EP1055466B1 - Hydraulic drive unit for an assembling tool - Google Patents
Hydraulic drive unit for an assembling tool Download PDFInfo
- Publication number
- EP1055466B1 EP1055466B1 EP00110295A EP00110295A EP1055466B1 EP 1055466 B1 EP1055466 B1 EP 1055466B1 EP 00110295 A EP00110295 A EP 00110295A EP 00110295 A EP00110295 A EP 00110295A EP 1055466 B1 EP1055466 B1 EP 1055466B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- drive
- punch
- clamp
- pressure
- piston
- 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.)
- Expired - Lifetime
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
- B21D39/03—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of sheet metal otherwise than by folding
- B21D39/031—Joining superposed plates by locally deforming without slitting or piercing
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- 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
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49826—Assembling or joining
- Y10T29/49833—Punching, piercing or reaming part by surface of second part
- Y10T29/49835—Punching, piercing or reaming part by surface of second part with shaping
- Y10T29/49837—Punching, piercing or reaming part by surface of second part with shaping of first part
-
- 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
- Y10T29/5307—Self-piercing work part
-
- 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 present invention relates to a hydraulic drive device for a tool for joining at least two workpieces made of ductile material according to the preamble of claim 1, especially for punch riveting or clinching.
- Such drive devices settle usually from a stamp drive for actuating a stamp for the joining process and a hold-down drive for actuating the workpieces during of the holding-down clamp.
- Both drives are designed as a piston-cylinder unit, the cylinders of the two drives are firmly connected and the piston of the hold-down drive between the piston rod of the punch drive and the cylinder of the hold-down drive is arranged concentrically so that it has a pressure chamber with a own pressure medium connection to generate the hold-down force telescopically is movable.
- a spring is used, but there are a total of three pressure medium connections (two for the punch drive and one for the hold-down drive) required what the drive device and in particular its hydraulic supply comparatively expensive.
- the present invention has for its object a hydraulic Drive device for a tool for joining at least two workpieces to create from ductile material that has the simplest possible structure and nevertheless the generation of a uniform hydraulic hold-down force for The workpieces can be clamped.
- the hold-down drive from the piston rod of the punch drive, and the pressure chamber of the hold-down drive is connected to a working chamber of the stamp drive, so that Generate the hold-down force from this working chamber to the pressure chamber of the hold-down drive is transmitted.
- connection of the relevant working chamber is expedient Stamp drive via a pressure relief valve with a low pressure range connectable to the pressure in the pressure chamber of the hold-down drive and thus limit the hold-down force to an adjustable value.
- the drive device designed according to the invention is also distinguished by comparatively low manufacturing costs, which by the simplified Structure, the smaller number of stroke-dependent individual parts and a simpler one Hydraulic supply are conditional.
- Figures 1 to 4 each represent a longitudinal section through a hydraulic Drive device in different operating states.
- the drive device shown in the figures is used for punch riveting two plate-shaped workpieces A, B, which are supported on a die M.
- the drive device can also be used for other joining processes, e.g. to the Clinching or in general for machining workpieces by means of a stamp such as used in punching.
- the drive device has a stamp drive 2 in the form of a piston-cylinder unit with a cylinder 4, for example on a C-frame (not shown) is firmly attached.
- a piston 6 In the cylinder 4 is a piston 6 with a piston rod 8 slidably mounted.
- the piston 6 divides the interior the cylinder 4 into a first working chamber 12 and a second working chamber 14, each with its own connection 16 or 18 with a hydraulic Pressure medium source (not shown) can be connected.
- the piston rod 8 is fixed at its lower end with a stamp 10 connected, in the illustrated embodiment for performing the riveting process serves.
- the piston rod 8 of the stamp drive 2 carries a hold-down drive in a self-supporting manner 20, which is also designed as a piston-cylinder unit. More accurate said hold-down drive 20 has a piston 22 which is connected to piston rod 8 molded in one piece, that is firmly connected to the piston rod 8.
- the hold-down drive 20 also has a cylinder 24 on the piston rod 8 of the stamp drive 2 is mounted telescopically so that the piston 22 and the Cylinder 24 are slidable relative to each other.
- the cylinder 24 is at its lower end with a hold-down 30 in Form of a mouthpiece firmly connected, in which the stamp 10 is slidably guided and that for holding down (prestressing) the workpieces A, B on the die M serves.
