EP0428780B1 - Presse à poinçonner avec entrée de valeur de correction pour la profondeur de pénétration et la longueur d'alimentation - Google Patents

Presse à poinçonner avec entrée de valeur de correction pour la profondeur de pénétration et la longueur d'alimentation Download PDF

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Publication number
EP0428780B1
EP0428780B1 EP89121629A EP89121629A EP0428780B1 EP 0428780 B1 EP0428780 B1 EP 0428780B1 EP 89121629 A EP89121629 A EP 89121629A EP 89121629 A EP89121629 A EP 89121629A EP 0428780 B1 EP0428780 B1 EP 0428780B1
Authority
EP
European Patent Office
Prior art keywords
control
characteristic curve
punch press
regulating
strokes
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
EP89121629A
Other languages
German (de)
English (en)
Other versions
EP0428780A1 (fr
Inventor
Oskar Eigenmann
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.)
Bruderer AG
Original Assignee
Bruderer AG
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 Bruderer AG filed Critical Bruderer AG
Publication of EP0428780A1 publication Critical patent/EP0428780A1/fr
Application granted granted Critical
Publication of EP0428780B1 publication Critical patent/EP0428780B1/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
    • B21D43/021—Control or correction devices in association with moving strips
    • 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
    • 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
    • Y10T83/141—With means to monitor and control operation [e.g., self-regulating 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
    • Y10T83/141—With means to monitor and control operation [e.g., self-regulating means]
    • Y10T83/148—Including means to correct the sensed operation
    • 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
    • Y10T83/141—With means to monitor and control operation [e.g., self-regulating means]
    • Y10T83/148—Including means to correct the sensed operation
    • Y10T83/152—And modify another operation

