EP1274538B1 - Stiftfoermiges werkzeug zum zentrieren und spannen - Google Patents

Stiftfoermiges werkzeug zum zentrieren und spannen Download PDF

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Publication number
EP1274538B1
EP1274538B1 EP01923777A EP01923777A EP1274538B1 EP 1274538 B1 EP1274538 B1 EP 1274538B1 EP 01923777 A EP01923777 A EP 01923777A EP 01923777 A EP01923777 A EP 01923777A EP 1274538 B1 EP1274538 B1 EP 1274538B1
Authority
EP
European Patent Office
Prior art keywords
tool
clamping
clamping members
cam
actuator
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
EP01923777A
Other languages
English (en)
French (fr)
Other versions
EP1274538A1 (de
Inventor
Michel Beffrieu
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.)
Finuchem Technologies de Soudage
Original Assignee
FINUCHEM TECHNOLOGIES DE SOUDA
Finuchem Technologies de Soudage
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 FINUCHEM TECHNOLOGIES DE SOUDA, Finuchem Technologies de Soudage filed Critical FINUCHEM TECHNOLOGIES DE SOUDA
Publication of EP1274538A1 publication Critical patent/EP1274538A1/de
Application granted granted Critical
Publication of EP1274538B1 publication Critical patent/EP1274538B1/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
    • B25B5/12—Arrangements for positively actuating jaws using toggle links
    • B25B5/122—Arrangements for positively actuating jaws using toggle links with fluid drive

