EP0248917A1 - Apparatus for adjusting the slide stroke of a press with an excentric shaft - Google Patents

Apparatus for adjusting the slide stroke of a press with an excentric shaft Download PDF

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Publication number
EP0248917A1
EP0248917A1 EP86107769A EP86107769A EP0248917A1 EP 0248917 A1 EP0248917 A1 EP 0248917A1 EP 86107769 A EP86107769 A EP 86107769A EP 86107769 A EP86107769 A EP 86107769A EP 0248917 A1 EP0248917 A1 EP 0248917A1
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EP
European Patent Office
Prior art keywords
eccentric
shaft
eccentric shaft
bushing
adjusting
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP86107769A
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German (de)
French (fr)
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EP0248917B1 (en
Inventor
Robert Czapka
Alfred Bareis
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L Schuler GmbH
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L Schuler GmbH
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Filing date
Publication date
Application filed by L Schuler GmbH filed Critical L Schuler GmbH
Priority to EP86107769A priority Critical patent/EP0248917B1/en
Priority to DE8686107769T priority patent/DE3677597D1/en
Priority to US07/057,358 priority patent/US4785732A/en
Priority to ES8701656A priority patent/ES2005247A6/en
Publication of EP0248917A1 publication Critical patent/EP0248917A1/en
Application granted granted Critical
Publication of EP0248917B1 publication Critical patent/EP0248917B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B30B1/26—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 cams, eccentrics, or cranks
    • B30B1/263—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 cams, eccentrics, or cranks work stroke adjustment means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/0064—Counterbalancing means for movable press elements
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/21—Elements
    • Y10T74/211—Eccentric
    • Y10T74/2111—Plural, movable relative to each other [including ball[s]]
    • Y10T74/2112—Concentric

Definitions

  • the invention relates to a device on a press with an eccentric shaft for adjusting the ram stroke by adjusting the resulting eccentricity of an eccentric and an eccentric bush mounted thereon, on which a connecting rod is mounted, the eccentric bush on the eccentric optionally detachable and fixable in the direction of rotation by actuating means is, and wherein the detached eccentric bushing can be fixed on a part not rotating with the eccentric shaft and in this fixed state the eccentric shaft can be rotated for the purpose of adjusting the tappet stroke.
  • Such devices are known in numerous embodiments, for example from DE-A 25 34 626, DE-A 27 40 382, DE-A 34 21 184 and DE-U 81 27 545, both for presses with only one Connecting rods (single-point presses) than on those with multiple connecting rods (multi-point presses). All these known devices have in common that for the release and fixing of the eccentric bush on the eccentric acting actuating means are provided, such as internal, external and spur gears and claw rings. These actuating means all have the disadvantages that they can only be brought into engagement in stages due to the positive interlocking, the engagement cannot be completely free of play, and there is a risk of deflection during operation of the machine and with frequent actuation.
  • press bandages are known per se as releasable connections, for example from the DE specialist book “connecting elements” by Decker, Carl Hanser Verlag Kunststoff 1963, pp. 284/285.
  • these press braces only serve to connect the parts in a certain mutual position and to release them if necessary, for example when dismantling a machine.
  • the first assembly of the press fit can take place either in the presence of a temperature difference between the eccentric sleeve and the eccentric or by pressurizing the cavity delimited by the cylindrical fitting surface in the eccentric sleeve.
  • An axial pressure oil line with at least one connecting line to the groove is expediently provided in the eccentric shaft, as a result of which the supply of pressure oil to the mating surfaces can be simplified.
  • the device on the eccentric shaft can have two rectified eccentrics of the same eccentricity with eccentric bushes of the same eccentricity mounted on them.
  • the required synchronism of the actuation can thus be easily achieved. If such a press is to be operated with a high number of strokes (high-speed press), mass balancing must generally be provided in the form of a balancing mass that can be moved in the opposite direction to the ram.
  • the eccentric shaft has at least one eccentric which diametrically opposes at least one other eccentric of the same eccentricity is directed, and that eccentric bushes of the same eccentricity are mounted on all eccentrics, or that the eccentric shaft has at least one eccentric which is diametrically opposed to at least one eccentric, and that the ratio of the eccentricities of the eccentric bushes to the eccentricities of the eccentrics for all eccentric / Eccentric bushing pairings is the same.
  • angular encoder disks are arranged coaxially on the eccentric shaft, at least one of which is non-rotatably connected to the eccentric shaft and at least one per eccentric bushing is rotatably mounted on the eccentric shaft and is non-rotatably connected to the associated eccentric bushing, and that each Angle encoder disk is assigned to at least one fixed contactless sensor.
  • an eccentric shaft 2 is mounted, which is provided with two rectilinear eccentrics 3 and a diametrically opposed eccentric 4, all of which have the same eccentricities.
  • Eccentric bushes 5, 6 are seated on the eccentrics 3, 4 and also have the same eccentricities.
  • Connecting rods 7 are mounted on the eccentric bushes 5 and are articulated on a tappet 9 at the other ends.
  • a connecting rod 8 is mounted on the eccentric bushing 6, which is articulated at the other end to a leveling mass 10.
  • a press fit is formed, which by supplying pressure oil through an axial pressure oil line 11 and connecting lines to a groove 12 in the mating surface of each eccentric 3, 4 is solvable.
  • a pressure oil source - not shown in the drawing - with a downstream valve is provided, which also enables the pressure oil line 11 to be relieved and the pressure oil to be drained off.
  • an angle encoder disk 13 is fastened coaxially and in a rotationally fixed manner, to which a sensor 14 which is fixed in space in the frame 1 is assigned.
  • three angle encoder disks 15 are rotatably mounted, each of which is rotatably connected to an eccentric sleeve 5, 6 in that the eccentric sleeve 5, 6 has a pin 16 projecting on one side, which engages in a slot 17 in the associated angle encoder disk 15 .
  • Each of the angle encoder disks 15 is assigned a contactless sensor 24 which is fixed in space in the frame 1.
  • each angle encoder disc 15 - shown in the drawing only in FIG. 2 for the angle encoder disc 15 assigned to the eccentric bushing 6 - has a recess 18 on the outer circumference, into which a bolt 19, which can be moved and controlled radially to the eccentric shaft 2, can engage, which can be engaged in the Frame 1 is slidably mounted.
  • Each bolt 19 has at its rear end, facing away from the associated recess 18, a nose 20 which interacts in each of the two end positions of the bolt 19 with one of two associated, contactless sensors 21, 22 which are fixed in space on the frame 1 .
  • the procedure is as follows. After the press has stopped, the eccentric shaft 2 with eccentrics 3, 4, eccentric bushes 5, 6 fixed thereon and associated angle encoder disks 13, 15 is rotated into an initial position at creep speed. This initial position corresponds to the plunger stroke that is still set and is determined in that in this initial position for the adjustment of the plunger stroke to be initiated, the bolts 19 can engage in the recesses 18 and initiators 23 provided on the angle encoder disks 15 face the assigned sensors 24. The reaching of this initial position is signaled by the sensors 24 and the eccentric shaft 2 is thus stopped by switching off the creep speed drive.
  • the bolts 19 are actuated radially inwards, which thereby engage in the recesses 18 and fix the angle encoder disks 15 and the eccentric bushes 5, 6 in the direction of rotation.
  • This state is reported by the radially inner sensors 21, which the lugs 20 on the bolt 19 face.
  • the eccentric shaft 2 with the eccentric tern 3, 4 rotated by the crawl speed drive according to the preselected ram stroke.
  • the angle of rotation path required for this or the absolute angle of rotation position required for this is detected by the angle encoder disk 13 and the associated sensor 14.
  • the correct angle of rotation position of the eccentric bushes 5, 6 on the eccentrics 3, 4 can be monitored by monitoring the synchronism of the occurrence of the signals at the sensors 24.
  • the correct rotational angle position of the eccentric bushes 5, 6 on the eccentrics 3, 4 can be restored by loosening the compression fittings, applying the bolts 19 radially inwards and rotating the eccentric shaft 2 until all bolts 19 in the recesses 18 engage, which can be indicated by the sensors 21. With this, the synchronism is restored; the bandages can be restored.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Press Drives And Press Lines (AREA)
  • Presses And Accessory Devices Thereof (AREA)

