EP1281480B1 - Spannvorrichtung - Google Patents

Spannvorrichtung Download PDF

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Publication number
EP1281480B1
EP1281480B1 EP02354117A EP02354117A EP1281480B1 EP 1281480 B1 EP1281480 B1 EP 1281480B1 EP 02354117 A EP02354117 A EP 02354117A EP 02354117 A EP02354117 A EP 02354117A EP 1281480 B1 EP1281480 B1 EP 1281480B1
Authority
EP
European Patent Office
Prior art keywords
clamp
top jaw
support
movement
clamping
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
EP02354117A
Other languages
English (en)
French (fr)
Other versions
EP1281480A1 (de
Inventor
Jean-Fabio Colonne
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.)
Application des Nouvelles Technologies du Bois - ANTB
Original Assignee
Application des Nouvelles Technologies du Bois - ANTB
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Filing date
Publication date
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Publication of EP1281480A1 publication Critical patent/EP1281480A1/de
Application granted granted Critical
Publication of EP1281480B1 publication Critical patent/EP1281480B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B25B5/00—Clamps
    • B25B5/06—Arrangements for positively actuating jaws
    • B25B5/061—Arrangements for positively actuating jaws with fluid drive
    • B25B5/062—Arrangements for positively actuating jaws with fluid drive with clamping means pivoting around an axis parallel to the pressing direction

