EP0045948A1 - Use of a toggle drive for a press - Google Patents

Use of a toggle drive for a press Download PDF

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Publication number
EP0045948A1
EP0045948A1 EP81106163A EP81106163A EP0045948A1 EP 0045948 A1 EP0045948 A1 EP 0045948A1 EP 81106163 A EP81106163 A EP 81106163A EP 81106163 A EP81106163 A EP 81106163A EP 0045948 A1 EP0045948 A1 EP 0045948A1
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EP
European Patent Office
Prior art keywords
crank
bars
positions
drive
connecting rod
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Granted
Application number
EP81106163A
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German (de)
French (fr)
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EP0045948B1 (en
Inventor
Wilfried Voss
Günter Riedisser
Kurt Finsterwalder
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L Schuler GmbH
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L Schuler GmbH
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Publication of EP0045948A1 publication Critical patent/EP0045948A1/en
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Publication of EP0045948B1 publication Critical patent/EP0045948B1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B1/00—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen
    • B30B1/10—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by toggle mechanism
    • B30B1/14—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by toggle mechanism operated by cams, eccentrics, or cranks

Definitions

  • the invention relates to a knee joint drive for a plunger guided in a frame of a press with a first stilt articulated to the frame, a second stilt articulated on the plunger, a connecting rod connected directly or indirectly to the connecting joint of the two stilts, and a drive crank on which the stilt is connected opposite end of the connecting rod is supported, the stilts passing through their extended position and once each of their two bent end positions during each revolution of the drive crank along their crank circle.
  • DE-PS 26 31 186 shows and describes a knee joint drive corresponding to the generic term, but here the symmetry of the bent positions of the stilts in relation to the crank circle has been given corresponding importance.
  • the object on which the invention is based is to dimension a genre-forming knee joint drive in such a way that the stretch twice during a crankshaft revolution position of the stilts is traversed, the stretching points being arranged as close as possible to one another, separated from one another by a small stroke, the nominal force paths being of the same size and being traversed at almost the same ram speed.
  • the connecting rod forms an equilateral triangle in its two extended positions, the middle perpendicular created on the crank circular chord connecting the extended position points intersecting the center of the crank circle fixed to the press frame, that the crank paths in the crank circle determined by the nominal force paths defined in front of the extended positions result in almost congruent circular segments, and that the circular segments enclose a central angle between the extended positions, which includes an acute to obtuse angle region.
  • the main advantage of the knee joint drive according to the invention is its application on forging or forming presses, such as, for. B. Cutlery presses to see.
  • the tools have to be driven twice onto the workpiece in a predominant majority of applications, on the one hand to carry out the forming work and on the other hand to produce a glossy embossing.
  • This working method is usually realized in that the presses used have to carry out two strokes, as a result of which time is lost and a correction of the position of the workpiece after the first stroke is often necessary.
  • the use of an automation device, the drive of which is derived directly from the press drive in a simple and cost-saving manner can be realized only with great difficulty. All of these disadvantages of the existing systems are avoided by the invention without a significant additional expense in purchase to have to take.
  • a first stilt 11 is mounted, at whose end facing away from the articulation 10 a second stilt 13 is articulated in a connecting joint 12, which at its end facing away from the connecting joint 12 in a plunger-side articulation 14 on a Ram 15 is mounted, which is movable in guides 16 fixed to the press frame.
  • a connecting rod 17 is also articulated in the connecting joint 12, the end of which is remote from the connecting joint 12 is mounted on a drive crank 18 which has a rotational axis fixed to the frame and extending through the center of the crank circle 19.
  • Fig. 1 shows a crank circuit 20, with the help of the characteristic positions of the drive crank 18, the connecting rod 17 and the stilts 11, 13 are shown.
  • the strongly drawn lines represent the rest position of the knee joint drive in the top dead center OT 1 in the strongly bent position and a release position OT 2 in the lower bent position during a working stroke (FIG. 2).
  • Two characteristic positions of the knee joint drive are given by the first bottom dead center UT 1 and the second bottom dead center UT 2, the bottom dead center UT 1 being equal to the bottom dead center UT 2 in relation to the stroke of the ram 15 (FIG. 2).
  • the connecting rods 17 ', 17 "shown in dash-dotted lines form an isosceles triangle.
  • the positions of the connecting rods 17''', 17 '''' shown in broken lines correspond respectively to the starting points 22, 23 of the stretching positions 24 of the Stilts 11, 13 defined nominal force paths S N.
  • the circle segments formed from the starting point 22, the bottom dead center UT 1, the crank center 19 and the starting point 23, the bottom dead center UT 2, the crank center 19 must be almost congruent.
  • the central angle 25 which is due to the extended positions 24 of the stilts 11, 13 and the associated positions of the connecting rods 17 ', 17 "and the drive crank 18 ', 18 "is intended to include an acute to obtuse-angled area.
  • the central angle 25 should be selected at an acute angle up to the area of a right angle in order to ensure optimum operation of the press, which is equipped with a knee joint drive according to the invention, to reach.
  • the knee joint drive shown in FIG. 3 is modified in comparison to the knee joint drive shown in FIG. 1 and described above in such a way that the stilt 11 (FIG. 1) is expanded to form a wishbone 11, 11 ', 30.
  • the stilt 11 FIG. 1
  • all other components are constructed identically to FIG. 1 and provided with the same reference symbols. To avoid repetition, reference is therefore made to the description of FIG. 1.
  • the dissolution of the stilts 11 in the wishbones 11, 11 ', 30 allows a compact, space-saving construction of the knee joint drive.
  • the function of the knee joint drives according to the invention is in. can be read essentially from the diagram according to FIG. 2.
  • the plunger 15 runs from the rest position OT 1 through the first bottom dead center UT 1, the forming work being essentially carried out on the associated nominal force path S N.
  • the tappet 15 After the tappet 15 has been released to the venting point OT 2, which should be arranged in the immediate vicinity of the bottom dead centers UT 1, UT 2, the tappet 15 reaches the second bottom dead center UT 2, with an essentially embossed effect on the nominal force path S N becomes.
  • the return to the rest position OT 1 immediately follows the second work stroke.

