EP1321234B1 - Centering clamping element - Google Patents

Centering clamping element Download PDF

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Publication number
EP1321234B1
EP1321234B1 EP02102519A EP02102519A EP1321234B1 EP 1321234 B1 EP1321234 B1 EP 1321234B1 EP 02102519 A EP02102519 A EP 02102519A EP 02102519 A EP02102519 A EP 02102519A EP 1321234 B1 EP1321234 B1 EP 1321234B1
Authority
EP
European Patent Office
Prior art keywords
self
deflecting
deflecting pins
centring
pins
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
EP02102519A
Other languages
German (de)
French (fr)
Other versions
EP1321234A3 (en
EP1321234A2 (en
Inventor
Rudolf Kohlert
David Fischer
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
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Publication of EP1321234A2 publication Critical patent/EP1321234A2/en
Publication of EP1321234A3 publication Critical patent/EP1321234A3/en
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Publication of EP1321234B1 publication Critical patent/EP1321234B1/en
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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
    • B25B1/08—Arrangements for positively actuating jaws using cams
    • 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
    • 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S409/00—Gear cutting, milling, or planing
    • Y10S409/903—Work holder
    • 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
    • Y10T279/00—Chucks or sockets
    • Y10T279/12—Chucks or sockets with fluid-pressure actuator
    • Y10T279/1274—Radially reciprocating jaws
    • 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
    • Y10T279/00—Chucks or sockets
    • Y10T279/12—Chucks or sockets with fluid-pressure actuator
    • Y10T279/1274—Radially reciprocating jaws
    • Y10T279/1291—Fluid pressure moves jaws via mechanical connection
    • 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
    • Y10T279/00—Chucks or sockets
    • Y10T279/19—Radially reciprocating jaws
    • Y10T279/1973—Wedge actuated
    • 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
    • Y10T409/00—Gear cutting, milling, or planing
    • Y10T409/30—Milling
    • Y10T409/30868—Work support
    • Y10T409/309016—Work support with work holder or guide