Definitions

  • the present invention relates to a clamping flange according to the preamble of claim 1. It relates to more particularly a clamp for positioning and the maintenance of parts during their machining by machining centers specific working by chip removal.
  • a flange as described in the preamble of claim 1 is known of the prior art, for example, by DE-A-3,334,401.
  • suction cups In the field of wood, several solutions have been developed and particularly vacuum systems such as suction cups or the vacuum tables. However, for some parts machining, the suction surface is too small compared to the cutting force and these vacuum systems are therefore not suitable for this type of work. wooden pieces. Some manufacturers have developed vices pneumatic mounted on suction cup.
  • the present invention aims to remedy aforementioned drawbacks using means, simple, reliable, easy to put implemented and inexpensive. It offers an easy-to-use clamp and who can retract to leave free space for the passage of the cutting tools during machining either at the flange, at the level of support.
  • the clamp of the invention is of the type comprising an upper jaw with a surface of abutment and a lower jaw with a bearing surface, said jaws being movable to move relative to each other along an axis of displacement under the action of biasing means, and is characterized in it includes a retraction device that allows one of the bearing or stop surfaces to retract from a position of where it covers at least partially the other support surface or stop in the direction of movement of the jaws to a free position where she does not cover her anymore and vice versa.
  • the retraction device is implemented by moving the jaws under the action of the means of solicitation.
  • the retraction device is a swivel-type device that allows the flange to be pivoted greater than the other around the axis of movement of the jaws.
  • the biasing means comprise a secondary cylinder which displaces the upper flange relative to the lower support along the axis of displacement.
  • the clamping flange of the invention is characterized in that the displacement of the flange higher is between a low point and a high point and that the pivoting of the upper flange, thanks to the retraction device, occurs when moving it upwards in the vicinity from the high point, and when it goes from a low rest position corresponding to the low point at a high clamping position or Conversely.
  • the retraction device comprises a guide rod and fixed pivoting having a propeller intended to cooperate with a dog of training to rotate it a half-turn when traveling through the stem and its propeller from bottom to top, said clutch comprising notches of training which make it possible to secure it in rotation with a drive plate secured to a cylinder rod which forms part of the upper flange, to obtain the pivoting of the surface of the flange higher when the retraction device is implemented.
  • the cylinder rod which carries a flange to its upper end to form the upper flange, has a internal bore, the upper part of which is intended to allow the passage of the guide rod and pivot and whose lower part constitutes a housing for the driving dog whose dimensions allow the dog to be positioned in the low position engaged where its notches cooperate with the notches of the drive plate attached to the cylinder rod to cause it to pivot during the climb, either in high position where the notches are disengaged to let the dog pivot freely while the cylinder rod is descending along the rod of guiding and pivoting.
  • the solicitation means include a main jack that allows the displacement of the support lower, while said lower support forms the cylinder body of a secondary cylinder whose cylinder rod forms part of the upper flange and in that the retraction device is implemented in a manner automatic by moving the upper flange under the action of the secondary cylinder.
  • the shape of the support and the upper flange is complementary to constitute together a circular profile centered on the axis of movement of the jaws.
  • the shape of the surface of the lower support is a portion of circle smaller than that of the abutment surface of the upper jaw.
  • the present invention relates to a clamping flange carrying the general reference (1). It is more particularly intended for positioning and clamping of parts (2) for their machining by specific machining centers; however, it could be used to other similar applications with minor adaptations without however, to leave the claimed field of protection of the invention.
  • She has a lower support (3) provided with a lower bearing surface (3a) and an upper jaw (4) with an upper clamping surface (4a), said jaws for gripping a piece (2), as shown particularly in FIG. 5.
  • the flange (1) In its clamping position (A), has its upper clamping surface (4a) in line with its surface lower support (3a), while biasing means to solicit them towards each other.
  • the lower support (3) and the upper jaw (4) are movable relative to each other to move along an axis (ZZ ') called axis of movement of the jaws under the action of the means of solicitation.
  • ZZ ' axis of movement of the jaws under the action of the means of solicitation.
  • the clamping flange it has a rounded shape and the axis of displacement (ZZ ') is its axis of revolution, the flange being preferentially intended to be used standing with the axis (ZZ ') disposed at the vertical.
  • the clamping flange (1) comprises a device retraction which makes it possible to move one of the support or clamping (3a, 4a) of the lower support (3) and the upper jaw (4) for that it is no longer in line with the other surface.
  • a device retraction which makes it possible to move one of the support or clamping (3a, 4a) of the lower support (3) and the upper jaw (4) for that it is no longer in line with the other surface.
  • the retraction device is a swivel-type device that can rotate the surface of upper clamping (4a) around the axis of displacement (ZZ ') of the support lower part (3) and the upper jaw (4) so that it no longer covers the direction (ZZ ') the lower bearing surface (3a) of the lower support (3).
  • the retraction device is actuated by the biasing means which handle the movement of the lower support (3) and the upper jaw (4) along the axis (ZZ '). It is thus implemented automatically when moving the lower support (3) and the upper jaw (4) and is therefore not managed independently of these.
  • the biasing means are constituted by a cylinder (5) said cylinder secondary, preferably pneumatic type, which acts on the bit upper (4) to move it relative to the lower support (3) which forms the body of this secondary cylinder.
  • Said displacement of the upper jaw (4) advantageously takes place between a high point (C), illustrated in FIGS. 9c, and a low point (B), illustrated in FIGS. 8a and 9d, corresponding to the position rest.
  • the clamping position (A) illustrated in FIGS. 8d and 9a is located between the high point (C) and the low point (B) in the stroke of the jaw (4) to an intermediate position defined as a function of the workpiece (2) to be clamped.
  • the retraction device is actuated by the moving the upper jaw (4) when it is near the high point (C) in an ascending phase, it makes it possible to rotate the clamping surface (4a) of the jaw (4) so that it does not cover even partially, the bearing surface (3a) of the lower support (3) according to the direction of movement (ZZ ') of lower support (3) and bit higher (4).
  • the retraction device is a mechanical device that is not actuated or implemented only by the movement of the bit (4) under the action of the jack (5) which moves it along the axis (ZZ '). It consists of a stem of guiding and pivoting mechanism (6) which has at its upper end a propeller (7) intended to cooperate with a driving dog (8a) and its drive plate (8b) for rotating a cylinder rod (9) integral with said platen.
  • the cylinder rod (9) carries at its end upper jaw (10) which has on its underside the surface of upper clamping (4a), it forms with said jaw the jaw higher (4).
  • the rod for guiding and pivoting (6) has a rectangular section intended to guide the clutch (8a) which itself has an internal profile similar.
  • the propeller (7) forms a half-turn (180 °), as shown in FIG 7, and causes the half-turn of the driving dog (8a) when go through it.
  • the clutch (8a) is driven in longitudinal displacement towards the high (HA) by the drive plate (8b) which is secured to the rod of cylinder (9), under the action of the secondary cylinder (5).
  • Training notches allow the turntable (8b) and the clutch to rotate (8a) during this climb so that the half-turn of the clutch causes the same movement of the plate (8b) and thus of the rod (9) around the rod for guiding and pivoting (6) which is arranged along the axis of movement of the jaws (ZZ ').
  • the dog, the plate and the bit have reached the high point (C) illustrated in FIGS.
  • the actuator secondary causes them to descend down the guide rod and pivoting (6) while the clutch (8a) deviates from the plate (8b) of disengaging their notches (11a, 11b), leaving the plate (8b) and the rod (9) down along the guide and pivot rod (6) under the action of the jack (5) without pivoting, while the dog (8a) freely undergone the half-turn generated by the helix (7) of the guide rod and pivoting (6) without causing the plate and the jaw in its pivoting, as shown in Figures 8c, 8d and 9c, 9d.
  • the dog (8a) having undergone his U-turn, he returns to position himself on the plate (8b) with his notches in position engaged to be able to be driven by said platen in translation along the rod (6) while transmitting its movement of pivoting during the next ascending phase.
  • the cylinder rod (9) comprises an internal bore whose upper part (12) promotes the passage of the guide rod and of pivoting (6) and whose lower part (13) forms a housing for the dog clutch (8a).
  • This accommodation is of sufficient size to allow the dog to take a low position where it is blocked in rotation by the notches (11b) of the plate (8b) and a high position where its notches (11a) are disengaged from the notches of the plate (8b) allowing it and to rotate freely in its housing during the descent.
  • the flange of clamping (1) comprises a main jack (14) for allowing the movement of the lower support (3) along the axis of displacement (ZZ ').
  • the support (3) which forms the cylinder body of the secondary cylinder (5) which manages the displacement of the upper jaw (4) is also mobile according to the direction (ZZ ') inside the body (16) of the main cylinder (14).
  • support lower part (3) thus forms the piston of the main cylinder and can be retracted down to let the tool pass when it is no longer used.
  • this lower support (3) carries the guide and pivot rod (6) which allows the pivoting of the upper jaw (4).
  • the main and secondary cylinders (5, 14) are cylinders of the type pneumatic whose power is managed by a central control according to information given by the machining center that plants the piece or by sensors arranged on the flange.
  • a central control according to information given by the machining center that plants the piece or by sensors arranged on the flange.
  • he could other types of motorisation, without leaving the field of protection of the invention.
  • the shape of the jaws (10, 15) of the upper jaw (4) and the lower support (3) is complementary to forming a circular profile centered on the axis of movement of the jaws (ZZ '), as shown in Figure 1, when in the rest position.
  • the lower jaw has a bearing surface (3a) whose shape is a portion of a circle smaller than the clamping surface (4a) which corresponds to the other portion of the complementary circle.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jigs For Machine Tools (AREA)
  • Gripping Jigs, Holding Jigs, And Positioning Jigs (AREA)
  • Wire Bonding (AREA)
  • Sampling And Sample Adjustment (AREA)
  • Physical Vapour Deposition (AREA)
  • Manipulator (AREA)

