EP3117925B1 - Dispositif de rivetage et dispositif de fabrication - Google Patents

Dispositif de rivetage et dispositif de fabrication Download PDF

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Publication number
EP3117925B1
EP3117925B1 EP16172796.1A EP16172796A EP3117925B1 EP 3117925 B1 EP3117925 B1 EP 3117925B1 EP 16172796 A EP16172796 A EP 16172796A EP 3117925 B1 EP3117925 B1 EP 3117925B1
Authority
EP
European Patent Office
Prior art keywords
punch
riveting apparatus
punch riveting
rivet
hold
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
EP16172796.1A
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German (de)
English (en)
Other versions
EP3117925A1 (fr
Inventor
Sebastian Engler
Florian Woelke
Rainer Heinrich Hoerlein
Andreas Scharfenberg
Christian Diessner
Karl-Heinz Pfrommer
Ingo Kesel
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
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Robert Bosch GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP3117925A1 publication Critical patent/EP3117925A1/fr
Application granted granted Critical
Publication of EP3117925B1 publication Critical patent/EP3117925B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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.
  • Methods and devices for punch riveting serve for connecting at least two in a connection region in particular flat trained components (joint partners).
  • a punch riveting method is characterized in that a pre-punching of the components to be joined together is not required. Rather, a rivet is pressed by means of a punch or a punch tool in the at least two components, being ensured by a correspondingly shaped counter-holder, for example.
  • a die which cooperates with the punch tool, that the rivet in a certain way deformed within the components to be joined together to produce a positive and positive connection between the components while avoiding penetration of the component facing away from the rivet.
  • ultrasonic punch riveting methods or devices are known in which a vibration generator, such as.
  • An ultrasonic generator is used to enable one or more components in the connection of the components in vibration. By this vibration, for example, the expended force is reduced to push the rivet.
  • a punch riveting device serves for connecting at least two components and has a punch, a counter-holder, a holding-down device and a vibration generator.
  • the punch and the counter-holder are arranged to each other such that the at least two components between the punch and the counter-holder can be arranged and the punch is set into vibration by means of the vibration generator.
  • the hold-down surrounds the stamp at least partially and is adapted for pressing the at least two components to the counter-holder.
  • mutually facing surfaces of the punch and hold-down are spaced apart, so that the surfaces are formed as a boundary of a gap.
  • a so-called semi-tubular rivet and a so-called solid rivet can be used.
  • the punch can be in contact with the outside of it with the inside of the blank holder surrounding it.
  • the punch slides along the inside of the hold-down. Occurring frictional forces are negligible or at least acceptable.
  • the punch is set during the depression of the rivet in vibration, resulting in an additional, usually high-frequency, relative movement between the punch and the hold-down. The friction between punch and hold-down can lead, for example, to undesired signs of wear and / or cold welding. This can further result in a reduced tool life.
  • the gap is at least partially filled with a hydraulic fluid.
  • the stamp may be hydrostatically supported in the hold-down device, and more particularly, a circuit for the hydraulic fluid may be provided.
  • a corresponding pump may be provided for the circuit.
  • the gap should be limited especially at the other boundary surfaces that are not covered by the surfaces of stamp and hold-down. This is, for example, possible by the hold-down has a corresponding projection in the direction of the punch. A resulting, possible friction between the projection on the hold-down and the punch is usually negligible.
  • the projection may be formed of low friction material on the stamp.
  • such hydrostatic bearing also provides stability for the stamp, i.
  • the punch can be guided in the hold-down.
  • the hydraulic fluid can be exchanged and thus heat dissipated.
  • a cooling of the punch and the blank holder can be provided simultaneously.
  • the intermediate space is at least partially filled with a solid material, in particular with a low adhesion tendency, further in particular having plastic, ceramic and / or carbon.
  • a plastic for example, polytetrafluoroethylene (PTFE) can be used here.
  • the carbon may, for example, be present as a synthetic and / or natural diamond or diamond-like layer.
  • the material allows a stable guidance for the punch in the hold-down. By a suitable choice of material, the friction can also be kept low, in particular less than this would be the case between punch and hold-down, which are usually made of steel.
