EP2244335B1 - Electrical connection to a sensor in a tool or a machine - Google Patents

Electrical connection to a sensor in a tool or a machine Download PDF

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Publication number
EP2244335B1
EP2244335B1 EP10160107.8A EP10160107A EP2244335B1 EP 2244335 B1 EP2244335 B1 EP 2244335B1 EP 10160107 A EP10160107 A EP 10160107A EP 2244335 B1 EP2244335 B1 EP 2244335B1
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EP
European Patent Office
Prior art keywords
tool
holder according
housing
housing part
contacts
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.)
Not-in-force
Application number
EP10160107.8A
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German (de)
French (fr)
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EP2244335A1 (en
Inventor
Gert Graefe
Steve Piperek
Dario Vukelic
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BRANKAMP GmbH
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Brankamp GmbH
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Publication date
Priority claimed from DE200920006093 external-priority patent/DE202009006093U1/en
Priority claimed from DE200920016333 external-priority patent/DE202009016333U1/en
Application filed by Brankamp GmbH filed Critical Brankamp GmbH
Publication of EP2244335A1 publication Critical patent/EP2244335A1/en
Application granted granted Critical
Publication of EP2244335B1 publication Critical patent/EP2244335B1/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/02—Contact members
    • H01R13/22—Contacts for co-operating by abutting
    • H01R13/24—Contacts for co-operating by abutting resilient; resiliently-mounted
    • H01R13/2407—Contacts for co-operating by abutting resilient; resiliently-mounted characterized by the resilient means
    • H01R13/2414—Contacts for co-operating by abutting resilient; resiliently-mounted characterized by the resilient means conductive elastomers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/62—Means for facilitating engagement or disengagement of coupling parts or for holding them in engagement
    • H01R13/621—Bolt, set screw or screw clamp
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/62—Means for facilitating engagement or disengagement of coupling parts or for holding them in engagement
    • H01R13/629—Additional means for facilitating engagement or disengagement of coupling parts, e.g. aligning or guiding means, levers, gas pressure electrical locking indicators, manufacturing tolerances

