EP1759780B1 - Dispositif de formage per étirage profond à plusieurs étages commandés indépendamment - Google Patents

Dispositif de formage per étirage profond à plusieurs étages commandés indépendamment Download PDF

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Publication number
EP1759780B1
EP1759780B1 EP06016380A EP06016380A EP1759780B1 EP 1759780 B1 EP1759780 B1 EP 1759780B1 EP 06016380 A EP06016380 A EP 06016380A EP 06016380 A EP06016380 A EP 06016380A EP 1759780 B1 EP1759780 B1 EP 1759780B1
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EP
European Patent Office
Prior art keywords
stage
forming machine
automatic forming
tool
travel
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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.)
Not-in-force
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EP06016380A
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German (de)
English (en)
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EP1759780A1 (fr
Inventor
Dieter Abel
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F Post GmbH
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F Post GmbH
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    • 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
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/20—Deep-drawing
    • B21D22/22—Deep-drawing with devices for holding the edge of the blanks
    • 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
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/20—Deep-drawing
    • 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
    • B21D24/00—Special deep-drawing arrangements in, or in connection with, presses
    • B21D24/005—Multi-stage presses

Definitions

  • the invention relates to a step-forming machine specified in the preamble of claim 1 Art.
  • Deep drawing presses known in the art, e.g. for deep drawing by single-acting pulling, double-acting pulling, everthing, and the like. Most include common to all stages press ram, which specifies the stroke, the acceleration, the speed profile and the force profile for all stages. Setting up the tools is time consuming and requires skilled personnel. Process stability is not very high, at least in some stages, because conventional die cushions or springs are used and the individual stages interact.
  • a known profiling with several arranged in line forming stations servomotors are provided in the forming stations for pairwise cooperating roll forming tools. Between the tools and the servomotors gears and shafts are arranged. The setting of the roll forming tools via spindle drives.
  • a central data processing device controls all adjustable roll forming tools. From temporal progressions of the position data during a trial phase and temporal progressions of shape data of a profile, process behavior patterns are developed in order to regulate optimal process parameters.
  • Out GB 1 491 143 A discloses a servo-controlled hydraulic pressing device for deep-drawing seamless cup members, which performs operations in four sections within a common press frame, with each of which a final product is produced.
  • actuators multi-stage hydraulic cylinders are used with control valves.
  • the control device is a logic circuit which controls the working steps in consideration of signals of limit switches or stroke measuring devices. Each thermoforming process is executed, but not regulated. For example, the hold-down formed by a hydraulic cylinder stage with constant contact pressure operated. Limit switch report to the controller, the execution of the relevant step, wherein at least no pressure measurement is performed.
  • wave generators are provided as clock for all sections of the pressing device. Only relatively simple end products are produced.
  • the invention has for its object to provide a step-forming machines of the type mentioned, the short Einrichtterrorism, easy readjustment, high process stability and a flexible modular machine structure allows, and in particular can use all the usual thermoforming methods.
  • each stage can be integrated as a module in the step-forming machine.
  • a die cushion or a drawing spring is replaced by the programmable hydraulic cylinder, which is not only precisely adjustable its initial force effect, but also allows a programmable force curve or path, which is not limited by any progressiveness, but for optimal forming, eg deep drawing , cares.
  • Every actuator is at least a hydraulic cylinder with at least one associated control valve, which is accessed by the electronic control device.
