EP3381581B1 - Dispositif de poinçonnage et procédé de fonctionnement d'un dispositif de poinçonnage - Google Patents

Dispositif de poinçonnage et procédé de fonctionnement d'un dispositif de poinçonnage Download PDF

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Publication number
EP3381581B1
EP3381581B1 EP18160076.8A EP18160076A EP3381581B1 EP 3381581 B1 EP3381581 B1 EP 3381581B1 EP 18160076 A EP18160076 A EP 18160076A EP 3381581 B1 EP3381581 B1 EP 3381581B1
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EP
European Patent Office
Prior art keywords
rivet
punch
holding
holding device
setting unit
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
EP18160076.8A
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German (de)
English (en)
Other versions
EP3381581A1 (fr
Inventor
Florian Woelke
Armin Karle
Friedhelm Guenter
Steven Maul
Reiner Ramsayer
Christoph Kauth
Martin Dieterle
Andre Philipskoetter
Patrick Nickel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP3381581A1 publication Critical patent/EP3381581A1/fr
Application granted granted Critical
Publication of EP3381581B1 publication Critical patent/EP3381581B1/fr
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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
    • 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
    • B21J15/30—Particular elements, e.g. supports; Suspension equipment specially adapted for portable riveters
    • B21J15/32—Devices for inserting or holding rivets in position with or without feeding arrangements