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

Abstract

1. Use of a knee action drive of a plunger (15) guided in the frame of a press for different successively executed working steps such as cutting, stamping and shaping sheet metal and sheet metal parts in forging and shaping presses with utilisation of the two strokes produced during each revolution of the crank for two movements of the tool onto a workpiece, having a first bar (11) rotatably supported in the press frame (at 10), a second bar (13) rotatably supported on the plunger (15), a connecting rod (17) rotatably connected to the common pin-joint (12) of the two bars (11, 13) and a drive crank (18), on which the end of the connecting rod (17) remote from the pin-joint (12) is rotatably supported, wherein the bars (11, 13), during each revolution of the drive crank (18) along the crank circle (20), arrive twice at the extended position (24) and arrive once each at the two fully deflected end positions providing the upper dead centres (OT1, OT2) of the plunger (15), wherein the workpiece is shaped during the movement of the bars (11, 13) from a first fully deflected end position into the extended position (24) and is burnished during the movement of the bars (11, 13) from the second fully deflected end position into the extended position (24) reached in this way in the opposite movement of the bars (11, 13), wherein the positions (18', 18") of the drive crank (18) associated with the positions (17', 17") of the connecting rod (17) characterised by the extended positions (24) of the bars (11, 13) form a central angle (25) in the circular segment of the crank circle (20) remote from the bars (11, 13), which central angle is less than 180 angular degrees and hence provides a longer time for workpiece changing between the working strokes, and wherein the circular segments (22, UT1, 19 and 23, UT2, 19) traversed by the drive crank (18) in the peripheral direction of the drive crank (18) before the lower dead centres (UT1, UT2), ending with the bottom dead centres (UT1, UT2) and representing the nominal force paths (SN ) are, at least approximately, equally large.

Description

Die Erfindung betrifft einen Kniegelenkantrieb für einen in einem Gestell einer Presse geführten Stößel mit einer gestellfest angelenkten ersten Stelze, einer an dem Stößel angelenkten zweiten Stelze, einem mit dem Verbindungsgelenk beider Stelzen mittelbar oder unmittelbar verbundenen Pleuel und einer Antriebskurbel, auf der das von den Stelzen abgewandte Ende des Pleuels gelagert ist, wobei die Stelzen während jedes Umlaufes der Antriebskurbel längs ihres Kurbelkreises zweimal ihre Strecklage und einmal jede ihrer beiden ausgeknickten Endlagen durchlaufen.The invention relates to a knee joint drive for a plunger guided in a frame of a press with a first stilt articulated to the frame, a second stilt articulated on the plunger, a connecting rod connected directly or indirectly to the connecting joint of the two stilts, and a drive crank on which the stilt is connected opposite end of the connecting rod is supported, the stilts passing through their extended position and once each of their two bent end positions during each revolution of the drive crank along their crank circle.

