EP1281479B1 - Clamping element with hydraulically operated sliders - Google Patents

Clamping element with hydraulically operated sliders Download PDF

Info

Publication number
EP1281479B1
EP1281479B1 EP02102029.2A EP02102029A EP1281479B1 EP 1281479 B1 EP1281479 B1 EP 1281479B1 EP 02102029 A EP02102029 A EP 02102029A EP 1281479 B1 EP1281479 B1 EP 1281479B1
Authority
EP
European Patent Office
Prior art keywords
slides
workpiece
clamping
housing
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
Application number
EP02102029.2A
Other languages
German (de)
French (fr)
Other versions
EP1281479A3 (en
EP1281479A2 (en
Inventor
Rudolf Kohlert
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.)
Ludwig Ehrhardt GmbH
Original Assignee
Ludwig Ehrhardt GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ludwig Ehrhardt GmbH filed Critical Ludwig Ehrhardt GmbH
Publication of EP1281479A2 publication Critical patent/EP1281479A2/en
Publication of EP1281479A3 publication Critical patent/EP1281479A3/en
Application granted granted Critical
Publication of EP1281479B1 publication Critical patent/EP1281479B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B1/00—Vices
    • B25B1/06—Arrangements for positively actuating jaws
    • B25B1/18—Arrangements for positively actuating jaws motor driven, e.g. with fluid drive, with or without provision for manual actuation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B5/00—Clamps
    • B25B5/06—Arrangements for positively actuating jaws
    • B25B5/061—Arrangements for positively actuating jaws with fluid drive

Definitions

  • the invention relates to a clamping element for clamping workpieces, which are already accommodated in their position and positioned where a supportive receptacle is required at any point, with the aid of jaws which are mounted on the workpiece approachable and fixable and mounted on two parallel slide , which are slidably guided in guideways.
  • Such a clamping element is made DE 201 00 104 U1 known.
  • clamping elements For clamping workpieces clamping elements are used, which fix the workpiece positioned. Labile and longer workpieces require further clamping units, by means of which they are definitely supported at all critical points. These clamping elements must be applied to the workpiece, after this is already fixed in its position. The introduction of such clamping units must be done so that the workpiece at the points where the clamping units come to rest, is not distorted or deformed. This high demands are placed on such clamping elements.
  • Clamping elements are usually operated hydraulically.
  • the hydraulic pressure is introduced so that the clamping element moves its clamping jaws toward or away from each other.
  • Inconsistencies in the hydraulics or in the friction surfaces, which affect the moving parts, can easily lead to tension of the workpieces.
  • unstable points on a wide range of workpieces should be stabilized with one element.
  • the invention is thus a clamping element with two flexible movable, parallel sliders on which the jaws are placed.
  • the clamping jaws are positionally flexible in the manner of tongs to the workpiece.
  • two equally large opposing contact forces act on two opposite points on the workpiece.
  • the slide 2 u. 3 are provided in the lower region of their contact surfaces with a dovetail-shaped recess 6.
  • the jaws 7 u. 8 attached on the sliders 2 u. 3, the jaws 7 u. 8 attached. These clamping jaws are interchangeable and thus adaptable to the respective workpiece. They can be fixed by means of screws 13 and 10 nuts.
  • the slide 2 u. 3 are hydraulically driven, via the plunger 9 u. 10 for clamping and by means of plunger 11 u. 12 to relax.
  • the plunger 9 u. 10 are in the piston plates 15; 16 arranged so that the force emanating from them directly on the end faces 17; 18, the slider 2; 3 is initiated in this.
  • the line of action of the plunger 9, 10 for the slides 2, 3 lies in the guide surfaces within the recesses 4, 5. It is thus a pure longitudinal force introduced without lateral moments, thereby the friction force in the guide surfaces is significantly reduced.
  • the slides run smoothly and evenly in their guide surfaces and transmit the force directly to the clamping point 19 and the workpiece 20 without deforming them.
  • the result is the workpiece 20 equal oppositely directed forces according to the principle action equal reaction.
  • the resulting load moment - clamping force x lever arm a - is determined by the guide surfaces within the recess 4; 5 recorded, wherein the recess 4; 5 corresponds with their guide surfaces in about the case length. These relatively large guide surfaces help to keep the friction forces as low as possible.
  • a piston 22 is provided for fixing below the recess 4; This piston 22 is driven separately. It is provided at its head end with a dovetail-shaped wedge piece 23, which is fitted exactly in a recessed in the slide 2, 3 recess 6, in such a way that in the relaxed state, the slide 2; 3 slide past the wedge piece 23 without contact. The slide is guided at its contact surfaces in the recesses 6. The piston 22 is acted upon via the hydraulic connection 25. Its return takes place by means of associated plate springs 24. The provision can be made hydraulically if necessary.
  • the piston 22 is acted upon by hydraulic connection 25.
  • This piston is pulled down into the housing 1.
  • the trained as a wedge piece 23 head is pulled down in the recess 6 and this presses on the side surfaces of the recess 6.
  • the clamping element is set so that it remains independent of external forces as well as pressure drop in the hydraulic in its position and thus acts self-locking, this is effected by the configuration of the wedge piece 23.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jigs For Machine Tools (AREA)

