EP0893178A2 - Punching and stamping tool - Google Patents

Punching and stamping tool Download PDF

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Publication number
EP0893178A2
EP0893178A2 EP98112948A EP98112948A EP0893178A2 EP 0893178 A2 EP0893178 A2 EP 0893178A2 EP 98112948 A EP98112948 A EP 98112948A EP 98112948 A EP98112948 A EP 98112948A EP 0893178 A2 EP0893178 A2 EP 0893178A2
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EP
European Patent Office
Prior art keywords
piston
pressure
rivet
cylinder
stamping
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
EP98112948A
Other languages
German (de)
French (fr)
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EP0893178B1 (en
EP0893178A3 (en
Inventor
Georg Donhauser
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.)
Kerb Konus Vertriebs GmbH
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Kerb Konus Vertriebs GmbH
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Filing date
Publication date
Priority claimed from DE29713346U external-priority patent/DE29713346U1/en
Priority claimed from DE29716441U external-priority patent/DE29716441U1/en
Application filed by Kerb Konus Vertriebs GmbH filed Critical Kerb Konus Vertriebs GmbH
Publication of EP0893178A2 publication Critical patent/EP0893178A2/en
Publication of EP0893178A3 publication Critical patent/EP0893178A3/en
Application granted granted Critical
Publication of EP0893178B1 publication Critical patent/EP0893178B1/en
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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
    • B21J15/36—Rivet sets, i.e. tools for forming heads; Mandrels for expanding parts of hollow 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
    • B21J15/02—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
    • B21J15/16—Drives for riveting machines; Transmission means therefor
    • B21J15/20—Drives for riveting machines; Transmission means therefor operated by hydraulic or liquid pressure
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/53—Means to assemble or disassemble
    • Y10T29/53039—Means to assemble or disassemble with control means energized in response to activator stimulated by condition sensor
    • Y10T29/53061—Responsive to work or work-related machine element
    • Y10T29/53065—Responsive to work or work-related machine element with means to fasten by deformation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/53—Means to assemble or disassemble
    • Y10T29/53709—Overedge assembling means
    • Y10T29/5377—Riveter