- the cylinder 24 consists of an outer sleeve 26 which is on an upper portion the piston rod 8 is slidably guided, and an inner sleeve 28 which a lower portion of the piston rod 8 is slidably such that between the piston 22, the inner wall of the sleeve 24 and the front end of the Sleeve 28 a pressure chamber 32 is formed.
- the pressure chamber 32 of the hold-down drive 20 is via a flow connection 34 connected to the working chamber 14 of the stamp drive 2.
- the - Always open - flow connection 34 consists of a in the piston rod 8 centrally arranged, longitudinal flow channel 36, the branch channels 38 with the working chamber 8 and via branch channels 40 with the pressure chamber 32 connected is.
- connection 18 is via a pressure relief valve 40 connectable to a low pressure area (tank, not shown), in order to limit the pressure in the working chamber 8 and thus in the pressure chamber 32, as will be explained in more detail.
- the pressure relief valve 40 acts it is preferably a controllable pressure relief valve, the Limit value can be set manually, for example.
- a check valve 44 through a bypass line 42 to the Pressure relief valve 40 connected in parallel to supply the port 18 with pressure to be able, as will also be explained in more detail.
- the hold-down device presses 30 the workpieces A, B against the die M with a uniform hold-down force, the size of which through the flow connection 34 to the Pressure chamber 32 transmitted, limited by the pressure relief valve 40 Pressure is determined.
- the piston 6 moves with its piston rod 8 and the stamp 10 attached to it further down to finally complete the joining process perform (Fig. 3).
- this further downward movement there is a Relative displacement between the piston provided on the piston rod 8 22 and the cylinder 24 supported on the workpieces A, B of the hold-down drive 20.
- This causes pressure medium from the pressure chamber 32 via the flow connection 34, the working chamber 8 and the port 18 through the pressure relief valve 40 displaced through to the low pressure area.
- the pressure relief valve 40 ensures that the hold-down 30 on the workpieces A, B maintain hold-down force unchanged remains.
- the working chamber 12 is connected 16 relieved of pressure and the working chamber 8 via the connection 18 with pressure supplied so that the piston 6 with the piston rod 8 and the stamp 10 is reset are (Fig. 4).
- the working chamber 8 and the flow connection 34 also the pressure chamber 32 again with hydraulic fluid filled until the drive device again its basic position shown in Fig. 1 occupies.
- the piston rod 8 has in the area of the working chamber 14 an outer diameter that is only slightly smaller than the inner diameter of the cylinder 4 is.
- the displacement volume and the cross-sectional area the working chamber 4 are therefore very small. This ensures that the reaction force caused by the pressure in the working chamber, that of the piston 6 must overcome the punch drive 2 in its feed movement, comparatively is low.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Press Drives And Press Lines (AREA)
- Actuator (AREA)
- Jigs For Machine Tools (AREA)
- Automatic Assembly (AREA)
- Punching Or Piercing (AREA)
Description
Die vorliegende Erfindung betrifft eine hydraulische Antriebseinrichtung für ein Werkzeug zum Fügen mindestens zweier Werkstücke aus duktilem Material gemäß dem Oberbegriff des Patentanspruchs 1, insbesondere zum Stanznieten oder Durchsetzfügen (Clinchen).The present invention relates to a hydraulic drive device for a tool for joining at least two workpieces made of ductile material according to the preamble of claim 1, especially for punch riveting or clinching.
