EP0286908B1 - Presse - Google Patents

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Publication number
EP0286908B1
EP0286908B1 EP88105119A EP88105119A EP0286908B1 EP 0286908 B1 EP0286908 B1 EP 0286908B1 EP 88105119 A EP88105119 A EP 88105119A EP 88105119 A EP88105119 A EP 88105119A EP 0286908 B1 EP0286908 B1 EP 0286908B1
Authority
EP
European Patent Office
Prior art keywords
converter
stroke
tool
delta
signals
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
EP88105119A
Other languages
German (de)
English (en)
Other versions
EP0286908A1 (fr
Inventor
Roderich Dipl.-Ing. Baisch
Günter Klose
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.)
Siemens AG
Original Assignee
Siemens 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 Siemens AG filed Critical Siemens AG
Publication of EP0286908A1 publication Critical patent/EP0286908A1/fr
Application granted granted Critical
Publication of EP0286908B1 publication Critical patent/EP0286908B1/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
    • B30B15/14—Control arrangements for mechanically-driven presses
    • B30B15/142—Control arrangements for mechanically-driven presses controlling the brake or the clutch
    • 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
    • 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
    • B30B15/148—Electrical control arrangements

Definitions

  • Press in which a clutch for disengaging the drive and braking of the tool is provided in the force path between a press drive and a tool performing the press stroke, means for detecting the position of the tool being provided and elements for triggering a fine stroke being provided.
  • Such presses can control the stroke of a tool either as mechanical presses with an eccentric ram arrangement or hydraulically with a piston arrangement.
  • the object of the invention is to design a press of the type mentioned at the outset such that defined fine strokes of the tool are triggered by manual keying.
  • this object is achieved by the fact that means for detecting the speed of the work tool are provided, that the position and speed corresponding identification signals of the aforementioned means can be fed to a converter such that a reference signal corresponding to a predetermined fine stroke and a direction signal corresponding to the direction of the respective fine stroke to be triggered can be fed to the converter and that with the presence of a trigger command for one fine stroke by the converter a control signal corresponding in duration to the predetermined fine stroke path can be triggered to engage the clutch.
  • mechanical presses can be a conventional clutch / brake unit which is arranged between the motor and the eccentric; in hydraulic presses, any control device that interrupts the flow of force can be regarded as a coupling.
  • a first advantageous embodiment of the invention is characterized in that the control signals for a large number of possible combinations of the identification, reference and direction signals are stored in the converter. This enables an extremely fast generation of the control signals.
  • each control signal is also possible for each control signal to be calculated from the characteristic, reference and direction signals in accordance with a further advantageous embodiment of the invention in accordance with press-specific equations of motion.
  • Such a circuit arrangement requires a converter that calculates relatively quickly, but does not require a large storage capacity for the converter.
  • a mechanical press is shown in the form of a block diagram, in which a motor M drives a flywheel S, which acts on a clutch K.
  • the clutch K is a clutch-brake unit which, when a control signal ST is discussed below on its generation, is sent to the clutch K, the flywheel S with one acting on the output side of the clutch K.
  • Eccentric E connects and if not Control signal ST is present, the output side of the clutch K is braked.
  • a plunger SL Arranged on the eccentric E in a plunger SL, which converts the rotary movement into a translatory movement for an upper tool OW attached to the plunger end.
  • the position and movement of the shaft driving the eccentric E is continuously monitored with the aid of an absolute encoder AG which outputs a first identification signal KS1 corresponding to the current position to a converter U1 and a converter U2.
  • a second identification signal KS2 which specifies the speed of the rotary movement of the eccentric E, is formed by the converter U1 from the identification signal KS1 and is likewise fed to the converter U2.
  • the upper tool OW mounted on the ram SL of the press can be moved against a lower tool UW.
  • the upper tool OW is to be moved within the possible stroke range by delta x that can be triggered manually.
  • delta x are indicated in an enlarged representation by a double arrow as + delta x and-delta x.
  • the fine strokes are reported to the converter U2 in the form of a reference signal RS via a setpoint generator SG.
  • the fine strokes are triggered by an operator by pressing keys T1 or T2.
  • the button T1 may serve, as indicated by an upward arrow, to raise the upper tool OW, the button T2 to lower the upper tool OW. This is indicated in a corresponding manner by a downward-pointing arrow in the symbol for the button T2.
  • the desired direction of movement is reported in the form of direction signals R1 and R2 on the one hand to the converter U2, and on the other hand the direction signals R1 and R2 control the direction of rotation of the motor M.
  • converter U2 forms a time period delta t for control signal ST for actuating clutch K.
  • the dependence of the Time delta t for each of the combinations can be determined once for each press from a same series by measurements.
  • a timer Z is activated via an OR gate O, which outputs the actual control signal ST for the clutch K in accordance with the time period delta t determined by the converter U2.
  • the electronic elements shown in the block diagram do not necessarily have to be provided as separate units, but can also be implemented by the program sequence of a conventional numerical control.