Abstract

Die Erfindung betrifft eine Vorrichtung an einer Presse mit Exzenterwelle (2) zum Verstellen des Stößelhubes durch Verstellen der resultierenden Exzentrizität eines Exzenters (3, 4) und einer darauf gelagerten Exzenterbüchse (5, 6), auf der ein Pleuel (7, 8) gelagert ist, wobei die Exzenterbüchse (5, 6) auf dem Exzenter (3, 4) durch Betätigungsmittel wahlweise im Drehsinne lösbar und festlegbar ist, und wobei die gelöste Exzenterbüchse (5, 6) an einem nicht mit der Exzenterwelle (2) drehenden Teil festlegbar und in diesem festgelegten Zustand die Exzenterwelle (2) zwecks Verstellens des Stößelhubes verdrehbar ist. Das Festlegen der Exzenterbüchse (5, 6) auf dem Exzenter (3, 4) soll stufenlos und spielfrei ermöglicht werden. Dies wird dadurch erreicht, daß die Lagerung der Exzenterbüchse (5, 6) auf dem ein Übermaß aufweisenden Exzenter (3, 4) ein zwischen diesen beiden Teilen hergestellter Preßverband mit zylindrischen Paßflächen ist, der durch Zuführen von Drucköl über mindestens eine Nut (12) in mindestens einer Paßfläche lösbar ist.The invention relates to a device on a press with an eccentric shaft (2) for adjusting the slide stroke by adjusting the resulting eccentricity of an eccentric (3, 4) and an eccentric bushing (5, 6) mounted thereon on which a connecting rod (7, 8) is mounted The eccentric bush (5, 6) on the eccentric (3, 4) can be detachably and fixed in the direction of rotation by actuating means, and the detached eccentric bush (5, 6) can be fixed on a part that does not rotate with the eccentric shaft (2) and in this defined state the eccentric shaft (2) can be rotated for the purpose of adjusting the ram stroke. The setting of the eccentric bushing (5, 6) on the eccentric (3, 4) should be made possible without steps and without play. This is achieved in that the bearing of the eccentric bushing (5, 6) on the excess eccentric (3, 4) is a press fit produced between these two parts with cylindrical mating surfaces, which by supplying pressure oil via at least one groove (12) is detachable in at least one mating surface.

Description

Die Erfindung bezieht sich auf eine Vorrichtung an einer Presse mit Exzenterwelle zum Verstellen des Stößelhubes durch Verstellen der resultierenden Exzentrizität eines Exzenters und einer darauf gelager­ten Exzenterbüchse, auf der ein Pleuel gelagert ist, wobei die Exzen­terbüchse auf dem Exzenter durch Betätigungsmittel wahlweise im Dreh­sinne lösbar und festlegbar ist, und wobei die gelöste Exzenterbüchse an einem nicht mit der Exzenterwelle drehenden Teil festlegbar und in diesem festgelegten Zustand die Exzenterwelle zwecks Verstellens des Stößelhubes verdrehbar ist.The invention relates to a device on a press with an eccentric shaft for adjusting the ram stroke by adjusting the resulting eccentricity of an eccentric and an eccentric bush mounted thereon, on which a connecting rod is mounted, the eccentric bush on the eccentric optionally detachable and fixable in the direction of rotation by actuating means is, and wherein the detached eccentric bushing can be fixed on a part not rotating with the eccentric shaft and in this fixed state the eccentric shaft can be rotated for the purpose of adjusting the tappet stroke.