Definitions

  • the present invention relates to a setting unit for a punch riveting device, a punch riveting device with such a setting unit, a production system with such a punch riveting device and a method for operating a punch riveting device.
  • Joining processes serve to connect at least two components (joining partners) that are particularly flat in a connection area.
  • a punch riveting process is characterized, for example, by the fact that pre-punching of the components to be connected to one another is not necessary. Rather, a rivet as a joining element is pressed into the at least two components by means of a joining tool that includes a punch, it being possible to ensure that the rivet or the rivet or the rivet can be secured by a correspondingly shaped counter-holder, for example in the form of a die, which interacts with the joining tool the components deform in a certain way in order to produce a non-positive and positive connection between the components.
  • EP 2 318 161 B1 a so-called ultrasonic self-piercing riveting process is known in which a vibration generator, such as an ultrasonic generator, is used to set one or more components vibrating when connecting the components. This oscillation reduces, for example, the force required to press in the rivet.
  • a vibration generator such as an ultrasonic generator
  • the invention is based on a setting unit which is provided for a punch riveting device or which is used with a punch riveting device.
  • a rivet can be held in the setting unit and it has a punch, by means of which the rivet can be subjected to force and introduced into at least one component in a riveting process.
  • One possibility of feeding and receiving in the case of self-piercing riveting devices, even with manual processing, is for example the use of a belt or the like in which several rivets are held in a predefined position and are arranged in a row. Such a strap can then be passed through the setting unit accordingly, so that, for example, a new rivet is placed in front of the punch after each riveting process.
  • Belt tracking can be coupled with the movement of the setting unit, for example, or it can also be performed separately.
  • Rivets can be guided in a predefined orientation in such a profile hose.
  • the profile hose can then be connected to a suitable point in the setting unit, so that a rivet can be supplied in the desired position or inserted into the setting unit for a riveting process.
  • the joining tool After the rivet has been inserted into the setting unit, it is usually necessary to hold the rivet in the setting unit until the rivet touches a component during the subsequent riveting process.
  • the joining tool usually has a So-called hold-down device, which surrounds the punch and is used to guide the rivet during the riveting process.
  • the hold-down device usually touches the component, while the punch is moved relative to the hold-down device in order to press the rivet into the component.
  • a holding device be provided for the setting unit, which can be brought into a starting position and into a holding position in which the rivet can be fixed by means of the holding device by actuating the holding device.
  • the holding device is designed in such a way that the rivet can be gripped by means of the holding device by moving it from the starting position into the holding position, and that the holding device can be released from the rivet by moving it from the holding position to the starting position is.
  • the ultrasonic self-piercing riveting device has a vibration generator for generating vibrations that can be coupled to the punch, in which case there is no longer any contact between the holding device and the rivet or the punch (or the sonotrode) when the punch hits the rivet touched.
  • the holding device is mechanically coupled to the punch in such a way that the holding device can be brought into the holding position and / or into the starting position by moving the punch and / or when the punch reaches a predetermined position.
  • a suitable linkage or the like can be provided for this purpose. Guides along suitable contours or the like are also conceivable.
  • the holding device can have at least one spring element for this purpose, which can be actuated by the movement of the plunger and / or when the respective predetermined position of the plunger is reached, in order to bring the holding device into the holding position and / or into the starting position.
  • Such a mechanical coupling enables a low-maintenance holding device.
  • the setting unit also has a hold-down device which at least partially surrounds the punch.
  • the hold-down device can, for example, have suitable recesses for the passage of parts of the holding device in order to bring them up to the rivet.
  • the invention also relates to a production system with such a punch riveting device and a method for operating a punch riveting device with such a setting unit.
  • the rivet is gripped by means of a holding device and then fixed.
  • the setting unit is then moved in the direction of the at least one component, with the holding device being released from the rivet after the rivet touches one of the components.
  • the rivet is then subjected to force by means of the punch and pressed into the at least one component.
  • a punch riveting device is used in the proposed method, the holding device then being brought from the starting position into the holding position in order to grip the rivet, and the holding device being brought into the starting position in order to remove it from the rivet to solve, especially before the (vibrating) punch touches the rivet or before the punch begins to vibrate.
  • the holding device it would also be possible to fix the rivet after releasing the holding device by means of the punch, which presses the rivet against the component.
  • FIG. 1 a conventional punch riveting device 10 'is shown schematically.
  • the punch riveting device 10 ' has a frame 60, which is preferably in the form of a C-frame or C-bracket, on which the individual components in a punch riveting device are usually arranged around the desired position relative to one another to be able to take. Via the frame 60, the punch riveting device 10 'can be attached, for example, to an arm for movement in space.
  • the punch riveting device 10 has a punch 15, for example with a round cross section.
  • the punch 15 is surrounded radially by a (sleeve-shaped) hold-down device 16 and is arranged to be movable relative to it in the longitudinal direction.
  • the punch 15 and the hold-down 16 together form a joining tool 70 '.
  • the punch 15 is coupled to a drive 50 which is used 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 95.
  • the drive 50 can, for example, be a drive with a ball, roller or planetary screw drive or the like, which is suitable for applying a force F for pressing a rivet 20 as a joining element into the components 11, 12.
  • the hold-down device 16 is also set up to press against the surface of the component 11 facing the punch 15 with a hold-down force.
  • a separate drive can be provided for this purpose, for example.
  • the hold-down device can also (as shown here) be coupled to the drive of the punch or to the punch itself, for example by means of a spring.
  • a counterholder in the form of a die 18 is arranged on the side of the two components 11, 12 opposite the punch 15 and the hold-down device 16.
  • the punch 15 and the die 18 are arranged to be movable in the vertical direction, as is the hold-down device 16, and are movable relative to one another.