Definitions

  • the invention relates to a stamping and embossing tool according to the preamble of claim 1.
  • Such stamping and embossing tools are used to connect two parts to be joined, preferably Sheets using a rivet.
  • Such rivets have a rivet head and a groove on the shaft
  • the two are placed on an anvil Joined parts are pressed together by a spring-loaded hold-down device, whereupon the rivet needle presses the rivet into the parts to be joined, and in the process punching slugs from the Parts to be punched out.
  • the rivet head With the further downward movement of the rivet needle the rivet head is pressed into the punched-out part of the upper part.
  • a stamp of the edge of the anvil's hole is printed in the lower part, the displaced material penetrating into the shaft groove.
  • the pressure exerted by the spring-loaded hold-down device is often not sufficient to press the two joining parts against one another without a gap, which is particularly the case with hard and thick sheet metal is the case.
  • the strength of the riveted joints is therefore differently.
  • the same disadvantage occurs when the parts to be joined are different Show tolerances. Since the movement of the ram is controlled away, must Thickness tolerances can be compensated for by adjusting the height of the anvil.
  • the task is to design the stamping and embossing tool so that it is flawless Rivet connection between the parts to be joined is achieved.
  • the stamping and embossing tool has a hydraulic cylinder 1, in which two pistons 2, 3 are guided.
  • the rivet needle 4 is connected to the upper piston 2, while with the lower piston 3, a press cylinder 5 is connected, which in Fig. 1st press ram, not shown.
  • With the upper piston 2 is still connected a hollow piston rod 6.
  • the piston 2 has bores 7, which the space 8th Connect between pistons 2, 3 to the inside of piston rod 6.
  • the cylinder 1 has a connection 9 which opens into the cylinder space above the piston 2.
  • the inside of the piston rod 6 is connected to a further connection 10, while the cylinder space below the piston 3 is connected to a third connection 11.
  • a first pressure cylinder 12 Connected to port 9 is a first pressure cylinder 12 with which another Printing cylinder 13 can be connected, with which in turn a third printing cylinder 14 is connectable.
  • the connection 10 is connected to an adjustable throttle 15, the is in turn connected to a variable-volume pressure chamber 16.
  • the sequence of operations is as follows:
  • the piston 17 of the pressure cylinder 14 is initially himself in his left position. Take the pistons 18 and 19 of the pressure cylinders 12, 13 their right position as shown. This creates a hydraulic connection from the impression cylinder 14 via the impression cylinder 13 and the impression cylinder 12 to Connection 9.
  • the throttle 15 is open, so that a direct connection between the Space 8, the holes 7, the hollow piston rod 6, the connection 10, the throttle 15th to the left side of the piston 20 of the pressure chamber 16. To the right side of the Piston 20 acts at a constant pressure.
  • the piston 2 has approached the piston 3 by a predetermined distance, which is greater than the length of the rivet, the pressure cylinder 12 is activated by Compressed air supply at port 23 of piston 18 is moved to the left. At this Movement, the connection between the cylinders 12, 13 is interrupted. From Pressure cylinder 12, oil is supplied to port 9 under high pressure. With Actuation of the pressure cylinder 12, the throttle 15 is activated, so that between the throttle resistor 10 and the pressure chamber 16 are built up. This throttle resistance is adjustable.
  • the piston 3 thus has a high resistance, but due to the throttle resistance adjustable pressure, which causes the ram 25 attached to the press cylinder 5 exerts a high hold-down force on the joining parts 24A, 24B, which is thus gap-free lie against each other, see position according to Fig. 3.
  • the rivet 29 of the Rivet needle 4 pressed through the joining parts 24A, 24B and the rivet head into the generated Bore of the upper joining part 24A, see position according to FIG. 4.
  • the pistons 17, 18, 19 are returned to their starting position.
  • the throttle 15 will be opened.
  • the oil pressure in the pressure chamber 16 separates the two pistons 2, 3 from one another.
  • a pressure is built up below the piston 3 via the connection 11, so that both pistons 2, 3 are returned to their starting position.
  • the hydraulic cylinder 1 is connected to the tool frame via a C-bracket 23 is.
  • the tool head comprises the rivet needle 4 and the ram 25, the one Has bore through which the rivet needle 4 is displaceable.
  • the ram 25 is attached to the press cylinder 5.
  • At the lower end of the rivet needle 4 is a Flanged valve body 30, the slide of the rivet 29 the lower end of the Rivet needle 4 feeds.
  • the press ram 25 has the function of a hold-down device.
  • the to each other connecting joining parts are designated with 24A and 24B. They are on anvil 26 on this anvil 26 is provided with a bore 27 which is formed by an embossing lip 28 is surrounded.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Insertion Pins And Rivets (AREA)
  • Ink Jet (AREA)
  • Forging (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)

Abstract

The riveting tool has a hydraulic cylinder (1) with two pistons (2,3), where one piston (2) carries the rivet pin (4) and the other piston (3) has the ram (5). The zone (8) between the pistons (2,3) is linked to a pressure zone, with a variable volume, towards the cylinder zone of one piston (2) and connected to a pressure cylinder (12). A control system determines the working of the apparatus. After a rivet has been positioned under the rivet pin (4), and the ram is against the upper layer of the plates to be bonded together, the pressure cylinder (12) is activated and a throttle (15) is tripped between the intermediate zone (8) and pressure zone to trigger the rivet punching action. It also exerts a retaining pressure on the materials being riveted through the ram by pressure from the cylinder (12) forcing one piston (2) towards the other piston (3) to keep them together under pressure until the stamping action.

Description

Die Erfindung betrifft ein Stanz-Prägewerkzeug nach dem Oberbegriff des Anspruches 1.The invention relates to a stamping and embossing tool according to the preamble of claim 1.

Derartige Stanz-Prägewerkzeuge dienen der Verbindung zweier Fügeteile, bevorzugt Bleche, mittels einem Niet. Solche Niete weisen einen Nietkopf und am Schaft eine Nut auf Bei den bekannten Werkzeugen werden die beiden auf einem Amboß aufliegenden Fügeteile durch einen federbelasteten Niederhalter gegeneinandergedrückt, worauf dann die Nietnadel den Niet in die Fügeteile drückt, und hierbei Stanzbutzen aus den Fügeteilen herausgestanzt werden. Bei der weiteren Abwärtsbewegung der Nietnadel wird der Nietkopf in die Ausstanzung des oberen Fügeteils gedrückt. Danach wird durch einen Preßstempel der Rand der Bohrung des Amboß in das untere Fügeteil gedruckt, wobei das verdrängte Material in die Schaftnut eindringt. Eine solche Vorgehensweise ist in der DE-A 23 45 017 beschrieben.Such stamping and embossing tools are used to connect two parts to be joined, preferably Sheets using a rivet. Such rivets have a rivet head and a groove on the shaft In the known tools, the two are placed on an anvil Joined parts are pressed together by a spring-loaded hold-down device, whereupon the rivet needle presses the rivet into the parts to be joined, and in the process punching slugs from the Parts to be punched out. With the further downward movement of the rivet needle the rivet head is pressed into the punched-out part of the upper part. After that, through a stamp of the edge of the anvil's hole is printed in the lower part, the displaced material penetrating into the shaft groove. Such an approach is described in DE-A 23 45 017.

