4 via a belt 3, which is connected to a drive gear 6 via a shaft 5 which can be seen in FIG. 2. The drive gear 6 meshes with an output gear 7, which in turn moves a connecting rod 9 via a crankshaft 8 connected to it, as a result of which a press slide 10 connected to the connecting rod 9, which is guided in rails 11 on the upper and lower sides, is moved to and fro.

An dem Preßschlitten 10 befinden sich Preßstempel 12, die zu verformende Werkstücke 13 gegen den Preßstempeln 12 gegenüberliegende, in einen Matrizenblock 14 eingesetzte Matrizen 15 pressen und die Werkstücke 13 dadurch verformen.On the press slide 10 there are press rams 12, the workpieces 13 to be deformed against the press rams 12, which are inserted into a die block 14 Press dies 15 and thereby deform workpieces 13.

Um die Werkstücke 13 von einer Pressstufe zur nächsten Pressstufe zu transportieren, weist die Mehrstufenpresse eine Transportvorrichtung mit einem Transportgehäuse 16 und mehreren darauf angeordneten Transportarmen 17 auf. Jeder Transportarm 17 ist auf zwei Hebeln 18 schwenkbar gelagert. Dabei ist jedem Transportarm 17 ein Transfermotor 19 zugeordnet, der den Transportarm 17 über die Hebel 18 in die Umformzone hinein- und herausbewegt. Die Transportarme 17 halten die Werkstücke 13 mittels Greifern 20. Für das Öffnen und Schließen der Greifer 20 ist jedem Transportarm 17 ein an dem Transportgehäuse 16 befestigter Greifermotor 21 zugeordnet.In order to transport the workpieces 13 from one press stage to the next press stage, the multi-stage press has a transport device with a transport housing 16 and a plurality of transport arms 17 arranged thereon. Each transport arm 17 is pivotally mounted on two levers 18. Each transport arm 17 is assigned a transfer motor 19 which moves the transport arm 17 into and out of the forming zone via the levers 18. The transport arms 17 hold the workpieces 13 by means of grippers 20. For the opening and closing of the grippers 20, a gripper motor 21 attached to the transport housing 16 is assigned to each transport arm 17.

Die Transfermotoren 19 und Greifermotoren 21 sind über Steuerkabel 22 mit einer am Maschinenkörper 1 angebrachten Abgleicheinrichtung 23 verbunden. Die Abgleicheinrichtung 23 empfängt über ein Signalkabel 24 die von einem mit der Kurbelwelle 8 verbundenen Signalgeber 25 ausgesandten Signale und ermittelt so die jeweilige Position des Preßschlittens 10.The transfer motors 19 and gripper motors 21 are connected via control cables 22 to a balancing device 23 attached to the machine body 1. The balancing device 23 receives the signals emitted by a signal transmitter 25 connected to the crankshaft 8 via a signal cable 24 and thus determines the respective position of the press slide 10.

In Fig. 3 sind deutlich die auf den Hebeln 18 gelagerten Transportarme 17 mit in den Greifern 20 gehaltenen Werkstücken 13 zu erkennen. Die beiden Hebel 18 jedes Transportarmes 17 sind über Zahnräder 26 miteinander gekoppelt. Das Öffnen und Schließen der Greifer 20 erfolgt über ein mit dem Greifermotor 21 verbundenes Koppelgestänge 27, das wiederum eine Kurve 28 antreibt, die über einen an seinem der Kurve 28 zugewandten Ende mit einer Rolle 29 versehenen Stößeln 30 auf die beiden Zangen des Greifers 20 wirkt.3 clearly shows the transport arms 17 mounted on the levers 18 with workpieces 13 held in the grippers 20. The two levers 18 of each transport arm 17 are coupled to one another via gear wheels 26. The grippers 20 are opened and closed via a coupling linkage 27 connected to the gripper motor 21, which in turn drives a curve 28, which acts on the two pliers of the gripper 20 via a plunger 30 provided with a roller 29 at its end facing the curve 28 .

Claims (11)

