EP0041633B1 - Metal-forming press for the production of pressed pieces - Google Patents

Metal-forming press for the production of pressed pieces Download PDF

Info

Publication number
EP0041633B1
EP0041633B1 EP81103865A EP81103865A EP0041633B1 EP 0041633 B1 EP0041633 B1 EP 0041633B1 EP 81103865 A EP81103865 A EP 81103865A EP 81103865 A EP81103865 A EP 81103865A EP 0041633 B1 EP0041633 B1 EP 0041633B1
Authority
EP
European Patent Office
Prior art keywords
metal
forming press
ejector
lever
driving lever
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP81103865A
Other languages
German (de)
French (fr)
Other versions
EP0041633A3 (en
EP0041633A2 (en
Inventor
Walter Flamme
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.)
L Schuler GmbH
Original Assignee
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 L Schuler GmbH filed Critical L Schuler GmbH
Priority to AT81103865T priority Critical patent/ATE9204T1/en
Publication of EP0041633A2 publication Critical patent/EP0041633A2/en
Publication of EP0041633A3 publication Critical patent/EP0041633A3/en
Application granted granted Critical
Publication of EP0041633B1 publication Critical patent/EP0041633B1/en
Expired legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J13/00—Details of machines for forging, pressing, or hammering
    • B21J13/08—Accessories for handling work or tools
    • B21J13/14—Ejecting devices

Definitions

  • the invention relates to a forming press for the production of pressed parts with at least one ejector device for ejecting the pressed parts from a die, the ejector device as main components having an ejector pin which can be moved into the die and an actuating linkage which has an actuating lever acting on the ejector pin and one connected to the forming press drive has a stationary drive lever and a coupling rod connecting both levers, the drive lever partially having the shape of a circular arc and the coupling rod being articulated via a sliding piece in the region of the circular arc, and actuating lever and drive lever being arranged in such a way that the center point of the circular arc in the maximum ejector stroke The articulation point of the coupling rod is on the operating lever.
  • Ejector devices in forming presses serve to limit the depth of penetration of the pressed part during the pressing in the die and to push the pressed part out of it after the pressing.
  • a reciprocating ejector pin is provided, the movement of which is controlled by an actuating linkage.
  • this actuating linkage consists essentially of an actuating lever designed as an angle lever for the ejector pin, a coupling rod articulated on the actuating lever and a drive lever connected to the coupling rod.
  • This drive lever runs on a cam driven by the press drive and is pivoted back and forth in this way. This pivoting movement is transmitted to the actuating lever by means of the coupling rod, which correspondingly pushes the ejector pin back and forth in time with the forming press.
  • the stroke of the ejector pin In order to change the depth of penetration in the die for different pressed parts, the stroke of the ejector pin must be adjustable in such a way that the position of the maximum ejector stroke remains the same and only the maximum return stroke changes.
  • the connection between the coupling rod and the drive lever is designed so that the lever ratios can be varied.
  • the shift takes place via a sliding piece along an arcuate section of the drive lever.
  • Drive lever and operating lever are arranged so that the center of the arc in the position of the maximum ejector stroke is exactly in the articulation of the coupling rod on the operating lever. In this way, the sliding piece can be moved and thus the lever ratios between the coupling rod and the drive lever can be changed without touching the maximum ejector stroke position. Only the length of the return stroke changes.
  • An embodiment of a forming press in which the ejector of the ejector device can be adjusted manually by means of a hand wheel is also known from CH-A-532436. From this, a motorized adjustment drive is also known, by means of which a crosshead participating in the strokes of the tappet via pull rods can be adjusted in its position relative to the tappet. This adjustment thus only indirectly affects the throwing device.
  • the invention has for its object to reduce the time and manpower for adjusting the ejector stroke in forming presses of the type mentioned.
  • a forming press which, according to the invention, is characterized by a motor-adjustable stop pin for the actuating lever, by an adjusting motor arranged on the drive lever for displacing the sliding pieces on the circular arc and by a motor-driven locking device for the sliding piece.
  • the adjustment of the ejector stroke takes place in such a way that the actuating linkage is first brought into the maximum ejector stroke position. Then the locking device for the sliding piece is released and the sliding piece is moved by means of the adjusting motor into the position which results in a maximum return stroke for the ejector pin. The locking device is then fixed again.
  • the stop pin which limits the maximum return stroke and against which the ejector pin can be supported during pressing, is brought into the desired position by a motor. Then the actuating linkage is moved until it rests on the stop pin. If the latter is not in the maximum return stroke position, the drive lever remains raised from its drive, for example a cam disk. In order to bring it back to the system there, the sliding piece is moved by means of the adjusting motor after the locking device has been released again until the drive lever on the drive comes to the system. After fixing the sliding piece is the actuation linkage adjusted to the new ejector stroke.
