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EP1333944B1 - Fast and automated tool-changing device with standard conical tool support for digitally controlled bending machine - Google Patents

Fast and automated tool-changing device with standard conical tool support for digitally controlled bending machine Download PDF

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Publication number
EP1333944B1
EP1333944B1 EP01967461A EP01967461A EP1333944B1 EP 1333944 B1 EP1333944 B1 EP 1333944B1 EP 01967461 A EP01967461 A EP 01967461A EP 01967461 A EP01967461 A EP 01967461A EP 1333944 B1 EP1333944 B1 EP 1333944B1
Authority
EP
European Patent Office
Prior art keywords
clamp
reel
axial
tool
bending
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
EP01967461A
Other languages
German (de)
French (fr)
Other versions
EP1333944A1 (en
Inventor
Joel Etienne
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.)
Numalliance SAS
Original Assignee
Numalliance SAS
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 Numalliance SAS filed Critical Numalliance SAS
Publication of EP1333944A1 publication Critical patent/EP1333944A1/en
Application granted granted Critical
Publication of EP1333944B1 publication Critical patent/EP1333944B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D11/00—Bending not restricted to forms of material mentioned in only one of groups B21D5/00, B21D7/00, B21D9/00; Bending not provided for in groups B21D5/00 - B21D9/00; Twisting
    • B21D11/10—Bending specially adapted to produce specific articles, e.g. leaf springs
    • B21D11/12—Bending specially adapted to produce specific articles, e.g. leaf springs the articles being reinforcements for concrete
    • 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
    • Y10T29/00—Metal working
    • Y10T29/51—Plural diverse manufacturing apparatus including means for metal shaping or assembling
    • 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
    • Y10T409/309352—Cutter spindle or spindle support
    • 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
    • Y10T409/309352—Cutter spindle or spindle support
    • Y10T409/309408—Cutter spindle or spindle support with cutter holder
    • Y10T409/309464—Cutter spindle or spindle support with cutter holder and draw bar

Definitions

  • the present invention relates to a device for changing tools for numerically controlled machine for bending, forming, bending or bending bars or profiles.
  • the main object of the invention is to provide a device for changing tools, fast and automated, which does not exist in the current state of the art for this type of machine.
  • the device according to the invention can in particular but not exclusively apply to numerically controlled machines with erasable nose described in patent application FR 00 04317 of the applicant.
  • the function automatic loosening and clamping of the clamp is secured to the function of axial displacement of the spinner, these functions being performed by the same set of means.
  • the applicant has chosen to use a set already used on other machine tools and for applications of machining namely a standard assembly [conical tool holder (1) and gripper grasping (2)].
  • the tool carrier (1) with its tool (3) is securable (or detachable) by a clamp (2) to a set transmission, called a spinning wheel (4), movements of the electric motor (5) of the numerically controlled machine.
  • the spinner allows in known manner to move the tool holder (1) in translation to move away or position the tool relative to the folding station.
  • the invention consisted in automatically loosening the jaws (6) of the clamp (2) at the end of the travel of the translation movement of the spinner (4), by example according to the embodiment of Figures 1 and 2.
  • a screw-nut system (8) for axially positioning the spinner (4) drives the spool axially toward the motor (5) according to the arrow F 1 .
  • the axis (9) of the screw nut system comes into contact with the end of an axial guide rod (13) of the gripper (2) internally with the spin, and drives said gripper (2) in an axial movement, relative to the spin, according to the arrow F 2 , contrary to F 1 .
  • the gripper approaches the conical stop and the jaws (6), under the effect of a spring located in the clamp and not referenced, deviate in the flared portion of the conical stop (7) thus automatically releasing the end of the tool holder (1).
  • a device commonly used in machine tool machining, and not shown, ensures the exchange of sets [tool holder (1) -tool (3)] from a shop automated.
  • the axial movement of the clamp (2), relative to the spin, according to the arrow F 2 has also had the effect of compressing a spring (10) of tension, between a movable stop (11) of the end of the axial guide rod (13), and a fixed stop (12) of the spin.
  • the function of loosening and automatic tightening of the clamp is secured to the moving function axial numerical of the spinning these functions being performed by the same set means.
  • the clamping and loosening means may for example be driven by cylinders, hydraulic or pneumatic, possibly outside the spin.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Automatic Tool Replacement In Machine Tools (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Wire Processing (AREA)
  • Jigs For Machine Tools (AREA)
  • Automatic Control Of Machine Tools (AREA)
  • Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)

Abstract

A digitally controlled machine for bending, forming, folding or coiling a bar conventionally includes a frame, and a rotary bending tool for producing bends in different planes. A bar is moved along an axis and is brought through a bending snout associated with the frame, and then through a bending tool which is movable relative to the axis by a motor-driven turner. The bending tool is received by a standard conical tool support, and the turner is combined with means for automatically clamping and unclamping the jaws of a gripper associated with the turner. The jaws of the gripper are automatically unclamped when the turner reaches the end of its axial stroke, away from the bending station, and are automatically clamped when the turner begins its axial movement in the opposite direction, toward the bending station.

