EP0314975B1 - Press with locking devices for the slide - Google Patents

Press with locking devices for the slide Download PDF

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Publication number
EP0314975B1
EP0314975B1 EP88117287A EP88117287A EP0314975B1 EP 0314975 B1 EP0314975 B1 EP 0314975B1 EP 88117287 A EP88117287 A EP 88117287A EP 88117287 A EP88117287 A EP 88117287A EP 0314975 B1 EP0314975 B1 EP 0314975B1
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EP
European Patent Office
Prior art keywords
locking
locking bar
bolts
press
bar
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 - Lifetime
Application number
EP88117287A
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German (de)
French (fr)
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EP0314975A1 (en
Inventor
Hermann Braun
Kurt Strommer
Eckhard Dr.-Ing. Brangs
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L Schuler GmbH
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L Schuler GmbH
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Publication of EP0314975A1 publication Critical patent/EP0314975A1/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B30PRESSES
    • B30BPRESSES IN GENERAL
    • B30B15/00Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/28Arrangements for preventing distortion of, or damage to, presses or parts thereof
    • B30B15/287Arrangements for preventing distortion of, or damage to, presses or parts thereof preventing unintended ram movement, e.g. using blocking devices

Definitions

  • the invention relates to a press of the type specified in the preamble of claim 1.
  • DE-OS 20 45 894 describes a hydraulic drawing press with locking devices for several plungers.
  • the locking devices consist of racks and locking claws encircling their toothing.
  • the plungers of displaceably mounted locking claws can be moved using hydraulic actuating means. The disengagement from the connection with the racks takes place against a mechanical return spring. A lowering movement of the plunger is required to ensure that it engages properly. The locked position is not secured.
  • US Pat. No. 4,304,540 Another device for securing the ram of a press is shown in US Pat. No. 4,304,540.
  • the ram of the press is secured in several ways.
  • pressure rods are rigidly connected to the plunger, which are guided through press-fitted housings which serve to receive and move the locking bolts.
  • the locking bolts can be guided radially against the push rod in guide means by means of adjusting means.
  • Each push rod has grooves in the locking areas, into which the locking bolts can engage with correspondingly designed areas.
  • the locking bolts are secured against movement from the locking position via a common cone ring.
  • Each locking device requires a large number of adjusting means for performing the functions and it is necessary to lift the plunger into a precisely predetermined position so that the shape areas on the locking bolts match the height of the shape areas, grooves, on the locking bars.
  • the invention is based on the DD-A3-226 147, which shows a press with a ram that can be removed and stored.
  • Locking devices are provided for the plunger between press-fixed areas and the plunger. Each locking device has a locking rod with a circumferential groove in the manner of a thread.
  • the locking bar is attached to the press.
  • Locking bolts which are movable in their longitudinal axis and which are designed in accordance with the groove shape, interact with the groove via adjusting means. If the groove and locking bolt do not match, the locking rod must be turned. The locking position is secured by the locking bolt and the connecting lugs actuating the locking bolt being in the extended position (dead center position).
  • the position of the plunger can be locked without having to change the position of the plunger to achieve the positive locking required for the locking.
  • the movable components of the locking device must be fixed in a press (frame) manner.
  • the downward and upward movements of the plunger and the movement of the locking bars are not in one direction of movement when the locking position is found. It is also essential to the invention that the movements of the locking bars towards the locking bar, the locking in this position, the movement away from the locking bar and the locking of the locking bars in the position releasing the locking bar are achieved by a single curve piece acting on all locking bars of a locking device will. Due to the freely movable mounting of the locking bolts in the directions of movement transverse to the lowering and lifting movement of the plunger, the plunger can be securely secured in spite of movement movements which cannot be avoided.
  • Fig. 1 shows a two-column press with a head piece 2, a ram 3 which is mounted in guides and via a drive, of which two connecting rods 6 can be seen, up and down in the direction of the double arrow 4 and a press table 7.
  • locking devices 8 which act on one, all common servomotor or, as shown, individual servomotors 12 on a locking rod 9 on the plunger 3.
  • Fig. 2 only one half of a locking device is shown, since the housing 13, the housing cover 14, a worm wheel 37, a locking guide 17 and a cam ring 29 in this embodiment, like the locking rod 9, are rotationally symmetrical components. With this construction, a plurality of locking bolts 23 can be guided against the locking rod 9 at the same time. However, it is also envisaged for an embodiment using a helical rack and linear movement of a double curve corresponding to the cam ring 29.
  • the worm wheel 37 is rotatably inserted into the housing 13, which is kept closed by the housing cover 14.
  • the worm wheel 37 can be driven by the servo motor 12 to the left and to the right by means of a worm.
  • the cam ring 29 is carried here via a driver 38, which serves as a compensating clutch and in the rubber-elastic middle part cylindrical pins 39 are inserted, which engage in a groove 41 in the worm wheel 37 and in the cam ring 29.
  • the cam ring 29 has, as is also shown in FIGS. 3a to 3e, a first control curve 31, a second control curve 32 and an annular groove 35 with the end faces 36 as contact surfaces.
  • a bolt guide 17 is rotatably mounted in the housing cover 14. Between the housing cover 14 and the bolt guide 17 there is a catch-like anti-rotation lock with a catch 19 which engages in a recess 18 in the bolt guide 17 under the pressure of a spring 21, which is supported in a closure piece 22.
  • the bolt guide 17 serves for the radial guidance of a number, for example three locking bolts 23.
  • the locking bolts 23 are movably mounted in the bolt guide 17 in the direction of the locking rod 9 and away from it.
  • Bolt guide 17 and cam ring 29 also allow the locking bolts 23 to move sideways in accordance with the directions of movement indicated by the two double arrows 30 in FIG. 3b, in order to compensate for inaccuracies in the delivery of the locking rod 9 as a result of a more or less large play in the ram guide.
  • each locking bolt 23 a longitudinal bore 26 is made in the direction of the movement of the locking bolt 23 against the locking rod 9.
  • a curve follower piece 28 is inserted, which is constantly pressed under the pressure of a spring 27 against the first control cam 31.
  • the locking bolt 23 is preloaded in the direction of the locking rod 9.
  • a pin 33 is further inserted, which cooperates with the second cam 32 on the cam ring 29, and a cylinder pin 34, which engages in the annular groove 35 and comes to rest on one of the end faces 36 when the cam ring 29 rotates the or the locking bolt 23.
  • Arrow 16 indicates the bore in the housing cover 14 and the cylindrical housing 13.
  • the toothings on locking rod 9 and locking bolt 23 are indicated by 11 and 24, respectively.
  • the toothing itself can be a movement thread, for example a trapezoidal or saw thread.
  • the locking bolts 23 can be segments which have been cut out of a nut which has the same thread as the locking rod 9.
  • a locking rod 9 is indicated with a movement thread 11.
  • Three locking bolts 23 are also indicated, which are placed against the outer jacket of the locking rod 9. This representation corresponds to the phase in which the locking bolts 23 are to be rotated in a horizontal plane around the locking rod 9 in order to be able to engage in the groove or the threads on the locking rod 9.
  • FIGS. 3a to 3e The locking process for securing the raised position of the plunger 3 in the individual phases is shown in FIGS. 3a to 3e.
  • FIG. 3a shows the unlocked state.
  • the locking bolt 23 is prevented from moving by the spring 27 against the locking rod 9 by the cylindrical pin 33 on the second control cam 32. If the cam ring 29 is now moved in the direction of the arrow 44, the cylinder pin 33 is released from the second control cam 32 and the locking bolt 23 is guided against the locking rod 9 under the pressure of the spring 27 when the cam follower piece 28 bears against the first control cam 31.
  • locking bars 23 generally initially rest against the locking bar 9, as is also shown in FIG. 5a.
  • the catch 19 prevents the locking bar guide 17 and thus the locking bar 23 from rotating about the locking rod 9.
  • the length of the annular groove 35 (FIG.
  • each locking bolt 23 is rotated under contact with the locking rod 9 as a result of the pressure action of the spring 27 and the rotary movement of the worm wheel 37, cam ring 29 and locking guide 17 until the teeth of the locking bolts 23 match the gears of the locking rod 9.
  • each locking bolt 23 is further adjusted by means of the pressure of the spring 27 before and in which or the gears of the locking rod 9, shown in FIGS.