  • a lifting device for displacing the ejector pin into the position of maximum ejector stroke acts on the actuating linkage.
  • This lifting device takes over the lifting of the drive lever from the drive to the maximum ejector position. An actuation of the forming press drive is then no longer necessary.
  • the lifting device is expediently articulated on the drive lever.
  • it can be designed as a pneumatic pressure cylinder.
  • the invention further provides that the adjusting motor is designed as a pressure cylinder articulated at one end on the drive lever and at the other end on the sliding piece and can thus ensure a displacement of the sliding piece.
  • the adjustment motor can be designed as a hydraulic pressure cylinder.
  • the locking device has a clamping wedge for clamping the sliding piece on the drive lever.
  • the clamping wedge can be detachable or fixable by means of at least one hydraulic cylinder.
  • two hydraulic cylinders are expediently provided for this.
  • a proximity switch is provided which switches off the adjusting motor when the drive lever is in contact with the drive, the drive advantageously being effected via a cam disk. In this way it is ensured that, after the adjustment has been made, there is contact with the cam disk.
  • Figures 1 and 2 represent a sectional view through the machine frame 1 of a forming press.
  • a die 2 is used, which consists of a die sleeve 3 and a core part 4.
  • a through bore 5 is provided, which determines the shape of the pressed part and in which the front end of an evaluation pin 6 is guided.
  • This ejector pin 6 is guided telescopically with its rear part and rests with its back against an actuating lever 7 designed as a toggle lever.
  • the actuating lever 7 has an overload safety device 8, on which the ejector pin 6 is in direct contact and which is fixed at one end by a retaining pin 9 and at the other end by a tear screw 10, which breaks at a certain critical load and thus the entire drive for the ejector pin 6 against overload protects.
  • the actuating lever 7 is connected in an articulated manner to a drive lever 12 via a coupling rod 11.
  • This drive lever 12 has a circular section 13 on which the articulation of the coupling rod 11, which is designed as a sliding piece 14, can be displaced.
  • the sliding piece 14 comprises the drive lever 12 and has a locking device 15 which consists of a clamping piece 16 movable vertically to the drive lever 12, a clamping wedge 17 with pressure cylinders 18, 19 arranged on both sides thereof. Depending on the pressurization of one or the other pressure cylinder 18, 19, the locking device 14 can be released or fixed by moving the clamping wedge 17.
  • the sliding piece 14 is displaced by means of a two-stage pressure cylinder 20, which is articulated on one side on the sliding piece 14 and on the other side on a lever arm 21 of the drive lever 12.
  • the drive lever 12 has a roller 22 at its straight end, which runs on a cam disk 23, which in turn is connected to the press drive.
  • a pneumatic cylinder 24 also acts on the drive lever 12, the other end of which is articulated on the machine frame 1. With this pneumatic cylinder 24, the drive lever 12 can be lifted off the cam disk 23 until the ejector pin 6 has reached the maximum ejector stroke position.
  • a stop pin 25 which is arranged coaxially with the ejector pin 6 and which is adjustable in the axial direction.
  • a spindle drive 26 is provided, as is known in detail from DE-B2-27 40 616, so that its detailed description is omitted here.
  • the drive lever 12 then assumes a position in which the coupling rod 11 is perpendicular to the circular section 13, i. H. the articulation point of the coupling rod 11 on the actuating lever 7 forms the center point for the circular arc of the section 13.
  • the sliding piece 14 can now be moved on the section 13 without changing anything in the position of the ejector pin 6. This is done by means of the pressure cylinder 20 after loosening the clamping wedge 17, the sliding piece 14 first being moved into the outermost position at the free end of the section 13. It is the position in which due to the then given lever ratios, the return stroke of the ejector pin 6 is greatest.
  • the stop pin 25, which limits the return stroke, can be brought into the desired position by means of the spindle drive 26. Then the pneumatic cylinder 24 is again acted upon in the opposite direction, so that the drive lever 12 with its roller 22 pivots again in the direction of the cam disk 23. As a result, the drive lever 7 also pivots back, namely until its back abuts the stop pin 25. The ejector pin 6 then also goes back.
  • the roller 22 on the drive lever 12 does not come into contact with the cam disk 23, since the sliding piece 14 is in its outermost position.
  • the locking device 15 is then released and the sliding piece 14 is displaced by means of the pressure cylinder 20 in the direction of the bearing point of the drive lever 12, the drive lever 12 pivoting with the roller 22 in the direction of the cam disk 23 due to the then changing lever ratios, while the actuating lever 7 remains in its contact position on the stop pin 25.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)
  • Mounting, Exchange, And Manufacturing Of Dies (AREA)
  • Treatments Of Macromolecular Shaped Articles (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Sampling And Sample Adjustment (AREA)
  • Press Drives And Press Lines (AREA)

