EP3552730A1 - Dispositif rivet auto-poinçonneur - Google Patents

Dispositif rivet auto-poinçonneur Download PDF

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Publication number
EP3552730A1
EP3552730A1 EP19160713.4A EP19160713A EP3552730A1 EP 3552730 A1 EP3552730 A1 EP 3552730A1 EP 19160713 A EP19160713 A EP 19160713A EP 3552730 A1 EP3552730 A1 EP 3552730A1
Authority
EP
European Patent Office
Prior art keywords
drive
punch
oscillating system
joining direction
component
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.)
Granted
Application number
EP19160713.4A
Other languages
German (de)
English (en)
Other versions
EP3552730B1 (fr
Inventor
Florian Woelke
Moritz Pohler
Reiner Ramsayer
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
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 EP3552730A1 publication Critical patent/EP3552730A1/fr
Application granted granted Critical
Publication of EP3552730B1 publication Critical patent/EP3552730B1/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
    • B21J15/10—Riveting machines
    • B21J15/16—Drives for riveting machines; Transmission means therefor
    • 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
    • B21J15/28—Control devices specially adapted to riveting machines not restricted to one of the preceding subgroups

Definitions

  • the present invention relates to a punch riveting device with a vibrating system, in particular a so-called ultrasonic punch riveting device.
  • Methods and devices for punch riveting serve for connecting at least two in a connecting region in particular flat trained components.
  • 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, which is ensured by a correspondingly shaped counter-holder, for example in the form of a die, which cooperates with the punch tool, that the rivet in a certain manner within deformed the components to be joined together to produce a positive and positive connection between the components while avoiding penetration of the rivet facing away from the component.
  • a punch riveting apparatus is known.
  • the invention is based on a punch riveting device for connecting at least two components by means of a rivet, with a punch and a counter-holder, between which the at least two components and the rivet can be arranged.
  • the punch riveting on a vibrating system, which in turn has the punch and a vibration converter which is so coupled or coupled to a vibration generator that the vibrating system can be excited to vibrate.
  • the oscillation converter can be designed, for example, as an electro-mechanical converter, in particular as a piezo converter, and can be connected or coupled directly or indirectly via a so-called booster (or amplitude amplifier) to the stamp, which then also serves as a thankrode.
  • the vibration generator can in particular be a frequency or sound generator, in particular an ultrasonic generator, in each case preferably also in the form of a function generator which supplies the vibration converter with a suitable signal, so that it is excited accordingly to oscillate.
  • the punch riveting apparatus further comprises a drive, by means of which the oscillating system and thus the punch can be acted upon by a force and movable in a joining direction to a arranged between the punch and a stamp facing component of at least two components arranged rivet by means of the punch in the at least push in two components.
  • a drive and guide unit for guiding the oscillating system in the joining direction, which has the drive and is arranged on a frame of the punch riveting device. It is thus formed a combined unit for the drive and the leadership of the vibration system.
  • This drive and guide unit or a component thereof encloses the oscillating system in a section extending in the joining direction, or else the drive and guide unit has a first component on which the oscillating system is arranged centrally with respect to the joining direction and the one second component of the drive and guide unit encloses in a joining direction extending portion.
  • both variants can be used.
  • the drive and guide unit has a guide device for guiding the oscillating system, which surrounds the oscillating system in the section extending in the joining direction as a part or a component of the drive and guide unit.
  • the guide device is in particular a separately formed from the drive component.
  • This guide device can also be in particular that part of the drive and guide unit which is arranged on the frame.
  • a particularly stable guidance of the vibration system is possible, since this is surrounded directly by the guide device.
  • the guide device can then be provided, for example, still suitable bearings such as roller, ball or sliding bearings.
  • this can then be performed directly or by means of a holder in the guide device.
  • a simpler adaptation of the oscillating system to the guide device in particular with regard to the geometry, which can often be very specific for the oscillating system, can be achieved.
  • the guide device may be formed in particular tubular with a round or rectangular cross-section.
  • a particularly stable guide device is made possible, but on the other hand, a particularly simple production.
  • the drive is arranged on the frame and coupled by means of a lever to the oscillating system.