Derartige Vorrichtungen sind in zahlreichen Ausführungsformen be­kannt, beispielsweise aus der DE-A 25 34 626, der DE-A 27 40 382, der DE-A 34 21 184 und der DE-U 81 27 545, und zwar sowohl für Pressen mit nur einem Pleuel (Einpunktpressen) als auf für solche mit mehre­ren Pleueln (Mehrpunktpressen). Allen diesen bekannten Vorrichtungen ist gemeinsam, daß zum Lösen und Festlegen der Exzenterbüchse auf dem Exzenter formschlüssig wirkende Betätigungsmittel vorgesehen sind, wie Innen-, Außen- und Stirnverzahnungen und Klauenringe. Diese Betä­tigungsmittel haben alle die Nachteile, daß diese wegen des form­schlüssigen Ineinandergreifens nur stufig in Eingriff bringbar sind, der Eingriff nicht völlig spielfrei sein kann, und die Gefahr des Aus­schlagens während des Betriebs der Maschine und bei häufiger Betäti­gung besteht.Such devices are known in numerous embodiments, for example from DE-A 25 34 626, DE-A 27 40 382, DE-A 34 21 184 and DE-U 81 27 545, both for presses with only one Connecting rods (single-point presses) than on those with multiple connecting rods (multi-point presses). All these known devices have in common that for the release and fixing of the eccentric bush on the eccentric acting actuating means are provided, such as internal, external and spur gears and claw rings. These actuating means all have the disadvantages that they can only be brought into engagement in stages due to the positive interlocking, the engagement cannot be completely free of play, and there is a risk of deflection during operation of the machine and with frequent actuation.

Von daher ist es Aufgabe der Erfindung, diese Nachteile zu vermei­den und ein stufenloses, spielfreies und gegen Ausschlagen dauerhaft unempfindliches Festlegen der Exzenterbüchse auf dem Exzenter zu er­möglichen.It is therefore an object of the invention to avoid these disadvantages and to enable the eccentric bushing to be positioned on the eccentric in a stepless, play-free manner and permanently insensitive to knocking out.

Diese Aufgabe ist erfindungsgemäß bei einer Vorrichtung der ein­gangs genannten Art dadurch gelöst, daß die Lagerung der Exzenterbüch­se auf dem ein Übermaß aufweisenden Exzenter ein zwischen diesen bei­den Teilen hergestellter Preßverband mit zylindrischen Paßflächen ist, der durch Zuführen von Drucköl über mindestens eine Nut in min­destens einer Paßfläche lösbar ist.This object is achieved in a device of the type mentioned above in that the bearing of the eccentric bush on the excess eccentric is a press fit produced between these two parts with cylindrical mating surfaces, which by supplying pressure oil via at least one groove in at least one mating surface is solvable.

Derartige Preßverbände sind als lösbare Verbindungen zwar an sich bekannt, beispielsweise aus dem DE-Fachbuch "Verbindungselemente" von Decker, Carl Hanser Verlag München 1963, S. 284/285. Jedoch dienen diese Preßverbände dort nur dazu, die Teile in einer bestimmten gegen­seitigen Lage zu verbinden und bei Bedarf, beispielsweise bei Demonta­ge einer Maschine, wieder zu lösen.Such press bandages are known per se as releasable connections, for example from the DE specialist book "connecting elements" by Decker, Carl Hanser Verlag Munich 1963, pp. 284/285. However, these press braces only serve to connect the parts in a certain mutual position and to release them if necessary, for example when dismantling a machine.

Ein während des Betriebes häufig vorkommendes Lösen und erneutes Festlegen in einer unterschiedlichen Winkellage der Teile zueinander ist dabei weder vorgesehen noch angestrebt. Die Vorteile der stufenlo­sen Festlegbarkeit und der Unempfindlichkeit gegen Ausschlagen bei häufiger Betätigung werden bei den bekannten Anwendungen von Preßver­bänden nicht ausgenützt.A loosening and re-fixing that occurs frequently during operation in a different angular position of the parts relative to one another is neither provided nor aimed for. The advantages of the stepless fixability and the insensitivity to knocking out with frequent actuation are not used in the known applications of press bandages.

Der erstmalige Zusammenbau des Preßverbandes kann entweder bei Vorhandensein einer Temperaturdifferenz zwischen Exzenterbüchse und Exzenter oder durch Druckmittelbeaufschlagung des von der zylinderi­schen Paßfläche in der Exzenterbüchse begrenzten Hohlraumes erfolgen.The first assembly of the press fit can take place either in the presence of a temperature difference between the eccentric sleeve and the eccentric or by pressurizing the cavity delimited by the cylindrical fitting surface in the eccentric sleeve.

Zweckmäßigerweise ist in der Exzenterwelle eine axiale Drucköllei­tung mit mindestens einer Verbindungsleitung zu der Nut vorgesehen, wodurch das Zuführen von Drucköl zu den Paßflächen vereinfacht werden kann.An axial pressure oil line with at least one connecting line to the groove is expediently provided in the eccentric shaft, as a result of which the supply of pressure oil to the mating surfaces can be simplified.