Definitions

  • the invention relates to a holder for the detachable electrical connection of two lines, wherein the holder with a tool or a machine tool, in particular with a punching tool or a punching machine, can be connected, which has a sensor whose electrical signals to an outside of the machine tool or the tool Monitoring device can be transferred, comprising a housing consisting of a first and a second housing part, which are detachably connected to each other via a screw or plug connection, in which the lines are respectively firmly connected to electrical contacts, wherein the first housing part on the tool or on the Machine tool is detachably fixable and the second housing part is connected to the first housing part such that the contacts are electrically connected via an electrically conductive under a compressive stress clamped body, wherein the first housing part a stop sow He has a perpendicular thereto arranged base plate, on which a pin-shaped projection is formed, and wherein the second housing part has a base plate with a recess corresponding to the peg-shaped recess,
  • the tool monitoring has now experienced immense importance, since it is possible to indirectly determine the tool wear or tool break as quickly as possible, which both the manufacturing quality can be increased as well as irreparable destruction of the tool pieces or faulty batches are avoidable.
  • the vibrations of a machine tool can provide information about the manufacturing process of the machine tool.
  • Sensors in particular piezoelectric sensors, are used to measure the accelerations or vibrations.
  • the sensor signals are routed via electrical lines (cables) to a tool monitoring unit where the received electrical signals are processed and if necessary, be prepared to provide information for the machine user accordingly. Possibly. can also be an automatic shutdown of the machine when a predetermined target threshold is exceeded.
  • a particular problem is the attachment of leads for the electrical signals of the sensors on machine tools, since the extremely loaded components and assemblies on machines such as punching machines in particular large force changes, accelerations and vibrations to which the sensors and the connecting cables are exposed.
  • the attachment or integration of the sensors including the supply line is already taken into account in the machine production, so that necessarily the electrical signals of the sensors according to the prior art via electrical plug contacts are forwarded.
  • These electrical plug contacts form the interface between the moving and extremely loaded assemblies of the machine tools to respective terminals.
  • Conventional plug contacts are due to the high loads by design only for a limited period preserved. By loosening or moving the plug contacts can lead to failure or falsification of the signal transmission, which makes the machine tool monitoring inadequate and can lead to disruptions of the respective machining processes and the total failure of important functions in the worst case.
  • connecting devices for the electrical connection of contact elements are known.
  • DE 94 12 068 described one in which an elastic guide element made of metal-containing, elastomeric, conductive material is arranged in an electrically non-conductive sealing element.
  • Such elastomeric and electrically conductive contact elements are also made US 3,701,965 . US 6,752,639 and US 1,290,963 known.
  • a holding device for connecting electrical lines is also made US 2009/0023320 A1 known. These brackets are individual modules that can be put together in any number of dovetail connections to a BUS system.
  • the electrically conductive body consists of an elastomer with integrated electrically conductive particles.
  • the elastomer may be a synthetically made rubber, preferably using a silicone rubber.
  • the electrically conductive particles may consist of graphite, for example. Alternatively, however, other conductive particles can be used.
  • the electrically conductive elastic body has the ability to absorb occurring vibrations or relative movements of the contacts without interrupting the electrical connection.
  • elastic bodies are not vulnerable to breakage, such as rigid plug-in, screw or adhesive connections, which increases the longevity of the respective components. In this way, in addition, a relatively inexpensive and robust outer housing connection is created, in which the contacts are mounted under compressive stress such that electrical transmission of the sensor signals is ensured at all times.
  • the contacts and the electrically conductive body are embedded in an electrically insulating material in the housing, so that an accurate positioning and isolation over other electrically conductive parts is ensured.
  • the insulating bodies may consist of insulating elastomers or other insulating materials.
  • the contact surfaces, the elastic transmission elements and the insulating elements can be accommodated in housings of different shape and size.
  • the electrical contact is in this case generated by the generation of mechanical pressure of the elastic body as transmission elements against the contact surfaces.
  • the applied compressive stress which is exposed to the electrically conductive body as a bias, must be greater than the vibration pressure generated by the different pressure and relief to ensure a largely undisturbed operation.
  • the electrical leads are soldered to disc-shaped contacts, wherein the solder pads are transverse to the main vibration direction of the tool or the machine tool.
  • the pads are arranged perpendicular to the main vibration direction.
  • the compressive stress for the elastic conductive body is preferably generated parallel to the direction of vibration of the machine tools to be monitored by the sensor (as a bias voltage), which likewise favors the undisturbed operation of the tool or of the machine tool.
  • the contacts and the attached parts of the lines are embedded in an insulating casting compound, which is poured or glued in each case in a pocket of the housing. This ensures that the relevant electrical sensor connections are mechanically protected.
  • the screw or plug connection between the two housing parts is parallel to the main vibration direction of the tool or the machine tool, so that the contact closure between one of the contacts and the electrically conductive body is interrupted in a loosening or loosening of the screw connection and preferably the machine tool is switched off.
  • the two housing parts engage in substantially form-fitting manner and / or the electrically conductive body is in a cavity adapted to its geometric shape and is pressurized by the two housing parts with pressure.
  • the first housing part according to the invention has a stop and a base plate arranged perpendicular thereto, on which a pin-shaped elevation is formed.
  • the second housing part has a base plate, on the front side of a stop is formed, wherein in the base plate a corresponding to the peg-shaped elevation recess is formed. All parts are designed so that the attacks of the housing parts as well as the recess and survey in the mounted state of the housing substantially positively engage with each other.
  • the first housing part is preferably on the tool or the machine tool with a round or cotter pin connection and an additional screw connection fixed.
  • Such a connection is advantageously relatively robust and comparatively inexpensive to produce.
  • a cylindrical shape or an alternative design is suitable for the conductive body, in which a group of cylindrical bodies are mounted in guides in an insulating body.
  • the housing is then preferably a sleeve.
  • Fig. 1 illustrated embodiment consists of a housing, which in turn is formed of two housing parts 3, 3 ', and to the respective lines 6, 6' lead, which are connected on one side with the sensor and on the other side with a signal processing unit. These lines have end contacts 2, 2 'or contact surfaces, which are electrically connected to each other via an electrically conductive elastic body 1.
  • Suitable elastic conductive body 1 are all elastomers which are provided with conductive particles. In each case at the edge of the housing parts 3, 3 ', different insulation bodies 4, 4' and 5, 5 'are provided.
  • Fig. 2 shows an exploded view of a basic ring or cylindrical structure in a sleeve-shaped housing, which in turn is formed from the housing parts 3, 3 '.
  • the housing parts 3, 3 ' which are each shown at the edge, are connected to one another by means of a plug-in or threaded connection or possibly also by gluing.
  • a plug-in or threaded connection or possibly also by gluing.
  • Fig. 3 shows a concrete embodiment of a disc-shaped insulating body 5, in which each provided in eight holes as guides elastic conductive body 1 are used. These eight elastic conductive body 1 are, as described above, under a compressive stress and contact on both sides respective contacts 2 (see. Fig. 2 ).
  • the Fig. 4 ad show a first embodiment of the holder in different views.
  • a sensor 8 on a machine tool 7, in particular a punching machine indicated in a schematic manner. Via lines 9, the contacts 10 are connected to the sensor 8, which is integrated protected even in the machine housing.
  • the contacts 10 are embedded in a potting compound 11, which in turn is arranged in a pocket of the first housing part 12.
  • the first housing part 12 is fixedly connected to the second housing part 13 and receives contacts 15 in a potting compound 16. These contacts 15 are connected via lines 14 to the evaluation device.
  • Reference numeral 17 denotes an annular insulating body.
  • the elastically conductive body 18 is inserted under pressure bias between the contacts 10 and 15, wherein the pressure bias is constructed parallel to the direction 19 to which the sensor 8 is exposed.
  • Fig. 4b shows a holder in the unassembled state.
  • the first housing part 12 has a stop 20 and a perpendicular thereto arranged base plate 21 on which a (in Fig. 4b not shown) is formed peg-shaped survey.
  • a round pin 22 is provided, which forms a releasable connection together with a corresponding recess in the tool.
  • the second housing part 13 also has a stop 24 and a base plate 25, wherein both surfaces are formed corresponding to the first housing part 12, so that a slight and accurate telescoping or -becken the housing parts 12, 13 is made possible.
  • Fig. 4c and d is such a holder in exploded view to recognize.
  • the pin-shaped projection 26 is shown on the base plate 21, which is formed corresponding to the recess 27 within the base plate 25 of the housing part 13.

