EP0703020B1 - Machine d'usinage à dispositifs de fixation de pièce à travailler mobiles - Google Patents

Machine d'usinage à dispositifs de fixation de pièce à travailler mobiles Download PDF

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Publication number
EP0703020B1
EP0703020B1 EP95113809A EP95113809A EP0703020B1 EP 0703020 B1 EP0703020 B1 EP 0703020B1 EP 95113809 A EP95113809 A EP 95113809A EP 95113809 A EP95113809 A EP 95113809A EP 0703020 B1 EP0703020 B1 EP 0703020B1
Authority
EP
European Patent Office
Prior art keywords
control
workpiece
slide
piston
driving
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
EP95113809A
Other languages
German (de)
English (en)
Other versions
EP0703020A3 (fr
EP0703020A2 (fr
Inventor
Eckehart Schulze
Peter Bytow
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.)
Trumpf SE and Co KG
Original Assignee
Trumpf SE and Co KG
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 Trumpf SE and Co KG filed Critical Trumpf SE and Co KG
Publication of EP0703020A2 publication Critical patent/EP0703020A2/fr
Publication of EP0703020A3 publication Critical patent/EP0703020A3/fr
Application granted granted Critical
Publication of EP0703020B1 publication Critical patent/EP0703020B1/fr
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
    • B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
    • B21D43/02—Advancing work in relation to the stroke of the die or tool
    • B21D43/04—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work
    • B21D43/10—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work by grippers
    • B21D43/11—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work by grippers for feeding sheet or strip material
    • 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
    • B21D28/00—Shaping by press-cutting; Perforating
    • B21D28/02—Punching blanks or articles with or without obtaining scrap; Notching
    • B21D28/04—Centering the work; Positioning the tools
    • 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
    • Y10T83/00—Cutting
    • Y10T83/444—Tool engages work during dwell of intermittent workfeed
    • Y10T83/463—Work-feed element contacts and moves with work
    • Y10T83/4632—Comprises a work-moving gripper
    • 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
    • Y10T83/00—Cutting
    • Y10T83/647—With means to convey work relative to tool station
    • Y10T83/654—With work-constraining means on work conveyor [i.e., "work-carrier"]
    • Y10T83/6563—With means to orient or position work carrier relative to tool station
    • 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
    • Y10T83/00—Cutting
    • Y10T83/748—With work immobilizer
    • Y10T83/7487—Means to clamp work
    • Y10T83/754—Clamp driven by yieldable means
    • 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
    • Y10T83/00—Cutting
    • Y10T83/748—With work immobilizer
    • Y10T83/7487—Means to clamp work
    • Y10T83/7547—Liquid pressure actuating means

