EP2452762B1 - Device for monitoring the pressing force of a press tool - Google Patents

Device for monitoring the pressing force of a press tool Download PDF

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Publication number
EP2452762B1
EP2452762B1 EP20110188070 EP11188070A EP2452762B1 EP 2452762 B1 EP2452762 B1 EP 2452762B1 EP 20110188070 EP20110188070 EP 20110188070 EP 11188070 A EP11188070 A EP 11188070A EP 2452762 B1 EP2452762 B1 EP 2452762B1
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EP
European Patent Office
Prior art keywords
pressure
checking device
holder
pressing tool
biasing
Prior art date
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Application number
EP20110188070
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German (de)
French (fr)
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EP2452762A1 (en
Inventor
Gunnar Dipl.-Ing. Gottschaldt
Sven Dipl.-Ing. Meyer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Novopress GmbH Pressen und Presswerkzeuge and Co KG
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Novopress GmbH Pressen und Presswerkzeuge and Co KG
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Publication of EP2452762A1 publication Critical patent/EP2452762A1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
    • B21D39/04—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of tubes with tubes; of tubes with rods
    • B21D39/048—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of tubes with tubes; of tubes with rods using presses for radially crimping tubular elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
    • B25B27/02—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same
    • B25B27/10—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same inserting fittings into hoses