Description

La présente invention concerne un dispositif de changement d'outils pour machine à commande numérique pour le cambrage, le formage, le pliage ou le cintrage de barres ou de profilés.The present invention relates to a device for changing tools for numerically controlled machine for bending, forming, bending or bending bars or profiles.

L'invention a pour but principal de réaliser un dispositif de changement d'outils, rapide et automatisé, ce qui n'existe pas dans l'état actuel de la technique pour ce type de machine.The main object of the invention is to provide a device for changing tools, fast and automated, which does not exist in the current state of the art for this type of machine.

Le dispositif selon l'invention peut en particulier mais non limitativement s'appliquer aux machines à commande numérique à nez effaçable décrites dans la demande de brevet FR 00 04317 de la demanderesse.The device according to the invention can in particular but not exclusively apply to numerically controlled machines with erasable nose described in patent application FR 00 04317 of the applicant.

L'invention consiste en une machine à commande numérique pour le cambrage, le formage, le pliage ou le cintrage d'une barre, machine comportant classiquement un bâti, un outil de cintrage tournant pour pouvoir obtenir des plis dans différents plans, machine dans laquelle une barre est déplacée selon un axe de défilement et amenée à travers un nez de pliage porté par le bâti puis à travers l'outil de pliage dont le mouvement numérique axial, perpendiculairement à l'axe de défilement est transmis depuis un moteur au moyen d'une tournette, caractérisé en ce que :

  • d'une part l'outil de pliage est porté par un support d'outil conique standard,
  • d'autre part en ce que la tournette est combinée à des moyens automatiques de desserrage des mors de la pince lorsque la tournette arrive en fin de course de son mouvement numérique axial dans le sens de l'éloignement du poste de pliage, et de serrage automatique desdits mors lorsque la tournette débute le mouvement numérique axial en sen inverse, dans le sens du rapprochement du poste de pliage.
The invention consists of a numerically controlled machine for bending, forming, folding or bending a bar, a machine conventionally comprising a frame, a bending tool rotating to obtain folds in different planes, a machine in which a bar is moved along a running axis and fed through a bending nose carried by the frame and then through the bending tool whose axial digital movement, perpendicular to the scroll axis is transmitted from an engine by means of a spinner, characterized in that:
  • on the one hand the folding tool is carried by a standard conical tool holder,
  • on the other hand, in that the spinner is combined with automatic means for loosening the jaws of the gripper when the spool reaches the end of the stroke of its axial digital movement in the direction away from the bending station, and clamping automatic said jaws when the spinning begins the axial digital movement in reverse direction, in the direction of approximation of the folding station.

Selon une variante préférentielle mais non limitative de l'invention, la fonction de desserrage et serrage automatiques de la pince est solidarisée à la fonction de déplacement numérique axial de la tournette, ces fonctions étant réalisées par le même ensemble de moyens.According to a preferred but nonlimiting variant of the invention, the function automatic loosening and clamping of the clamp is secured to the function of axial displacement of the spinner, these functions being performed by the same set of means.

On comprendra mieux l'invention à l'aide de la description ci-après d'un mode de réalisation non limitatif de l'invention, en liaison avec les figures annexées suivantes :

  • figures 1 et 2 : schémas de principe d'un mode de réalisation montrant la pince de préhension du support d'outil respectivement en position serrée et en position desserrée.
The invention will be better understood from the following description of a non-limiting embodiment of the invention, in conjunction with the following appended figures:
  • Figures 1 and 2: block diagrams of an embodiment showing the gripper of the tool support respectively in the tight position and in the released position.

Pour mettre en oeuvre l'invention, la demanderesse a choisi d'utiliser un ensemble déjà utilisé sur d'autres machines outils et pour des applications d'usinage à savoir un ensemble standard [porte-outil conique (1) et pince de préhension (2)].To implement the invention, the applicant has chosen to use a set already used on other machine tools and for applications of machining namely a standard assembly [conical tool holder (1) and gripper grasping (2)].