Definitions

  • the invention relates to a processing machine, in particular Punching machine, with a processing head and a relative to this movable workpiece guide on which at least two the workpiece can be defined and controlled with an energy source related drive means relative to that Workpiece and the workpiece guide movable holding devices are provided for the workpiece,
  • the drive means of Holding devices each have at least one with the workpiece coupled movable switching element in connection with the energy source stand and wherein the switching element is opposite the machining head fixed stop is assigned and the relevant Holding device when the switching element has hit the stop controlled in a position releasing the workpiece and relative to the workpiece in a position with a safety distance is moved by the processing head.
  • the holding devices serve to the workpiece both during the infeed movement and during to fix the machining process in a defined position. At the same time, the must to avoid material loss entire workpiece for the machining head to be accessible. This also applies in particular to the workpiece area that is from the holding devices fixed on the workpiece is.
  • a known machine tool is used for this purpose electrical switches connected to the workpiece guide are provided, the one with an electrohydraulic approach to a dead zone backdrop Valve switches, via which a slide drive for the associated holding device in the form of a hydraulic piston-cylinder unit is operated.
  • the holding device is in one of the machining head Move the remote end position.
  • the electrohydraulic valve is switched to a switch position, in which the hydraulic drive of the holding device moved back to their starting position.
  • the sliding drive are provided mechanically coupled to the holding device Controlled jaws for the workpiece.
  • the object of the invention is now a processing machine to create the one compared to the well-known processing machine accelerated workpiece machining allowed.
  • one Processing machine of the type mentioned the switching element is connected to the associated holding device and one Switch slide has, which is in the run up to the stop Position applied towards the stop supported on this, the slide switch in at least one Slider position the energy source with the drive means of associated holding device connects and in at least one further slide position interrupts this connection.
  • the drive means by which moves the holding devices relative to the workpiece are switched directly by the switching element. Further, switching operations associated with additional switching times are eliminated.
  • the switching element is switched immediately coupled with the relative movement of the respectively assigned Holding device in relation to the workpiece.
  • the slide switch is transferred to a switching position in which the Drive means the holding device in question from the machining head move away.
  • the holding device Once the holding device is in the course of it Move a position outside the danger zone around the machining head reached, moves with the holding device Switch slide a slide position in which the holding device is stopped.
  • the slide switch of the switching element at the corresponding Design of the serving as a dead zone backdrop Stop moved in the opposite direction of its previous movement and finally takes up a switch position in which the concerned Holding device moved back to its original position on the workpiece becomes.
  • the holding devices are on the known machine tool only for safe Circumventing the machining head absolutely necessary distance moved away from the workpiece.
  • the holding devices on the invention The processing machine bypasses the processing head accordingly immediately adjacent to the boundary of its danger zone and can therefore after passing the processing head back on the workpiece within a very short time be determined. All in all, the inventive method Processing machine therefore high processing speeds realize.
  • Machine tools are the fixtures, however in each case by means of a displacement drive with at least one Drive piston-drive cylinder unit as drive means slidable relative to the workpiece and the workpiece guide.
  • the advantageous ones described above can be used Expediently achieve effects in that the drive piston-drive cylinder unit over the switching element with is connected to a drive pressure source, wherein as a switching element a directional control valve with a valve spool as a switching spool is provided, which is in at least one slide position the connection between the drive pressure source and the drive piston-drive cylinder unit releases and in at least one further slide position locks.
  • the invention is on a processing machine this type of drive cylinder with the holding device connected, the drive piston as a double-acting Pistons formed and via a piston rod with the workpiece guide connected, the annulus of the drive cylinder with the drive pressure source permanently connected and the cylinder space on the the side of the drive piston facing away from the annular space via the directional valve with the drive pressure source or an unpressurized room connectable.
  • the valve slide is in at least one slide position the connection between the drive pressure source and the cylinder space on the side of the Drive piston free; locks in a further slide position he makes this connection and gives the connection between the cylinder space on the side of the drive piston facing away from the annular space and free the unpressurized space.