Definitions

  • the invention relates to a testing device for checking the pressing force of a particular hydraulic, electric or electro-hydraulic pressing tool.
  • pressing tools for example, pipe connections are made by pressing pressfittings are pressed.
  • a hydraulic pressing tool on a hydraulic piston which is actuated for example via an electrically driven pump.
  • the hydraulic piston is connected to actuating elements which act directly or indirectly on pressing jaws.
  • the pressing force applied by the pressing tool must not fall below a minimum pressing force in order to ensure a secure pressing of the pipe fitting. It is therefore necessary to check the pressing force applied by the pressing tool at regular intervals.
  • the tester has a housing which is fixed in the press tool via a cylindrical projection.
  • a piston is arranged, the piston rod protrudes through the cylindrical projection.
  • Force is applied to the free end of the piston rod for testing the pressing force of the pressing tool via corresponding actuating elements of the pressing tool.
  • a disc spring package is disposed within the housing on the Piston acts.
  • a pin-shaped display element is connected to the piston via a tubular extension which is surrounded by the disc springs. By squeezing the disc springs is thus a displacement of the pin-shaped display element.
  • the pin-shaped display element cooperates with a latching means which engages upon reaching the required pressing force. If the pin-shaped display element is thus held by the locking means, the required pressing force is reached.
  • a locking means for fixing the pin-shaped display element is technically complicated and therefore error-prone. For example, it is no longer possible to ensure that the locking element actually engages even if there are only slight soiling, even though the required pressing force was generated by the pressing tool.
  • the object of the invention is to provide a tester for checking the pressing force of a pressing tool, which is simple and inexpensive and ensures a reliable measurement of the test load over a long period of time.
  • the object is achieved by a test device according to claim 1.
  • the testing device for checking the pressing force of a particular hydraulic, electric or electro-hydraulic pressing tool has a permanently connectable to the pressing tool to be tested holding element. Furthermore, the tester has a relative to the holding element displaceably arranged pressure element and arranged between the holding element and the pressure element counter-pressure element on. The displacement of the pressure element relative to the holding element is effected by actuating the pressing tool. In this case, actuating elements are moved, in particular displaced, in a hydraulic pressing tool via a hydraulic piston. The actuators act on the pressure element.
  • the counter-pressure element which is arranged at least partially between the holding element and the pressure element or individual components of these elements, according to the invention comprises at least one elastomeric body.
  • Elastomeric bodies have the advantage that is essential to the invention, in comparison to a disc spring packet, that settling or wear phenomena occur to a considerably lesser extent.
  • the behavior of the elastomer body is independent of the lubrication between individual elements such as disc springs. As a result, it can be ensured over a long period of time and a large number of test procedures that the counterforce generated by the elastomer body changes only slightly.
  • the counter-pressure element exclusively on one or more elastomeric body. If a plurality of elastomeric bodies are provided, these may be arranged parallel and / or in series. By replacing individual elastomer body thus the test force can be varied easily.
  • the display element may be, for example, a pressure sensor, in particular an electrical pressure sensor, which generates an acoustic or optical signal when the required test force is reached, for example. If necessary, an electrical contact is sufficient as a display element. Since the elastomeric body is compressed, at least individual components of the holding element and the pressure element move towards each other. In this case, upon reaching a sufficient path, which is proportional to the force of the counter-pressure element, an electrical contact could be closed become. As a result, in turn, an optical or acoustic signal can be triggered.
  • the display element is a mechanical display element, so that an additional power supply of the tester is not required.
  • an example, pin-shaped display element may be connected to the holding element or the pressure element, wherein a relative movement between the holding element and pressure element is visible on the display element. This is done in particular by appropriate markings on the display and / or the holding or printing element.
  • the Haiteelement on a connectable to the pressing tool fixing preferably takes place via those connecting elements which also serve to receive the pressing jaws or a press sling.
  • the holding element has a holding plate, which is preferably connected via a particular tubular connecting element with the fixing element. The fixing element, the connecting element and the retaining plate thus represent a unit.
  • the pressure element has a pressure plate, which in particular surrounds the connection element of the holding element.
  • An actuating element is connected to the pressure plate.
  • the pressure force of the pressing tool acts, wherein the pressing force of the pressing tool is transmitted in particular via the actuating elements of the pressing tool on the actuating elements of the pressure element.
  • these are preferably passed through the fixing element of the holding element or arranged in corresponding recesses.
  • the at least one elastomeric body is preferably arranged between the holding plate and the pressure plate. If only one elastomeric body or a plurality of elastomeric bodies connected in series are provided, these are preferably annularly cylindrical and surround the connecting element of the retaining element. It is also possible that a plurality of elastomer bodies arranged parallel to one another are arranged around the connecting element. A combination of this arrangement of multiple elastomeric body is possible.
  • a biasing element for biasing the at least one elastomeric body is provided.
  • biasing the biasing of the elastomer body can be done at rest. In this way, the test force can be adjusted because the at least one elastomeric body to achieve the same path of the display element must compress the at least one elastomeric body stronger. Also can be done by providing such a biasing element readjustment and thus compensation of wear.
  • the biasing element acts in a particularly preferred embodiment on the retaining plate of the holding element.
  • the biasing element moves the holding plate in the direction of the pressure plate
  • the biasing element is fixable to the connecting element of the holding element.
  • the fixation takes place in different positions, wherein it is particularly preferred that the biasing element surrounds the connecting element.
  • the biasing element is designed as a self-locking nut, which cooperates with a thread of the tubular connecting element.
  • the testing device is connected to a pressing tool for its verification.
  • the pressing tool 10 which is shown only partially in the figures, has a hydraulic cylinder 12, in which a hydraulic fluid for generating a pressing force is supplied via an electrically operated hydraulic pump, not shown. With the hydraulic piston, two roller-shaped actuating elements 14 are connected in the illustrated embodiment. About the actuators 14, the pressing force is transmitted to the pressing jaws or the press loop. Also for checking the pressing force of the pressing tool 10, a transfer of the pressing force via the actuating elements 14 takes place on the tester.
  • the testing device for checking the pressing force has a holding element and a pressure element.
  • the holding element which is firmly connected to a receptacle 16 of the pressing tool 10, has a fixing element 18, a fixedly connected to the fixing element 18 tubular connecting element 20 and a retaining plate 22.
  • the pressure element which is displaceable relative to the holding element, has a pressure plate 24, which is connected via an intermediate element 26 with an actuating element 28.
  • On the confirmation element 28 of the pressure element acts during testing of the pressing tool 10 via the actuating elements 14 of the pressing tool 10, the pressing force.
  • an arranged between the retaining plate 22 and the pressure plate 24 elastomeric body 30 is compressed or elastically deformed.
  • a plurality of, in particular parallel and / or arranged in series with each other elastomeric body may be provided.
  • a pin-shaped display element 32 is disposed within the tubular connecting element 20.
  • the pin-shaped indicator 32 is slidably held in the hollow tubular connector.
  • the displacement of the display element 32 via a connecting pin 34.
  • the connecting pin 34 is fixedly connected to the pressure plate 24 and engages over a slot 26 (FIG. Fig. 2 ) in the connecting element 20 a.
  • when checking the pressing force of the pressing tool 10 is a pushing out of the pin-shaped display element 32 from an opening 38 of the connecting element 20.
  • markers 40 are predetermined so that it can be determined in a simple manner, whether the required pressing force has been achieved ,
  • a biasing element 42 is additionally provided.
  • the biasing element 42 is formed in the illustrated embodiment as a self-locking nut which engages in a provided on the outside of the tubular connecting element 20 thread 44. Via the nut 42 and an intermediate disc 46, a biasing force can be exerted on the retaining plate 22 and thus on the elastomer body 30. Due to the provision according to the invention of a biasing element 42, it is possible, for example, to compensate for the wear of the elastomeric body.
  • a predefined biasing force may be exerted on the elastomeric body 30 so that the test force to be generated by the pressing tool 10 is higher in order to push the indicating element 32 out of the opening 38 by a predetermined distance. This is realized in particular in that the application of the biasing force is independent of the display element 32. An application of the biasing force by turning the nut 42 does not change the position of the display element 32.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)

Description

Die Erfindung betrifft ein Prüfgerät zur Überprüfung der Presskraft eines insbesondere hydraulischen, elektrischen oder elektro-hydraulischen Presswerkzeuges.The invention relates to a testing device for checking the pressing force of a particular hydraulic, electric or electro-hydraulic pressing tool.