Selon le mode de réalisation représenté sur les figures, le porte outil (1) avec son outil (3) est solidarisable (ou désolidarisable) par une pince (2) à un ensemble de transmission, appelé tournette (4), des mouvements du moteur électrique (5) de la machine à commande numérique.According to the embodiment shown in the figures, the tool carrier (1) with its tool (3) is securable (or detachable) by a clamp (2) to a set transmission, called a spinning wheel (4), movements of the electric motor (5) of the numerically controlled machine.

En outre, la tournette permet de façon connue de déplacer le porte-outil (1) en translation pour éloigner ou positionner, l'outil par rapport à la station de pliage.In addition, the spinner allows in known manner to move the tool holder (1) in translation to move away or position the tool relative to the folding station.

L'invention a consisté à réaliser automatiquement le desserrage des mors (6) de la pince (2) en fin de course du mouvement de translation de la tournette (4), par exemple selon le mode de réalisation des figures 1 et 2.The invention consisted in automatically loosening the jaws (6) of the clamp (2) at the end of the travel of the translation movement of the spinner (4), by example according to the embodiment of Figures 1 and 2.

En position de serrage de la figure 1, les mors 6 de la pince (1) sont comprimés à l'intérieur de la partie étroite d'une butée conique (7), et enserrent l'extrémité du porte-outil (1).In the clamping position of FIG. 1, the jaws 6 of the clamp (1) are compressed inside the narrow portion of a conical abutment (7), and enclose the end of the tool holder (1).

Un système vis-écrou (8) de positionnement axial de la tournette (4) entraíne la tournette axialement en direction du moteur (5) selon la flèche F1 .A screw-nut system (8) for axially positioning the spinner (4) drives the spool axially toward the motor (5) according to the arrow F 1 .

En fin de course (voir figure 2), l'axe (9) du système vis écrou vient en contact avec l'extrémité d'une tige de guidage axial (13) de la pince (2) intérieurement à la tournette, et entraíne ladite pince (2) dans un mouvement axial, relativement à la tournette, selon la flèche F2, en sens contraire de F1 .At the end of the stroke (see FIG. 2), the axis (9) of the screw nut system comes into contact with the end of an axial guide rod (13) of the gripper (2) internally with the spin, and drives said gripper (2) in an axial movement, relative to the spin, according to the arrow F 2 , contrary to F 1 .

La pince se rapproche de la butée conique et les mors (6), sous l'effet d'un ressort situé dans la pince et non référencé, s'écartent dans la partie évasée de la butée conique (7) libérant ainsi automatiquement l'extrémité du porte-outil (1).The gripper approaches the conical stop and the jaws (6), under the effect of a spring located in the clamp and not referenced, deviate in the flared portion of the conical stop (7) thus automatically releasing the end of the tool holder (1).

Un dispositif, couramment utilisé en machine outil d'usinage, et non représenté, assure l'échange des ensembles [porte-outil (1)-outil (3)] à partir d'un magasin automatisé.A device, commonly used in machine tool machining, and not shown, ensures the exchange of sets [tool holder (1) -tool (3)] from a shop automated.

Ainsi le nombre de rayons de pliage par pièce devient uniquement limité à la variété des outillages en magasin.Thus the number of bending radii per piece becomes only limited to the variety of tools in store.

Le mouvement axial de la pince (2), relativement à la tournette, selon la flèche F2 a également eu pour effet de comprimer un ressort (10) de tension, entre une butée mobile (11) de l'extrémité de la tige de guidage axial (13), et une butée fixe (12) de la tournette. The axial movement of the clamp (2), relative to the spin, according to the arrow F 2 has also had the effect of compressing a spring (10) of tension, between a movable stop (11) of the end of the axial guide rod (13), and a fixed stop (12) of the spin.

Lors du démarrage de retour de la tournette, en sens contraire de la flèche F1 , ce ressort éloignera automatiquement la pince (2) de sa butée conique, produisant un serrage automatique du porte-outil par les mors (6) de ladite pince.When starting spinning back, in the opposite direction of the arrow F 1 this spring will automatically move the clamp (2) away from its conical abutment, producing an automatic clamping of the tool holder by the jaws (6) of said clamp.

