EP1697088B1 - Schnellklemmvorrichtung und steuerverfahren - Google Patents

Schnellklemmvorrichtung und steuerverfahren Download PDF

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Publication number
EP1697088B1
EP1697088B1 EP04805643A EP04805643A EP1697088B1 EP 1697088 B1 EP1697088 B1 EP 1697088B1 EP 04805643 A EP04805643 A EP 04805643A EP 04805643 A EP04805643 A EP 04805643A EP 1697088 B1 EP1697088 B1 EP 1697088B1
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EP
European Patent Office
Prior art keywords
arm
rod
ram
clamping
clamping device
Prior art date
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Application number
EP04805643A
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English (en)
French (fr)
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EP1697088A1 (de
Inventor
Christophe Boiteux
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    • 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
    • B25B5/08—Arrangements for positively actuating jaws using cams
    • B25B5/087—Arrangements for positively actuating jaws using cams actuated by a hydraulic or pneumatic piston
    • 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
    • B25B5/064—Arrangements for positively actuating jaws with fluid drive with clamping means pivoting around an axis perpendicular to the pressing direction

Definitions

  • the invention relates generally to techniques relating to mechanical machining.
  • the invention relates, according to a first aspect, to a device for clamping a workpiece on a tool, comprising a jack and a flange, the jack being selectively actuated by a pressurized fluid and comprising itself a body fixed in operation to the tool and a rod movable relative to the body, and the flange being hinged about a pivot axis on the rod and selectively driven by the rod, this flange struggling on a determined race between a position clamping and releasing position, and rotated on at least part of its stroke.
  • the flange is approximated to the workpiece to be clamped and applied to it by simple rotation of this flange about its pivot axis.
  • the rotation of the flange may have the effect of sliding the workpiece to be clamped or deformed.
  • the main purpose of the invention is to provide a compact, fast, retractable, powerful clamping device, and moreover free from the aforementioned defects.
  • the device of the invention is essentially characterized by it further comprises guiding members and bearing elements, in that the guiding members comprise a guiding member fixed relative to the body and a movable guiding member connected to the flange, these guiding members.
  • the support elements comprise a fixed support element relative to the body and a movable support element connected to the flange, these fixed and movable support elements cooperating selectively, at least on the end of the stroke of the flange to its clamping position, to afford each other, away from the guide members, a sliding contact parallel to the translational movement of the flange and allowing a bridging of the flange on the piece to ser rer.
  • the rod extends along a translation axis which passes between the guide members and the support elements, this arrangement allowing a balancing of the forces resistant to clamping and a very effective self-locking of the flange.
  • the movable guide member is for example constituted by a cam formed of two grooves hollowed symmetrically in the flange on either side of a median plane of the flange and the rod, transverse to the pivot axis.
  • Each groove advantageously has a path whose first and second ends are respectively relatively distant and relatively close to the pivot axis, this path approaching continuously the pivot axis from its first end to its second end, and comprising a portion straight pathway terminating at the first end and a curved path portion adjacent to the straight path portion and terminating at the second end.
  • the flange is retractable completely automatically.
  • the fixed guide member may then be constituted by a pair of pins or rollers attached to the cylinder body and respectively engaged in the grooves forming the cam.
  • the movable support element is for example constituted by a bearing heel carried by the flange and extending symmetrically on either side of a median plane of the flange and the rod, transverse to the axis pivoting, the fixed support element then itself being constituted by a bearing surface of the cylinder body, on which the bearing heel bears symmetrically with respect to said median plane.
  • the jack is a double-acting jack, for example hydraulic, comprising first and second chambers separated by a piston integral with the rod, the flange being driven from its release position to its clamping position by admission of fluid under pressure into the first chamber of the jack, and being driven from its position clamping to its release position by admission of fluid under pressure in the second chamber of the cylinder.
  • the fixed guide member and the fixed support member may be carried by a portion of the cylinder body which is shaped as a yoke, the flange being guided in its median plane between two parallel faces vis-à-vis this part forming a screed.
  • the flange is for example shaped as a yoke and encloses the body of the jack which guides it in its median plane.
  • each pin or roller is advantageously located above a plane transverse to the rod containing the pivot axis, in a direction corresponding to the movement that the rod makes to drive the flange to its release position .
  • a perfect retraction of the flange can be obtained by providing that the flange rotates at least equal to 90 degrees between its clamping position and its release position.
  • the invention also relates, according to a second of its aspects, to a control method of the device previously described, this method being characterized in that it comprises an operation consisting of measuring the pressure of the actuating fluid admitted into this device and check the position of the flange and / or the clamping force by checking the value of the measured pressure.