Description

Die Erfindung betrifft eine Presse der im Oberbegriff des Anspruchs 1 angegebenen Art.The invention relates to a press of the type specified in the preamble of claim 1.

In Pressen ist es erforderlich, den elektromotorisch oder auch hydraulisch (ab und auf) bewegten Stößel an einer außertaktmäßigen Abwärtsbewegung zu hindern.In presses, it is necessary to prevent the plunger, which is moved by an electric motor or hydraulically (up and down), from moving downwards in an out-of-cycle manner.

Die DE-OS 20 45 894 beschreibt eine hydraulische Ziehpresse mit Verriegelungsvorrichtungen für mehrere Stößel. Die Verriegelungsvorrichtungen bestehen aus Zahnstangen und in deren Verzahnungen einfassende Verriegelungsklauen. Die Stößel verschieblich gelagerten Verriegelungsklauen sind über hydraulische Stellmittel bewegbar. Die Ausrückung aus der Verbindung mit den Zahnstangen erfolgt gegen jeweils eine mechanische Rückstellfeder. Zum einwandfreien Einrasten ist eine Absenkbewegung des Stößels erforderlich. Die Raststellung ist nicht gesichert.DE-OS 20 45 894 describes a hydraulic drawing press with locking devices for several plungers. The locking devices consist of racks and locking claws encircling their toothing. The plungers of displaceably mounted locking claws can be moved using hydraulic actuating means. The disengagement from the connection with the racks takes place against a mechanical return spring. A lowering movement of the plunger is required to ensure that it engages properly. The locked position is not secured.