Einen dem Gattungsbegriff entsprechenden Kniegelenkantrieb zeigt und beschreibt die DE-PS 26 31 186, wobei hier jedoch auf die Symmetrie der ausgeknickten Lagen der Stelzen in Bezug auf den Kurbelkreis entsprechend Wert gelegt wurde.DE-PS 26 31 186 shows and describes a knee joint drive corresponding to the generic term, but here the symmetry of the bent positions of the stilts in relation to the crank circle has been given corresponding importance.

Ein weiterer, dem Gattungsbegriff nahekommender Kniegelenkantrieb ist in der DE-AS 20 12 976 beschrieben. Auf eine verlängerte Stillstands - bzw. Verzögerungsphase im Bereich des oberen Totpunktes zwecks leichterer Zu- und Abführung der zu bearbeitenden Werkstücke wird hierbei jedoch besonderer Wert gelegt.Another knee joint drive that comes close to the generic term is described in DE-AS 20 12 976. However, special emphasis is placed on an extended standstill or delay phase in the area of top dead center in order to facilitate the feeding and removal of the workpieces to be machined.

Ein dritter, mit dem Gattungsbegriff vergleichbarer Stand der Technik ist der DE-PS 848 141 zu entnehmen. Diese Lösung beinhaltet Möglichkeiten, den Pressenhub und/oder die Arbeitsfrequenz in bestimmten Bereichen zu regeln.A third prior art comparable to the generic term can be found in DE-PS 848 141. This solution includes options for controlling the press stroke and / or the working frequency in certain areas.

Hiervon ausgehend besteht die der Erfindung zugrundeliegende Aufgabe darin, einen gattungsbildenden Kniegelenkantrieb derart zu dimensionieren, daß bei einer Kurbelwellenumdrehung zweimal die Strecklage der Stelzen durchlaufen wird, wobei die Strecklagenpunkte möglichst nahe zueinander angeordnet sind, durch einen geringen Hub voneinander getrennt sind, die Nennkraftwege gleich groß sind und mit nahezu gleicher Stößelgeschwindigkeit durchlaufen werden.Proceeding from this, the object on which the invention is based is to dimension a genre-forming knee joint drive in such a way that the stretch twice during a crankshaft revolution position of the stilts is traversed, the stretching points being arranged as close as possible to one another, separated from one another by a small stroke, the nominal force paths being of the same size and being traversed at almost the same ram speed.

Diese Aufgabe ist dadurch gelöst, daß das Pleuel in seinen beiden Strecklagen ein gleichseitiges Dreieck bildet, dessen auf der die Strecklagenpunkte verbindenden Kurbelkreissehne errichteten Mittelsenkrechten den pressengestellfesten Kurbelkreismittelpunkt schneidet, daß die von den vor den-Strecklagen definierten Nennkraftwegen bestimmten- -.― Kurbelwinkel im Kurbelkreis nahezu deckungsgleiche Kreissegmente ergeben, und daß die Kreissegmente einen Zentriwinkel zwischen den Strecklagen einschließen, der einen spitz- bis stumpfwinkeligen Bereich einschließt.This object is achieved in that the connecting rod forms an equilateral triangle in its two extended positions, the middle perpendicular created on the crank circular chord connecting the extended position points intersecting the center of the crank circle fixed to the press frame, that the crank paths in the crank circle determined by the nominal force paths defined in front of the extended positions result in almost congruent circular segments, and that the circular segments enclose a central angle between the extended positions, which includes an acute to obtuse angle region.

Eine vorteilhafte Ausgestaltung des Kniegelenkantriebes gemäß Patentanspruch 2 ergibt eine sehr kompakte Bauform der Maschine, während die weitere günstige Ausgestaltung gemäß dem Merkmal des Patentanspruches 3 zu einer vorteilhaften, ausreichend langen Automationszeit führt.An advantageous embodiment of the knee joint drive according to claim 2 results in a very compact design of the machine, while the further favorable embodiment according to the feature of claim 3 leads to an advantageous, sufficiently long automation time.

