EP2483065A1 - Procédé pour déplacer une unité de façonnage d'une machine - Google Patents

Procédé pour déplacer une unité de façonnage d'une machine

Info

Publication number
EP2483065A1
EP2483065A1 EP10771643A EP10771643A EP2483065A1 EP 2483065 A1 EP2483065 A1 EP 2483065A1 EP 10771643 A EP10771643 A EP 10771643A EP 10771643 A EP10771643 A EP 10771643A EP 2483065 A1 EP2483065 A1 EP 2483065A1
Authority
EP
European Patent Office
Prior art keywords
processing unit
phase
processing
unit
during
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.)
Withdrawn
Application number
EP10771643A
Other languages
German (de)
English (en)
Inventor
Bernard De Muynck
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.)
Haco NV
Original Assignee
Haco NV
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 Haco NV filed Critical Haco NV
Publication of EP2483065A1 publication Critical patent/EP2483065A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B1/00—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen
    • B30B1/26—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by cams, eccentrics, or cranks
    • B30B1/265—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by cams, eccentrics, or cranks using a fluid connecting unit between drive shaft and press ram
    • 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
    • B21D28/002—Drive of the tools

Definitions

  • the invention relates to a method for moving a processing unit of a machine, in particular press, wherein the moving comprises at least one approach phase and an adjoining processing phase, wherein the processing unit is approached or brought into contact with a workpiece to be machined during the approach phase, and wherein the processing unit applies force to the workpiece during the processing phase by moving the processing unit while in constant contact with the workpiece.
  • the invention relates to a device for moving a processing unit of a machine and a correspondingly configured machine.
  • Methods of the above type are commonly used in machines such as presses or the like. They are used to process a workpiece.
  • a processing unit for example, a ram is provided, which is initially approximated or brought into contact with the workpiece to be machined during an approach phase. This is followed by a processing phase during which the processing unit or ram exerts force on the workpiece in order to machine it in a desired manner.
  • the processing unit is in constant contact with the workpiece in order to realize the power transmission necessary for machining the workpiece.
  • a hydraulic press is conventionally equipped with at least one hydraulic drive unit having a hydraulic cylinder and a hydraulic unit driving it.
  • the hydraulic unit usually has an electric motor and a plurality of controllable valves.
  • the output side connected to the hydraulic cylinder processing unit is moved both during the approach phase, as well as during the processing phase exclusively by means of the hydraulic drive unit.
  • Hydraulic presses can be operated manually or controlled by a computer.
  • An advantage of hydraulic presses is that an exact control of the movement of the hydraulic cylinder and thus the processing unit moved therewith can take place in any phase of movement. Furthermore, even large forces can be generated and transmitted at any hydraulic cylinder position. Hydraulic presses are therefore very flexible and adaptable to the particular application.
  • it is disadvantageous that the processing unit can only be moved relatively slowly by means of the hydraulic cylinder or that there is a need for a costly high-performance hydraulic unit or other special devices in order to obtain sufficient movement speeds for the processing unit.
  • a mechanical press has a mechanical drive system, on the output side, the processing unit is arranged and which is driven by a flywheel. This is in turn driven by an electric motor.
  • mechanical presses in contrast to hydraulic presses, relatively high speeds of movement can be achieved for the processing unit.
  • Another advantage is the high rigidity of mechanical presses, so that even when large machining forces occur, it is ensured that ideal machining of a workpiece can take place.
  • a disadvantage is that the flywheel and thus also the mechanical drive system driving electric motor must be constantly turned on, which associated with high energy consumption.
  • the movement of the processing unit is determined by the particular design of the mechanical drive system and not adaptable to other purposes, whereby a mechanical press is not flexible.
  • Another disadvantage is that a large force can be applied only in the last few millimeters of the stroke of the processing unit.
  • the mechanical drive systems of mechanical presses are also usually relatively complicated and expensive.
  • Servo-mechanical presses also have a mechanical drive system, as known from mechanical presses. However, this is not driven by a flywheel but via a servo drive.
  • the servodrive is, for example, given as an "electric flywheel", in particular in the form of a large battery of capacities.Thus, with servo-mechanical presses, high speeds of movement can also be realized for the processing unit.With the use of the servo drive, the movement sequence of the processing unit can be precisely controlled, programmed Servo-mechanical presses also have a relatively lower energy consumption because energy can only be obtained from a power supply network when necessary and excess energy can be stored, which also has the disadvantage that power is only available in the last few years a few millimeters of the stroke of the processing unit can be applied.
  • This object is achieved by the method of the aforementioned type in that the movement of the processing unit during the approach phase by means of a servo-mechanical drive unit and during the processing phase by means of a hydraulic drive unit.
  • a servo-mechanical drive unit is thus combined with a hydraulic drive unit such that the advantages of these drive types are maintained.
  • the servo-mechanical drive unit is used during the approach phase and the hydraulic drive unit during the processing phase.
  • Both drive types allow a very exact and at the same time application-specific control of a machine operated according to the method according to the invention.
  • Such a machine can be used very variable.
