EP3120951B1 - Dispositif de rivetage et dispositif de fabrication - Google Patents

Dispositif de rivetage et dispositif de fabrication Download PDF

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Publication number
EP3120951B1
EP3120951B1 EP16172823.3A EP16172823A EP3120951B1 EP 3120951 B1 EP3120951 B1 EP 3120951B1 EP 16172823 A EP16172823 A EP 16172823A EP 3120951 B1 EP3120951 B1 EP 3120951B1
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EP
European Patent Office
Prior art keywords
punch
vibration
holding
hold
riveting device
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
EP16172823.3A
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German (de)
English (en)
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EP3120951A1 (fr
Inventor
Sebastian Engler
Florian Woelke
Rainer Heinrich Hoerlein
Andreas Scharfenberg
Christian Diessner
Karl-Heinz Pfrommer
Ingo Kesel
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Robert Bosch GmbH
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Robert Bosch GmbH
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Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP3120951A1 publication Critical patent/EP3120951A1/fr
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Publication of EP3120951B1 publication Critical patent/EP3120951B1/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

Definitions

  • the present invention relates to a punch riveting device for connecting at least two components and a manufacturing device with such a punch riveting device.
  • Methods and devices for punch riveting are used to connect at least two components (joining partners) that have just been formed in a connection area.
  • a punch riveting process is characterized in that it is not necessary to prepunch the components to be connected to one another. Rather, a rivet is pressed into the at least two components by means of a stamp or a stamping tool, whereby a correspondingly shaped counter-holder, for example in the form of a die, which interacts with the stamping tool, ensures that the rivet is fixed in a certain way deformed within the components to be connected to one another in order to produce a non-positive and positive connection between the components and at the same time to prevent penetration of the component facing away from the rivet.
  • a punch riveting device is used to connect at least two components and has a punch, a counter-holder, a hold-down device and a vibration generator.
  • the punch, the hold-down and the counter-holder are arranged in relation to one another in such a way that the at least two components can be arranged between the stamp and the counter-holder and at the same time between the hold-down and the counter-holder.
  • the stamp and the vibration generator are coupled to one another and form a vibration system and a drive is provided to which the stamp and the hold-down device are coupled such that a force can be exerted on the stamp and on the hold-down device in the direction of the components by means of the drive.
  • the hold-down device is coupled to the vibration system in such a way that an oscillation amplitude of the hold-down device in the contact area with one of the components has at most 25%, in particular at most 10%, of an oscillation amplitude of the punch in the contact area with a rivet.
  • the hold-down device is thus coupled to the vibration system in such a way that only the smallest possible, preferably no, vibration can be transmitted from the vibration system to the hold-down device.
  • the vibration amplitude of the hold-down device in the contact area with one of the components is preferably 0% (i.e., vibration node) of the vibration amplitude of the punch in the contact area with the rivet, or no vibration can be transmitted from the vibration system to the hold-down device. Both a so-called semi-hollow rivet and a so-called full rivet can be used as the rivet.
  • a drive can be provided in a simple manner, which at the same time exerts a force on the punch a rivet into the components and can exert a force on the hold-down device for pressing the components against the counter-holder.
  • the hold-down device can also be set in motion, whereby the desired pressing force on the components is reduced by the hold-down device. This can lead to poor riveting results or reduce the effect of vibration coupling or even completely hinder it.
  • a punch riveting device according to the invention manages with only one drive.
  • the hold-down device is suitably coupled to the vibration system formed by the vibration generator and punch, whereby the punch is set in vibration as desired, but the hold-down device is not.
  • a punch riveting device with only one drive can be provided, which is therefore simple and inexpensive.
  • the hold-down device is coupled to the oscillation system in a region of the oscillation system in which an oscillation amplitude of the oscillation system has at most 10%, in particular at most 5%, of the oscillation amplitude of the punch in the contact region with the rivet.
  • the hold-down device is coupled to the oscillation system in a region of the oscillation system in which an oscillation of the oscillation system has the smallest possible amplitude.
  • the oscillation amplitude of the oscillation system in this region is preferably 0% (ie oscillation node) of the oscillation amplitude of the punch in the contact region with the rivet.
  • Such an oscillation system generally also has a booster and / or a sonotrode, in particular also only one sonotrode, via which the stamp is coupled to the oscillation generator.
  • the stamp can also be designed as part of the sonotrode.
  • An oscillation is generated by the oscillation generator and the amplitude of the oscillation is translated via the booster. Depending on the geometrical design, the amplitude can be reduced, passed on consistently, but usually translated and therefore increased.
  • the sonotrode forms a resonance body, in which the amplitude is usually further increased.
  • a standing longitudinal vibration is formed in the vibration system. This standing vibration therefore also has points or ranges in which the amplitude is zero or at least almost zero.