Definitions

  • the present invention relates to a punch press with stroke rate adjustment and a control device containing a target characteristic, by means of which signals for an adjusting device according to the target characteristic can be generated, and by which setting device an immersion depth adjustment of the punch of the punch press while the punch press is running as a function of the signals the control or regulating device takes place.
  • the invention relates to a punch press with stroke rate adjustment and a control device containing a target characteristic, by means of which signals for an adjusting device according to the target characteristic can be generated and by which adjusting device a feed length setting for the material to be punched while the punch press is running as a function of the signals the control or regulating device takes place.
  • Setpoint deviations also occur in the feed device, in which the dimension of the feed length deviates from a respectively predetermined setpoint, with increasing number of strokes and accelerated belt mass forming further sources of error.
  • the invention seeks to remedy this.
  • the invention as characterized in the claims solves the task of creating a punch press in which these disadvantages do not occur and in which parts can be produced with the desired precision over the entire range of strokes with each tool, in that the control device has an input means by means of which a value deviating from the target characteristic curve can be entered for the immersion depth at any number of strokes, and that the control or regulating device for generating the signals is designed in such a way that the entered value can be changed as a function of the stroke number and can be linked to the desired characteristic curve.
  • control or regulating device has an input means by means of which a value for the feed length deviating from the nominal characteristic curve can be entered at any number of strokes, and that the control or regulating device for generating the signals is designed in such a way that the entered value can be changed depending on the stroke rate and can be linked to the target characteristic curve.
  • the control or regulating device proceeds analogously when changing the target feed length value.
  • FIGS. 1-4 show in simplified form the parts of a punch press that are essential for understanding the invention.
  • the crank arm 1, the levers 2, the adjusting spindles 3, the drive connecting rods 4, the plunger 5 and the table 6 are drawn from the punch press.
  • WHS means the tool closing height.
  • the deflection amount F and the play S are shown schematically in accordance with the respective operating states.
  • Figure 3 shows the same machine that with a stroke rate of 100 H / min. punches. The speed is therefore again the same as that of FIG. 1.
  • the upper tool part 8, the lower tool part 9 and the workpiece, i.e. the tape 10 from which the product is punched and embossed is shown.
  • the reference number 13 denotes a punched-out piece of material.
  • Figure 4 shows the machine with a high number of strokes, ie analogous to the number of strokes in FIG. 2. Because of the large dynamic forces (at approx. 300-400 h / min.) the game is run through and at the same time the dynamic suspension analogous to FIG. In order to keep the tool closing height WSH constant again, the plunger adjustment would have to be corrected by the amount F + S.
  • FIG. 5 schematically shows a block diagram of a known regulation, which is basically based on FIG. 1 of DE-PS 27 31 084.
  • the number of strokes is fed from a corresponding sensor 26 to a first element 20, in which a target characteristic curve is stored.
  • a target characteristic curve is provided for each tool used.
  • the target characteristic is programmable via an input 21 of the control device.
  • the target characteristic curve e.g. represents the immersion depth as a function of the number of strokes.
  • a comparator the target immersion depth emitted by the element 20 is compared with the actual immersion depth, which is measured by a sensor 25 on the motor 24 of the immersion depth adjustment.
  • the element 22 activates one of the switches 23 in order to actuate the motor for the immersion depth adjustment for raising or lowering the ram or tool. The actuation continues until the actual value is again adjusted to the setpoint within the control accuracy.
  • FIG. 6 shows roughly schematically how the control device of a punch press according to the invention can be designed. Only one element 30 of the control device is shown, which is basically the element 20 of Figure 5 corresponds. The further elements of FIG. 5 have been omitted from FIG. 6 for the sake of simplicity. These elements 22, 23, 24, 25 are basically of the same design in the control device according to FIG. 6 as in the known control device according to FIG. 5.
  • Element 30 also has a tool-specific target characteristic curve of a known type that has been programmed via input 21. It also has an input for a stroke-dependent signal from a sensor 26.
  • An input or input means 31 is now provided, by means of which a value can be entered by which the immersion depth is corrected at the number of strokes present at the moment.
  • FIG. 7 shows a target characteristic curve 40 in an immersion depth / stroke rate diagram.
  • this nominal characteristic curve is shown as a straight line. While this is correct for a feed device, the target characteristic curve for the immersion depth will usually be parabolic.
  • the schematic nominal characteristic curve shows the value to which the immersion depth is adjusted at the respective number of strokes.
  • the setpoint characteristic curve can inevitably only be an imperfect image of the complex real function.
  • the parts punched according to the nominal characteristic curve can show large deviations from the desired manufacturing tolerance, even - and especially - if the control device according to FIG. 5 follows the nominal value characteristic curve 40.
  • the control device of the punch press according to the invention therefore has input 31, into which a value can be entered by which the control device detaches itself from the setpoint characteristic.
  • FIG. 7 shows how this manifests itself in the immersion depth / stroke diagram.
  • the operator of the stamping press was able to determine that the operation on the associated target characteristic point 42 does not give the desired precision of the stamped parts.
  • the control device can receive a correction value via input 31 W can be entered.
  • the punch press then works at the operating point 41, which results from the nominal characteristic curve 40 and the entered correction value W.
  • the value W can be entered using a wide variety of means, for example using a numerical keyboard as a digital value, using a variable resistor as an analog value or using ⁇ keys in predetermined small steps. The type of input will depend on the design of the control device.
  • W can of course be larger or smaller or can also be effective on the other side of the target characteristic curve, so that an operating point 43 would result. If the precision of the parts achieved at the new operating point 41 is not satisfactory, a different value for W can of course be entered.
  • the value W is automatically changed by the control device. This can be done continuously, so that there is again a continuous curve (shown as curve 44 in dashed lines) between the stroke numbers H1 to H4 or H max to H min . This can be done in such a way that an additional characteristic curve is calculated from the known nominal value characteristic curve parameters, which in the example shown passes through the new operating point 41 and touches or intersects the nominal value characteristic curve at the minimum number of strokes.
  • corrected correction values W2 to W4 only for individual stroke numbers H2 to H4, the new "operating setpoint curve" which arises, for example, being step-like or being formed between the points by a straight line.
  • the nominal characteristic curve 40 is parabolic for the immersion depth, and when it is changed, all parabolic parameters are recalculated starting from the value W set at any number of strokes, and a new nominal nominal characteristic curve is thus formed.
  • the control device is of course preferably formed by a digital process control, which carries out the necessary calculations and the corresponding regulation.
  • FIG. 6 indicates, for example, how a configuration of the control device according to the invention can be achieved with little effort.
  • the signal at the output 33 to the comparator 22 is formed in such a way that an adder / subtractor 35 links the basic value from the setpoint characteristic curve with the entered value W in order to obtain the new operating point.
  • a second adder / subtractor 36 is activated, which from the previous new operating point 41 e.g. counts a constant K when the number of strokes drops or adds the constant K when the number of strokes increases.
  • the control device is preferably provided with a memory in which at least one value W, at most the entire new target operating characteristic and a number associated with the tool, can be stored are. This makes it possible to call up a tool that has already been used and has been driven with a changed setpoint characteristic curve and to start operation on the changed curve.
  • the above statements regarding the immersion depth also apply to the feed length.
  • the corresponding setpoint characteristic curve can be a straight line.
  • the principle of correction and the means used remain the same.
  • only one of the corrections that is, either the feed length or the immersion depth, can be carried out on a punch press.
  • both options are provided in the same punch press.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Presses (AREA)
  • Punching Or Piercing (AREA)

