EP3388165B1 - Self-piercing rivet setting device and production device - Google Patents

Self-piercing rivet setting device and production device Download PDF

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Publication number
EP3388165B1
EP3388165B1 EP18160619.5A EP18160619A EP3388165B1 EP 3388165 B1 EP3388165 B1 EP 3388165B1 EP 18160619 A EP18160619 A EP 18160619A EP 3388165 B1 EP3388165 B1 EP 3388165B1
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EP
European Patent Office
Prior art keywords
punch
rivet
components
damping material
frame
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.)
Active
Application number
EP18160619.5A
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German (de)
French (fr)
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EP3388165A1 (en
Inventor
Florian Woelke
Armin Karle
Steven Maul
Reiner Ramsayer
Christoph Kauth
Martin Dieterle
Andre Philipskoetter
Patrick Nickel
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Robert Bosch GmbH
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Robert Bosch GmbH
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Publication date
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Publication of EP3388165A1 publication Critical patent/EP3388165A1/en
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Publication of EP3388165B1 publication Critical patent/EP3388165B1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J15/00—Riveting
    • B21J15/02—Riveting procedures
    • B21J15/025—Setting self-piercing rivets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J15/00—Riveting
    • B21J15/10—Riveting machines
    • B21J15/12—Riveting machines with tools or tool parts having a movement additional to the feed movement, e.g. spin