Eine weitere Einrichtung zur Sicherung des Stößels einer Presse ist in der US-PS 4,304,540 gezeigt. Der Stößel der Presse wird in mehreren Punkten abgesichert. Hierzu sind Druckstangen mit dem Stößel starr verbunden, die durch pressenfest angebrachte Gehäuse hindurchgeführt sind, die der Aufnahme und der beweglichen Lagerung von Sperriegeln dienen. Die Sperriegel sind in Führungsmitteln vermittels Stellmittel radial gegen die Druckstange führbar. Jede Druckstange weist in den Feststellbereichen Rillen auf, in die die Sperriegel mit entsprechend gestalteten Bereichen eingreifen können. Die Sperriegel sind über einen gemeinsamen Konusring gegen eine Bewegung aus der Verriegelungsstellung gesichert. Jede Verriegelungseinrichtung benötigt für die Ausübung der Funktionen eine Vielzahl von Stellmitteln und es ist erforderlich, den Stößel in eine genau vorgegebene Position anzuheben, damit die Formbereiche an den Sperriegeln mit den Formbereichen, Rillen, an den Sperrstangen höhenmäßig übereinstimmen.Another device for securing the ram of a press is shown in US Pat. No. 4,304,540. The ram of the press is secured in several ways. For this purpose, pressure rods are rigidly connected to the plunger, which are guided through press-fitted housings which serve to receive and move the locking bolts. The locking bolts can be guided radially against the push rod in guide means by means of adjusting means. Each push rod has grooves in the locking areas, into which the locking bolts can engage with correspondingly designed areas. The locking bolts are secured against movement from the locking position via a common cone ring. Each locking device requires a large number of adjusting means for performing the functions and it is necessary to lift the plunger into a precisely predetermined position so that the shape areas on the locking bolts match the height of the shape areas, grooves, on the locking bars.

Die Erfindung geht aus von der DD-A3-226 147, die eine Presse zeigt mit einem Stößel, der ab- und aufbewegbar ist. Für den Stößel sind Verriegelungseinrichtungen vorgesehen zwischen pressenfesten Bereichen und dem Stößel. Jede Verriegelungseinrichtung weist eine Sperrstange mit umlaufender Nut in Art eines Gewindes auf. Die Sperrstange ist pressenfest angebracht. Mit der Nut wirken über Stellmittel in ihrer Längsachse bewegbare Sperriegel zusammen, die entsprechend der Nutausformung ausgebildet sind. Bei Nicht-Übereinstimmung von Nut und Sperriegel ist die Sperrstange zu drehen. Die Sperrlage ist gesichert, indem Sperriegel und die den Sperriegel betätigende Verbindungslaschen sich in Strecklage (Totpunktlage) befinden.The invention is based on the DD-A3-226 147, which shows a press with a ram that can be removed and stored. Locking devices are provided for the plunger between press-fixed areas and the plunger. Each locking device has a locking rod with a circumferential groove in the manner of a thread. The locking bar is attached to the press. Locking bolts, which are movable in their longitudinal axis and which are designed in accordance with the groove shape, interact with the groove via adjusting means. If the groove and locking bolt do not match, the locking rod must be turned. The locking position is secured by the locking bolt and the connecting lugs actuating the locking bolt being in the extended position (dead center position).

Es ist Aufgabe der Erfindung, einerseits axiale, in Erstreckung der Sperrstangen verlaufende Bewegungen und Zustellbewegungen zum Erreichen der Verriegelungsstellung zu vermeiden und die Steigung einer gewindeartig verlaufenden Nut, ggf. die Steigung eines Bewegungsgewindes zum Auffinden der Verriegelungsstellung zu nutzen, damit der Stössel in jeder beliebigen Stellung verriegelbar ist, ohne daß zum Erreichen des für die Verriegelung erforderlichen Formschlusses mit der Sperrstange die Stellung des Stößels verändert werden muß. Andererseits sind die beweglichen Bauelemente der Verriegelungseinrichtung pressen- (gestell-)fest anzuordnen.It is an object of the invention, on the one hand, to avoid axial movements in the extension of the locking rods and infeed movements to reach the locking position and to use the pitch of a thread-like groove, possibly the pitch of a movement thread, to find the locking position, so that the plunger is in any position The position of the plunger can be locked without having to change the position of the plunger to achieve the positive locking required for the locking. On the other hand, the movable components of the locking device must be fixed in a press (frame) manner.

Diese Aufgabe ist gelöst durch die Merkmale des Anspruchs 1. Die Merkmale der weiteren Ansprüche stellen bevorzugte und für sich erfinderische Ausgestaltungen dar.This object is achieved by the features of claim 1. The features of the further claims represent preferred and inventive configurations.