Claims (8)

  1. Presse d'emboutissage avec réglage du nombre d'oscillations et une unité de commande et de régulation (30) comportant une courbe de consigne (40) et agencée pour engendrer en fonction de celle-ci des signaux destinés à un dispositif de réglage, le dispositif de réglage réglant la profondeur de pénétration du poinçon (5) de la presse au cours de la marche de celle-ci et en fonction des signaux émanant de l'unité de commande et de régulation, caractérisée en ce que l'unité de commande et de régulation (30) possède un organe récepteur (31) agencé pour recevoir une valeur différente de celle indiquée par la courbe de consigne (40) pour la profondeur de pénétration à un nombre arbitraire (H) d'oscillations, et en ce que l'unité de commande et de régulation est agencée de manière à ce que la valeur introduite (W) puisse être modifiée en fonction du nombre d'oscillations et combinée avec la courbe de consigne (40).
  2. Presse d'emboutissage selon la revendication 1, caractérisée en ce que l'unité de commande et de régulation (30) comporte une mémoire capable de mémoriser au moins une valeur qui y a été introduite.
  3. Presse d'emboutissage selon la revendication 1, caractérisée en ce que l'unité de commande et de régulation (30) est agencée pour combiner une valeur qui y a été introduite avec une valeur caractéristique de l'outil d'emboutissage utilisé.
  4. Presse d'emboutissage selon une des revendications 1 à 3, caractérisée en ce que l'unité de commande et de régulation (30) est agencée pour mémoriser une courbe de consigne en forme de parabole et pour modifier tous les paramètres de la parabole en fonction du nombre d'oscillations.
  5. Presse d'emboutissage selon une des revendications 1 à 4, caractérisée en ce que l'unité de commande et de régulation (30) est agencée pour produire en fonction d'une seconde courbe de consigne des signaux pour un dispositif d'avancement de la presse, que l'organe récepteur est prévu pour recevoir une valeur différente de celle déterminée par la seconde courbe de consigne pour la longueur de l'avance du matériau à emboutir et que l'unité de commande et de régulation est agencée pour engendrer les signaux régulateurs de l'avance de manière à ce que la valeur introduite puisse être modifiée en fonction du nombre d'oscillations et combinée avec la courbe de consigne.
  6. Presse d'emboutissage avec réglage du nombre d'oscillations et une unité de commande et de régulation (30) comportant une courbe de consigne (40) et agencée pour engendrer en fonction de celle-ci des signaux destinés à un organe de réglage de la longueur de l'avance du matériau à emboutir lorsque la presse est en marche et en fonction des signaux émis par l'unité de commande et de régulation (30), caractérisée en ce que l'unité de commande et de régulation (30) possède un organe récepteur (31) agencé pour recevoir une valeur (W) différente de celle indiquée par la courbe de consigne (40) pour la longueur d'avance à un nombre arbitraire d'oscillations (H), et en ce que l'unité de commande et de régulation (30) pour engendrer les signaux est agencée de manière à ce que la valeur introduite (W) puisse être modifiée en fonction du nombre d'oscillations et combinée avec la courbe de consigne (40).
  7. Presse d'emboutissage selon la revendication 6, caractérisée en ce que l'unité de commande et de régulation (30) comporte une mémoire pouvant mémoriser au moins une valeur qui y a été introduite.
  8. Presse d'emboutissage selon la revendication 7, caractérisée en ce que l'unité de commande et de régulation (30) est agencée pour combiner une valeur qui y a été introduite avec une valeur caractéristique de l'outil d'emboutissage utilisé.
EP89121629A 1988-10-28 1989-11-23 Presse à poinçonner avec entrée de valeur de correction pour la profondeur de pénétration et la longueur d'alimentation Expired - Lifetime EP0428780B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH4039/88A CH676445A5 (fr) 1988-10-28 1988-10-28