Definitions

  • the present invention relates to a punch riveting apparatus for connecting at least two components, and to a production apparatus having such a punch riveting apparatus.
  • Riveting serve to connect at least two in a connection region in particular flat trained components (joint partner).
  • a punch riveting method is characterized, for example, by the fact that pre-punching of the components to be joined together is not required. Instead, a rivet is pressed into the at least two components by means of a joining tool comprising a punch, it being possible to ensure that the rivet or the components by a correspondingly shaped counter-holder, for example in the form of a die, which cooperates with the joining tool deform in a certain way to produce a positive and positive connection between the components.
  • a punch riveting apparatus in which a ram is set in vibration to press a rivet into components.
  • acting as a counter-holder for the components die is a spring element in or on Mounted frame, wherein instead of the spring element and an elastomer can be used.
  • a punch riveting device serves for connecting at least two components by means of a rivet and has a frame on which a joining tool and an anvil are arranged such that the at least two components can be arranged between the joining tool and the counter holder during the indentation of the rivet by means of the joining tool , Furthermore, the punch riveting device has a vibration generator which is set up to vibrate at least one component involved in pressing in of the rivet into the at least two components during oscillation during at least one operating phase.
  • a stamp can be used as part of the joining tool.
  • the counter-holder can be provided for example in the form of a die on the opposite side of the stamp the at least two components.
  • a vibration generator is in particular a sound generator, in particular an ultrasonic generator, into consideration.
  • the rivet and / or the punch and / or the counter-holder and / or at least one of the at least two components come into consideration as the at least one component involved in pressing in the rivet which is set in vibration.
  • the stamp is simultaneously used as a sonotrode and is connected via a booster with a vibration converter, each as part of a set unit, which in turn connected to the vibrator is.
  • the frame which may be present in particular in the form of a so-called. C-frame or C-bracket, are decoupled from the component in question with respect to a vibration transmission.
  • the damping material may in particular have a natural frequency which is less than an excitation frequency of the vibration generator. It is particularly preferred if the damping material is at most half, preferably at most one fifth, more preferably at most one tenth, the excitation frequency of the vibrator. In this way, the vibration amplitude forming within the frame can be reduced by a factor of up to 100.
  • the damping material has a strength of at least 20 MPa, and according to the invention has a modulus of elasticity of at least 5000 MPa.
  • the modulus of elasticity should be chosen so that an elastic deformation of the material remains below 0.02 mm.
  • the damping material according to the invention is an elastic material in the form of a polymer, in particular a technical thermoplastic, in question.
  • a polymer in particular a technical thermoplastic
  • other negative influences such as a strong noise or a transmission of vibrations to other components or devices such as a robot arm, on which the punch riveting is attached, avoided.
  • the at least one of the components involved in the at least two components and arranged on the frame when the rivet is pressed in, between which and the frame the damping material is provided preferably comprises the counterholder. While in other involved in impressing components, such as in particular the joining tool or the stamp, other possibilities as a damping material for at least partial decoupling of vibrations are conceivable, such as an attachment in a node, a connection between the anvil and the frame is necessary the particularly good forces, as they arise when pressing the rivet, can absorb. This can be done by providing the aforementioned damping material, since in this case a large-area attachment is possible.
  • a material block is provided between the counterholder and the damping material.
  • This block of material may for example consist of the same material as the die.
  • This additional block of material allows a further reduction in the transmitted vibrations, since this block of material can absorb some of the vibrations.
  • a mass of the material block is more than the mass of the counter-holder, preferably at least ten times, more preferably at least one hundred times, the mass of the counter-holder.
  • a production device has a punch riveting device according to the invention. To avoid repetition, reference is made to the above remarks on the punch riveting apparatus with regard to the advantages and further refinements of the production apparatus.
  • FIG. 1 is simplified and schematically illustrated a manufacturing device 100 according to the invention with a punch rivet 10 according to the invention in a preferred embodiment.
  • the manufacturing device 100 may be, for example, an industrial robot in a production hall, for example for an automobile body shop.
  • the production device 100 has a carrier structure 3 arranged on a base and two arms 4 and 5 arranged thereon and connected to one another and movable. At the end of the arm 5, the punch rivet 10 is arranged, which will be described in more detail below.
  • a computing unit 80 is shown, which is, for example, a control unit for the punch riveting apparatus 10.
  • the arithmetic unit 80 may also be used as a control unit for the entire manufacturing facility, i. be provided in addition to the punch riveting especially for the control of the movable arms.
  • display means 90 for example a display, are provided on which current operating parameters of the punch riveting apparatus can be displayed.
  • the element 90 can also be a combined display / input device, for example a touchscreen.
  • FIG. 2 schematically a punch rivet 10 according to the invention is shown in a preferred embodiment.
  • the punch riveting apparatus 10 has a frame 60, which is preferably in the form of a C-frame or C-bracket, on which the individual components are usually arranged in a punch riveting apparatus in order to be able to assume the desired position relative to one another.
  • the punch rivet 10 for example, on an arm as in FIG. 1 be shown attached.
  • the punch riveting apparatus 10 has a punch 15, by way of example with a round cross section.
  • the punch 15 is radially surrounded by a (sleeve-shaped) hold-down 16 and arranged movable relative to this in the longitudinal direction.
  • the hold-down is fastened by means of a spring on the punch 15.
  • the punch 15 and the hold-down 16 in this case form a joining tool 70.
  • the punch 15 is coupled to a drive 50 which serves to apply a force F required to press the rivet 20 into the two components 11, 12.
  • the drive 50 can be controlled, for example, by means of the computing unit 80.
  • the hold-down 16 is adapted to press against the surface of the die 15 facing member 11 with a hold-down force.
  • a counter-holder in the form of a die 18 is arranged on the stamp 15 and the hold-down 16 opposite side of the two components 11, 12, a counter-holder in the form of a die 18 is arranged.
  • the stamp 15 is in the vertical direction, as well as the hold-16, movably arranged and relative to the die 18 movable.
  • the hold-down 16 and the die 18 serve to clamp or compress the two components 11, 12 between the hold-down 16 and the die 18 during processing by the punch 15.
  • the rivet 20 here by way of example a half-tubular rivet, preferably consists of a material which is harder than the materials of the two components 11, 12, at least in the region of a rivet shank.
  • the component 11 facing away from the flat top of the rivet is arranged in operative connection with the punch 15, which rests flat against the top of the rivet 20.
  • the punch 15 is connected to a (mechanical) vibration converter 30, which can be excited via a vibration generator 32, in particular an ultrasonic generator, for generating vibrations.
  • a vibration generator 32 in particular an ultrasonic generator
  • ultrasonic vibrations with an amplitude (distance between the maximum positive and negative amplitude of a vibration) between 10 .mu.m and 110 .mu.m (corresponding to an amplitude of 5 .mu.m to 55 .mu.m) and a frequency between 15 kHz and 35 kHz or possibly higher generated ,
  • These vibrations are coupled from the vibration converter 30 via a booster 31 and the punch 15, which also serves as a sonotrode, in the rivet 20.
  • the joining tool 70, the booster 31 and the oscillation converter 30 form a setting unit 71.
  • the drive 50 can be, for example, a drive with ball, roller or planetary screw drive or the like, which is suitable for applying a force F for pressing in the rivet 20 into the components 11, 12.
  • the booster 31 and above the vibration converter 32 with the punch 15 and the hold-16 are mounted by means of a holding device 35.
  • the counter-holder 18 which is designed here in the form of a die, is fastened on or in the material block 62.
  • the block of material 62 has a significantly greater mass than the counter-holder 18, whereby a large part of the vibrations, which are transmitted by the joining tool 70 via the components on the anvil when the rivet is pressed in, are already absorbed.
  • the block of material 62 is mounted on a damping material 61, which in turn is mounted on the frame 60.
  • the damping material 61 forms a kind of intermediate layer between the material block 62 and the frame 60.
  • the attachment of the material block 62 on the damping material 61, as well as that of the damping material 61 on the frame 60 for example, by gluing or other suitable fastening methods.
  • the damping material for example a polymer, in particular a technical thermoplastic, with suitable values for the modulus of elasticity and strength and in particular a natural frequency which is significantly lower than the excitation frequency of the vibrator, further decoupling of the counter-holder 18 from the frame 60 in terms a vibration transmission take place.
  • An excitation of the damping material to vibrations is hardly possible due to the low natural frequency, whereby the decoupling is achieved.
  • block of material 62 may also be omitted, in which case the counter-holder 18 is suitably secured to the cushioning material 61.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Insertion Pins And Rivets (AREA)
  • Connection Of Plates (AREA)

Description

Die vorliegende Erfindung betrifft eine Stanznietvorrichtung zum Verbinden wenigstens zweier Bauteile, sowie eine Fertigungseinrichtung mit einer solchen Stanznietvorrichtung.The present invention relates to a punch riveting apparatus for connecting at least two components, and to a production apparatus having such a punch riveting apparatus.