Description

Die Erfindung betrifft eine Halterung zur lösbaren elektrischen Verbindung zweier Leitungen, wobei die Halterung mit einem Werkzeug oder einer Werkzeugmaschine, insbesondere mit einem Stanzwerkzeug oder einer Stanzmaschine, verbindbar ist, die einen Sensor besitzt, dessen elektrische Signale an eine außerhalb der Werkzeugmaschine oder des Werkzeugs angeordnete Überwachungseinrichtung übertragbar sind, mit einem Gehäuse bestehend aus einem ersten und einem zweiten Gehäuseteil, die über eine Schraub- oder Steckverbindung lösbar miteinander verbunden sind, in denen jeweils die Leitungen fest mit elektrischen Kontakten verbunden sind, wobei das erste Gehäuseteil an dem Werkzeug oder an der Werkzeugmaschine lösbar fixierbar ist und das zweite Gehäuseteil derart mit dem ersten Gehäuseteil verbindbar ist, dass die Kontakte über einen elektrischen leitfähigen unter einer Druckspannung eingespannten Körper elektrisch verbunden sind, wobei das erste Gehäuseteil einen Anschlag sowie eine hierzu senkrecht angeordnete Basisplatte besitzt, auf der eine zapfenförmige Erhebung ausgebildet ist, und wobei das zweite Gehäuseteil eine Basisplatte mit einer zu der zapfenförmigen Erhebung korrespondierenden Ausnehmung aufweist, an deren Stirnseite ein Anschlag angeordnet ist.The invention relates to a holder for the detachable electrical connection of two lines, wherein the holder with a tool or a machine tool, in particular with a punching tool or a punching machine, can be connected, which has a sensor whose electrical signals to an outside of the machine tool or the tool Monitoring device can be transferred, comprising a housing consisting of a first and a second housing part, which are detachably connected to each other via a screw or plug connection, in which the lines are respectively firmly connected to electrical contacts, wherein the first housing part on the tool or on the Machine tool is detachably fixable and the second housing part is connected to the first housing part such that the contacts are electrically connected via an electrically conductive under a compressive stress clamped body, wherein the first housing part a stop sow He has a perpendicular thereto arranged base plate, on which a pin-shaped projection is formed, and wherein the second housing part has a base plate with a recess corresponding to the peg-shaped recess, at the end face of a stop is arranged.

Die Werkzeugüberwachung hat inzwischen eine immense Bedeutung erfahren, da es hiermit möglich ist, indirekt den Werkzeugverschleiß oder Werkzeugbruch schnellstmöglich festzustellen, womit sowohl die Fertigungsqualität erhöht werden kann als auch eine irreparable Zerstörung der Werkzeugstücke bzw. Fehlchargen vermeidbar sind. Insbesondere die Schwingungen einer Werkzeugmaschine können Auskunft über den Fertigungsprozess der Werkzeugmaschine liefern. Zur Messung der Beschleunigungen oder Vibrationen werden Sensoren, insbesondere Piezo-Sensoren verwendet.The tool monitoring has now experienced immense importance, since it is possible to indirectly determine the tool wear or tool break as quickly as possible, which both the manufacturing quality can be increased as well as irreparable destruction of the tool pieces or faulty batches are avoidable. In particular, the vibrations of a machine tool can provide information about the manufacturing process of the machine tool. Sensors, in particular piezoelectric sensors, are used to measure the accelerations or vibrations.

Die Sensorsignale werden über elektrische Leitungen (Kabel) an eine Werkzeug-überwachungseinheit geleitet, wo die erhaltenen elektrischen Signale verarbeitet und ggf. aufbereitet werden, um entsprechend Informationen für den Maschinenutzer zu liefern. Ggf. kann bei Überschreiten einer vorgebbaren Soll-Schwelle auch ein automatisches Abschalten der Maschine erfolgen.The sensor signals are routed via electrical lines (cables) to a tool monitoring unit where the received electrical signals are processed and if necessary, be prepared to provide information for the machine user accordingly. Possibly. can also be an automatic shutdown of the machine when a predetermined target threshold is exceeded.

Ein besonderes Problem stellt die Befestigung von Zuleitungen für die elektrischen Signale der Sensoren an Werkzeugmaschinen dar, da die extrem belasteten Bauteile und Baugruppen an Maschinen wie insbesondere Stanzmaschinen große Kraftänderungen, Beschleunigungen und Vibrationen liefern, denen die Sensoren sowie die Anschlussleitungen ausgesetzt werden. Die Befestigung bzw. Integration der Sensoren einschließlich der Zuleitung wird bei der Maschinenfertigung bereits berücksichtigt, so dass notwendigerweise die elektrischen Signale der Sensoren nach dem Stand der Technik über elektrische Steckkontakte weitergeleitet werden. Diese elektrischen Steckkontakte bilden die Schnittstelle zwischen den bewegten und extrem belasteten Baugruppen der Werkzeugmaschinen zu jeweiligen Anschlüssen. Herkömmliche Steckkontakte sind aufgrund der hohen Belastungen konstruktionsbedingt nur einen begrenzten Zeitraum haltbar. Durch Lösen oder Verschieben der Steckkontakte kann es zum Ausfall oder zur Verfälschung der Signalübertragung kommen, was die Werkzeugmaschinenüberwachung unzureichend macht und schlimmstenfalls zu Störungen der jeweiligen Bearbeitungsprozesse sowie zum Totalausfall wichtiger Funktionen führen kann.A particular problem is the attachment of leads for the electrical signals of the sensors on machine tools, since the extremely loaded components and assemblies on machines such as punching machines in particular large force changes, accelerations and vibrations to which the sensors and the connecting cables are exposed. The attachment or integration of the sensors including the supply line is already taken into account in the machine production, so that necessarily the electrical signals of the sensors according to the prior art via electrical plug contacts are forwarded. These electrical plug contacts form the interface between the moving and extremely loaded assemblies of the machine tools to respective terminals. Conventional plug contacts are due to the high loads by design only for a limited period preserved. By loosening or moving the plug contacts can lead to failure or falsification of the signal transmission, which makes the machine tool monitoring inadequate and can lead to disruptions of the respective machining processes and the total failure of important functions in the worst case.