Der vom federbelasteten Niederhalter ausgeübte Druck ist oftmals nicht ausreichend, die beiden Fügeteile spaltfrei gegeneinander zu drücken, was insbesondere bei harten und dicken Blechen der Fall ist. Die Festigkeit der Nietverbindungen ist daher unterschiedlich. Der gleiche Nachteil tritt auf wenn die Fügeteile unterschiedliche Toleranzen aufweisen. Da die Bewegung des Preßstempels weggesteuert ist, müssen Dickentoleranzen durch Höhenverstellung des Amboß ausgeglichen werden.The pressure exerted by the spring-loaded hold-down device is often not sufficient to press the two joining parts against one another without a gap, which is particularly the case with hard and thick sheet metal is the case. The strength of the riveted joints is therefore differently. The same disadvantage occurs when the parts to be joined are different Show tolerances. Since the movement of the ram is controlled away, must Thickness tolerances can be compensated for by adjusting the height of the anvil.

Es besteht die Aufgabe, das Stanz-Prägewerkzeug so auszubilden, daß eine einwandfreie Nietverbindung zwischen den Fügeteilen erreicht wird.The task is to design the stamping and embossing tool so that it is flawless Rivet connection between the parts to be joined is achieved.

Gelöst wird diese Aufgabe mit den Merkmalen des Anspruches 1. Vorteilhafte Ausgestaltungen sind den Unteransprüchen entnehmbar.This problem is solved with the features of claim 1. Advantageous Refinements can be found in the subclaims.

Ein Ausführungsbeispiel wird nachfolgend anhand der Zeichnungen näher erläutert. Es Zeigen:

  • Fig. 1A und 1 B einen Schnitt durch den Hydraulikzylinder und die daran angeschlossenen Aggregate;
  • Fig. 2 eine Seitenansicht des Werkzeugs in Ausgangsstellung mit geschnittenem Kopf mit kurzem Mundstück;
  • Fig. 3 eine der Figur 2 entsprechende Darstellung mit gegen die Fügeteile anstoßendem Niederhalter;
  • Fig 4 einen Schnitt durch den Kopfbeim Setzen des Niets und
  • Fig. 5 eine der Figur 4 entsprechende Darstellung beim Prägen der Fügeteile.
    • An embodiment is explained below with reference to the drawings. Show it:
  • 1A and 1B show a section through the hydraulic cylinder and the units connected thereto;
  • 2 shows a side view of the tool in the starting position with a cut head with a short mouthpiece;
  • 3 shows a representation corresponding to FIG. 2 with the holding-down device abutting against the joining parts;
  • Fig. 4 shows a section through the head when setting the rivet and
  • 5 shows a representation corresponding to FIG. 4 when embossing the parts to be joined.

    • Das Stanz-Prägewerkzeug weist einen Hydraulikzylinder 1 auf, in welchem zwei Kolben 2, 3 verschiebbar geführt sind. Mit dem oberen Kolben 2 ist die Nietnadel 4 verbunden, während mit dem unteren Kolben 3 ein Preßzylinder 5 verbunden ist, der den in Fig. 1 nicht dargestellten Preßstempel trägt. Mit dem oberen Kolben 2 ist weiterhin verbunden eine hohle Kolbenstange 6. Der Kolben 2 weist Bohrungen 7 auf, die den Raum 8 zwischen den Kolben 2, 3 mit dem Inneren der Kolbenstange 6 verbinden. Der Zylinder 1 weist einen Anschluß 9 auf, der in den Zylinderraum oberhalb des Kolbens 2 mündet. Das Innere der Kolbenstange 6 ist verbunden mit einem weiteren Anschluß 10, während der Zylinderraum unterhalb des Kolbens 3 mit einem dritten Anschluß 11 verbunden ist.The stamping and embossing tool has a hydraulic cylinder 1, in which two pistons 2, 3 are guided. The rivet needle 4 is connected to the upper piston 2, while with the lower piston 3, a press cylinder 5 is connected, which in Fig. 1st press ram, not shown. With the upper piston 2 is still connected a hollow piston rod 6. The piston 2 has bores 7, which the space 8th Connect between pistons 2, 3 to the inside of piston rod 6. The cylinder 1 has a connection 9 which opens into the cylinder space above the piston 2. The inside of the piston rod 6 is connected to a further connection 10, while the cylinder space below the piston 3 is connected to a third connection 11.