Derartige Antriebseinrichtungen (siehe z.B. EP 0 675 774 B1) setzen sich üblicherweise aus einem Stempelantrieb zum Betätigen eines Stempels für den Fügevorgang und einem Niederhalterantrieb zum Betätigen eines die Werkstücke während des Fügevorgangs einspannenden Niederhalters zusammen. Beide Antriebe sind als Kolben-Zylinder-Einheit ausgebildet, wobei die Zylinder der beiden Antriebe fest miteinander verbunden sind und der Kolben des Niederhalterantriebes zwischen der Kolbenstange des Stempelantriebes und dem Zylinder des Niederhalterantriebes konzentrisch so angeordnet ist, daß er über eine Druckkammer mit einem eigenen Druckmittelanschluß zum Erzeugen der Niederhaltekraft teleskopisch verschiebbar ist. Wenn auch zum Zurückstellen des Kolbens des Niederhalterantriebes üblicherweise eine Feder eingesetzt wird, sind jedoch insgesamt drei Druckmittelanschlüsse (zwei für den Stempelantrieb und einer für den Niederhalterantrieb) erforderlich, was die Antriebseinrichtung und insbesondere ihre hydraulische Versorgung vergleichsweise aufwendig macht.Such drive devices (see e.g. EP 0 675 774 B1) settle usually from a stamp drive for actuating a stamp for the joining process and a hold-down drive for actuating the workpieces during of the holding-down clamp. Both drives are designed as a piston-cylinder unit, the cylinders of the two drives are firmly connected and the piston of the hold-down drive between the piston rod of the punch drive and the cylinder of the hold-down drive is arranged concentrically so that it has a pressure chamber with a own pressure medium connection to generate the hold-down force telescopically is movable. If also to reset the piston of the hold-down drive Usually a spring is used, but there are a total of three pressure medium connections (two for the punch drive and one for the hold-down drive) required what the drive device and in particular its hydraulic supply comparatively expensive.
Es ist auch bereits vorgeschlagen worden, die Niederhaltekraft über eine am Kolben des Stempelantriebes abgestützte Feder aufzubringen. Hierdurch vereinfacht sich zwar der Aufbau der Antriebseinrichtung und insbesondere ihre Hydraulikversorgung. Bei dieser Einrichtung ist es jedoch nicht möglich, eine gleichförmige Niederhaltekraft zu erzeugen, da sich die Federkraft mit dem Hub des Stempels ändert.It has also already been proposed to use the hold-down force on a Apply the spring-supported piston to the piston drive. This simplifies the structure of the drive device and in particular its hydraulic supply. With this device, however, it is not possible to have a uniform one Generate hold-down force because the spring force changes with the stroke of the punch.
Der vorliegenden Erfindung liegt die Aufgabe zugrunde, eine hydraulische Antriebseinrichtung für ein Werkzeug zum Fügen mindestens zweier Werkstücke aus duktilem Material zu schaffen, die einen möglichst einfachen Aufbau hat und dennoch die Erzeugung einer gleichförmigen hydraulischen Niederhaltekraft zum Einspannen der Werkstücke ermöglicht.The present invention has for its object a hydraulic Drive device for a tool for joining at least two workpieces to create from ductile material that has the simplest possible structure and nevertheless the generation of a uniform hydraulic hold-down force for The workpieces can be clamped.
Diese Aufgabe wird durch die in Patentanspruch 1 definierte Antriebseinrichtung gelöst.This object is achieved by the drive device defined in claim 1 solved.
Gemäß der Erfindung wird somit der Niederhalterantrieb von der Kolbenstange des Stempelantriebs getragen, und die Druckkammer des Niederhalterantriebs ist mit der einen Arbeitskammer des Stempelantriebes verbunden, so daß zum Erzeugen der Niederhaltekraft Druck aus dieser Arbeitskammer auf die Druckkammer des Niederhalterantriebes übertragen wird.According to the invention, the hold-down drive from the piston rod of the punch drive, and the pressure chamber of the hold-down drive is connected to a working chamber of the stamp drive, so that Generate the hold-down force from this working chamber to the pressure chamber of the hold-down drive is transmitted.
Zweckmäßigerweise ist der Anschluß der betreffenden Arbeitskammer des Stempelantriebes über ein Druckbegrenzungsventil mit einem Niederdruckbereich verbindbar, um den Druck in der Druckkammer des Niederhalteantriebes und damit die Niederhaltekraft auf einen einstellbaren Wert zu begrenzen.The connection of the relevant working chamber is expedient Stamp drive via a pressure relief valve with a low pressure range connectable to the pressure in the pressure chamber of the hold-down drive and thus limit the hold-down force to an adjustable value.