Definitions

  • the invention relates to a Zentrierspannelement for clamping workpieces between clamping jaws, which are associated with centering slides and which are moved over paired deflecting bolts.
  • Centering clamping elements have the task of clamping workpieces centered. It is important that the jaws that receive and hold the workpiece are exactly guided and run without play on each other. It is known to move the jaws by means of a rack and a pinion, with the result that the restraining force is always only as large as the clamping force itself. Thus, all forces acting on the workpiece during machining forces have a negative effect on the holding effect , The known spindle drives with right-left thread have the disadvantage that they are not backlash. It is important that the workpiece is held securely and is not affected by any processing force in its position.
  • An arrangement for a clamping unit is known ( EP 0 386 295 B1 ) are used in pairs for transferring the drive forces in the deflection pin, which transmit the force in opposite directions via wedge surfaces and wedge slopes.
  • Such Zentrierspannelement is provided with a drive slide, which is longitudinally guided in the housing and is provided with wedge slopes, which are each associated with a pair of opposite deflection pins.
  • the deflection bolts act again on wedge slopes on Zentrierspannspannschieber. This has the advantage that the frictional forces are very large and due to the double motion deflection by means of the wedge slopes restraint forces are generated which amount to a multiple of the clamping force.
  • the deflection bolts are perpendicular to the footprint of the element and thus determine the height, which in turn determines how far the tensioned workpiece is removed from the machine table removed. This adds to the longitudinal and lateral forces the leverage of the jaws on the machine table, which can lead to tension.
  • centering clamping element according to the invention is characterized by the features of claim 1.
  • the centering clamping element consists of a housing 1, in which the entire mechanism is integrated.
  • housing 1 horizontal recesses 2a, b and 3a, b are embedded.
  • deflecting pins 4a, b and 5a, b are slidably guided.
  • Each deflecting pin 4; 5 is provided at the head end with a continuous wedge slope 6 over the cross section.
  • a recess 7 is embedded in the deflection pin, which has a straight boundary surface 9 towards the lower end and which is delimited by an inclined surface 8 on the other side.
  • the deflecting pin is provided on the underside with a flattening 10 and on the opposite side in the head region with a flat 11.
  • the deflecting pins are assigned in pairs to the recesses and accordingly their wedge slopes 6 and their inclined surfaces 8 are matched to each other.
  • a cylinder bore 12 is introduced, in which the recesses 2; 3 ends, so that a connection between the recesses and the cylinder bore exists.
  • two pistons 13; 14 taken in. These pistons are over a partial area towards the center of the cylinder bore with wedge surfaces 15; 17 provided.
  • the wedge surfaces 15 extend to the recesses 2a, b, so that they are directed at an angle to the recesses.
  • the wedge surfaces 17 are inserted so that they are directed at an angle away from the recesses 3a, b, where they end in a recess 16.
  • the deflecting pins 4; 5 are in pairs in the recesses 3; 4 used that their recesses 7 are directed to the clamping side of the element.
  • the housing 1 is provided over the recesses 7 of each pair of deflecting pins with a recess 23 so that an opening is formed upwards.
  • each Umlenkbolzencrues In the Recesses 7 of each Umlenkbolzencrues is a driving prism 18; 19 inserted.
  • Each driving prism 18; 19 is with inclined surfaces 26; 27 provided, which are tuned to the inclined surfaces 8 of the deflecting pins, so that they are guided slidingly on each other.
  • the recess 7 in the Umlenkbolzen is chosen so large that a space 20 between Mit Spotifyprisma 18; 19 and the boundary surface 9 remains.
  • Each pick-up prism 18; 19 is assigned a Zentrierspannschieber 21, so that driving prism and Zentrierspannschieber form a unit.
  • the Zentrierspannschieber 21 are slidably guided on the housing 1 and laterally bounded by guide rails 22.
  • the takeaway prisms 18; 19 perform a lateral movement, accordingly, the recesses 23 in the housing 1 are designed so that a sufficiently large space is available. This clearance corresponds in a ratio to the stroke of the piston 13; 14 and the dependent movements of the other parts.
  • the pistons 13; 14 are hydraulically via the hydraulic connections 24; 25 operated.
  • jaws 28; 29 attached, in releasable connection, so that the clamping jaws are adaptable to every application.
  • the housing 1 are assigned at the bottom directional grooves, by means of which it can be accommodated positioned on machine tables.
  • sensors can be introduced, by means of which the position of the piston and or the position of the deflecting pin and thus also the position of the Zentrierspannschieber can be monitored and displayed.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jigs For Machine Tools (AREA)
  • Aerials With Secondary Devices (AREA)
  • Road Signs Or Road Markings (AREA)

Abstract

The centering clamping element clamps workpieces by means of diverting bolts between a drive element and centering clamping slides (21). There are four recesses in the casing (1) in a plane parallel to the resting plane of the unit, in which the pairs of diverting bolts can slide. The bolts are wedge-shaped at the top end.

Description

Die Erfindung bezieht sich auf ein Zentrierspannelement zum Spannen von Werkstücken zwischen Spannbacken, die Zentrierspannschiebern zugeordnet sind und die über paarweise angeordnete Umlenkbolzen bewegt werden.The invention relates to a Zentrierspannelement for clamping workpieces between clamping jaws, which are associated with centering slides and which are moved over paired deflecting bolts.

Zentrierspannelemente haben die Aufgabe Werkstücke zentriert zu spannen. Hierbei kommt es darauf an, daß die Spannbacken, die das Werkstück aufnehmen und halten exakt geführt sind und ohne Spiel auf einander zufahren. Es ist bekannt die Spannbacken mittels einer Zahnstange und eines Ritzels zu bewegen, was zur Folge hat, daß die Rückhaltekraft immer nur so groß ist, wie die Spannkraft selbst. Damit wirken sich alle auf das Werkstück während der Bearbeitung einwirkenden Kräfte negativ auf die Haltewirkung aus. Die bekannten Spindelantriebe mit Rechts-Linksgewinde haben den Nachteil, daß sie nicht spielfrei sind. Es kommt darauf an, daß das Werkstück sicher gehalten wird und durch keine Bearbeitungskraft in seiner Position beeinträchtigt wird.Centering clamping elements have the task of clamping workpieces centered. It is important that the jaws that receive and hold the workpiece are exactly guided and run without play on each other. It is known to move the jaws by means of a rack and a pinion, with the result that the restraining force is always only as large as the clamping force itself. Thus, all forces acting on the workpiece during machining forces have a negative effect on the holding effect , The known spindle drives with right-left thread have the disadvantage that they are not backlash. It is important that the workpiece is held securely and is not affected by any processing force in its position.