  • the invention relates to a device for clamping a workpiece P on a tool for machining thereof, this device essentially comprising a jack 1 and a clamp 2.
  • the jack 1 is for example constituted by a double-acting hydraulic jack and comprises a body 10 fixed in operation to the tool itself placed in a machining center, and a rod 11 movable relative to the body 10 of this jack .
  • the body 10 of the jack has a bore inside which a piston 12, integral with the rod 11, defines two chambers 101 and 102 of variable and complementary volumes, opening on the outside by means of respective ports 101p and 102p each of which can be connected to a high pressure hydraulic source while the other is connected to a low pressure reservoir.
  • the flange 2 which is articulated on the rod 11 about a pivot axis X, is driven at will by the rod 11, itself driven by the piston 12.
  • the flange 2 thus struggles, on a determined stroke, between a clamping position illustrated in particular in FIGS. 1 to 3, and a release position, illustrated in Figure 4 for the first embodiment, and in Figure 11 for the second embodiment.
  • the flange 2 is driven from its release position to its clamping position by admission of fluid under pressure in the first chamber 101 of the cylinder 1, and is driven from its clamping position to its release position by admission of fluid under pressure in the second chamber 102 of this cylinder 1.
  • the device of the invention derives most of its advantages from the fact that it comprises guide members 3 and bearing elements 4, the guide members 3 themselves comprising a guide member 31 fixed with respect to the body 10 and a movable guide member 32 connected to the flange 2, and the support elements 4 comprising, in the same way, a support member 41 fixed relative to the body 10 and a movable support member 42 connected at the flange 2.
  • the fixed and movable guide members, 31 and 32 cooperate to drive the flange 2 in a rotational movement about the pivot axis X at least at the end of the stroke of this flange towards its release position, and for driving the flange 2 in a translation movement at least at the end of the stroke of this flange to its clamping position.
  • the fixed and mobile support elements, 41 and 42 cooperate, at least at the end of the stroke of the flange 2 towards its clamping position, to afford each other, at a distance from the guide members 3 , a sliding contact parallel to the translational movement of the flange 2 and allowing a bracing of the flange 2 on the part to be clamped P.
  • the rod 11 preferably extends along a translation axis Z which passes between the guide members 3 and the support elements 4.
  • the movable guide member 32 is constituted by a cam formed of two grooves, such as 32a, hollowed symmetrically in the flange 2 on either side of a median plane M of the device , this median plane M being transverse to the pivot axis X and constituting a plane of symmetry for the flange 2 and for the rod 11.
  • the flange 2 thus has a groove 32b which, although not visible in the figures, is deduced from the groove 32a by symmetry with respect to the plane M.
  • Each of the grooves 32a and 32b has a path that is continuously approaching the pivot axis X from the first end 321 of this path to its second end 322.
  • this path includes a straight path portion 320r terminating at the first end 321 and a curved path portion 320c adjacent to the straight path portion 320r and terminating at the end. second end 322.
  • the fixed guide member 31 is constituted by a pair of pins or rollers, such as 31a, fixed to the body 10 of the cylinder 1 and respectively engaged in the grooves forming the cam.
  • the body 10 thus has a stud or a roller 31b engaged in the groove 32b and which, although not visible in the figures, is deduced from the stud or roller 31a by symmetry by ratio to the median plane M.
  • each pin or roller such as 31a is located above a plane T which is transverse to the rod 11 and which contains the pivot axis X, when following a direction that corresponds to the movement made by the rod 11 to drive the flange 2 to its release position.
  • the movable support element 42 is constituted by a bearing heel which is carried by the flange 2 and which extends symmetrically on either side of the median plane M of the device.
  • the fixed support element 41 is constituted by an external bearing surface of the body 10 of the cylinder 1, on which the support heel 42 bears symmetrically with respect to the same median plane M.
  • the rod 11 leaves the jack 1 on the side of its first chamber 101.
  • the fixed guide member 31 and the fixed support member 41 are advantageously carried by a portion 100 of the body 10 of the jack which is shaped as a yoke, and the flange 2 is then guided in its median plane M between two parallel faces vis-a-vis, 100a and 100b, belonging to this portion 100 forming a screed.
  • This embodiment allows a large rotation of the flange 2 between its clamping position and its release position, typically a rotation of amplitude equal to or greater than 90 degrees.
  • the jack 1 can in this case be mounted in a base 5 fixed to the tool, forming a fluid distributor, and therefore itself comprising two fluid inlet-outlet ports 101q. and 102q respectively corresponding to the ports 101p and 102p of the jack 1.
  • the rod 11 leaves the jack 1 on the side of its second chamber 102.
  • the flange 2 which is shaped as a yoke, this flange then enclosing the body 10 of the cylinder 1, which guides it in its median plane M.
  • the measured pressure reaches or exceeds a determined minimum threshold, typically to prevent the clamping force from being insufficient, or to provide that the measured pressure remains below a maximum threshold determined for example to prevent the clamping force from damaging the workpiece.
  • this method has the additional advantage of allowing a very fine adjustment of the clamping force in the case where the actuating fluid is constituted by compressed air.