Description

Die Erfindung betrifft ein Spannelement zum Spannen von Werkstücken, die bereits in ihrer positionierten Lage aufgenommen sind und bei denen an beliebigen Stellen eine unterstützende Aufnahme erforderlich ist, mit Hilfe von Spannbacken, die an das Werkstück heranfahrbar und festsetzbar sowie auf zwei parallel geführte Schieber aufgesetzt sind, welche in Führungsbahnen gleitend geführt sind.The invention relates to a clamping element for clamping workpieces, which are already accommodated in their position and positioned where a supportive receptacle is required at any point, with the aid of jaws which are mounted on the workpiece approachable and fixable and mounted on two parallel slide , which are slidably guided in guideways.

Ein solches Spannelement ist aus DE 201 00 104 U1 bekannt.Such a clamping element is made DE 201 00 104 U1 known.

Zum Spannen von Werkstücken werden Spannelemente verwendet, die das Werkstück positioniert festsetzen. Labile und längere Werkstücke bedürfen weiterer Spanneinheiten, mittels derer sie an allen kritischen Punkten Lage bestimmt unterstützt werden. Diese Spannelemente müssen an das Werkstück angelegt werden, nachdem dieses bereits in seiner Position festgesetzt ist. Das Heranführen solcher Spanneinheiten muss so erfolgen, dass das Werkstück an den Stellen an denen die Spanneinheiten zur Anlage kommen, nicht verspannt oder verformt wird. Damit sind an solche Spannelemente hohe Anforderungen gestellt.For clamping workpieces clamping elements are used, which fix the workpiece positioned. Labile and longer workpieces require further clamping units, by means of which they are definitely supported at all critical points. These clamping elements must be applied to the workpiece, after this is already fixed in its position. The introduction of such clamping units must be done so that the workpiece at the points where the clamping units come to rest, is not distorted or deformed. This high demands are placed on such clamping elements.

Spannelemente werden in der Regel hydraulisch betätigt. Der hydraulische Druck wird so eingeleitet, dass das Spannelement seine Spannbacken aufeinander zu oder voneinander weg bewegt. Unstimmigkeiten in der Hydraulik oder in den Reibungsflächen, die sich auf die beweglichen Teile auswirken, können leicht zu Verspannungen der Werkstücke führen.Clamping elements are usually operated hydraulically. The hydraulic pressure is introduced so that the clamping element moves its clamping jaws toward or away from each other. Inconsistencies in the hydraulics or in the friction surfaces, which affect the moving parts, can easily lead to tension of the workpieces.

Die bekannten Spannelemente erfüllen diese Forderungen nicht in allen Fällen. Meist werden Sonderlösungen, d.h. dem jeweiligen Anwendungsfall angepasste Einheiten, bevorzugt - Prospekt Römheld Spannsysteme H 4.307 Ausgabe 9-95 -. Das führt zu einer Vielzahl von Bauelementen.The known clamping elements do not meet these requirements in all cases. Usually special solutions, i. units adapted to the respective application, preferred - Prospekt Römheld Spannsysteme H 4.307 Edition 9-95 -. This leads to a variety of components.