  • valve spool In a slide position in which the valve spool is the connection between the drive pressure source and the cylinder space on the side of the Releases the drive piston, the associated holding device is located in their starting position on the workpiece. Now runs the Valve slide on the danger area around the machining head marking stop, the valve slide is in a Slider position in which he moved the connection between the drive pressure source and the cylinder space to the annulus opposite side of the drive piston locks and the connection releases this cylinder space with the unpressurized space.
  • the drive cylinder with the associated holding device by means of the permanent in the annulus of the drive cylinder applied drive pressure shifted relative to the drive piston.
  • the drive piston displaces this in the cylinder chamber on the side of the drive piston facing away from the annular space upcoming pressure medium in the unpressurized space and the holding device finally takes away from the machining head Position.
  • the valve slide moves to its starting position back.
  • the cylinder space is again on the Side of the drive piston facing away from the annular space with the drive pressure source connected. Accordingly, it builds in this cylinder space a pressure by means of which the drive cylinder in its starting position is moved back, in which the concerned Holding device is in its initial position on the workpiece.
  • the displacement drive described above can be used both as pneumatic as well as hydraulic drive system his.
  • the latter embodiment is found on one preferred design of the processing machine according to the invention, a hydraulic directional control valve is provided as the switching element is.
  • the hydraulic directional valve By means of the hydraulic directional valve, the Switch the hydraulic slide drive immediately.
  • valve spool by means of a spring element
  • a spring element offers a structurally simple and maintenance-friendly option to apply force to the valve spool.
  • the valve spool in the direction of the drive pressure source be pressurized to the stop.
  • the workpiece guide In addition to driving the holding devices relative to the workpiece and the workpiece guide also offers control of the fixation the holding devices on the workpiece or the release of the holding devices from the workpiece one way the speed to increase workpiece machining.
  • Processing machine is therefore provided that the holding devices controlled by means of the respectively assigned switching element can be fixed on the workpiece.
  • the one with an immediate mechanical Coupling the movement of the holding devices relative to the workpiece and the workpiece guide and the definition or Loosening the holding devices associated mechanical inertia avoided in this way.
  • the functions "moving the holding devices” and “fixing or releasing the holding devices” parallel in time or at least in close time Execute the sequence one after the other.
  • the holding devices each have at least two Have jaws between which the specified workpiece is held clamped and at least one by one Axis of rotation is rotatably mounted and being a switching element
  • Directional control valve with a valve spool is provided characterized in that the rotatably mounted jaws on the Side of the axis of rotation facing away from the workpiece projects beyond it and itself on a control curve rising in the opposite direction of the workpiece supports which with a guided in a control cylinder Control piston connected and parallel to the workpiece plane is displaceable and that the control cylinder via the directional valve can be connected to a control pressure source, the valve spool of the directional control valve in at least one control position a connection between the control cylinder and the control pressure source releases and in at least one other tax position this connection is blocked.
  • On such a processing machine can be one and the same switching element for controlling the assigned Holding device in the workpiece releasing or in that Workpiece-defining position and for actuating the drive for the movement of the holding device in question relative to the Workpiece and the workpiece guide can be used.
  • Control piston control cylinder units that can be acted on separately with a control pressure the possibility is opened that Holding devices decoupled from their relative movement to fix the workpiece and the workpiece guide on the workpiece or detach from it.
  • control piston is designed as a differential piston and that of the smaller piston area limited space of the control cylinder with the Control pressure source is permanently connected and that of the larger Piston area limited space of the control cylinder via the directional valve connectable to the control pressure source or an unpressurized room is, the valve spool in a control position Connection between the control pressure source and that of the larger one Releases piston area limited control cylinder space and in at least one other control position blocks this connection and releases the connection to the depressurized space.
  • Control pressure source provided the drive pressure source.
  • the rotatable jaws are supported by a support roller on the control curve, so that on the contact surface between the control cam and the associated jaws occurring friction is reduced, and there is a smooth mechanical swivel drive for the jaws.
  • valve spool by means of a lock-up control pressure acts on the connection between the control cylinder and the control pressure source releasing and / or in a connection blocking position is displaceable.