Stand der TechnikState of the art

Nietverfahren dienen zum Verbinden wenigstens zweier in einem Verbindungsbereich insbesondere eben ausgebildeter Bauteile (Fügepartner). Ein Stanznietverfahren zeichnet sich beispielsweise dadurch aus, dass ein Vorlochen der miteinander zu verbindenden Bauteile nicht erforderlich ist. Vielmehr wird ein Niet mittels eines Fügewerkzeugs, das einen Stempel umfasst, in die wenigstens zwei Bauteile eingedrückt, wobei durch einen entsprechend geformten Gegenhalter, bspw. in Form einer Matrize, der mit dem Fügewerkzeug zusammenwirkt, sichergestellt werden kann, dass der Niet oder die Bauteile sich in einer bestimmten Art und Weise verformen, um eine kraft- und formschlüssige Verbindung zwischen den Bauteilen herzustellen.Riveting serve to connect at least two in a connection region in particular flat trained components (joint partner). A punch riveting method is characterized, for example, by the fact that pre-punching of the components to be joined together is not required. Instead, a rivet is pressed into the at least two components by means of a joining tool comprising a punch, it being possible to ensure that the rivet or the components by a correspondingly shaped counter-holder, for example in the form of a die, which cooperates with the joining tool deform in a certain way to produce a positive and positive connection between the components.

Weiterhin ist beispielsweise aus der EP 2 318 161 B1 ein sog. Ultraschall-Stanznietverfahren bekannt, bei dem ein Schwingungserzeuger, wie beispielsweise ein Ultraschall-Generator verwendet wird, um ein oder mehrere Komponenten beim Verbinden der Bauteile in Schwingung zu versetzen. Durch diese Schwingung wird beispielsweise die aufzuwendende Kraft zum Eindrücken des Niets reduziert.Furthermore, for example, from the EP 2 318 161 B1 a so-called ultrasonic punch riveting method in which a vibrator such as an ultrasonic generator is used to vibrate one or more components in connecting the components. By this vibration, for example, the force to be applied for pressing the rivet is reduced.

Aus der gattungsgemäßen EP 0 890 397 A1 ist eine Stanznietvorrichtung bekannt, bei der ein Stempel in Schwingungen versetzt wird, um einen Niet in Bauteile einzudrücken. Dabei ist eine als Gegenhalter für die Bauteile fungierende Matrize über ein Federelement im bzw. am Rahmen gelagert, wobei anstelle des Federelements auch ein Elastomer verwendet werden kann.From the generic EP 0 890 397 A1 a punch riveting apparatus is known in which a ram is set in vibration to press a rivet into components. In this case, acting as a counter-holder for the components die is a spring element in or on Mounted frame, wherein instead of the spring element and an elastomer can be used.

Offenbarung der ErfindungDisclosure of the invention

Erfindungsgemäß werden eine Stanznietvorrichtung und eine Fertigungseinrichtung mit den Merkmalen der unabhängigen Patentansprüche vorgeschlagen. Vorteilhafte Ausgestaltungen sind Gegenstand der Unteransprüche sowie der nachfolgenden Beschreibung.According to the invention, a punch riveting device and a production device with the features of the independent patent claims are proposed. Advantageous embodiments are the subject of the dependent claims and the following description.

Eine erfindungsgemäße Stanznietvorrichtung dient zum Verbinden wenigstens zweier Bauteile mittels eines Niets und weist einen Rahmen auf, an dem ein Fügewerkzeug und ein Gegenhalter derart angeordnet sind, dass die wenigstens zwei Bauteile während des Eindrückens des Niets mittels des Fügewerkzeugs zwischen dem Fügewerkzeug und dem Gegenhalter anordenbar sind. Weiterhin weist die Stanznietvorrichtung einen Schwingungserzeuger auf, der dazu eingerichtet ist, während wenigstens einer Betriebsphase wenigstens eine beim Eindrücken des Niets in die wenigstens zwei Bauteile beteiligte Komponente beim Eindrücken in Schwingung zu versetzen. Zum Eindrücken des Niets kann dabei insbesondere ein Stempel als Teil des Fügewerkzeugs verwendet werden. Der Gegenhalter kann beispielsweise in Form einer Matrize auf der dem Stempel gegenüberliegenden Seite der wenigstens zwei Bauteile vorgesehen sein. Als Schwingungserzeuger kommt dabei insbesondere ein Schall-Generator, insbesondere ein Ultraschall-Generator, in Betracht. Als die wenigstens eine beim Eindrücken des Niets beteiligte Komponente, die in Schwingung versetzt wird, kommen insbesondere der Niet und/oder der Stempel und/oder der Gegenhalter und/oder wenigstens eines der wenigstens zwei Bauteile in Betracht. Denkbar ist im Falle des Stempels als derjenigen Komponente, die in Schwingung versetzt wird, dass der Stempel gleichzeitig als Sonotrode dient bzw. ausgebildet ist und über einen Booster mit einem Schwingungskonverter, jeweils als Teil einer Setzeinheit, verbunden ist, welcher wiederum an den Schwingungserzeuger angebunden ist.A punch riveting device according to the invention serves for connecting at least two components by means of a rivet and has a frame on which a joining tool and an anvil are arranged such that the at least two components can be arranged between the joining tool and the counter holder during the indentation of the rivet by means of the joining tool , Furthermore, the punch riveting device has a vibration generator which is set up to vibrate at least one component involved in pressing in of the rivet into the at least two components during oscillation during at least one operating phase. For impressing the rivet, in particular a stamp can be used as part of the joining tool. The counter-holder can be provided for example in the form of a die on the opposite side of the stamp the at least two components. As a vibration generator is in particular a sound generator, in particular an ultrasonic generator, into consideration. In particular, the rivet and / or the punch and / or the counter-holder and / or at least one of the at least two components come into consideration as the at least one component involved in pressing in the rivet which is set in vibration. It is conceivable in the case of the stamp as that component which is set in vibration that the stamp is simultaneously used as a sonotrode and is connected via a booster with a vibration converter, each as part of a set unit, which in turn connected to the vibrator is.