Mit Hilfe von Presswerkzeugen werden beispielsweise Rohrverbindungen hergestellt, indem Pressfittings verpresst werden. Hierzu weist ein hydraulisches Presswerkzeug einen Hydraulikkolben auf, der beispielsweise über eine elektrisch angetriebene Pumpe betätigt wird. Der Hydraulikkolben ist mit Betätigungselementen verbunden, die mittelbar oder unmittelbar auf Pressbacken wirken. Durch Verschieben der Betätigungselemente des Presswerkzeuges erfolgt somit ein Schließen der Pressbacken und somit ein Verpressen des Rohrfittings. Die hierbei von dem Presswerkzeug aufgebrachte Presskraft darf, um ein sicheres Verpressen des Rohrfittings zu gewährleisten, eine Mindestpresskraft nicht unterschreiten. Es ist daher erforderlich, die von dem Preßwerkzeug aufbringbare Presskraft in regelmäßigen Abständen zu prüfen.With the help of pressing tools, for example, pipe connections are made by pressing pressfittings are pressed. For this purpose, a hydraulic pressing tool on a hydraulic piston, which is actuated for example via an electrically driven pump. The hydraulic piston is connected to actuating elements which act directly or indirectly on pressing jaws. By moving the actuating elements of the pressing tool thus closing the pressing jaws and thus compressing the pipe fitting. The pressing force applied by the pressing tool must not fall below a minimum pressing force in order to ensure a secure pressing of the pipe fitting. It is therefore necessary to check the pressing force applied by the pressing tool at regular intervals.

Zur Überprüfung der Presskraft ist aus EP 1 123 760 ein Prüfgerät gemäß dem Oberbegriff des Anspruchs 1 bekannt. Das Prüfgerät weist ein Gehäuse auf, das über einen zylindrischen Ansatz in dem Presswerkzeug fixiert wird. In dem Gehäuse ist ein Kolben angeordnet, dessen Kolbenstange durch den zylindrischen Ansatz ragt. Auf das freie Ende der Kolbenstange wird zum Prüfen der Presskraft von dem Presswerkzeug über entsprechende Betätigungselemente des Presswerkzeuges Kraft aufgebracht. Ferner ist innerhalb des Gehäuses ein Tellerfederpaket angeordnet auf das der Kolben einwirkt. Des Weiteren ist mit dem Kolben über einen rohrförmigen Ansatz, der von den Tellerfedern umgeben ist, ein stiftförmiges Anzeigeelement verbunden.
Durch Zusammendrücken der Tellerfedern erfolgt somit ein Verschieben des stiftförmigen Anzeigeelementes. Das stiftförmige Anzeigeelement wirkt mit einem Rastmittel zusammen, das bei Erreichen der geforderten Presskraft einrastet. Sofern das stiftförmige Anzeigeelement somit von dem Rastmittel gehalten wird, ist die erforderliche Presskraft erreicht. Bei der EP 1 123 760 ist insbesondere nachteilig, dass sich die Federcharakteristik von Tellerfedern zeitlich sehr schnell und sehr stark ändert. Dies ist durch Setzen des Federpakets sowie auch durch Veränderungen des Schmierzustandes zwischen den Tellerfedern und somit der Reibungsveränderung hervorgerufen. Dies führt zu stark abweichenden Messergebnissen. Das Vorsehen eines Rastmittels zum Fixieren des stiftförmigen Anzeigeelementes ist technisch kompliziert und daher fehleranfällig. Bereits durch geringe Verschmutzungen ist es beispielsweise nicht mehr gewährleistet, dass das Rastelement tatsächlich einrastet, obwohl die erforderliche Presskraft vom Presswerkzeug erzeugt wurde.To check the press force is off EP 1 123 760 a tester according to the preamble of claim 1 known. The tester has a housing which is fixed in the press tool via a cylindrical projection. In the housing, a piston is arranged, the piston rod protrudes through the cylindrical projection. Force is applied to the free end of the piston rod for testing the pressing force of the pressing tool via corresponding actuating elements of the pressing tool. Further, a disc spring package is disposed within the housing on the Piston acts. Furthermore, a pin-shaped display element is connected to the piston via a tubular extension which is surrounded by the disc springs.
By squeezing the disc springs is thus a displacement of the pin-shaped display element. The pin-shaped display element cooperates with a latching means which engages upon reaching the required pressing force. If the pin-shaped display element is thus held by the locking means, the required pressing force is reached. In the EP 1 123 760 is particularly disadvantageous that changes the spring characteristic of disc springs in time very fast and very strong. This is caused by setting the spring assembly as well as by changes in the state of lubrication between the disc springs and thus the friction change. This leads to strongly deviating measurement results. The provision of a locking means for fixing the pin-shaped display element is technically complicated and therefore error-prone. For example, it is no longer possible to ensure that the locking element actually engages even if there are only slight soiling, even though the required pressing force was generated by the pressing tool.

Aufgabe der Erfindung ist es, ein Prüfgerät zur Überprüfung der Presskraft eines Presswerkzeuges zu schaffen, das einfach und kostengünstig aufgebaut ist und über einen langen Zeitraum eine zuverlässige Messung der Prüfkraft gewährleistet.The object of the invention is to provide a tester for checking the pressing force of a pressing tool, which is simple and inexpensive and ensures a reliable measurement of the test load over a long period of time.

Die Lösung der Aufgabe erfolgt durch ein Prüfgerät gemäß Anspruch 1.The object is achieved by a test device according to claim 1.