Claims (9)

  1. Spannvorrichtung (1) umfassend eine obere Backe (4) mit einer Spannfläche (4a) und eine untere Auflage (3) mit einer Auflagefläche (3a), wobei die Backen unter der Einwirkung von Vorspannmitteln entlang einer Bewegungsachse (ZZ') relativ zueinander beweglich sind, dadurch gekennzeichnet, dass die Spannvorrichtung eine Einfahreinrichtung aufweist, mit der entweder die Auflage- oder die Spannfläche (3a, 4a) eingefahren werden kann, um so in Bewegungsrichtung der Backen (ZZ') von einer Spannstellung (A), in der sie mindestens teilweise die andere Auflage- oder Anschlagfläche (3a) bedeckt, in eine freie Stellung hineinzugelangen, in der sie diese nicht mehr bedeckt, und umgekehrt, wobei die Einfahrvorrichtung unter der Einwirkung der Vorspannmittel durch die Bewegung der oberen Backe (4) und der unteren Auflage (3) betätigt wird.
  2. Spannvorrichtung (1) nach Anspruch 1, dadurch gekennzeichnet, dass die Einfahreinrichtung eine Schwenkvorrichtung ist, mit der entweder die Auflage- oder die Spannfläche (3a, 4a) gegenüber der anderen der beiden Flächen um die Bewegungsachse der Backen (ZZ') verschwenkt werden kann.
  3. Spannvorrichtung (1) nach einem der vorangegangenen Ansprüche, dadurch gekennzeichnet, dass die Vorspannmittel einen Sekundärzylinder (5) umfassen, der die obere Backe (4) gegenüber der unteren Auflage (3) entlang der Bewegungsachse (ZZ') bewegt.
  4. Spannvorrichtung (1) nach den Ansprüchen 2 und 3, dadurch gekennzeichnet, dass die Bewegung der oberen Backe (4) zwischen einem unteren Punkt (B) und einem oberen Punkt (C) erfolgt, und dass das durch die Einfahreinrichtung (DE) ermöglichte Verschwenken der oberen Backe (4) während der Bewegung derselben nach oben zum oberen Punkt (C) hin erfolgt und dass sie von einer dem unteren Punkt (B) entsprechenden Ruhestellung in eine Spannstellung (A) übergeht und umgekehrt.
  5. Spannvorrichtung (1) nach einem der vorangegangenen Ansprüche, dadurch gekennzeichnet, dass die Einfahreinrichtung eine feststehende Führungs- und Schwenkstange (6) aufweist, die eine Schraube (7) hat, welche mit einer Antriebsklaue (8a) zusammenwirken soll, um diese auf ihrem Weg entlang der Stange und ihrer Schraube um eine halbe Umdrehung zu verschwenken, wobei die Klaue Mitnahmerasten (11a, 11b) aufweist, mit denen diese mit einer einstückig mit einer Zylinderstange (9) verbundenen, teilweise die obere Backe (4) bildenden Antriebsplatte (8b) drehfest verbunden werden kann, um so bei Betätigung der Einfahreinrichtung das Verschwenken der Spannfläche (4a) der oberen Backe (4) zu bewirken.
  6. Spannvorrichtung (1) nach den Ansprüchen 4 und 5, dadurch gekennzeichnet, dass die Zylinderstange (9), die an ihrem oberen Ende eine die obere Backe (4) bildende Klemmbacke (10) trägt, eine Innenbohrung (12, 13) aufweist, durch deren oberen Bereich die Führungs- und Schwenkstange (6) hindurch geführt werden kann und deren unterer Bereich (13) eine Aufnahme für die Antriebsklaue (8a) bildet, deren Abmessungen so gewählt sind, dass die Klaue sich in eine eingerastete untere Stellung einfinden kann, in der ihre Mitnahmeraste (11a) mit den Mitnahmerasten (11 b) der an der Zylinderstange (9) befestigten Antriebsplatte (8b) zusammenwirken, so dass sie geschwenkt und in die obere Stellung bewegt wird, in der die Mitnahmerasten (11a, 11b) außer Eingriff sind, so dass bei der Abwärtsbewegung der Zylinderstange (9) entlang der Führungs- und Schwenkstange (6) die Klaue frei schwenkbar ist.
  7. Spannvorrichtung (1) nach einem der vorangegangenen Ansprüche, dadurch gekennzeichnet, dass die Vorspannmittel einen Hauptzylinder (14) umfassen, mit dem die untere Auflage (3) bewegt werden kann, wobei die untere Auflage (3) den Körper eines Sekundärzylinders (5) bildet, dessen Zylinderstange (9) teilweise die obere Backe (4) bildet, und dass die Einfahrvorrichtung durch die Bewegung der oberen Backe (4) unter der Einwirkung des Sekundärzylinders (5) automatisch betätigt wird.
  8. Spannvorrichtung (1) nach einem der vorangegangenen Ansprüche, dadurch gekennzeichnet, dass die Form der Klemmbacken (10, 15) der unteren Auflage (3) und der oberen Backe (4) einander derart ergänzen, dass sie zusammen ein zentrisch zur Bewegungsachse der Backen (ZZ') angeordnetes kreisförmiges Profil bilden.
  9. Spannvorrichtung (1) nach Anspruch 8, dadurch gekennzeichnet, dass die Form der Auflagefläche (3a) der unteren Auflage (3) ein Kreissegment ist, das kleiner ist als das Kreissegment der Spannfläche (4a) der oberen Backe (4).
EP02354117A 2001-07-30 2002-07-29 Spannvorrichtung Expired - Lifetime EP1281480B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0110167A FR2827803B1 (fr) 2001-07-30 2001-07-30 Bride de serrage
FR0110167 2001-07-30