Da somit die Niederhaltekraft über den Druck in der einen Arbeitskammer des Stempelantriebes erzeugt wird, sind nur zwei Anschlüsse zur hydraulischen Versorgung der gesamten Antriebseinrichtung erforderlich. Ein weiterer Vorteil der Erfindung besteht darin, daß zum Vergrößern des Zustellhubes von Niederhalter und Stempel lediglich der Stempelantrieb verlängert werden muß, da sich dann für den vom Stempelantrieb getragenen Niederhalterantrieb automatisch eine entsprechende Verlängerung des Zustellhubes ergibt. Hierdurch ergeben sich insgesamt eine leichtere Handhabung und ein verbesserter Zugang zu der Antriebseinrichtung. Die erfindungsgemäß ausgebildete Antriebseinrichtung zeichnet sich im übrigen durch vergleichsweise geringe Herstellungskosten aus, die durch den vereinfachten Aufbau, die geringere Anzahl von hubabhängigen Einzelteilen und eine einfachere Hydraulikversorgung bedingt sind.As a result, the hold-down force over the pressure in one working chamber of the punch drive are only two connections to the hydraulic Supply of the entire drive device required. Another advantage of Invention is that to increase the feed stroke of hold-down and stamp only the stamp drive must be extended, since then for the hold-down drive carried by the punch drive automatically has a corresponding one Extension of the delivery stroke results. This results overall easier handling and improved access to the drive device. The drive device designed according to the invention is also distinguished by comparatively low manufacturing costs, which by the simplified Structure, the smaller number of stroke-dependent individual parts and a simpler one Hydraulic supply are conditional.
Vorteilhafte Ausgestaltungen der Erfindung sind in den Unteransprüchen definiert. Advantageous embodiments of the invention are in the subclaims Are defined.
Anhand der Zeichnungen wird ein Ausführungsbeispiel der Erfindung näher erläutert. Die Figuren 1 bis 4 stellen jeweils einen Längsschnitt durch eine hydraulische Antriebseinrichtung in unterschiedlichen Betriebszuständen dar.On the basis of the drawings, an embodiment of the invention is closer explained. Figures 1 to 4 each represent a longitudinal section through a hydraulic Drive device in different operating states.
Die in den Figuren dargestellte Antriebseinrichtung dient zum Stanznieten zweier plattenförmiger Werkstücke A, B, die auf einer Matrize M abgestützt sind. Die Antriebseinrichtung kann jedoch auch für andere Fügevorgänge wie z.B. zum Durchsetzfügen (Clinchen) oder ganz allgemein zum Bearbeiten von Werkstücken mittels eines Stempels wie z.B. beim Stanzen eingesetzt werden.The drive device shown in the figures is used for punch riveting two plate-shaped workpieces A, B, which are supported on a die M. However, the drive device can also be used for other joining processes, e.g. to the Clinching or in general for machining workpieces by means of a stamp such as used in punching.
Die Antriebseinrichtung hat einen Stempelantrieb 2 in Form einer Kolben-Zylinder-Einheit
mit einem Zylinder 4, der beispielsweise an einem C-Rahmen
(nicht gezeigt) fest angebracht ist. In dem Zylinder 4 ist ein Kolben 6 mit einer Kolbenstange
8 gleitend verschiebbar gelagert. Der Kolben 6 unterteilt den Innenraum
des Zylinders 4 in eine erste Arbeitskammer 12 und eine zweite Arbeitskammer 14,
die jeweils über einen eigenen Anschluß 16 bzw. 18 mit einer hydraulischen
Druckmittelquelle (nicht gezeigt) verbindbar sind.The drive device has a
Die Kolbenstange 8 ist an ihrem unteren Ende mit einem Stempel 10 fest
verbunden, der im dargestellten Ausführungsbeispiel zum Durchführen des Nietvorganges
dient.The
Die Kolbenstange 8 des Stempelantriebs 2 trägt freitragend einen Niederhalterantrieb
20, der ebenfalls als Kolben-Zylinder-Einheit ausgebildet ist. Genauer
gesagt, hat der Niederhalterantrieb 20 einen Kolben 22, der an der Kolbenstange 8
einstückig angeformt, also mit der Kolbenstange 8 fest verbunden ist. Der Niederhalterantrieb