Das aus der DE 201 00 104 U1 bekannte Spannelement weißt zwei parallel zueinander geführte und zueinander hin bzw. voneinander weg bewegbare Schieber auf. Das Spannelement ist dabei so ausgebildet, dass die Schieben voneinander entkoppelt, also unabhängig voneinander ansteuerbar sind. Eine zusätzliche Unterstützung eines bereits gespannten Werkstücks ist damit nicht möglich.That from the DE 201 00 104 U1 known clamping element know two parallel to each other and towards each other or away from each other movable slide on. The clamping element is designed so that the slides decoupled from each other, so are independently controllable. An additional support of an already clamped workpiece is thus not possible.

Es ist daher Aufgabe der Erfindung ein Spannelement so zu gestalten, dass es universell einsetzbar ist, sich selbsttätig allen Gegebenheiten anpasst und darüber hinaus im Spannzustand, unabhängig von äußeren Einflüssen, wie z.B. Druckabfall in der Leitung, seine Spannstellung beibehält. Darüber hinaus sollen labile Stellen an den unterschiedlichsten Werkstücken, mit einem Element stabilisiert werden.It is therefore an object of the invention to design a clamping element so that it is universally applicable, automatically adapts to all conditions and beyond in the clamping state, regardless of external influences, such. Pressure drop in the line, maintains its clamping position. In addition, unstable points on a wide range of workpieces should be stabilized with one element.

Zur Lösung dieses Problems ist das erfindungsgemäße Spannelement durch folgende Merkmale gekennzeichnet:

  1. a) die Führungsbahnen sind in Aussparungen des Gehäuses eingelassen,
  2. b) die Krafteinleitung zur Bewegung der Schieber erfolgt über Plungerkolben, die auf die Stirnseiten der Schieber einwirken und damit einen kurzen Hebelarm zwischen Krafteinleitung und Kraftauswirkung bilden,
  3. c) die Plungerkolben sind in Kolbenplatten des Gehäuses angeordnet und werden über den gleichen Hydraulikanschluss beaufschlagt
  4. d) in dem Gehäuse ist unterhalb der Schieber ein senkrecht zur Schieberebene wirkender Kolben eingebracht,
  5. e) die Schieber sind mit einer Ausnehmung versehen, die keilförmig verläuft,
  6. f) der Kolben ist am Kopf mit einem Keilstück versehen, das in der Ausnehmung der Schieber gleitend geführt ist,
  7. g) im Spannzustand sind die Schieber mit ihren am Werkstück anliegenden Spannbacken festsetzbar, indem der Kolben mit Druck beaufschlagt, nach unten in das Gehäuse gezogen wird und damit das Keilstück an seinem Kopf in die Ausnehmung zieht, diese spreizt und die Schieber in die Führungsflächen der Aussparungen presst.
To solve this problem, the clamping element according to the invention is characterized by the following features:
  1. a) the guideways are embedded in recesses of the housing,
  2. b) the introduction of force to move the slide takes place via plunger, which act on the end faces of the slide and thus form a short lever arm between force application and force impact,
  3. c) the plungers are arranged in piston plates of the housing and are acted upon by the same hydraulic connection
  4. d) in the housing, a piston acting perpendicular to the slide plane is introduced below the slides,
  5. e) the slides are provided with a recess which runs wedge-shaped,
  6. f) the piston is provided on the head with a wedge piece, which is slidably guided in the recess of the slide,
  7. g) in the clamping state, the slide can be fixed with their voltage applied to the workpiece jaws by the piston pressurized, is pulled down into the housing and thus pulls the wedge piece on his head in the recess, this spreads and the slide in the guide surfaces of Recesses pressed.

Der Erfindung liegt somit ein Spannelement mit zwei flexibel beweglichen, parallel angeordneten Schiebern zugrunde auf denen die Spannbacken aufgesetzt sind. Beim Spannvorgang legen sich die Spannbacken positionsflexibel zangenartig an das Werkstück an. Damit wirken zwei gleich große entgegengerichtete Berührungskräfte an zwei gegenüberliegenden Punkten auf das Werkstück ein. Diese beiden Berührungskräfte heben sich in ihrer Wirkung nach dem Prinzip Aktion gleich Reaktion auf und führen damit nicht zu Verformungen oder Verspannungen des Werkstückes.The invention is thus a clamping element with two flexible movable, parallel sliders on which the jaws are placed. During the clamping process, the clamping jaws are positionally flexible in the manner of tongs to the workpiece. Thus, two equally large opposing contact forces act on two opposite points on the workpiece. These two contact forces are equal in their effect according to the principle of action Reaction and thus do not lead to deformation or distortion of the workpiece.