    Mit dem Anschluß 9 verbunden ist ein erster Druckzylinder 12, mit dem ein weiterer Druckzylinder 13 verbindbar ist, mit dem seinerseits ein dritter Druckzylinder 14 verbindbar ist. Der Anschluß 10 ist verbunden mit einer einstellbaren Drossel 15, die ihrerseits verbunden ist mit einem volumenveränderlichen Druckraum 16. Connected to port 9 is a first pressure cylinder 12 with which another Printing cylinder 13 can be connected, with which in turn a third printing cylinder 14 is connectable. The connection 10 is connected to an adjustable throttle 15, the is in turn connected to a variable-volume pressure chamber 16.

    Die Arbeitsfolge ist wie folgt: Der Kolben 17 des Druckzylinders 14 befindet anfänglich sich in seiner linken Stellung. Die Kolben 18 und 19 der Druckzylinder 12, 13 nehmen ihre rechte Stellung wie dargestellt ein. Hierdurch besteht eine hydraulische Verbindung vom Druckzylinder 14 über den Druckzylinder 13 und den Druckzylinder 12 zum Anschluß 9. Die Drossel 15 ist geöffnet, so daß eine direkte Verbindung zwischen dem Raum 8, den Bohrungen 7, der hohlen Kolbenstange 6, dem Anschluß 10, der Drossel 15 zur linken Seite des Kolbens 20 des Druckraums 16 besteht. Auf die rechte Seite des Kolbens 20 wirkt ein konstanter Druck.The sequence of operations is as follows: The piston 17 of the pressure cylinder 14 is initially himself in his left position. Take the pistons 18 and 19 of the pressure cylinders 12, 13 their right position as shown. This creates a hydraulic connection from the impression cylinder 14 via the impression cylinder 13 and the impression cylinder 12 to Connection 9. The throttle 15 is open, so that a direct connection between the Space 8, the holes 7, the hollow piston rod 6, the connection 10, the throttle 15th to the left side of the piston 20 of the pressure chamber 16. To the right side of the Piston 20 acts at a constant pressure.

    Nachdem ein Niet dem unteren Ende der Nietnadel 4 zugeführt wurde, der dort mittels Unterdruck gehalten wird, wird Druckluft über den Anschluß 21 dem Druckzylinder 14 zugeführt, womit dessen Kolben 17 nach rechts gedruckt wird und Druck über den Druckzylinder 13 und den Druckzylinder 12 dem Anschluß 9 Zugeführt wird, da die Verbindungen zwischen allen Druckzylindern geöffnet sind. Im Raum 8 zwischen den Zylindern 2, 3 herrscht ein vom Druckraum 16 bestimmter Druck. Dieser Druck im Raum 8 ist größer als der vom Druckzylinder 14 ausgeübte Druck, der auf die Oberseite des Kolbens 2 wirkt. Hierdurch wird erreicht, daß bei Ölzufuhr zum Anschluß 9 beide Kolben 2, 3 synchron nach unten bewegt werden.After a rivet has been fed to the lower end of the rivet needle 4, there by means of Is kept under pressure, compressed air via the port 21, the pressure cylinder 14th fed, whereby the piston 17 is printed to the right and pressure over the Printing cylinder 13 and the printing cylinder 12 is fed to the port 9 since the Connections between all printing cylinders are open. In room 8 between the Cylinders 2, 3 have a pressure determined by the pressure chamber 16. This pressure in Space 8 is greater than the pressure exerted by the pressure cylinder 14 on the upper side of the piston 2 acts. This ensures that both with oil supply to port 9 Pistons 2, 3 are moved down synchronously.