Das erfindungsgemäße Prüfgerät zur Überprüfung der Presskraft eines insbesondere hydraulischen, elektrischen oder elektro-hydraulischen Presswerkzeuges weist ein fest mit dem zu prüfenden Presswerkzeug verbindbares Halteelement auf. Ferner weist das Prüfgerät ein gegenüber dem Halteelement verschiebbar angeordnetes Druckelement sowie ein zwischen dem Halteelement und dem Druckelement angeordnetes Gegendruckelement auf. Die Verschiebung des Druckelements relativ zu dem Halteelement erfolgt durch Betätigen des Presswerkzeuges. Hierbei werden bei einem hydraulischen Presswerkzeug über einen Hydraulikkolben Betätigungselemente bewegt, insbesondere verschoben. Die Betätigungselemente wirken auf das Druckelement. Das Gegendruckelement, das zumindest teilweise zwischen dem Haltelement und dem Druckelement oder einzelnen Bestandteilen dieser Elemente angeordnet ist, weist erfindungsgemäß mindestens einen Elastomerkörper auf. Elastomerkörper haben insbesondere im Vergleich zu einem Tellerfederpaket den erfindungswesentlichen Vorteil, dass Setz- oder Verschleißerscheinungen in einem erheblich geringeren Maß auftreten. Insbesondere ist das Verhalten des Elastomerkörpers unabhängig von der Schmierung zwischen einzelnen Elementen wie Tellerfedern. Hierdurch kann über einen langen Zeitraum und einer Vielzahl von Prüfvorganges gewährleistet werden, dass sich die vom Elastomerkörper erzeugte Gegenkraft nur geringfügig verändert.The testing device according to the invention for checking the pressing force of a particular hydraulic, electric or electro-hydraulic pressing tool has a permanently connectable to the pressing tool to be tested holding element. Furthermore, the tester has a relative to the holding element displaceably arranged pressure element and arranged between the holding element and the pressure element counter-pressure element on. The displacement of the pressure element relative to the holding element is effected by actuating the pressing tool. In this case, actuating elements are moved, in particular displaced, in a hydraulic pressing tool via a hydraulic piston. The actuators act on the pressure element. The counter-pressure element, which is arranged at least partially between the holding element and the pressure element or individual components of these elements, according to the invention comprises at least one elastomeric body. Elastomeric bodies have the advantage that is essential to the invention, in comparison to a disc spring packet, that settling or wear phenomena occur to a considerably lesser extent. In particular, the behavior of the elastomer body is independent of the lubrication between individual elements such as disc springs. As a result, it can be ensured over a long period of time and a large number of test procedures that the counterforce generated by the elastomer body changes only slightly.

Bei einer besonders bevorzugten Weiterbildung der Erfindung weist das Gegendruckelement ausschließlich einen oder mehrere Elastomerkörper auf. Sofern mehrere Elastomerkörper vorgesehen sind, können diese parallel und/oder in Reihe angeordnet sein. Durch Auswechseln einzelner Elastomerkörper kann somit die Prüfkraft auf einfache Weise variiert werden.In a particularly preferred embodiment of the invention, the counter-pressure element exclusively on one or more elastomeric body. If a plurality of elastomeric bodies are provided, these may be arranged parallel and / or in series. By replacing individual elastomer body thus the test force can be varied easily.

Mit dem Halteelement und/oder dem Druckelement ist vorzugsweise ein die Druckkraft anzeigendes Anzeigeelement verbunden. Bei dem Anzeigeelement kann es sich beispielsweise um einen Drucksensor, insbesondere einen elektrischen Drucksensor handeln, der beispielsweise bei Erreichen der geforderten Prüfkraft ein akustisches oder optisches Signal erzeugt. Als Anzeigeelement ist ggf. auch ein elektrischer Kontakt ausreichend. Da der Elastomerkörper zusammengepresst wird, bewegen sich zumindest einzelne Bestandteile des Halteelementes und des Druckelementes aufeinander zu. Hierbei könnte bei Erreichen eines ausreichenden Weges, der proportional zur Kraft des Gegendruckelementes ist, ein elektrischer Kontakt geschlossen werden. Hierdurch kann wiederum ein optisches oder akustisches Signal ausgelöst werden.With the holding element and / or the pressure element, a pressure element indicating the pressure force is preferably connected. The display element may be, for example, a pressure sensor, in particular an electrical pressure sensor, which generates an acoustic or optical signal when the required test force is reached, for example. If necessary, an electrical contact is sufficient as a display element. Since the elastomeric body is compressed, at least individual components of the holding element and the pressure element move towards each other. In this case, upon reaching a sufficient path, which is proportional to the force of the counter-pressure element, an electrical contact could be closed become. As a result, in turn, an optical or acoustic signal can be triggered.