  • the bypass control pressure the holding devices can be used independently of a contact between the switching element and the opposite the processing head stationary stop in that position control in which they release the workpiece. In this position The holding devices can be used to prepare the machining process the workpiece to be machined in the holding devices be inserted.
  • valve slides are expedient all switching elements simultaneously with the bypass control pressure acted upon, so that the workpiece to be machined be inserted into all holding devices at the same time can.
  • the minimization of the Set-up times of the processing machine help to minimize them the total duration of workpiece machining.
  • Processing machine is used to control the holding devices regardless of contact between the valve spool and the stationary stop relative to the machining head provided that the valve spool two telescopically in the direction of displacement has part slides guided to each other, which are displaceable against each other against a restoring force, wherein the first slider that is stationary relative to the machining head Assigned stop and the second slider by means of Bypass control pressure is applied relative to the first Slider in the connection between the control cylinder and the control pressure source releasing and / or in this connection blocking position is displaceable.
  • fig. 1 and 2 includes the illustrated Processing machine a stand 1 with a machine upper part 2 and a machine base 3.
  • a workpiece guide 4 arranged, by means of which a workpiece in Form of a metal sheet 5 in a horizontal plane relative to a punching station 6 moved at the front end of the stand 1 can be.
  • the punching station 6 consists essentially of one on the machine upper part 2 stored machining head 7 with one on and from movable stamp 8 and from one on the machine base 3 supported die holder 9, in which a not shown Die is held.
  • the workpiece guide 4 includes a Carriage 10, which is driven by a motor 11 in Direction of a double arrow 12 is movable. To this end meshes a pinion mounted on the drive shaft of the motor 11 with a rack 13 attached to the machine base 3.
  • a cross rail 14 is transverse to the guide carriage 10 Movable in the direction of a double arrow 15 guided.
  • the cross rail 14 is driven by a motor 16, the one with a drive pinion 17 fixed to the cross rail 14 connected rack 18 applied.
  • a total of six guide housing 19 rigidly connected on the side facing the punching station 6 .
  • a holding device in the form of a claw 20 relative to the guide housing 19 in Direction of the double arrow 12 slidably guided.
  • Fig. 2 are only four of the total of six guide housings 19 or claws 20 shown.
  • a stop designed as a dead zone link 21 is firmly connected to the die holder 9 and defined a danger zone around the machining head 7.
  • the dead zone backdrop 21 is associated with one on each of the claws 20 this switching element 22 is each slidably attached.
  • the metal sheet 5 by moving the cross rail 14 Moved upwards in Fig. 2, the switching element runs 22 of the lower machining head 7 in FIG. 2 Claw 20 on the dead zone link 21. As a result this claw 20 opened and relative to the workpiece and the associated one Guide housing 19 linear in the direction of the cross rail 14 proceed.
  • the retired position remains Claw 20, as long as the switching element 22 is with the dead zone backdrop 21 is in contact.
  • the metal sheet 5 is during this time by means of the remaining claws 20 on the workpiece guide 4 set.
  • a hydraulic directional control valve with a Valve slide 23 is used, which with a corresponding arrangement the associated claw 20 opposite the machining head 7 is supported by a feeler roller 24 on the dead zone link 21.
  • the Valve slide 23 can five slide positions I, II, III, IV, V take in.
  • a drive piston 25 and a drive cylinder 26 existing drive piston / drive cylinder unit 27.
  • the drive piston 25 is a double-acting differential piston formed and via a piston rod 28 on the guide housing 19 set.
  • the drive cylinder 26 is connected to the claw 20.
  • the annular space of the drive cylinder 26 is through a central bore 29 to a hydraulic pump serving as a drive pressure source 30 is connected and is permanently powered by this standing hydraulic fluid.
  • the cylinder room of the drive cylinder 26 on the side facing away from the annular space Side of the drive piston 25 is via a hydraulic line 31 connected to a working connection of the directional valve 22.
  • a control cylinder 32 and a control piston 33 form a control piston-control cylinder unit 34.
  • the control piston 33 is designed as a double-acting differential piston. The one from the smaller piston area is limited by a control cylinder space Pressure line 35, partially as a central longitudinal bore inside a guide rod connected to the guide housing 19 36 runs, permanently with that also used as a control pressure source Hydraulic pump 30 connected.
  • a hydraulic line 37 connects that limited by the larger area of the control piston 33 Control cylinder room with the second working port of the directional valve 22.
  • the directional control valve 22 is finally on via a pump line 38 the hydraulic pump 30 is connected and via a tank line 39 with an unillustrated, unpressurized, in the sense of under ambient pressure standing hydraulic tank connected.
  • a tensioning piston is formed in one piece with the control piston 33 40, the wedge-shaped on its facing away from the control piston 33 End with a rising in the direction of the control piston 33
  • Control curve 41 is provided. Is based on the control curve 41 a clamping jaw 43 of the claw 20 from a support roller 42.
  • the jaws 43 is rotatably supported about an axis of rotation 44 and is on the side away from the support roller 42 by a Compression spring in the form of an expansion spring 45 is applied.