  • a lever may in particular be coupled between a pivot point on which the lever is rotatably mounted on the frame, and a point of application of the drive on the lever with the oscillating system, for example via a joint.
  • the lever is coupled via the holder, if present, to the oscillating system.
  • the drive is integrated in the guide device, and in particular is designed as a linear drive. This allows a particularly compact punch riveting device.
  • the drive is designed as a hydraulic drive with a cylinder and a piston, wherein the piston then forms the mentioned first component to which the oscillating system is centrally located with respect to the joining direction, and the cylinder then forms the second component which encloses (as part of the drive and guide means) the first component in the joining direction extending portion.
  • the drive is designed as a hydraulic drive with a cylinder and a piston, wherein the piston then forms the mentioned first component to which the oscillating system is centrally located with respect to the joining direction, and the cylinder then forms the second component which encloses (as part of the drive and guide means) the first component in the joining direction extending portion.
  • FIG. 1 is simplified and shown schematically a manufacturing device 100.
  • 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.
  • a punch riveting device 200 is arranged in a preferred embodiment, which is shown here only schematically and will be described in more detail below.
  • a computing unit 80 is shown, which is, for example, a control unit of the punch riveting apparatus 200.
  • 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, for example, current operating parameters of the punch riveting apparatus can be displayed.
  • the element 90 may also be a combined display / input means, e.g. a touchscreen, act.
  • FIG. 2 schematically a non-inventive punch riveting apparatus 10 is shown, at which a problem to be solved, which is achieved with the present invention.
  • 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 in order to take the desired position to each other.
  • the punch rivet 10 for example, on an arm as in FIG. 1 be shown attached.
  • the punch riveting apparatus 10 has a punch (or sonotrode) 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 device is preferably fastened to a so-called zero-amplitude passage of the punch, ie a position of the punch at which oscillation amplitudes are zero or at least as low as possible, by means of a spring.
  • the punch 15 is coupled to a drive 50, which serves to apply a force F in the joining direction R required for pressing in a rivet 20 into the two components 11, 12.
  • the drive 50 can be controlled for example by means of the arithmetic unit 80.
  • the force F can be predetermined, for example, via a desired value and recorded as an actual value.
  • 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 may also be coupled (as shown here) to the drive of the punch or to the punch itself, for example by means of a spring.
  • 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 punch 15 and the die 18 are in the vertical direction, as well as the hold-16, arranged and movable relative to each other, wherein the die 18 itself is not movable in the rule.
  • 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-hollow punch 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 operatively connected to an (electro-mechanical) vibration converter 30, for example a piezo-converter.
  • the oscillation converter 30 in turn is connected to an (electric) oscillation generator 32, for example an ultrasonic generator. In this way, vibrations or vibrations can be generated and coupled to the stamp and thus the rivet.
  • the vibration generator 32 and the vibration converter 30 ultrasonic vibrations with a vibration amplitude (distance between maximum positive and negative amplitude of a vibration, in particular measured at the interface between the punch and rivet) between 10 .mu.m and 110 .mu.m (corresponding to an amplitude of 5 .mu.m to 55 ⁇ m) and a frequency between 15 kHz and 35 kHz or possibly higher.
  • the oscillator 32 is connected to the arithmetic unit 80 (or may also be part of the arithmetic unit) and can be controlled by it.
  • the drive 50 can be, for example, a ball, roller, planetary thread or threaded roller screw drive or the like which is suitable for applying a force F for pressing in the rivet 20 into the components 11, 12.
  • a holding device 35 for example in the form of a frame or a frame attached.
  • a vibration system 39 which in the present case comprises the oscillation converter 30, a booster (amplitude amplifier) 31 and the punch or the sonotrode 15 and the hold-down 16 is arranged.
  • the high-frequency longitudinal oscillation of the joining tool i. Sonotrode 15, booster 31 and vibration converter 30 come to a lateral migration or kinking or evasion of the joining tool.
  • Such lateral forces are in FIG. 2 exemplified by F Q. Moreover, in FIG. 2 the tilting of the joining tool or of the entire oscillating system 39 is also shown graphically. Such transverse forces are not known in previous, conventional punch riveting devices (without vibration or ultrasound support) in these magnitudes, since the joining tool is not subjected to high-frequency longitudinal vibrations.
  • FIGS. 3a to 6 are shown schematically punch riveting according to the invention in various preferred embodiments.