Die Lösung der Aufgabe ist den kennzeichnenden Merkmalen der Ansprüche zu entnehmen..The solution of the problem is to be taken from the characterizing features of the claims.

In den Fig. Ist die Erfindung näher beschrieben.

Fig. 1
zeigt die Frontansicht
Fig. 2
zeigt die Seitenansicht
Fig. 3
zeigt eine Draufsicht
Fig. 4
zeigt den Schnitt B-B
Fig. 5
zeigt den Schnitt A-A
In the figures, the invention is described in detail.
Fig. 1
shows the front view
Fig. 2
shows the side view
Fig. 3
shows a plan view
Fig. 4
shows the section BB
Fig. 5
shows the section AA

In dem Gehäuse 1 sind zwei parallelgeführte gegenläufige Schieber 2 u. 3 gleitend in Aussparungen 4 u. 5 eingelassen. Die Schieber 2 u. 3 sind im unteren Bereich ihrer Berührungsflächen mit einer schwalbenschwanzförmigen Ausnehmung 6 versehen. Auf den Schiebern 2 u. 3 sind die Spannbacken 7 u. 8 aufgesetzt. Diese Spannbacken sind auswechselbar und somit dem jeweiligen Werkstück anpassbar. Sie können mittels Schrauben 13 und Nutensteinen 14 festgesetzt werden. Die Schieber 2 u. 3 werden hydraulisch angetrieben, und zwar über die Plungerkolben 9 u. 10 zum Spannen und mittels Plungerkolben 11 u. 12 zum Entspannen.In the housing 1, two parallel-guided counter-rotating slide 2 u. 3 sliding in recesses 4 u. 5 taken in. The slide 2 u. 3 are provided in the lower region of their contact surfaces with a dovetail-shaped recess 6. On the sliders 2 u. 3, the jaws 7 u. 8 attached. These clamping jaws are interchangeable and thus adaptable to the respective workpiece. They can be fixed by means of screws 13 and 10 nuts. The slide 2 u. 3 are hydraulically driven, via the plunger 9 u. 10 for clamping and by means of plunger 11 u. 12 to relax.

Die Plungerkolben 9 u. 10 sind in den Kolbenplatten 15; 16 so angeordnet, dass die von ihnen ausgehende Kraft unmittelbar an den Stirnseiten 17; 18 der Schieber 2; 3 in diese eingeleitet wird. Damit liegt die Wirkungslinie der Plungerkolben 9;10 für die Schieber 2;3 in den Führungsflächen innerhalb der Aussparungen 4;5. Es wird damit eine reine Längskraft eingeleitet ohne seitliche Momente, dadurch wird die Reibungskraft in den Führungsflächen erheblich vermindert. Die Schieber laufen leichtgängig und gleichmäßig in ihren Führungsflächen und übertragen die Kraft unmittelbar an die Spannstelle 19 und auf das Werkstück 20 ohne diese zu verformen.The plunger 9 u. 10 are in the piston plates 15; 16 arranged so that the force emanating from them directly on the end faces 17; 18, the slider 2; 3 is initiated in this. Thus, the line of action of the plunger 9, 10 for the slides 2, 3 lies in the guide surfaces within the recesses 4, 5. It is thus a pure longitudinal force introduced without lateral moments, thereby the friction force in the guide surfaces is significantly reduced. The slides run smoothly and evenly in their guide surfaces and transmit the force directly to the clamping point 19 and the workpiece 20 without deforming them.

Es entstehen am Werkstück 20 gleichgroße entgegengesetzt gerichtete Kräfte nach dem Prinzip Aktion gleich Reaktion. Das sich daraus ergebende Lastmoment - Spannkraft x Hebelarm a - wird von den Führungsflächen innerhalb der Aussparung 4; 5 aufgenommen, wobei die Aussparung 4; 5 mit ihren Führungsflächen in etwa der Gehäuselänge entspricht. Diese relativ großen Führungsflächen tragen dazu bei, dass die Reibungskräfte so gering wie möglich gehalten sind.The result is the workpiece 20 equal oppositely directed forces according to the principle action equal reaction. The resulting load moment - clamping force x lever arm a - is determined by the guide surfaces within the recess 4; 5 recorded, wherein the recess 4; 5 corresponds with their guide surfaces in about the case length. These relatively large guide surfaces help to keep the friction forces as low as possible.