Besonders bevorzugt ist es, dass es sich bei dem Anzeigeelement um ein mechanisches Anzeigeelement handelt, sodass eine zusätzliche Energieversorgung des Prüfgerätes nicht erforderlich ist. Hierzu kann ein beispielsweise stiftförmig ausgebildetes Anzeigeelement mit dem Halteelement oder dem Druckelement verbunden sein, wobei eine Relativbewegung zwischen Halteelement und Druckelement an dem Anzeigeelement sichtbar ist. Dies erfolgt insbesondere durch entsprechende Markierungen an dem Anzeige- und/oder dem Halte- bzw. Druckelement. Besonders bevorzugt ist es, das Anzeigeelement stiftförmig auszubilden und insbesondere innerhalb eines rohrförmigen Verbindungselementes des Halteelementes anzuordnen. Durch Betätigen des Prüfgerät erfolgt somit ein Verschieben des stiftförmigen Elementes innerhalb des Verbindungselementes, das bei rohrförmiger Ausgestaltung gleichzeitig als Führungselement dient. Über eine Ausnehmung oder ein Fenster in dem Verbindungselement kann die Verschiebung des stiftförmigen Halteelementes beobachtet werden. Auch ist es möglich, dass das stiftförmige Halteelement aus einer Ausnehmung bzw. Öffnung des Verbindungselementes herausgeschoben wird.It is particularly preferred that the display element is a mechanical display element, so that an additional power supply of the tester is not required. For this purpose, an example, pin-shaped display element may be connected to the holding element or the pressure element, wherein a relative movement between the holding element and pressure element is visible on the display element. This is done in particular by appropriate markings on the display and / or the holding or printing element. It is particularly preferred to form the display element pin-shaped and in particular to arrange within a tubular connecting element of the holding element. By actuation of the tester thus takes place a displacement of the pin-shaped element within the connecting element, which also serves as a guide element in a tubular configuration. Via a recess or a window in the connecting element, the displacement of the pin-shaped holding element can be observed. It is also possible that the pin-shaped holding element is pushed out of a recess or opening of the connecting element.

In besonders bevorzugter Ausführungsform weist das Haiteelement ein mit dem Presswerkzeug verbindbares Fixierelement auf. Die Verbindung des Halteelementes mit dem Presswerkzeug erfolgt hierbei vorzugsweise über diejenigen Verbindungselemente, die auch zur Aufnahme der Pressbacken oder einer Pressschlinge dienen. Ferner weist das Halteelement einen Halteteller auf, der vorzugsweise über ein insbesondere rohrförmiges Verbindungselement mit dem Fixierelement verbunden ist. Das Fixierelement, das Verbindungselement und der Halteteller stellen somit eine Einheit dar.In a particularly preferred embodiment, the Haiteelement on a connectable to the pressing tool fixing. The connection of the holding element with the pressing tool in this case preferably takes place via those connecting elements which also serve to receive the pressing jaws or a press sling. Furthermore, the holding element has a holding plate, which is preferably connected via a particular tubular connecting element with the fixing element. The fixing element, the connecting element and the retaining plate thus represent a unit.

Das Druckelement weist in bevorzugter Ausführungsform einen Druckteller auf, der insbesondere das Verbindungselement des Halteelementes umgibt.In a preferred embodiment, the pressure element has a pressure plate, which in particular surrounds the connection element of the holding element.

Mit dem Druckteller ist ein Betätigungselement verbunden. Auf das Betätigungselement wirkt die Druckkraft des Presswerkzeuges, wobei die Druckkraft des Presswerkzeuges insbesondere über die Betätigungselemente des Presswerkzeuges auf die Betätigungselemente des Druckelementes übertragen wird. Um eine gute Führung der Betätigungselemente des Druckelementes zu gewährleisten, sind diese vorzugsweise durch das Fixierelement des Halteelementes hindurchgeführt oder in entsprechenden Ausnehmungen angeordnet.An actuating element is connected to the pressure plate. On the actuating element, the pressure force of the pressing tool acts, wherein the pressing force of the pressing tool is transmitted in particular via the actuating elements of the pressing tool on the actuating elements of the pressure element. In order to ensure a good guidance of the actuating elements of the pressure element, these are preferably passed through the fixing element of the holding element or arranged in corresponding recesses.

Der mindestens eine Elastomerkörper ist vorzugsweise zwischen dem Halteteller und dem Druckteller angeordnet. Sofern nur ein Elastomerkörper oder mehrere in Reihe geschaltete Elastomerkörper vorgesehen sind, sind diese vorzugsweise ringzylindrisch ausgebildet und umgeben das Verbindungselement des Halteelementes. Ebenso ist es möglich, dass mehrere parallel zueinander angeordnete Elastomerkörper um das Verbindungselement herum angeordnet sind. Auch eine Kombination dieser Anordnung mehrerer Elastomerkörper ist möglich.The at least one elastomeric body is preferably arranged between the holding plate and the pressure plate. If only one elastomeric body or a plurality of elastomeric bodies connected in series are provided, these are preferably annularly cylindrical and surround the connecting element of the retaining element. It is also possible that a plurality of elastomer bodies arranged parallel to one another are arranged around the connecting element. A combination of this arrangement of multiple elastomeric body is possible.

Bei einer besonders bevorzugten Weiterbildung der Erfindung ist ein Vorspannelement zum Vorspannen des mindestens einen Elastomerkörpers vorgesehen. Durch das Vorspannelement kann ein Vorspannen des Elastomerkörpers im Ruhezustand erfolgen. Hierdurch kann die Prüfkraft eingestellt werden, da der mindestens eine Elastomerkörper zum Erreichen desselben Weges des Anzeigeelementes den mindestens einen Elastomerkörper stärker zusammenpressen muss. Auch kann durch das Vorsehen eines derartigen Vorspannelementes ein Nachstellen und somit ein Ausgleich von Verschleiß erfolgen.In a particularly preferred embodiment of the invention, a biasing element for biasing the at least one elastomeric body is provided. By biasing the biasing of the elastomer body can be done at rest. In this way, the test force can be adjusted because the at least one elastomeric body to achieve the same path of the display element must compress the at least one elastomeric body stronger. Also can be done by providing such a biasing element readjustment and thus compensation of wear.