  • 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 semi-tubular rivet, preferably consists of a material that is harder than the materials of the two components 11, 12, at least in the area of a rivet shank.
  • the flat upper side of the rivet facing away from the component 11 is arranged in operative connection with the punch 15, which rests flat against the upper side of the rivet 20.
  • a profile hose 17 is attached to the hold-down device 16, which is used to feed the rivets. Rivets can be individually inserted into the joining tool 70 via the profile hose, so that a new rivet is available for each new riveting process.
  • FIG 2 various possibilities are shown of how the rivet 20 can be held in the setting unit 70 'or the hold-down device 16'.
  • the inside of the hold-down device 16 ' is provided, for example, with fibers 40 which are directed downwards.
  • the rivet 20 can be held in this way on the one hand, but on the other hand it can also be pressed down slightly by the punch and guided in the process.
  • the inside of the hold-down device 16 ' is provided with downwardly directed supports 41 which are mounted by means of springs.
  • the rivet 20 can be held in this way on the one hand, but on the other hand it can also be pressed down slightly by the punch.
  • a rivet slide 42 is provided on one side of the hold-down device 16 ', via which the rivet is pressed laterally into the hold-down device.
  • the rivet 20 can be held in this way on the one hand, but on the other hand it can also be pressed down slightly by the punch.
  • the inside of the hold-down device 16 ' is provided with embedded balls 43 which are made, for example, of elastomers or polymeric material.
  • the rivet 20 can be held in this way on the one hand, but on the other hand it can also be pressed down slightly and guided by the punch.
  • an ultrasonic punch riveting device 10 according to the invention is shown schematically, which can also be used for a method according to the invention.
  • the basic structure of the ultrasonic self-piercing riveting device 10 corresponds to that of FIG Figure 1 conventional punch riveting device 10 'shown, in this respect reference is also made to the description there.
  • a vibration generator in the form of a vibration converter 30 with a signal generator 32 is provided, which together serve to generate ultrasound.
  • the ultrasonic punch riveting device 10 has a punch 15, which here also serves as a sonotrode, for example with a round cross section.
  • the punch 15 is surrounded radially by a (sleeve-shaped) hold-down device 16 and is arranged to be movable relative to it in the longitudinal direction.
  • the hold-down device is preferably attached by means of a spring to a so-called zero amplitude passage of the ram, i.e. a position of the ram at which the oscillation amplitudes are zero or at least as low as possible.
  • 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 95.
  • the punch 15 is operatively connected to the vibration converter 30 via a so-called booster 31, so that the ultrasonic vibrations can be transmitted to the punch 15 and thus the rivet 20.
  • ultrasonic vibrations with an amplitude (distance between the maximum positive and negative amplitude of an oscillation) between 10 ⁇ m and 110 ⁇ m (corresponds to an amplitude of 5 ⁇ m to 55 ⁇ m) and a frequency between 15 kHz and 35 kHz or possibly higher are generated .
  • the signal generator 32 is connected to the computing unit 95 and can be controlled by it.
  • a frame 35 is attached to the drive 50, on which the vibration converter 30, the booster 31 and the punch or sonotrode 15 are arranged, the punch 15 and the holding-down device 16 attached to it forming a setting unit 70.
  • the setting unit 70 has a holding device 80, which is only shown roughly schematically here. For a detailed illustration and explanation of the holding device, refer to the Figures 5 and 6 referenced.
  • FIG 4 is simplified and shown schematically a production system 100 according to the invention in a preferred embodiment.
  • the production plant can be, for example, an industrial robot, for example for an automobile body shop.
  • the production plant 100 has a support structure 3 arranged on a floor and two movable arms 4 and 5 arranged thereon, connected to one another. At the end of the arm 5 is an ultrasonic self-piercing riveting device 10, such as that shown in FIG Figure 3 is shown in more detail, arranged.
  • a storage container 110 for example a magazine, is provided in which rivets can be kept.
  • the ultrasonic punch riveting device 10 can then, for example, be moved via the arms to the storage container 110 in order to remove a rivet from there.
  • a setting unit 70 according to the invention is shown schematically in an embodiment, on the basis of which a method according to the invention is to be explained.
  • the setting unit 70 can, for example, in the case of the in Figure 3 Find punch riveting device shown use.
  • the setting unit 70 has a holding device 80, which here in turn has holding elements 83 which are connected to the punch or the sonotrode 15 via springs 83.
  • the holding elements 83 can now be pressed in the direction of the rivet 20 by means of springs 84.
  • the holding elements 83 are guided here, for example, through suitable openings in the hold-down device 16.
  • the holding device 80 is in the holding position P H.
  • the setting unit 70 can now be guided in the direction of the components 11, 12 until the rivet 20 and the hold-down device 16 rest on one of the components, as shown in the illustration below.
  • the hold-down device 16 can be pressed against the component 11 by suitable springs when the punch 15 moves in the direction of the components.
  • the holding device 80 is thus in an initial position P A in which it does not touch either the rivet 20 or the hold-down device 16.
  • the riveting process in which the rivet 20 is subjected to force via the punch 15 and is pressed into the components 11, 12, can be carried out.
  • the setting unit can then be moved away from the components and, for example, to the in Figure 4 storage container 110 shown are guided to receive a new rivet.
  • the holding device can initially continue to be left in the starting position and then, as soon as it is suitably placed for the new rivet, it can be brought into the holding position.
  • the spring forces of the springs 82 and 84 should be suitably matched to one another in order to move the holding device 80 as desired when the punch 15 is in a desired position or movement. It should also be noted that the holding elements 83 are to be fastened in a suitable manner to the setting unit or possibly also to the punch riveting device.
  • a setting unit 71 is shown schematically, which is not part of the claimed invention.
  • the setting unit 71 can, for example, also be used in the in Figure 3 Find punch riveting device shown use.
  • the holding device 85 has electrical actuators 87 which can move the holding elements 88.
  • compressed air actuated actuators could also be used, for example.
  • These holding elements 88 can now be moved by suitable control of the actuators 87 such that the holding device 85 can be brought into a holding position P H and an initial position P A.
  • the setting unit 71 can, as was already the case with the setting unit 70 in relation to FIG Figure 5 explained to be used for a riveting process.
  • the actuators 87 and holding elements 88 are to be attached in a suitable manner to the setting unit or possibly also to the punch riveting device.