Es ist eine Anordnung für eine Spanneinheit bekannt ( EP 0 386 295 B1 ) bei der Umlenkbolzen paarweise zur Übertragung der Antriebskräfte eingesetzt werden, die gegenläufig über Keilflächen und Keilschrägen die Kraft übertragen. Ein solches Zentrierspannelement ist mit einem Antriebsschieber versehen, der im Gehäuse längsgeführt ist und mit Keilschrägen versehen ist, die je einem Paar gegenläufiger Umlenkbolzen zugeordnet sind. Die Umlenkbolzen wirken wieder über Keilschrägen auf Zentrierspannspannschieber. Dieses hat den Vorteil, daß die Reibungskräfte sehr groß sind und infolge der doppelten Bewegungsumlenkung mittels der Keilschrägen Rückhaltekräfte erzeugt werden, die ein vielfaches der Spannkraft betragen. Die Umlenkbolzen stehen jedoch senkrecht über der Aufstellfläche des Elementes und bestimmen damit die Bauhöhe, die wiederum bestimmt wie weit das gespannte Werkstück vom Maschinentisch entfernt aufgenommen wird. Damit addiert sich zu den Längs- und Querkräften die Hebelwirkung der Spannbacken über dem Maschinentisch, was zu Verspannungen führen kann.An arrangement for a clamping unit is known ( EP 0 386 295 B1 ) are used in pairs for transferring the drive forces in the deflection pin, which transmit the force in opposite directions via wedge surfaces and wedge slopes. Such Zentrierspannelement is provided with a drive slide, which is longitudinally guided in the housing and is provided with wedge slopes, which are each associated with a pair of opposite deflection pins. The deflection bolts act again on wedge slopes on Zentrierspannspannschieber. This has the advantage that the frictional forces are very large and due to the double motion deflection by means of the wedge slopes restraint forces are generated which amount to a multiple of the clamping force. However, the deflection bolts are perpendicular to the footprint of the element and thus determine the height, which in turn determines how far the tensioned workpiece is removed from the machine table removed. This adds to the longitudinal and lateral forces the leverage of the jaws on the machine table, which can lead to tension.

Es ist somit Aufgabe der Erfindung ein Spannelement so zu gestalten, daß es mit einer geringen Bauhöhe auskommt, indem die Krafteinleitung in die Umlenkbolzen waagerecht in einer Ebene unmittelbar unter der Ebene der Zentrierspannschieber erfolgt und die Keilmechanik liegend, d.h. parallel zur Aufstellfläche angeordnet ist.It is therefore an object of the invention to design a clamping element so that it manages with a low overall height by the introduction of force into the deflection pin horizontally in a plane immediately below the plane of the Zentrierspannschieber and the wedge mechanism lying, i. is arranged parallel to the footprint.

Zur Lösung dieser Aufgabe ist das erfindungsgemäße Zentrierspannelement durch die Merkmale des Anspruchs 1 gekennzeichnet.To solve this problem, the centering clamping element according to the invention is characterized by the features of claim 1.