In dem Gehäuse 1 ist unterhalb der Aussparung 4;5 ein Kolben 22 zum Festsetzen vorgesehen. Dieser Kolben 22 wird separat angesteuert. Er ist an seinem Kopfende mit einem schwalbenschwanzförmigen Keilstück 23 versehen, das exakt in eine im Schieber 2;3 eingelassene Ausnehmung 6 eingepaßt ist, und zwar so, dass im entspannten Zustand die Schieber 2; 3 an dem Keilstück 23 ohne Berührung vorbeigleiten. Die Führung der Schieber erfolgt an deren Berührungsflächen in den Aussparungen 6. Der Kolben 22 wird über den Hydraulikanschluß 25 beaufschlagt. Seine Rückführung erfolgt mittels ihm zugeordneter Tellerfedern 24. Die Rückstellung kann im Bedarfsfall auch hydraulisch erfolgen.In the housing 1, a piston 22 is provided for fixing below the recess 4; This piston 22 is driven separately. It is provided at its head end with a dovetail-shaped wedge piece 23, which is fitted exactly in a recessed in the slide 2, 3 recess 6, in such a way that in the relaxed state, the slide 2; 3 slide past the wedge piece 23 without contact. The slide is guided at its contact surfaces in the recesses 6. The piston 22 is acted upon via the hydraulic connection 25. Its return takes place by means of associated plate springs 24. The provision can be made hydraulically if necessary.

Zum Spannen sind die Spannbacken 7; 8 auseinandergefahren, so dass das Werkstück 20 zwischen ihnen leicht aufnehmbar ist. Wird der Hydraulikanschluß 21 freigegeben und der Hydraulikanschluß 26 angesteuert, so werden die Plungerkolben 9; 10 beaufschlagt. Damit schieben sich die Schieber 2; 3 mit ihren Spannbacken 7; 8 auf das Werkstück zu. Sobald einer der Spannbacken am Werkstück 20 anliegt, bleibt er infolge des vom Werkstück ausgehenden Widerstandes stehen und es bewegt sich noch der zweite Schieber bis auch sein Spannbacken am Werkstück anliegt. Nunmehr baut sich die Spannkraft gleichmäßig zwischen den Spannbacken auf und setzt das Werkstück fest. Dieses ausgleichende Heranfahren an das Werkstück ist dadurch gegeben, dass beide Schieber 2;3 mit ihren Plungerkolben 9; 10 an dem gleichen Hydraulikanschluß 26 liegen und somit gleichmäßig beaufschlagt sind. Hat sich der Kraftschluß am Werkstück aufgebaut, wird der Kolben 22 über Hydraulikanschluß 25 beaufschlagt. Dieser Kolben wird dabei nach unten in das Gehäuse 1 gezogen. Der als Keilstück 23 ausgebildete Kopf wird in der Ausnehmung 6 herunter gezogen und drückt hierbei auf die Seitenflächen der Ausnehmung 6. Damit werden die Schieber 2; 3 in die Führungsflächen 27;28 der Aussparungen 4; 5 gepreßt und setzen sich fest. Das Spannelement ist so festgesetzt, dass es unabhängig von äusseren Kräften wie auch bei Druckabfall in der Hydraulik in seiner Stellung verharrt und damit selbsthemmend wirkt, dieses wird durch die Ausgestaltung des Keilstücks 23 bewirkt.For clamping the jaws 7; 8 apart, so that the workpiece 20 between them is easily absorbed. If the hydraulic connection 21 is released and the hydraulic connection 26 is activated, the plungers 9; 10 applied. This push the slide 2; 3 with their jaws 7; 8 to the workpiece too. As soon as one of the clamping jaws rests against the workpiece 20, it stops as a result of the resistance emanating from the workpiece and the second slider still moves until its clamping jaw also rests against the workpiece. Now, the clamping force builds up evenly between the jaws and sets the workpiece firmly. This compensatory approach to the workpiece is given by the fact that both slides 2, 3 with their plunger 9; 10 lie on the same hydraulic connection 26 and thus are applied uniformly. If the adhesion has built up on the workpiece, the piston 22 is acted upon by hydraulic connection 25. This piston is pulled down into the housing 1. The trained as a wedge piece 23 head is pulled down in the recess 6 and this presses on the side surfaces of the recess 6. Thus, the slide 2; 3 in the guide surfaces 27, 28 of the recesses 4; 5 pressed and pin down. The clamping element is set so that it remains independent of external forces as well as pressure drop in the hydraulic in its position and thus acts self-locking, this is effected by the configuration of the wedge piece 23.