  • a holding device is advantageously provided, which is fastened to the drive and to which the vibration system is fastened.
  • the holding device at least partially surrounds the vibration generator.
  • Such a holding device enables a particularly simple and space-saving arrangement of the vibration system in the punch riveting device.
  • the vibration system can also be largely decoupled from the drive with regard to vibration transmissions in this way.
  • both the vibration system and the hold-down device are attached to the holding device and via the holding device to the drive. This enables a power transmission from the drive to the punch and the hold-down device.
  • the separate attachment of the vibrating system and hold-down device to the holding device means that there is no direct contact between the vibrating system and holding-down device, but there is only indirect contact via the holding device, which can also be kept low with a suitable design of the holding device. In this way, vibration transmission from the vibration system to the hold-down device is largely avoided.
  • the oscillation system is also attached to the holding device in an area of the oscillation system in which an oscillation of the oscillation system has an amplitude that is as small as possible, in particular none, an oscillation transmission to the hold-down device is further reduced.
  • care can be taken to ensure that the vibration system is fastened to the holding device near the vibration generator or far from the stamp, since here an amplitude is generally significantly lower than in the region of the stamp.
  • the hold-down device is coupled to the vibration system in a region of the punch in which an oscillation amplitude of the vibration system has at most 10%, in particular at most 5%, of the vibration amplitude of the punch in the contact area of the rivet.
  • the hold-down device is coupled to the vibration system in a region of the plunger in which an oscillation of the vibration system has the smallest possible amplitude.
  • the oscillation amplitude of the oscillation system is preferably 0% (ie Vibration node) of the vibration amplitude of the punch in the contact area with the rivet. This is possible because, as a rule, an area also occurs in the stamp in which the standing vibration already mentioned has no or at least almost no amplitude. If the hold-down device is coupled here, the hold-down device can be made very compact because the punch is close to the components.
  • the hold-down device preferably has a spring unit, via which it is coupled to the vibration system.
  • the spring unit can have, for example, a cylindrical helical compression spring or plate springs or an elastomer spring.
  • a vibration or sound-absorbing coating such as a suitable lacquer can also be provided on the hold-down device, in particular in an area to which the hold-down device is coupled to the vibration system or other components.
  • a hold-down force can be adjusted while the rivet is being pressed in using a spring stiffness or a spring constant.
  • the spring constant can be selected appropriately so that hold-down forces between 2 kN and 8 kN are obtained, for example.
  • the spring constant for example, runs linearly in the case of a cylindrical helical compression spring, degressively in the case of disc springs or progressively in the case of pressure-loaded elastomer springs.
  • the spring unit advantageously has a damping material which is suitable for reducing an amplitude of the vibrations generated by the vibration generator at least to half.
  • the spring unit can be, for example, an elastomer spring, ie an elastic material that transmits the linear movement of the drive, but not the generally high-frequency vibration generated by the vibration generator.
  • a damping material for example an elastomer, can also be used in addition to a conventional spring.
  • the ultrasound generator is designed as a piezo converter. This is a simple method for generating vibrations.
  • the oscillation system expediently also has a booster and / or a sonotrode, via which the stamp is coupled to the oscillation generator.
  • the stamp is designed as part of the sonotrode. This is a common and easy-to-use arrangement for a vibration system for a punch riveting device.
  • the punch riveting device expediently also has a frame which has an interface for attaching the punch riveting device to a production device, such as an industrial robot. This enables a very simple assembly, for example, as part of an exchange.
  • a manufacturing device has a punch riveting device according to the invention.
  • FIG. 1 a simplified embodiment of a manufacturing device 100 according to the invention is shown in a preferred embodiment.
  • the manufacturing facility 100 can be, for example, an industrial robot in a manufacturing hall, for example, for an automobile body shop.
  • the production device 100 in this case has a support structure 3 arranged on a floor and two arms 4 and 5 which are arranged on it and are connected to one another and movable. At the end of the arm 5, a punch riveting device 10 'according to the invention is arranged, which in the Figures 3a to 3d is described in more detail.
  • a computing unit 80 is shown, which is, for example, a control unit for the punch riveting device 10 '.
  • the computing unit 80 can also act as a control unit for the entire production facility, i.e. In addition to the punch riveting device, it can also be provided for the control of the movable arms.
  • Display means 90 for example a display, are also provided, on which, for example, current operating parameters of the punch riveting device can be displayed.
  • the Punch riveting device 10 has a punch 15 which, for example, has a round cross section.
  • the punch 15 is radially surrounded by a sleeve-shaped hold-down device 16 and is arranged to be movable in the longitudinal direction relative to the latter.
  • the punch 15 is coupled to a drive (not shown here), for example a hydraulic or pneumatic drive, which is used to apply a force F required to press a rivet 20 into the two components 11, 12.
