EP0741001B1 - Estampeuse, imprimeuse et poinçonneuse - Google Patents

Estampeuse, imprimeuse et poinçonneuse Download PDF

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Publication number
EP0741001B1
EP0741001B1 EP96105837A EP96105837A EP0741001B1 EP 0741001 B1 EP0741001 B1 EP 0741001B1 EP 96105837 A EP96105837 A EP 96105837A EP 96105837 A EP96105837 A EP 96105837A EP 0741001 B1 EP0741001 B1 EP 0741001B1
Authority
EP
European Patent Office
Prior art keywords
pressure
machine according
press
control
control program
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
EP96105837A
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German (de)
English (en)
Other versions
EP0741001A3 (fr
EP0741001A2 (fr
Inventor
Hanspeter Gietz
Manfred Rösli
Heinz Bänziger
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.)
Gietz AG
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Gietz AG
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Filing date
Publication date
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Publication of EP0741001A2 publication Critical patent/EP0741001A2/fr
Publication of EP0741001A3 publication Critical patent/EP0741001A3/fr
Application granted granted Critical
Publication of EP0741001B1 publication Critical patent/EP0741001B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/0029—Details of, or accessories for, presses; Auxiliary measures in connection with pressing means for adjusting the space between the press slide and the press table, i.e. the shut height
    • B30B15/0041—Control arrangements therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/0094—Press load monitoring means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/14—Control arrangements for mechanically-driven presses