Definitions

  • the present invention relates to the field of centering and clamping tools for handling parts to be fixed in position such as sheets and, more particularly, a tool for centering and clamping at least one part having a through passage and adjusted for said tool, of the type comprising a pilot member carried at the end of a housing, clamping members and means for driving the clamping members between a centering position in which they are erased in the pilot member and a plurality of clamping positions in which the clamping members protrude outside the pilot member and resting on the workpiece (see for example EP-A-0 911 112).
  • Known clamping tools generally comprise a hydraulic or pneumatic cylinder for actuating a clamping member such as a clamping arm which is pivotally drivable between an active clamping position on the workpiece and an inoperative position.
  • a clamping member such as a clamping arm which is pivotally drivable between an active clamping position on the workpiece and an inoperative position.
  • Such a tool may also include a driver which is introduced into a passage in the workpiece, which allows to center the workpiece correctly on the tool.
  • FR-A-2,340,798 discloses a clamping tool including a clamping arm abuts against the workpiece to be clamped by pivotally driving the clamping arm. This pivoting drive of the clamping arm between the loosening position and the clamping position is obtained by means of an articulated linkage mounted on a rod driven in linear displacement by a jack.
  • the point of contact of the clamping arm on the workpiece is relatively distant from the centering point of the tool on said workpiece, which can cause a certain imbalance or requires a more complex structure of the tool.
  • Such a tool comprises an indexing device of a part through a hole of this part and comprising a sleeve having an upper face forming a support for the part, a piston mounted in the sleeve to slide under the effect of driving means between a retracted position inside the sleeve and an extended position in which it projects from the upper bearing face of the sleeve by an end portion forming an indexing pin, a jaw clamping the workpiece on the upper bearing surface of the sleeve, mounted movably on the centering pin and means for controlling the jaw comprising a slide mounted in an axial bore of the piston and having a cam end.
  • control means are constituted by a slider mounted in an axial bore of the piston for sliding under the effect of the drive means between a first position in which it ensures the locking of the jaw in its active position by means of a part active cam member pivotally driving the clamping jaws to said operative position and a second position in which it releases the lock of said jaw by controlling the pivoting of the clamping jaws to the inactive position.
  • the drive means comprise inter alia a first return spring disposed between the piston and the sleeve to return the piston towards its extended position and a second return spring disposed between the sleeve and the slide to return the slide to its unlocked position. of the jaw.
  • this structure is relatively complicated and wear, particularly spring expansion, can cause problems of correct positioning of the jaws over time.
  • the application WO-A-98/28110 filed by the applicant describes a centering and clamping tool comprising a pilot member, clamping members and means for driving the clamping members simultaneously causing said members to pivot and translate. of Tightening.
  • These drive means consist in particular of two levers forming a deformable axis about their connecting axis under the effect of a jack.
  • Such a centering and clamping tool makes it possible to correctly position the clamping members on the part to be fixed during the centering step carried out by placing the pilot member through the through and fitted passage of the workpiece. and the pivoting drive of the clamping members allows the protruding drive of said clamping members out of the pilot member and their lowering on either side of the pilot member to bear against the workpiece to be fixed. position, the drive in translation and in simultaneous pivoting of said clamping members causing the clamping of the workpiece to be fixed in position against the end of the housing, on the upper face of said support casing.
  • it ensures a perfect deployment clamping members protruding from the pilot member and a plurality of clamping positions is obtained on the workpiece to be fixed.
  • the clamping tools are calibrated to treat a workpiece of a given thickness and can not treat a workpiece of another thickness without incurring, in the event of a different thickness, a risk of punching the workpiece. the treated room. It is then necessary to change the centering tool and clamping by another adapted to treat this new thickness.
  • a centering and clamping tool which comprises a fixing support comprising a support piece provided with a chimney in which is mounted the pilot member, the pilot member being projecting at the free end constituting the bearing face of the workpiece, while the body of the tool is clamped against a face of the support opposite to the bearing face.
  • a removable wedge which makes it possible to vary the gap between the bearing face and the clamping means deployed outside the pilot member. It is thus possible to treat, by simple change of the wedge, several pieces of different thicknesses.
  • Such a tool is advantageous because it allows not to change tools to treat parts of different thicknesses but it still requires manipulation to adapt the tool to the new part.
  • the present invention proposes a centering and clamping tool that can process parts of different thicknesses without requiring the tool to be changed or manipulated to adapt it to the thickness of the tool. new room.
  • the subject of the invention is a tool for centering and clamping at least one workpiece to be fixed in position and having a through passage and adjusted for said tool, of the type preferably comprising a pilot member brought to the end of a housing having an upper face forming a support for said part and clamping members, further comprising means for driving the clamping members between a centering position in which the clamping members are removed at inside the pilot member and a plurality of clamping positions in which the clamping members are projecting outside the pilot member and resting on the workpiece, the clamping members being constituted by two levers articulated about a median axis to form a deformable X, each lever having a first free end coming into bearing on the part to be fixed, their second end being connected to the drive means, characterized in that the drive means consist of two connecting rods, one end of which is articulated on said second end of the levers by means of a hinge pin, the connecting rods being disposed on either side of a cam having on each side two diverging cam profiles substantially
  • the clamping members are retracted into the pilot member, which allows easy introduction of the tool into the through passage of the workpiece.