  • a rigid one Clamping jaws 46 of the claw 20 serve as supports for the metal sheet 5 and as an abutment for the spreading spring 45.
  • Figs. 3 and 4 is the starting position Claw 20 clamped to the metal sheet 5.
  • the valve spool 23 is in the slide position I, in which it the hydraulic pump 30 via the pump line 38 and the hydraulic lines 31, 37 with the space of the drive cylinder 26 on the the side of the drive piston 25 facing away from the annular space or with the space delimited by the larger area of the control piston 33 of the control cylinder 32 connects.
  • the tank line 39 is blocked.
  • On both sides of the drive piston 25 is in the drive cylinder 26 the same pressure, namely that of the hydraulic pump 30 generated drive pressure. Because of the different Size of the piston or However, the drive cylinder 26 is in its cylindrical surfaces the fig. 3 and 4 move right end position. Corresponding applies to the claw 20 connected to the drive cylinder 26.
  • control piston-control cylinder unit 34 Due to the corresponding pressure-area ratios on the control piston-control cylinder unit 34 takes the one with the control piston 33 one-piece tensioning piston 40 also in the Fig. 3 and 4 right end position. Acted in this position the tensioning piston 40 over the cam 41 the clamping jaws 43 in the closing direction,
  • valve spool 23 With at its front end arranged feeler roller 24 in the course of by means of the workpiece guide 4 accomplished movement of the metal sheet 5 on the dead area backdrop 21 on, it is first in the slide position II postponed.
  • slide position II In the slide position II is still the Space of the drive cylinder 26 facing away from the annular space Side of the drive piston 25 connected to the hydraulic pump 30. Is locked in slide position II via the pump line 38 producible connection of the hydraulic pump 30 with that of the larger area of the control piston 33 limited control cylinder space.
  • valve slide 23 continues to run onto the dead zone link 21 finally becomes the space of the drive cylinder 26 on the side of the drive piston 25 facing away from the annular space connected to the unpressurized tank line 39 via the valve slide 23.
  • the Drive piston 25 under the action of the pending in the annulus and the drive pressure generated by the hydraulic pump 30 Displace hydraulic fluid on the opposite side. Accordingly, the drive cylinder 26 moves together with the associated claw 20 in FIGS. 3 and 4 after Left.
  • the previously opened claw 20 is consequently by the metal sheet 5 is moved away and opposite the machining head 7 the punching station 6 withdrawn.
  • This withdrawal movement ends as soon as the valve slide 23 moved with the claw 20 of the Dead area backdrop 21 is so far away that it is out of power a symbolized spring 47 acted upon by the slide position V is moved back to the slide position IV.
  • the dead zone gate 21 is opposite the machining head 7 attached such that the claw 20 is always outside the danger zone is held around the machining head 7. Besides, is the dead area backdrop 21 is formed such that the contact with the valve slide 23 ends as soon as the claw 20 the processing head 7 happened with a certain safety distance. As soon as the claw 20 has reached this position, the valve slide 23 released and this then goes through first the slide positions III and II, in which the open claw 20 is moved back to the sheet 5 before he again the Slider position I occupies, in which the claw 20 closed and is set on the metal sheet 5.
  • a reciprocating piston-lifting cylinder unit 48 indicated in FIG. 3 serves for raising and lowering the dead zone setting 21.
  • Lowering the Dead area backdrop is to be made possible, for example, in cases in which the processing tools at the punching station 6 with the help the workpiece guide 4 can be changed and to this Purpose the workpiece guide 4 in the vicinity of the machining head 7 or the die holder 9 must be moved.
  • Fig. 3 is indicated by dashed lines, the dead zone backdrop 21 in the lowered Position.
  • valve spool 23 is made of two in Direction of movement telescopically guided slide elements 49, 50 composed.
  • the partial slide 49 is the dead zone backdrop 21 assigned and is moved to this when it comes up. This results in the switching operations described above.
  • the partial slide 50 guided inside the partial slide 49 is on a piston 51 via a pressure line 52 with a pneumatic bypass control pressure can be applied.
  • Control edges 53, 54 of the inner slider 50 are control edges on the outer Part slider 49 assigned.
  • FIG. 6a shows the mutual arrangement of the control edges 53, 54 on the inner slide part 50 opposite the assigned control edges on the outer slide part 49 in the starting position of the Switching element 22.
  • the switching element takes 22 switch position I according to FIG. 3, i.e. the assigned Claw 20 is in its away from the cross rail 14 End position shifted and controlled in the closed position.
  • the claw 20 are opened to insert one to be machined Allow workpiece, so the inner slide 50 on the piston 51 with pneumatic lock-up control pressure acted upon.
  • the inner slider shifts 50 relative to the outer slide valve 49, which looks like 5 can be seen supported on the housing of the control valve 22, until the control edges 53, 54 assume the position shown in Fig. 6b.
  • FIG. 6c 53, 54 of the inner slide part 50 in that operating state of the directional control valve 22 shown in which the inner slide valve 50 unloaded and the accumulated on the dead zone backdrop 21 outer slide valve 49 in its which to the control cylinder 32 leading hydraulic line 37 moved locking position is.