Mehrstufenpresse für die Massivumformung mit einer Umformeinrichtung und einer zugehörigen Transportvorrichtung für die umzuformenden Werkstücke, dadurch gekennzeichnet, daß die Umformeinrichtung und die Transportvorrichtung getrennte Antriebseinrichtungen (2, 19, 21) aufweisen, wobei die Antriebseinrichtung (19, 21) der Transportvorrichtung von einem die jeweilige Position der Umformeinrichtung feststellenden Signalgeber (25) gesteuert wird.Multi-stage press for massive forming with a forming device and an associated transport device for the workpieces to be formed, characterized in that the forming device and the transport device have separate drive devices (2, 19, 21), the drive device (19, 21) of the transport device changing the respective one Position of the forming device determining signal transmitter (25) is controlled. Mehrstufenpresse nach Anspruch 1, dadurch gekennzeichnet, daß der Signalgeber (25) ein Absolutgeber ist.Multi-stage press according to claim 1, characterized in that the signal transmitter (25) is an absolute transmitter. Mehrstufenpresse nach Anspruch 1, dadurch gekennzeichnet, daß der Signalgeber (25) ein Inkrementalgeber ist.Multi-stage press according to claim 1, characterized in that the signal transmitter (25) is an incremental transmitter. Mehrstufenpresse nach einem der Ansprüche 1 bis 3, gekennzeichnet durch einen die jeweilige Position der Transportvorrichtung feststellenden, über eine Abgleicheinrichtung (23) mit dem Signalgeber (25) der Umformeinrichtung gekoppelten Signalgeber sowie eine an die Abgleicheinrichtung (23) angeschlossene Abschalteinrichtung, die die Mehrstufenpresse abschaltet, sobald der von der Abgleicheinrichtung (23) ermittelte Differenzwert einen vorgegebenen Sollwert überschreitet.Multi-stage press according to one of Claims 1 to 3, characterized by a signal transmitter which determines the respective position of the transport device and is coupled to the signal transmitter (25) of the shaping device via a matching device (23) and a shutdown device which is connected to the matching device (23) and which switches off the multi-stage press as soon as the difference value determined by the adjustment device (23) exceeds a predetermined target value. Mehrstufenpresse nach Anspruch 4, dadurch gekennzeichnet, daß die Abschalteinrichtung (23) die Transportvorrichtung aus der Umformzone herausbewegt, sobald der von der Abgleicheinrichtung (23) ermittelte Differenzwert einen vorgegebenen Sollwert überschreitet.Multi-stage press according to claim 4, characterized in that the shutdown device (23) moves the transport device out of the forming zone as soon as the difference value determined by the adjustment device (23) exceeds a predetermined target value. Mehrstufenpresse nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die Transportvorrichtung Transportarme (17) mit darauf angebrachten Greifern (20) aufweist, wobei die Transportarme (17) und die Greifer (20) getrennte Antriebseinrichtungen (19, 21) aufweisen.Multi-stage press according to one of claims 1 to 5, characterized in that the transport device has transport arms (17) with grippers (20) mounted thereon, the transport arms (17) and the grippers (20) having separate drive devices (19, 21). Mehrstufenpresse nach Anspruch 6, dadurch gekennzeichnet, daß die Transportarme (17) zum Hin- und Herbewegen zwischen zwei Ausgangsstellungen auf zumindest zwei motorisch angetriebenen, Kreissegmentbewegungen ausführenden Hebeln (18) schwenkbar gelagert sind.Multi-stage press according to Claim 6, characterized in that the transport arms (17) are pivotably mounted for moving back and forth between two starting positions on at least two motor-driven levers (18) which execute circular segment movements. Mehrstufenpresse nach Anspruch 7, dadurch gekennzeichnet, daß die Hebel (18) untereinander mittels Zahnräder (26), Zahnstangen oder dergleichen gekoppelt sind.Multi-stage press according to claim 7, characterized in that the levers (18) are coupled to one another by means of gear wheels (26), toothed racks or the like. Mehrstufenpresse nach einem der Ansprüche 6 bis 8, dadurch gekennzeichnet, daß die Antriebseinrichtungen (19, 21) der Transportarme und/oder Greifer Elektromotoren sind.Multi-stage press according to one of claims 6 to 8, characterized in that the drive devices (19, 21) of the transport arms and / or grippers are electric motors. Mehrstufenpresse nach einem der Ansprüche 6 bis 8, dadurch gekennzeichnet, daß die Antriebseinrichtungen (19, 21) der Transportarme und/oder Greifer Hydraulikmotoren sind.Multi-stage press according to one of claims 6 to 8, characterized in that the drive devices (19, 21) of the transport arms and / or grippers are hydraulic motors. Mehrstufenpresse nach einem der Ansprüche 6 bis 8, dadurch gekennzeichnet, daß die Antriebseinrichtungen (19, 21) der Transportarme und/oder Greifer Pneumatik- oder Hydraulikzylinder sind.Multi-stage press according to one of claims 6 to 8, characterized in that the drive devices (19, 21) the transport arms and / or grippers are pneumatic or hydraulic cylinders.
EP96111004A 1995-07-14 1996-07-09 Multi-stage press for forms Ceased EP0753364A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE29511367U 1995-07-14
DE29511367U DE29511367U1 (en) 1995-07-14 1995-07-14 Multi-stage press for massive forming

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EP0753364A1 true EP0753364A1 (en) 1997-01-15

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US4387632A (en) * 1981-07-20 1983-06-14 Danly Machine Corporation Control system for synchronizing power presses and associated feed mechanism with interlock features
US4408281A (en) * 1981-07-27 1983-10-04 Danly Machine Corporation Control system for synchronizing multiple presses in a line
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