  • the hinge pins of the rods on the clamping members bearing against the same wall of the cassette also slide along this wall and drive in translation the clamping members to the groove where the hinge pins can be housed .
  • the cam continues its linear movement under the effect of the jack and the pivoting of the studs against the cam profiles then causes the displacement of the articulation pins in the groove, which causes the spacing of the clamping members until these, deployed on both sides of the pilot body, bear against the part to fix.
  • the drive means cease their action as soon as the clamping members are resting on the part while ensuring a certain tightening, the force of the jack being calibrated so that it does not oppose the mechanical blocking of the clamping members coming into support on the part or, preferably, under the control of detection means.
  • the clamping members are erased in the pilot member which has a slot for this purpose.
  • This slot communicates the inside of the clamping and centering tool with the outside. In particular, it makes accessible the clamping members and the drive means.
  • a tool according to the invention makes it possible to treat parts of different thicknesses at the same station and without manipulation or adjustment of said tool.
  • the pilot member is partially retractable and the driving means of said pilot member between its retracted position and its protruding position are the same as the driving means of the clamping members.
  • the pilot member is connected to at least one connecting rod by means of one of its studs resting on a cam profile so that, during the actuating stroke of the cam by the jack , the pilot tool is driven in linear translation with the clamping members to its centering position of the workpiece. Then, the clamping members unfold and come close behind the fallen edge of the through passage of the part to fix if there is one.
  • a pneumatic cylinder, a hydraulic cylinder or an electric cylinder are used as well.
  • the centering and clamping tool 1 comprises a casing 2 enclosing a pneumatic supply device for the drive means comprising a distributor 3 and a distribution block 4 connected to a jack 5 of the drive means .
  • a flange 9 forming a support for the workpiece.
  • the body 6 contains a cassette 10 consisting of two identical half-housings 11 between which are housed the drive means of the clamping members 8.
  • a face 2a of the casing 2 serves to fix said tool 1 in a standard manner.
  • the tool also comprises means 13 for detecting the state of the engaged tool or uncommitted tool.
  • the drive means which consist of a cam 14 and two connecting rods 15.
  • the cam 14 is connected to the jack 5 by means of a yoke 16.
  • Drug. 14 has on each side two diverging cam profiles 14a and 14b, said cam 14 having substantially the shape of a rhombus.
  • the rods 15 are placed on either side of the cam 14 and each have two studs 15a and 15b respectively bearing against the profile 14a and the profile 14b of the cam 14.
  • Each connecting rod 15 further comprises a stud 15c bearing against a linear wall 10 'of the cassette 10 and more precisely against a wall of a half-casing 11 and against a wall of the other half-casing 11.
  • This wall 10 linear is parallel to the sliding axis xx 'of the cylinder rod 5.
  • the end of the rods 15 opposite the end of the side of the yoke 16 is hinged to the clamping members 8 by means of a hinge pin 17.
  • the clamping members are constituted by two levers 8 articulated around a median axis 8c to form a deformable X, each lever 8 having a hook-shaped first end 8a bearing on the piece to be fixed P and the second end 8b being connected to a lever 15.
  • the levers 8 are preferably bent around their articulation axis 8c.
  • the hook shape of the end 8a of the levers 8 allows easy crossing of a flanged sheet metal section at the through passage of the piece P.
  • the pilot member 7 is positioned opposite a through passage 19 formed in the part to be fixed P.
  • the pilot member 7 has not been shown. in Figures 2, 3 and 4.
  • the pilot member 7 is partially retractable and is drivable between its retracted position and its centering position by the driving means of the clamping members. Thus, the pilot member 7 is connected to the connecting rods 15 by means of the studs 15b engaged in notches 7a of said pilot member 7 (see FIGS. 6a and 6b).
  • the pilot member 7 positioned relative to the workpiece P, it can actuate the drive means of the clamping members 8 which are retracted into said pilot member 7.
  • the rod of the actuator 5 is deployed. in order to drive the cam 14 in the direction A towards the piece P.
  • the cam 14 tends to slide against the studs 15a and 15b of the rods 15 which bear respectively on these diverging cam profiles 14a and 14b.
  • the studs 15b are pushed towards the outside of the cassette 10 while the studs 15a are brought inwards, which induces a pivoting movement of each rod 15.
  • the studs 15c of each link 15 and the hinge pins 17 resting against the walls 10 'of the cassette 10, transform the pivoting translation of the rods 15 with the cam 14.
  • each link 15 pivots under the effect of the cam 14, the cam profiles 14a and 14b moving against the pads 15a and 15b, and the pin articulation 17 guided in the groove 18 causes the spacing of the ends 8b of the clamping members 8 and the deformation of the X to lower the ends 8a on the piece P until they bear on the piece P .
  • the stroke of the cylinder rod 5 is different depending on the thickness of the part P, the stroke of the cylinder 5 being stopped as soon as the ends 8a rest on the workpiece P.
  • the stroke in the groove 18 is adjustable so as to determine the two extreme clamping positions of the tool 1 between which is defined a plurality of clamping position.
  • the adjustment means consist of a screw 20 engaged in said groove 18 from outside the cassette 10 and therefore easily adjustable.
  • the cam 14 pivots the levers 8 and the rods 15 until the pins articulation 17 is disengaged from the groove 18, and then moves the rods 15 and the 8 translation clamping in the direction of the arrow B and thus brings the pilot member 7 in the retracted position.
  • the cam 14 has, on each side, between the two cam profiles 14a and 14b a redent 14c which abuts against the stud 15a on the side of the jack 5.
  • the tool 1 according to the invention comprises means making it possible to ensure the safety of said tool even in the event of a break in the supply of the jack 5.
  • the yoke 16 is connected to the cassette 10 by means of two bistable springs 21, each spring 21 being pivotally mounted on said cassette 10 and on the yoke 16 and, in the clamping position and in the retracted position of the clamping members 8, the springs 21 are in a stable position (see Figures 3, 4 and 5) and, during actuation of the cylinder, are in the non-stable position.
  • the displacement drive of the yoke 16 causes the springs 21 to pivot relative to their point of attachment in the cassette 10, which leads to a compression of the springs 21.
  • the springs 21 are constituted by corrugated blades which provides a sufficient return force with a small footprint.
  • the jack 5 is pneumatic, or hydraulic or electric.