    Trifft bei dieser Abwärtsbewegung der Preßstempel 25 auf dem oberen Fügeteil 24A auf, wird im Druckzylinder 14 an der rechten Seite des Kolbens 17 ein Gegendruck aufgebaut. Bei Erreichen eines vorgegebenen Gegendrucks wird der Druckzylinder 13 aktiviert, in dem über den dortigen Anschluß 22 Druckluft zugeführt wird, die den Kolben 19 nach links bewegt. Dabei wird die Verbindung zwischen dem Druckzylinder 14 und dem Druckzylinder 13 verschlossen und ein Öldruck erzeugt, der größer ist als der Öldruck im Raum 8. Das vom Druckzylinder 13 dem Anschluß 9 zugeführte Öl bewirkt, daß der Kolben 2 sich dem Kolben 3 nähert, wobei das Öl im Raum 8 in den Druckraum 16 befördert wird und dabei der Kolben 20 nach rechts verschoben wird. If the ram 25 hits the upper joining part 24A during this downward movement, a back pressure in the pressure cylinder 14 on the right side of the piston 17 built up. When a predetermined back pressure is reached, the pressure cylinder 13 activated, in which 22 compressed air is supplied via the connection there, the Piston 19 moved to the left. The connection between the pressure cylinder 14 and the pressure cylinder 13 closed and generates an oil pressure that is greater than the oil pressure in the room 8. The oil supplied from the pressure cylinder 13 to the connection 9 causes the piston 2 to approach the piston 3, the oil in the space 8 in the Pressure chamber 16 is conveyed and the piston 20 is shifted to the right.

    Hat sich der Kolben 2 dem Kolben 3 um eine vorgegebene Distanz genähert, die größer ist als die Lange des Niets, wird der Druckzylinder 12 aktiviert, indem durch Druckluftzufuhr am Anschluß 23 der Kolben 18 nach links bewegt wird. Bei dieser Bewegung wird die Verbindung zwischen den zylindern 12, 13 unterbrochen. Vom Druckzylinder 12 wird Öl unter hohem Druck dem Anschluß 9 zugeführt. Mit Betätigung des Druckzylinders 12 wird auch die Drossel 15 aktiviert, so daß zwischen dem Anschluß 10 und der Druckkammer 16 ein Drosselwiderstand aufgebaut wird. Dieser Drosselwiderstand ist einstellbar.The piston 2 has approached the piston 3 by a predetermined distance, which is greater than the length of the rivet, the pressure cylinder 12 is activated by Compressed air supply at port 23 of piston 18 is moved to the left. At this Movement, the connection between the cylinders 12, 13 is interrupted. From Pressure cylinder 12, oil is supplied to port 9 under high pressure. With Actuation of the pressure cylinder 12, the throttle 15 is activated, so that between the throttle resistor 10 and the pressure chamber 16 are built up. This throttle resistance is adjustable.

    Auf dem Kolben 3 wirkt somit ein hoher, jedoch durch den Drosselwiderstand einstellbarer Druck, der bewirkt, daß der am Preßzylinder 5 befestigte Preßstempel 25 eine hohe Niederhaltekraft auf die Fügeteile 24A, 24B ausübt, die somit spaltfrei gegeneinander liegen, siehe Stellung nach Fig. 3. Gleichzeitig wird der Niet 29 von der Nietnadel 4 durch die Fügeteile 24A, 24B gepreßt und der Nietkopf in die erzeugte Bohrung des oberen Fügeteils 24A, siehe Stellung nach Fig. 4.The piston 3 thus has a high resistance, but due to the throttle resistance adjustable pressure, which causes the ram 25 attached to the press cylinder 5 exerts a high hold-down force on the joining parts 24A, 24B, which is thus gap-free lie against each other, see position according to Fig. 3. At the same time the rivet 29 of the Rivet needle 4 pressed through the joining parts 24A, 24B and the rivet head into the generated Bore of the upper joining part 24A, see position according to FIG. 4.

    Am Ende seiner Abwärtsbewegung sitzt der Kolben 2 auf dem Kolben 3 auf, womit der Preßstempel 25 mit hohem Druck auf das obere Fügeteil 24A preßt und somit die Prägelippe 28 des Amboß 26 in das untere Fügeteil 24B gepreßt wird und das verdrängte Material in die Schaftnut des Niets 29 eindringt. Der Stanz-Prägevorgang ist somit beendet, siehe Stellung nach Fig. 5.At the end of its downward movement, the piston 2 sits on the piston 3, with which the Press ram 25 presses with high pressure on the upper joining part 24A and thus the Embossing lip 28 of the anvil 26 is pressed into the lower joining part 24B and the displaced Material penetrates into the shaft groove of the rivet 29. The stamping and embossing process is thus finished, see position according to FIG. 5.