  • Another advantage is that a large force can be applied not only in the last few millimeters of movement of the processing unit, as it is known from the conventional mechanical and servo-mechanical presses. Just this weakness of known presses is circumvented by the fact that the power transmission is effected by means of the hydraulic drive unit. This allows, in addition to a very individual power transmission, a very exact and application-specific control of the movements of the processing unit.
  • the processing unit Preferably, most of the total movement of the processing unit is covered by the servo-mechanical drive unit during the approach phase.
  • the amount of movement attributable to the processing phase of the entire movement is relatively small. Consequently, both the hydraulic cylinder and the cooperating hydraulic unit can be made relatively small, which has a favorable effect on the energy consumption of a machine operated according to the method according to the invention.
  • this relatively fast movements of the processing unit can be realized, which is anyway possible with the servo-mechanical drive unit, as described above. Consequently, the processing unit can be moved relatively quickly over its entire stroke.
  • the desired movement sequence of the machining unit and the resulting force transmission to a workpiece to be machined is very precisely controlled and optimally adapted to the particular application, as is apparent from a comparison of the above descriptions of hydraulic and servo-mechanical presses.
  • One according to the invention Consequently, the machine operated according to the method has a very high flexibility of use.
  • the servo-mechanical drive unit can be designed in a conventional manner. However, as a result of the method according to the invention, a less complex servo-mechanical drive unit can also be used by using a simple and cost-effective designed mechanical part and / or servo drive.
  • Another advantage is that no flywheel and no clutch / brake system as mechanical presses are required. Furthermore, the energy requirement of a machine operated according to the method according to the invention is relatively low, in particular since energy can be fed back into the utility grid. Also, for example, pendulum-like movements of the processing unit are possible.
  • presses can be operated according to the inventive method.
  • any type of machine is operable by the method according to the invention, in which an approach phase and an adjoining processing phase are given.
  • Examples of such machines are stamping presses, deep drawing presses, blanking presses, forging presses, stamping presses, transfer presses, punch presses, press brakes, shears and the like.
  • the processing unit is preferably moved cyclically, with a retraction phase following the processing phase during which the processing unit is moved, for example, counter to its direction of movement during the approach phase and the processing phase.
  • a movement cycle ends with the completion of the withdrawal phase. Subsequently, another cycle of movement can take place.
  • the movement cycles of the processing unit can be controlled exactly and individually in order to be able to optimally adapt the method to the respective intended use of a machine operated thereafter.
  • the processing unit is moved linearly during the approach phase over an approach path and during the processing phase over a processing path, the lengths and endpoints of these routes are individually adjustable and adaptable to each other.
  • This embodiment of the invention serves to provide a great versatility of a machine operated according to the method.
  • a linear movement takes place, for example, in forging presses.
  • the transition between the approach route and the processing route is free and selectable in accordance with the particular circumstances in order to be able to optimally adapt the method or a machine operated thereafter to the respective intended use.
  • the invention further proposes a device of the aforementioned type which has a servo-mechanical drive unit and a hydraulic drive unit arranged on the output side thereof, on the output side of which the processing unit is arranged.
  • the method according to one of the above-described embodiments or their arbitrary combination is preferably feasible.
  • a movement of the processing unit takes place by means of the servo-mechanical drive unit during the approach phase, followed by the processing phase in which the processing unit is moved by means of the hydraulic drive unit.
  • the device is set up such that the processing unit is initially approximated or brought into contact with a workpiece to be machined by the servo-mechanical drive unit up to a predeterminable distance, and that the processing unit subsequently by means of the hydraulic drive unit for machining the workpiece is moved, wherein the processing unit while it is in contact with the workpiece is force exerted on this.
  • a further advantageous embodiment of the invention provides that the servo-mechanical drive unit comprises at least one connecting rod driven by an eccentric, on the output side of which the hydraulic drive unit is arranged.
  • the eccentric may be formed as a separate component or be part of an eccentric shaft, which is driven by the servo drive.
  • the invention further proposes a machine, in particular a press, of the aforementioned type, in which the processing unit is moved according to the method according to one of the previously described embodiments or any combination thereof.
  • a machine, in particular press, of the aforementioned type which is characterized by a device according to one of the above-described embodiments or any combination thereof.
  • this machine is moved according to the method of any of the above-described embodiments or any combination thereof.
  • Figure 1 a schematic representation of a
  • FIG. 2 shows an exemplary sinusoidal movement path of a processing unit moved by means of the method according to the invention
  • FIGS. 3 to 7 alternative exemplary movement paths of the processing unit.
  • the device 1 shows schematically an embodiment of the device 1 according to the invention or a section of an embodiment of the machine according to the invention, which is provided with a corresponding Vorrich- 1 is equipped.
  • the device 1 has a servo-mechanical drive unit, with which the processing unit 2, which is designed as a ram plate, during the approach phase can be brought to an unillustrated, to be machined workpiece or brought into contact with this.
  • the servo-mechanical drive unit comprises a connecting rod 3, which is driven via an eccentric shaft 4 by a servo drive, not shown.
  • the speed and the respective position of the servo drive can be detected, for example via a sensor device on the transmission of the servo drive.