Es ist nun zwischen wenigstens einer der beim Eindrücken des Niets in die wenigstens zwei Bauteile beteiligten und am Rahmen angeordneten Komponenten und dem Rahmen ein Dämpfungsmaterial zur Dämpfung von Schwingungen vorgesehen. Durch eine solche Schwingungsdämpfung kann der Rahmen, der insbesondere in Form eines sog. C-Rahmens bzw. C-Bügels vorliegen kann, von der betreffenden Komponente hinsichtlich einer Schwingungsübertragung entkoppelt werden. Hierzu kann das Dämpfungsmaterial insbesondere eine Eigenfrequenz aufweisen, die geringer als eine Erregerfrequenz des Schwingungserzeugers ist. Besonders bevorzugt ist dabei, wenn das Dämpfungsmaterial höchstens die Hälfte, vorzugsweise höchstens ein Fünftel, besonders bevorzugt höchstens ein Zehntel, der Erregerfrequenz des Schwingungserzeugers beträgt. Auf diese Weise kann die sich im Rahmen ausbildende Schwingungsamplitude um einen Faktor von bis zu 100 reduziert werden.It is now provided between at least one of the involved in pressing the rivet in the at least two components and arranged on the frame components and the frame a damping material for damping vibrations. By such Vibration damping, the frame, which may be present in particular in the form of a so-called. C-frame or C-bracket, are decoupled from the component in question with respect to a vibration transmission. For this purpose, the damping material may in particular have a natural frequency which is less than an excitation frequency of the vibration generator. It is particularly preferred if the damping material is at most half, preferably at most one fifth, more preferably at most one tenth, the excitation frequency of the vibrator. In this way, the vibration amplitude forming within the frame can be reduced by a factor of up to 100.

Vorzugsweise weist das Dämpfungsmaterial eine Festigkeit von wenigstens 20 MPa auf, und erfindungsgemäß einen Elastizitätsmodul von wenigstens 5000 MPa. Zweckmäßigerweise ist der Elastizitätsmodul so zu wählen, dass eine elastische Verformung des Materials unterhalb von 0,02 mm bleibt.Preferably, the damping material has a strength of at least 20 MPa, and according to the invention has a modulus of elasticity of at least 5000 MPa. Conveniently, the modulus of elasticity should be chosen so that an elastic deformation of the material remains below 0.02 mm.

Als Dämpfungsmaterial kommt erfindungsgemäß ein elastisches Material in Form eines Polymers, insbesondere ein technisches Thermoplast, in Frage. Auf diese Weise werden zudem andere negative Einflüsse wie beispielsweise eine starke Geräuschentwicklung oder eine Übertragung der Schwingungen auf weitere Komponenten oder Geräte wie beispielsweise einen Roboterarm, an dem die Stanznietvorrichtung befestigt ist, vermieden.The damping material according to the invention is an elastic material in the form of a polymer, in particular a technical thermoplastic, in question. In this way, in addition other negative influences such as a strong noise or a transmission of vibrations to other components or devices such as a robot arm, on which the punch riveting is attached, avoided.

Vorzugsweise umfasst die wenigstens eine der beim Eindrücken des Niets in die wenigstens zwei Bauteile beteiligten und am Rahmen angeordneten Komponenten, zwischen welcher und dem Rahmen das Dämpfungsmaterial vorgesehen ist, den Gegenhalter. Während bei anderen beim Eindrücken beteiligten Komponenten, wie insbesondere dem Fügewerkzeug bzw. dem Stempel, auch andere Möglichkeiten als Dämpfungsmaterial zur wenigstens teilweisen Entkopplung von Schwingungen denkbar sind, wie z.B. eine Befestigung in einem Schwingungsknoten, ist zwischen dem Gegenhalter und dem Rahmen eine Verbindung nötig, die besonders gut Kräfte, wie sie beim Eindrücken des Niets entstehen, aufnehmen kann. Dies kann durch das Vorsehen des erwähnten Dämpfungsmaterials erfolgen, da hierbei eine großflächige Anbringung möglich ist.The at least one of the components involved in the at least two components and arranged on the frame when the rivet is pressed in, between which and the frame the damping material is provided, preferably comprises the counterholder. While in other involved in impressing components, such as in particular the joining tool or the stamp, other possibilities as a damping material for at least partial decoupling of vibrations are conceivable, such as an attachment in a node, a connection between the anvil and the frame is necessary the particularly good forces, as they arise when pressing the rivet, can absorb. This can be done by providing the aforementioned damping material, since in this case a large-area attachment is possible.