20 hat ferner einen Zylinder 24, der auf der Kolbenstange 8 des Stempelantriebes
2 teleskopisch verschiebbar gelagert ist, so daß der Kolben 22 und der
Zylinder 24 relativ zueinander gleitend verschiebbar sind.The
Der Zylinder 24 ist an seinem unteren Ende mit einem Niederhalter 30 in
Form eines Mundstückes fest verbunden, in dem der Stempel 10 gleitend geführt ist
und das zum Niederhalten (Vorspannen) der Werkstücke A, B an der Matrize M
dient. The
Der Zylinder 24 besteht aus einer äußeren Hülse 26, die an einem oberen Abschnitt
der Kolbenstange 8 gleitend geführt ist, und einer inneren Hülse 28, die auf
einem unteren Abschnitt der Kolbenstange 8 gleitend geführt ist, derart, daß zwischen
dem Kolben 22, der Innenwand der Hülse 24 und dem stimseitigen Ende der
Hülse 28 eine Druckkammer 32 gebildet wird.The
Die Druckkammer 32 des Niederhalterantriebes 20 ist über eine Strömungsverbindung
34 mit der Arbeitskammer 14 des Stempelantriebes 2 verbunden. Die
- ständig offene - Strömungsverbindung 34 besteht aus einem in der Kolbenstange 8
mittig angeordneten, längsverlaufenden Strömungskanal 36, der über Zweigkanäle
38 mit der Arbeitskammer 8 und über Zweigkanäle 40 mit der Druckkammer 32
verbunden ist.The
Wie in Fig. 1 schematisch angedeutet, ist der Anschluß 18 über ein Druckbegrenzungsventil
40 mit einem Niederdruckbereich (Tank, nicht gezeigt) verbindbar,
um den Druck in der Arbeitskammer 8 und damit in der Druckkammer 32 zu begrenzen,
wie noch genauer erläutert wird. Bei dem Druckbegrenzungsventil 40 handelt
es sich vorzugsweise um ein steuerbares Druckbegrenzungsventil, dessen
Grenzwert beispielsweise manuell eingestellt werden kann. Wie ebenfalls schematisch
angedeutet, ist ein Rückschlagventil 44 durch eine Bypassleitung 42 zu dem
Druckbegrenzungsventil 40 parallel geschaltet, um den Anschluß 18 mit Druck versorgen
zu können, wie ebenfalls noch genauer erläutert wird.As indicated schematically in Fig. 1, the
Die Betriebsweise der beschriebenen Antriebseinrichtung ist wie folgt:
Trifft bei der Abwärtsbewegung des Kolbens 6 und des Niederhalterantriebs
20 der Niederhalter 30 auf die Werkstücke A, B auf (Fig. 2), so drückt der Niederhalter
30 die Werkstücke A, B gegen die Matrize M mit einer gleichförmigen Niederhaltekraft,
deren Größe durch den über die Strömungsverbindung 34 auf die
Druckkammer 32 übertragenen, von dem Druckbegrenzungsventil 40 begrenzten
Druck bestimmt wird.Strikes during the downward movement of the
Gleichzeitig bewegt sich der Kolben 6 mit seiner Kolbenstange 8 und dem
daran befestigten Stempel 10 weiter nach unten, um schließlich den Fügevorgang
auszuführen (Fig. 3). Während dieser weiteren Abwärtsbewegung kommt es zu einer
Relativverschiebung zwischen dem an der Kolbenstange 8 vorgesehenen Kolben
22 und dem an den Werkstücken A, B abgestützten Zylinder 24 des Niederhalterantriebes
20. Hierdurch wird Druckmittel aus der Druckkammer 32 über die Strömungsverbindung
34, die Arbeitskammer 8 und den Anschluß 18 durch das Druckbegrenzungsventil
40 hindurch zum Niederdruckbereich verdrängt. Während dieser
Zeit sorgt das Druckbegrenzungsventil 40 dafür, daß die vom Niederhalter 30 auf
die Werkstücke A, B ausgeübte Niederhaltekraft unverändert aufrechterhalten
bleibt.At the same time, the
Wenn der Fügevorgang beendet ist, wird die Arbeitskammer 12 über den Anschluß
16 druckentlastet und die Arbeitskammer 8 über den Anschluß 18 mit Druck
versorgt, so daß der Kolben 6 mit der Kolbenstange 8 und dem Stempel 10 zurückgestellt
werden (Fig. 4). Hierbei werden die Arbeitskammer 8 und über die Strömungsverbindung
34 auch die Druckkammer 32 wieder mit Hydraulikflüssigkeit
gefüllt, bis die Antriebseinrichtung wieder ihre in Fig. 1 gezeigte Grundstellung
einnimmt.When the joining process is complete, the
Wie in den Figuren gezeigt, hat die Kolbenstange 8 im Bereich der Arbeitskammer
14 einen Außendurchmesser, der nur geringfügig kleiner als der Innendurchmesser
des Zylinders 4 ist. Das Verdrängungsvolumen und die Querschnittsfläche