  • the movement of the servo-mechanical drive unit and thus of the processing unit 2 can be controlled exactly and application-specifically by means of a control device, not shown.
  • the length of the connecting rod 3 can be varied via an adjusting mechanism.
  • the eccentric shaft 4 is shown in an upper and a lower position, wherein the upper position of the maximum lower approach position and the lower position of the shaft 4 corresponds to the upper dead center of the movement of the processing unit 2.
  • the arrow 5 indicates the maximum stroke of the processing unit 2 during the approach phase.
  • the maximum lower approach position corresponds to that position of the processing unit 2, in which the processing unit 2 has been approached or brought into contact with a workpiece to be machined during the approach phase to a predeterminable suitable distance. In this position, the servo-mechanical drive unit should have taken a blocking position, from which the drive unit can not be crowded when force is applied to a workpiece to be machined by means of the processing unit 2 in the subsequent processing phase.
  • the processing phase preferably begins directly or after a time delay.
  • a piston 6 is articulated on the connecting rod 3, which is slidably guided in a guide 7 and thus can perform a linear movement.
  • the hydraulic drive unit is arranged on the output side of the piston 6, in turn.
  • This has a hydraulic cylinder 8, in which the lower portion of the piston 6 is slidably guided.
  • the lower part of the piston 6 is sealed by a seal 9 with respect to the hydraulic cylinder 8.
  • the hydraulic cylinder 8 is arranged movable in the direction of the arrow 10 relative to the guide 7.
  • a holding plate 11 is arranged on the output side, on which in turn the output side designed as a ram plate processing unit 2 is attached.
  • the arrow 10 indicates the maximum stroke of the processing unit 2 during the processing phase, which can be achieved by activating the hydraulic drive unit.
  • the respective position of the ram is detected by a position sensor 12 and passed on to the control device, not shown.
  • the ram is movably guided in a frame 13, which has sufficient rigidity.
  • FIG. 2 shows a sinusoidal movement path of the processing unit of a machine.
  • the approach phase takes place from the top dead center OT, that is to say the beginning of the approach phase, to a prescribable maximum approach point AP, which corresponds to a position machining unit in which the machining unit approaches or is in contact with a workpiece to be machined up to a predefinable distance stands.
  • the maximum approach point AP which corresponds to the end of the approach phase carried out with the servo-mechanical drive unit, the machining phase during which the machining unit 2 is moved by the hydraulic drive unit to a bottom dead center UT begins a desired machining of the workpiece to be machined bring about.
  • the retraction phase begins, during which both the servo-mechanical drive unit and the hydraulic drive unit initiate a return movement of the processing unit. cause unity to the upper dead center OT.
  • the movement sequence of the processing unit shown in FIG. 1 corresponds to a movement cycle.
  • FIG. 3 shows a movement path of the processing unit that is alternative to FIG. 2, wherein three movement cycles are shown.
  • a relatively rapid approach of the processing unit to a workpiece to be machined initially takes place from the top dead center OT to the maximum approach point AP by means of the servo-mechanical drive unit.
  • a slower movement of the processing unit by means of the hydraulic drive unit during the processing phase from the maximum approach point AP to the bottom dead center UT.
  • the withdrawal phase takes place.
  • FIG. 4 shows a further alternative movement path of the processing unit, wherein two movement cycles are shown.
  • a time delay of the movement up to the point X which can be specified in accordance with the application, until the beginning of the processing phase.
  • the machining phase takes place by means of the hydraulic drive unit, during which the machining unit is moved to the lower dead center UT in order to machine the workpiece in a desired manner.
  • the retraction phase begins during which the processing unit is first moved to the point Y quickly by means of the hydraulic drive unit and then slightly slower by means of the servo-mechanical drive unit to the top dead center OT.
  • FIG. 5 shows a further alternative movement path of the processing unit, wherein three complete movement cycles are shown. Such movement cycles can be used, for example, in a deep-drawing press.
  • FIG. 5 shows a further alternative movement path of the processing unit, wherein three complete movement cycles are shown.
  • Such movement cycles can be used, for example, in a deep-drawing press.
  • FIG. 6 shows a further alternative movement path of the processing unit, wherein three movement cycles are shown.
  • This type of movement is preferably used in a deep-drawing press.
  • FIG. 7 shows a further alternative movement path of the processing unit, wherein a complete cycle of movement is shown.
  • a movement cycle is used, for example, in a stamping press.
  • a processing phase during which the processing unit by means of the hydraulic drive unit executes a pendulum motion.
  • pendulum motion In order to maintain the clarity of Figure 7, is dispensed with a more detailed identification of the movement sequence shown.
  • All points shown in FIGS. 2 to 7 between different movement phases can be specified in an application-specific manner according to the method according to the invention, so that a machine operated according to this method can operate very energy-efficiently and can be used very flexibly.
  • fast movement sequences of the processing unit can be realized.
  • the speeds of the processing device can be varied in many ways and adapted to the particular application.
  • the method according to the invention and the device for carrying out the method can be used for rolling, deep drawing, cutting, forging, punching and the like. Accordingly, the invention also relates to stamping presses, deep drawing presses, cutting presses, forging presses, Die presses, step presses, hole punches, press brakes, hydraulic shears and the like, as well as other devices that are operated by the method according to the invention.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Presses (AREA)
  • Press Drives And Press Lines (AREA)