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

Claims (15)

  1. Werkzeug (1) zum Zentrieren und zum Spannen bzw. Anziehen bzw. Festziehen von wenigstens einem Stück (P), das in Position festzulegen ist und einen querenden Durchgang (19) umfaßt und für das Werkzeug (1) eingestellt ist, der Art umfassend vorzugsweise ein Steuer- bzw. Regelorgan (7), das an einem Ende eines Gehäuses bzw. Kastens (2) abgestützt bzw. getragen ist, welches eine obere Seite aufweist, die eine Abstützung bzw. einen Anschlag für das Stück (P) ausbildet, und Spannmittel bzw. -organe (8), die unter anderem Mitnahmemittel (5, 14, 15) der Spann- bzw. Anzieh- bzw. Festziehorgane (8) zwischen einer Zentrierungsposition, in welcher die Spannorgane im Inneren bzw. zwischen des Steuer- bzw. Regelorgans (7) zurückgestellt bzw. -gebogen sind, und einer Mehrzahl von Spannpositionen umfassen, in welchen die Spannorgane (8) vom Äußeren des Steuer- bzw. Regelorgans (7) vorragen und in Anlage auf dem Stück (P) sind, wobei die Spannorgane aus zwei Hebeln (8) gebildet sind, die um eine Mittelachse (8c) angelenkt sind, um ein deformierbares X auszubilden, wobei jeder Hebel (8) ein erstes freies Ende (8a) aufweist, welches auf dem festzulegenden Stück (P) in Anschlag gelangt bzw. auf diesen abgestützt sind, wobei ihr zweites Ende (8b) mit den Mitnahmemitteln (5, 14, 15) verbunden ist,
    dadurch gekennzeichnet, daß die Mitnahmemittel aus zwei Gliedern bzw. Bedienstangen bzw. Antriebsstangen (15) gebildet sind, von welchen ein Ende an dem zweiten Ende (8b) der Hebel (8) durch Zwischenschaltung einer Gelenk- bzw. Anlenkwelle bzw. eines Stifts bzw. Dorns bzw. Spindel (17) angelenkt sind, wobei die Glieder bzw. Zwischenglieder (15) voneinander durch einen Nocken (14) getrennt sind, welcher an jeder Seite zwei divergierende Nockenprofile (14a, 14b) aufweist, welche im wesentlichen einen Rhombus bilden und in linearer Translation unter dem Effekt einer Schraubenspindel bzw. Hubvorrichtung (5) mitnehmbar sind, wobei jedes Glied (15) eine erste Steckstelle bzw. Kontakt (15c) in Anschlag bzw. Anlage und verlagerbar entlang einer Wand (10') einer Kassette (10), die die Mitnahmemittel umschließt, und parallel zur Gleitachse der Schraubenspindel (5) umfaßt, wobei zwei weitere Steckstellen bzw. Kontakte (15a, 15b) entsprechend in Anschlag bzw. Abstützung entlang eines Nockenprofils (14a, 14b) sind, während die Gelenkwelle (17) des Glieds (15) auf dem Hebel (8) in Anschlag bzw. Abstützung und verlagerbar entlang der Wand (10') der Kassette (10) ist und in einer querverlaufenden Rille (18) vorzugsweise senkrecht zur Wand (10) anordenbar ist, um die Annäherung und Entfernung der Hebel (8) entlang einer Mehrzahl von Positionen zwischen zwei Extrempositionen zu ermöglichen, wobei die Gleitmitnahme des Nocken (14) durch die Schraubenspindel (5) eine Translations-Mitnahme der Glieder (15) und der Spannorgane (8) bewirkt, bis die Gelenkwellen (17) entsprechend in einer Rille (18) derart vorliegen, um eine Mitnahme unter Verschwenkung der Spannorgane (8) durch ein Gleiten der Gelenkwellen (17) in der entsprechenden Rille (18) zu provozieren bzw. verursachen.
  2. Werkzeug nach Anspruch 1,
    dadurch gekennzeichnet, daß der Nocken (14) auf der Schraubenspindel (5) durch Zwischenschaltung einer Abdeckung bzw. Kappe bzw. Gabelgelenk (16) festgelegt ist.