    Die Kolben 17, 18, 19 werden in ihre Ausgangsstellung zurückgeführt. Die Drossel 15 wird geöffnet. Der Öldruck im Druckraum 16 trennt die beiden Kolben 2, 3 voneinander. Gleichzeitig wird über den Anschluß 11 ein Druck unterhalb des Kolbens 3 aufgebaut, so daß beide Kolben 2, 3 in ihre Ausgangsstellung zurückgeführt werden.The pistons 17, 18, 19 are returned to their starting position. The throttle 15 will be opened. The oil pressure in the pressure chamber 16 separates the two pistons 2, 3 from one another. At the same time, a pressure is built up below the piston 3 via the connection 11, so that both pistons 2, 3 are returned to their starting position.

    Der Hydraulikzylinder 1 ist über einen C-Bügel 23 mit dem Werkzeuggestell verbunden ist. Der Werkzeugkopf umfaßt die Nietnadel 4 und den Preßstempel 25, der eine Bohrung aufweist, durch welche die Nietnadel 4 verschiebbar ist. Der Preßstempel 25 ist am Preßzylinder 5 befestigt. In Höhe des unteren Endes der Nietnadel 4 ist ein Schiebergehäuse 30 angeflanscht, dessen Schieber den Niet 29 dem unteren Ende der Nietnadel 4 zuführt.The hydraulic cylinder 1 is connected to the tool frame via a C-bracket 23 is. The tool head comprises the rivet needle 4 and the ram 25, the one Has bore through which the rivet needle 4 is displaceable. The ram 25 is attached to the press cylinder 5. At the lower end of the rivet needle 4 is a Flanged valve body 30, the slide of the rivet 29 the lower end of the Rivet needle 4 feeds.

    Der Preßstempel 25 hat die Aufgabe eines Niederhalters. Die miteinander zu verbindenden Fügeteile sind mit 24A und 24B bezeichnet. Sie liegen auf dem Amboß 26 auf Dieser Amboß 26 ist mit einer Bohrung 27 versehen, welche von einer Prägelippe 28 umgeben ist.The press ram 25 has the function of a hold-down device. The to each other connecting joining parts are designated with 24A and 24B. They are on anvil 26 on this anvil 26 is provided with a bore 27 which is formed by an embossing lip 28 is surrounded.

    Ausgehend von der Stellung nach Figur 2 werden die Nietnadel 4 und der Preßstempel 25 in die Stellung nach Figur 3 abgesenkt, in welcher der Preßstempel 25 die Fügeteile 24A und 24B gegeneinander und gegen den Amboß 26 preßt. Sodann wird die Nietnadel 4, an derem unteren Ende der Niet 29 gehalten wird, durch die Bohrung im Preßstempel 25 bewegt, wobei der Niet 29 in die Fügeteile 24A, 24B gedrückt wird, bis der Nietkopf mit der Oberfläche des Fügeteils 24A eine bündige Fläche bildet. Die Stanzbutzen fallen hierbei durch die Bohrung 27. Nach dem Setzen des Niets 29 drückt der Preßstempel 25 mit erhöhtem Druck gegen das Fügeteil 24A. Dabei dringt die Prägelippe 28 um das untere Ende des Nietschaftes herum in das Fügeteil 24B ein, wobei Material des Fügeteils 24B in die Schaftnut des Niets 29 gepreßt wird.Starting from the position shown in Figure 2, the rivet needle 4 and the ram 25 lowered into the position shown in Figure 3, in which the ram 25 the parts to be joined 24A and 24B presses against each other and against the anvil 26. Then the rivet needle 4, at whose lower end the rivet 29 is held, through the hole in the press ram 25 moves, the rivet 29 being pressed into the joining parts 24A, 24B until the rivet head forms a flush surface with the surface of the joining part 24A. The punch slugs fall here through the bore 27. After the rivet 29 has been set, the press ram 25 presses with increased pressure against the joining part 24A. The embossing lip 28 penetrates around it around the lower end of the rivet shaft into the joining part 24B, material of the Joining part 24B is pressed into the shaft groove of the rivet 29.

    Claims (7)

