EP3117924B1 - Procédé de liaison d'au moins deux composants au moyen d'un dispositif de rivetage et dispositif de fabrication - Google Patents

Procédé de liaison d'au moins deux composants au moyen d'un dispositif de rivetage et dispositif de fabrication Download PDF

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Publication number
EP3117924B1
EP3117924B1 EP16172785.4A EP16172785A EP3117924B1 EP 3117924 B1 EP3117924 B1 EP 3117924B1 EP 16172785 A EP16172785 A EP 16172785A EP 3117924 B1 EP3117924 B1 EP 3117924B1
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EP
European Patent Office
Prior art keywords
punch
rivet
power
component parts
profile
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EP16172785.4A
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German (de)
English (en)
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EP3117924A1 (fr
Inventor
Florian Woelke
Martin Dieterle
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Robert Bosch GmbH
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Robert Bosch GmbH
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Publication of EP3117924A1 publication Critical patent/EP3117924A1/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
    • B21J15/28—Control devices specially adapted to riveting machines not restricted to one of the preceding subgroups
    • B21J15/285—Control devices specially adapted to riveting machines not restricted to one of the preceding subgroups for controlling the rivet upset cycle

Definitions

  • the present invention relates to a method for connecting at least two components by means of a punch riveting device, as well as a production device with a punch riveting and a computing unit for performing the method.
  • Punching riveting methods are used to connect at least two components that are particularly flat in a connection region (joining partner).
  • 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.
  • Such methods are known from DE 10 2013 000 388 A1 or the EP 0 893 179 A2 known.
  • Ultrasonic punch riveting known, in which a vibration generator, such as.
  • An ultrasonic generator is used to enable one or more components when connecting the components in vibration. By this oscillation, for example, the force to be expended for pressing in the rivet is reduced,
  • a method according to the invention serves for connecting at least two components by means of a punch riveting device.
  • the at least two components are arranged between a punch and a counter-holder, a rivet arranged between the punch and a component of the at least two components arranged rivet is pressed by means of the punch in the at least two components by the punch is acted upon by a force and at least one component involved in pressing in the rivet is vibrated when pressed in by means of a vibration generator.
  • a profile of a power of the vibrator is determined during the indentation of the rivet.
  • a course of the performance in particular a temporal course and / or a local course can be determined, e.g. the power as a function of time and / or the power as a function of a position of the punch.
  • a so-called semi-tubular rivet and a so-called solid rivet can be used.
  • a force as a function of the position of the punch can be used for a quality evaluation of the punch riveting process.
  • it can be examined whether the force course moves within certain limit values, for example a so-called envelope curve.
  • a force curve can usually no longer be used so easily for a quality evaluation, since the force on the stamp oscillates due to the oscillation.
  • the force curve can oscillate more or less strongly. This avoids a quality assessment necessary for many applications in industry, since the commonly used limit values are not meaningful here.
  • the course of the performance is preferably displayed on display means, in particular graphically.
  • This may preferably be, for example, a display on which the course is displayed graphically. This allows a particularly simple and clear representation of the course, for example, for an operator of the punch riveting device, which can thus assess the riveting process very quickly.
  • the course of the power is associated with an associated punch riveting process and stored on a storage medium.
  • the course of the power is used for a quality evaluation of an associated stamped riveting operation and / or a connection of the at least two components produced in this stamped riveting operation.
  • simple quality assessment is possible by determining the course of performance.
  • Such a quality assessment can, for example, also be carried out at least partially automatically, for example