  3. Werkzeug (1) nach einem der Ansprüche 1 und 2,
    dadurch gekennzeichnet, daß der Nocken (14) einen Absatz bzw. Rücksprung (14c) zwischen den zwei Nockenprofilen (14a, 14b) aufweist, welcher einen Anschlag für die Steckstelle bzw. Kontakt (15a) ausbildet, die auf der Seite der Schraubenspindel (5) angeordnet ist.
  4. Werkzeug (1) nach einem der Ansprüche 1 bis 3,
    dadurch gekennzeichnet, daß die Tiefe der Rille (18) regulierbar bzw. einstellbar ist.
  5. Werkzeug (1) nach Anspruch 4,
    dadurch gekennzeichnet, daß das Regulierungsorgan von einer Schraube (20) gebildet ist.
  6. Werkzeug (1) nach Anspruch 5,
    dadurch gekennzeichnet, daß die Hebel (8) um ihre Gelenkachse (8c) knieförmig abgewinkelt bzw. gekrümmt bzw. gekröpft sind und ihr Ende (8a), welches in Anschlag auf das Stück (P) gelangt, die Form eines Hakens aufweist.
  7. Werkzeug (1) nach einem der Ansprüche 1 bis 6,
    dadurch gekennzeichnet, daß die Abdeckung (16) mit der Kassette (10) durch Zwischenschaltung von zwei bistabilen Federn (21) verbunden ist, wobei jede Feder (21) schwenkbar auf der Kassette und auf der Abdeckung (16) festgelegt ist und eine stabile Position in einer Ruheposition des Werkzeugs und einer Spannposition des Werkzeugs einnimmt.
  8. Werkzeug (1) nach Anspruch 7,
    dadurch gekennzeichnet, daß die Federn (21) aus gewellten Lamellen bzw. Blättchen bzw. Klingen gebildet sind.
  9. Werkzeug (1) nach einem der Ansprüche 1 bis 8,
    dadurch gekennzeichnet, daß das Steuerorgan (7) teilweise einklappbar bzw. einziehbar ist und daß die Mitnahmemittel des Steuergarns (7) zwischen seiner eingeklappten Position und seiner vorragenden Position dieselben sind wie die Mitnahmemittel der Spannorgane (8).
  10. Werkzeug (1) nach Anspruch 9,
    dadurch gekennzeichnet, daß das Steuerorgan (7) in Verbindung mit wenigstens einen Glied (15) durch Zwischenschaltung von einer (15b) ihrer Steckstellen bzw. Kontakten in Anlage bzw. in Abstützung auf einem Nockenprofil (14b) derart ist, daß während der Betätigung bzw. Betätigungslauf des Nockens (14) durch die Schraubenspindel (5) das Steuerwerkzeug (7) in linearer Translation mit den Spannorganen (8) zu seiner Zentrierposition des Stücks (P) mitgenommen ist.
  11. Werkzeug (1) nach einem der Ansprüche 1 bis 8,
    dadurch gekennzeichnet, daß das Steuerorgan (7) vorragend in bezug auf die Kassette (10) festgelegt ist.
  12. Werkzeug (1) nach einem der Ansprüche 1 bis 11,
    dadurch gekennzeichnet, daß es Detektionsmittel (13) der ergriffenen bzw. eingegriffenen oder nicht ergriffenen bzw. nicht eingegriffenen Position des Werkzeugs (1) umfaßt.
  13. Werkzeug (1) nach einem der Ansprüche 1 bis 12,
    dadurch gekennzeichnet, daß die Schraubenspindel (5) pneumatisch ist.
  14. Werkzeug (1) nach einem der Ansprüche 1 bis 12;
    dadurch gekennzeichnet, daß die Schraubenspindel (5) hydraulisch ist.
  15. Werkzeug (1) nach einem der Ansprüche 1 bis 12,
    dadurch gekennzeichnet, daß die Schraubenspindel (5) elektrisch ist.
EP01923777A 2000-04-12 2001-04-10 Stiftfoermiges werkzeug zum zentrieren und spannen Expired - Lifetime EP1274538B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR0004729 2000-04-12
FR0004729A FR2807685B1 (fr) 2000-04-12 2000-04-12 Outil de centrage et de serrage
PCT/FR2001/001089 WO2001078942A1 (fr) 2000-04-12 2001-04-10 Outil pilote de centrage et de serrage