    Stanz-Prägewerkzeug mit einer in einer Bohrung eines Preßstempels (25) verschiebbaren Nietnadel (4) zum Verbinden von Fügeteilen (24a, 24B) mittels eines Niets (29), bei dem bei der Abwärtsbewegung der Nietnadel (4) der Niet (29) in die Fügeteile (24A, 24B) gedruckt wird und sodann der Preßstempel (25) eine Prägekraft erzeugt, durch welche ein Amboß (26) eine Verformung des Materials des auf dem Amboß (26) aufliegenden Fügeteils (24B) bewirkt, wodurch Material in die Schaftnut des Niets (29) gedrückt wird, dadurch gekennzeichnet, daß ein Hydraulikzylinder (1) mit zwei Kolben (2, 3) vorgesehen ist, der eine Kolben (2) die Nietnadel (4) der andere Kolben (3) den Preßstempel (5, 25) trägt, der Raum (8) zwischen den Kolben (2, 3) mit einem volumenveränderlichen Druckraum (16) verbindbar ist, der zylinderraum, der dem einen Kolben (2) zugewandt ist, mit einem Druckzylinder (12) verbunden ist, und eine Steuerung vorgesehen ist, die, nachdem ein Niet (29) unter die Nietnadel (4) zugeführt wurde und bei auf dem oberen Fügeteil (24A) aufsitzenden Preßstempel (25) den einen Druckzylinder (12) aktiviert und eine Drossel (15) zwischen dem Raum (8) zwischen den Kolben (2, 3) und dem Druckraum (16) zwischenschaltet und hierbei zur Ausführung des Stanzvorgangs und zur Ausübung einer Niederhaltekraft durch den Preßstempel (25) der Druck des Druckzylinders (12) den einen Kolben (2) in Richtung des anderen Kolbens (3) druckt, bis, zur Ausführung des Prägevorgangs, der eine Kolben (2) auf dem anderen Kolben (3) aufliegt.Stamping and embossing tool with a rivet needle (4) which can be displaced in a bore of a press ram (25) for connecting joining parts (24a, 24B) by means of a rivet (29), in which the rivet (29) moves in when the rivet needle (4) moves downwards the joining parts (24A, 24B) are printed and then the press die (25) generates an embossing force, by means of which an anvil (26) causes a deformation of the material of the joining part (24B) resting on the anvil (26), whereby material enters the shaft groove of the rivet (29), characterized in that a hydraulic cylinder (1) with two pistons (2, 3) is provided, one piston (2) the rivet needle (4) the other piston (3) the press ram (5, 25), the space (8) between the pistons (2, 3) can be connected to a variable-volume pressure chamber (16), the cylinder space facing the one piston (2) is connected to a pressure cylinder (12), and a control is provided which, after a rivet (29) is placed under the rivet needle ( 4) has been supplied and, when the ram (25) is seated on the upper joining part (24A), activates one pressure cylinder (12) and a throttle (15) between the space (8) between the pistons (2, 3) and the pressure space (16 ) interposed and in doing so to carry out the stamping process and to exert a hold-down force by the press ram (25), the pressure of the pressure cylinder (12) presses one piston (2) in the direction of the other piston (3) until, to carry out the stamping process, the one piston (2) rests on the other piston (3). Stanz-Prägewerkzeug nach Anspruch 1, dadurch gekennzeichnet, daß der Drosselwiderstand der Drossel (15) einstellbar ist. Stamping and embossing tool according to claim 1, characterized in that the throttle resistance of the throttle (15) is adjustable. Stanz-Prägewerkzeug nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der eine Kolben (2) eine hohle Kolbenstange (6) aufweist, die mit der Drossel (15) verbunden ist und in welcher Bohrungen (7) durch diesen einen Kolben (2) münden, die zum Raum (8) zwischen den Kolben (2, 3) führen.Stamping and embossing tool according to claim 1 or 2, characterized in that the one piston (2) has a hollow piston rod (6) which is connected to the throttle (15) and in which bores (7) through this a piston (2) open into the space (8) between the pistons (2, 3). Stanz-Prägewerkzeug nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß ein weiterer Druckzylinder (13) vorgesehen ist, der mit dem Zylinderraum verbindbar ist, der dem einen Kolben (2) zugewandt ist, der einen Druck erzeugt, der geringer ist als derjenige des einen Druckzylinders (12), jedoch größer ist als derjenige im Druckraum (16) und bei dessen Aktivierung der eine Kolben (2) in Richtung des anderen Kolbens (3) gedrückt wird, bis die Kolben (2, 3) einen vorgegebenen Abstand zueinander aufweisen, worauf dann der Zylinderraum mit dem einen Druckzylinder (12) verbunden wird.Stamping and embossing tool according to one of Claims 1 to 3, characterized in that a further pressure cylinder (13) is provided which can be connected to the cylinder space and which faces the one piston (2) which generates a pressure which is lower than that of the one pressure cylinder (12), however, is larger than that in the pressure chamber (16) and when it is activated, one piston (2) is pressed in the direction of the other piston (3) until the pistons (2, 3) have a predetermined distance have each other, whereupon the cylinder space is connected to the one pressure cylinder (12). Stanz-Prägewerkzeug nach Anspruch 4, dadurch gekennzeichnet, daß ein dritter Druckzylinder (14) vorgesehen ist, der mit dem Zylinderraum verbindbar ist, der dem einen Kolben (2) zugewandt ist, der einen Druck erzeugt, der geringer ist als derjenige im Druckraum (16) und bei dessen Aktivierung beide Kolben (2, 3) in Richtung der Fügeteile (24A, 24B) gedrückt werden, bis der Preßstempel (25) das obere Fügeteil berührt, worauf dann der Zylinderraum mit dem weiteren Druckzylinder (13) verbunden wird.Stamping and embossing tool according to Claim 4, characterized in that a third pressure cylinder (14) is provided which can be connected to the cylinder space and which faces the one piston (2) which generates a pressure which is lower than that in the pressure space ( 16) and when it is activated both pistons (2, 3) are pressed in the direction of the joining parts (24A, 24B) until the press ram (25) touches the upper joining part, whereupon the cylinder space is then connected to the further pressure cylinder (13). Stanz-Prägewerkzeug nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die im Preßstempel (25) geführte Nietnadel (4) eine längs der Nietnadel (4) verlaufende und an eine Unterdruckquelle anschließbare Bohrung aufweist, die an der Spitze der Nietnadel (4) mündet. Stamping and embossing tool according to one of Claims 1 to 5, characterized in that the rivet needle (4) guided in the press ram (25) has a bore which runs along the rivet needle (4) and can be connected to a vacuum source and which is at the tip of the rivet needle (4 ) flows out. Stanz-Prägewerkzeug nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß im Bereich der Spitze der Nietnadel (4) ein Schiebergehäuse (30) angeordnet ist, in dem ein Schieber quer zur Nietnadel (4) verschiebbar angeordnet ist, der den Niet (29) zu dieser Spitze verschiebt.Stamping and embossing tool according to one of claims 1 to 6, characterized in that a slide housing (30) is arranged in the region of the tip of the rivet needle (4), in which a slide is arranged so as to be displaceable transversely to the rivet needle (4) and it 29) moves to this tip.
    EP98112948A 1997-07-26 1998-07-13 Punching and stamping tool Expired - Lifetime EP0893178B1 (en)