Das Vorspannelement wirkt in besonders bevorzugter Ausführungsform auf den Halteteller des Halteelementes ein. Insbesondere erfolgt durch das Vorspannelement ein Bewegen des Haltetellers in Richtung des Drucktellers,The biasing element acts in a particularly preferred embodiment on the retaining plate of the holding element. In particular, the biasing element moves the holding plate in the direction of the pressure plate,

Dies kann durch Ziehen des Halteteller in Richtung des Drucktellers oder auch durch Drücken des Haltetellers in Richtung des Drucktellers erfolgen. Besonders bevorzugt ist es, dass das Vorspannelement an dem Verbindungselement des Halteelementes fixierbar ist. Insbesondere erfolgt die Fixierung in unterschiedlichen Stellungen, wobei es besonders bevorzugt ist, dass das Vorspannelement das Verbindungselement umgibt. Besonders bevorzugt ist das Vorspannelement als selbstsichernde Mutter ausgebildet, die mit einem Gewinde des rohrförmigen Verbindungselementes zusammenwirkt.This can be done by pulling the retaining plate in the direction of the pressure plate or by pressing the retaining plate in the direction of the pressure plate. It is particularly preferred that the biasing element is fixable to the connecting element of the holding element. In particular, the fixation takes place in different positions, wherein it is particularly preferred that the biasing element surrounds the connecting element. Particularly preferably, the biasing element is designed as a self-locking nut, which cooperates with a thread of the tubular connecting element.

Nachfolgend wird die Erfindung anhand einer bevorzugten Ausführungsform unter Bezugnahme auf die anliegenden Zeichnungen näher erläutert.The invention will be explained in more detail with reference to a preferred embodiment with reference to the accompanying drawings.

Es zeigen:

Fig. 1
eine schematische Schnittansicht des Prüfgerätes im Ruhezustand und
Fig. 2
eine schematische Schnittansicht des Prüfgerätes im Prüfzustand.
Show it:
Fig. 1
a schematic sectional view of the tester in the idle state and
Fig. 2
a schematic sectional view of the tester in the test state.

Das erfindungsgemäße Prüfgerät wird mit einem Presswerkzeug zu dessen Überprüfung verbunden. Das Presswerkzeug 10, das in den Figuren nur teilweise dargestellt ist, weist einen Hydraulikzylinder 12 auf, in den über eine nicht dargestellte elektrisch betriebene Hydraulikpumpe ein Hydraulikfluid zum Erzeugen einer Presskraft zugeführt wird. Mit dem Hydraulikkolben sind im dargestellten Ausführungsbeispiel zwei rollenförmige Betätigungselemente 14 verbunden. Über die Betätigungselemente 14 wird die Presskraft auf die Pressbacken oder die Pressschlinge übertragen. Auch zum Prüfen der Presskraft des Presswerkzeuges 10 erfolgt ein Übertragen der Presskraft über die Betätigungselemente 14 auf das Prüfgerät.The testing device according to the invention is connected to a pressing tool for its verification. The pressing tool 10, which is shown only partially in the figures, has a hydraulic cylinder 12, in which a hydraulic fluid for generating a pressing force is supplied via an electrically operated hydraulic pump, not shown. With the hydraulic piston, two roller-shaped actuating elements 14 are connected in the illustrated embodiment. About the actuators 14, the pressing force is transmitted to the pressing jaws or the press loop. Also for checking the pressing force of the pressing tool 10, a transfer of the pressing force via the actuating elements 14 takes place on the tester.

Das Prüfgerät zur Überprüfung der Presskraft: des Presswerkzeuges 10 weist ein Halteelement sowie ein Druckelement auf. Das Halteelement, das mit einer Aufnahme 16 des Presswerkzeuges 10 fest verbindbar ist, weist ein Fixierelement 18, ein fest mit dem Fixierelement 18 verbundenes rohrförmiges Verbindungselement 20 sowie einen Halteteller 22 auf. Das Druckelement, das gegenüber dem Halteelement verschiebbar ist, weist einen Druckteller 24 auf, der über ein Zwischenelement 26 mit einem Betätigungselement 28 verbunden ist. Auf das Bestätigungselement 28 des Druckelementes wirkt beim Prüfen des Presswerkzeuges 10 über die Betätigungselemente 14 des Presswerkzeuges 10 die Presskraft. Beim Aufbringen der Presskraft durch das Presswerkzeug 10 erfolgt somit ein Verschieben der Betätigungselemente 28 in Fig. 1 nach links in die in Fig. 2 dargestellte Stellung. Hierbei wird ein zwischen dem Halteteller 22 und dem Drucktellers 24 angeordneter Elastomerkörper 30 zusammengedrückt bzw. elastisch verformt. Anstelle des dargestellten einen Elastomerkörpers 30 können mehrere, insbesondere parallel und/oder in Reihe zueinander angeordnete Elastomerkörper vorgesehen sein.The testing device for checking the pressing force: the pressing tool 10 has a holding element and a pressure element. The holding element, which is firmly connected to a receptacle 16 of the pressing tool 10, has a fixing element 18, a fixedly connected to the fixing element 18 tubular connecting element 20 and a retaining plate 22. The pressure element, which is displaceable relative to the holding element, has a pressure plate 24, which is connected via an intermediate element 26 with an actuating element 28. On the confirmation element 28 of the pressure element acts during testing of the pressing tool 10 via the actuating elements 14 of the pressing tool 10, the pressing force. When applying the pressing force by the pressing tool 10 is thus a displacement of the actuators 28 in Fig. 1 to the left in the Fig. 2 shown position. Here, an arranged between the retaining plate 22 and the pressure plate 24 elastomeric body 30 is compressed or elastically deformed. Instead of the illustrated one elastomer body 30, a plurality of, in particular parallel and / or arranged in series with each other elastomeric body may be provided.