Der wesentliche Vorteil des erfindungsgemäßen Kniegelenkantriebes ist jedoch in seiner Anwendung auf Schmiede- bzw. Umformprägepressen, wie z. B. Besteckpressen, zu sehen. Bei diesen Pressen ist in einer überwiegenden Mehrzahl der Einsatzfälle ein zweimaliges Auffahren der Werkzeuge auf das Werkstück erforderlich und zwar zum einen, um die Umformarbeit durchzuführen, und zum anderen, um eine Glanzprägung hervorzubringen. Üblicherweise wird dieses Arbeitsverfahren dadurch verwirklicht, daß die eingesetzten Pressen zwei Hübe durchführen müssen, wodurch einmal Zeit verloren wird und weiterhin oft eine Korrektur der Lage des Werkstückes nach dem ersten Hub erforderlich ist. Die Verwendung einer Automationseinrichtung, deren Antrieb direkt von dem Pressenantrieb in einfacher und kostensparender Weise abgeleitet ist, kann nur sehr schwierig realisiert werden. Alle diese Nachteile der bestehenden Anlagen werden durch die Erfindung vermieden, ohne einen ins Gewicht fallenden Mehraufwand in Kauf nehmen zu müssen.The main advantage of the knee joint drive according to the invention, however, is its application on forging or forming presses, such as, for. B. Cutlery presses to see. With these presses, the tools have to be driven twice onto the workpiece in a predominant majority of applications, on the one hand to carry out the forming work and on the other hand to produce a glossy embossing. This working method is usually realized in that the presses used have to carry out two strokes, as a result of which time is lost and a correction of the position of the workpiece after the first stroke is often necessary. The use of an automation device, the drive of which is derived directly from the press drive in a simple and cost-saving manner, can be realized only with great difficulty. All of these disadvantages of the existing systems are avoided by the invention without a significant additional expense in purchase to have to take.

Anhand einer Zeichnung ist ein Beispiel eines erfindungsgemäßen Kniegelenkantriebes schematisch dargestellt und beschrieben. Es zeigen

  • Fig. 1 ein Getriebeschema mit den charakteristischen Lagen
  • Fig. 2 ein zugehöriges Diagramm des Stößelweges über dem Kurbelwinkel und
  • Fig. 3 ein weiteres Getriebeschema in gegenüber Fig. 1 vereinfachter Darstellung.
An example of a knee joint drive according to the invention is shown and described schematically on the basis of a drawing. Show it
  • Fig. 1 shows a transmission diagram with the characteristic positions
  • Fig. 2 is an associated diagram of the tappet travel over the crank angle and
  • Fig. 3 shows a further transmission diagram in a simplified representation compared to FIG. 1.

In einer gestellfesten Anlenkung 10 ist eine erste Stelze 11 gelagert, an deren-von-der Anlenkung 10 abgewandtem Ende in einem Ver bindungsgelenk 12 eine zweite Stelze 13 angelenkt ist, die an ihrem von dem Verbindungsgelenk 12 abgewandten Ende in einer stößelseitigen Anlenkung 14 an einem Stößel 15 gelagert ist, der in pressengestellfesten Führungen 16 bewegbar ist. In dem Verbindungsgelenk 12 ist ferner ein Pleuel 17 angelenkt, dessen von dem Verbindungsgelenk 12 abgewandtes Ende auf einer Antriebskurbel 18 gelagert ist, die eine gestellfeste, durch den Kurbelkreismittelpunkt 19 verlaufende Drehachse aufweist.In a frame-fixed articulation 10, a first stilt 11 is mounted, at whose end facing away from the articulation 10 a second stilt 13 is articulated in a connecting joint 12, which at its end facing away from the connecting joint 12 in a plunger-side articulation 14 on a Ram 15 is mounted, which is movable in guides 16 fixed to the press frame. A connecting rod 17 is also articulated in the connecting joint 12, the end of which is remote from the connecting joint 12 is mounted on a drive crank 18 which has a rotational axis fixed to the frame and extending through the center of the crank circle 19.