  • the basic components of these punch riveting apparatuses correspond to the components of the punch riveting apparatus 10 according to FIG. 2 and are provided in this respect with the same reference numerals. In this respect, reference is also made to the description there. The clarity, however, some components are not shown.
  • FIG. 3a schematically a punch rivet 200 according to the invention is shown in a preferred embodiment.
  • a drive and guide unit 70 is provided which has the drive 50 and a guide device 75 as components.
  • the guide device 75 here by way of example tubular with a round cross-section, is arranged on the frame. It is conceivable that the guide device is formed integrally with the frame, but the guide device 75 can also be attached to the frame in a suitable manner.
  • the oscillating system 39 is arranged in a holder 35, which is comparable to in FIG FIG. 2 can be shown bracket. Here, however, the oscillating system 39 is guided by means of the holder 35 in the guide device 75 and thus also in the drive and guide unit 70. This is done here by means of suitable bearings such as roller, ball or plain bearings.
  • the drive 50 in turn is arranged on the frame and has a lever 51, which is rotatably mounted, for example by means of a suitable joint to the guide means 75, and on the other hand to the holder 35 and thus to the oscillating system 39 is coupled.
  • the drive 50 is secured to the lever 51 accordingly.
  • the drive 50 can incidentally, ie in particular with regard to its operation, as with respect to FIG. 2 be explained explained.
  • the oscillating system 39 is therefore particularly stable in the joining direction R feasible and movable.
  • any resulting from lateral forces tilting or bending can be avoided or at least reduced.
  • the guide device 75 which can be configured in a particularly stable manner, as has already been explained in more detail above.
  • the punch riveting apparatus 200 is shown in plan view.
  • the round cross-section of the tubular guide device 75 with a central axis A can be seen here.
  • the holder 35, which carries the oscillating system 39 also has a round cross-section.
  • some or all parts of the oscillating system 39 may each have a round cross-section, preferably all with the same central axis A.
  • bearings with bearing elements 76, such as balls, which are distributed around the circumference, whereby a particularly uniform and thus stable leadership is achieved.
  • the oscillating system can possibly also be guided without the holder 35 in the guide device 75 or the drive and guide unit 70, especially since a guide device with a round cross section is used here.
  • FIG. 4a schematically a punch rivet 300 according to the invention is shown in a further preferred embodiment.
  • the drive 50 is integrated as part of the drive and guide unit 70 in the guide device 75 and thereby formed in particular as a linear drive.
  • FIG. 4b In particular, it can be seen that the cross-section of the tubular guide device 75 is rectangular, showing the punch riveting device 300 in a plan view. While the bearings 76 are arranged here on two opposite sides, components of the drive or linear drive 50 are respectively arranged on the other two sides. In this case, the uniform and stable guidance is achieved by an interaction of the bearings 76 with the drive 50 itself.
  • the oscillating system usually has a round cross section
  • the use of the holder 35 is expedient here.
  • the holder 35 which can then have a rectangular cross-section, the best possible guidance by the guide means 75 and thus the drive and guide unit 70 is possible.
  • FIG. 5 schematically a punch rivet 400 according to the invention is shown in a further preferred embodiment.
  • the drive and guide unit 70 here - in contrast to the punch riveting 200 and 300 - drive and guide structurally combined.
  • the drive 50 itself, which is designed here as a hydraulic drive and fastened or arranged on the frame 60, serves as a guide.
  • the drive 50 in this case has, in particular, a cylinder 52 with a piston 55 arranged movably therein. At the connections 53 and 54, the drive 50 can be supplied with a suitable hydraulic fluid.
  • the piston 55 in this case forms the component on which the oscillating system 39 is arranged centrically with respect to the joining direction R, ie the mentioned first component, and the cylinder 52 forms the second component of the drive and guide unit 70, the first component or surrounds the piston 55 in a extending in the joining direction section.
  • the oscillating system 39 can be fastened to the piston 55 in a suitable manner. Also conceivable here is the use of a suitable holder.
  • FIG. 6 schematically a punch rivet 500 according to the invention is shown in a further preferred embodiment.
  • the punch riveting apparatus 500 basically corresponds to the punch riveting apparatus 400 according to FIG. 5
  • a separately formed from the drive 50 guide means 75 is provided, which may be arranged on the frame 60.
  • the guide device 75 may be formed comparable to the guide means of the punch riveting device 200, but possibly adjusted in length in the joining direction R.
  • a holder for the oscillating system 39 for guidance in the guide device 75 may additionally be provided here, as in the case of the punch riveting device 200. It is also conceivable the simultaneous use of such a holder for guiding in the guide device 75 and for attachment to the piston 55th