Der Vorteil einer solchen Anordnung liegt darin, daß die Werkstücke möglichst nahe an die Aufstellfläche des Spannelementes auf dem Maschinentisch herangeführt sind und damit die sonst bei der Bearbeitung der Werkstücke entstehenden Schwingungen weitestgehend eliminiert sind. Darüber hinaus bedingt diese Anordnung in einer Ebene durch die Lage der Umlenkbolzen und des damit verbundenen Bewegungsablaufes aller daran beteiligten Teile, daß sich eine sehr große Rückhaltekraft aufbaut, so daß einmal gespannte Werkstücke durch die Bearbeitungskräfte nicht mehr in ihrer Lage und Halterung beeinflußt werden können.The advantage of such an arrangement is that the workpieces are brought as close as possible to the footprint of the clamping element on the machine table and thus the otherwise resulting in the processing of workpieces vibrations are largely eliminated. In addition, this arrangement in a plane due to the position of the deflecting pin and the associated movement of all parts involved that a very large retention force builds up so that once stretched workpieces can not be influenced by the processing forces in their position and support.

Weitere Merkmale der Erfindung beziehen sich auf konstruktive Ausgestaltungen des Zentrierspannelementes.Further features of the invention relate to constructive embodiments of the Zentrierspannelementes.

Die Erfindung wird nachfolgend anhand eines in der Zeichnung dargestellten Ausführungsbeispiels näher erläutert. Es zeigen:

  • Fig. 1 ein Zentrierspannelement mit den Erfindungsmerkmalen in Vorderansicht,
  • Fig. 2 das Zentrierspannelement gemäß Fig. 1 im Horizontalschnitt in der Ebene A-A,
  • Fig. 3 das Zentrierspannelement gemäß Fig. 1 im Schnitt in der Ebene B-B,
  • Fig. 4 einen Umlenkbolzen für das Zentrierspannelement gemäß Fig. 1 in perspektivischer Darstellung, und
  • Fig. 5 das Zentrierspannelement gemäß Fig. 1 im Längsschnitt in der Ebene C-C.
The invention will be explained in more detail with reference to an embodiment shown in the drawing. Show it:
  • Fig. 1 a Zentrierspannelement with the features of the invention in front view,
  • Fig. 2 the centering clamping element according to Fig. 1 in horizontal section in the plane AA,
  • Fig. 3 the centering clamping element according to Fig. 1 in section in the plane BB,
  • Fig. 4 a deflecting pin for the centering according to Fig. 1 in perspective, and
  • Fig. 5 the centering clamping element according to Fig. 1 in longitudinal section in the plane CC.

Das Zentrierspannelement besteht aus einem Gehäuse 1, in das die gesamte Mechanik integriert ist. In dem Gehäuse 1 sind waagerecht liegende Ausnehmungen 2a, b und 3a, b eingelassen. In diesen Ausnehmungen sind Umlenkbolzen 4a, b und 5a, b gleitend geführt. Jeder Umlenkbolzen 4; 5 ist am Kopfende mit einer über den Querschnitt durchgehenden Keilschräge 6 versehen. Am anderen Ende ist in den Umlenkbolzen eine Aussparung 7 eingelassen, die zum unteren Ende hin eine gerade Begrenzungsfläche 9 aufweist und die mit einer Schrägfläche 8 auf der anderen Seite begrenzt ist. Der Umlenkbolzen ist an der Unterseite mit einer Abflachung 10 und an der gegenüberliegenden Seite im Kopfbereich mit einer Abflachung 11 versehen. Die Umlenkbolzen sind paarweise den Ausnehmungen zugeordnet und dementsprechend sind ihre Keilschrägen 6 und ihre Schrägflächen 8 auf einander abgestimmt.The centering clamping element consists of a housing 1, in which the entire mechanism is integrated. In the housing 1 horizontal recesses 2a, b and 3a, b are embedded. In these recesses deflecting pins 4a, b and 5a, b are slidably guided. Each deflecting pin 4; 5 is provided at the head end with a continuous wedge slope 6 over the cross section. At the other end, a recess 7 is embedded in the deflection pin, which has a straight boundary surface 9 towards the lower end and which is delimited by an inclined surface 8 on the other side. The deflecting pin is provided on the underside with a flattening 10 and on the opposite side in the head region with a flat 11. The deflecting pins are assigned in pairs to the recesses and accordingly their wedge slopes 6 and their inclined surfaces 8 are matched to each other.