  • the hold-down device 16 is also designed to press against the surface of the component 11 facing the die 15 with a hold-down force.
  • a separate drive can be provided, for example.
  • the hold-down device can also be coupled to the drive of the plunger 15, for example by means of a spring.
  • a die 18 acting as a counter-holding device is arranged on the side of the two components 11, 12 opposite the punch 15 and the holding-down device 16, a die 18 acting as a counter-holding device is arranged.
  • the die 18 can also be raised and lowered in the direction of a longitudinal axis 19, in the direction of which the punch 15 and the hold-down device 16 are also arranged to be movable.
  • the hold-down device 16 and the die 18 serve to clamp or compress the two components 11, 12 between the hold-down device 16 and the die 18 during processing by the punch 15.
  • the die 18 has a flat upper side 21 on the side facing the component 12, from which a trough-shaped or cowl-shaped recess 22 extends.
  • the matrix recess can be flat, conical or spherical or a dome or. Have a thorn in the middle of the recess.
  • the flat top 26 facing away from the component 11 is arranged in operative connection with the punch 15 which lies flat against the top 26 of the rivet 20.
  • the top 26 of the rivet represents a contact point 27 between the rivet and the punch.
  • the stamp 15 is operatively connected to an oscillation generator 30 for generating oscillations or vibrations.
  • an oscillation generator 30 for generating oscillations or vibrations.
  • the vibration generator 30 ultrasonic vibrations with a vibration range (distance between the maximum positive and negative amplitude of a vibration) 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.
  • vibrations 15 are coupled into the rivet 20 by the vibration generator 30 via the punch 15.
  • the direction of coupling of the vibrations of the vibration generator 30 can take place, for example, parallel to the longitudinal axis 19, that is to say parallel to the joining direction of the rivet 20 into the components 11, 12.
  • the vibration generator 30 is connected to the computing unit 80 and can be controlled by the latter.
  • the phase shown represents a start of the punch riveting process, in which the rivet shaft 24 comes into operative connection with the upper side of the component 11.
  • the punch 15 is pressed with the force F against the component 11 facing the punch 15.
  • the stamp 15 is then moved upwards by the components 11, 12 in the opposite direction.
  • FIG 3 is shown schematically and simplified a punch riveting device without vibration generator. Compared to those in the Figures 2a to 2d The punch riveting device shown here shows the coupling of the hold-down device 16 to the punch 15.
  • the stamp 15 has a radial projection at the upper end shown here.
  • a spring unit 41 for example in the form of a cylindrical helical compression spring, is attached to this radial projection, via which the hold-down device 16 is coupled to the plunger 15.
  • FIG 4a A punch riveting device 10 'according to the invention is now shown in a preferred embodiment.
  • 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 generally arranged in order to be able to assume the desired position relative to one another.
  • the punch riveting device 10 ′ can, for example, on the Figure 1 arm 3 shown be attached. It goes without saying that even in the Figures 2a to 2d and 3 Punch riveting devices shown can usually be such a frame.
  • a drive 50 which can be, for example, a spindle drive or the like, which is suitable for applying a force F for pressing the rivet 20 into the components 11, 12.
  • a holding device 35 for example in the form of a frame or a frame, is attached to the drive 50.
  • An oscillation system 39 is arranged on the holding device 35, which in the present case has an oscillation generator 30, for example an ultrasound generator, a booster 31, a sonotrode 32 and a stamp 15.
  • the oscillation system 39 is arranged or fastened to the holding device 35 approximately in the middle of the booster 31, which has an upper, wider and a lower, narrower part.
  • the stamp 15 can, for example, be part of the sonotrode 32, i.e. that both components can form a structural unit.
  • the booster 31 is connected to the holding device 35, the booster 31 has no (i.e., vibration node) or only a small vibration amplitude in the region where it is connected to the holding device 35.
  • a hold-down device 16 ' is shown, which is coupled to the holding device 35 by means of a spring unit 41, for example in the form of a cylindrical helical compression spring.
  • the hold-down device 16 'is thus coupled to the holding device 35 separately from the oscillation system 39, i.e. the hold-down device 16 'is only indirectly coupled to the vibration system 39.
  • An oscillation of the oscillation system 39 is not, or at least only insignificantly, transmitted to the hold-down device 16 'by this type of coupling.
  • a diagram is shown on the right-hand side of the figure, in which a course of an oscillation amplitude A of an oscillation which forms in the oscillation system 39 is shown over the position ⁇ .
  • the area at which the vibration system 39 is coupled to the holding device 35 is a point of low vibration amplitude.
  • the oscillation amplitude is generally lower than in the lower region of the plunger 15. In this respect, a possibly nevertheless transmissible oscillation has hardly any effect on the hold-down device, since the oscillation amplitude would be very low.
  • FIG 4b A punch riveting device 10 'according to the invention is shown in a further preferred embodiment. Opposite the in Figure 4a Punch riveting device 10 'shown the hold-down device 16 'is not coupled to the holding device 35, but to the oscillation system 39 in the area of the plunger 15 or the sonotrode 32.
  • Such a suitable range with little or no vibration amplitude can be determined, for example, on the basis of the design of the vibration system 39 or by means of tests.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Automatic Assembly (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)