Definitions

  • the invention relates to an embossing printing and punching machine according to the preamble of independent claim.
  • EP 596 697 is a hydraulic Sheet metal press with automatic hydraulic pressure control for the deformation of Body panels known.
  • the press pressure is controlled by four hydraulic cylinders in the four corners of the press, the pressure values using four sensors can be controlled automatically independently of each other.
  • Such slow hydraulic presses with relatively rough hydraulic pressure control However, the requirements of faster, more precise embossing presses can absolutely not meet.
  • embossing presses with precise mechanical presses are known, which, however, do not have an automatic pressure force control.
  • Embossing presses are usually only at one point of the pressure force measurements Machine and outside of the embossing printing area known.
  • this requires elaborate conversions depending on the location of the clichés to estimate the Compressive forces on the embossed image surface.
  • these force measurements are inaccurate and unreliable. Influences that change the working pressure and thus the Print quality deteriorate, and therefore cannot be recorded well Changes in the course of a work process can be compensated even less. Uneven pressure distributions on the embossed printing area cannot be recorded become.
  • embossing-printing and Punching machine according to claim 1.
  • the arrangement of several pressure sensors around Embossed printing area around enables precise pressure force determination and Monitoring.
  • the combination of mechanical precision press with the mechanical positioning device with controlled sliding drive with which Pressure control program and with pressure force control through mechanical displacement the positioning device in very small steps in the Y direction enables set optimal working pressures and these also under negative influences of the operation to be kept constant and optimal, so that constant highest embossing quality is achieved.
  • the dependent claims relate to advantageous developments of the invention, which further automate, improve and simplify their functions make more reliable.
  • the automatic execution of Operations such as touching, keeping working pressure constant and almost any to be able to drive programmable pressure setpoint curves.
  • the inventive The machine enables compliance with safety and limit values as well as Detection of uneven, eccentric pressure distribution on the Embossing surface.
  • the various variable influences on the Working pressure which deteriorate the quality e.g. due to thermal influences or increasing, permanent deformation or change in thickness of the dressing and due to fluctuations in paper thickness, largely compensated. So that is highest possible and constant embossing quality with minimal operating effort and accessible with the greatest possible security.
  • FIG. 1 a shows a side view of an embossing printing and punching machine 1 according to the invention with an upper press part 3 which is held by side supports 6, with an upper support 5, a positioning or displacement device 10 and a press head 9.
  • This head 9 carries a tool - Or Clichéplatte 4 with a heater 7, which includes, for example, several individually adjustable heating zones.
  • a lower press part 19 here has a toggle lever mechanism with four toggle lever pairs 17, which move a press table 13 up and down by a stroke H of, for example, 80 mm.
  • a counterpressure or dressing plate 14 is attached to the table 13, the surface of which forms the embossing printing surface F (ie the maximum usable embossing surface).
  • Clichés 8 are attached to the tool plate 4, the surfaces of which define the embossed image area FC (see FIGS. 1b and 2).
  • a dressing 15 adapted to the clichés 8 is inserted on the dressing plate 14, which consists, for example, of a 1-2 mm thick, fabric-reinforced plastic plate, of hard laminate, for example Pertinax, or of less hard material such as pressboard or unreinforced plastic.
  • the material and layer thickness are adapted to the clichés and the embossed goods.
  • the preparation is adjusted in a known manner to optimal embossing quality.
  • the optimal embossing pressure or the embossing pressure force X is determined by displacement of the positioning device 10 in the Y direction.
  • a drive 20 is a controlled adjustment motor, e.g. a servo motor with incremental encoder and an assigned motor control 21.
  • the shift Y takes place via a transmission 16 to a spindle 12, which has a sliding wedge 11 moves.
  • the maximum possible displacement range of Y is e.g. 4 mm, which enables different layer thicknesses of dressing and compensate for embossed goods.
  • FIG. 1b As shown in Figure 1b as a partial representation of the machine 1 seen from above is, several compressive force sensors S1 to S4 or S5 to S8 around the Center Z of the embossing printing surface F of the plate 14 is arranged around.
  • the Compression force measurement takes place e.g. through strain gauges such as strain gauges (DMS) or piezo elements, which are on suitable, under load the chassis elements of the machine that experience significant stretching are attached are.
  • strain gauges S1 to S4 on the side beams 6 attached. These could also be attached to the press head 9.
  • the pressure forces can also be measured with pressure cells S5 to S8 which e.g. arranged in the four corners under a toggle 17 are as shown in Fig. 1a.
  • FIG. 2 shows a further example with a triangular arrangement sensors S9 to S11 and an eccentric arrangement of the clichés or of the embossed image areas FC1 and FC2, which put a higher load on the Side of sensor S9.
  • each individual sensor can be considered the maximum allowable Value assigned a safety value XMi and its compliance monitored become.