Abstract

1. Metal-forming press for the production of pressed parts, this press possessing at least one ejector arrangement for ejecting the pressed parts from a female die (2), the principal components of this ejector arrangement being an ejector pin (6) which can be moved into the female die (2) and an actuating link-system which comprises an actuating lever (7) for applying a force to the ejector pin (6), a driving lever (12), connected to the drive mechanism of the metal-forming press, and a connecting rod (11), connecting the two levers (7, 12), the driving lever (12) having, in part, the shape of an arc (13) of a circle, and the coupling rod (11) being pivotably attached, in the region of the arc (13) of a circle, via a sliding piece (14), while the actuating lever (7) and the driving lever (12) are arranged in a manner such that when the ejector is at its full stroke, the centre of the arc (13) of a circle coincides with the point at which the coupling rod (11) is pivotably attached to the actuating lever (7), characterized by a stop-pin (25) which can be adjusted by means of a motor and acts as a stop for the actuating lever (7), by an adjusting motor (20) which is installed on the driving lever (12) for the purpose of shifting the sliding piece (14) on the arc (13) of a circle, and by a power-driven locking device (15) for the sliding piece (14).

Description

Die Erfindung betrifft eine Umformpresse zur Herstellung von Pressteilen mit zumindest einer Auswerfereinrichtung zum Auswerfen der Pressteile aus einer Matrize, wobei die Auswerfereinrichtung als Hauptbestandteile einen in die Matrize einfahrbaren Auswerferbolzen und ein Betätigungsgestänge aufweist, das einen den Auswerferbolzen beaufschlagenden Betätigungshebel, einen mit dem Umformpressenantrieb in Verbindung stehenden Antriebshebel und eine beide Hebel verbindende Koppelstange aufweist, wobei der Antriebshebel teilweise den Verlauf eines Kreisbogens hat und die Koppelstange über ein Schiebestück im Bereich des Kreisbogens angelenkt ist sowie Betätigungshebel und Antriebshebel in der Weise angeordnet sind, daß bei maximalem Auswerferhub der Mittelpunkt des Kreisbogens im Anlenkpunkt der Koppelstange am Betätigungshebel liegt.The invention relates to a forming press for the production of pressed parts with at least one ejector device for ejecting the pressed parts from a die, the ejector device as main components having an ejector pin which can be moved into the die and an actuating linkage which has an actuating lever acting on the ejector pin and one connected to the forming press drive has a stationary drive lever and a coupling rod connecting both levers, the drive lever partially having the shape of a circular arc and the coupling rod being articulated via a sliding piece in the region of the circular arc, and actuating lever and drive lever being arranged in such a way that the center point of the circular arc in the maximum ejector stroke The articulation point of the coupling rod is on the operating lever.

Auswerfereinrichtungen in Umformpressen dienen dazu, die Eindringtiefe des Pressteils während der Verpressung in der Matrize nach hinten zu begrenzen und das Pressteil nach der Verpressung aus ihr herauszustoßen. Hierzu ist ein hin- und herbewegbarer Auswerferbolzen vorgesehen, dessen Bewegung über ein Betätigungsgestänge gesteuert wird.Ejector devices in forming presses serve to limit the depth of penetration of the pressed part during the pressing in the die and to push the pressed part out of it after the pressing. For this purpose, a reciprocating ejector pin is provided, the movement of which is controlled by an actuating linkage.

Nach einer bekannten Ausführungsform besteht dieses Betätigungsgestänge im wesentlichen aus einem als Winkelhebel ausgebildeten Betätigungshebel für den Auswerferbolzen, einer an dem Betätigungshebel angelenkten Koppelstange und einem mit der Koppelstange verbundenen Antriebshebel. Dieser Antriebshebel läuft auf einer vom Pressenantrieb angetriebenen Kurvenscheibe und wird auf diese Weise hin- und hergeschwenkt. Diese Schwenkbewegung wird mittels der Koppelstange auf den Betätigungshebei übertragen, der den Auswerferbolzen im Takt der Umformpresse entsprechend hin- und herschiebt.According to a known embodiment, this actuating linkage consists essentially of an actuating lever designed as an angle lever for the ejector pin, a coupling rod articulated on the actuating lever and a drive lever connected to the coupling rod. This drive lever runs on a cam driven by the press drive and is pivoted back and forth in this way. This pivoting movement is transmitted to the actuating lever by means of the coupling rod, which correspondingly pushes the ejector pin back and forth in time with the forming press.

Um die Eindringtiefe in der Matrize für verschiedene Pressteile zu verändern, muß der Hub des Auswerferbolzens einstellbar sein, und zwar derart, daß die Stellung des maximalen Auswerferhubes dieselbe bleibt und sich nur der maximale Rückhub ändert. Hierfür ist die Verbindung zwischen Koppelstange und Antriebshebel verschiebbar gestaltet, so daß die Hebelverhältnisse variiert werden können.In order to change the depth of penetration in the die for different pressed parts, the stroke of the ejector pin must be adjustable in such a way that the position of the maximum ejector stroke remains the same and only the maximum return stroke changes. For this purpose, the connection between the coupling rod and the drive lever is designed so that the lever ratios can be varied.

Die Verschiebung geschieht dabei über ein Schiebestück längs eines kreisbogenförmig gestalteten Teilabschnittes des Antriebshebels. Antriebshebel und Betätigungshebel sind so zueinander angeordnet, daß der Mittelpunkt des Kreisbogens in der Stellung des maximalen Auswerferhubes genau in der Anlenkung der Koppelstange am Betätigungshebel liegt. Auf diese Weise kann des Schiebestück bewegt und damit die Hebelverhältnisse zwischen Koppelstange und Antriebshebel geändert werden, ohne daß dabei die maximale Auswerferhubstellung berührt wird. Es ändert sich nur die Länge des Rückhubes.The shift takes place via a sliding piece along an arcuate section of the drive lever. Drive lever and operating lever are arranged so that the center of the arc in the position of the maximum ejector stroke is exactly in the articulation of the coupling rod on the operating lever. In this way, the sliding piece can be moved and thus the lever ratios between the coupling rod and the drive lever can be changed without touching the maximum ejector stroke position. Only the length of the return stroke changes.

Die vorstehend beschriebene Verstellung des Auswerferhubes geschah bisher ausschließlich von Hand. Dies war außerordentlich umständlich und erforderte trotz des Einsatzes von zwei Personen viel Zeit.The adjustment of the ejector stroke described above has previously only been done by hand. This was extremely cumbersome and required a lot of time despite the efforts of two people.

Eine Ausführungsform einer Umformpresse, bei der der Auswerfer der Auswerfereinrichtung von Hand mittels eines Handrades verstellt werden kann, ist auch aus der CH-A-532436 bekannt. Daraus ist überdies ein motorischer Verstellantrieb bekannt, durch den ein an den Hüben des Stößels über Zugstangen teilnehmendes Querhaupt in seiner Lage gegenüber dem Stößel verstellt werden kann. Diese Verstellung beeinflußt damit nur mittelbar die Aufwerfereinrichtung.An embodiment of a forming press in which the ejector of the ejector device can be adjusted manually by means of a hand wheel is also known from CH-A-532436. From this, a motorized adjustment drive is also known, by means of which a crosshead participating in the strokes of the tappet via pull rods can be adjusted in its position relative to the tappet. This adjustment thus only indirectly affects the throwing device.