Zum Entspannen wird zunächst der Kolben 22 drucklos gemacht und durch seine Tellerfedern 24 wieder in die Ausgangslage gebracht. Damit wird der Anpressdruck für die Schieber in der Ausnehmung 6 aufgehoben. Wird nunmehr der Druck im Hydraulikanschluß 26 freigegeben und gleichzeitig Hydraulikanschluß 21 beaufschlagt, so werden die Plungerkolben 11;12 betätigt und die Schieber 2; 3 in ihre Ausgangsposition zurückgefahren, Das Werkstück 20 ist zur Entnahme freigegeben. Bezugszeichen 1 Gehäuse 2 Schieber 3 Schieber 4 Aussparung 5 Aussparung 6 Ausnehmung 7 Spannbacken 8 Spannbacken 9 Plungerkolben spannen 10 Plungerkolben spannen 11 Plunqerkolben entspannen 12 Plungerkolben entspannen 13 Schraube 14 Nutenstein 15 Kolbenplatte 16 Kolbenplatte 17 Stirnseite 18 Stirnseite 19 Spannstelle 20 Werkstück 21 Hydraulikanschluss 22 Kolben 23 Keilstück 24 Tellerfeder 25 Hydraulikanschluss 26 Hydraulikanschluss 27 Führungsfläche 28 Führungsfläche 29 30 To relax the piston 22 is first depressurized and brought by its disc springs 24 back to the starting position. Thus, the contact pressure for the slide in the recess 6 is canceled. Now, the pressure in the hydraulic connection 26 is released and at the same time hydraulic connection 21st acted upon, the plunger 11, 12 are actuated and the slide 2; 3 returned to its original position, the workpiece 20 is released for removal. <B> reference numerals </ b> 1 casing 2 pusher 3 pusher 4 recess 5 recess 6 recess 7 jaws 8th jaws 9 Tension plungers 10 Tension plungers 11 Plunqer flasks relax 12 Relax plungers 13 screw 14 sliding block 15 piston plate 16 piston plate 17 front 18 front 19 clamping point 20 workpiece 21 hydraulic connection 22 piston 23 wedge 24 Belleville spring 25 hydraulic connection 26 hydraulic connection 27 guide surface 28 guide surface 29 30

Claims (4)

  1. Clamping element for clamping workpieces (20) that are already held in their positioned location and for which a supporting uptake is required at certain places, with a housing (1) and with clamping jaws (7, 8) that can be moved up and fixed onto the workpiece, and are set on two parallel slides (2; 3) that are slidingly guided in guideways, characterised in that
    a) The guideways are sunk-in in openings (4; 5) of the housing (1),
    b) the input force for moving the slides is effected through plunger pistons (9; 10) that act on the front sides (17; 18) of the slides and thereby form a short lever arm between input force and output force,
    c) The plunger pistons (9; 10) are located in the piston plates (15; 16) of the housing (1) and are pressurised from the same hydraulic connection,
    d) a piston (22) that acts at right angles to the plane of the slides is introduced in the housing (1) underneath the slides (2; 3),
    e) the slides (2; 3) are each provided with a recess (6) extending in a wedge-shaped manner,
    f) the piston (22) is provided at its head with a wedge (23) that is guided slidingly in the recess (6) of the slides,
    g) in the clamped state, the slides (2; 3) can be fixed with their clamping jaws (7; 8) in contact with the workpiece, in that pressure is admitted to the piston (22) that is pulled downward into the housing (1), and thereby pulls the wedge (23) at its head into the recesses (6), forces apart the slides (2; 3) and presses them into the guide surfaces (27; 28) of the openings (4; 5).
  2. Clamping element according to claim 1, characterised in that the slides (2; 3) are equipped with replaceable, attachable clamping jaws (7; 8).
  3. Clamping element according to claim 1 or 2, characterised in that the wedge (23) is designed such that the slides (2; 3) are fixed in a self-locking manner when clamped.
  4. Clamping element according to one of claims 1 to 3, characterised in that the slides (2; 3) with their clamping jaws (7; 8) with a force uniformly acting on them are moveable onto the workpiece and cause a force that is uniform on both sides to act on the workpiece, the force fixing the workpiece in its position in an unchanged manner.
EP02102029.2A 2001-08-01 2002-07-11 Clamping element with hydraulically operated sliders Expired - Lifetime EP1281479B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10137686 2001-08-01
DE10137686A DE10137686A1 (en) 2001-08-01 2001-08-01 clamping element