Im Gehäuse 1 ist quer zu den Ausnehmungen 2; 3 eine Zylinderbohrung 12 eingebracht, in der die Ausnehmungen 2; 3 enden, so daß eine Verbindung zwischen den Ausnehmungen und der Zylinderbohrung besteht. In der Zylinderbohrung 12 sind zwei Kolben 13; 14 eingelassen. Diese Kolben sind über einen Teilbereich zur Mitte der Zylinderbohrung hin mit Keilflächen 15; 17 versehen. In dem Kolben 13 verlaufen die Keilflächen 15 auf die Ausnehmungen 2a, b zu, so daß sie in einem Winkel auf die Ausnehmungen gerichtet sind. In dem Kolben 14 sind die Keilflächen 17 so eingelassen, daß sie in einem Winkel von den Ausnehmungen 3a, b weg gerichtet sind, wo sie in einer Aussparung 16 enden.In the housing 1 is transverse to the recesses 2; 3 a cylinder bore 12 is introduced, in which the recesses 2; 3 ends, so that a connection between the recesses and the cylinder bore exists. In the cylinder bore 12, two pistons 13; 14 taken in. These pistons are over a partial area towards the center of the cylinder bore with wedge surfaces 15; 17 provided. In the piston 13, the wedge surfaces 15 extend to the recesses 2a, b, so that they are directed at an angle to the recesses. In the piston 14, the wedge surfaces 17 are inserted so that they are directed at an angle away from the recesses 3a, b, where they end in a recess 16.

Zwischen den Keilflächen 15; 17 der Kolben 13; 14 und den Umlenkbolzen 4a, b und 5a, b wird eine eng anliegende Verbindung hergestellt, in dem die Umlenkbolzen so in die Ausnehmungen 2a, b und 3a, b eingeführt werden, daß die Keilschrägen 6 der Umlenkbolzen gleitend an den Keilflächen 15; 17 der Kolben anliegen. Die Umlenkbolzen 4; 5 sind paarweise so in die Ausnehmungen 3; 4 eingesetzt, daß ihre Aussparungen 7 zur Spannseite des Elementes gerichtet sind. Das Gehäuse 1 ist über den Aussparungen 7 eines jeden Paares von Umlenkbolzen mit einer Ausnehmung 23 versehen, so daß nach oben eine Öffnung entsteht. In die Aussparungen 7 eines jeden Umlenkbolzenpaares ist ein Mitnahmeprisma 18; 19 eingefügt. Jedes Mitnahmeprisma 18; 19 ist mit Schrägflächen 26; 27 versehen, die auf die Schrägflächen 8 der Umlenkbolzen abgestimmt sind, so daß sie auf einander gleitend geführt sind. Die Aussparung 7 in den Umlenkbolzen ist so groß gewählt, daß ein Freiraum 20 zwischen Mitnahmeprisma 18; 19 und der Begrenzungsfläche 9 verbleibt.Between the wedge surfaces 15; 17, the piston 13; 14 and the deflecting pins 4a, b and 5a, b, a tight-fitting connection is made, in which the deflecting pins are inserted into the recesses 2a, b and 3a, b, that the wedge slopes 6 of the deflecting pin slidably on the wedge surfaces 15; 17 abut the piston. The deflecting pins 4; 5 are in pairs in the recesses 3; 4 used that their recesses 7 are directed to the clamping side of the element. The housing 1 is provided over the recesses 7 of each pair of deflecting pins with a recess 23 so that an opening is formed upwards. In the Recesses 7 of each Umlenkbolzenpaares is a driving prism 18; 19 inserted. Each driving prism 18; 19 is with inclined surfaces 26; 27 provided, which are tuned to the inclined surfaces 8 of the deflecting pins, so that they are guided slidingly on each other. The recess 7 in the Umlenkbolzen is chosen so large that a space 20 between Mitnahmeprisma 18; 19 and the boundary surface 9 remains.