Der Erfindung liegt die Aufgabe zugrunde, den Zeit- und Personalaufwand für die Verstellung des Auswerferhubes bei Umformpressen der eingangs genannten Art zu verringern.The invention has for its object to reduce the time and manpower for adjusting the ejector stroke in forming presses of the type mentioned.

Diese Aufgabe wird durch eine Umformpresse gelöst, die erfindungsgemäß durch einen motorisch verstellbaren Anschlagbolzen für den Betätigungshebel, durch einen am Antriebshebel angeordneten Verstellmotor zur Verschiebung des Schiebestücke auf dem Kreisbogen und durch eine motorisch angetriebene Feststelleinrichtung für das Schiebestück gekennzeichnet ist. Durch diese Ausbildung läßt sich die Verstellung des Auswerferhubes ohne Montagearbeiten schnell und exakt beispielsweise von einem Steuerpult durchführen. Der vermehrte technische Aufwand wird dabei durch die Einsparungen von Personalkostenanteilen und durch die höhere Betriebsbereitschaft der so ausgestatteten Umformpresse mehr als kompensiert.This object is achieved by a forming press which, according to the invention, is characterized by a motor-adjustable stop pin for the actuating lever, by an adjusting motor arranged on the drive lever for displacing the sliding pieces on the circular arc and by a motor-driven locking device for the sliding piece. With this design, the adjustment of the ejector stroke can be carried out quickly and precisely, for example from a control panel, without assembly work. The increased technical effort is more than compensated for by the savings in personnel costs and the higher operational readiness of the forming press equipped in this way.

Die Verstellung des Auswerferhubes geht dabei so vor sich, daß zunächst das Betätigungsgestänge in die maximale Auswerferhubstellung gebracht wird. Dann wird die Feststelleinrichtung für das Schiebestück gelöst und das Schiebestück mittels des Verstellmotors in die Stellung bewegt, die einen maximalen Rückhub für den Auswerferbolzen ergibt. Anschließend wird die Feststelleinrichtung wieder fixiert.The adjustment of the ejector stroke takes place in such a way that the actuating linkage is first brought into the maximum ejector stroke position. Then the locking device for the sliding piece is released and the sliding piece is moved by means of the adjusting motor into the position which results in a maximum return stroke for the ejector pin. The locking device is then fixed again.

Gleichzeitig wird der Anschlagbolzen, der den maximalen Rückhub begrenzt und gegen den sich der Auswerferbolzen bei der Verpressung abstützen kann, motorisch in die gewünschte Stellung gebracht. Dann wird das Betätigungsgestänge soweit bewegt, bis es am Anschlagbolzen anliegt. Sofern dieser sich nicht in der maximalen Rückhubstellung befindet, bleibt der Antriebshebel von seinem Antrieb, beispielsweise einer Nockenscheibe, noch abgehoben. Um ihn dort wieder zur Anlage zu bringen, wird mittels des Verstellmotors das Schiebestück nach erneutem Lösen der Feststelleinrichtung solange verschoben, bis der Antriebshebel an dem Antrieb zur Anlage kommt. Nach Fixierung des Schiebestückes ist dann das Betätigungsgestänge auf den neuen Auswerferhub eingestellt.At the same time, the stop pin, which limits the maximum return stroke and against which the ejector pin can be supported during pressing, is brought into the desired position by a motor. Then the actuating linkage is moved until it rests on the stop pin. If the latter is not in the maximum return stroke position, the drive lever remains raised from its drive, for example a cam disk. In order to bring it back to the system there, the sliding piece is moved by means of the adjusting motor after the locking device has been released again until the drive lever on the drive comes to the system. After fixing the sliding piece is the actuation linkage adjusted to the new ejector stroke.

In Ausbildung der Erfindung ist vorgesehen, daß am Betätigungsgestänge eine Hubeinrichtung zur Verschiebung des Auswerferbolzens in die Stellung maximalen Auswerferhubes angreift. Diese Hubeinrichtung übernimmt das Abheben des Antriebshebels vom Antrieb bis in die maximale Auswerferstellung. Eine Betätigung des Umformpressenantriebes ist dann nicht mehr erforderlich. Zweckmäßigerweise ist die Hubeinrichtung am Antriebshebel angelenkt. Sie kann beispielsweise als Pneumatikdruckzylinder ausgebildet sein.In an embodiment of the invention it is provided that a lifting device for displacing the ejector pin into the position of maximum ejector stroke acts on the actuating linkage. This lifting device takes over the lifting of the drive lever from the drive to the maximum ejector position. An actuation of the forming press drive is then no longer necessary. The lifting device is expediently articulated on the drive lever. For example, it can be designed as a pneumatic pressure cylinder.

Die Erfindung sieht ferner vor, daß der Verstellmotor als einerends am Antriebshebel und andernends am Schiebestück angelenkter Druckzylinder ausgebildet ist und so für eine Verschiebung des Schiebestückes sorgen kann. Der Verstellmotor kann dabei als Hydraulikdruckzylinder ausgebildet sein.The invention further provides that the adjusting motor is designed as a pressure cylinder articulated at one end on the drive lever and at the other end on the sliding piece and can thus ensure a displacement of the sliding piece. The adjustment motor can be designed as a hydraulic pressure cylinder.