Weiterhin ist es bevorzugt, wenn zwischen dem Gegenhalter und dem Dämpfungsmaterial ein Materialblock vorgesehen ist. Dieser Materialblock kann dabei beispielsweise aus demselben Material wie die Matrize bestehen. Dieser zusätzliche Materialblock ermöglicht eine weitere Reduzierung der übertragenen Schwingungen, da dieser Materialblock einen gewissen Teil der Schwingungen aufnehmen kann. Insofern ist es auch besonders bevorzugt, wenn eine Masse des Materialblocks mehr als die Masse des Gegenhalters, vorzugsweise wenigstens das Zehnfache, weiter vorzugsweise wenigstens das Hundertfache, der Masse des Gegenhalters beträgt.Furthermore, it is preferred if a material block is provided between the counterholder and the damping material. This block of material may for example consist of the same material as the die. This additional block of material allows a further reduction in the transmitted vibrations, since this block of material can absorb some of the vibrations. In this respect, it is also particularly preferred if a mass of the material block is more than the mass of the counter-holder, preferably at least ten times, more preferably at least one hundred times, the mass of the counter-holder.

Eine erfindungsgemäße Fertigungseinrichtung weist eine erfindungsgemäße Stanznietvorrichtung auf. Zur Vermeidung von Wiederholungen sei bezüglich der Vorteile und weiterer Ausgestaltungen der Fertigungseinrichtung auf obige Ausführungen zur Stanznietvorrichtung verwiesen.A production device according to the invention has a punch riveting device according to the invention. To avoid repetition, reference is made to the above remarks on the punch riveting apparatus with regard to the advantages and further refinements of the production apparatus.

Weitere Vorteile und Ausgestaltungen der Erfindung ergeben sich aus der Beschreibung und der beiliegenden Zeichnung.Further advantages and embodiments of the invention will become apparent from the description and the accompanying drawings.

Die Erfindung ist anhand eines Ausführungsbeispiels in der Zeichnung schematisch dargestellt und wird im Folgenden unter Bezugnahme auf die Zeichnung ausführlich beschrieben.The invention is illustrated schematically with reference to an embodiment in the drawing and will be described in detail below with reference to the drawing.

Figurenbeschreibung

Figur 1
zeigt vereinfacht und schematisch eine erfindungsgemäße Fertigungseinrichtung in einer bevorzugten Ausführungsform.
Figur 2
zeigt schematisch eine erfindungsgemäße Stanznietvorrichtung in einer bevorzugten Ausführungsform.
Figur 3
zeigt einen Ausschnitt aus Figur 2 in detaillierterer Ansicht.
figure description
FIG. 1
shows simplified and schematically a manufacturing device according to the invention in a preferred embodiment.
FIG. 2
schematically shows a punch riveting apparatus according to the invention in a preferred embodiment.
FIG. 3
shows a section FIG. 2 in more detailed view.

Detaillierte Beschreibung der ZeichnungDetailed description of the drawing

In Figur 1 ist vereinfacht und schematisch eine erfindungsgemäße Fertigungseinrichtung 100 mit einer erfindungsgemäßen Stanznietvorrichtung 10 in einer bevorzugten Ausführungsform dargestellt. Bei der Fertigungseinrichtung 100 kann es sich beispielsweise um einen Industrieroboter in einer Fertigungshalle, beispielsweise für einen automobilen Karosseriebau, handeln.In FIG. 1 is simplified and schematically illustrated a manufacturing device 100 according to the invention with a punch rivet 10 according to the invention in a preferred embodiment. The manufacturing device 100 may be, for example, an industrial robot in a production hall, for example for an automobile body shop.

Die Fertigungseinrichtung 100 weist dabei eine auf einem Boden angeordnete Trägerstruktur 3 und zwei daran angeordnete, miteinander verbundene und bewegliche Arme 4 und 5 auf. Am Ende des Armes 5 ist die Stanznietvorrichtung 10 angeordnet, welche nachfolgend noch detaillierter beschrieben wird.In this case, the production device 100 has a carrier structure 3 arranged on a base and two arms 4 and 5 arranged thereon and connected to one another and movable. At the end of the arm 5, the punch rivet 10 is arranged, which will be described in more detail below.