Durch die Nutzung der Steigung einer umlaufenden Nut oder eines Bewegungsgewindes zum Auffinden der Verriegelungsstellung liegen die ab- und aufwärtsgerichteten Bewegungen des Stößels und die Bewegung der Sperriegel bei dem Auffinden der Verriegelungsstellung nicht in einer Bewegungsrichtung. Weiterhin erfindungswesentlich ist es, daß die Bewegungen der Sperriegel auf die Sperrstange zu, die Verriegelung in dieser Lage, die Bewegung von der Sperrstange weg und die Verriegelung der Sperriegel in der die Sperrstange freigebenden Lage von einem einzigen, auf alle Sperriegel einer Verriegelungseinrichtung wirkenden Kurvenstück erreicht werden. Durch die frei bewegliche Lagerung der Sperriegel in Bewegungsrichtungen quer zur Senk- und Hebebewegung des Stößels ist der Stößel trotz nicht verMeidbarer Bewegungsspiele einwandfrei sicherbar.By using the slope of a circumferential groove or a movement thread to find the locking position, the downward and upward movements of the plunger and the movement of the locking bars are not in one direction of movement when the locking position is found. It is also essential to the invention that the movements of the locking bars towards the locking bar, the locking in this position, the movement away from the locking bar and the locking of the locking bars in the position releasing the locking bar are achieved by a single curve piece acting on all locking bars of a locking device will. Due to the freely movable mounting of the locking bolts in the directions of movement transverse to the lowering and lifting movement of the plunger, the plunger can be securely secured in spite of movement movements which cannot be avoided.

Anhand eines in der Zeichnung dargestellten Ausführungsbeispiels soll die Erfindung im Folgenden näher erläutert werden. Dabei zeigen:

Fig. 1
eine Presse mit der Einrichtung nach der Erfindung,
Fig. 2
eine Einrichtung nach der Erfindung in einer Schnittdarstellung,
Fign. 3 a bis 3 e
hintereinanderfolgend dargestellt die durch einen Kurvenring bewirkten Stellungen eines Sperriegels,
Fig. 4
gegen den Umfang der Sperrstange im Bereich der umlaufenden Nut angelegte Sperriegel und
Fign. 5 a und 5 b
die vorderen Bereiche eines Sperriegels vor bzw. während des Eingriffs in die Sperrstange.
Based on an embodiment shown in the drawing, the invention will be explained in more detail below. Show:
Fig. 1
a press with the device according to the invention,
Fig. 2
a device according to the invention in a sectional view,
Fig. 3 a to 3 e
successively shown the positions of a locking bolt caused by a cam ring,
Fig. 4
against the circumference of the locking rod in the area of the circumferential groove locking bars and
Fig. 5 a and 5 b
the front areas of a locking bolt before or during the engagement in the locking rod.

Die Erfindung ist nicht eingeschränkt auf die Pressenart, hydraulische oder mechanische Pressen, oder auf Pressen mit bestimmter Anzahl an Ständern. So zeigt Fig. 1 beispielsweise eine Zwei-StänderPresse mit einem Kopfstück 2, einem in Führungen gelagerten und über einen Antrieb, von dem zwei Pleuel 6 erkennbar sind, ab und auf in Richtung des Doppelpfeiles 4 bewegbaren Stößel 3 und einem Pressentisch 7. In z.B. vier Eckbereichen des Stößels 3 greifen Verriegelungseinrichtungen 8 an, die über einen, allen gemeinsamen Stellmotor oder über, wie gezeigt, einzelne Stellmotore 12 auf je eine Sperrstange 9 an dem Stößel 3 einwirken.The invention is not restricted to the type of press, hydraulic or mechanical presses, or to presses with a certain number of stands. For example, Fig. 1 shows a two-column press with a head piece 2, a ram 3 which is mounted in guides and via a drive, of which two connecting rods 6 can be seen, up and down in the direction of the double arrow 4 and a press table 7. In e.g. Four corner areas of the plunger 3 engage locking devices 8, which act on one, all common servomotor or, as shown, individual servomotors 12 on a locking rod 9 on the plunger 3.

In Fig. 2 ist nur eine Hälfte einer Verriegelungseinrichtung gezeigt, da das Gehäuse 13, der Gehäusedeckel 14, ein Schneckenrad 37, eine Riegelführung 17 und ein Kurvenring 29 in diesem Ausführungsbeispiel, wie auch die Sperrstange 9, rotationssymmetrische Bauteile sind. Durch diesen Aufbau sind gleichzeitig mehrere Sperriegel 23 gegen die Sperrstange 9 zu führen. Es ist jedoch auch an eine Ausführungsform unter Verwendung einer schrägverzahnten Zahnstange und linearer Bewegung einer Doppelkurve entsprechend dem Kurvenring 29 gedacht. In das durch den Gehäusedeckel 14 verschlossen gehaltene Gehäuse 13 ist das Schneckenrad 37 drehbar eingesetzt. Das Schneckenrad 37 ist über eine Schnecke von dem Stellmotor 12 links- und rechtsdrehend antreibbar. Der Kurvenring 29 wird hierbei über einen Mitnehmer 38 mitgeführt, der als Ausgleichskupplung dient und in dessen gummielastischem Mittelteil Zylinderstifte 39 eingesetzt sind, die in je eine Nut 41 im Schneckenrad 37 und im Kurvenring 29 eingreifen. Der Kurvenring 29 weist, wie es auch aus den Fign. 3a bis 3e ersichtlich ist, eine erste Steuerkurve 31, eine zweite Steuerkurve 32 und eine Ringnut 35 mit den Stirnflächen 36 als Anlageflächen auf.In Fig. 2 only one half of a locking device is shown, since the housing 13, the housing cover 14, a worm wheel 37, a locking guide 17 and a cam ring 29 in this embodiment, like the locking rod 9, are rotationally symmetrical components. With this construction, a plurality of locking bolts 23 can be guided against the locking rod 9 at the same time. However, it is also envisaged for an embodiment using a helical rack and linear movement of a double curve corresponding to the cam ring 29. The worm wheel 37 is rotatably inserted into the housing 13, which is kept closed by the housing cover 14. The worm wheel 37 can be driven by the servo motor 12 to the left and to the right by means of a worm. The cam ring 29 is carried here via a driver 38, which serves as a compensating clutch and in the rubber-elastic middle part cylindrical pins 39 are inserted, which engage in a groove 41 in the worm wheel 37 and in the cam ring 29. The cam ring 29 has, as is also shown in FIGS. 3a to 3e, a first control curve 31, a second control curve 32 and an annular groove 35 with the end faces 36 as contact surfaces.