  • Hydraulic cylinders allow the development of optimal stroke, acceleration, speed and force profiles in a compact size, so that each stage operates under optimized conditions.
  • the generated pressure and the applied force are proportional to each other. This is particularly useful for deep drawing.
  • the control valve expediently a servo or proportional valve with magnetic actuation, allows the sensitive and optionally load-independent motion control of the respective tool.
  • Each hydraulic cylinder defines, as it were, a servohydraulic CNC axis in any arrangement, ie in the upper and / or the lower section of the respective stage.
  • Each hydraulic cylinder is either operated only with a travel control, or with a displacement and pressure control. In the latter case, during a work cycle, a changeover from displacement to force regulation and vice versa can take place.
  • the time of switching, for example, to a force control and then the force profile to be controlled are programmed in the CNC program by the installer. Thanks to the free programmability, the geometry of a part can even be pronounced, in which, for example, the drawing punch remains in the end position or even looks up. This allows the hydraulic cylinder in the actuator problems, because the individual stages do not affect each other at all.
  • the change-over from, for example, displacement to force control, and vice versa is programmed via a so-called multi-cam function and thereby visualized in the programming terminal. For example, the two working axes of a section with the one or two working axes of the other section of the stage are displayed and programmed together in the terminal.
  • the distance measuring device and / or the pressure measuring device to a control stage, in particular a PID controller, connected, wherein the control stage between a setpoint generator and the control valve is placed. It is e.g. a feedback control in a closed loop.
  • each hydraulic cylinder is associated with a distance measuring device and / or a pressure measuring device which is directly or indirectly connected to the electronic control device or are, so that the electronic control device is informed at any time about the actual conditions.
  • a distance measuring device is associated with the movement of the tool or a movable component of the hydraulic cylinder as the path measuring device.
  • the pressure measuring device may be an analog or digital transducer, which picks up the pressure, for example in the cylinder, and converts it into a signal for the electronic control device.
  • the electronic control device comprises a programming terminal with a monitor.
  • the monitor enables the visualization of the programming of each individual working axis.
  • the entire process can be visualized in a diagram in order to be able to carry out temporal reconciliation of the individual processing steps in the simplest way.
  • the steps are stacked on each other, e.g. on the programming terminal, tuned, and not on the built-in or removed tool.
  • the installation of a tried and tested tool is also carried out with a process coordination at the terminal.
  • each hydraulic cylinder defines a working or tool axis, with up to four working axes per step.
  • Each individual movement can be programmed, both the forward stroke and the return stroke, or the common strokes in the upper and lower sections during a work cycle.
  • the four axes can include, for example, the die, the drawing punch, the sheet metal or blank holder and an ejector. This allows all common thermoforming methods to be used, with each movement being programmed.
  • a maximum of two hydraulic cylinders should be provided. These hydraulic cylinders can be built into each other coaxially, or integrated into the actuator one behind the other. This saves space and allows you to process as many steps as possible in each step.
  • the steps in the frame in modular design individually interchangeable and / or implemented arranged. This allows the step forming machine to be conveniently configured to make other parts or use other tools.
  • a monoblock forming machine in which all stages are arranged in a single frame into which the raw material enters and from which the parts are conveyed away.
  • a multi-block automatic forming machine is used from a plurality of frame racks, each with selected stages, which are coupled together as a complete forming center. Intermediate machining may be performed between the individual blocks if necessary.
  • each stage is arranged in a frame frame section, which can be exchanged with other frame sections to a monoblock or Mutliblöcke combined.