  • the solid material is designed as an exchangeable element, in particular as a sleeve, which surrounds the stamp at least partially and is in contact with both surfaces.
  • the punch riveting apparatus should then be designed so that the element remains in position during a riveting operation.
  • a projection may be formed on the element with which the element rests against the hold-down.
  • a projection may also be formed on the hold-down, on which the element rests. The ability to replace the element avoids a more expensive and costly replacement of the punch or blank if the material is worn. Such an element can be provided as a spare part.
  • a PTFE sleeve can, for example, a ceramic sleeve, for example. Al 2 O 3 , ZrO 2 , SiC or TiN, are used. It is also conceivable to use another wear-resistant, hard material which has been suitably treated on the surface, for example by grinding and / or mechanical and / or thermal polishing.
  • introduction means are provided which are adapted to introduce a lubricant into the intermediate space.
  • a lubricating film between the mutually facing surfaces are formed, which leads to a significant reduction in friction.
  • the distance between the facing surfaces should be very small, but greater than zero.
  • the introduction means can, for example, have one or more injection nozzles at a suitable point, which have a corresponding feed for the lubricant.
  • the lubricant has a lubricant, in particular based on graphite, wax and / or oil, or a release agent, in particular on a ceramic and / or polymeric basis. These are lubricants for the effective reduction of friction, which are also easily introduced.
  • the introduction means are further adapted to introduce the lubricant continuously or repeatedly, in particular at predetermined time intervals, in the intermediate space.
  • a continuous sliding or lubricating film can be formed between the facing surfaces.
  • viscous lubricants such as those based on wax
  • a repeated introduction may be sufficient.
  • the punch is replaceable directly or indirectly attached to the vibrator.
  • a stamp can be attached, for example, by screwing or plugging to the vibrator or a sonotrode coupled thereto.
  • a positioning device for a rivet that can be used with the punch riveting device is provided on an inner side of the hold-down device. This makes it very easy to hold a rivet in place for and during a riveting operation. This is particularly useful when the hold-down is spaced from the punch, since the hold-down then, depending on the diameter of the rivet, often can provide no guidance for the rivet. It is understood that such a positioning device should then be mounted at an appropriate height in order to support the rivet for as long as possible during the depression of the rivet in the components can.
  • the positioning device has a, in particular by means of spring force, centering device.
  • a, in particular by means of spring force, centering device In this way, an optimal position of the rivet can be achieved, since it is known that the rivet is exactly in the center of the hold-down, while it is not visible from the outside.
  • the vibration generator is designed as a sound generator, in particular as an ultrasound generator. This is a simple method for vibration generation.
  • a production device has a punch riveting device according to the invention.
  • FIG. 1 is simplified and schematically shown a manufacturing device 100 according to the invention in a preferred embodiment.
  • the production 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, a punch rivet 10 'according to the invention is arranged, which in the FIGS. 3a to 3d will be described in more detail.
  • a computing unit 80 is shown, which is, for example, a control unit for the punch riveting apparatus 10 '.
  • the arithmetic unit 80 can also as Control unit for the entire manufacturing facility, ie, 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, for example, current operating parameters of the punch riveting apparatus can be displayed.
  • FIGS. 2a to 2d a punch rivet 10 not according to the invention is shown at different stages of a punch riveting process.
  • the punch riveting apparatus 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 16 and arranged movable relative to this in the longitudinal direction.
  • the punch 15 is coupled to a drive, not shown here, for example a hydraulic or pneumatic drive, which serves to apply a force F required to press a rivet 20 into the two components 11, 12.
  • the hold-down 16 is adapted to press against the surface of the die 15 facing member 11 with a hold-down force.
  • a separate drive can be provided.
  • the hold-down can also be coupled to the drive of the punch 15, for example by means of a spring.
  • a counter-acting die 18 is arranged on the stamp 15 and the hold-down 16 opposite side of the two components 11, 12 .