Nach dem Stand der Technik sind Verbindungseinrichtungen zur elektrischen Verbindung von Kontaktelementen bekannt. Beispielsweise wird in DE 94 12 068 eine solche beschrieben, bei der in einem elektrisch nicht-leitenden Dichtelement ein elastisches Leitelement aus metallhaltigem, elastomeren, leitfähigen Material angeordnet ist. Solche elastomeren und elektrisch leitfähige Kontaktelemente sind ferner aus US 3,701,965 , US 6,752,639 und US 1,290,963 bekannt.According to the prior art, connecting devices for the electrical connection of contact elements are known. For example, in DE 94 12 068 described one in which an elastic guide element made of metal-containing, elastomeric, conductive material is arranged in an electrically non-conductive sealing element. Such elastomeric and electrically conductive contact elements are also made US 3,701,965 . US 6,752,639 and US 1,290,963 known.

Eine Haltevorrichtung zur Verbindung von elektrischen Leitungen ist ferner aus US 2009/0023320 A1 bekannt. Diese Halterungen sind einzelne Module, die in beliebiger Anzahl über Schwalbenschwanzverbindungen zu einem BUS-System zusammengesteckt werden können.A holding device for connecting electrical lines is also made US 2009/0023320 A1 known. These brackets are individual modules that can be put together in any number of dovetail connections to a BUS system.

Es ist daher Aufgabe der vorliegenden Erfindung, eine Halterung der Eingangs genannten Art zu schaffen, mit der eine lösbare Befestigung zweier Leitungen an einer Werkzeugmaschine geschaffen wird, die über einen längstmöglichen Zeitraum eine sichere unverfälschte Signalübertragung ermöglicht, zumindest Wartungszyklen an entsprechenden Anlagen, Maschinen und Vorrichtungen verlängert.It is therefore an object of the present invention to provide a holder of the aforementioned type, with a releasable attachment of two lines is provided on a machine tool, which allows safe undistorted signal transmission over a longest possible period, at least maintenance cycles of the corresponding equipment, machines and devices extended.

Diese Aufgabe wird durch eine Halterung nach Anspruch 1 gelöst, wonach erfindungsgemäß der elektrisch leitfähige Körper aus einem Elastomer mit integrierten elektrisch leitfähigen Partikeln besteht. Entsprechende Werkstoffe sind nach dem Stand der Technik grundlegend bekannt, jedoch bisher noch nicht bei der Überwachung von Werkzeugmaschinen eingesetzt worden. Insbesondere kann das Elastomer ein synthetisch hergestelltes Gummi sein, wobei vorzugsweise ein Silicon-Gummi verwendet wird. Die elektrisch leitfähigen Partikel können beispielsweise aus Graphit bestehen. Alternativ hierzu sind aber auch andere leitfähige Partikel verwendbar. Der elektrisch leitfähige elastische Körper besitzt die Fähigkeit, auftretende Schwingungen oder Relativbewegungen der Kontakte ohne Unterbrechung der elektrischen Verbindung aufzunehmen. Zudem sind elastische Körper nicht wie starre Steck-, Schraub- oder Klebverbindungen bruchgefährdet, was die Langlebigkeit der jeweiligen Bauteile erhöht. Hierdurch wird zudem eine relativ kostengünstige und robuste äußere Gehäuseverbindung geschaffen, in der die Kontakte derart unter Druckspannung gelagert sind, dass eine elektrische Übertragung der Sensorsignale jederzeit gewährleistet ist.This object is achieved by a holder according to claim 1, according to which, according to the invention, the electrically conductive body consists of an elastomer with integrated electrically conductive particles. Corresponding materials are fundamentally known in the prior art, but have not yet been used in the monitoring of machine tools. In particular, the elastomer may be a synthetically made rubber, preferably using a silicone rubber. The electrically conductive particles may consist of graphite, for example. Alternatively, however, other conductive particles can be used. The electrically conductive elastic body has the ability to absorb occurring vibrations or relative movements of the contacts without interrupting the electrical connection. In addition, elastic bodies are not vulnerable to breakage, such as rigid plug-in, screw or adhesive connections, which increases the longevity of the respective components. In this way, in addition, a relatively inexpensive and robust outer housing connection is created, in which the contacts are mounted under compressive stress such that electrical transmission of the sensor signals is ensured at all times.

Vorteilhafte Weiterbildungen der vorliegenden Erfindung sind in den Unteransprüchen sowie im Folgenden beschrieben.Advantageous developments of the present invention are described in the subclaims and in the following.