Fig. 1 zeigt einen Kurbelkreis 20, mit dessen Hilfe die charakteristischen Lagen der Antriebskurbel 18, des Pleuels 17 sowie der Stelzen 11, 13 dargestellt sind. Die stark ausgezogenen Linien stellen hierbei in der stark ausgeknickten Stellung die Ruhelage des Kniegelenkantriebes im oberen Totpunkt OT 1 und in der geringer ausgeknickten Stellung eine Lüftstellung OT 2 während eines Arbeitshubes dar (Fig. 2). Zwei charakteristische Lagen des Kniegelenkantriebes sind durch den ersten unteren Totpunkt UT 1 und den zweiten unteren Totpunkt UT 2 gegeben, wobei der untere Totpunkt UT 1 gleich dem unteren Totpunkt UT 2 ist bezogen auf den Hub des Stößels 15 (Fig. 2). In diesen Lagen bilden die strichpunktiert dargestellten Pleuel 17' , 17" ein gleichschenkeliges Dreieck. Eine auf der Kurbelkreissehne UT 1 UT 2 errichtete Mittelsenkrechte 21 schneidet den pressengestellfesten Kurbelkreismittelpunkt 19. Die gestrichelt dargestellten Lagen der Pleuel 17' ' ' , 17' ' ' ' entsprechen jeweils den Anfangspunkten 22, 23 der vor den Strecklagen 24 der Stelzen 11, 13 definierten Nennkraftwege SN. Die aus dem Anfangspunkt 22, dem unteren Totpunkt UT 1, dem Kurbelkreismittelpunkt 19 und dem Anfangspunkt 23, dem unteren Totpunkt UT 2, dem Kurbelkreismittelpunkt 19 gebildeten Kreissegmente müssen hierbei nahezu deckungsgleich sein. Um nun eine kurze Arbeitsphase und eine möglichst große Zeitspanne für eine Be- und Entladung mittels einer Automationseinrichtung erzielen zu können, sollte der Zentriwinkel 25, der durch die Strecklagen 24 der Stelzen 11, 13 und die zugehörigen Stellungen des Pleuels 17', 17" und der Antriebskurbel 18' , 18' ' bestimmt ist, einen spitzbis stumpfwinkeligen-Bereich einschließen. -Vorzugsweise sollte der Zen triwinkel 25 spitzwinkelig bis zum Bereich eines rechten Winkels gewählt werden, um eine optimale Betriebsweise der Presse, die mit einem erfindungsgemäßen Kniegelenkantrieb ausgerüstet ist, zu erreichen.Fig. 1 shows a crank circuit 20, with the help of the characteristic positions of the drive crank 18, the connecting rod 17 and the stilts 11, 13 are shown. The strongly drawn lines represent the rest position of the knee joint drive in the top dead center OT 1 in the strongly bent position and a release position OT 2 in the lower bent position during a working stroke (FIG. 2). Two characteristic positions of the knee joint drive are given by the first bottom dead center UT 1 and the second bottom dead center UT 2, the bottom dead center UT 1 being equal to the bottom dead center UT 2 in relation to the stroke of the ram 15 (FIG. 2). In these positions, the connecting rods 17 ', 17 "shown in dash-dotted lines form an isosceles triangle. A vertical perpendicular 21, which is erected on the crank circular chord UT 1 UT 2, intersects the crank circle center 19 fixed to the press frame. The positions of the connecting rods 17''', 17 '''' shown in broken lines correspond respectively to the starting points 22, 23 of the stretching positions 24 of the Stilts 11, 13 defined nominal force paths S N. The circle segments formed from the starting point 22, the bottom dead center UT 1, the crank center 19 and the starting point 23, the bottom dead center UT 2, the crank center 19 must be almost congruent. In order to be able to achieve a short working phase and the longest possible time for loading and unloading by means of an automation device, the central angle 25, which is due to the extended positions 24 of the stilts 11, 13 and the associated positions of the connecting rods 17 ', 17 "and the drive crank 18 ', 18 "is intended to include an acute to obtuse-angled area. Preferably, the central angle 25 should be selected at an acute angle up to the area of a right angle in order to ensure optimum operation of the press, which is equipped with a knee joint drive according to the invention, to reach.