  • X XS1 + XS2 + XS3 + XS4.
  • Figure 3 shows a circuit diagram of the machine according to the invention with pressure transducers S1 to S4, which with the pressure control 30 or the machine control 2 are connected.
  • the positioning servomotor 20 with motor control 21 is also with the machine control 2 and the pressure control 30 connected.
  • To the operating and display device 40 which e.g. as Is designed touch screen, there is a bidirectional communication with the controls 30 and 2.
  • a further output 35 can additionally be provided be for bidirectional connection to an external computer, e.g. with a PC, to output operating data and to enter additional data Functions.
  • FIG. 4 shows a characteristic that is valid for a specific dressing X1 (Y), i.e. that in function of the displacement Y by the press on the embossing generated compressive force X1.
  • This characteristic can be driven automatically and be included if e.g. in the control program following function is entered:
  • This characteristic X (Y) is of course dependent on the clichés and the finish (type of material, thickness and size), ie it characterizes this finish and this specific embossing process.
  • this characteristic X (Y) of a given dressing changes gradually, for example from curve X1 (Y) in the initial state to curve X2 (Y) after a certain runtime, because the dressing wears out or is compressed more and more over the course of time an embossing.
  • the head 9 must therefore be readjusted around the area Y12.
  • FIG. 5 shows the course of pressure measurement signals as a function of time t: X1 (t).
  • the pressure curve has a broad maximum at top dead center OT.
  • the displacement in Y by the adjusting device 10 always takes place without Pressure (i.e. in the area of impression).
  • too Zero points of the sensor values adjusted adjusted (adjustment of a zero point drift of the Measurement signals, e.g.
  • X1 corresponds to the work value XA, at which the optimal embossing quality is achieved.
  • An adjustable and selectable tolerance + XT, -XT is assigned to this work value XA.
  • the curve with compressive force value X2 is below the tolerance range XA - XT, the value X3 lies above the tolerance range XA + XT and the curve with pressure force value X4 corresponds to the safety value XM, ie the maximum permissible press pressure.
  • FIG. 6 illustrates various influences which change over time Characteristic Y (X) (FIG. 4), or changes in threshold values Y0 (t) and work values YA (t) for given constant compressive force values X0 and XA effect: This is shown with the curves Ytemp, Yzu and Ypap.
  • the most varied of operating modes are possible possible. These are stored as functions in the print control program 30 and can be selected via the control and display device 40, or also can be entered externally via output 35. So that can various operating parameters regarding an embossing print job as well Limit values, tolerances, switching values and programmed setpoint curves (see Fig. 8) entered or reprogrammed.
  • the press is in the brought top dead center and stopped.
  • the pressure measurement takes place here continuously and no longer cyclically as during normal operation the machine in "RUN” mode (see Fig. 5).
  • OT is now the adjusting device 10 is automatically shifted, i.e. Y is increased until a Pressure rise is measured.
  • a minimum adjustable pressure threshold X0 is reached, the shift Y is stopped and the corresponding one Value Y0, i.e. this position, saved. This is in Fig. 4 shown.
  • the actual value of the regulation is preferably determined continuously as the mean value Xm from the n-last pressure force measurements.
  • the control difference DX is e.g. 5 - 10 kN and the regulation adjustment step DY e.g. 1 - 2 u.
  • a readjustment area YN selected and entered by e.g. YN 0.1 mm.
  • YN 0.1 mm.
  • a signal is output and the machine is stopped if necessary. Then can the operator decides whether he goes beyond this adjustment range YN should continue - by specifying a new second adjustment range from e.g. 0.05 to 0.1 mm - or whether the dressing changed and restarted shall be.
  • Fig. 7 further illustrates which different temporal pressure force profiles X (t) shows.
  • the curve X5 (t) runs according to the "REG" mode in a narrow control range between an upper limit XA + DX and a lower limit XA - DX.
  • XA + DX a lower limit XA + DX
  • XA - DX a lower limit XA - DX
  • curve X6 (t) shows the pressure force curve if the displacement Y is kept constant.
  • these influences had to be continuously monitored and monitored by the machine operator periodically be compensated by hand by tracking the displacement Y, which corresponds to the curve X7 (t). This was very complex and moreover inaccurate, so that practically only an effectively driven curve X7 (t) with significantly fluctuating pressure force values was achieved.
  • the resulting embossed print quality is of course much better in accordance with the new curve X5 (t) with automatic constant control than in the curve X7 (t) that was previously achievable.
  • operating errors can also be avoided with the automatic functions and controls of the machine according to the invention.
  • the pressure force curve X (t) driven can not only be automatic are kept constant according to curve "REG", but in principle it can also according to any given setpoint curve for the pressure force XX (t) be regulated by corresponding adjustment of the shift Y.
  • curve XX1 shows a rapid Increase followed by a slow decrease and finally ending in constant pressure force according to. Operating mode "REG”.
  • stamping orders can be determined automatically, more precisely and more comprehensively.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Control Of Presses (AREA)