Gemäß einem weiteren Merkmal der Erfindung ist vorgesehen, daß die Feststelleinrichtung einen Klemmkeil zur Verklemmung des Schiebestückes am Antriebshebel aufweist. Hierdurch gestaltet sich die Fixierung des Schiebestückes besonders einfach. Der Klemmkeil kann dabei mittels zumindest eines Hydraulikzylinders lös- oder fixierbar sein. Zweckmäßigerweise werden hierfür jedoch zwei Hydraulikzylinder vorgesehen.According to a further feature of the invention, it is provided that the locking device has a clamping wedge for clamping the sliding piece on the drive lever. This makes fixing the sliding piece particularly easy. The clamping wedge can be detachable or fixable by means of at least one hydraulic cylinder. However, two hydraulic cylinders are expediently provided for this.

Schließlich ist gemäß der Erfindung ein Näherungsschalter vorgesehen, der den Verstellmotor bei Anlage des Antriebshebels am Antrieb abstellt, wobei der Antrieb zweckmäßigerweise über eine Nockenscheibe erfolgt. Auf diese Weise ist gesichert, daß nach erfolgter Verstellung eine Anlage an der Nockenscheibe gegeben ist.Finally, according to the invention, a proximity switch is provided which switches off the adjusting motor when the drive lever is in contact with the drive, the drive advantageously being effected via a cam disk. In this way it is ensured that, after the adjustment has been made, there is contact with the cam disk.

In der Zeichnung ist die Erfindung anhand eines Ausführungsbeispiels näher veranschaulicht. Es zeigen :

  • Figur 1 eine Auswerfereinrichtung für eine Umformpresse in maximaler Auswerferstellung und
  • Figur 2 die Auswerfereinrichtung gemäß Figur 1 in Rückhubstellung.
In the drawing, the invention is illustrated in more detail using an exemplary embodiment. Show it :
  • 1 shows an ejector device for a forming press in the maximum ejector position and
  • 2 shows the ejector device according to FIG. 1 in the return stroke position.

Die Figuren 1 und 2 stellen eine Schnittdarstellung durch den Maschinenrahmen 1 einer Umformpresse dar. In diesem Maschinenrahmen 1 ist eine Matrize 2 eingesetzt, die aus einer Matrizenhülse 3 und einem Kernteil 4 besteht. In dem Kernteil 4 ist eine durchgehende Bohrung 5 vorgesehen, die die Formgebung des Preßteiles bestimmt und in der das vordere Ende eines Auswerterbolzens 6 geführt ist. Dieser Auswerferbolzen 6 ist mit seinem hinteren Teil teleskopartig geführt und liegt mit seiner Rückseite an einem als Kniehebel ausgebildeten Betätigungshebel 7 an.Figures 1 and 2 represent a sectional view through the machine frame 1 of a forming press. In this machine frame 1, a die 2 is used, which consists of a die sleeve 3 and a core part 4. In the core part 4, a through bore 5 is provided, which determines the shape of the pressed part and in which the front end of an evaluation pin 6 is guided. This ejector pin 6 is guided telescopically with its rear part and rests with its back against an actuating lever 7 designed as a toggle lever.

Der Betätigungshebel 7 weist eine Überlastsicherung 8 auf, an der der Auswerferbolzen 6 direkt anliegt und der einerends durch einen Haltebolzen 9 und anderenends durch eine Reißschraube 10 fixiert ist, die ab einer gewissen kritischen Belastung bricht und damit den gesamten Antrieb für den Auswerferbolzen 6 gegen Überlastung schützt.The actuating lever 7 has an overload safety device 8, on which the ejector pin 6 is in direct contact and which is fixed at one end by a retaining pin 9 and at the other end by a tear screw 10, which breaks at a certain critical load and thus the entire drive for the ejector pin 6 against overload protects.

Der Betätigungshebel 7 ist über eine Koppelstange 11 gelenkig mit einem Antriebshebel 12 verbunden. Dieser Antriebshebel 12 hat einen kreisbogenförmigen Teilabschnitt 13, auf dem die als Schiebestück 14 ausgebildete Anlenkung der Koppelstange 11 verschoben werden kann.The actuating lever 7 is connected in an articulated manner to a drive lever 12 via a coupling rod 11. This drive lever 12 has a circular section 13 on which the articulation of the coupling rod 11, which is designed as a sliding piece 14, can be displaced.

Das Schiebestück 14 umfaßt dabei den Antriebshebel 12 und weist eine Feststelleinrichtung 15 auf, die aus einem senkrecht zum Antriebshebel 12 bewegbaren Klemmstück 16, einem Klemmkeil 17 mit zu dessen beiden Seiten angeordneten Druckzylindern 18, 19 besteht. Je nach Druckbeaufschlagung des einen oder anderen Druckzylinders 18, 19 kann die Feststelleinrichtung 14 durch Verschiebung des Klemmkeils 17 gelöst oder fixiert werden.The sliding piece 14 comprises the drive lever 12 and has a locking device 15 which consists of a clamping piece 16 movable vertically to the drive lever 12, a clamping wedge 17 with pressure cylinders 18, 19 arranged on both sides thereof. Depending on the pressurization of one or the other pressure cylinder 18, 19, the locking device 14 can be released or fixed by moving the clamping wedge 17.

Die Verschiebung des Schiebestücks 14 geschieht mittels eines zweistufigen Druckzylinders 20, der einerends am Schiebestück 14 und andernends an einem Hebelarm 21 des Antriebshebels 12 angelenkt ist.The sliding piece 14 is displaced by means of a two-stage pressure cylinder 20, which is articulated on one side on the sliding piece 14 and on the other side on a lever arm 21 of the drive lever 12.