  • the punch riveter operator is automatically alerted when a bad or faulty rivet connection has been generated.
  • the power of the vibration generator is compared with limit values which are specified in particular as a function of the at least two components.
  • limit values can be present, for example, as a so-called envelope, within which the function should run.
  • the limits can be specified accordingly.
  • These limit values can be based, for example, on test measurements.
  • a work of the vibration generator required during the indentation of the rivet is determined and in particular displayed on display means, in particular graphically.
  • the work corresponds, for example, to the temporal integral over the performance from the beginning of the rivet to the rivet end. This allows a simple check and evaluation of the energy consumption of the riveting process.
  • a total thickness of the at least two components and a length of the rivet are further detected.
  • the process can be stopped before the riveting process begins, for example if the rivet is too long.
  • it can also be detected, for example, in connection with the course of the power, at which relative position of the components the rivet or its tip is currently located.
  • the total thickness of the at least two components and / or the length of the rivet are determined on the basis of the course of the power. While this could hitherto be done, for example, on the basis of the force as a function of the position of the punch, this is now very easily possible also via an increase in output, which already manifests itself in the first contact of the punch with the rivet element.
  • a vibration generator As a vibration generator, a sound generator, in particular an ultrasonic generator is used. This is a simple method for vibration generation. In addition, a simple detection of the power is possible with a sonic or ultrasonic generator.
  • the at least one component of the punch riveting device involved in pressing in the rivet comprises the rivet, the punch, the counterholder and / or at least one of the at least two components.
  • a vibration By coupling a vibration over various components, both heat can be generated, which simplifies the riveting process, as well as a necessary force on the rivet to be pressed into the components are reduced.
  • the stamp can be coupled directly to the vibrator or even be part of the vibrator. Nevertheless, in addition or alternatively, other of said components may be vibrated to enhance the riveting process.
  • a production device has a punch riveting device with a punch, a counterholder, a drive and a sound generator, and a computing unit.
  • the arithmetic unit e.g. a control unit or a control unit for a punch riveting apparatus is, according to the invention, in particular program-wise, designed to carry out a method according to the invention.
  • the production device preferably also has display means which are set up to display the course of the performance, in particular graphically.
  • Suitable data carriers for providing the computer program are in particular magnetic, optical and electrical memories, such as e.g. Hard drives, flash memory, EEPROMs, DVDs, etc. It is also possible to download a program via computer networks (Internet, intranet, etc.).
  • FIG. 1 is simplified and schematically shown a manufacturing device 100 according to the invention in a preferred embodiment.
  • the manufacturing device 100 it can For example, to an industrial robot in a production hall, for example, for an automotive body shop, act.
  • 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 is arranged, which in the Figures 2a to 2d 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 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 punch riveting apparatus 10 is shown in various phases of carrying out a method according to the invention in a preferred embodiment.
  • 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 the punch 15 and the Hold-down 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 a trough-shaped or recess 22 extends.
  • the rivet 20 here by way of example a half-tubular rivet, preferably consists of a material which is harder than the materials of the two components 11, 12, at least in the region of the rivet shank 24.
  • the flat top 26 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 punch 15 is operatively connected to a vibration generator 30 for generating vibrations.
  • a vibration generator 30 for generating vibrations.
  • ultrasonic vibrations with an amplitude (distance between maximum positive and negative amplitude of a vibration) between 10 .mu.m and 110 .mu.m (or an amplitude between 5 .mu.m and 55 .mu.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 of the rivet 20 into the components 11, 12.