Für eine Presse mit zwei Pleueln kann die Vorrichtung auf der Ex­zenterwelle zwei gleichgerichtete Exzenter gleicher Exzentrizität mit darauf gelagerten Exzenterbüchsen gleicher Exzentrizität aufweisen. Der erforderliche Synchronismus der Betätigung ist damit leicht er­zielbar. Falls eine solche Presse mit hoher Hubzahl betrieben werden soll (Schnelläuferpresse), muß im allgemeinen ein Massenausgleich in der Form einer zu dem Stößel gegenläufig bewegbaren Ausgleichsmasse vorgesehen sein. Um deren Hub bei einem Verstellen des Stößelhubes entsprechend zu verstellen und anzupassen, bestehen für die Ausgestal­tung der Vorrichtung insbesondere zwei Möglichkeiten, nämlich entwe­der daß die Exzenterwelle mindestens einen Exzenter aufweist, der min­destens einem anderen Exzenter gleicher Exzentrizität diametral entge­ gengerichtet ist, und daß auf allen Exzentern Exzenterbüchsen gleicher Exzentrizität gelagert sind, oder daß die Exzenterwelle min­destens einen Exzenter aufweist, der mindestens einem Exzenter ab­weichender Exzentrizität diametral entgegengerichtet ist, und daß das Verhältnis der Exzentrizitäten der Exzenterbüchsen zu den Exzentrizi­täten der Exzenter bei allen Exzenter-/Exzenterbüchsenpaarungen gleich ist.For a press with two connecting rods, the device on the eccentric shaft can have two rectified eccentrics of the same eccentricity with eccentric bushes of the same eccentricity mounted on them. The required synchronism of the actuation can thus be easily achieved. If such a press is to be operated with a high number of strokes (high-speed press), mass balancing must generally be provided in the form of a balancing mass that can be moved in the opposite direction to the ram. In order to adjust and adjust their stroke accordingly when adjusting the tappet stroke, there are in particular two options for the design of the device, namely either that the eccentric shaft has at least one eccentric which diametrically opposes at least one other eccentric of the same eccentricity is directed, and that eccentric bushes of the same eccentricity are mounted on all eccentrics, or that the eccentric shaft has at least one eccentric which is diametrically opposed to at least one eccentric, and that the ratio of the eccentricities of the eccentric bushes to the eccentricities of the eccentrics for all eccentric / Eccentric bushing pairings is the same.

Für die Steuerung der Vorrichtung ist es zweckmäßig, daß koaxial auf der Exzenterwelle Winkelgeberscheiben angeordnet sind, von denen mindestens eine drehfest mit der Exzenterwelle verbunden ist und min­destens eine je Exzenterbüchse drehbar auf der Exzenterwelle gelagert und mit der zugeordneten Exzenterbüchse drehfest verbunden ist, und daß jeder Winkelgeberscheibe mindestens ein raumfest angeordneter, kontaktloser Sensor zugeordnet ist.For the control of the device, it is expedient that angular encoder disks are arranged coaxially on the eccentric shaft, at least one of which is non-rotatably connected to the eccentric shaft and at least one per eccentric bushing is rotatably mounted on the eccentric shaft and is non-rotatably connected to the associated eccentric bushing, and that each Angle encoder disk is assigned to at least one fixed contactless sensor.

In der Zeichnung ist ein Ausführungsbeispiel einer Vorrichtung nach der Erfindung in einer Zweipunkt-Schnelläuferpresse mit gegenläu­fig zum Stößel bewegbarer Ausgleichsmasse schematisch dargestellt, und zwar zeigen

  • Fig. 1 einen Schnitt entlang der Linie I-I in Fig. 2,
  • Fig. 2 einen Schnitt entlang der Linie II-II in Fig. 1.
In the drawing, an embodiment of a device according to the invention is shown schematically in a two-point high-speed press with a compensating mass that can be moved in the opposite direction to the ram, namely
  • 1 shows a section along the line II in FIG. 2,
  • FIG. 2 shows a section along the line II-II in FIG. 1.

In einem Gestell 1 ist eine Exzenterwelle 2 gelagert, die mit zwei gleichgerichteten Exzentern 3 und einem diametral entgegengerich­teten Exzenter 4 versehen ist, die sämtlich gleiche Exzentrizitäten aufweisen. Auf den Exzentern 3, 4 sitzen Exzenterbüchsen 5, 6, die ebenfalls gleiche Exzentrizitäten aufweisen. Auf den Exzenterbüchsen 5 sind Pleuel 7 gelagert, die anderenends an einem Stößel 9 angelenkt sind. Auf der Exzenterbüchse 6 ist ein Pleuel 8 gelagert, der anderen­ends an einer Ausgleichsmasse 10 angelenkt ist. Es sind - in der Zeichnung nicht dargestellte - Führungen für die lotrechte Führung des Stößels 9 und der Ausgleichsmasse 10 vorgesehen.In a frame 1 an eccentric shaft 2 is mounted, which is provided with two rectilinear eccentrics 3 and a diametrically opposed eccentric 4, all of which have the same eccentricities. Eccentric bushes 5, 6 are seated on the eccentrics 3, 4 and also have the same eccentricities. Connecting rods 7 are mounted on the eccentric bushes 5 and are articulated on a tappet 9 at the other ends. A connecting rod 8 is mounted on the eccentric bushing 6, which is articulated at the other end to a leveling mass 10. There are guides - not shown in the drawing - for the vertical guidance of the plunger 9 and the balancing mass 10.

Zwischen den zylindrischen Paßflächen außen auf den Exzentern 3, 4 und innen an den Exzenterbüchsen 5, 6 ist je ein Preßverband gebil­det, der durch Zuführen von Drucköl durch eine axiale Druckölleitung 11 und Verbindungsleitungen zu je einer Nut 12 in der Paßfläche jedes Exzenters 3, 4 lösbar ist. Hierfür ist eine - in der Zeichnung nicht dargestellte - Druckölquelle mit nachgeschaltetem Ventil vorgesehen, das auch eine Entlastung der Druckölleitung 11 und damit ein Ablassen des Drucköles ermöglicht.Between the cylindrical mating surfaces outside on the eccentrics 3, 4 and inside on the eccentric bushes 5, 6, a press fit is formed, which by supplying pressure oil through an axial pressure oil line 11 and connecting lines to a groove 12 in the mating surface of each eccentric 3, 4 is solvable. For this purpose, a pressure oil source - not shown in the drawing - with a downstream valve is provided, which also enables the pressure oil line 11 to be relieved and the pressure oil to be drained off.