Claims (12)

  1. Dispositif de rivetage (10')destiné à assembler au moins deux éléments de construction (11, 12), comportant un poinçon (15), un contre-rivoir (18), un serre-flan (16') et un générateur de vibrations (30), dans lequel le poinçon (15), le serre-flan et le contre-rivoir (18) sont disposés les uns par rapport aux autres de sorte que les au moins deux éléments de construction (11, 12) puissent être disposés entre le poinçon (15) et le contre-rivoir (18) et, en même temps, entre le serre-flan (16') et le contre-rivoir (18), le poinçon (15) et le générateur de vibrations (30) étant couplés l'un avec l'autre et constituant un système vibratoire (39), un entraînement (50) étant prévu, auquel sont couplés le poinçon (15) et le serre-flan (16') de sorte que l'entraînement (50) puisse appliquer une force (F) sur le poinçon (15) et sur le serre-flan (16') en direction des éléments de construction (11, 12), caractérisé en ce que le générateur de vibrations (30) se présente sous la forme d'un générateur d'ultrasons, le serre-flan (16') étant couplé avec le système vibratoire (39) de sorte que, dans la région de contact avec l'un des éléments de construction, une amplitude vibratoire (A) du serre-flan (16') présente au plus 25 %, en particulier au plus 10 %, d'une amplitude vibratoire (A) du poinçon (15) dans la région de contact avec un rivet (20), le serre-flan (16') étant couplé avec le système vibratoire (39) dans une région du système vibratoire (39) où une amplitude vibratoire (A) du système vibratoire (39) présente au plus 10 %, en particulier au plus 5 %, de l'amplitude vibratoire (A) du poinçon (15) dans la région de contact avec le rivet (20).
  2. Dispositif de rivetage (10') selon la revendication 1, dans lequel est prévu un dispositif de retenue (35) fixé à l'entraînement (50) et auquel est fixé le système vibratoire (39).
  3. Dispositif de rivetage (10') selon la revendication 2, dans lequel le dispositif de retenue (35) entoure, au moins partiellement, le générateur de vibrations (30).
  4. Dispositif de rivetage (10') selon la revendication 2 ou 3, dans lequel le serre-flan (16') est fixé au dispositif de retenue (35) de manière séparée du système vibratoire (39).
  5. Dispositif de rivetage (10') selon l'une quelconque des revendications 1 à 4, dans lequel le serre-flan (16') est couplé avec le système vibratoire (39) dans une région du poinçon (15) dans laquelle une amplitude vibratoire (A) du système vibratoire (39) présente au plus 10 %, en particulier au plus 5 %, de l'amplitude vibratoire (A) du poinçon (15) dans la région de contact avec le rivet (20).
  6. Dispositif de rivetage (10') selon l'une quelconque des revendications précédentes, dans lequel le serre-flan (16') comporte une unité-ressort (41) par l'intermédiaire de laquelle il est couplé avec le système vibratoire (39) .
  7. Dispositif de rivetage (10') selon la revendication 6, dans lequel l'unité-ressort (41) comporte un matériau amortissant, en particulier un élastomère, apte à réduire d'au moins de moitié une amplitude des vibrations produites par le générateur de vibrations.
  8. Dispositif de rivetage (10') selon l'une quelconque des revendications précédentes, dans lequel le générateur de vibrations (30) est réalisé sous la forme d'un convertisseur piézoélectrique.
  9. Dispositif de rivetage (10') selon l'une quelconque des revendications précédentes, dans lequel le système vibratoire (39) comporte en outre un survolteur (31) et/ou une sonotrode (32) par l'intermédiaire desquels le poinçon (15) est couplé avec le générateur de vibrations (30) .
  10. Dispositif de rivetage (10') selon la revendication 9, dans lequel le poinçon (15) constitue une partie de la sonotrode (32).
  11. Dispositif de rivetage (10') selon l'une quelconque des revendications précédentes, comportant en outre un bâti (60) qui présente une interface permettant d'installer le dispositif de rivetage (10') sur un système de fabrication (100).
  12. Système de fabrication (100) comportant un dispositif de rivetage (10') selon l'une quelconque des revendications précédentes.
EP16172823.3A 2015-07-24 2016-06-03 Dispositif de rivetage et dispositif de fabrication Active EP3120951B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102015214014.8A DE102015214014A1 (de) 2015-07-24 2015-07-24 Stanznietvorrichtung und Fertigungsvorrichtung