Publications (2)

Publication Number Publication Date
EP0428780A1 EP0428780A1 (fr) 1991-05-29
EP0428780B1 true EP0428780B1 (fr) 1993-12-22

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EP89121629A Expired - Lifetime EP0428780B1 (fr) 1988-10-28 1989-11-23 Presse à poinçonner avec entrée de valeur de correction pour la profondeur de pénétration et la longueur d'alimentation

Country Status (4)

Country Link
US (1) US5099731A (fr)
EP (1) EP0428780B1 (fr)
CH (1) CH676445A5 (fr)
DE (1) DE58906506D1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4101603A1 (de) * 1991-01-21 1992-07-23 Kaiser Kg Otto Verfahren zum konstanthalten der vorschublaengen
US6868351B1 (en) * 1999-10-19 2005-03-15 The Minster Machine Company Displacement based dynamic load monitor
US6582166B1 (en) 1999-10-22 2003-06-24 Gerber Scientific Products, Inc. Method of compensating for cutter deflection
ATE418444T1 (de) * 2000-08-01 2009-01-15 Haulick & Roos Gmbh Press- oder stanzautomat
KR200353163Y1 (ko) * 2004-03-26 2004-06-14 디앤크래프트 주식회사 펀칭과 엠보싱을 동시에 할 수 있는 펀치
PL1879266T3 (pl) * 2006-07-13 2013-08-30 Schaefer Werkzeug & Sonderma Sposób i urządzenie do ustawiania ruchu skokowego urządzenia zagniatającego

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1099192A (en) * 1964-01-15 1968-01-17 Hordern Mason & Edwards Ltd Improvements relating to feeding devices for power presses or like machine tools
DE2731084C3 (de) * 1977-07-09 1980-07-03 L. Schuler Gmbh, 7320 Goeppingen Stößelverstellung für schnellaufende Schnittpressen
GB2099750B (en) * 1981-06-06 1985-06-26 Samco Strong Ltd Stroke control for press
DE3274074D1 (en) * 1982-01-08 1986-12-11 Fanuc Ltd A spindle head unit
DE3432235A1 (de) * 1984-09-01 1986-03-13 Unidor GmbH, 7534 Birkenfeld Verfahren zum konstanthalten einer vorgewaehlten vorschublaenge einer bandvorschubeinrichtung an einer werkzeugmaschine
US4823658A (en) * 1985-10-18 1989-04-25 Spicer Andrew I Punch presses

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Publication number Publication date
CH676445A5 (fr) 1991-01-31
DE58906506D1 (de) 1994-02-03
EP0428780A1 (fr) 1991-05-29
US5099731A (en) 1992-03-31

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