Der Antriebshebel 12 weist an seinem gerade auslaufenden Ende eine Rolle 22 auf, die auf einer Nockenscheibe 23 abläuft, die wiederum mit dem Pressenantrieb verbunden ist. Im Bereich der Rolle 22 greift auch ein Pneumatikzylinder 24 am Antriebshebel 12 an, der mit seinem anderen Ende am Maschinenrahmen 1 angelenkt ist. Mit diesem Pneumatikzylinder 24 läßt sich der Antriebshebel 12 von der Nockenscheibe 23 abheben, bis der Auswerferbolzen 6 die maximale Auswerferhubstellung erreicht hat.The drive lever 12 has a roller 22 at its straight end, which runs on a cam disk 23, which in turn is connected to the press drive. In the area of the roller 22, a pneumatic cylinder 24 also acts on the drive lever 12, the other end of which is articulated on the machine frame 1. With this pneumatic cylinder 24, the drive lever 12 can be lifted off the cam disk 23 until the ejector pin 6 has reached the maximum ejector stroke position.

An der Rückseite des Betätigungshebels 7 ist ein koaxial zum Auswerferbolzen 6 angeordneter Anschlagbolzen 25 vorgesehen, der in axialer Richtung verstellbar ist. Hierzu ist ein Spindelantrieb 26 vorgesehen, wie er aus der DE-B2-27 40 616 im einzelnen bekannt ist, so daß auf seine nähere Beschreibung hier verzichtet wird.On the back of the actuating lever 7 there is provided a stop pin 25 which is arranged coaxially with the ejector pin 6 and which is adjustable in the axial direction. For this purpose, a spindle drive 26 is provided, as is known in detail from DE-B2-27 40 616, so that its detailed description is omitted here.

Die Verstellung des Auswerferhubes geht mit dieser Anordnung wie folgt vor sich. Zunächst wird der Pneumatikzylinder 24 in der Weise beaufschlagt, daß die Rolle 22 des Antriebshebels 12 vom Grundkreis der Nockenscheibe 23 abhebt. Hierdurch wird der Auswerferbolzen 6 in die Bohrung 5 der Matrize 2 hineingeschoben, und zwar soweit, bis er seine maximale Auswerferhubstellung erreicht. Diese Stellung ist in Figur 1 dargestellt.The adjustment of the ejector stroke takes place as follows with this arrangement. First, the pneumatic cylinder 24 is acted on in such a way that the roller 22 of the drive lever 12 lifts off the base circle of the cam disk 23. As a result, the ejector pin 6 is pushed into the bore 5 of the die 2, namely until it reaches its maximum ejector stroke position. This position is shown in Figure 1.

Der Antriebshebel 12 nimmt dann eine Stellung ein, in der die Koppelstange 11 senkrecht zu dem kreisbogenförmigen Teilabschnitt 13 steht, d. h. der Anlenkpunkt der Koppelstange 11 am Betätigungshebel 7 bildet den Mittelpunkt für den Kreisbogen des Teilabschnittes 13.The drive lever 12 then assumes a position in which the coupling rod 11 is perpendicular to the circular section 13, i. H. the articulation point of the coupling rod 11 on the actuating lever 7 forms the center point for the circular arc of the section 13.

Aufgrund dieser Gegebenheit kann nun das Schiebestück 14 auf dem Teilabschnitt 13 verschoben werden, ohne daß sich an der Stellung des Auswerferbolzens 6 etwas ändert. Dies geschieht mittels des Druckzylinders 20 nach Lösen des Klemmkeils 17, wobei das Schiebestück 14 zunächst in die äußerste Stellung am freien Ende des Teilabschnittes 13 verschoben wird. Es ist dies die Stellung, in der aufgrund der dann gegebenen Hebelverhältnisse der Rückhub des Auswerferbolzens 6 am größten ist.Due to this fact, the sliding piece 14 can now be moved on the section 13 without changing anything in the position of the ejector pin 6. This is done by means of the pressure cylinder 20 after loosening the clamping wedge 17, the sliding piece 14 first being moved into the outermost position at the free end of the section 13. It is the position in which due to the then given lever ratios, the return stroke of the ejector pin 6 is greatest.

Währenddessen kann der Anschlagbolzen 25, der den Rückhub begrenzt, mittels des Spindelantriebs 26 in die gewünschte Stellung gebracht werden. Dann wird der Pneumatikzylinder 24 wieder in umgekehrter Richtung beaufschlagt, so daß der Antriebshebel 12 mit seiner Rolle 22 wieder in Richtung der Nockenscheibe 23 schwenkt. Hierdurch schwenkt auch der Antriebshebel 7 zurück, und zwar bis er mit seiner Rückseite am Anschlagbolzen 25 anliegt. Mit zurück geht dann auch der Auswerferbolzen 6.In the meantime, the stop pin 25, which limits the return stroke, can be brought into the desired position by means of the spindle drive 26. Then the pneumatic cylinder 24 is again acted upon in the opposite direction, so that the drive lever 12 with its roller 22 pivots again in the direction of the cam disk 23. As a result, the drive lever 7 also pivots back, namely until its back abuts the stop pin 25. The ejector pin 6 then also goes back.