Auf der Exzenterwelle 2 ist koaxial und drehfest eine Winkelgeber­scheibe 13 befestigt, der ein raumfest in dem Gestell 1 angebrachter Sensor 14 zugeordnet ist. Auf der Exzenterwelle 2 sind koaxial drei Winkelgeberscheiben 15 drehbar gelagert, von denen jede mit einer Ex­zenterbüchse 5, 6 dadurch drehfest verbunden ist, daß die Exzenter­büchse 5, 6 einen einseitig vorragenden Stift 16 aufweist, der in ei­nen Schlitz 17 in der zugeordneten Winkelgeberscheibe 15 eingreift. Jeder der Winkelgeberscheiben 15 ist ein raumfest in dem Gestell 1 an­geordneter, kontaktloser Sensor 24 zugeordnet.On the eccentric shaft 2, an angle encoder disk 13 is fastened coaxially and in a rotationally fixed manner, to which a sensor 14 which is fixed in space in the frame 1 is assigned. On the eccentric shaft 2, three angle encoder disks 15 are rotatably mounted, each of which is rotatably connected to an eccentric sleeve 5, 6 in that the eccentric sleeve 5, 6 has a pin 16 projecting on one side, which engages in a slot 17 in the associated angle encoder disk 15 . Each of the angle encoder disks 15 is assigned a contactless sensor 24 which is fixed in space in the frame 1.

Schließlich weist jede Winkelgeberscheibe 15 - in der Zeichnung nur in Fig. 2 für die der Exzenterbüchse 6 zugeordnete Winkelgeber­scheibe 15 dargestellt - an dem Außenumfang eine Ausnehmung 18 auf, in die ein radial zu der Exzenterwelle 2 gesteuert bewegbarer Bolzen 19 eingreifen kann, der in dem Gestell 1 verschiebbar gelagert ist. Jeder Bolzen 19 weist an seinem rückwärtigen, von der zugeordneten Ausnehmung 18 abgewandten Ende eine Nase 20 auf, die in jeder der bei­den Endlagen des Bolzens 19 mit einem von zwei zugeordneten, kontakt­losen Sensoren 21, 22 zusammenwirkt, die raumfest an dem Gestell 1 be­festigt sind.Finally, each angle encoder disc 15 - shown in the drawing only in FIG. 2 for the angle encoder disc 15 assigned to the eccentric bushing 6 - has a recess 18 on the outer circumference, into which a bolt 19, which can be moved and controlled radially to the eccentric shaft 2, can engage, which can be engaged in the Frame 1 is slidably mounted. Each bolt 19 has at its rear end, facing away from the associated recess 18, a nose 20 which interacts in each of the two end positions of the bolt 19 with one of two associated, contactless sensors 21, 22 which are fixed in space on the frame 1 .

Bei einem Verstellen des Stößelhubes mittles dieser Vorrichtung wird folgendermaßen vorgegangen. Nach Stillsetzen der Presse wird die Exzenterwelle 2 mit Exzentern 3, 4, darauf festsitzenden Exzenterbüch­sen 5, 6 und damit verbundenen Winkelgeberscheiben 13, 15 im Schleich­gang in eine Anfangsstellung gedreht. Diese Anfangsstellung ent­spricht dem noch eingestellten Stößelhub und ist dadurch bestimmt, daß in dieser Anfangsstellung für das einzuleitende Verstellen des Stößelhubes die Bolzen 19 in die Ausnehmungen 18 eingreifen können und an den Winkelgeberscheiben 15 vorgesehene Initiatoren 23 den zuge­ordneten Sensoren 24 gegenüberstehen. Das Erreichen dieser Anfangs­stellung wird von den Sensoren 24 gemeldet und damit die Exzenterwel­le 2 durch Abschalten des Antriebes des Schleichganges stillgesetzt. Dann werden die Bolzen 19 radial einwärts betätigt, die dadurch in die Ausnehmungen 18 eingreifen und die Winkelgeberscheiben 15 und die Exzenterbüchsen 5, 6 im Drehsinne festsetzen. Dieser Zustand wird durch die radial inneren Sensoren 21 gemeldet, denen die Nasen 20 an dem Bolzen 19 gegenüberstehen. Durch Zuführen von Drucköl durch die axiale Druckölleitung 11 zu den Paßflächen der Preßverbände werden dann letztere gelöste. Darauf wird die Exzenterwelle 2 mit den Exzen­ tern 3, 4 durch den Antrieb des Schleichganges entsprechend dem vorge­wählten Stößelhub verdreht. Der hierfür erforderliche Drehwinkelweg oder die hierfür erforderliche absolute Drehwinkelstellung wird durch die Winkelgeberscheibe 13 und den zugeordneten Sensor 14 erfaßt. Bei Erreichen der richtigen Drehwinkelstellung der Exzenterwelle 2 wird durch Abschalten des Antriebes des Schleichganges die Exzenterwelle 2 wieder stillgesetzt. Darauf wird das Drucköl entspannt, wodurch die Preßverbände zwischen den Exzentern 3, 4 und den Exzenterbüchsen 5, 6 wieder hergestellt werden. Danach werden die Bolzen 19 radial aus­wärts betätigt, so daß diese nicht mehr in die Ausnehmungen 18 ein­greifen. Dieser Zustand wird durch die radial äußeren Sensoren 22 ge­meldet, denen die Nasen 20 an den Bolzen 19 gegenüberstehen. Damit ist die Presse mit dem neu eingestellten Stößelhub betriebsbereit.When adjusting the ram stroke by means of this device, the procedure is as follows. After the press has stopped, the eccentric shaft 2 with eccentrics 3, 4, eccentric bushes 5, 6 fixed thereon and associated angle encoder disks 13, 15 is rotated into an initial position at creep speed. This initial position corresponds to the plunger stroke that is still set and is determined in that in this initial position for the adjustment of the plunger stroke to be initiated, the bolts 19 can engage in the recesses 18 and initiators 23 provided on the angle encoder disks 15 face the assigned sensors 24. The reaching of this initial position is signaled by the sensors 24 and the eccentric shaft 2 is thus stopped by switching off the creep speed drive. Then the bolts 19 are actuated radially inwards, which thereby engage in the recesses 18 and fix the angle encoder disks 15 and the eccentric bushes 5, 6 in the direction of rotation. This state is reported by the radially inner sensors 21, which the lugs 20 on the bolt 19 face. By supplying pressure oil through the axial pressure oil line 11 to the mating surfaces of the press dressings, the latter are then released. Then the eccentric shaft 2 with the eccentric tern 3, 4 rotated by the crawl speed drive according to the preselected ram stroke. The angle of rotation path required for this or the absolute angle of rotation position required for this is detected by the angle encoder disk 13 and the associated sensor 14. When the correct angular position of the eccentric shaft 2 is reached, the eccentric shaft 2 is stopped again by switching off the creep speed drive. Then the pressure oil is released, whereby the press fit between the eccentrics 3, 4 and the eccentric bushes 5, 6 are restored. Then the bolts 19 are actuated radially outward so that they no longer engage in the recesses 18. This state is reported by the radially outer sensors 22, which the lugs 20 on the bolts 19 face. The press is now ready for operation with the newly set slide stroke.