In dem Gehäusedeckel 14 ist eine Riegelführung 17 drehbar gelagert. Zwischen dem Gehäusedeckel14 und der Riegelführung 17 ist eine schnäpperartige Drehsicherung eingelassen mit einem Schnäpper 19, der unter dem Druck einer Feder 21, die sich in einem Verschlußstück 22 abstützt, in eine Ausnehmung 18 in der Riegelführung 17 eingreift. Die Riegelführung 17 dient zur radialen Führung einer Anzahl, z.B. von drei Sperriegeln 23.A bolt guide 17 is rotatably mounted in the housing cover 14. Between the housing cover 14 and the bolt guide 17 there is a catch-like anti-rotation lock with a catch 19 which engages in a recess 18 in the bolt guide 17 under the pressure of a spring 21, which is supported in a closure piece 22. The bolt guide 17 serves for the radial guidance of a number, for example three locking bolts 23.

Die Sperriegel 23 sind in der Riegelführung 17 in Richtung auf die Sperrstange 9 zu und von dieser weg beweglich gelagert. Riegelführung 17 und Kurvenring 29 gestatten den Sperriegeln 23 auch ein seitliches Ausweichen entsprechend der mit den beiden Doppelpfeilen 30 in Fig. 3b angedeuteten Bewegungsrichtungen, um Ungenauigkeiten bei der Zustellung der Sperrstange 9 als Folge eines mehr oder weniger großen Spiels in der Stößelführung auszugleichen.The locking bolts 23 are movably mounted in the bolt guide 17 in the direction of the locking rod 9 and away from it. Bolt guide 17 and cam ring 29 also allow the locking bolts 23 to move sideways in accordance with the directions of movement indicated by the two double arrows 30 in FIG. 3b, in order to compensate for inaccuracies in the delivery of the locking rod 9 as a result of a more or less large play in the ram guide.

In jeden Sperriegel 23 ist eine Längsbohrung 26 eingebracht in Erstreckung der Bewegung des Sperriegels 23 gegen die Sperrstange 9. In die Längsbohrung 26 ist ein Kurvenfolgerstück 28 eingesetzt, das unter dem Druck einer Feder 27 ständig gegen die erste Steuerkurve 31 gedrückt wird. In gleichem Maße erfährt der Sperriegel 23 eine Vorspannung in Richtung auf die Sperrstange 9 zu. In den Sperriegel 23 ist weiterhin ein Stift 33 eingesetzt, der mit der zweiten Steuerkurve 32 an dem Kurvenring 29 zusammenwirkt, sowie ein Zylinderstift 34, der in die Ringnut 35 greift und bei Drehung des Kurvenringes 29 zur Anlage an einer der Stirnflächen 36 gelangt zur Mitnahme des bzw. der Sperriegel 23. Mit 42, 43 sind Berührungslos-Schalter positioniert zur Abfrage der Ist-Positionen von Kurvenring 29 und Sperriegel 23. Pfeil 16 deutet auf die Bohrung in Gehäusedeckel 14 und zylindrischem Gehäuse 13 hin. Mit 11 bzw. 24 sind die Zahnungen an Sperrstange 9 bzw. an Sperriegel 23 angedeutet. Die Zahnung selbst kann ein Bewegungsgewinde, beispielsweise ein Trapez- oder Sägengewinde sein. Die Sperriegel 23 können Segmente sein, die aus einer Mutter Ausgeschnitten worden sind, die ein gleiches Gewinde wie die Sperrstange 9 aufweist.In each locking bolt 23, a longitudinal bore 26 is made in the direction of the movement of the locking bolt 23 against the locking rod 9. In the longitudinal bore 26, a curve follower piece 28 is inserted, which is constantly pressed under the pressure of a spring 27 against the first control cam 31. To the same extent, the locking bolt 23 is preloaded in the direction of the locking rod 9. In the locking bolt 23, a pin 33 is further inserted, which cooperates with the second cam 32 on the cam ring 29, and a cylinder pin 34, which engages in the annular groove 35 and comes to rest on one of the end faces 36 when the cam ring 29 rotates the or the locking bolt 23. With 42, 43 non-contact switches are positioned for querying the actual positions of the cam ring 29 and locking bolt 23. Arrow 16 indicates the bore in the housing cover 14 and the cylindrical housing 13. The toothings on locking rod 9 and locking bolt 23 are indicated by 11 and 24, respectively. The toothing itself can be a movement thread, for example a trapezoidal or saw thread. The locking bolts 23 can be segments which have been cut out of a nut which has the same thread as the locking rod 9.