  • This step module system is extremely flexible and reconfigurable.
  • a framework section could also be housed more than one stage.
  • the frame frame section is a C-shaped single column frame with an open mouth side and a stand.
  • the Einmenrgestell is optionally placed with its sides in a composite with other stage modules, the mouth sides can be conveniently clamped vertically with tie rods to minimize springing of the frame section in operation.
  • step modules offset by 180 ° relative to one another, so that the open mouth sides point to opposite sides.
  • the composite with each adjacent step module is force-transmitting purposefully provided only near the mouth sides, where pinning, clamping elements or fittings prove to be useful.
  • the upper and lower cheeks of Ein conspiracyrgestells are expedient only in the front area, ie near the end faces the cheeks connected to the neighboring frame to avoid mutual interference by the deflection of adjacent individual racks.
  • the step modules can be replaced individually or used in addition. Alternatively, all or most of the mouth sides could point to the same side. The springing of the mouths could then be prevented for example by tie rods or tensioning devices.
  • the respective monoblock or multiblock of step modules is advantageously completed at both ends of a set of single-stand racks by end-pieces which are used as e.g. single-stage double-stand sections are formed. This creates a longitudinal tunnel through which the transfer system can be installed.
  • the principle of the step modules enables an extremely flexible reconfigurability of the step press.
  • Such double column sections (with one or more stages) could also be used internally in the step module system, if e.g. the unilaterally open C-construction is not appropriate at this point.
  • the step forming machine can be combined with automatic follow-up processing devices for mounting, welding, threading, joining or the like.
  • step-forming machine S for example, a thermoforming forming machine in monobloc configuration M, has a closed frame 1, for example made of steel, which is open at both ends for material supply and part removal, and at the front and, if necessary. Rear free access offers.
  • a plurality of stages 2a, 2b, 2c, etc. are accommodated in succession and processing, each stage comprising an upper section 4 and a lower section 5.
  • a transfer system T expediently provided with unspecified servohydraulic or servo-electric drives, which can be equipped, for example, with grippers 3 for one-sided operation.
  • each stage 2a, 2b, 2c at least one servohydraulic actuator A is included, possibly even in each section 4, 5.
  • an electronic control device C expediently a CNC control device for free programming of at least the stages 2a, 2b, 2c, and optionally also of the transfer system T, which comprises at least one programming terminal 7 with a monitor 6.
  • an electro-hydraulic supply unit 8 for example, a motor-pump unit for providing sufficient hydraulic pressure and sufficient flow rate for the actuators A stages is provided, which is optionally associated with the electronic control device C and / or the programming terminal 7.
  • each section 4, 5 may have at least one servo-hydraulic actuator A, or only the lower or upper section 4, 5. All stages are completely independent of each other freely programmable and can with different strokes or strokes and / or forces or force profiles and / or speeds or speed profiles work.
  • electromagnetic drives e.g., with associated servo drives
  • actuators A could be used as actuators A.
  • Fig. 3 schematically illustrates a multi-block configuration MU of the step-forming machine S.
  • Several frame racks 1, each with selected stages 2a, 2b, and the like., Are consecutively set in the production direction and interconnected via intermediate transfer devices 9.
  • the multiblock configuration allows a reconfigurable arrangement and is therefore particularly flexible to adapt to changing requirements.
  • Fig. 4 illustrates a step-by-step system operating in either the monobloc M configuration of Fig. 1 or in the multiblock configuration MU of Fig. 3 can be applied.
  • Each step 2a, 2b is integrated in a step module, which is designed as a C-shaped Einissuengestell 11 and open at a mouth side.
  • Adjacent Einstellgestelle 11 are installed, for example, offset from each other by 180 °, such that the mouth sides have to different sides.
  • the upper and lower cheeks of each Einmenrgestells 11, suitably close to the respective cheek end and as indicated at 13, positively connected to the adjacent Einmenrgestell 11, eg pinned, cocked or screwed, so that the Eininerrgestell 11 does not auffedert in operation.