Die richtige Drehwinkelstellung der Exzenterbüchsen 5, 6 auf den Exzentern 3, 4 kann dadurch überwacht werden, daß der Synchronismus des Auftretens der Signale an den Sensoren 24 überwacht wird. Bei Auf­treten einer Abweichung von dem Synchronismus kann die richtige Dreh­winkelstellung der Exzenterbüchsen 5, 6 auf den Exzentern 3, 4 da­durch wieder hergestellt werden, daß die Preßverbände gelöst, die Bol­zen 19 radial einwärts beaufschlagt und die Exzenterwelle 2 verdreht wird, bis alle Bolzen 19 in die Ausnehmungen 18 eingreifen, was durch die Sensoren 21 angezeigt werden kann. Damit ist der Synchronismus wieder hergestellt; die Preßverbände können wieder hergestellt wer­den.The correct angle of rotation position of the eccentric bushes 5, 6 on the eccentrics 3, 4 can be monitored by monitoring the synchronism of the occurrence of the signals at the sensors 24. In the event of a deviation from the synchronism, the correct rotational angle position of the eccentric bushes 5, 6 on the eccentrics 3, 4 can be restored by loosening the compression fittings, applying the bolts 19 radially inwards and rotating the eccentric shaft 2 until all bolts 19 in the recesses 18 engage, which can be indicated by the sensors 21. With this, the synchronism is restored; the bandages can be restored.

Claims (8)