Nach einer ersten bevorzugten Ausgestaltung der Erfindung sind die Kontakte und der elektrisch leitfähige Körper in einem elektrisch isolierenden Werkstoff im Gehäuse eingebettet, so dass eine genaue Positionierung und Isolierung gegenüber anderen elektrisch leitfähigen Teilen gewährleistet ist. Die Isolationskörper können aus isolierenden Elastomeren oder anderen isolierenden Materialien bestehen. Grundsätzlich können die Kontaktflächen, die elastische Übertragungselemente und die Isolierelemente in Gehäusen unterschiedlicher Form und Größe untergebracht werden. Der elektrische Kontakt wird hierbei durch die Erzeugung von mechanischem Druck der elastischen Körper als Übertragungselementen gegen die Kontaktflächen erzeugt. Die dabei aufgebrachte Druckspannung, denen der elektrisch leitfähige Körper als Vorspannung ausgesetzt wird, muss größer sein als die durch die Schwingungsbewegung erzeugten unterschiedlichen Druckbe- und entlastungen, um einen weitestgehend ungestörten Betrieb zu gewährleisten. Um die Auswirkungen der schwingungsbedingten Druckbe- und entlastungen zu minimieren, ist vorgesehen, dass die elektrischen Leitungen an scheibenförmigen Kontakten angelötet sind, wobei die Lötflächen quer zur Hauptschwingungsrichtung des Werkzeugs oder der Werkzeugmaschine liegen. Idealerweise sind die Lötflächen senkrecht zur Hauptschwingungsrichtung angeordnet. Analog hierzu wird die Druckspannung für den elastischen leitfähigen Körper vorzugsweise parallel zur Schwingungsrichtung der durch den Sensor zu überwachenden Werkzeugmaschinen (als Vorspannung) erzeugt, was ebenfalls den ungestörten Betrieb des Werkzeugs oder der Werkzeugmaschine begünstigt.According to a first preferred embodiment of the invention, the contacts and the electrically conductive body are embedded in an electrically insulating material in the housing, so that an accurate positioning and isolation over other electrically conductive parts is ensured. The insulating bodies may consist of insulating elastomers or other insulating materials. In principle, the contact surfaces, the elastic transmission elements and the insulating elements can be accommodated in housings of different shape and size. The electrical contact is in this case generated by the generation of mechanical pressure of the elastic body as transmission elements against the contact surfaces. The applied compressive stress, which is exposed to the electrically conductive body as a bias, must be greater than the vibration pressure generated by the different pressure and relief to ensure a largely undisturbed operation. In order to minimize the effects of the vibration-related pressure loading and unloading, it is provided that the electrical leads are soldered to disc-shaped contacts, wherein the solder pads are transverse to the main vibration direction of the tool or the machine tool. Ideally, the pads are arranged perpendicular to the main vibration direction. Analogously to this, the compressive stress for the elastic conductive body is preferably generated parallel to the direction of vibration of the machine tools to be monitored by the sensor (as a bias voltage), which likewise favors the undisturbed operation of the tool or of the machine tool.

Zudem ist vorzugsweise vorgesehen, dass die Kontakte und die hieran befestigten Teile der Leitungen in einer isolierenden Gussmasse eingebettet sind, die jeweils in einer Tasche des Gehäuses eingegossen oder eingeklebt ist. Hiermit wird erreicht, dass die betreffenden elektrischen Sensoranschlüsse mechanisch geschützt sind.In addition, it is preferably provided that the contacts and the attached parts of the lines are embedded in an insulating casting compound, which is poured or glued in each case in a pocket of the housing. This ensures that the relevant electrical sensor connections are mechanically protected.

Nach einer weiteren bevorzugten Ausgestaltung der Erfindung liegt die Schraub-oder Steckverbindung zwischen den beiden Gehäuseteilen parallel zur Hauptschwingungsrichtung des Werkzeugs oder der Werkzeugmaschine, so dass der Kontaktschluss zwischen einem der Kontakte und dem elektrisch leitfähigen Körper bei einem Lösen oder Lockern der Schraubverbindung unterbrochen wird und vorzugsweise die Werkzeugmaschine abgeschaltet wird.According to a further preferred embodiment of the invention, the screw or plug connection between the two housing parts is parallel to the main vibration direction of the tool or the machine tool, so that the contact closure between one of the contacts and the electrically conductive body is interrupted in a loosening or loosening of the screw connection and preferably the machine tool is switched off.

Weiterhin ist zur Verbesserung der Kontaktsicherheit vorgesehen, dass die beiden Gehäuseteile im wesentlichen formschlüssig ineinander greifen und/oder der elektrisch leitfähige Körper in einer seiner geometrischen Form angepassten Kavität liegt und von den beiden Gehäuseteilen mit Druck beaufschlagt wird. Hierbei besitzt das erste Gehäuseteil erfindungsgemäß einen Anschlag sowie eine hierzu senkrecht angeordnete Basisplatte, auf der eine zapfenförmige Erhebung ausgebildet ist. Demgegenüber weist das zweite Gehäuseteil eine Basisplatte auf, an deren Stirnseite ein Anschlag ausgebildet ist, wobei in der Basisplatte eine zu der zapfenförmigen Erhebung korrespondierende Ausnehmung ausgebildet ist. Alle Teile sind dabei so ausgestaltet, dass die Anschläge der Gehäuseteile sowie die Ausnehmung und Erhebung im montierten Zustand des Gehäuses im wesentlichen formschlüssig ineinander greifen.Furthermore, it is provided to improve the contact reliability that the two housing parts engage in substantially form-fitting manner and / or the electrically conductive body is in a cavity adapted to its geometric shape and is pressurized by the two housing parts with pressure. In this case, the first housing part according to the invention has a stop and a base plate arranged perpendicular thereto, on which a pin-shaped elevation is formed. In contrast, the second housing part has a base plate, on the front side of a stop is formed, wherein in the base plate a corresponding to the peg-shaped elevation recess is formed. All parts are designed so that the attacks of the housing parts as well as the recess and survey in the mounted state of the housing substantially positively engage with each other.