Claims (13)

  1. Vorrichtung zum Klemmen eines Bauteils (P) an einem Gerät, umfassend einen Stellantrieb (1) und ein Klemmteil (2), wobei der Stellantrieb (1) durch ein unter Druck stehendes Fluid betätigbar ist und selbst einen Körper (10), der bei Betrieb an dem Gerät befestigt ist, und einen in Bezug auf den Körper (10) beweglichen Schaft umfaßt, wobei das Klemmteil (2) gelenkig um eine Drehachse (X) an dem Schaft (11) angebracht ist und durch den Schaft (11) bewegbar ist, wobei das Klemmteil (2) sich auf einem bestimmten Weg zwischen der Klemmposition und einer Freigabeposition verschiebt und zumindest über einen Teil des Weges eine Rotation erfährt, dadurch gekennzeichnet, daß die Klemmvorrichtung zudem Führungsorgane (3) und Stützelemente (4) umfaßt, daß die Führungsorgane (3) ein relativ zum Körper (10) ortsfestes Führungsorgan (31) und ein bewegliches Führungsorgan (32) umfassen, das mit dem Klemmteil (2) verbunden ist, wobei das ortsfeste und das bewegliche Führungsorgan (31, 32) zusammenwirken, um das Klemmteil (2) gemäß einer Rotationsbewegung um die Drehachse (X) mindestens am Ende seines Weges in Richtung der Freigabeposition und gemäß einer Translationsbewegung mindestens am Ende seines Weges in Richtung der Klemmposition zu bewegen, und daß die Stützelemente (4) ein relativ zum Körper (10) ortsfestes Stützelement (41) und ein bewegliches Stützelement (42) umfassen, das mit dem Klemmteil (2) verbunden ist, wobei das ortsfeste und das bewegliche Stützelement (41, 42) mindestens am Ende des Weges des Klemmteils (2) in Richtung seiner Klemmposition selektiv zusammenwirken, um gegenseitig in Abstand zu den Führungsorganen (3) einen zur Translationsbewegung des Klemmteils (2) parallelen Gleitkontakt bereitzustellen, und ein Verklemmen des Klemmteils (2) an dem zu klemmenden Bauteil (P) ermöglichen.
  2. Klemmvorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß sich der Schaft (11) entlang einer Translationsachse (Z) erstreckt, die zwischen den Führungsorganen (3) und den Stützelementen (4) hindurchgeht.
  3. Klemmvorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß das bewegliche Führungsorgan (32) aus einer aus zwei Nuten (32a, 32b) gebildeten Nocke besteht, wobei die Nuten symmetrisch auf beiden Seiten einer Mittelebene (M) des Klemmteils quer zur Drehachse (X) in dem Klemmteil (2) ausgehöhlt sind.
  4. Klemmvorrichtung nach einem der vorangehenden Ansprüche kombiniert mit Anspruch 3, dadurch gekennzeichnet, daß jede Nut (32a, 32b) eine Bahn darstellt, deren ersten und zweiten Enden (321, 322) jeweils relativ entfernt und relativ nah der Drehachse (X) sind, wobei sich die Bahn ständig der Drehachse (X) von seinem ersten Ende (321) in Richtung seines zweiten Endes (322) annähert und einen geradlinigen Bahnabschnitt (320r), der an dem ersten Ende (321) endet, und einen gekrümmten Bahnabschnitt (320c) umfaßt, der an dem geradlinigen Bahnabschnitt (320r) angrenzt und an dem zweiten Ende (322) endet.
  5. Klemmvorrichtung nach einem der vorangehenden Ansprüche kombiniert mit Anspruch 3, dadurch gekennzeichnet, daß das ortsfeste Führungsorgan (31) durch ein Paar von Ansätzen oder Rollen (31 a, 31 b) gebildet ist, die an dem Körper (10) des Stellantriebs (1) befestigt sind und jeweils mit den die Nocke bildenden Nuten (32a, 32b) in Eingriff stehen.