1. Vorrichtung an einer Presse mit Exzenterwelle (2) zum Verstel­len des Stößelhubes durch Verstellen der resultierenden Exzentrizität eines Exzenters (3, 4) und einer darauf gelagerten Exzenterbüchse (5, 6), auf der ein Pleuel (7, 8) gelagert ist, wobei die Exzenterbüchse (5, 6) auf dem Exzenter (3, 4) durch Betätigungsmittel wahlweise im Drehsinne lösbar und festlegbar ist, und wobei die gelöste Exzenter­büchse (5, 6) an einem nicht mit der Exzenterwelle (2) drehenden Teil festlegbar und in diesem festgelegten Zustand die Exzenterwelle (2) zwecks Verstellens des Stößelhubes verdrehbar ist, dadurch gekennzeichnet, daß die Lagerung der Exzenterbüchse (5, 6) auf dem ein Übermaß aufweisenden Exzenter (3, 4) ein zwischen diesen bei­den Teilen hergestellter Preßverband mit zylindrischen Paßflächen ist, der durch Zuführen von Drucköl über mindestens eine Nut (12) in mindestens einer Paßfläche lösbar ist.1. Device on a press with an eccentric shaft (2) for adjusting the ram stroke by adjusting the resulting eccentricity of an eccentric (3, 4) and an eccentric bushing (5, 6) mounted thereon, on which a connecting rod (7, 8) is mounted, wherein the eccentric bushing (5, 6) on the eccentric (3, 4) can be detachably and fixed in the direction of rotation by actuating means, and wherein the released eccentric bushing (5, 6) can be fixed on a part not rotating with the eccentric shaft (2) and in In this defined state, the eccentric shaft (2) can be rotated for the purpose of adjusting the tappet stroke, characterized in that the bearing of the eccentric bushing (5, 6) on the excess eccentric (3, 4) is a press fit with cylindrical fitting surfaces produced between these two parts which can be released in at least one mating surface by supplying pressure oil via at least one groove (12). 2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß der Preßverband zwischen der Exzenterbüchse (5, 6) und dem Exzen­ter (3, 4) bei Vorhandensein einer Temperaturdifferenz zwischen die­sen beiden Teilen hergestellt ist.2. Device according to claim 1, characterized in that the interference fit between the eccentric bush (5, 6) and the eccentric (3, 4) is made in the presence of a temperature difference between these two parts. 3. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß der Preßverband zwischen der Exzenterbüchse (5, 6) und dem Exzen­ter (3, 4) mittels Durckmittelbeaufschlagung des von der zylindri­schen Paßfläche in der Exzenterbüchse (5, 6) begrenzten Hohlraumes hergestellt ist.3. Apparatus according to claim 1, characterized in that the interference fit between the eccentric sleeve (5, 6) and the eccentric (3, 4) by means of pressurization of the cavity by the cylindrical mating surface in the eccentric sleeve (5, 6) is made. 4. Vorrichtung nach Anspruch 1, 2 oder 3, dadurch gekenn­zeichnet, daß in der Exzenterwelle (2) eine axiale Druckölleitung (11) mit mindestens einer Verbindungsleitung zu der Nut (12) vorgese­hen ist.4. Apparatus according to claim 1, 2 or 3, characterized in that an axial pressure oil line (11) with at least one connecting line to the groove (12) is provided in the eccentric shaft (2). 5. Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, daß die Exzenterwelle (2) zwei gleichgerichtete Exzenter (3) gleicher Exzentrizität mit darauf gelagerten Exzenterbüchsen (5) gleicher Ex­zentrizität aufweist.5. The device according to claim 4, characterized in that the eccentric shaft (2) has two rectified eccentrics (3) of the same eccentricity with eccentric bushings (5) mounted thereon of the same eccentricity. 6. Vorrichtung nach Anspruch 4 oder 5, dadurch gekennzeich­net, daß die Exzenterwelle (2) mindestens einen Exzenter (3) auf­weist, der mindestens einem anderen Exzenter (4) gleicher Exzentrizi­tät diametral entgegengerichtet ist, und daß auf allen Exzentern (3, 4) Exzenterbüchsen (5, 6) gleicher Exzentrizität gelagert sind.6. Apparatus according to claim 4 or 5, characterized in that the eccentric shaft (2) has at least one eccentric (3) which is diametrically opposed to at least one other eccentric (4) of the same eccentricity, and that on all eccentrics (3, 4) Eccentric bushes (5, 6) of the same eccentricity are stored. 7. Vorrichtung nach Anspruch 4 oder 5, dadurch gekennzeich­net, daß die Exzenterwelle (2) mindestens einen Exzenter auf­weist, der mindestens einem Exzenter abweichender Exzentrizität diame­tral entgegengerichtet ist, und daß das Verhältnis der Exzentrizitä­ten der Exzenterbüchsen zu den Exzentrizitäten der Exzenter bei allen Exzenter-/Exzenterbüchsenpaarungen gleich ist.7. The device according to claim 4 or 5, characterized in that the eccentric shaft (2) has at least one eccentric, which is diametrically opposed to at least one eccentric deviating eccentricity, and that the ratio of the eccentricities of the eccentric bushes to the eccentricities of the eccentric in all eccentric / Eccentric bushing pairings is the same. 8. Vorrichtung nach einem der vorhergehenden Ansprüche, da­durch gekennzeichnet, daß koaxial auf der Exzenterwelle (2) Winkelgeberscheiben (13, 15) angeordnet sind, von denen mindestens ei­ne (13) drehfest mit der Exzenterwelle verbunden ist und mindestens eine (15) je Exzenterbüchse (5, 6) drehbar auf der Exzenterwelle (2) gelagert und mit der zugeordneten Exzenterbüchse (5, 6) drehfest ver­bunden ist, und daß jeder Winkelgeberscheibe (13, 15) mindestens ein raumfest angeordneter, kontaktloser Sensor (14, 24) zugeordnet ist.8. Device according to one of the preceding claims, characterized in that coaxial on the eccentric shaft (2) angle encoder disks (13, 15) are arranged, of which at least one (13) is rotatably connected to the eccentric shaft and at least one (15) per eccentric bushing (5, 6) rotatably mounted on the eccentric shaft (2) and connected to the associated eccentric bush (5, 6) in a rotationally fixed manner, and that each angle encoder disc (13, 15) is assigned at least one fixed contactless sensor (14, 24) .
EP86107769A 1986-06-06 1986-06-06 Apparatus for adjusting the slide stroke of a press with an excentric shaft Expired - Lifetime EP0248917B1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP86107769A EP0248917B1 (en) 1986-06-06 1986-06-06 Apparatus for adjusting the slide stroke of a press with an excentric shaft
DE8686107769T DE3677597D1 (en) 1986-06-06 1986-06-06 DEVICE ON A PRESS WITH Eccentric Shaft To Adjust The Tappet Stroke.
US07/057,358 US4785732A (en) 1986-06-06 1987-06-03 Push rod stroke adjustment device for a press
ES8701656A ES2005247A6 (en) 1986-06-06 1987-06-05 Apparatus for adjusting the slide stroke of a press with an excentric shaft.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP86107769A EP0248917B1 (en) 1986-06-06 1986-06-06 Apparatus for adjusting the slide stroke of a press with an excentric shaft

Publications (2)

Publication Number Publication Date
EP0248917A1 true EP0248917A1 (en) 1987-12-16
EP0248917B1 EP0248917B1 (en) 1991-02-20

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EP86107769A Expired - Lifetime EP0248917B1 (en) 1986-06-06 1986-06-06 Apparatus for adjusting the slide stroke of a press with an excentric shaft

Country Status (4)

Country Link
US (1) US4785732A (en)
EP (1) EP0248917B1 (en)
DE (1) DE3677597D1 (en)
ES (1) ES2005247A6 (en)