Der in Fig. 3 gezeigte Kniegelenkantrieb ist gegenüber dem in Fig. 1 gezeigten und vorstehend beschriebenen Kniegelenkantrieb derart modifiziert, daß die Stelze 11 (Fig. 1) zu einem Dreieckslenker 11, 11' , 30 ausgebaut ist. Alle anderen Bauteile sind prinzipiell gleich der Fig. 1 aufgebaut und mit den gleichen Bezugszeichen versehen. Um Wiederholungen zu vermeiden, wird daher auf die Beschreibung zu Fig. 1 verwiesen. Die Auflösung der Stelze 11 in den Dreieckslenker 11, 11', 30 erlaubt einen kompakten, raumsparenden Aufbau des Kniegelenkantriebes.The knee joint drive shown in FIG. 3 is modified in comparison to the knee joint drive shown in FIG. 1 and described above in such a way that the stilt 11 (FIG. 1) is expanded to form a wishbone 11, 11 ', 30. In principle, all other components are constructed identically to FIG. 1 and provided with the same reference symbols. To avoid repetition, reference is therefore made to the description of FIG. 1. The dissolution of the stilts 11 in the wishbones 11, 11 ', 30 allows a compact, space-saving construction of the knee joint drive.

Die Funktion der erfindungsgemäßen Kniegelenkantriebe ist im . wesentlichen aus dem Diagramm gemäß Fig. 2 ablesbar. Während einer Umdrehung der Antriebskurbel 18 läuft der Stößel 15 aus der Ruhelage OT 1 durch den ersten unteren Totpunkt UT 1, wobei auf dem zugehörigen Nennkraftweg SN im wesentlichen die Umformarbeit geleistet wird. Nach einem Lüften des Stößels 15 bis zum Lüftpunkt OT 2, der in unmittelbarer Nähe der unteren Totpunkte UT 1, UT 2 angeordnet sein sollte, erreicht der Stößel 15 den zweiten unteren Totpunkt UT 2, wobei auf dem Nennkraftweg SN im wesentlichen eine Glanzprägung vorgenommen wird. Der Rücklauf in die Ruhelage OT 1 schließt sich unmittelbar an den zweiten Arbeitsschlag an.The function of the knee joint drives according to the invention is in. can be read essentially from the diagram according to FIG. 2. During one revolution of the drive crank 18, the plunger 15 runs from the rest position OT 1 through the first bottom dead center UT 1, the forming work being essentially carried out on the associated nominal force path S N. After the tappet 15 has been released to the venting point OT 2, which should be arranged in the immediate vicinity of the bottom dead centers UT 1, UT 2, the tappet 15 reaches the second bottom dead center UT 2, with an essentially embossed effect on the nominal force path S N becomes. The return to the rest position OT 1 immediately follows the second work stroke.

Claims (3)