Sofern sich der Anschlagbolzen 25 nicht in seiner ganz zurückgezogenen Stellung befindet, kommt die Rolle 22 am Antriebshebel 12 nicht zur Anlage an der Nockenscheibe 23, da sich ja das Schiebestück 14 in seiner äußersten Stellung befindet. Es wird dann die Feststelleinrichtung 15 gelöst und das Schiebestück 14 mittels des Druckzylinders 20 in Richtung auf den Lagerpunkt des Antriebshebels 12 verschoben, wobei der Antriebshebel 12 mit der Rolle 22 aufgrund der sich dann ändernden Hebelverhältnisse in Richtung auf die Nockenscheibe 23 schwenkt, während der Betätigungshebel 7 in seiner Anlagestellung am Anschlagbolzen 25 verharrt.If the stop pin 25 is not in its fully retracted position, the roller 22 on the drive lever 12 does not come into contact with the cam disk 23, since the sliding piece 14 is in its outermost position. The locking device 15 is then released and the sliding piece 14 is displaced by means of the pressure cylinder 20 in the direction of the bearing point of the drive lever 12, the drive lever 12 pivoting with the roller 22 in the direction of the cam disk 23 due to the then changing lever ratios, while the actuating lever 7 remains in its contact position on the stop pin 25.

Das Bewegen des Schiebestückes 14 geht solange vor sich, bis die Rolle 22 des Antriebshebels 12 auf der Nockenscheibe 23 aufliegt. Diese Stellung ist in Figur 2 dargestellt. Mittels eines Näherungsschalters 27 wird die Druckbeaufschlagung des Druckzylinders 20 unterbrochen, wenn die Rolle 22 an der Nockenscheibe 23 zur Anlage gekommen ist. Dann wird der Klemmkeil 17 der Feststelleinrichtung 15 in Klemmrichtung geschoben, so daß das Schiebestück 14 auf dem Teilabschnitt 13 fixiert ist. Das Betätigungsgestänge des Auswerferbolzens 6 ist dann auf den neuen Auswerferhub eingestellt.The movement of the sliding piece 14 continues until the roller 22 of the drive lever 12 rests on the cam disk 23. This position is shown in Figure 2. By means of a proximity switch 27, the pressurization of the pressure cylinder 20 is interrupted when the roller 22 has come into contact with the cam disk 23. Then the clamping wedge 17 of the locking device 15 is pushed in the clamping direction, so that the sliding piece 14 is fixed on the section 13. The actuating linkage of the ejector pin 6 is then set to the new ejector stroke.

Claims (11)

1. Metal-forming press for the production of pressed parts, this press possessing at least one ejector arrangement for ejecting the pressed parts from a female die (2), the principal components of this ejector arrangement being an ejector pin (6) which can be moved into the female die (2) and an actuating link-system which comprises an actuating lever (7) for applying a force to the ejector pin (6), a driving lever (12), connected to the drive mechanism of the metal-forming press, and a connecting rod (11), connecting the two levers (7, 12), the driving lever (12) having, in part, the shape of an arc (13) of a circle, and the coupling rod (11) being pivotably attached, in the region of the arc (13) of a circle, via a sliding piece (14), while the actuating lever (7) and the driving lever (12) are arranged in a manner such that when the ejector is at its full stroke, the centre of the arc (13) of a circle coincides with the point at which the coupling rod (11) is pivotably attached to the actuating lever (7), characterised by a stop- pin (25) which can be adjusted by means of a motor and acts as a stop for the actuating lever (7), by an adjusting motor (20) which is installed on the driving lever (12) for the purpose of shifting the sliding piece (14) on the arc (13) of a circle, and by a power-driven locking device (15) for the sliding piece (14).
2. Metal-forming press according to Claim 1, characterised in that a jack device (24) acts on the actuating link-system (7, 11, 12), in order to thrust the ejector pin (6) into the position corresponding to the full stroke of the ejector.
3. Metal-forming press according to Claim 2, characterised in that the jack device (24) is pivotaby attached to the driving lever (12).
4. Metal-forming press according to Claim 3, characterised in that the jack device is designed as a pneumatic pressure cylinder (24).
5. Metal-forming press according to Claims 1 to 4, characterised in that the adjusting motor is designed as a pressure cylinder (20) which, at one of its ends, is pivotably attached to the driving lever (12) and, at its other end, is pivotably attached to the sliding piece (14).
6. Metal-forming press according to Claim 5, characterised in that the adjusting motor is designed as a hydraulic pressure cylinder (20).
7. Metal-forming press according to one of Claims 1 to 6, characterised in that the locking device (15) posseses a clamping-wedge (17) for the purpose of jamming the sliding piece (14) against the driving lever (12).
8. Metal-forming press according to Claim 7, characterised in that the clamping-wedge (17) can be released, or fixed, by means of at least one hydraulic pressure-cylinder (18, 19).
9. Metal-forming press according to Claim 8, characterised in that the clamping wedge (17) can be released, or fixed, by means of two hydraulic cylinders (18, 19).
10. Metal-forming press according to one of Claims 1 to 9, characterised by a proximity switch (27) which shuts down the adjusting motor (20) when the driving lever (12) bears against the drive mechanism (23).
11. Metal-forming press according to Claim 10, characterised in that a cam plate (23) is employed for transmitting the drive.
EP81103865A 1980-06-11 1981-05-20 Metal-forming press for the production of pressed pieces Expired EP0041633B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81103865T ATE9204T1 (en) 1980-06-11 1981-05-20 FORMING PRESS FOR THE MANUFACTURE OF PRESSED PARTS.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19803021790 DE3021790A1 (en) 1980-06-11 1980-06-11 FORMING PRESS FOR THE PRODUCTION OF PRESSED PARTS
DE3021790 1980-06-11

Publications (3)