Publications (2)

Publication Number Publication Date
EP1281480A1 EP1281480A1 (de) 2003-02-05
EP1281480B1 true EP1281480B1 (de) 2005-07-06

Family

ID=8866066

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02354117A Expired - Lifetime EP1281480B1 (de) 2001-07-30 2002-07-29 Spannvorrichtung

Country Status (4)

Country Link
EP (1) EP1281480B1 (de)
AT (1) ATE299074T1 (de)
DE (1) DE60204925T2 (de)
FR (1) FR2827803B1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004053925A1 (de) * 2004-11-05 2006-05-11 Ludwig Ehrhardt Gmbh Spannvorrichtung zum Spannen von Gegenständen
ITUA20162578A1 (it) * 2016-03-25 2017-09-25 Hydroblock S R L Dispositivo per il bloccaggio di pezzi su macchine utensili

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2909464C2 (de) * 1979-03-10 1982-10-28 Fa. Andreas Maier, 7012 Fellbach Schwenkspanner, insbesondere zum Spannen eines Werkstückes auf einem Maschinentisch einer Werkzeugmaschine
DE3201013C2 (de) * 1982-01-15 1984-11-29 Maschinenfabrik Hilma Gmbh, 5912 Hilchenbach Hydraulisch betätigbarer Schwenkspanner
DE3334401A1 (de) * 1983-09-23 1985-04-04 A. Römheld GmbH & Co KG, 6312 Laubach Spann- und stuetzeinheit fuer werkzeugmaschinen
DE3430930A1 (de) * 1984-08-22 1986-03-06 Applied Power, Inc., Milwaukee, Wis. Schwenkspanner
US4620695A (en) * 1984-08-28 1986-11-04 Davan Industries Power clamping apparatus

Also Published As

Publication number Publication date
EP1281480A1 (de) 2003-02-05
FR2827803A1 (fr) 2003-01-31
DE60204925T2 (de) 2006-04-20
FR2827803B1 (fr) 2003-10-10
ATE299074T1 (de) 2005-07-15
DE60204925D1 (de) 2005-08-11

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