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Presses And Accessory Devices Thereof (AREA)
EP19160713.4A 2018-04-12 2019-03-05 Dispositif rivet auto-poinçonneur Active EP3552730B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102018205531.9A DE102018205531A1 (de) 2018-04-12 2018-04-12 Stanznietvorrichtung

Publications (2)

Publication Number Publication Date
EP3552730A1 true EP3552730A1 (fr) 2019-10-16
EP3552730B1 EP3552730B1 (fr) 2021-01-27

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ID=65717746

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EP19160713.4A Active EP3552730B1 (fr) 2018-04-12 2019-03-05 Dispositif rivet auto-poinçonneur

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EP (1) EP3552730B1 (fr)
DE (1) DE102018205531A1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3483611A (en) * 1966-08-12 1969-12-16 Cavitron Corp Methods and apparatus for assembling parts together by ultrasonic energy
DE19905527A1 (de) * 1999-02-10 2000-08-17 Boellhoff Gmbh Vorrichtung zum Fügen von Werkstücken aus duktilem Material
EP2318161A1 (fr) 2008-07-30 2011-05-11 Henrob Limited Appareil et procédé d'assemblage
WO2015107351A1 (fr) 2014-01-16 2015-07-23 Henrob Limited Ensemble de montage
DE102014203357A1 (de) 2014-02-25 2015-08-27 Henkel Ag & Co. Kgaa Darreichungseinheit für eine Masse
DE102014224596A1 (de) 2014-12-02 2016-06-02 Robert Bosch Gmbh Stanznietzange mit Vibrationsunterstützung in X-Bauart
DE102016214534A1 (de) * 2016-08-05 2018-02-08 Robert Bosch Gmbh Stanznietvorrichtung und Fertigungsvorrichtung

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3483611A (en) * 1966-08-12 1969-12-16 Cavitron Corp Methods and apparatus for assembling parts together by ultrasonic energy
DE19905527A1 (de) * 1999-02-10 2000-08-17 Boellhoff Gmbh Vorrichtung zum Fügen von Werkstücken aus duktilem Material
EP2318161A1 (fr) 2008-07-30 2011-05-11 Henrob Limited Appareil et procédé d'assemblage
WO2015107351A1 (fr) 2014-01-16 2015-07-23 Henrob Limited Ensemble de montage
DE102014203357A1 (de) 2014-02-25 2015-08-27 Henkel Ag & Co. Kgaa Darreichungseinheit für eine Masse
DE102014224596A1 (de) 2014-12-02 2016-06-02 Robert Bosch Gmbh Stanznietzange mit Vibrationsunterstützung in X-Bauart
DE102016214534A1 (de) * 2016-08-05 2018-02-08 Robert Bosch Gmbh Stanznietvorrichtung und Fertigungsvorrichtung

Also Published As

Publication number Publication date
EP3552730B1 (fr) 2021-01-27
DE102018205531A1 (de) 2019-10-17

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