  6. Klemmvorrichtung nach einem der vorangegangenen Ansprüche, dadurch gekennzeichnet, daß das bewegliche Stützelement (42) aus einem Stützabsatz (42) besteht, der durch das Klemmteil (2) getragen ist, und sich symmetrisch auf beiden Seiten der Mittelebene (M) des Klemmteils und des Schafts quer zur Drehachse (X) erstreckt, und daß das ortsfeste Stützelement (41) aus einer Stützfläche (41) des Körpers (10) des Stellantriebs (1) besteht, auf die sich der Stützabsatz (42) symmetrisch im Verhältnis zu der Mittelebene (M) abstützt.
  7. Klemmvorrichtung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß der Stellantrieb (1) ein doppeltwirkender Stellantrieb ist, der eine erste und eine zweite Kammer (101, 102) umfaßt, die voneinander durch einen Kolben (12) getrennt sind, der einstückig mit dem Schaft (11) ausgebildet ist, wobei das Klemmteil (2) von seiner Freigabeposition in seine Klemmposition durch Einlaß von Fluid unter Druck in die erste Kammer (101) des Stellantriebs (1) bewegt wird, und von seiner Klemmposition in seine Freigabeposition durch Einlaß von Fluid unter Druck in die zweite Kammer (102) des Stellantriebs (1) bewegt wird.
  8. Klemmvorrichtung nach Anspruch 7, dadurch gekennzeichnet, daß der Stellantrieb (1) ein hydraulischer Stellantrieb ist.
  9. Klemmvorrichtung nach einem der Ansprüche 7 und 8, dadurch gekennzeichnet, daß der Schaft (11) aus dem Stellantrieb (1) auf Seite der ersten Kammer (101) austritt und daß das ortsfeste Führungsorgan (31) und das ortsfeste Stützelement (41) durch einen Teil (100) des Körpers (10) des Stellantriebs getragen sind, der als Abdeckung angepaßt ist, wobei das Klemmteil (2) in seine Mittelebene (M) zwischen zwei parallelen Flächen (100a, 100b) gegenüber dem die Abdeckung bildenden Teil (100) geführt ist.
  10. Klemmvorrichtung nach einem der Ansprüche 7 und 8, dadurch gekennzeichnet, daß der Schaft (11) auf der Seite der zweiten Kammer (102) aus dem Stellantrieb (1) austritt und daß das Klemmteil (2) als Abdeckung angepaßt ist und den Körper (10) des Stellantriebs (1) einschließt, der das Klemmteil in seiner Mittelebene (M) führt.
  11. Klemmvorrichtung nach einem der vorangehenden Ansprüche in Kombination mit Anspruch 5, dadurch gekennzeichnet, daß jeder Ansatz oder jede Rolle (31a, 31b) über einer die Drehachse (X) umfassende Ebene (T) quer zu dem Schaft (11) in einer Richtung angeordnet ist, die der Bewegung entspricht, die der Schaft (11) ausführt, um das Klemmteil (2) in seine Freigabeposition zu bewegen.
  12. Klemmvorrichtung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß das Klemmteil (2) eine Drehung von mindestens 90° zwischen seiner Klemmposition und seiner Freigabeposition durchführt.
  13. Verfahren zur Steuerung einer Vorrichtung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß es einen Arbeitsschritt umfaßt, der aus dem Messen des Drucks des Betätigungsfluids, die in der Vorrichtung zugelassen ist, und dem Kontrollieren der Position des Klemmteils und/oder der Klemmkraft durch Überprüfen des gemessenen Druckwertes besteht.
EP04805643A 2003-12-04 2004-12-03 Schnellklemmvorrichtung und steuerverfahren Active EP1697088B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0314358A FR2863190B1 (fr) 2003-12-04 2003-12-04 Dispositif de serrage precis a actionnement rapide
PCT/FR2004/003124 WO2005056241A1 (fr) 2003-12-04 2004-12-03 Dispositif de serrage precis a actionnement rapide, et procede de commande