Weiterhin ist eine Recheneinheit 80 gezeigt, bei der es sich beispielsweise um eine Steuereinheit für die Stanznietvorrichtung 10 handelt. Die Recheneinheit 80 kann zudem auch als Steuereinheit für die gesamte Fertigungseinrichtung, d.h. neben der Stanznietvorrichtung insbesondere auch für die Ansteuerung der beweglichen Arme vorgesehen sein. Weiterhin sind Anzeigemittel 90, beispielsweise ein Display, vorgesehen, auf denen aktuelle Betriebsparameter der Stanznietvorrichtung angezeigt werden können. Es kann sich bei dem Element 90 auch um ein kombiniertes Anzeige-/Eingabemittel, beispielsweise einen Touchscreen, handeln.Furthermore, a computing unit 80 is shown, which is, for example, a control unit for the punch riveting apparatus 10. The arithmetic unit 80 may also be used as a control unit for the entire manufacturing facility, i. be provided in addition to the punch riveting especially for the control of the movable arms. Furthermore, display means 90, for example a display, are provided on which current operating parameters of the punch riveting apparatus can be displayed. The element 90 can also be a combined display / input device, for example a touchscreen.

In Figur 2 ist schematisch eine erfindungsgemäße Stanznietvorrichtung 10 in einer bevorzugten Ausführungsform dargestellt. Die Stanznietvorrichtung 10 weist einen Rahmen 60 auf, der vorzugsweise in Form eines C-Rahmens oder C-Bügels vorliegt, an welchem die einzelnen Komponenten bei einer Stanznietvorrichtung in der Regel angeordnet sind, um die gewünschte Position zueinander einnehmen zu können. Über den Rahmen 60 kann die Stanznietvorrichtung 10 beispielsweise an einem Arm wie in Figur 1 gezeigt befestigt sein.In FIG. 2 schematically a punch rivet 10 according to the invention is shown in a preferred embodiment. The punch riveting apparatus 10 has a frame 60, which is preferably in the form of a C-frame or C-bracket, on which the individual components are usually arranged in a punch riveting apparatus in order to be able to assume the desired position relative to one another. About the frame 60, the punch rivet 10, for example, on an arm as in FIG. 1 be shown attached.

Die Stanznietvorrichtung 10 weist einen Stempel 15 auf, beispielhaft mit einem runden Querschnitt. Der Stempel 15 ist von einem (hülsenförmigen) Niederhalter 16 radial umgeben und relativ zu diesem in Längsrichtung beweglich angeordnet. Der Niederhalter ist mittels einer Feder am Stempel 15 befestigt. Der Stempel 15 und der Niederhalter 16 bilden hierbei ein Fügewerkzeug 70. Weiterhin ist der Stempel 15 mit einem Antrieb 50 gekoppelt, der dazu dient, eine zum Eindrücken des Niets 20 in die beiden Bauteile 11, 12 benötigte Kraft F aufzubringen. Der Antrieb 50 kann beispielsweise mittels der Recheneinheit 80 gesteuert werden. Ebenfalls ist der Niederhalter 16 dazu eingerichtet, gegen die Oberfläche des dem Stempel 15 zugewandten Bauteils 11 mit einer Niederhaltekraft zu drücken.The punch riveting apparatus 10 has a punch 15, by way of example with a round cross section. The punch 15 is radially surrounded by a (sleeve-shaped) hold-down 16 and arranged movable relative to this in the longitudinal direction. The hold-down is fastened by means of a spring on the punch 15. The punch 15 and the hold-down 16 in this case form a joining tool 70. Furthermore, the punch 15 is coupled to a drive 50 which serves to apply a force F required to press the rivet 20 into the two components 11, 12. The drive 50 can be controlled, for example, by means of the computing unit 80. Also, the hold-down 16 is adapted to press against the surface of the die 15 facing member 11 with a hold-down force.

Auf der dem Stempel 15 und dem Niederhalter 16 gegenüberliegenden Seite der beiden Bauteile 11, 12 ist ein Gegenhalter in Form einer Matrize 18 angeordnet. Der Stempel 15 ist in vertikaler Richtung, wie auch der Niederhalter 16, beweglich angeordnet und relativ zu der Matrize 18 bewegbar. Der Niederhalter 16 und die Matrize 18 dienen dazu, die beiden Bauteile 11, 12 zwischen dem Niederhalter 16 und der Matrize 18 während der Bearbeitung durch den Stempel 15 einzuspannen bzw. zusammenzudrücken.On the stamp 15 and the hold-down 16 opposite side of the two components 11, 12, a counter-holder in the form of a die 18 is arranged. The stamp 15 is in the vertical direction, as well as the hold-16, movably arranged and relative to the die 18 movable. The hold-down 16 and the die 18 serve to clamp or compress the two components 11, 12 between the hold-down 16 and the die 18 during processing by the punch 15.

Der Niet 20, hier beispielhaft ein Halbhohlniet, besteht bevorzugt aus einem gegenüber den Werkstoffen der beiden Bauteile 11, 12 härteren Material, zumindest im Bereich eines Nietschafts. Die dem Bauteil 11 abgewandte, ebene Oberseite des Niets ist in Wirkverbindung mit dem Stempel 15 angeordnet, der an der Oberseite des Niets 20 flächig anliegt.The rivet 20, here by way of example a half-tubular rivet, preferably consists of a material which is harder than the materials of the two components 11, 12, at least in the region of a rivet shank. The component 11 facing away from the flat top of the rivet is arranged in operative connection with the punch 15, which rests flat against the top of the rivet 20.