Publications (3)

Publication Number Publication Date
EP1281479A2 EP1281479A2 (en) 2003-02-05
EP1281479A3 EP1281479A3 (en) 2009-03-18
EP1281479B1 true EP1281479B1 (en) 2016-09-07

Family

ID=7693991

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02102029.2A Expired - Lifetime EP1281479B1 (en) 2001-08-01 2002-07-11 Clamping element with hydraulically operated sliders

Country Status (3)

Country Link
US (1) US6832755B2 (en)
EP (1) EP1281479B1 (en)
DE (1) DE10137686A1 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10137686A1 (en) * 2001-08-01 2003-02-13 Rudolf Kohlert clamping element
CN102848265A (en) * 2012-10-09 2013-01-02 江苏润孚机械轧辊制造有限公司 Milling machine universal stand
CN102975054A (en) * 2013-01-04 2013-03-20 江苏天宏自动化科技有限公司 Pot type locating and pressing mechanism
CN107471231B (en) * 2017-08-02 2024-02-13 宁夏巨能机器人股份有限公司 Robot paw device for clamping special-shaped workpiece
DE202020000509U1 (en) 2020-02-07 2020-03-12 Christof Steubing Clamping, gripping, positioning and holding device
US11759914B2 (en) 2020-08-06 2023-09-19 Mate Precision Technologies Inc. Vise assembly
WO2022032148A1 (en) 2020-08-06 2022-02-10 Mate Precision Technologies Inc. Tooling base assembly
CN114714390A (en) * 2022-04-27 2022-07-08 斯派科智能科技(东莞)有限公司 Pneumatic clamping jaw

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1736363A (en) * 1927-11-05 1929-11-19 Tabor Mfg Co Molding-machine clamp
US1812959A (en) * 1928-07-23 1931-07-07 Whitehead & Kales Co Apparatus for making wheel spiders
US2679177A (en) * 1953-05-13 1954-05-25 Gepfert Franklin Gahl Precision vise of the double-acting type
US4257513A (en) * 1979-04-26 1981-03-24 Siarto Machine And Tool Co., Inc. Machine tool
US4865375A (en) * 1988-05-31 1989-09-12 Amp Incorporated Gripper head
JPH0624574Y2 (en) * 1988-11-09 1994-06-29 日本精工株式会社 Linear guide device with clamp device
DE19650431B4 (en) * 1996-12-05 2004-04-08 Schunk Gmbh & Co. Kg Fabrik Für Spann- Und Greifwerkzeuge gripping device
DE19902596A1 (en) * 1999-01-23 2000-08-24 Kirsching Franz Clamp for moving machine parts has a hollow pressure zone within the trolley to force a pressure transfer disk against the guide rail and hold the trolley in place without play
IT1314646B1 (en) * 2000-02-11 2002-12-31 Gimatic Spa GUIDE SYSTEM OF THE CLAMPS IN PLIERS OPERATED BY A FLUID.
DE20100104U1 (en) * 2001-01-04 2001-04-05 Graf, Stephan, Dipl.-Ing. (FH), 79106 Freiburg Parallel gripper with decoupled gripper jaws
DE10137686A1 (en) * 2001-08-01 2003-02-13 Rudolf Kohlert clamping element

Also Published As

Publication number Publication date
EP1281479A3 (en) 2009-03-18
DE10137686A1 (en) 2003-02-13
US6832755B2 (en) 2004-12-21
EP1281479A2 (en) 2003-02-05
US20030025260A1 (en) 2003-02-06