  • the die 18 is also in the direction of a longitudinal axis 19, in the direction of which also the punch 15 and the hold-16 are arranged movable, raised and lowered.
  • 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 die 18 has, on the side facing the component 12, a planar upper side 21, from which, for example, a trough-shaped or recess 22 extends.
  • the rivet 20 here by way of example a half-tubular rivet, preferably consists of a material that is harder than the materials of the two components 11, 12, at least in the region of the rivet shank 24.
  • the flat top side facing away from the component 11 is arranged in operative connection with the ram 15. which rests flat on the upper side 26 of the rivet 20.
  • the top 26 of the rivet is a contact point 27 between the rivet and the punch.
  • the punch 15 is operatively connected to a vibration generator 30 for generating vibrations.
  • a vibration generator 30 for generating vibrations.
  • ultrasonic vibrations having an amplitude (distance between maximum positive and negative amplitude of a vibration) between 10 ⁇ m and 110 ⁇ m (or an amplitude between 5 ⁇ m and 55 ⁇ m) and a frequency between 15 kHz and 35 kHz are generated.
  • vibrations 15 are coupled by the vibrator 30 via the punch 15 in the rivet 20.
  • the coupling-in direction 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 (longitudinal) of the rivet 20 into the components 11, 12 or torsional (torsional vibration system).
  • the vibration generator 30 is connected to the computing unit 80, and can be controlled by the latter.
  • FIG. 2a Phase shown represents a beginning of the Stanzniethabilits in which the rivet shank 24 come into operative connection with the top of the component 11. In this case, the punch 15 is pressed with the force F against the stamp 15 facing member 11.
  • the rivet shank 24 initially cuts or punches into the component 11.
  • the two components 11, 12 are plastically deformed, wherein the recess 22 facing the component 12 is pressed in the corresponding areas in the recess 22.
  • FIG. 3a Now a punch rivet 10 'is shown.
  • the two surfaces 42 and 43 thus form a boundary of a space 45 having a volume. In this way, a friction between the punch 15 and the hold-down 16 'is avoided.
  • springs 41 are shown, by means of which the hold-down 16 'is fastened to a holder 40.
  • the holder 40 may be attached to the vibrator 30 or to a sonotrode (not shown) connected to the vibrator 30.
  • the punch 15 may be coupled to the vibrator 30.
  • the holder 40 is directly connected to a holder of the entire punch rivet 10 '.
  • a positioning device 55 is shown, which is arranged on the inside of the blank holder 16 'approximately at the level of the center of the rivet 20.
  • the positioning device 55 may, for example, be a plurality of springs, which are arranged at a uniform distance in a circular manner on the inside of the hold-down 16 '. In this respect, it may, for example, be a centering device.
  • the springs can also be introduced into blind holes in the hold-down device.
  • FIG. 3b a punch rivet 10 'is shown.
  • the space 45 between the surfaces 42 and 43 is filled with a hydraulic fluid 50.
  • suitable limitations for the hydraulic fluid 50 such as protrusions on the inside of the blank holder 16 ', may be provided.
  • openings 60 for example. Holes, provided in the hold-down 16 ', via which the gap 45 to a hydraulic circuit, eg. With a corresponding pump, can be connected and via which thus the hydraulic fluid 50 can be pumped through the gap 45.
  • a punch rivet 10 ' accordinging to the invention is shown. Opposite the in FIG. 3a As shown, a solid material 51 is introduced into the space 45 between the surfaces 42 and 43.
  • This material may, for example, be plastic, for example PTFE.
  • the solid material 51 is formed as an exchangeable element, for example a sleeve, which, as in FIG Figure 3c shown by means of a projection on the top of the hold-16 'rests.
  • Shaping means 61 are provided at the upper end of the blank holder 16 '.
  • These introduction means 61 may be, for example, nozzles or the like, which are introduced, for example, into a bore in the hold-down 16 '. However, it is also conceivable that such nozzles, for example.
  • a lubricant can be introduced into the intermediate space 45 between the surfaces 42 and 43. It is understood that the Einbringkar 61 for this purpose to a suitable supply of lubricant, for example. Via corresponding hoses, are connected. In a suitable embodiment, for example, continuously or at certain time intervals lubricant between the punch 15 and the hold-16 'are introduced, whereby a lubricant film in the space 45 is formed.
  • FIG. 3a shown positioning device 55 also in the forms according to the Figures 3b to 3d can be used or may be present.
  • a riveting operation by means of a punch rivet 10 ' such as in various forms in the FIGS. 3a to 3d shown to proceed as in the FIGS. 2a to 2d is shown and described with reference to a conventional punch riveting apparatus 10.