  • the vibration generator 30 is connected to the computing unit 80, so that a power of the vibration generator 30 can be transmitted to the computing unit 80 or that the power can be detected by the computing unit 80.
  • a position sensor 40 which is adapted to detect a position x of the punch 15, is shown by way of example. This position x can be transmitted to the arithmetic unit 80.
  • Phase of the inventive method shown represents a beginning of the Stanznietvons in which the rivet shank 24 come into operative connection with the top of the component 11.
  • 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. 3 an exemplary force-position curve is shown in a punch rivet method without vibration coupling.
  • a force F is plotted against a time t.
  • F (x) is a course of a force F, which is applied to press the rivet on the punch, indicated as a function against the position x of the punch during pressing. It should be noted that here only a relative position x of the stamp is relevant.
  • an envelope is drawn with the limit values G 11 and G 21 , which characterize maximum or minimum permissible values for the force F or the function F (x). For example. For example, riveting operations in which the function F (x) exceeds or exceeds the limit values can be rejected as being too low quality.
  • limit values G 12 and G 22 are shown which lie within the envelope with the limit values G 11 and G 21 .
  • These limit values can, for example, serve as a warning curve, so that, for example, if these limit values are exceeded or exceeded, a corrective action can be initiated or the associated riveted connection can be classified as problematic.
  • a window 301 is shown, which indicates by way of example a process-relevant location, here an end position. In such a window, further limit values to be observed can be defined.
  • FIG. 4 Force-position curves and power-position curves are shown in a punch rivet method without oscillation coupling and in a method according to the invention in a preferred embodiment.
  • a force F or a power P are plotted against a position x in the diagrams shown on the left.
  • F (x) is a course of a force F, which is applied to press the rivet on the punch, indicated as a function against the position x of the punch during pressing in a Stanzniethabilit without vibration coupling.
  • P (x) is a curve of a power P of a vibration generator, which occurs when the rivet is pressed in, as a function of the position x of the punch when pressed in a punch riveting method without vibration coupling.
  • F '(x) is a course of a force F, which is applied to press the rivet on the punch, as a function of the position x of the punch when pressed in a method according to the invention indicated in a preferred embodiment.
  • P '(x) a curve of a power P of a vibration generator, which occurs when the rivet is pressed in, is indicated as a function with respect to the position x of the punch during pressing in a method according to the invention in a preferred embodiment.
  • the power curve P '(x) has a barely oscillating course. This can be seen particularly clearly in the enlarged section 402.
  • FIG. 5 further force-position curves and power-position curves are shown in a punch rivet method without vibration coupling and in a method according to the invention in a preferred embodiment.
  • a force F or a power P are plotted against a position x.
  • a plurality of comparable force profiles with Fs (x) are designated for a conventional punch riveting method and Fs' (x) for a method according to the invention.
  • Fs (x) a plurality of comparable force profiles with Fs (x) are designated for a conventional punch riveting method and Fs' (x) for a method according to the invention.
  • a number of comparable performance curves with P S (x) for a conventional punch riveting method and P S '(x) for a method according to the invention are designated for a conventional punch riveting method and Fs' (x) for a method according to the invention.
  • a transient point of the stamp which can be used, for example, as a sonotrode, and designated 502 a material separation.
  • a material separation is usually the point at which the rivet cuts through the punch side arranged component or punched called.
  • the performance curve can thus also be used for a quality assessment with regard to relevant process points and, in addition, the quality of the joining partner can be checked. Windows can also be used for a more detailed analysis of the performance, eg comparable to the one in FIG. 3 shown windows, with additional limits.