Das erste Gehäuseteil ist vorzugsweise an dem Werkzeug oder der Werkzeugmaschine mit einer Rund- oder Kantzapfenverbindung und einer zusätzlichen Schraubverbindung fixiert. Eine derartige Verbindung ist vorteilhafterweise relativ robust und vergleichsweise kostengünstig herstellbar.The first housing part is preferably on the tool or the machine tool with a round or cotter pin connection and an additional screw connection fixed. Such a connection is advantageously relatively robust and comparatively inexpensive to produce.

Als besondere Bauform bietet sich für den leitfähigen Körper eine Zylinderform oder eine alternative Bauform an, bei der eine Gruppe von zylinderförmigen Körpern in Führungen in einem Isolationskörper gelagert werden. Das Gehäuse ist dann bevorzugt eine Hülse.As a special design, a cylindrical shape or an alternative design is suitable for the conductive body, in which a group of cylindrical bodies are mounted in guides in an insulating body. The housing is then preferably a sleeve.

Weitere Vorteile der Erfindung sowie konkrete Ausführungsformen werden im Folgenden anhand der Figuren beschrieben. Dabei zeigt

Fig. 1
eine Schnittdarstellung einer nicht erfindungsgemäßen Halterung, aus der der prinzipielle Aufbau ersichtlich ist,
Fig. 2
eine Explosionsdarstellung der Halterung von Fig. 1
Fig. 3
eine Detailansicht eines Isolationskörpers mit darin befestigten elektrisch leitfähigen elastischen Körpern und
Fig. 4a-d
jeweils eine Ausführung der Halterung gemäß der vorliegenden Erfindung.
Further advantages of the invention and specific embodiments are described below with reference to the figures. It shows
Fig. 1
a sectional view of a holder not according to the invention, from which the basic structure is apparent,
Fig. 2
an exploded view of the holder of Fig. 1
Fig. 3
a detail view of an insulating body with therein fixed electrically conductive elastic bodies and
Fig. 4a-d
one embodiment of the holder according to the present invention.

Die in Fig. 1 dargestellte Ausführungsform besteht aus einem Gehäuse, das seinerseits aus zwei Gehäuseteilen 3, 3' gebildet wird, und zu dem jeweilige Leitungen 6, 6' führen, die auf der einen Seite mit dem Sensor und auf der anderen Seite mit einer Signalauswerteinheit verbunden sind. Diese Leitungen besitzen endseitig Kontakte 2, 2' bzw. Kontaktflächen, die über einen elektrisch leitfähigen elastischen Körper 1 elektrisch miteinander verbunden sind. Als elastischen leitfähigen Körper 1 kommen alle Elastomere in Betracht, die mit leitfähigen Partikeln versehen sind. Jeweils randseitig der Gehäuseteile 3, 3' sind unterschiedliche Isolationskörper 4, 4' und 5, 5' vorgesehen.In the Fig. 1 illustrated embodiment consists of a housing, which in turn is formed of two housing parts 3, 3 ', and to the respective lines 6, 6' lead, which are connected on one side with the sensor and on the other side with a signal processing unit. These lines have end contacts 2, 2 'or contact surfaces, which are electrically connected to each other via an electrically conductive elastic body 1. Suitable elastic conductive body 1 are all elastomers which are provided with conductive particles. In each case at the edge of the housing parts 3, 3 ', different insulation bodies 4, 4' and 5, 5 'are provided.

Die Ausführungsform nach Fig. 2 zeigt in einer Explosionsdarstellung einen prinzipiellen ring- bzw. zylinderförmigen Aufbau in einem hülsenförmigen Gehäuse, das wiederum aus den Gehäuseteilen 3, 3' gebildet wird. Die jeweils randseitig dargestellten Gehäuseteile 3, 3' werden mittels einer Steck- oder Gewindeverbindung oder ggf. auch durch Kleben miteinander verbunden. Im Übrigen wird auf die Ausführungen zu Fig. 1 verwiesen.The embodiment according to Fig. 2 shows an exploded view of a basic ring or cylindrical structure in a sleeve-shaped housing, which in turn is formed from the housing parts 3, 3 '. The housing parts 3, 3 ', which are each shown at the edge, are connected to one another by means of a plug-in or threaded connection or possibly also by gluing. Incidentally, the comments on Fig. 1 directed.

Fig. 3 zeigt eine konkrete Ausführungsform für einen scheibenförmigen Isolationskörper 5, in dem jeweils in acht vorgesehenen Bohrungen als Führungen elastische leitfähige Körper 1 eingesetzt sind. Diese acht elastischen leitfähigen Körper 1 stehen, wie zuvor beschrieben, unter einer Druckspannung und kontaktieren beidseitig jeweilige Kontakte 2 (vgl. Fig. 2). Fig. 3 shows a concrete embodiment of a disc-shaped insulating body 5, in which each provided in eight holes as guides elastic conductive body 1 are used. These eight elastic conductive body 1 are, as described above, under a compressive stress and contact on both sides respective contacts 2 (see. Fig. 2 ).