In Fig. 4 ist eine Sperrstange 9 angedeutet mit einem Bewegungsgewinde 11. Es sind weiterhin drei Sperriegel 23 angedeutet, die gegen den äußeren Mantel der Sperrstange 9 gelegt sind. Diese Darstellung entspricht der Phase, in der die Sperriegel 23 in einer horizontalen Eben um die Sperrstange 9 herum zu drehen sind, um in die Nut bzw. die Gewindegänge an der Sperrstange 9 eingreifen zu können.4, a locking rod 9 is indicated with a movement thread 11. Three locking bolts 23 are also indicated, which are placed against the outer jacket of the locking rod 9. This representation corresponds to the phase in which the locking bolts 23 are to be rotated in a horizontal plane around the locking rod 9 in order to be able to engage in the groove or the threads on the locking rod 9.

Von den Sperriegeln 23 ist jeweils nur der vordere Bereich eines Zahnes von mehreren möglichen Zähnen angedeutet worden, die zueinander höhenmäßig entsprechend der Steigung der Nut der Sperrstange 9 auf einer die Steigung bzw. eine umlaufende Nut andeutenden Linie 10 angreifen. Die Drehung der Sperriegel 23 um die Sperrstange 9 herum muß solange erfolgen, bis die Zähne dieser mit den Gängen in der Sperrstange 9 übereinstimmen. Nachdem die Sperrstange 9 entsprechend der Bewegung 4 des Stößels 3 in eine beliebige Arretierlage bewegt ist und vom Pressenantrieb zunächst noch in dieser Lage gehalten wird, sind die Verriegelungsvorrichtungen zu betätigen. Die Sperriegel sind durch Drehen aus der in Fig. 5a gezeigten Lage in die in Fig. 5b gezeigte Lage zu bewegen und in dieser Lage formschlüssig zu sichern.Of the locking bars 23, only the front region of a tooth has been indicated by a plurality of possible teeth, which attack one another in terms of height in accordance with the slope of the groove of the locking rod 9 on a line 10 which indicates the slope or a circumferential groove. The rotation of the locking bolt 23 around the locking rod 9 must take place until the teeth of this with the gears in the Lock rod 9 match. After the locking rod 9 has moved into any locking position in accordance with the movement 4 of the plunger 3 and is initially held in this position by the press drive, the locking devices are to be actuated. The locking bolts can be moved from the position shown in FIG. 5a to the position shown in FIG. 5b by turning and secured in a positive manner in this position.

Der Verriegelungsvorgang zur Sicherung der hochgefahrenen Lage des Stößels 3 in den einzelnen Phasen ist in den Fign. 3a bis 3e dargestellt.The locking process for securing the raised position of the plunger 3 in the individual phases is shown in FIGS. 3a to 3e.