Abstract

L'invention concerne un procédé pour déplacer une unité de façonnage (2) d'une machine, notamment d'une presse, le déplacement comprenant au moins une phase d'approche suivie d'une phase de façonnage, l'unité de façonnage (2) s'approchant d'une pièce à façonner ou étant mise en contact avec cette dernière pendant la phase d'approche, l'unité de façonnage (2) exerçant, sous l'effet de son déplacement, une force sur la pièce pendant la phase de façonnage, tout en restant en contact permanent avec cette dernière. Le déplacement de l'unité de façonnage (2) s'effectue pendant la phase d'approche au moyen d'une unité d'entraînement servomécanique et pendant la phase de façonnage au moyen d'une unité d'entraînement hydraulique.
EP10771643A 2009-10-01 2010-10-01 Procédé pour déplacer une unité de façonnage d'une machine Withdrawn EP2483065A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200910043729 DE102009043729A1 (de) 2009-10-01 2009-10-01 Verfahren zum Bewegen einer Bearbeitungseinheit einer Maschine
PCT/EP2010/005989 WO2011038921A1 (fr) 2009-10-01 2010-10-01 Procédé pour déplacer une unité de façonnage d'une machine

Publications (1)

Publication Number Publication Date
EP2483065A1 true EP2483065A1 (fr) 2012-08-08

Family

ID=43598389

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10771643A Withdrawn EP2483065A1 (fr) 2009-10-01 2010-10-01 Procédé pour déplacer une unité de façonnage d'une machine

Country Status (3)

Country Link
EP (1) EP2483065A1 (fr)
DE (1) DE102009043729A1 (fr)
WO (1) WO2011038921A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013210807A1 (de) * 2013-06-10 2014-12-11 Gräbener Pressensysteme GmbH & Co. KG Überlast-Löseeinrichtung in einer Servopresse
DE102017130425B4 (de) * 2017-12-19 2020-01-16 Schuler Pressen Gmbh Verfahren und Vorrichtung zur Nutzpresskrafterhöhung an Servopressen

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1199482B (de) * 1956-01-10 1965-08-26 Weingarten Ag Maschf Anwendung einer Presse zum Herstellen von Karosserieteilen aus Blech zum Pressen von glasfaserverstaerkten Kunstharzteilen
DE3507327A1 (de) * 1985-03-01 1986-09-04 Jörg 8607 Hollfeld Lange Exzenter-hydraulikpresse
JPH0239360B2 (ja) * 1985-04-13 1990-09-05 Akira Hirai Fukugoatsufuntaipuresu
DE4302263A1 (de) * 1993-01-28 1994-08-04 Horst Baltschun Mechanische Stufenpresse mit hydraulischen Arbeitshubeinheiten
DE102004006126B4 (de) * 2004-02-07 2006-12-28 Horst Baltschun Presse mit verriegeltem Stößel
EP1754595B1 (fr) * 2005-08-16 2014-08-20 Schuler Pressen GmbH Module d'entraînement pour presse et procédé pour fournir une gamme de presses

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2011038921A1 *

Also Published As

Publication number Publication date
DE102009043729A1 (de) 2011-04-21
WO2011038921A1 (fr) 2011-04-07

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