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

Claims (3)

  1. Dispositif de rivetage auto-perforant (10) comprenant une unité de placement (70, 71), unité de placement (70, 71) dans laquelle un rivet (20) peut être maintenu, et un poinçon (15) au moyen duquel le rivet (20) peut être soumis à une force (F) et introduit dans au moins un composant (11, 12) dans un processus de rivetage,
    l'unité de placement (70, 71) comportant un dispositif de maintien (16) qui entoure au moins partiellement le poinçon (15),
    le dispositif de rivetage auto-perforant (10) étant conçu comme un dispositif de rivetage auto-perforant à ultrasons comprenant un générateur de vibrations (30, 32) destiné à générer des vibrations qui peuvent être injectées par couplage dans le poinçon (15),
    caractérisé par un dispositif de retenue (80, 85) qui peut être amené, par actionnement du dispositif de retenue (80, 85), dans une position initiale (PA) et dans une position de retenue (PH) dans laquelle le rivet (20) peut être fixé au moyen du dispositif de retenue (80, 85),
    le dispositif de retenue (80, 85) étant conçu de telle sorte que le rivet (20) peut être saisi au moyen du dispositif de retenue (80, 85) par déplacement de la position initiale (PA) à la position de retenue (PH), et le dispositif de retenue (80, 85) peut être libéré du rivet (20) par déplacement de la position de retenue (PH) à la position initiale (PA),
    le dispositif de retenue (80, 85) étant conçu de telle sorte qu'il n'y ait plus de contact entre le dispositif de retenue et le rivet, entre le dispositif de retenue et le dispositif de maintien (16) et entre le dispositif de retenue et le poinçon dans la position initiale (PA), lorsque le poinçon touche le rivet, le dispositif de maintien (16) entourant et maintenant le rivet (20) en position, et
    le dispositif de retenue (85) comportant des éléments de retenue (83) qui sont reliés au poinçon par le biais de premiers ressorts (82), et des deuxièmes ressorts (84) étant prévus qui peuvent presser les éléments de retenue (82) en direction du rivet, le dispositif de retenue étant conçu de telle sorte que, lorsque le poinçon se déplace, une force est exercée par les premiers ressorts (82) sur les éléments de retenue (83) de sorte que, en raison des surfaces inclinées au niveau des éléments de retenue (83), ceux-ci soient écartés l'un de l'autre et éloignés du rivet (20) en s'opposant à la force de ressort des deuxièmes ressorts (84) de sorte que le dispositif de retenue (80) soit dans la position initiale (PA).
  2. Installation de fabrication (100) comprenant un dispositif de rivetage auto-perforant (10) selon la revendication 1.
  3. Procédé de fonctionnement d'un dispositif de rivetage auto-perforant (10) selon la revendication 1,
    le rivet (20) étant saisi au moyen d'un dispositif de retenue (80, 85) puis fixé,
    l'unité de placement (70, 71) étant ensuite déplacée en direction de l'au moins un composant (11, 12),
    une fois que le rivet (12) est en contact avec l'un des composants (11), le dispositif de retenue (80, 85) étant libéré du rivet (20), et
    le rivet (20) étant alors soumis à une force (F) au moyen du poinçon (15) et pressé dans l'au moins un composant (11, 12),
    le dispositif de retenue (80, 85) étant amené dans la position de retenue (PH) afin de saisir le rivet (20), et
    le dispositif de retenue (80, 85) étant amené dans la position initiale (PA) afin d'être libéré du rivet.
EP18160076.8A 2017-03-29 2018-03-06 Dispositif de poinçonnage et procédé de fonctionnement d'un dispositif de poinçonnage Active EP3381581B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102017205263.5A DE102017205263A1 (de) 2017-03-29 2017-03-29 Setzeinheit für eine Stanznietvorrichtung, Stanznietvorrichtung und Verfahren zum Betreiben einer Stanznietvorrichtung