Publications (2)

Publication Number Publication Date
EP3120951A1 EP3120951A1 (fr) 2017-01-25
EP3120951B1 true EP3120951B1 (fr) 2020-02-05

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EP16172823.3A Active EP3120951B1 (fr) 2015-07-24 2016-06-03 Dispositif de rivetage et dispositif de fabrication

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DE (1) DE102015214014A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017205264A1 (de) * 2017-03-29 2018-10-04 Robert Bosch Gmbh Stanznietvorrichtung und Fertigungseinrichtung
DE102017210458A1 (de) * 2017-06-22 2018-12-27 Robert Bosch Gmbh Stanznietvorrichtung mit Schwingungserzeuger
DE102018220897A1 (de) * 2017-12-12 2019-06-13 Robert Bosch Gmbh Setzeinheit für eine Stanznietvorrichtung, Stanznietvorrichtung und Verfahren zum Verbinden von Bauteilen
GB2570778B (en) * 2017-12-12 2022-12-14 Bosch Gmbh Robert Setting unit for a self-piercing rivet device, self-piercing rivet device and method for connecting component parts
DE102018200012A1 (de) * 2018-01-02 2019-07-04 Robert Bosch Gmbh Schwingsystem und Stanznietvorrichtung

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DE19729368A1 (de) * 1997-07-09 1999-01-14 Ortwin Hahn Vorrichtung und Verfahren zum mechanischen Fügen von Blechen, Profilen und/oder Mehrblechverbindungen
DE19905527B4 (de) * 1999-02-10 2006-11-23 Böllhoff GmbH Vorrichtung zum Fügen von Werkstücken aus duktilem Material
EP1108480A3 (fr) * 1999-12-09 2003-02-05 Hahn, Ortwin, Prof. Dr.-Ing. Dispositif et procede pour realiser un assemblage mecanique
DE10341716B4 (de) * 2003-03-25 2009-12-24 Forschungsgesellschaft Umformtechnik Mbh Vorrichtung zum radialen Umformen von stab-, rohr- oder drahtförmigen Werkstücken
GB0813883D0 (en) * 2008-07-30 2008-09-03 Henrob Ltd Joining apparatus and method
DE102014203357B4 (de) 2014-02-25 2016-11-03 Henkel Ag & Co. Kgaa Darreichungseinheit für eine Masse
DE102014203757B4 (de) * 2014-02-28 2022-03-31 Robert Bosch Gmbh Verfahren zum Verbinden wenigstens zweier Bauteile im Stanznietverfahren, Vorrichtung zum Durchführung des Verfahrens, Fertigungseinrichtung und Verwendung des Verfahrens

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EP3120951A1 (fr) 2017-01-25
DE102015214014A1 (de) 2017-01-26

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