    Applications Claiming Priority (6)

    Application Number Priority Date Filing Date Title
    DE29713346U DE29713346U1 (en) 1997-07-26 1997-07-26 Stamping and embossing tool
    DE29713346U 1997-07-26
    DE29716441U 1997-09-12
    DE29716441U DE29716441U1 (en) 1997-09-12 1997-09-12 Stamping and embossing tool
    DE19808016 1998-02-26
    DE19808016A DE19808016A1 (en) 1997-09-12 1998-02-26 Stamping tool to set connecting rivets

    Publications (3)

    Publication Number Publication Date
    EP0893178A2 true EP0893178A2 (en) 1999-01-27
    EP0893178A3 EP0893178A3 (en) 2000-08-16
    EP0893178B1 EP0893178B1 (en) 2003-04-09

    Family

    ID=27218166

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP98112948A Expired - Lifetime EP0893178B1 (en) 1997-07-26 1998-07-13 Punching and stamping tool

    Country Status (4)

    Country Link
    US (1) US6041493A (en)
    EP (1) EP0893178B1 (en)
    CA (1) CA2243922C (en)
    ES (1) ES2193444T3 (en)

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    DE102006013651B4 (en) * 2005-10-14 2008-09-25 Richard Bergner Verbindungstechnik Gmbh & Co. Kg Tool unit and method for axially displacing a tool head
    CN108099219A (en) * 2017-12-20 2018-06-01 吉林大学 A kind of viscous rivetting method between carbon fibre composite plate and aluminium alloy plate

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    US7753230B2 (en) * 2007-12-20 2010-07-13 Mikio Kusano Nut feeder
    DE102015000625A1 (en) * 2014-02-03 2015-08-06 Kiefel Gmbh Riveting method, riveting tool, riveting system and airbag component
    CN109454194A (en) * 2018-07-27 2019-03-12 宾科精密部件(中国)有限公司 The pressure riveting device of fluid pressure actuated

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    Also Published As

    Publication number Publication date
    CA2243922C (en) 2006-09-26
    ES2193444T3 (en) 2003-11-01
    US6041493A (en) 2000-03-28
    EP0893178B1 (en) 2003-04-09
    CA2243922A1 (en) 1999-01-26
    EP0893178A3 (en) 2000-08-16

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