Der Stempel 15 ist mit einem (mechanischen) Schwingungskonverter 30, der über einen Schwingungserzeuger 32, insbesondere einen Ultraschallgenerator, zur Erzeugung von Schwingungen bzw. Vibrationen anregbar ist, verbunden. Insbesondere werden dabei Ultraschallschwingungen mit einer Schwingweite (Abstand zwischen maximaler positiver und negativer Amplitude einer Schwingung) zwischen 10 µm und 110 µm (entspricht einer Amplitude von 5 µm bis 55 µm) und einer Frequenz zwischen 15 kHz und 35 kHz oder ggf. auch höher erzeugt. Diese Schwingungen werden von dem Schwingungskonverter 30 über einen Booster 31 und den Stempel 15, der auch als Sonotrode dient, in den Niet 20 eingekoppelt. das Fügewerkzeug 70, der Booster 31 sowie der Schwingungskonverter 30 bilden hierbei eine Setzeinheit 71.The punch 15 is connected to a (mechanical) vibration converter 30, which can be excited via a vibration generator 32, in particular an ultrasonic generator, for generating vibrations. In particular, ultrasonic vibrations with an amplitude (distance between the maximum positive and negative amplitude of a vibration) between 10 .mu.m and 110 .mu.m (corresponding to an amplitude of 5 .mu.m to 55 .mu.m) and a frequency between 15 kHz and 35 kHz or possibly higher generated , These vibrations are coupled from the vibration converter 30 via a booster 31 and the punch 15, which also serves as a sonotrode, in the rivet 20. the joining tool 70, the booster 31 and the oscillation converter 30 form a setting unit 71.

Bei dem Antrieb 50 kann es sich beispielsweise um einen Antrieb mit Kugel-, Rollen- oder Planetengewindetrieb oder dergleichen handeln, der dazu geeignet ist, eine Kraft F zum Eindrücken des Niets 20 in die Bauteile 11, 12 aufzubringen. An dem Antrieb 50 sind der Booster 31 und darüber der Schwingungskonverter 32 mit der Stempel 15 und der Niederhalter 16 mittels einer Haltevorrichtung 35 angebracht.The drive 50 can be, for example, a drive with ball, roller or planetary screw drive or the like, which is suitable for applying a force F for pressing in the rivet 20 into the components 11, 12. On the drive 50, the booster 31 and above the vibration converter 32 with the punch 15 and the hold-16 are mounted by means of a holding device 35.

Zwischen dem Gegenhalter 18 und dem Rahmen 60 sind ein Dämpfungsmaterial 61 sowie ein (optionaler) Materialblock 62 zur Schwingungsdämpfung vorgesehen, welche nun in Bezug auf Figur 3 näher erläutert werden sollen. Der Gegenhalter 18, der hier in Form einer Matrize ausgebildet ist, ist auf bzw. in dem Materialblock 62 befestigt. Hierzu wird vorliegend beispielsweise ein Zapfen am unteren Ende des Gegenhalters 18 in dem Materialblock 62 eingebracht. Es versteht sich, dass alternativ oder zusätzlich andere Befestigungsmittel verwendet werden können.Between the anvil 18 and the frame 60 there are provided a damping material 61 as well as an (optional) material block 62 for vibration damping, which will now be described with reference to FIGS FIG. 3 be explained in more detail. The counter-holder 18, which is designed here in the form of a die, is fastened on or in the material block 62. For this purpose, in the present case, for example, a pin at the lower end of the counter-holder 18 in the material block 62nd brought in. It is understood that alternatively or additionally, other fastening means may be used.

Der Materialblock 62 weist eine deutlich größere Masse als der Gegenhalter 18 auf, wodurch bereits ein großer Teil der Schwingungen, die beim Eindrücken des Niets vom Fügewerkzeug 70 über die Bauteile auf dem Gegenhalter übertragen werden, aufgenommen wird.The block of material 62 has a significantly greater mass than the counter-holder 18, whereby a large part of the vibrations, which are transmitted by the joining tool 70 via the components on the anvil when the rivet is pressed in, are already absorbed.

Der Materialblock 62 wiederum ist auf einem Dämpfungsmaterial 61 angebracht, welches wiederum auf dem Rahmen 60 angebracht ist. Damit bildet das Dämpfungsmaterial 61 eine Art Zwischenschicht zwischen dem Materialblock 62 und dem Rahmen 60. Die Anbringung des Materialblocks 62 auf dem Dämpfungsmaterial 61 kann, ebenso wie diejenige des Dämpfungsmaterials 61 auf dem Rahmen 60, beispielsweise durch Kleben oder andere geeignete Befestigungsarten erfolgen.The block of material 62, in turn, is mounted on a damping material 61, which in turn is mounted on the frame 60. Thus, the damping material 61 forms a kind of intermediate layer between the material block 62 and the frame 60. The attachment of the material block 62 on the damping material 61, as well as that of the damping material 61 on the frame 60, for example, by gluing or other suitable fastening methods.