1. Kniegelenkantrieb für einen in einem Gestell einer Presse geführten Stößel (15) mit einer gestellfest angelenkten ersten Stelze (11), einer an dem Stößel ( 15) angelenkten zweiten Stelze (13), einem mit dem Verbindungsgelenk ( 12 ) beider Stelzen ( 11, 13) mittelbar oder unmittelbar verbundenen Pleuel ( 17 ) und einer Antriebskurbel (18), auf der das von den Stelzen (11, 13) abgewandte Ende des Pleuels (17) gelagert ist, wobei die Stelzen (11, 13) während jedes Umlaufes der Antriebskurbel (18) längs ihres Kurbelkreises (20) zweimal ihie Strecklage (24) und einmal jede ihrer beiden ausgeknickten Endlagen (OT 1, OT 2) durchlaufen, dadurch gekennzeichnet, daß das Pleuel (17) in seinen beiden Strecklagen (24) ein gleichschenkeliges Dreieck bildet, dessen auf der die Strecklagenpunkte (UT 1, UT 2) verbindenden Kurbelkreissehne (UT 1 UT 2) errichteten Mittelsenkrechten (21) den pressengestellfesten Kurbelkreismittelpunkt (19) schneidet, daß die von den vor den Strecklagen (24) definierten Nennkraftwegen (SN) bestimmten Kurbelwinkel im Kurbelkreis (20) nahezu deckungsgleiche Kreissegmente (22, UT 1, 19 - 23, UT 2, 19) ergeben, und daß die Kreissegmente (22, UT 1, 19 - 23, UT 2, 19) einen Zentriwinkel (25) zwischen den Strecklagen (24) einschließen, der einen spitz- bis stumpfwinkeligen Bereich einschließt.1. knee joint drive for a plunger (15) guided in a frame of a press with a first stilt (11) articulated to the frame, a second stilt (13) articulated on the plunger (15), one with the connecting joint (12) of both stilts (11 , 13) directly or indirectly connected connecting rods (17) and a drive crank (18) on which the end of the connecting rod (17) facing away from the stilts (11, 13) is mounted, the stilts (11, 13) during each revolution the drive crank (18) runs twice along its crank circle (20) in its extended position (24) and once in each of its two bent end positions (OT 1, OT 2), characterized in that the connecting rod (17) is in its two extended positions (24) Isosceles triangle forms, on the crank circular chord (UT 1 UT 2) connecting the stretching position points (UT 1, UT 2), the perpendicular bisector (19) intersects the crank circle center point (19) which is fixed to the press frame, that of those defined in front of the stretching positions (24) Nominal force paths (S N ) determine crank angles in the crank circle (20) almost congruent circle segments (22, UT 1, 19 - 23, UT 2, 19), and that the circle segments (22, UT 1, 19 - 23, UT 2, 19 ) Include a central angle (25) between the stretching layers (24), which includes an acute to obtuse angle area. 2. Kniegelenkantrieb nach Anspruch 1, dadurch gekennzeichnet, daß die Stelze (11) einen Schenkel eines spitzwinkeligen Dreieckslenkers (11, 11' , 30) bildet, dessen zweiter Schenkel (11' ) an dem der gestellfesten Anlenkung (10) abgewandten Ende mit dem Pleuel (17) verbunden ist.2. Knee joint drive according to claim 1, characterized in that the stilt (11) forms one leg of an acute-angled wishbone (11, 11 ', 30), the second leg (11') at the end facing away from the articulated linkage (10) with the Connecting rod (17) is connected. 3. Kniegelenkantrieb nach einem der Ansprüche 1 und 2, dadurch gekennzeichnet, daß der Zentriwinkel (25) einen annähernd rechten Winkel bildet.3. Knee joint drive according to one of claims 1 and 2, characterized in that the central angle (25) forms an approximately right angle.
EP81106163A 1980-08-08 1981-08-06 Use of a toggle drive for a press Expired EP0045948B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19803029999 DE3029999A1 (en) 1980-08-08 1980-08-08 KNEEL DRIVE FOR A PRESS
DE3029999 1980-08-08

Publications (2)

Publication Number Publication Date
EP0045948A1 true EP0045948A1 (en) 1982-02-17
EP0045948B1 EP0045948B1 (en) 1985-03-06

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Family Applications (1)

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EP81106163A Expired EP0045948B1 (en) 1980-08-08 1981-08-06 Use of a toggle drive for a press

Country Status (3)

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EP (1) EP0045948B1 (en)
DE (2) DE3029999A1 (en)
IT (1) IT1137833B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4109796C2 (en) * 1991-03-26 2002-05-29 Georg Burger Device for pressing, bending and / or punching
RU2583211C1 (en) * 2014-11-18 2016-05-10 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Московский государственный технологический университет "СТАНКИН" (ФГБОУ ВПО МГТУ "СТАНКИН") Knuckle-joint drive mechanical press with double passage of extreme position of slider

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE157536C (en) *
DE848141C (en) * 1946-02-06 1952-09-01 Svetsmekano Ab Machine for cutting sheet metal or similar material
DE1153251B (en) * 1954-04-30 1963-08-22 Giesserei & Maschinenfabrik Os Toggle press for hot pressing, cold stamping, extrusion, etc.
DE1527037A1 (en) * 1965-08-09 1969-05-08 Pressen Und Scherenbau Erfurt Infinitely adjustable screw jack on sheet metal cutting and forming machines

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE157536C (en) *
DE848141C (en) * 1946-02-06 1952-09-01 Svetsmekano Ab Machine for cutting sheet metal or similar material
DE1153251B (en) * 1954-04-30 1963-08-22 Giesserei & Maschinenfabrik Os Toggle press for hot pressing, cold stamping, extrusion, etc.
DE1527037A1 (en) * 1965-08-09 1969-05-08 Pressen Und Scherenbau Erfurt Infinitely adjustable screw jack on sheet metal cutting and forming machines

Also Published As

Publication number Publication date
IT1137833B (en) 1986-09-10
DE3169181D1 (en) 1985-04-11
IT8123422A0 (en) 1981-08-06
DE3029999A1 (en) 1982-03-18
EP0045948B1 (en) 1985-03-06

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