Die Fig. 4 a-d zeigen je eine erste Ausgestaltung der Halterung in unterschiedlichen Ansichten.The Fig. 4 ad show a first embodiment of the holder in different views.

Bei der in Fig. 4a dargestellten Ausführungsform ist in schematischer Weise ein Sensor 8 an einer Werkzeugmaschine 7, insbesondere einer Stanzmaschine, angedeutet. Über Leitungen 9 sind die Kontakte 10 mit dem Sensor 8 verbunden, der selbst im Maschinengehäuse geschützt integriert ist.At the in Fig. 4a illustrated embodiment, a sensor 8 on a machine tool 7, in particular a punching machine, indicated in a schematic manner. Via lines 9, the contacts 10 are connected to the sensor 8, which is integrated protected even in the machine housing.

Die Kontakte 10 sind in einer Vergussmasse 11 eingebettet, die wiederum in einer Tasche des ersten Gehäuseteils 12 angeordnet ist. Das erste Gehäuseteil 12 ist mit dem zweiten Gehäuseteil 13 fest verbunden und nimmt Kontakte 15 in einer Vergussmasse 16 auf. Diese Kontakte 15 sind über Leitungen 14 mit der Auswerteinrichtung verbunden. Bezugszeichen 17 bezeichnet einen ringförmigen Isolationskörper. Der elastisch leitfähige Körper 18 ist unter Druckvorspannung zwischen den Kontakten 10 und 15 eingelegt, wobei die Druckvorspannung parallel zur Richtung 19 aufgebaut ist, denen der Sensor 8 ausgesetzt ist.The contacts 10 are embedded in a potting compound 11, which in turn is arranged in a pocket of the first housing part 12. The first housing part 12 is fixedly connected to the second housing part 13 and receives contacts 15 in a potting compound 16. These contacts 15 are connected via lines 14 to the evaluation device. Reference numeral 17 denotes an annular insulating body. The elastically conductive body 18 is inserted under pressure bias between the contacts 10 and 15, wherein the pressure bias is constructed parallel to the direction 19 to which the sensor 8 is exposed.

Fig. 4b zeigt eine Halterung im nicht montierten Zustand. Um einen möglichst stabilen Sitz zu ermöglichen, weist das erste Gehäuseteil 12 einen Anschlag 20 sowie eine hierzu senkrecht angeordnete Basisplatte 21 auf, auf der eine (in Fig. 4b nicht dargestellte) zapfenförmige Erhebung ausgebildet ist. Am rückwärtigen Ende des Anschlags 20 ist ein Rundzapfen 22 vorgesehen, der zusammen mit einer korrespondierenden Ausnehmung im Werkzeug eine lösbare Verbindung bildet. Das zweite Gehäuseteil 13 besitzt ebenfalls einen Anschlag 24 und eine Basisplatte 25, wobei beide Oberflächen korrespondierend zu dem ersten Gehäuseteil 12 ausgebildet sind, so dass ein leichtes und passgenaues Ineinanderschieben bzw. -stecken der Gehäuseteile 12, 13 ermöglicht wird. Fig. 4b shows a holder in the unassembled state. In order to allow a stable as possible seat, the first housing part 12 has a stop 20 and a perpendicular thereto arranged base plate 21 on which a (in Fig. 4b not shown) is formed peg-shaped survey. At the rear end of the stopper 20, a round pin 22 is provided, which forms a releasable connection together with a corresponding recess in the tool. The second housing part 13 also has a stop 24 and a base plate 25, wherein both surfaces are formed corresponding to the first housing part 12, so that a slight and accurate telescoping or -becken the housing parts 12, 13 is made possible.

In den Fig. 4c und d ist eine solche Halterung in Explosionsdarstellung zu erkennen. Insbesondere in der dreidimensionalen Ansicht (Fig. 4d) ist die zapfenförmige Erhebung 26 auf der Basisplatte 21 gezeigt, die korrespondierend zu der Ausnehmung 27 innerhalb der Basisplatte 25 des Gehäuseteils 13 ausgebildet ist.In the Fig. 4c and d is such a holder in exploded view to recognize. Especially in the three-dimensional view ( Fig. 4d ), the pin-shaped projection 26 is shown on the base plate 21, which is formed corresponding to the recess 27 within the base plate 25 of the housing part 13.