Publications (2)

Publication Number Publication Date
EP1697088A1 EP1697088A1 (de) 2006-09-06
EP1697088B1 true EP1697088B1 (de) 2007-05-23

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP04805643A Active EP1697088B1 (de) 2003-12-04 2004-12-03 Schnellklemmvorrichtung und steuerverfahren

Country Status (6)

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EP (1) EP1697088B1 (de)
AT (1) ATE362827T1 (de)
DE (1) DE602004006647T2 (de)
ES (1) ES2287803T3 (de)
FR (1) FR2863190B1 (de)
WO (1) WO2005056241A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022238527A1 (fr) 2021-05-14 2022-11-17 Christophe Boiteux Dispositif de bridage

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009107076A (ja) 2007-10-31 2009-05-21 Smc Corp クランプ装置
FR2989297B1 (fr) 2012-04-12 2015-03-13 Christophe Boiteux Dispositif de serrage d'une piece sur un outillage
FR3023738B1 (fr) * 2014-07-17 2016-07-29 Christophe Boiteux Systeme de maintien angulaire avec utilisation de coin a renvoi
FR3039447B1 (fr) * 2015-07-31 2017-08-25 Christophe Boiteux Dispositif de serrage d'une piece sur un outillage

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3482830A (en) * 1966-04-05 1969-12-09 Jack J Sendoykas Clamp
US3618931A (en) * 1970-01-19 1971-11-09 Leland F Blatt Cam wedge power clamp
US4494739A (en) * 1983-03-04 1985-01-22 State Die & Engineering, Inc. Power operated rotatable clamping assembly
US6115898A (en) * 1995-06-06 2000-09-12 Btm Corporation Force multiplying apparatus for clamping a workpiece and forming a joint therein
US6059277A (en) * 1998-05-05 2000-05-09 Btm Corporation Retracting power clamp

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022238527A1 (fr) 2021-05-14 2022-11-17 Christophe Boiteux Dispositif de bridage
FR3122843A1 (fr) 2021-05-14 2022-11-18 Christophe Boiteux dispositif de bridage

Also Published As

Publication number Publication date
WO2005056241A1 (fr) 2005-06-23
FR2863190A1 (fr) 2005-06-10
ATE362827T1 (de) 2007-06-15
ES2287803T3 (es) 2007-12-16
EP1697088A1 (de) 2006-09-06
DE602004006647D1 (de) 2007-07-05
FR2863190B1 (fr) 2006-02-03
DE602004006647T2 (de) 2008-01-31

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