Jedem Mitnahmeprisma 18; 19 ist ein Zentrierspannschieber 21 zugeordnet, so daß Mitnahmeprisma und Zentrierspannschieber eine Einheit bilden. Die Zentrierspannschieber 21 sind gleitend auf dem Gehäuse 1 geführt und seitlich von Führungsleisten 22 begrenzt. Die Mitnahmeprismen 18; 19 vollziehen eine seitliche Bewegung, dementsprechend sind die Aussparungen 23 im Gehäuse 1 so ausgelegt, daß ein genügend großer Freiraum vorhanden ist. Dieser Freiraum entspricht in einem Verhältnis dem Hub der Kolben 13; 14 und den davon abhängigen Bewegungen der anderen Teile. Die Kolben 13; 14 werden hydraulisch über die Hydraulikanschlüsse 24; 25 betrieben. Auf die Zentrierspannschieber 21 sind Spannbacken 28; 29 aufgesetzt, und zwar in lösbarer Verbindung, so daß die Spannbacken jedem Anwendungsfall anpaßbar sind.Each pick-up prism 18; 19 is assigned a Zentrierspannschieber 21, so that driving prism and Zentrierspannschieber form a unit. The Zentrierspannschieber 21 are slidably guided on the housing 1 and laterally bounded by guide rails 22. The takeaway prisms 18; 19 perform a lateral movement, accordingly, the recesses 23 in the housing 1 are designed so that a sufficiently large space is available. This clearance corresponds in a ratio to the stroke of the piston 13; 14 and the dependent movements of the other parts. The pistons 13; 14 are hydraulically via the hydraulic connections 24; 25 operated. On the Zentrierspannschieber 21 jaws 28; 29 attached, in releasable connection, so that the clamping jaws are adaptable to every application.

Wird der Hydraulikanschluß 25 beaufschlagt, so werden die Kolben 13; 14 nach rechts bewegt. Die Keilflächen 15; 17 gleiten über die Keilschrägen 6 der Umlenkbolzen 4; 5 und üben damit einen Druck auf jedes Umlenkbolzenpaar aus. Damit erfolgt eine gegenläufige Verschiebung der Umlenkbolzen. Die Umlenkbolzen 4b und 5a wandern in Richtung von den Kolben weg und die Umlenkbolzen 4a und 5b vollführen die gleiche Bewegung entgegengesetzt. Diese Parallelverschiebung für die Umlenkbolzen 4; 5 wird hervorgerufen durch das jedem Umlenkbolzenpaar zugeordnete Mitnahmeprisma 18; 19. Der auf die Umlenkbolzen 4b einwirkende Druck setzt sich über die Schrägfläche 8 der Aussparung 7 fort auf die Schrägfläche 27 des Mitnahmeprismas 18. Die Flächen gleiten aufeinander und das Mitnahmeprisma 18 wird nach links bewegt. Das gleiche spielt sich am Umlenkbolzen 5a ab, so daß das Mitnahmeprisma 19 nach rechts verschoben wird. Die mit den Mitnahmeprismen verbundenen Zentrierspannschieber folgen dieser Bewegung, das Spannelement öffnet sich und ein Werkstück 30 kann eingelegt werden. Wird dann der Hydraulikanschluß 24 beaufschlagt, verschieben sich die Kolben nach links, die Umlenkbolzen werden in der anderen Richtung bewegt, womit die Mitnahmeprismen aufeinander zu fahren und das Werkstück gespannt wird.If the hydraulic connection 25 is acted upon, the pistons 13; 14 moved to the right. The wedge surfaces 15; 17 slide over the wedge slopes 6 of the deflection pin 4; 5 and thus exert a pressure on each Umlenkbolzenpaar. This results in an opposite displacement of the deflection pin. The deflecting pins 4b and 5a move away from the pistons and the deflecting pins 4a and 5b carry out the same movement in the opposite direction. This parallel displacement for the deflection pin 4; 5 is caused by the Mitnahmeprisma associated with each Umlenkbolzenpaar 18; 19. The pressure acting on the deflection pins 4b pressure continues over the inclined surface 8 of the recess 7 on the inclined surface 27 of the driving prism 18. The surfaces slide on each other and the driving prism 18 is moved to the left. The same takes place at the deflection pin 5a, so that the driving prism 19 is moved to the right. The associated with the driving prisms Zentrierspannschieber follow this movement, the clamping element opens and a workpiece 30 can be inserted. If the hydraulic connection 24 is then acted upon, the pistons move to the left, the deflection bolts are moved in the other direction, with which the driving prisms are moved towards one another and the workpiece is tensioned.