  • Fig. 5 illustrates a stage, for example, the stage 2b, which in the upper section 4 and in the lower section 5 each have a working axis X and Y respectively.
  • a die 14 driven by a hydraulic cylinder 27, and a central ejector punch 15, driven by a hydraulic cylinder 26 are provided, wherein the hydraulic cylinders 26, 27 coaxially with each other or one behind the other are set and the servohydraulic actuator A. define.
  • two tools are also provided, namely a plate or hold-down 16, driven by a hydraulic cylinder, and a drawing punch 17, also driven by a hydraulic cylinder, the two hydraulic cylinders are coaxially in the servohydraulic actuator A summarized.
  • Each hydraulic cylinder is associated with at least one control valve, suitably a servo or proportional control valve.
  • the control valve is actuated by the electronic control device C in dependence on the programming and the control deviation, wherein the hydraulic pressure comes from the hydraulic system 8.
  • Fig. 6 illustrates a section of a block diagram of the control device for the section 4 of the stage 2b.
  • the lower, not shown here section can be designed the same circuit design.
  • control panels 18, 19 and 20 are provided for a Wegachsenprofil, a multi-cam and a profile of the pressure control, which are associated with the hydraulic cylinder 26, the Wegachsenprofil and the analog axis profile of the pressure control 20 each a controller 21 for the way and 22nd are preceded by the pressure as a reference variable.
  • the two regulators are alternatively effective via a switchable in the control panel 19 for the multi-cam switch 23 and to a proportional control valve V of the hydraulic cylinder 26th connected.
  • the actual pressure is detected and converted in a converter 24 into a signal for the pressure regulator 22.
  • the hydraulic cylinder 26 is associated with a distance measuring device 25, for example, an absolute displacement sensor, which provides the controller 21 for the way a signal corresponding to the position or the path.
  • the hydraulic cylinder 26 serves to control the tool 14, for example the die 14 in FIG Fig. 5 while the other hydraulic cylinder 27 for controlling the tool 15, for example, the ejector punch 15 in Fig. 5 , serves.
  • hydraulic cylinder 26 the same arrangement of control panels and the like. As in the hydraulic cylinder 27 is provided.
  • the time can set at which is converted from a path control to a pressure control (path profile to pressure profile) during a work cycle, or vice versa.
  • a path control path profile to pressure profile
  • Each hydraulic cylinder can either only work with a travel control, or with travel and pressure control. If an actuator is equipped for the combination of the controls, a changeover can take place within one cycle.
  • the timing of the changeover and the force profile to be controlled are freely programmed by the fitter or machine operator.
  • the total stroke can be programmed, but even the starting point and end point of the stroke within one cycle.
  • certain positions within the stroke may be programmed, possibly taking into account or changing other criteria, such as pressure or speed.
  • the travel programming optionally combined with the pressure, can be used to vary the speed within the work cycle (velocity profile) or rapid acceleration to a certain point followed by slow speed under increased or decreased force, and the like.
  • the movement sequence with regard to the path and the pressure can be adapted individually to the respective requirements during forming.
  • a tool can remain stopped in a certain position with a defined force, or even look up. As a result, draw levels can be saved, which only serve the purpose of calibration in conventional deep drawing.
  • the counterforce of the hold-down, for example in the lower section can be variably set with increasing deformation unlike conventional die cushion or springs. Particularly useful, the force curve in, for example, the lower section during the work cycle gradually decreasing or increasing programmed or even vibrating.
  • the stroke in the lower section can also be adjusted individually. Since each CNC axis is freely programmable, the respective draw ratio can be increased in order to save a total of stages.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Presses (AREA)
  • Press Drives And Press Lines (AREA)
  • Mounting, Exchange, And Manufacturing Of Dies (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)