der Arbeitskammer 4 sind daher sehr klein. Hierdurch wird sichergestellt, daß
die durch den Druck in der Arbeitskammer bedingte Reaktionskraft, die der Kolben
6 des Stempelantriebes 2 bei seiner Zustellbewegung überwinden muß, vergleichsweise
gering ist.As shown in the figures, the
Claims (7)
- A hydraulic drive mechanism for a tool for joining at least two workpieces of ductile material, comprising
a punch drive (2) for actuating a punch (10) to exert a joining force, said punch drive (2) comprising a piston cylinder assembly including first and second work chambers (12, 14), the first work chamber (12) being pressurized via a first fluid connection (16) to move said punch (10) from an inoperative position to an operative position and the second work chamber (14) being pressurized via a second fluid connection (18) to return said punch (10), and
a clamp drive (20) for actuating a clamp means providing a clamping force for clamping said at least two workpieces (A, B) during the joining operation, said clamp drive (20) comprising a piston cylinder assembly including a pressure chamber (32) which is pressurized for generating said clamping force,
characterized in that the piston cylinder assembly of said clamp drive (20) is carried by the piston rod (8) of said punch drive (2), and
said pressure chamber (32) of said clamp drive (20) communicate with said second work chamber (14) of said punch drive (2) via a flow passage (34) such that pressure from said second work chamber (14) of said punch drive (20) is transmitted to said pressure chamber (32) of said clamp drive (20) in order to generate said clamping force. - The hydraulic drive mechanism of claim 1 characterized in that the fluid connection (18) of said second work chamber (14) of said punch drive (2) is arranged to communicate with a low pressure region via a pressure limiting valve (40) in order to limit, via said flow passage (34), the pressure within said pressure chamber (32) of said clamp drive (20) to thereby limit the clamping force.
- The hydraulic drive mechanism of claim 1 or claim 2 characterized in that the piston (22) of the clamp drive (20) is fixedly connected to the piston rod (8) of the punch drive (2), and the cylinder (24) of the clamp drive (20) is mounted on the piston rod (8) of the punch drive (2) so as to be telescopically displaceable thereon.
- The hydraulic drive mechanism of claim 3 characterized in that said clamp means (30) is fixedly connected to the cylinder (24) of said clamp drive (20).
- The hydraulic drive mechanism of any of the preceding claims characterized in that said flow passage (34) comprises a longitudinal bore (36) extending through the piston rod (8) of said punch drive (2) and a plurality of branched bores (38, 40) branched-off from said longitudinal bore and opening into said second work chamber (8) and, respectively, said pressure chamber (32).
- The hydraulic drive mechanism of any of the preceding claims characterized in that the clamp drive (20) has a piston (22) integral with the piston rod (8) of said punch drive (2).
- The hydraulic drive mechanism of any of the preceding claims characterized in that the piston rod (8) of said punch drive (2) has an outer diameter which, in the area of said second work chamber, is only slightly smaller than the inner diameter of the cylinder (4) of said punch drive (2).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19924310 | 1999-05-27 | ||
| DE19924310A DE19924310B4 (en) | 1999-05-27 | 1999-05-27 | Hydraulic drive device for a joining tool |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP1055466A2 EP1055466A2 (en) | 2000-11-29 |
| EP1055466A3 EP1055466A3 (en) | 2002-07-24 |
| EP1055466B1 true EP1055466B1 (en) | 2004-07-21 |
Family
ID=7909359
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP00110295A Expired - Lifetime EP1055466B1 (en) | 1999-05-27 | 2000-05-23 | Hydraulic drive unit for an assembling tool |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US6398096B1 (en) |
| EP (1) | EP1055466B1 (en) |