Publication Number Publication Date
EP0041633A2 EP0041633A2 (en) 1981-12-16
EP0041633A3 EP0041633A3 (en) 1982-03-24
EP0041633B1 true EP0041633B1 (en) 1984-09-05

Family

ID=6104287

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81103865A Expired EP0041633B1 (en) 1980-06-11 1981-05-20 Metal-forming press for the production of pressed pieces

Country Status (4)

Country Link
EP (1) EP0041633B1 (en)
AT (1) ATE9204T1 (en)
DE (2) DE3021790A1 (en)
ES (1) ES502921A0 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3703238A1 (en) * 1987-02-04 1988-08-18 Kieserling & Albrecht Adjusting device for an ejector on presses

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3418508A1 (en) * 1984-05-18 1985-11-21 L. Schuler GmbH, 7320 Göppingen DEVICE FOR EJECTING THE MOLDED PARTS FROM THE DIE IN A FORMING PRESS
DE20218783U1 (en) 2002-12-03 2004-04-08 Wik Far East Ltd. Styling and curling hair brush

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2740616B2 (en) * 1977-09-09 1979-12-13 Peltzer & Ehlers Gmbh & Co, 4150 Krefeld Forming press, in particular multi-stage press

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1627684B1 (en) * 1967-11-09 1970-08-27 Kieserling & Albrecht Ejector drive on presses, in particular cold extrusion presses for the production of workpieces that are long in relation to their diameter
AT300520B (en) * 1970-06-11 1972-07-25 Nedschroef Octrooi Maats Press for upsetting bolts and the like.
CH532436A (en) * 1971-07-06 1973-01-15 Kieserling & Albrecht Ejector device for cold extrusion presses - with mechanism for returning ejector to initial position after each ejection

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2740616B2 (en) * 1977-09-09 1979-12-13 Peltzer & Ehlers Gmbh & Co, 4150 Krefeld Forming press, in particular multi-stage press

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3703238A1 (en) * 1987-02-04 1988-08-18 Kieserling & Albrecht Adjusting device for an ejector on presses

Also Published As

Publication number Publication date
DE3165835D1 (en) 1984-10-11
ATE9204T1 (en) 1984-09-15
EP0041633A3 (en) 1982-03-24
ES8300527A1 (en) 1982-11-01
ES502921A0 (en) 1982-11-01
DE3021790A1 (en) 1981-12-17
EP0041633A2 (en) 1981-12-16

Similar Documents

Publication Publication Date Title
CH654779A5 (en) PNEUMATICALLY DRIVEN TENSIONER.
DE1945799A1 (en) Punching or cutting press with guides for the tool plates
EP0388721A2 (en) Press with tool frame insertable into the press
DE1082023B (en) Lifting table with Nuernberger scissors
EP0330914A1 (en) Device for ejecting work pieces from dies in a forming press
EP1153735B1 (en) Punch for rotary press
EP0224096B1 (en) Press for making formed objects from powdery or granulated materials
EP0324172B1 (en) Device for monitoring the possible entanglement around a cylinder for guiding a textile sliver
EP0041633B1 (en) Metal-forming press for the production of pressed pieces
DD269586B3 (en) DEVICE FOR LAYING UP QUICK RELIEF OF FLEXIBLE PRESSURE PLATES
DE2450973C3 (en) Device for adjusting the ram stroke in double column presses with two eccentric shafts lying next to each other
DE2443376C2 (en) Pneumatically or hydraulically operated frame press
EP0709187A1 (en) Support for a press element which can be pressed into and retracted from a cylinder of a printing machine
DE3914762A1 (en) Multipurpose metal forming machine tool - has rotatable tool holder to bring required tool into operation
DE3142679C2 (en) Crank-operated lever and joint drive for press rams
EP0151204A1 (en) Coining press
DE1602423C3 (en) Bending and punching machine for the production of shaped parts from wire or tape
EP0718091A1 (en) Coin press
DE2148528A1 (en) EJECTOR DEVICE FOR PUSHING PRESSED PARTS FROM THE FIXED DIE OF IMPRESSION, DOUBLE PRESSURE OR MULTI-STAGE PRESSES
DE2414442A1 (en) Pressing ejector mechanism from die - has adjustable actuator on swing arm between two levers
DE8015465U1 (en) FORMING PRESS FOR THE PRODUCTION OF PRESSED PARTS
DE3112810C2 (en)
DE1270576B (en) Embossing machine
DE4303017A1 (en) Toggle lever press with ram coupled to press plate
DE866461C (en) Toggle press

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT BE CH DE FR GB IT NL

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Designated state(s): AT BE CH DE FR GB IT NL

17P Request for examination filed

Effective date: 19820820

ITF It: translation for a ep patent filed

Owner name: STUDIO JAUMANN

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): AT BE CH DE FR GB IT LI NL

REF Corresponds to:

Ref document number: 9204

Country of ref document: AT

Date of ref document: 19840915

Kind code of ref document: T

REF Corresponds to:

Ref document number: 3165835

Country of ref document: DE

Date of ref document: 19841011

ET Fr: translation filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 19850515

Year of fee payment: 5

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Effective date: 19860520

GBPC Gb: european patent ceased through non-payment of renewal fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19870130

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19881118

ITTA It: last paid annual fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 19920413

Year of fee payment: 12

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19920531

Year of fee payment: 12

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19920619

Year of fee payment: 12

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19920717

Year of fee payment: 12

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Effective date: 19930531

Ref country code: CH

Effective date: 19930531

Ref country code: BE

Effective date: 19930531

BERE Be: lapsed

Owner name: L. SCHULER G.M.B.H.

Effective date: 19930531

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19931201

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee
REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19940201