Claims (11)

  1. Automate de formage à plusieurs étages (S), comprenant une pluralité d'étages (2a, 2b, 2c), exécutant différentes étapes d'usinage, montés dans un bâti à cadre (1), chaque étage présentant une section inférieure et une section supérieure (4, 5) et, en au moins une section de chaque étage, est prévu au moins un actionneur (A), soutenu dans le bâti à cadre, manoeuvrant un outil (14 à 17) dans un axe de travail (X, Y) et, à tous les actionneurs, étant associé un Automate de commande CNC (C) programmable, électronique, caractérisé en ce que chaque actionneur (A) présente au moins un vérin hydraulique (26, 27), muni d'au moins une soupape de commande (V) associée, reliée au Automate de commande (C), en ce que la course d'outil et/ou la force d'outil et/ou la vitesse d'outil est (sont) générée(s) au moyen de la quantité, amenée au vérin hydraulique (26, 27) par la soupape de commande (V), du fluide hydraulique placé sous pression, en ce que, pour chaque étage (2a, 2b, 2c), la course d'outil et/ou la force d'outil et/ou la vitesse d'outil est (sont) programmable(s) librement, et en ce que, dans l'étape d'usinage, par l'intermédiaire d'une commutation à moment de commutation programmé, il est possible de commuter entre une régulation de la course d'outil, ou de la vitesse d'outil, et une régulation de la force d'outil.
  2. Automate de formage à plusieurs étages selon la revendication 1, caractérisé en ce que, à chaque vérin hydraulique (26, 27), sont associés un Automate de mesure de course (25) et un Automate de mesure de pression (24) pour la force exercée, proportionnelle à la pression, Automates raccordés, directement ou indirectement, au Automate de commande (C), en ce qu'un régulateur de course de déplacement (21), de préférence un régulateur PID disposé entre un capteur de valeur de consigne de course (18) et la soupape de commande (V), est prévu pour raccordement du Automate de mesure de course (25), en ce qu'un régulateur de force (22), de préférence un régulateur PID disposé entre un capteur de valeur de consigne de pression (20) et la soupape de commande (V), est prévu pour raccordement du Automate de mesure de pression (24), et en ce qu'une commutation est possible entre les deux régulateurs (21, 22) travaillant de façon alternée, par l'intermédiaire d'un commutateur (23) actionné lors de la commutation.
  3. Automate de formage à plusieurs étages selon la revendication 2, caractérisé en ce que le Automate de mesure de course (25) présente un capteur de course absolue, fournissant un signal de sortie pour le régulateur de course (21), et le Automate de mesure de pression (24) présente un enregistreur de pression, fournissant un signal de sortie pour le régulateur de pression (22), et un convertisseur de pression.
  4. Automate de formage à plusieurs étages selon la revendication 1, caractérisé en ce que chaque vérin hydraulique (26, 27) définit un axe de travail (X), et en ce que, par étage (2a, 2b, 2c), jusqu'à quatre axes de travail (X, Y), de préférence au maximum de deux vérins hydrauliques (26, 27), sont prévus.
  5. Automate de formage à plusieurs étages selon la revendication 1, caractérisé en ce que les vérins hydrauliques (26, 27) de la section (4, 5) sont placés soit coaxialement les uns dans les autres, soit en direction axiale les uns derrière les autres.
  6. Automate de formage à plusieurs étages selon la revendication 1, caractérisé en ce que les étages (2a, 2b, 2c), dans le bâti à cadre (1) d'un système modulaire à étages, sont disposés de manière à pouvoir être permutés ou convertis individuellement, dans un mode de construction modulaire.
  7. Automate de formage à plusieurs étages selon la revendication 1, caractérisé en ce que, dans un automate de formage monobloc (M), l'ensemble des étages (2a, 2b, 2c) sont disposés dans un unique bâti à cadre (1).
  8. Automate de formage à plusieurs étages selon la revendication 1, caractérisé en ce que, dans un automate de formage multibloc (MU), plusieurs bâtis à cadre (1) contiennent chacun des étages (2a, 2b, 2c) sélectionnés et sont couplés ensemble, en tant que centres de formage individuels.
  9. Automate de formage à plusieurs étages selon la revendication 1, caractérisé en ce qu'un étage (2a, 2b, 2c) est disposé dans un module d'étage (11), susceptible d'être combiné, de façon remplaçable, à d'autres modules d'étage (11), pour former un automate de formage monobloc, ou un automate de formage multibloc, et en ce que le module d'étage (11) est un bâti à col de cygne en forme de C, avec un côté gueule ouvert, susceptible de former, avec ses côtés, un élément composite avec d'autres modules d'étage.
  10. Automate de formage à plusieurs étages selon la revendication 9, caractérisé en ce que des modules d'étage (11) à bâti à col de cygne chaque fois voisins sont décalés à 180° les uns par rapport aux autres et, dans les zones d'extrémité limitrophes aux côtés gueules, sont soutenus les uns les autres avec transmission des efforts, de préférence sont goujonnés, bridés par serrage et/ou vissés les uns aux autres.
  11. Automate de formage à plusieurs étages selon la revendication 10, caractérisé en ce que, au moins aux deux extrémités d'un groupe des pièces de terminaison de bâtis à col de cygne (10) ayant la forme de modules à arcades, sont montées.
EP06016380A 2005-09-02 2006-08-04 Dispositif de formage per étirage profond à plusieurs étages commandés indépendamment Not-in-force EP1759780B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE202005013912U DE202005013912U1 (de) 2005-09-02 2005-09-02 Stufen-Umformautomat