Claims (11)

  1. Holder for detachable electrical connection of two lines (9, 14), whereby the holder is connectable with a tool or a machine tool (7), in particular with a stamping tool or a stamping machine, that has a sensor (8) whose electrical signals are transmittable to a monitoring device arranged outside the machine tool (7) or the tool, with a housing comprising a first and a second housing part (12, 13), which are detachable connected with each other by a screwed joint or a plug-in connection, in which each of th lines (9, 14) are fixed with electrical contacts (10, 15), whereby the first housing part (12) is detachable connected at the tool or at the machine tool (7) and the second housing part (13) is connectable with the first housing part (12) in such a manner, that the contacts (10, 15) are connected by an electroconductive under a compressional stress clamped body (18), whereby the first housing part (12) has a stop (20) and a basis plate (21) arranged perpendicular thereto, on which a conical bump (26) is designed and whereby the second housing part (13) has a basis plate (25) with a recess (27) corresponding to the conical bump (26), on whose front face a stop (24) is arranged
    characterised in that
    the electroconductive body (18) consists of an elastomer with incorporated electroconductive particles.
  2. Holder according claim 1, characterised in that the elastomer is a synthetically manufactured rubber, in particular a silicon-rubber, and/or the electroconductive particles consist of graphite.
  3. Holder according one of the claims 1 to 2, characterised in that the contacts (10, 15) and the electroconductive body (18) are embedded in an electrical isolating material.
  4. Holder according one of the claims 1 to 3, characterised in that the electric lines (9, 14) are soldered at disk-shaped contacts (10, 15) whereby the solder areas lie across the main oscillation direction (19) of the tool or the machine tool (7).
  5. Holder according one of the claims 1 to 4, characterised in that the compressive stress for the electroconductive body (18) lies parallel to the oscillation direction of the machine tool (7) or a tool monitored by the sensor (8).
  6. Holder according one of the claims 1 to 5, characterised in that the contacts (10, 15) and the parts of the lines fixed thereto are embedded in an isolating pourable compound (11, 16), which each are casted or glued into a pocket of the housing part (12, 13).
  7. Holder according claim 1, characterised in that the screwed joint or the plug-in connection between both housing parts (12, 13) lie parallel to the main oscillation direction (19) of the tool or the machine tool (7), so that the contact between one of the contacts (10, 15) and the electroconductive body (18) willl be interrupted by the loosing or the releasing of the screwed joint and the tool will be preferably switched off.
  8. Holder according of the claims 1 to 7, characterised in that both housing parts (12, 13) interlock substantially positively and/or the electricoconductive body (18) lies in a cavity adapted to its geometrical form and is pressurised by both housing parts (12, 13).
  9. Holder according one of the claims 1 to 8, characterised in that the stops (20, 24) and the basis plates (21, 25) of the housing parts (12, 13) and the recess (27) and the bump (26) interlock essentially positively in the assembled state.
  10. Holder according one of the claims 1 to 9, characterised in that the first housing part (12) is fixed with a round- or square-shaped cone connection and an additional screwed joint at the tool or the machine tool (7).
  11. Holder according one of the claims 1 to 10, characterised in that the electroconductive body (18) is cylindrical or are composed of a group of cylindrical bodies (18), who are arranged in guidances in an isolating body in the housing and/or that the housing is a sleeve.
EP10160107.8A 2009-04-24 2010-04-16 Electrical connection to a sensor in a tool or a machine Not-in-force EP2244335B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200920006093 DE202009006093U1 (en) 2009-04-24 2009-04-24 Means for transmitting electrical signals under extreme mechanical loads based on electrically conductive elastomers
DE200920016333 DE202009016333U1 (en) 2009-12-01 2009-12-01 Means for transmitting electrical signals and electrical variables in a special design when used on fast-moving punching tools

Publications (2)

Publication Number Publication Date
EP2244335A1 EP2244335A1 (en) 2010-10-27
EP2244335B1 true EP2244335B1 (en) 2016-10-26

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ID=42342596

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10160107.8A Not-in-force EP2244335B1 (en) 2009-04-24 2010-04-16 Electrical connection to a sensor in a tool or a machine

Country Status (2)

Country Link
EP (1) EP2244335B1 (en)
ES (1) ES2612185T3 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020004343A1 (en) * 2000-07-07 2002-01-10 Fumio Morikawa Signal input/output apparatus
EP1251595A1 (en) * 2001-04-20 2002-10-23 Murr-Elektronik Gesellschaft mit beschränkter Haftung Modular control apparatus for control and automatic systems
US20050096554A1 (en) * 2002-11-27 2005-05-05 Dudik Evan M. Acoustic medical sensor for ultrasound imaging
US20090023320A1 (en) * 2007-07-20 2009-01-22 Numatics, Incorporated Modular electrical bus system

Family Cites Families (4)

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Publication number Priority date Publication date Assignee Title
BE756130A (en) * 1969-09-15 1971-03-15 Essex International Inc PRESSURE SENSITIVE SWITCH-CUTTER COMBINATION
US3701965A (en) * 1971-07-28 1972-10-31 Essex International Inc Connector for electrical terminals
DE9412068U1 (en) * 1994-07-26 1994-09-15 Festo Kg Connection device for electrical connection of contact elements
US6752639B1 (en) * 2003-02-20 2004-06-22 Tyco Electronics Corporation Elastomeric connector assembly and method for producing the assembly

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020004343A1 (en) * 2000-07-07 2002-01-10 Fumio Morikawa Signal input/output apparatus
EP1251595A1 (en) * 2001-04-20 2002-10-23 Murr-Elektronik Gesellschaft mit beschränkter Haftung Modular control apparatus for control and automatic systems
US20050096554A1 (en) * 2002-11-27 2005-05-05 Dudik Evan M. Acoustic medical sensor for ultrasound imaging
US20090023320A1 (en) * 2007-07-20 2009-01-22 Numatics, Incorporated Modular electrical bus system

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Publication number Publication date
EP2244335A1 (en) 2010-10-27
ES2612185T3 (en) 2017-05-12

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