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Claims (13)

  1. Machine à travailler des pièces, en particulier machine à poinçonner, comprenant une tête de travail (7) ainsi qu'un positionneur de pièce (4) déplaçable par rapport à cette tête, sur lequel sont prévus au moins deux dispositifs de maintien (20) de la pièce (5), qui peuvent être fixés de façon commandée à la pièce (5) et sont déplaçables par des moyens d'entraínement, qui sont en liaison avec une source d'énergie, par rapport à la pièce (5) et au positionneur (4), les moyens d'entraínement des dispositifs de maintien (20) étant en liaison avec la source d'énergie à travers au moins un élément de manoeuvre (22) respectif déplaçable conjointement avec la pièce (5) à l'état couplé à lui, avec coordination à l'élément de manoeuvre (22) d'une butée (21) fixe par rapport à la tête de travail (7), le dispositif de maintien (20) concerné étant amené de façon commandée à une position libérant la pièce (5) lorsque l'élément de manoeuvre (22) est venu s'appliquer contre la butée (21), et déplacé, par rapport à la pièce (5), à une position présentant une distance de sécurité de la tête de travail (7), caractérisée en ce que l'élément de manoeuvre (22) est relié au dispositif de maintien (20) coordonné et présente un tiroir de manoeuvre qui, lorsqu'il occupe une position d'application contre la butée (21), s'appuie sur celle-ci en étant chargé par une force en direction de la butée (21), le tiroir de manoeuvre reliant dans au moins une position la source d'énergie aux moyens d'entraínement du dispositif de maintien (20) coordonné et interrompant cette liaison dans au moins une autre position.
  2. Machine à travailler des pièces selon la revendication 1, dans laquelle les dispositifs de maintien (20) sont chacun déplaçables en translation par un entraínement de translation, comportant au moins un vérin (27) à piston et cylindre de translation en tant que moyen d'entraínement, par rapport à la pièce (5) et au positionneur de pièce (4), caractérisée en ce que le vérin d'entraínement (27) est en liaison avec une source de pression d'entraínement (30) à travers l'élément de manoeuvre (22), élément qui est constitué par un distributeur (22) possédant un tiroir de distribution (23) comme tiroir de manoeuvre, lequel libère la liaison entre la source de pression d'entraínement (30) et le vérin d'entraínement (27) dans au moins une position de tiroir (I, II, III) et coupe cette liaison dans au moins une autre position de tiroir (IV, V).
  3. Machine à travailler des pièces selon la revendication 2, caractérisée en ce que le cylindre d'entraínement (26) du vérin est relié au dispositif de maintien (20) et son piston d'entraínement (25), réalisé comme un piston à double effet, est relié par l'intermédiaire d'une tige de piston (28) au positionneur de pièce (4), que la chambre annulaire du cylindre d'entraínement (26) est reliée en permanence à la source de pression d'entraínement (30) et sa chambre cylindrique, située du côté du piston d'entraínement (25) opposé à la chambre annulaire, peut être reliée à travers le distributeur (22) à la source de pression d'entraínement (30) ou à un espace sans pression, le tiroir de distribution (23) libérant, dans au moins une position de tiroir (I, II, III), la liaison entre la source de pression d'entraínement (30) et la chambre cylindrique et coupant cette liaison dans une autre position de tiroir (V) dans laquelle il libère la liaison entre la chambre cylindrique et l'espace sans pression.
  4. Machine à travailler des pièces selon la revendication 2 ou 3, comprenant un entraínement de translation de type hydraulique, caractérisée en ce que l'élément de manoeuvre (22) est un distributeur hydraulique (22).
  5. Machine à travailler des pièces selon une des revendications 2 à 4, caractérisée en ce que le tiroir de distribution (23) est chargé par une force en direction de la butée (21) par un élément élastique.
  6. Machine à travailler des pièces selon une des revendications 2 à 5, caractérisée en ce que le tiroir de distribution (23) est chargé par une force en direction de la butée (21) au moyen de la source de pression d'entraínement (30).