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

Claims (3)

1. Presse dans laquelle est prévu, dans la voie de transmission de force entre un dispositif d'entraînement de la presse et un outil déplacé sur la course de la presse, un accouplement servant à débrayer le dispositif d'entraînement et à freiner l'outil, et dans laquelle il est prévu des moyens pour détecter la position de l'outil, et des éléments déclenchant une course fine, caractérisée par le fait qu'il est également prévu des moyens pour détecter la vitesse de l'outil (OW), que des signaux caractéristiques (KS1, KS2), qui correspondent à la position et à la vitesse, des moyens indiqués précédemment peuvent être envoyés à un convertisseur (U2), qu'en outre un signal de référence (RS), qui correspond à une course fine prédéterminée (delta x), et un signal de direction (R1, R2), qui correspond à la direction de la course fine (delta x) devant être respectivement déclenchée, peuvent être envoyés au convertisseur (U2), et que lors de la présence d'un ordre de déclenchement d'une course fine (delta x) par le convertisseur (U2), un signal de commande (ST), dont la durée (delta t) correspond à la course fine et prédéterminée (delta x), peut être déclenché pour enclencher l'accouplement (K).
2. Presse suivant la revendication 1, caractérisé par le fait que les signaux de commande (ST) sont mémorisés dans le convertisseur (U2) pour une multiplicité de combinaisons possibles des signaux caractéristiques, du signal de référence et des signaux de direction (KS1, KS2, RS, RS1, RS2).
3. Presse suivant la revendication 1, caractérisée par le fait que chaque signal de commande (ST) est calculé en fonction de relations de déplacement, spécifiques à la presse, entre les signaux caractéristiques, le signal de référence et les signaux de direction (KS1, KS2, RS, R1, R2).
EP88105119A 1987-04-09 1988-03-29 Presse Expired - Lifetime EP0286908B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3712035 1987-04-09
DE3712035 1987-04-09

Publications (2)

Publication Number Publication Date
EP0286908A1 EP0286908A1 (fr) 1988-10-19
EP0286908B1 true EP0286908B1 (fr) 1991-03-27

Family

ID=6325248

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88105119A Expired - Lifetime EP0286908B1 (fr) 1987-04-09 1988-03-29 Presse

Country Status (3)

Country Link
EP (1) EP0286908B1 (fr)
DE (1) DE3862142D1 (fr)
ES (1) ES2021777B3 (fr)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2635200A (en) * 1946-09-03 1953-04-14 Gen Motors Corp Control mechanism
GB836607A (en) * 1955-09-23 1960-06-09 Igranic Electric Co Ltd Improvements in control systems for power operated forming presses
US2893529A (en) * 1956-05-28 1959-07-07 Bliss E W Co Differential transformer press control
GB810815A (en) * 1956-06-06 1959-03-25 Danly Mach Specialties Inc Inching assembly for power presses

Also Published As

Publication number Publication date
ES2021777B3 (es) 1991-11-16
DE3862142D1 (de) 1991-05-02
EP0286908A1 (fr) 1988-10-19

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