Claims (13)

  1. Procédé d'assemblage d'au moins deux éléments structuraux (11, 12) au moyen d'un dispositif de rivetage auto-poinçonneur (10),
    un rivet (20), disposé entre un poinçon (15) et un élément structural (11) faisant face au poinçon, parmi au moins deux éléments structuraux (11, 12) disposés entre le poinçon (15) et un contre-appui (18), étant enfoncé dans les au moins deux éléments structuraux (11, 12) au moyen du poinçon (15) en soumettant le poinçon (15) à une force (F) au moyen d'un mécanisme d'entraînement couplé au poinçon (15),
    au moins un composant (11, 12, 15, 18, 20) participant lors de l'enfoncement du rivet (20) étant amené à osciller au moyen d'un générateur d'oscillations (30), le générateur d'oscillations (30) utilisé étant un générateur de bruit,
    caractérisé en ce qu'une courbe d'une puissance (P) du générateur d'oscillations (30) pendant l'enfoncement du rivet (20) est déterminée, la courbe de puissance (P) étant utilisée pour une évaluation de la qualité d'une opération de rivetage auto-poinçonneur associée et/ou d'un assemblage des au moins deux éléments structuraux (11, 12) produit dans cette opération de rivetage auto-poinçonneur.
  2. Procédé selon la revendication 1, une courbe locale et/ou une courbe dans le temps de la puissance (P) étant déterminée.
  3. Procédé selon la revendication 3, l'évaluation de la qualité s'effectuant en comparant la puissance (P) du générateur d'oscillations avec des valeurs limites (G'11, G'12), lesquelles sont notamment prédéfinies en fonction d'une nature des au moins deux éléments structuraux (11, 12).
  4. Procédé selon l'une des revendications précédentes, un travail nécessaire du générateur d'oscillations (30) pendant l'enfoncement du rivet (20) étant déterminé.
  5. Procédé selon l'une des revendications précédentes, une épaisseur totale des au moins deux éléments structuraux (11, 12) et une longueur du rivet (20) étant en outre déterminées.
  6. Procédé selon la revendication 6, l'épaisseur totale des au moins deux éléments structuraux (11, 12) et/ou la longueur du rivet (20) étant en outre déterminées à l'aide de la courbe de puissance (P).
  7. Procédé selon l'une des revendications précédentes, la courbe de puissance (P) et/ou, en référence à la revendication 4, le travail nécessaire étant représentés, notamment sous forme graphique, sur des moyens d'affichage (90).
  8. Procédé selon l'une des revendications précédentes, la courbe de puissance (P) et/ou, en référence à la revendication 4, le travail nécessaire étant liés à une opération de rivetage auto-poinçonneur associée et enregistrés sur un support d'enregistrement.
  9. Procédé selon l'une des revendications précédentes, le générateur de bruit (30) utilisé étant un générateur d'ultrasons.
  10. Procédé selon l'une des revendications précédentes, l'au moins un composant du dispositif de rivetage auto-poinçonneur qui participe lors de l'enfoncement du rivet (20) comprenant le rivet (20), le poinçon (15), le contre-appui (18) et/ou au moins l'un des au moins deux éléments structuraux (11, 12).
  11. Appareil de fabrication (100) possédant un dispositif de rivetage auto-poinçonneur (10) comprenant un poinçon (15), un contre-appui (18), un mécanisme d'entraînement et un générateur de bruit (30), possédant de préférence en outre des moyens d'affichage (90), caractérisé en ce que l'appareil de fabrication possède une unité de calcul (80) qui est conçue pour mettre en oeuvre un procédé selon l'une des revendications précédentes.
  12. Programme informatique, qui amène l'unité de calcul (80) de l'appareil de fabrication selon la revendication 11, à mettre en oeuvre un procédé selon l'une des revendications 1 à 10 lorsqu'il est exécuté sur l'unité de calcul (80).
  13. Support d'enregistrement lisible par machine sur lequel est enregistré un programme informatique selon la revendication 12.
EP16172785.4A 2015-07-17 2016-06-03 Procédé de liaison d'au moins deux composants au moyen d'un dispositif de rivetage et dispositif de fabrication Active EP3117924B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102015213436.9A DE102015213436A1 (de) 2015-07-17 2015-07-17 Verfahren zum Verbinden wenigstens zweier Bauteile mittels einer Stanznietvorrichtung und Fertigungseinrichtung

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Publication Number Publication Date
EP3117924A1 EP3117924A1 (fr) 2017-01-18
EP3117924B1 true EP3117924B1 (fr) 2019-08-07

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DE102015224784A1 (de) * 2015-12-10 2017-06-14 Robert Bosch Gmbh Stanznietvorrichtung und Stanznietverfahren zum Stanznieten mit einer eine Stempelkraft unterstützenden Schwingung
CN106984760A (zh) * 2017-03-07 2017-07-28 昆明理工大学 一种应用于户外广告牌的自冲铆接方法
DE102018204722A1 (de) * 2018-03-28 2019-10-02 Robert Bosch Gmbh Verfahren zum Verbinden wenigstens zweier Bauteile mittels einer Stanznietvorrichtung und Stanznietvorrichtung
DE102018205101A1 (de) * 2018-04-05 2019-10-10 Robert Bosch Gmbh Verfahren zum Verbinden wenigstens zweier Bauteile mittels einer Stanznietvorrichtung und Stanznietvorrichtung
CN110017319B (zh) * 2019-04-16 2024-03-22 宾科精密部件(中国)有限公司 一种铆钉
CN111966062A (zh) * 2020-07-29 2020-11-20 安徽巨一科技股份有限公司 一种自冲孔铆接工艺质量状态的自动判定方法

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DE19731222C5 (de) * 1997-07-21 2016-10-13 Newfrey Llc Verfahren zum Ausbilden einer Stanznietverbindung sowie eine Fügevorrichtung für Stanzniete
EP1238715A1 (fr) * 2001-03-05 2002-09-11 Prokic Miodrag Actionneur structurel ultrasonique multifréquence
US7032296B2 (en) * 2003-11-21 2006-04-25 Newfrey Llc Self-piercing fastening system
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EP3117924A1 (fr) 2017-01-18

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