Publications (2)

Publication Number Publication Date
EP3381581A1 EP3381581A1 (fr) 2018-10-03
EP3381581B1 true EP3381581B1 (fr) 2021-01-27

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Application Number Title Priority Date Filing Date
EP18160076.8A Active EP3381581B1 (fr) 2017-03-29 2018-03-06 Dispositif de poinçonnage et procédé de fonctionnement d'un dispositif de poinçonnage

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EP (1) EP3381581B1 (fr)
DE (1) DE102017205263A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019110011A1 (de) * 2019-04-16 2020-10-22 Böllhoff Verbindungstechnik GmbH Setzkopf, Blechpresse oder Setzgerät mit diesem Setzkopf sowie ein Fügeverfahren eines Fügeelements mit dem Setzkopf

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4429737A1 (de) * 1994-06-10 1995-12-14 Profil Verbindungstechnik Gmbh Setzkopf und Verfahren zum Betrieb desselben
EP0755749B2 (fr) * 1995-06-07 2006-06-07 PROFIL-Verbindungstechnik GmbH & Co. KG Dispositif de guidage et/ou de fixation pour éléments, particulièrement pour éléments de fixation
US6986450B2 (en) * 2003-04-30 2006-01-17 Henrob Limited Fastener insertion apparatus
DE10332124B4 (de) * 2003-07-15 2005-08-11 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Vorrichtung zum Verbinden von plattenförmigen Bauteilen mit variabler Fügetechnik
GB0813883D0 (en) 2008-07-30 2008-09-03 Henrob Ltd Joining apparatus and method
DE102014224600A1 (de) * 2014-12-02 2016-06-02 Robert Bosch Gmbh Stanznietzange mit Stanzniethaltevorrichtung
DE102015213438A1 (de) * 2015-07-17 2017-01-19 Robert Bosch Gmbh Stanznietvorrichtung und Fertigungsvorrichtung
DE102016202243A1 (de) * 2016-02-15 2017-08-17 Robert Bosch Gmbh Stanznietvorrichtung und stanznietverfahren zum stanznieten mit ultraschall

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

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EP3381581A1 (fr) 2018-10-03

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