Im dargestellten Ausführungsbeispiel ist innerhalb des rohrförmigen Verbindungselementes 20 ein stiftförmige Anzeigeelement 32 angeordnet. Das stiftförmige Anzeigeelement 32 ist in dem hohlen rohrförmigen Verbindungselement verschiebbar gehalten. Die Verschiebung des Anzeigeelementes 32 erfolgt über einen Verbindungsstift 34. Der Verbindungsstift 34 ist mit dem Druckteller 24 fest verbunden und greift über ein Langloch 26 (Fig. 2) in das Verbindungselement 20 ein. Im dargestellten Ausführungsbeispiel erfolgt beim Überprüfen der Presskraft des Presswerkzeuges 10 ein Herausschieben des stiftförmigen Anzeigeelementes 32 aus einer Öffnung 38 des Verbindungselementes 20. An einer Außenseite des Anzeigeelementes 32 sind Markierungen 40 vorgegeben, sodass auf einfache Weise festgestellt werden kann, ob die geforderte Presskraft erzielt wurde.In the illustrated embodiment, a pin-shaped display element 32 is disposed within the tubular connecting element 20. The pin-shaped indicator 32 is slidably held in the hollow tubular connector. The displacement of the display element 32 via a connecting pin 34. The connecting pin 34 is fixedly connected to the pressure plate 24 and engages over a slot 26 (FIG. Fig. 2 ) in the connecting element 20 a. In the illustrated embodiment, when checking the pressing force of the pressing tool 10 is a pushing out of the pin-shaped display element 32 from an opening 38 of the connecting element 20. On an outside of the display element 32 markers 40 are predetermined so that it can be determined in a simple manner, whether the required pressing force has been achieved ,

Bei der dargestellten besonders bevorzugten Ausführungsform der Erfindung ist zusätzlich ein Vorspannelement 42 vorgesehen. Das Vorspannelement 42 ist im dargestellten Ausführungsbeispiel als selbstsichernde Mutter ausgebildet, die in ein an der Außenseite des rohrförmigen Verbindungselementes 20 vorgesehenes Gewinde 44 eingreift. Über die Mutter 42 und eine Zwischenscheibe 46 kann eine Vorspannkraft auf den Halteteller 22 und somit auf den Elastomerkörper 30 ausgeübt werden. Aufgrund des erfindungsgemäßen Vorsehens eines Vorspannelementes 42 ist es möglich, beispielsweise den Verschleiß des Elastomerkörpers auszugleichen. Eine vordefinierte Vorspannkraft kann auf den Elastomerkörper 30 ausgeübt werden, sodass die von dem Presswerkzeug 10 zu erzeugende Prüfkraft höher ist, um das Anzeigeelement 32 um ein vorgegebenes Stück aus der Öffnung 38 herauszuschieben. Dies ist insbesondere dadurch realisiert, dass das Aufbringen der Vorspannkraft unabhängig von dem Anzeigeelement 32 ist. Ein Aufbringen der Vorspannkraft durch Drehen der Mutter 42 verändert die Lage des Anzeigeelementes 32 nicht.In the illustrated particularly preferred embodiment of the invention, a biasing element 42 is additionally provided. The biasing element 42 is formed in the illustrated embodiment as a self-locking nut which engages in a provided on the outside of the tubular connecting element 20 thread 44. Via the nut 42 and an intermediate disc 46, a biasing force can be exerted on the retaining plate 22 and thus on the elastomer body 30. Due to the provision according to the invention of a biasing element 42, it is possible, for example, to compensate for the wear of the elastomeric body. A predefined biasing force may be exerted on the elastomeric body 30 so that the test force to be generated by the pressing tool 10 is higher in order to push the indicating element 32 out of the opening 38 by a predetermined distance. This is realized in particular in that the application of the biasing force is independent of the display element 32. An application of the biasing force by turning the nut 42 does not change the position of the display element 32.