Fig. 3a zeigt den entriegelten Zustand. Der Sperriegel 23 wird durch Anlage des Zylinderstiftes 33 an der zweiten Steuerkurve 32 an einen durch die Feder 27 bewirkbaren Bewegung auf die Sperrstange 9 zu gehindert. Wird nun der Kurvenring 29 in Richtung des Pfeils 44 bewegt, kommt der Zylinderstift 33 von der zweiten Steuerkurve 32 frei und der Sperriegel 23 wird unter dem Druck der Feder 27 bei Anlage des Kurvenfolgerstückes 28 an der ersten Steuerkurve 31 gegen die Sperrstange 9 geführt. Hierbei kommt es zunächst im allgemeinen zu einer Anlage von Sperriegel 23 an dem der Sperrstange 9, wie er auch in Fig. 5a gezeigt ist. Der Schnäpper 19 hindert die Sperriegelführung 17 und somit die Sperriegel 23 an einer Drehbewegung um die Sperrstange 9. Die Länge der Ringnut 35 (Fig 2) ist abgestimmt auf diese Bewegung, und der Zylinderstift 34 kommt zur Anlage an der Stirnfläche 36, sodaß unter Überwinden der Schnäpperwirkung nun Riegelführung 17 und Sperriegel 23 entsprechend Pfeil 46 (in Fig. 3c) mitbewegt werden. Die Stirnfläche 36 der Ringnut 35 (Fig. 2) ist in den Fig. 3b bis 3d als Anschlagkante 36 dargestellt. Jeder Sperriegel 23 wird unter Anlage an der Sperrstange 9 infolge Druckwirkung der Feder 27 und der Drehbewegung von Schneckenrad 37, Kurvenring 29 und Riegelführung 17 soweit gedreht, bis die Zahnung der Sperriegel 23 mit den Gängen der Sperrstange 9 übereinstimmen. Bei Erreichen dieser Stellung wird jeder Sperriegel 23 vermittels des Druckes der Feder 27 weiter vor und in dem bzw. die Gänge der Sperrstange 9 verstellt, dargestellt in den Fign. 3d und 5d. Riegelführung 17 und Sperriegel 23 bleiben in dieser Drehlage, an der jeder Sperriegel 23 von der ersten Kurve 31 freigekommen ist. Durch Überwinden der Reibung zwischen dem Kurvenfolgerstück 28 und der ersten Steuerkurve 31 schiebt sich der erhöhte Kurventeil dieser hinter jeden Sperriegel 23, der durch Einnahme dieser Drehlage des Kurvenringes 29 entsprechend Fig. 3e gesichert ist.3a shows the unlocked state. The locking bolt 23 is prevented from moving by the spring 27 against the locking rod 9 by the cylindrical pin 33 on the second control cam 32. If the cam ring 29 is now moved in the direction of the arrow 44, the cylinder pin 33 is released from the second control cam 32 and the locking bolt 23 is guided against the locking rod 9 under the pressure of the spring 27 when the cam follower piece 28 bears against the first control cam 31. In this case, locking bars 23 generally initially rest against the locking bar 9, as is also shown in FIG. 5a. The catch 19 prevents the locking bar guide 17 and thus the locking bar 23 from rotating about the locking rod 9. The length of the annular groove 35 (FIG. 2) is matched to this movement, and the cylinder pin 34 comes to rest against the end face 36, so that it is overcome the catch action 17 and lock bolt 23 are now moved according to arrow 46 (in Fig. 3c). The end face 36 of the annular groove 35 (FIG. 2) is shown as a stop edge 36 in FIGS. 3b to 3d. Each locking bolt 23 is rotated under contact with the locking rod 9 as a result of the pressure action of the spring 27 and the rotary movement of the worm wheel 37, cam ring 29 and locking guide 17 until the teeth of the locking bolts 23 match the gears of the locking rod 9. When this position is reached, each locking bolt 23 is further adjusted by means of the pressure of the spring 27 before and in which or the gears of the locking rod 9, shown in FIGS. 3d and 5d. Bolt guide 17 and locking bolt 23 remain in this rotational position at which each locking bolt 23 has been released from the first curve 31. By overcoming the friction between the cam follower piece 28 and the first control cam 31, the elevated cam part pushes it behind each locking bolt 23, which is secured by taking this rotational position of the cam ring 29 according to FIG. 3e.

Das Lösen der Sicherung und die Rückführung der Sperriegel 23 in eine die Sperrstange 9 freigebende und gesicherte Lage nach Fig. 3a erfolgt durch Umkehr der Bewegung des Kurvenringes 29, Entsperren jedes Sperriegels 23 von der ersten Steuerkurve 31, Herausziehen jedes Sperriegels 23 durch Anlage des Stiftes 33 an der zweiten Steuerkurve 32, Anlage der zweiten Stirnfläche 36 jeder Ringnut 35 an dem Zylinderstift 34 jedes Sperriegels 23, Einschnäppen der Schnäpperverbindung 18, 19, 21 und Stillstand des Stellmotors 12.The release of the fuse and the return of the locking bar 23 in a locking bar 9 releasing and securing position according to Fig. 3a is done by reversing the movement of the cam ring 29, unlocking each locking bar 23 from the first cam 31, pulling out each locking bar 23 by engaging the pin 33 on the second control cam 32, contact of the second end face 36 of each annular groove 35 on the cylindrical pin 34 of each locking bolt 23, snapping in of the catch connection 18, 19, 21 and standstill of the servomotor 12.

Claims (5)