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

Claims (13)

  1. Dispositif de rivetage à l'emporte-pièce (10') destiné à relier au moins deux composants (11, 12) et comprenant un poinçon (15), un contre-support (18), un moyen de retenue (16') et un générateur de vibrations (30),
    le poinçon (15) et le contre-support (18) étant disposés l'un par rapport à l'autre de manière à ce que les au moins deux composants (11, 12) puissent être disposés entre le poinçon (15) et le contre-support (18),
    le poinçon (15) pouvant vibrer au moyen du générateur de vibrations (30),
    le moyen de retenue (16') entourant au moins partiellement le poinçon (15) et étant adapté pour presser les au moins deux composants (11, 12) contre le contre-support (18),
    des surfaces (42, 43), dirigées l'une vers l'autre, du poinçon (15) et du moyen de retenue (16') étant espacées de telle sorte que les surfaces (42, 43) soient conçues comme une limitation d'un espace intermédiaire (45),
    caractérisé en ce que l'espace intermédiaire (45) est au moins partiellement rempli d'un matériau solide (51), le matériau solide (51) étant conçu comme un élément échangeable entourant au moins partiellement le poinçon et étant en contact avec les deux surfaces.
  2. Dispositif de rivetage à l'emporte-pièce (10') selon la revendication 1, ledit espace intermédiaire (45) étant partiellement rempli d'un fluide hydraulique (50).
  3. Dispositif de rivetage à l'emporte-pièce (10') selon la revendication 2, le poinçon (15) étant monté de manière hydrostatique dans le moyen de retenue (16'), et un circuit étant notamment prévu pour le fluide hydraulique (50).
  4. Dispositif de rivetage à l'emporte-pièce (10') selon l'une des revendications précédentes, le matériau solide (51) étant un matériau à faible tendance à l'adhérence, comprenant notamment de la matière synthétique, de la céramique et/ou du carbone.
  5. Dispositif de rivetage à l'emporte-pièce (10') selon l'une des revendications précédentes, l'élément remplaçable étant conçu comme un manchon.
  6. Dispositif de rivetage à l'emporte-pièce (10') selon l'une des revendications précédentes, des moyens d'introduction (61) étant prévus, lesquels sont adaptés pour introduire un agent antifriction dans l'espace intermédiaire (45).
  7. Dispositif de rivetage à l'emporte-pièce (10') selon la revendication 6, l'agent antifriction comprenant un lubrifiant, en particulier à base de graphite, de cire et/ou d'huile, ou un agent de séparation, en particulier à base de céramique et/ou de polymère.
  8. Dispositif de rivetage à l'emporte-pièce à l'emporte-pièce (10') selon la revendication 6 ou 7, le moyen d'introduction (61) étant en outre adapté pour introduire l'agent antifriction dans l'espace intermédiaire (45) de manière continue ou répétée, en particulier à des intervalles de temps prédéterminés.
  9. Dispositif de rivetage à l'emporte-pièce (10') selon l'une des revendications précédentes, le poinçon (15) étant monté de manière interchangeable directement ou indirectement sur le générateur de vibrations (30).
  10. Dispositif de rivetage à l'emporte-pièce (10') selon l'une des revendications précédentes, un moyen de positionnement (55) d'un rivet (20) pouvant être utilisé avec le dispositif de rivetage à l'emporte-pièce (10) étant prévu sur un côté intérieur du moyen de retenue (16').
  11. Dispositif de rivetage à l'emporte-pièce (10') selon la revendication 10, le moyen de positionnement (55) comportant un moyen de centrage, fonctionnant notamment par la force d'un ressort.
  12. Dispositif de rivetage à l'emporte-pièce (10') selon l'une des revendications précédentes, le générateur de vibrations (30) étant conçu comme un générateur de sons, en particulier un générateur d'ultrasons.
  13. Moyen de fabrication (100) comprenant un dispositif de rivetage à l'emporte-pièce (10') selon l'une des revendications précédentes.
EP16172796.1A 2015-07-17 2016-06-03 Dispositif de rivetage et dispositif de fabrication Active EP3117925B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102015213438.5A DE102015213438A1 (de) 2015-07-17 2015-07-17 Stanznietvorrichtung und Fertigungsvorrichtung

Publications (2)

Publication Number Publication Date
EP3117925A1 EP3117925A1 (fr) 2017-01-18
EP3117925B1 true EP3117925B1 (fr) 2019-08-07

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EP16172796.1A Active EP3117925B1 (fr) 2015-07-17 2016-06-03 Dispositif de rivetage et dispositif de fabrication

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EP (1) EP3117925B1 (fr)
DE (1) DE102015213438A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
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RU199610U1 (ru) * 2020-01-14 2020-09-09 Федеральное государственное бюджетное образовательное учреждение высшего образования "Московский автомобильно-дорожный государственный технический университет (МАДИ)" Устройство для клёпки

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Publication number Priority date Publication date Assignee Title
DE102017205263A1 (de) * 2017-03-29 2018-10-04 Robert Bosch Gmbh Setzeinheit für eine Stanznietvorrichtung, Stanznietvorrichtung und Verfahren zum Betreiben einer Stanznietvorrichtung
CN114406174B (zh) * 2022-01-24 2022-11-29 深圳职业技术学院 一种自冲铆方法和自冲铆装置

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DE19718576A1 (de) * 1997-05-05 1998-11-12 Hahn Ortwin Vorrichtung und Verfahren für mechanische Fügetechniken
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RU199610U1 (ru) * 2020-01-14 2020-09-09 Федеральное государственное бюджетное образовательное учреждение высшего образования "Московский автомобильно-дорожный государственный технический университет (МАДИ)" Устройство для клёпки

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EP3117925A1 (fr) 2017-01-18
DE102015213438A1 (de) 2017-01-19

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