Publications (2)

Publication Number Publication Date
EP1274538A1 EP1274538A1 (de) 2003-01-15
EP1274538B1 true EP1274538B1 (de) 2006-06-14

Family

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Application Number Title Priority Date Filing Date
EP01923777A Expired - Lifetime EP1274538B1 (de) 2000-04-12 2001-04-10 Stiftfoermiges werkzeug zum zentrieren und spannen

Country Status (7)

Country Link
EP (1) EP1274538B1 (de)
AR (1) AR028000A1 (de)
AT (1) ATE329725T1 (de)
AU (1) AU2001250468A1 (de)
DE (1) DE60120673D1 (de)
FR (1) FR2807685B1 (de)
WO (1) WO2001078942A1 (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10138786C1 (de) * 2001-08-07 2002-10-31 Benteler Automobiltechnik Gmbh Vorrichtung zur Lagefixierung eines Werkstücks an einer Werkstückaufnahme
US7490532B2 (en) * 2003-06-02 2009-02-17 Norgren Automotive, Inc. Rotatably adjustable apparatus for locating a workpiece
GB2443170B (en) * 2006-10-27 2008-09-03 Felim Patrick Mcneela Work piece holding system
CN102633160B (zh) * 2012-04-19 2013-12-04 江苏江海机械有限公司 渔网织机梭盘收线机自动绕线装置
CN110900071A (zh) * 2019-11-26 2020-03-24 湖南杰希重工有限公司 一种内撑式定位夹紧机构

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2757437B1 (fr) * 1996-12-24 1999-02-26 Bruyn Gerard De Outil pilote de centrage et serrage
DE29718643U1 (de) * 1997-10-21 1997-12-11 Tuenkers Maschinenbau Gmbh Druckmittelbetätigbare kombinierte Zentrier- und Spannvorrichtung, insbesondere zur Verwendung im Karosseriebau der Kfz-Industrie

Also Published As

Publication number Publication date
EP1274538A1 (de) 2003-01-15
AU2001250468A1 (en) 2001-10-30
FR2807685A1 (fr) 2001-10-19
AR028000A1 (es) 2003-04-23
FR2807685B1 (fr) 2002-08-02
WO2001078942A1 (fr) 2001-10-25
DE60120673D1 (de) 2006-07-27
ATE329725T1 (de) 2006-07-15

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