Dem Gehäuse 1 sind an der Unterseite Richtnuten zugeordnet, mittels derer es auf Maschinentischen positioniert aufgenommen werden kann. Zur Befestigung des Zentrierspannelementes auf den Maschinentisch dienen die Befestigungsschrauben 31.The housing 1 are assigned at the bottom directional grooves, by means of which it can be accommodated positioned on machine tables. For attachment of the Zentrierspannelementes on the machine table serve the mounting screws 31st

In dem Gehäuse können Sensoren eingebracht werden, mittels derer die Lage der Kolben und oder die Lage der Umlenkbolzen und somit auch die Stellung der Zentrierspannschieber überwachbar und anzeigbar ist.In the housing sensors can be introduced, by means of which the position of the piston and or the position of the deflecting pin and thus also the position of the Zentrierspannschieber can be monitored and displayed.

Bezugszeichenliste:LIST OF REFERENCE NUMBERS

11
Gehäusecasing
22
Ausnehmung a, bRecess a, b
33
Ausnehmung a, bRecess a, b
44
Umlenkbolzen a, bTurning pin a, b
55
Umlenkbolzen a, bTurning pin a, b
66
Keilschrägesloping face
77
Aussparungrecess
88th
Schrägflächesloping surface
99
Begrenzungsflächeboundary surface
1010
Abflachungflattening
1111
Führungsflächeguide surface
1212
Zylinderbohrungbore
1313
Kolbenpiston
1414
Kolbenpiston
1515
Keilflächewedge surface
1616
Aussparungrecess
1717
Keilflächewedge surface
1818
Mitnahmeprismacarrier prism
1919
Mitnahmeprismacarrier prism
2020
Freiraumfree space
2121
Schieberpusher
2222
Führungsleisteguide rail
2323
Aussparungrecess
2424
Hydraulikanschlußhydraulic connection
2525
Hydraulikanschlußhydraulic connection
2626
SchrägeflächeSchrägefläche
2727
SchrägeflächeSchrägefläche
2828
Spannbackenjaws
2929
Spannbackenjaws
3030
Werkstückworkpiece
3131
Befestigungsstifte-SchraubenFixing pins screws

Claims (6)