Claims (13)

  1. Checking device for checking the press force of a pressing tool, in particular a hydraulic pressing tool (10), comprising:
    a holder element (18, 20, 22) adapted to be fixedly connected with the pressing tool (10) to be checked,
    a pressure element (24, 26, 28) arranged so as to be displaceable with respect to the holder element (18, 20, 22), and
    a counter-pressure element (30) arranged between the holder element (18, 20, 22) and the pressure element (24, 26, 28),
    characterized in that
    the counter-pressure element (30) comprises at least one elastomeric body.
  2. Checking device of claim 1, characterized in that the counter-pressure element (30) exclusively includes one or a plurality of elastomeric bodies.
  3. Checking device of claim 1 or 2, characterized in that the counter-pressure element (30) comprises a plurality of elastomeric bodies arranged in parallel and in a row.
  4. Checking device of one of claims 1 to 3, characterized in that the at least one elastomeric body (30) is adapted to be exchanged for the purpose of adjusting the counter-pressure.
  5. Checking device of one of claims 1 to 4, characterized in that the holder element (18, 20, 22) and/or the pressure element (24, 26, 28) is connected with an indicator element (32) indicating the pressure force.
  6. Checking device of claim 5, characterized in that the indicator element (32) is pin-shaped and is preferably arranged within a tubular connecting element (20) of the holder element (18, 20, 22) and is pushed out from the connecting element (20) to indicate the pressure.
  7. Checking device of one of claims 1 to 6, characterized in that the holder element (18, 20, 22) comprises a fixing element (18) adapted to be connected with the pressing tool, and a holder plate (22) connected with the fixing element (18) via a tubular connecting element (20), in particular a tubular connecting element.
  8. Checking device of one of claims 1 to 7, characterized in that the pressure element (24, 26, 28) comprises a pressure plate (24) preferably surrounding the connecting element (20) of the holder element (18, 20, 22), and an actuator element (28) connected with the pressure plate (24), which actuator element is acted upon by the pressing tool.
  9. Checking device of claim 7 or 8, characterized in that the at least one elastomeric body (30) is arranged between the holder plate (22) and the pressure plate (24).
  10. Checking device of one of claims 1 to 9, characterized in that the holder element comprises a biasing element (42) for biasing the at least one elastomeric body (30).
  11. Checking device of claim 10, characterized in that the biasing element (42) acts on the holder plate (22).
  12. Checking device of claim 10 or 11, characterized in that the biasing element (42) is adapted to be fixed at the connecting element (20) in different positions.
  13. Checking device of claim 12, characterized in that the biasing element (42) surrounds the connecting element (20) and is preferably designed as a nut, in particular a self-locking nut.
EP20110188070 2010-11-11 2011-11-07 Device for monitoring the pressing force of a press tool Active EP2452762B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE202010015365U DE202010015365U1 (en) 2010-11-11 2010-11-11 tester

Publications (2)

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EP2452762A1 EP2452762A1 (en) 2012-05-16
EP2452762B1 true EP2452762B1 (en) 2013-01-09

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EP (1) EP2452762B1 (en)
DE (1) DE202010015365U1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107538776A (en) * 2017-08-30 2018-01-05 合肥工业大学 A kind of electro-hydraulic mixed motor press and its control method
US11186057B2 (en) 2017-08-30 2021-11-30 Hefei University Of Technology Press machine and press machine execution system

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DE3842037A1 (en) * 1988-12-14 1990-06-28 Wabco Westinghouse Fahrzeug DEVICE FOR DETECTING THE AXIAL FORCE OF A TOW BAR COUPLING
SE467986B (en) * 1991-02-18 1992-10-12 Wabco Holdings Sab LOAD CELL FOR DELIVERING A SIGNAL RELATED TO THE EXERCISED EXERCISE FOR A USE OF A LOAD CELL IN A BRAKE ARRANGEMENT
US5569866A (en) * 1994-11-02 1996-10-29 Allison; Malcolm M. Force measuring device
DE59813281D1 (en) * 1997-09-11 2006-01-19 Komax Holding Ag Dierikon Method and device for determining the quality of a crimp connection
EP1070946A3 (en) * 1999-07-20 2003-01-29 Geberit Technik Ag Device for testing the pressing force of a hydraulic press tool
ATE238137T1 (en) * 1999-11-24 2003-05-15 Arx Ag PRESSING TOOL DEVICE AND METHOD FOR CONTROLLING IT
EP1123760A1 (en) 2000-02-08 2001-08-16 Geberit Technik Ag Device for monitoring the press force of a hydraulic press tool
WO2008138987A2 (en) * 2007-05-16 2008-11-20 Gustav Klauke Gmbh Method for the operation of a motor-driven hand-held pressing apparatus, and hand-held pressing apparatus
DE202009003197U1 (en) * 2009-03-10 2010-05-06 Novopress Gmbh Pressen Und Presswerkzeuge & Co. Kommanditgesellschaft Handleable drive device for a pressing device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107538776A (en) * 2017-08-30 2018-01-05 合肥工业大学 A kind of electro-hydraulic mixed motor press and its control method
CN107538776B (en) * 2017-08-30 2019-04-23 合肥工业大学 The electro-hydraulic mixed motor press of one kind and its control method
US11186057B2 (en) 2017-08-30 2021-11-30 Hefei University Of Technology Press machine and press machine execution system
US11518131B2 (en) 2017-08-30 2022-12-06 Hefei University Of Technology Press machine execution system

Also Published As

Publication number Publication date
EP2452762A1 (en) 2012-05-16
DE202010015365U1 (en) 2012-02-15

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