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EP0503367A2 (en) * 1991-03-08 1992-09-16 The Minster Machine Company Single reciprocating dynamic balancer for a double action stamping press
FR2681007A1 (en) * 1991-09-10 1993-03-12 Grabener Theodor Pressen Devices for adjusting the travel of eccentric presses
EP0535476A2 (en) * 1991-10-04 1993-04-07 SCHULER PRESSEN GmbH & Co. Apparatus for adjusting the slide stroke and a counterweight on a press
EP0551919A1 (en) * 1992-01-17 1993-07-21 Werkzeugmaschinen GmbH Zeulenroda Synchronized, adjustable dynamic balancer for eccenter driven press or punch with automatic stroke adjustment
FR2741006A1 (en) * 1995-11-13 1997-05-16 Minster Machine Co MECHANICAL PRESS PROVIDED WITH AN ADJUSTABLE TRAVEL LINK
EP0941831A1 (en) * 1998-03-11 1999-09-15 Schuler Pressen GmbH & Co. KG Eccentric press with controlled positioning of the main shaft
CN104960234B (en) * 2015-07-28 2016-08-03 济南精创模具技术开发有限公司 Biomass forming machine eccentric installs axle

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CH672173A5 (en) * 1986-04-28 1989-10-31 Bruderer Ag
EP0250871B1 (en) * 1986-06-30 1990-08-08 Aida Engineering Ltd. Slide stroke variable device for a press
CH677336A5 (en) * 1988-08-31 1991-05-15 Bruderer Ag
CA2037500A1 (en) * 1990-03-05 1991-09-06 Masakatsu Shiga Apparatus for adjusting a slide stroke of a press machine
US5109766B1 (en) * 1990-10-31 1994-03-22 Minster Machine Co Adjustable stroke punch press
DE4219405C2 (en) * 1992-06-13 1994-04-21 Hensel Eisenwerk Eccentric press with variable ram stroke
US5349902A (en) * 1993-04-20 1994-09-27 The Minster Machine Company Press shutheight adjustment mechanism
US5398601A (en) * 1993-04-20 1995-03-21 The Minster Machine Company Press shutheight adjustment in motion mechanism
US5345861A (en) * 1993-04-20 1994-09-13 The Minater Machine Company Press adjustment screw mechanism
US5446955A (en) * 1993-10-08 1995-09-05 Mitsubishi Heavy Industries America, Inc. Mold height extension method
US5865070A (en) * 1996-10-28 1999-02-02 The Minster Machine Company Adjustable stroke connection
US6032360A (en) * 1997-02-07 2000-03-07 The Minster Machine Company Tool and method to adjust eccentric timing on adjustable stroke crankshaft
DE19810406A1 (en) * 1998-03-11 1999-09-16 Schuler Pressen Gmbh & Co Eccentric press with variable slide movement
JP2001300798A (en) * 2000-04-25 2001-10-30 Aida Eng Ltd Stroke adjusting device of press machine
US6676323B2 (en) 2000-12-29 2004-01-13 The Minster Machine Company Adjustable clamping device in a mechanical press
US6647869B2 (en) * 2002-04-02 2003-11-18 The Minster Machine Company Positive lock for infinite adjustable stroke mechanism
ITMI20031783A1 (en) * 2003-09-18 2005-03-19 Donato Manera DEVICE TO ADJUST THE STROKE OF A MECHANICAL PRESS AND METHOD TO REGULATE THESE STROKES BY MEANS OF THIS DEVICE
EP1764882B1 (en) * 2005-09-19 2008-07-16 komax Holding AG Crimping press
US8025346B2 (en) * 2006-12-15 2011-09-27 Caterpillar Inc. Machine component configuration for enhanced press fit and press fit coupling method
CN111055529A (en) * 2019-12-31 2020-04-24 宁波精达成形装备股份有限公司 Press machine with dynamic balancing mechanism

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0503367A2 (en) * 1991-03-08 1992-09-16 The Minster Machine Company Single reciprocating dynamic balancer for a double action stamping press
EP0503367A3 (en) * 1991-03-08 1993-02-24 The Minster Machine Company Single reciprocating dynamic balancer for a double action stamping press
FR2681007A1 (en) * 1991-09-10 1993-03-12 Grabener Theodor Pressen Devices for adjusting the travel of eccentric presses
EP0535476A2 (en) * 1991-10-04 1993-04-07 SCHULER PRESSEN GmbH & Co. Apparatus for adjusting the slide stroke and a counterweight on a press
EP0535476A3 (en) * 1991-10-04 1993-06-02 SCHULER PRESSEN GmbH & Co. Apparatus for adjusting the slide stroke and a counterweight on a press
DE4132976C2 (en) * 1991-10-04 2003-04-17 Schuler Pressen Gmbh & Co Device on a press for adjusting the strokes of a working ram and a counter-vibration mass
EP0551919A1 (en) * 1992-01-17 1993-07-21 Werkzeugmaschinen GmbH Zeulenroda Synchronized, adjustable dynamic balancer for eccenter driven press or punch with automatic stroke adjustment
DE4201095A1 (en) * 1992-01-17 1993-07-22 Raster Maschinen Gmbh SYNCHRONOUSLY ADJUSTABLE DYNAMIC MASS COMPENSATION ON EXCENTRIC PRESSES OR PUNCHES WITH AUTOMATIC LIFT ADJUSTMENT
FR2741006A1 (en) * 1995-11-13 1997-05-16 Minster Machine Co MECHANICAL PRESS PROVIDED WITH AN ADJUSTABLE TRAVEL LINK
EP0941831A1 (en) * 1998-03-11 1999-09-15 Schuler Pressen GmbH & Co. KG Eccentric press with controlled positioning of the main shaft
CN104960234B (en) * 2015-07-28 2016-08-03 济南精创模具技术开发有限公司 Biomass forming machine eccentric installs axle

Also Published As

Publication number Publication date
DE3677597D1 (en) 1991-03-28
EP0248917B1 (en) 1991-02-20
US4785732A (en) 1988-11-22
ES2005247A6 (en) 1989-03-01

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