Durch geeignete Wahl des Dämpfungsmaterials, beispielsweise ein Polymer, insbesondere ein technisches Thermoplast, mit geeigneten Werten für den Elastizitätsmodul sowie die Festigkeit und insbesondere einer Eigenfrequenz, die deutlich geringer ist als die Erregerfrequenz des Schwingungserzeugers, kann eine weitere Entkopplung des Gegenhalters 18 vom Rahmen 60 hinsichtlich einer Schwingungsübertragung erfolgen. Eine Anregung des Dämpfungsmaterials zu Schwingungen ist durch die geringe Eigenfrequenz kaum möglich, wodurch die Entkopplung erreicht wird.By suitable choice of the damping material, for example a polymer, in particular a technical thermoplastic, with suitable values for the modulus of elasticity and strength and in particular a natural frequency which is significantly lower than the excitation frequency of the vibrator, further decoupling of the counter-holder 18 from the frame 60 in terms a vibration transmission take place. An excitation of the damping material to vibrations is hardly possible due to the low natural frequency, whereby the decoupling is achieved.

Es sei angemerkt, dass der Materialblock 62 auch weggelassen werden kann, wobei dann der Gegenhalter 18 auf geeignete Weise an dem Dämpfungsmaterial 61 zu befestigen ist.It should be noted that the block of material 62 may also be omitted, in which case the counter-holder 18 is suitably secured to the cushioning material 61.

Claims (9)

  1. Punch-riveting device (10) for connecting at least two components (11, 12) by means of a rivet (20), comprising a frame (60) on which a joining tool (70) and a dolly (18) are arranged in such a way that the at least two components (11, 12) can be arranged between the joining tool (70) and the dolly (18) during the pressing in of the rivet (20) by means of the joining tool (70), and comprising a vibration generator (32) which is designed, during at least one operating phase, upon pressing in, to set in vibration at least one part (11, 12, 15, 18, 20) involved in the pressing in of the rivet (20) into the at least two components (11, 12),
    wherein a damping material (61) for damping vibrations is provided between at least one of the parts (15, 18) involved in the pressing in of the rivet (20) into the at least two components (11, 12) and arranged on the frame (60) and the frame (60), characterized in that the damping material (61) has a modulus of elasticity of at least 5000 MPa and comprises a polymer.
  2. Punch-riveting device (10) according to Claim 1, wherein the damping material (61) has a natural frequency which is less than an excitation frequency of the vibration generator (32).
  3. Punch-riveting device (10) according to Claim 2, wherein the natural frequency of the damping material (61) is at most a half, preferably at most a fifth, more preferably at most a tenth, of the excitation frequency of the vibration generator (32) .
  4. Punch-riveting device (10) according to one of the preceding claims, wherein the at least one of the parts involved in the pressing in of the rivet (20) into the at least two components (11, 12) and arranged on the frame (60), between which part and the frame (60) the damping material (61) is provided, comprises the dolly (18).
  5. Punch-riveting device (10) according to Claim 4, wherein a material block (62) is provided between the dolly (18) and the damping material (61).
  6. Punch-riveting device (10) according to Claim 5, wherein a mass of the material block (62) is more than the mass of the dolly (18), preferably at least ten times, more preferably at least a hundred times, the mass of the dolly (18).
  7. Punch-riveting device (10) according to one of the preceding claims, wherein the damping material (61) has a strength of at least 20 MPa.
  8. Punch-riveting device (10) according to one of the preceding claims, wherein the damping material (61) comprises an engineering thermoplastic.
  9. Production apparatus (100) having a punch-riveting device (10) according to one of the preceding claims.
EP18160619.5A 2017-03-29 2018-03-08 Self-piercing rivet setting device and production device Active EP3388165B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102017205264.3A DE102017205264A1 (en) 2017-03-29 2017-03-29 Punching riveting device and production device

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EP3388165A1 EP3388165A1 (en) 2018-10-17
EP3388165B1 true EP3388165B1 (en) 2019-09-11

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Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19729368A1 (en) * 1997-07-09 1999-01-14 Ortwin Hahn Device and method for mechanically joining sheets, profiles and / or multi-sheet connections
GB0813883D0 (en) 2008-07-30 2008-09-03 Henrob Ltd Joining apparatus and method
EP2754512B1 (en) * 2013-01-11 2015-09-16 Volkswagen Aktiengesellschaft Joining device and method for joining components without predrilled holes by means of a joining element which is subjected to pulsed forces
DE102013000387B4 (en) * 2013-01-11 2017-04-27 Volkswagen Aktiengesellschaft Joining device with C-shaped frame and yielding die for pre-punch-free joining of components by means of kraftimpulsbeaufschlagtem joining element, and die holder and handling device therefor
DE102015214014A1 (en) * 2015-07-24 2017-01-26 Robert Bosch Gmbh Punch riveting device and manufacturing device

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* Cited by examiner, † Cited by third party
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DE102017205264A1 (en) 2018-10-04

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