Puis, lorsque le ressort (10) atteint sa position normale de tension définie par la longueur de la tige de guidage axial (13) de la pince, l'axe (9) du système vis écrou se détache de l'extrémité de la tige (13), et la pince, dans la suite de son mouvement, exerce sur le cône un effort constant et déterminé par le ressort (10).Then, when the spring (10) reaches its normal position of tension defined by the length of the axial guide rod (13) of the clamp, the axis (9) of the screw nut system detaches from the end of the rod (13), and the clip, in the continuation of its movement, exerts on the cone a constant effort determined by the spring (10).

Dans le mode de réalisation qui vient d'être décrit, la fonction de desserrage et serrage automatiques de la pince est solidarisée à la fonction de déplacement numérique axial de la tournette ces fonctions étant réalisées par le même ensemble de moyens.In the embodiment just described, the function of loosening and automatic tightening of the clamp is secured to the moving function axial numerical of the spinning these functions being performed by the same set means.

On peut prévoir d'autre modes de réalisations dans lesquels la fonction de serrage et de desserrage automatiques de la pince est désolidarisée de la fonction de déplacement numérique axial, ces deux fonctions étant réalisées par des moyens distincts.Other embodiments may be provided in which the function of Clamping and unclamping of the gripper is separated from the function axial displacement, these two functions being realized by means of separate means.

Les moyens de serrage et desserrage peuvent par exemple être entraínés par des vérins, hydrauliques ou pneumatiques, éventuellement extérieurs à la tournette.The clamping and loosening means may for example be driven by cylinders, hydraulic or pneumatic, possibly outside the spin.

Claims (5)

  1. Digitally controlled machine for curving, shaping, folding or bending a bar, said machine conventionally comprising a framework, a rotating bending tool to permit folds to be obtained in different planes, in which machine a bar is displaced along a travel axis and passed through a folding projection carried by the framework, then through the folding tool (3), the axial digital movement of which, perpendicularly to the travel axis, is transmitted from a motor (5) by means of a reel (4) , characterised in that:
    on the one hand, the folding tool (3) is carried by a standard conical tool support (1), and in that,
    on the other hand, the reel is combined with automatic means for releasing bits (6) from the clamp when the reel arrives at the end of the travel path of its axial digital movement, in the sense of moving away from the folding station, and for automatically tightening said bits when the reel commences the axial digital movement in the reverse direction, in the sense of moving towards the folding station.
  2. Machine according to claim 1, characterised in that the function of automatically releasing and tightening the clamp is interlinked with the axial digital displacement function of the reel, these functions being achieved by the same assembly of means.
  3. Machine according to claim 2, characterised in that,
    in the tightened position, the bits (6) of the clamp (2) are compressed by the narrow portion of a conical stop member (7) and grip the end of the support tool holder (1),
    a screw-and-nut system (8) for the axial positioning of the reel (4) entrains the reel axially in the direction of the motor (5) according to an arrow F1,
    at the end of the travel path, the spindle (9) of the screw-and-nut system comes into contact with the end of an axial guiding rod (13) of the clamp (2) internally of the reel, and entrains said clamp (2) in an axial movement relative to the reel, according to an arrow F2,
    the clamp moves closer to the conical stop member, and the bits (6), by the effect of a tension spring situated in the clamp, move away from each other in the widened portion of the conical stop member (7), thereby automatically freeing the end of the tool holder (1), and
    the axial movement of the clamp (2), relative to the reel, according to the arrow F2, has also caused a tension spring (10) to be compressed between a displaceable stop member (11) for the end of the axial guiding rod (13) and a fixed stop member (12) of the reel,
    during the return of the reel, in the opposite direction of the arrow F1, this spring will automatically move the clamp (2) away from its conical stop member, producing an automatic tightening of the tool holder by the bits (6) of said clamp,
    then, when the spring (10) reaches its normal tensioning position defined by the length of the axial guiding rod (13) of the clamp, the spindle (9) of the screw-and-nut system becomes detached from the end of the rod (13), and the clamp, subsequent to its movement, exerts a constant stress, determined by the spring (10), on the cone.
  4. Machine according to claim 1, characterised in that the function of automatically tightening and releasing the clamp is disassociated from the function of axial digital displacement, these two functions being achieved by distinct means.
  5. Machine according to claim 4, characterised in that the tightening and releasing means are entrained by jacks.
EP01967461A 2000-10-31 2001-09-10 Fast and automated tool-changing device with standard conical tool support for digitally controlled bending machine Expired - Lifetime EP1333944B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR0013969A FR2815893B1 (en) 2000-10-31 2000-10-31 FAST AND AUTOMATED TOOL CHANGING DEVICE WITH STANDARD TAPERED TOOL HOLDER FOR NUMERICALLY CONTROLLED CAMBERING MACHINE
FR0013969 2000-10-31
PCT/FR2001/002794 WO2002036280A1 (en) 2000-10-31 2001-09-10 Fast and automated tool-changing device with standard conical tool support for digitally controlled bending machine