Similar Documents

Publication Publication Date Title
EP0936366B1 (en) Breaking device for a linear guide
CH654779A5 (en) PNEUMATICALLY DRIVEN TENSIONER.
EP0388721B1 (en) Press with tool frame insertable into the press
DE9218907U1 (en) Mold clamping jaws for clamping workpieces
EP1824641B1 (en) Clamping element for workpieces, especially vise
EP1281479B1 (en) Clamping element with hydraulically operated sliders
DE2718776A1 (en) TWO-STAGE PRESSURE AMPLIFIER
DE3436075C1 (en) Device for the releasable connection of gripper rail parts of the gripper rails in a transfer press
EP3569354B1 (en) Device for fixing workpieces and processing unit
DE102011115326B4 (en) Positioning device for a pressing device and pressing device
DE1459339A1 (en) Toggle press
DE3221834C2 (en) Rail clamp
DD244710B1 (en) GRIPPING RAIL CHANGE AND POSITIONING DEVICE FOR THE AUTOMATIC TOOL CHANGE IN PRESSES, ESPECIALLY TRANSFER PRESSES
DE29918229U1 (en) Sample holder for clamping workpieces
DE2210795C3 (en) Hydraulic vertical press
EP2783795B1 (en) Clamping jaw
DE19858837B4 (en) Press for hydroforming
DE102010038812B4 (en) Press for producing laminated components of greater length
DE10135281A1 (en) Clamping element for flexible clamping of workpieces
DE3020545A1 (en) DEVICE FOR INSERTING HOLES IN A COMPONENT
DE3009770A1 (en) Pressure plate for wooden workpieces - has rows of small pressure chambers to spread load and reduce leakage
EP0612386B1 (en) Stop slide valve
DE3039906C2 (en) Pneumatically driven clamping device, in particular machine vice
DE866461C (en) Toggle press
EP1243353A2 (en) Clamping device for tools opened by opening forces

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR

AX Request for extension of the european patent

Extension state: AL LT LV MK RO SI

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: LUDWIG EHRHARDT GMBH

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR

AX Request for extension of the european patent

Extension state: AL LT LV MK RO SI

17P Request for examination filed

Effective date: 20090918

AKX Designation fees paid

Designated state(s): AT CH DE FR GB LI

17Q First examination report despatched

Effective date: 20091221

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

RIC1 Information provided on ipc code assigned before grant

Ipc: B25B 5/06 20060101ALI20160113BHEP

Ipc: B25B 1/18 20060101AFI20160113BHEP

INTG Intention to grant announced

Effective date: 20160127

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT CH DE FR GB LI

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 50216176

Country of ref document: DE

REG Reference to a national code

Ref country code: AT

Ref legal event code: REF

Ref document number: 826412

Country of ref document: AT

Kind code of ref document: T

Effective date: 20161015

REG Reference to a national code

Ref country code: CH

Ref legal event code: NV

Representative=s name: ROSENICH PAUL; KUENSCH JOACHIM PATENTBUERO PAU, LI

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 50216176

Country of ref document: DE

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 16

26N No opposition filed

Effective date: 20170608

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 17

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 20190725

Year of fee payment: 18

REG Reference to a national code

Ref country code: CH

Ref legal event code: PCAR

Free format text: NEW ADDRESS: ROTENBODENSTRASSE 12, 9497 TRIESENBERG (LI)

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20200731

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20200731

REG Reference to a national code

Ref country code: DE

Ref legal event code: R082

Ref document number: 50216176

Country of ref document: DE

Representative=s name: TAPPE, UDO, DIPL.-PHYS. DR.RER.NAT., DE

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 20210720

Year of fee payment: 20

Ref country code: FR

Payment date: 20210722

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20210731

Year of fee payment: 20

Ref country code: GB

Payment date: 20210722

Year of fee payment: 20

REG Reference to a national code

Ref country code: DE

Ref legal event code: R071

Ref document number: 50216176

Country of ref document: DE

REG Reference to a national code

Ref country code: GB

Ref legal event code: PE20

Expiry date: 20220710

REG Reference to a national code

Ref country code: AT

Ref legal event code: MK07

Ref document number: 826412

Country of ref document: AT

Kind code of ref document: T

Effective date: 20220711

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20220710