| DE (2) | DE19924310B4 (en) |
| ES (1) | ES2224962T3 (en) |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10031073B4 (en) * | 2000-06-30 | 2016-11-24 | Gustav Klauke Gmbh | Method of riveting |
| US20060251495A1 (en) * | 2001-03-09 | 2006-11-09 | Reinhold Opper | Self-piercing rivet, process and device for setting a rivet element, and employment thereof |
| JP4071634B2 (en) * | 2001-03-09 | 2008-04-02 | ニューフレイ リミテッド ライアビリティ カンパニー | Automatic drilling rivet, method and apparatus for attaching rivet elements, and use thereof |
| DE20106207U1 (en) * | 2001-04-09 | 2001-06-21 | Boellhoff Gmbh | Drive device for a press tool |
| ITTO20010659A1 (en) * | 2001-07-06 | 2003-01-06 | Comau Spa | INTEGRATED LOCKING AND CLAMPING DEVICE, PARTICULARLY FOR THE JOINTING OF METAL SHEET PANELS AND SIMILAR. |
| JP2004060855A (en) * | 2002-07-31 | 2004-02-26 | Nippon Pop Rivets & Fasteners Ltd | Self piercing rivet |
| DE102004005884B4 (en) | 2004-02-05 | 2012-03-29 | Newfrey Llc | Joining device with a punch tool and a counter tool and a holder |
| DE102005031917A1 (en) | 2004-09-24 | 2006-04-13 | Böllhoff Verbindungstechnik GmbH | Method for joining and device for actuating a joining tool |
| DE102005041534A1 (en) | 2005-08-31 | 2007-03-01 | Newfrey Llc, Newark | Supplying connecting elements, e.g. rivets or screws, to processing apparatus, involves two-stage conveyance via intermediate reservoir, allowing rapid, reliable interchange of different types of elements |
| SK932007A3 (en) * | 2007-07-09 | 2009-02-05 | Konek, S. R. O. | Hydraulic scarified hammer |
| DE102009034542B4 (en) * | 2008-07-23 | 2017-05-24 | Richard Bergner Verbindungstechnik Gmbh & Co. Kg | Machining unit and method for machining a workpiece with a machining tool |
| DE102011002058A1 (en) * | 2011-04-14 | 2012-10-18 | Böllhoff Verbindungstechnik GmbH | Hydraulically operated setting device with a hydraulic unit and a joining method for connecting at least two components |
| 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 |
| DE102021104620B4 (en) | 2021-02-26 | 2023-12-07 | Dieter Schmidt | Power unit for a processing station for machining and/or processing workpieces and associated processing station |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4096727A (en) * | 1976-04-29 | 1978-06-27 | Daniel Pierre Gargaillo | Punching, stamping and rivetting apparatus |
| US4516448A (en) * | 1982-09-07 | 1985-05-14 | Houdaille Industries, Inc. | Punch and ram assembly for punch press |
| GB9211785D0 (en) * | 1992-06-04 | 1992-07-15 | Ariel Ind Plc | Improved design of fastener application machine |
| GB9226517D0 (en) * | 1992-12-19 | 1993-02-10 | Henrob Ltd | Improvements in or relating to sefl-piercing riveting |
| SE9303824L (en) * | 1993-11-18 | 1994-10-10 | Pressmaster Tool Ab | Process for operating a hydraulic working tool and device for carrying out the process |
| US6276050B1 (en) * | 1998-07-20 | 2001-08-21 | Emhart Inc. | Riveting system and process for forming a riveted joint |
| EP0893178B1 (en) * | 1997-07-26 | 2003-04-09 | Kerb-Konus-Vertriebs-GmbH | Punching and stamping tool |
| DE19752367A1 (en) * | 1997-11-26 | 1999-05-27 | Emhart Inc | Production method for producing punched rivet connection especially for car industry |
-
1999
- 1999-05-27 DE DE19924310A patent/DE19924310B4/en not_active Expired - Fee Related
-
2000
- 2000-05-23 ES ES00110295T patent/ES2224962T3/en not_active Expired - Lifetime
- 2000-05-23 EP EP00110295A patent/EP1055466B1/en not_active Expired - Lifetime
- 2000-05-23 DE DE50007105T patent/DE50007105D1/en not_active Expired - Fee Related
- 2000-05-26 US US09/579,802 patent/US6398096B1/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| EP1055466A3 (en) | 2002-07-24 |
| DE19924310A1 (en) | 2000-11-30 |
| DE50007105D1 (en) | 2004-08-26 |
| ES2224962T3 (en) | 2005-03-16 |
| DE19924310B4 (en) | 2007-11-22 |
| EP1055466A2 (en) | 2000-11-29 |
| US6398096B1 (en) | 2002-06-04 |
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