Publications (2)

Publication Number Publication Date
EP1333944A1 EP1333944A1 (en) 2003-08-13
EP1333944B1 true EP1333944B1 (en) 2005-06-15

Family

ID=8855931

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01967461A Expired - Lifetime EP1333944B1 (en) 2000-10-31 2001-09-10 Fast and automated tool-changing device with standard conical tool support for digitally controlled bending machine

Country Status (10)

Country Link
US (1) US7124486B2 (en)
EP (1) EP1333944B1 (en)
AT (1) ATE297821T1 (en)
AU (1) AU2001287837A1 (en)
CA (1) CA2427265C (en)
DE (1) DE60111557T2 (en)
ES (1) ES2245375T3 (en)
FR (1) FR2815893B1 (en)
PT (1) PT1333944E (en)
WO (1) WO2002036280A1 (en)

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT316268B (en) 1972-05-02 1974-07-10 Evg Entwicklung Verwert Ges Bending machine for rod or strip material
US3868886A (en) * 1973-07-05 1975-03-04 Ex Cell O Corp Tool holding assembly
DE2739087A1 (en) * 1976-08-30 1978-03-09 Komatsu Mfg Co Ltd MACHINE TOOL
IT1125327B (en) 1979-02-28 1986-05-14 Piegatrici Macch Elettr STAPLING MACHINE
IT1175134B (en) 1983-10-12 1987-07-01 Piegatrici Macch Elettr METHOD AND MEANS FOR THE PRODUCTION OF SHAPES WITH ROUND OR WIRE BENDING MACHINES, PARTICULARLY LAMINATED AT LOW COST HOT ROLLING TO IMPROVE THE QUALITY OF THE FINISHED PRODUCT
US4766756A (en) * 1986-04-28 1988-08-30 Watt Yang Continuous processing machine assembly for bending long rods or tubes
DE3822713A1 (en) 1988-07-05 1990-01-18 Heinz Ruhl DEVICE FOR MACHINING ROD MATERIAL
IT1235177B (en) * 1989-01-18 1992-06-23 Piegatrici Macch Elettr DOWNSTREAM DRIVER GROUP FOLDER GROUP AND TAIL BENDING PROCEDURE.
IT1235176B (en) 1989-01-18 1992-06-23 Piegatrici Macch Elettr UPRIGHT MOBILE SHEAR, FOLDING GROUP AND TAIL BENDING PROCEDURE.
EP0592798B1 (en) 1992-09-15 1997-06-11 M.E.P. Macchine Elettroniche Piegatrici S.p.A. Method to carry out bends and relative devices
FR2715334B1 (en) 1994-01-21 1996-03-08 Automatisation Ste Francaise Machine for bending a material in a substantially straight form.
IT1288994B1 (en) 1996-10-01 1998-09-25 Piegatrici Macch Elettr DOUBLE SHAPING MACHINE WITH MOBILE HOE
IT1296722B1 (en) * 1997-11-26 1999-07-15 Piegatrici Macch Elettr VARIABLE FOLDING GROUP BENDING MACHINE
FR2806943B1 (en) 2000-04-03 2002-08-16 Macsoft ERASABLE FOLDING NOSE BAR BENDING MACHINE

Also Published As

Publication number Publication date
US7124486B2 (en) 2006-10-24
PT1333944E (en) 2005-11-30
DE60111557D1 (en) 2005-07-21
AU2001287837A1 (en) 2002-05-15
WO2002036280A1 (en) 2002-05-10
CA2427265C (en) 2008-02-12
ATE297821T1 (en) 2005-07-15
EP1333944A1 (en) 2003-08-13
FR2815893B1 (en) 2002-12-20
CA2427265A1 (en) 2002-05-10
ES2245375T3 (en) 2006-01-01
FR2815893A1 (en) 2002-05-03
DE60111557T2 (en) 2006-05-11
US20040050136A1 (en) 2004-03-18

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