Publications (2)

Publication Number Publication Date
EP1759780A1 EP1759780A1 (fr) 2007-03-07
EP1759780B1 true EP1759780B1 (fr) 2008-11-26

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EP (1) EP1759780B1 (fr)
AT (1) ATE415216T1 (fr)
DE (2) DE202005013912U1 (fr)

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DE102006019207B4 (de) * 2006-04-21 2008-07-24 Müller Weingarten AG Antriebssystem einer Mehrstößel-Umformpresse
WO2008134990A1 (fr) * 2007-05-02 2008-11-13 Müller Weingarten AG Système d'entraînement d'une presse de formage à poinçons multiples
WO2015010724A1 (fr) 2013-07-23 2015-01-29 Modus One Gmbh Module de force et système de pressage modulaire
DE202015101822U1 (de) 2015-04-14 2015-04-24 Dacos Notdienstanlagen Gmbh Warenausgabeautomat für Artikel aller Art, insbesondere Apothekenartikel
DE102016225986A1 (de) * 2016-12-22 2018-06-28 Bayerische Motoren Werke Aktiengesellschaft Vorrichtung und Verfahren zum Formen eines Bleches
US20210162483A1 (en) * 2018-02-14 2021-06-03 Langenstein & Schemann Gmbh Production system, production module, method for operating and setting up a production line, and method for producing a workpiece
US10786842B2 (en) 2018-09-12 2020-09-29 Fca Us Llc Draw-in control for sheet drawing
DE102019127116A1 (de) * 2019-10-09 2021-04-15 Elringklinger Ag Werkzeugmaschine mit mehreren Bearbeitungsstationen
CN111482510B (zh) * 2020-05-21 2024-05-10 厦门翼竑工贸有限公司 无骨雨刷弹片成型机
LU102201B1 (de) * 2020-10-22 2022-04-25 Clusteron Gmbh Vorrichtung und Verfahren zum Bearbeiten einer Materialbahn, Folgeverbundwerkzeug, Einzelmodul, Anordnung von mehreren solchen Einzelmodulen, Individualwerkzeug sowie Anlage zum Bearbeiten einer Materialbahn
CN112719478B (zh) * 2020-12-24 2022-04-01 清华大学 减小行星滚柱丝杠螺纹磨削波动的pid参数计算方法
IT202200008012A1 (it) * 2022-04-22 2023-10-22 L M C Mecc S R L Pressa per la piegatura di lamiere.

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US3908429A (en) * 1974-01-21 1975-09-30 Mts System Corp Hydraulic servo valve controlled cupping press
JP2001054766A (ja) * 1999-08-18 2001-02-27 Nidec Copal Corp 多段式洗浄槽
EP1245302B1 (fr) * 2001-03-27 2004-11-24 Dreistern-Werk Maschinenbau GmbH & co. KG Machine de profilage avec plusieurs stations de formage arrangées en ligne
JP2002316298A (ja) * 2001-04-18 2002-10-29 Komatsu Ltd トランスファプレスおよびそのスライド駆動方法

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DE202005013912U1 (de) 2005-12-08
DE502006002171D1 (de) 2009-01-08
ATE415216T1 (de) 2008-12-15
EP1759780A1 (fr) 2007-03-07

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