  7. Machine à travailler des pièces selon une des revendications 1 à 6, caractérisée en ce que les dispositifs de maintien (20) peuvent être fixés à la pièce (5) de façon commandée au moyen de l'élément de manoeuvre (22) coordonné.
  8. Machine à travailler des pièces selon la revendication 7, dans laquelle les dispositifs de maintien (20) présentent chacun au moins deux mâchoires de serrage (43, 46) entre lesquelles la pièce (5) fixée est maintenue par serrage et dont l'une au moins est montée basculante autour d'un axe de basculement (44), avec prévision, en tant qu'élément de manoeuvre (22), d'un distributeur (22) possédant un tiroir de distribution (23), caractérisée en ce que la mâchoire (43) montée basculante s'étend au-delà de l'axe de basculement (44) sur le côté éloigné de la pièce (5) et s'y appuie sur une rampe de commande (41) qui monte dans le sens de l'éloignement de la pièce (5), la rampe étant reliée à un piston de commande (33) guidé dans un cylindre de commande (32) et étant déplaçable en translation sur celui-ci, parallèlement au plan de la pièce, et que le cylindre de commande (32) peut être relié à travers le distributeur (22) à une source de pression de commande (30), le tiroir (23) du distributeur (22) libérant dans au moins une position de commande (I) une liaison entre le cylindre de commande (32) et la source de pression de commande (30) et coupant cette liaison dans au moins une autre position de commande (II, III, IV, V).
  9. Machine à travailler des pièces selon la revendication 8, caractérisée en ce que le piston de commande (33) est réalisé comme un piston différentiel et que la chambre du cylindre de commande (32) délimitée par la plus petite face du piston est reliée en permanence à la source de pression de commande (30) et la chambre du cylindre de commande (32) délimitée par la plus grande face du piston peut être reliée à travers le distributeur (22) à la source de pression de commande (30) ou à un espace sans pression, le tiroir de distribution (23) libérant dans une position de commande (I) la liaison entre la source de pression de commande (30) et la chambre du cylindre de commande délimitée par la plus grande face du piston, et coupant cette liaison, en libérant la liaison avec l'espace sans pression, dans au moins une autre position de commande (III, IV, V).
  10. Machine à travailler des pièces selon au moins les revendications 2 et 8, caractérisée en ce que la source de pression d'entraínement (30) est prévue comme source de pression de commande (30).
  11. Machine à travailler des pièces selon une des revendications 7 à 10, caractérisée en ce que la mâchoire (43) montée basculante s'appuie sur la rampe de commande (41) par l'intermédiaire d'un galet d'appui (42).
  12. Machine à travailler des pièces selon une des revendications 8 à 11, caractérisée en ce que le tiroir de distribution (23) est déplaçable en translation, par une pression de commande de pontage, à une position libérant la liaison entre le cylindre de commande (32) et la source de pression de commande (30) et/ou à une position coupant cette liaison.
  13. Machine à travailler des pièces selon la revendication 12, caractérisée en ce que le tiroir de distribution (23) comporte deux tiroirs partiels (49, 50) guidés télescopiquement l'un sur l'autre dans la direction de translation et déplaçables en translation l'un par rapport à l'autre à l'encontre d'une force de rappel, un premier tiroir partiel (49) étant coordonné à la butée (21), laquelle est fixe par rapport à la tête de travail (7), et le second tiroir partiel (50) étant déplaçable en translation, par rapport au premier tiroir partiel (49), par la pression de commande de pontage appliquée à lui, à la position libérant la liaison entre le cylindre de commande (32) et la source de pression de commande (30) et/ou à la position coupant cette liaison.
EP95113809A 1994-09-24 1995-09-02 Machine d'usinage à dispositifs de fixation de pièce à travailler mobiles Expired - Lifetime EP0703020B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9415514U 1994-09-24
DE9415514U DE9415514U1 (de) 1994-09-24 1994-09-24 Bearbeitungsmaschine mit bewegbaren Werkstückhaltevorrichtungen