Claims (13)

  1. Machine d'emboutissage sous pression et d'estampage, comportant une commande de machine (2), une partie supérieure de presse (3) et un dispositif d'ajustement asservi ainsi qu'une partie inférieure de presse (19) présentant plusieurs capteurs de pression (S1 - S4) pour la mesure des forces de poussée X disposés autour du centre Z de la surface de poussée F, avec un programme de commande de pression présentant des fonctions de commande de la force de poussée et un appareil associé de service et d'affichage (40), caractérisée par
    une partie supérieure de presse dotée d'un chauffage (7), d'une plaque d'outil (4) pour la fixation de clichés (8), par un dispositif mécanique de positionnement (10) qui présente un entraínement mécanique de coulissement (20) avec une commande de moteur (21) associée pour le coulissement vertical de la plaque d'outil dans la direction Y,
    par une partie inférieure de presse dotée d'une presse mécanique à genouillère (17) présentant une course (H) définie avec précision et une plaque de contre poussée (14) avec un dispositif (15) servant d'appui pour des feuilles d'impression à emboutir, le programme (30) de commande de la pression présentant des valeurs prédéterminées de différence de pression (DX) et/ou des étapes d'ajustement (DY) pour la régulation de la valeur X de la force de poussée, la commande de la force de poussée s'effectuant par le coulissement mécanique du dispositif de positionnement (10) dans la direction Y.
  2. Machine selon la revendication 1, caractérisée en ce que quatre capteurs de pression (S1 - S4) sont disposés sur la machine, chacun associé à un coin de la surface F de poussée d'emboutissage.
  3. Machine selon la revendication 1, caractérisée en ce que comme capteurs de pression, des rubans de mesure d'allongement (DMS) sont installés sur des parties portantes (6) de la partie supérieure (3) de la presse.
  4. Machine selon la revendication 1, caractérisée en ce que le dispositif de positionnement présente un coin de coulissement (11) et un moteur d'ajustement régulé ou un servomoteur (20).
  5. Machine selon la revendication 1, caractérisée en ce que le programme (30) de commande de poussée présente différents modes de fonctionnement (REG, TOUCH) sélectionnables sur l'appareil de service (40).
  6. Machine selon la revendication 1, caractérisée en ce que le programme (30) de commande de poussée présente une fonction "toucher" (TOUCH).
  7. Machine selon la revendication 1, caractérisée en ce que le programme (30) de commande de poussée présente une fonction "maintenir constante la valeur de travail" (REG).
  8. Machine selon la revendication 1, caractérisée en ce que le programme (30) de commande de poussée présente une fonction "commander l'évolution de la valeur de consigne de poussée (XX1, XX2)".
  9. Machine sera la revendication 1, caractérisée en ce que le programme de commande de poussée contient des valeurs de sécurité (XM, XMi), des valeurs limite et/ou des plages de tolérance (XT) fixes ou prédéterminables.
  10. Machine selon la revendication 1, caractérisée en ce que le programme de commande de poussée contient des valeurs prédéterminables de commutation (XT, DY) pour lesquelles des fonctions secondaires telles que l'arrêt de la machine ou des signaux d'alarme sont déclenchées.
  11. Machine selon la revendication 1, caractérisée en ce que la commande de poussée présente une régulation à trois points avec une différence de réglage DX et une étape d'ajustement du coulissement DY, la valeur effective étant formée en permanence comme valeur moyenne Xm des n dernières mesures de poussée.
  12. Machine selon la revendication 1, caractérisée en ce qu'une plage d'ajustement sélectionnable YN peut être établie et déclenche un signal lorsqu'elle est atteinte.
  13. Machine selon la revendication 1, caractérisée en ce que la commande de poussée présente une sortie bidirectionnelle (35) pour un calculateur externe.
EP96105837A 1995-05-04 1996-04-13 Estampeuse, imprimeuse et poinçonneuse Expired - Lifetime EP0741001B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH127995 1995-05-04
CH279/95 1995-05-04
CH27995 1995-05-04

Publications (3)

Publication Number Publication Date
EP0741001A2 EP0741001A2 (fr) 1996-11-06
EP0741001A3 EP0741001A3 (fr) 1997-02-26
EP0741001B1 true EP0741001B1 (fr) 2002-02-06

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EP96105837A Expired - Lifetime EP0741001B1 (fr) 1995-05-04 1996-04-13 Estampeuse, imprimeuse et poinçonneuse

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EP (1) EP0741001B1 (fr)

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DE102011055630A1 (de) 2010-12-06 2012-06-06 Foliotec Gmbh Kniehebelpresse mit Verstellvorrichtung für ein Werkzeugteil
DE202013102487U1 (de) 2013-06-11 2013-07-03 Karl Marbach Gmbh & Co. Kg Stanzmaschine mit reduzierter dynamischer Verformung durch optimierte Krafteinleitung
CN110421087A (zh) * 2019-09-05 2019-11-08 台州弘锐精密机械有限公司 一种立式数控冲压机顶升脱模机构

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CN107107608B (zh) * 2014-12-04 2019-07-05 吉茨公司 包括箔条引导装置和单张引导装置的平面烫印机
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CN110883212B (zh) * 2019-12-18 2021-04-23 太仓韬信信息科技有限公司 一种板材的连续冲压成型方法

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Publication number Priority date Publication date Assignee Title
DE102011055630A1 (de) 2010-12-06 2012-06-06 Foliotec Gmbh Kniehebelpresse mit Verstellvorrichtung für ein Werkzeugteil
DE102011055630B4 (de) * 2010-12-06 2014-12-04 KH Foliotec GmbH Kniehebelpresse mit Verstellvorrichtung für ein Werkzeugteil
DE202013102487U1 (de) 2013-06-11 2013-07-03 Karl Marbach Gmbh & Co. Kg Stanzmaschine mit reduzierter dynamischer Verformung durch optimierte Krafteinleitung
CN110421087A (zh) * 2019-09-05 2019-11-08 台州弘锐精密机械有限公司 一种立式数控冲压机顶升脱模机构

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EP0741001A3 (fr) 1997-02-26
EP0741001A2 (fr) 1996-11-06

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