  1. Press having at least one slide (3) and a platen (7) for receiving tools, a drive system (6) for the downwardly and upwardly movable slide (3) and locking mechanisms (8) between areas fixed on the press and each slide (3) to protect each slide (3) against uncontrolled falling, each locking mechanism (8) exhibiting a locking bar (9) having a circumferential groove (10) in the form of a thread and locking bolts (23) and adjusting means (12) for the advancement and retraction of the locking bolts (23) and means (29) for securing the locking position of the locking bolts (23), and the locking bolts (23) being shaped, in the width of those areas which can be matched to the circumferential groove (10), according to the pitch and shape of the circumferential groove (10) in the locking bar (9), characterised in that the locking bars (9) of the locking mechanisms (8) are rigidly fastened to the slide (3) and in that a locking bolt (23), where necessary a plurality of locking bolts (23), can be impacted upon at the areas fixed on the press by a common adjusting means (12), can be laid, in an upwardly advanced position of the slide (3), against the periphery of a locking bar (9) and, in this position, can be rotated by the adjusting means (12) about the locking bar (9) prior to engagement into the circumferential groove (10) of the locking bar (9).
  2. Press having housings (13, 14), each penetrated by a locking bar (9), for receiving the locking bolts (23) mounted in guide means (17), characterised by the following means in each housing (13, 14):
    a curved ring (29) which is mounted essentially coaxially to the locking bar (9) and is rotatable by means of a servomotor (12),
       having a first control curve (31) for a movement of the locking bolts (23) up to the locking bar (9) and for the catch-locking of the engagement of the locking bolts (23) in the locking bar (9) and
       having a second control curve (32), matching the first control curve (31), for lifting the locking bolts (23) out from the engagement with the locking bar (9) and for securing their position withdrawn from the locking bar (9),
    an annular bolt guide (17), which is mounted rotatably and essentially coaxially to the locking bar (9), for receiving the locking bolts (23),
       there being disposed between the housing (13, 14) and the bolt guide (17) at least one spring-loaded type rotation-protection device (19, 21, 22), and locking bolts (23) which are mounted so as to be movable up to and away from the locking bar (9) and for this purpose
       exhibit a first cylindrical pin (33) for contact against the second control curve (32),
       in a blind hole (26) extending in the direction of travel (30) up to the locking bar (9), a curve-follower piece (28) and a pressure spring (27) to force the curve-follower piece (28) against the first control curve (31) and hence the locking member (23) in the direction of the locking bar (9) and
       additionally exhibit a second cylindrical pin (34), which engages into an annular groove (35) in the curved ring (29), for contact against the one or other end face (36) limiting the annular groove (35), as a function of the direction of the rotational movement of the curved ring (29).
  3. Press according to Claim 2, characterised in that the curved ring (29) is rotatable by a motor-(adjusting means-)driven worm wheel (37) and, for the transmission of movement from the worm wheel (37) to the curved ring (29), an elastomeric lug (38, 39) is used as an equalising coupling.
  4. Press according to Claim 2, characterised in that each locking bolt (23) is mounted in the bolt guide (17) so as to be freely movable in the direction of the locking bar (9), up to and away from it, and in the direction (30) at right-angles to this and at right-angles to the relative movement (4) between locking bar (9) and locking bolt (23).
  5. Press according to Claim 2, characterised in that the locking bolts (23) of each locking mechanism (8) are segments worked from a threaded nut, the threads of which correspond to the thread of the circumferential groove (10) of the locking bar (9).
EP88117287A 1987-11-03 1988-10-18 Press with locking devices for the slide Expired - Lifetime EP0314975B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3737197 1987-11-03
DE19873737197 DE3737197A1 (en) 1987-11-03 1987-11-03 PRESS WITH LOCKING DEVICES FOR THE PESTLE

Publications (2)

Publication Number Publication Date
EP0314975A1 EP0314975A1 (en) 1989-05-10
EP0314975B1 true EP0314975B1 (en) 1992-05-20

Family

ID=6339637

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88117287A Expired - Lifetime EP0314975B1 (en) 1987-11-03 1988-10-18 Press with locking devices for the slide

Country Status (3)

Country Link
EP (1) EP0314975B1 (en)
BR (1) BR8805658A (en)
DE (2) DE3737197A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19538403C2 (en) * 1995-10-14 1999-05-12 Mueller Weingarten Maschf Press with a locking device for a press ram

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5713237A (en) * 1996-10-30 1998-02-03 Clearing Niagara, Inc. Slide lock for stamping press
ITMC980062A1 (en) * 1998-06-12 1999-12-12 Renzo Cipriani PARKING BRAKE FOR MECHANICAL PRESSES
DE19910965A1 (en) * 1999-03-12 2000-09-14 Mueller Weingarten Maschf Press with a locking device for press rams
DE102008009516A1 (en) 2008-02-15 2009-08-20 Herion Systemtechnik Gmbh Clutch-brake combination
DE202010001183U1 (en) 2010-01-19 2010-05-12 Josef Reuke Stahl- Und Maschinenbau Gmbh safety device
DE102010005127B4 (en) 2010-01-19 2012-11-22 Josef Reuke Maschinenbau GmbH Securing device for presses, press and method for securing a press
CN102966832B (en) * 2012-10-26 2016-01-27 金丰(中国)机械工业有限公司 The detection device that two degree, press machine falls and detecting method

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2252329A1 (en) * 1971-10-26 1973-05-03 Masaaki Uchida PRESS WITH LARGE STROKE
DE2929676C2 (en) * 1979-07-21 1981-06-19 Hehl, Karl, 7298 Loßburg Mold clamping unit of an injection molding machine
DD226147A3 (en) * 1983-02-18 1985-08-14 Guenter Koehler DEVICE FOR LOCKING THE STOESEL TO PRESSES

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19538403C2 (en) * 1995-10-14 1999-05-12 Mueller Weingarten Maschf Press with a locking device for a press ram

Also Published As

Publication number Publication date
BR8805658A (en) 1989-07-18
EP0314975A1 (en) 1989-05-10
DE3737197A1 (en) 1989-05-18
DE3871330D1 (en) 1992-06-25

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