Publications (3)

Publication Number Publication Date
EP0703020A2 EP0703020A2 (fr) 1996-03-27
EP0703020A3 EP0703020A3 (fr) 1996-06-05
EP0703020B1 true EP0703020B1 (fr) 2000-03-15

Family

ID=6914132

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95113809A Expired - Lifetime EP0703020B1 (fr) 1994-09-24 1995-09-02 Machine d'usinage à dispositifs de fixation de pièce à travailler mobiles

Country Status (4)

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US (1) US5701791A (fr)
EP (1) EP0703020B1 (fr)
JP (1) JP2637065B2 (fr)
DE (2) DE9415514U1 (fr)

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IT1285628B1 (it) * 1996-03-20 1998-06-18 Rainer Srl Macchina per la lavorazione di lamiere
IT1298389B1 (it) * 1997-12-24 2000-01-05 Giben Impianti Spa Macchina sezionatrice per il taglio di pannelli e relativo metodo di taglio.
DE10201368C1 (de) * 2002-01-16 2003-05-28 Fischer Maschf Karl E Schere zum Schneiden von Bandmaterial
US6826998B2 (en) 2002-07-02 2004-12-07 Lillbacka Jetair Oy Electro Hydraulic servo valve
US7114408B2 (en) * 2003-01-30 2006-10-03 Delaware Capital Formation, Inc. Drop away leaf pivot unit
ITMI20062240A1 (it) * 2006-11-23 2008-05-24 Salvagnini Italia Spa Manipolatore di fogli di lamiera
DE102010063541A1 (de) * 2010-12-20 2012-06-21 Trumpf Werkzeugmaschinen Gmbh + Co. Kg Werkstück-Halteeinrichtung zum Festlegen eines plattenartigen Werkstückes, insbesondere eines Blechs, an einer Werkstück-Bewegungseinheit einer Werkzeugmaschine
CN102989918A (zh) * 2012-04-23 2013-03-27 北京星和众工设备技术股份有限公司 一种步进式夹钳自动送料装置
CN103658299A (zh) * 2013-11-19 2014-03-26 嘉兴永发电子有限公司 通风板的冲压装置
KR102563440B1 (ko) * 2018-11-13 2023-08-03 현대자동차 주식회사 연료전지용 막-전극 어셈블리의 커팅 장치 및 방법
CN109571399A (zh) * 2019-01-08 2019-04-05 孙燕清 一种伸缩式电动卡钳
CN110802181A (zh) * 2019-11-02 2020-02-18 江苏永兴金融设备有限公司 一种用于折弯机的自动送料结构以及送料方法
CN114633109B (zh) * 2022-02-24 2024-07-26 海南荣天新能源科技有限公司 可自动转移闭合的圆筒充电桩钣金加工设备

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FR1582584A (fr) * 1968-08-02 1969-10-03
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JPS55131451A (en) * 1979-03-24 1980-10-13 Murata Mach Ltd Positioning and clamping plate material
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JPS60111729A (ja) * 1983-11-21 1985-06-18 Murata Mach Ltd ワ−クホルダ装置
US4589317A (en) * 1983-12-30 1986-05-20 U.S. Amada Limited Sheet or plate material machining equipment
DE4132099C1 (fr) * 1991-09-26 1992-08-27 C. Behrens Ag, 3220 Alfeld, De

Also Published As

Publication number Publication date
JPH08168836A (ja) 1996-07-02
DE9415514U1 (de) 1994-11-17
DE59507990D1 (de) 2000-04-20
US5701791A (en) 1997-12-30
EP0703020A3 (fr) 1996-06-05
JP2637065B2 (ja) 1997-08-06
EP0703020A2 (fr) 1996-03-27

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