  1. Self-centring clamping unit for clamping work pieces between clamping jaws that are attached to self-centring clamping slides, with deflecting pins that are arranged in pairs in a housing between a linkage and the self-centring clamping slides and which bring about the transmission of forces from the linkage to the self-centring clamping slides via wedge surfaces, characterised in that four recesses (2; 3) are set in the housing (1) in a plane located in parallel to the mounting surface of the unit, into which recesses are slidingly guided two deflecting pins (4; 5), each cooperating in pairs, that the deflecting pins are provided with wedge bevels (6) at the head end and slide on the wedge surfaces (15; 17), which are associated with two pistons (13; 14) that are guided in the same plane in a cylinder bore (12) provided at right angles to the recesses (2; 3), such that the movement of the pistons causes the pairs of deflecting pins to move in opposite directions and that self-centring clamping slides (21) are slidingly guided via carrier prisms (18; 19) in the deflecting pins and can be displaced at right angles to the direction of movement of the deflecting pins and are guided in a second plane located in parallel directly above the deflecting pins.
  2. Self-centring clamping unit according to Claim 1, characterised in that the deflecting pins (4; 5) are provided in a partial area with a recess (7) and that the recess (7) has a straight limiting surface (9) towards the end of the deflecting pin, and the recess is limited by an oblique surface (8) opposite this limiting surface.
  3. Self-centring clamping unit according to Claim 1 to 2, characterised in that a carrier prism (18; 19) provided with two bevels (26; 27) can be inserted into the recess (7) of each pair of deflecting pins such that the bevels (26; 27) fit closely on the oblique surfaces (8) of the deflecting pins (4; 5) and are slidingly guided.
  4. Self-centring clamping unit according to Claim 1 to 3, characterised in that the carrier prism (18; 19) is connected with the self-centring clamping slide (21).
  5. Self-centring clamping unit according to claims 1 to 4, characterised in that the pistons (13; 14) are operated hydraulically over the hydraulic connections (24; 25) and that the piston movement over the wedge surfaces (15; 17) and wedge bevel (6) displaces the deflecting pins (4; 5) pair wise in opposite directions and that as a result of the contrary movement of the deflecting pins, the carrier prisms (18; 19) lying in the recesses (7) are moved away from one another towards the exterior or towards one another inwards, such that the self-centring clamping slides (21) connected to the carrier prisms bring about the clamping process.
  6. Self-centring clamping unit according to claims 1 to 5, characterised in that the position of the self-centring clamping slides and consequently the state of the deflecting pins and pistons can be monitored and scanned by sensors.
EP02102519A 2001-12-20 2002-10-31 Centering clamping element Expired - Lifetime EP1321234B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10163104A DE10163104A1 (en) 2001-12-20 2001-12-20 Zentrierspannelement
DE10163104 2001-12-20

Publications (3)

Publication Number Publication Date
EP1321234A2 EP1321234A2 (en) 2003-06-25
EP1321234A3 EP1321234A3 (en) 2006-10-04
EP1321234B1 true EP1321234B1 (en) 2009-10-14

Family

ID=7710261

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02102519A Expired - Lifetime EP1321234B1 (en) 2001-12-20 2002-10-31 Centering clamping element

Country Status (4)

Country Link
US (1) US6783310B2 (en)
EP (1) EP1321234B1 (en)
AT (1) ATE445482T1 (en)
DE (2) DE10163104A1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE511016C2 (en) 1998-06-17 1999-07-19 Sca Hygiene Prod Ab Diaper with waste seal
GB201504860D0 (en) 2015-03-23 2015-05-06 Rolls Royce Controls & Data Services Ltd Electrical coupling unit
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
CN114309690B (en) * 2022-01-31 2023-03-14 浙江海德曼智能装备股份有限公司 Chuck

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3127527A1 (en) * 1981-07-11 1983-02-03 SMW Schneider & Weißhaupt GmbH, 7996 Meckenbeuren "POWER CHUCK FOR LATHE"
DE3619145C1 (en) * 1986-06-06 1987-07-02 Forkardt Paul Gmbh Chuck with two opposing jaws
DE3725714C1 (en) * 1987-08-04 1988-06-23 Guenter Horst 7927 Sontheim De Roehm
DE58905056D1 (en) * 1989-03-09 1993-09-02 David Fischer CENTERING CLAMPING ELEMENTS.
DE58906450D1 (en) * 1989-03-09 1994-01-27 David Fischer Power operated centering clamping unit.
DE3930690C1 (en) * 1989-09-14 1990-10-04 Paul Forkardt Gmbh & Co Kg, 4000 Duesseldorf, De
US5060958A (en) * 1990-04-09 1991-10-29 Roemheld Gmbh Power drive and transmission unit for self centering clamps and chucks
DE29811648U1 (en) * 1998-06-30 1998-09-17 Hico Himmel & Co KG, 78727 Oberndorf Device for centered clamping of workpieces or the like.
EP1101554B1 (en) * 1999-06-12 2001-07-25 FORKARDT Deutschland GmbH Power chuck for machine tools

Also Published As

Publication number Publication date
EP1321234A3 (en) 2006-10-04
EP1321234A2 (en) 2003-06-25
ATE445482T1 (en) 2009-10-15
US20030118417A1 (en) 2003-06-26
US6783310B2 (en) 2004-08-31
DE10163104A1 (en) 2003-07-03
DE50213916D1 (en) 2009-11-26

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