EP2177346A2 - Système de commande destiné à influencer la dynamique des machines de pressage - Google Patents

Système de commande destiné à influencer la dynamique des machines de pressage Download PDF

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Publication number
EP2177346A2
EP2177346A2 EP09012985A EP09012985A EP2177346A2 EP 2177346 A2 EP2177346 A2 EP 2177346A2 EP 09012985 A EP09012985 A EP 09012985A EP 09012985 A EP09012985 A EP 09012985A EP 2177346 A2 EP2177346 A2 EP 2177346A2
Authority
EP
European Patent Office
Prior art keywords
press
clutch
crankshaft
ram
movement
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Withdrawn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
EP09012985A
Other languages
German (de)
English (en)
Other versions
EP2177346A3 (fr
Inventor
Dipl.-Ing. Herbert Seeger
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.)
Ortlinghaus Werke GmbH
Original Assignee
Ortlinghaus Werke GmbH
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 Ortlinghaus Werke GmbH filed Critical Ortlinghaus Werke GmbH
Publication of EP2177346A2 publication Critical patent/EP2177346A2/fr
Publication of EP2177346A3 publication Critical patent/EP2177346A3/fr
Withdrawn legal-status Critical Current

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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
    • B30B1/266—Drive systems for the cam, eccentric or crank axis
    • 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

Definitions

  • the present invention relates to wegoffe pressing machines according to the preamble of the main claim.
  • the press ram pass through a predetermined by the kinematics of the main gear path, such as in presses with crank or cam gear.
  • the brake in a pressing machine in question preferably performs a safety function by spring preload in the closing direction and is hydraulically released.
  • the clutch is acted upon hydraulically in its closed position.
  • these presses may, on the one hand, have a fixed total stroke, e.g. Presses with sliding crank gear and on the other hand have a variable total stroke, as is the case with eccentric presses.
  • the invention has for its object to provide a control system available with which in particular in conventional, equipped with flywheel, clutch and brake presses, the movements and the forces of the press ram can be influenced in a simple manner, without machine-specific factors in the Control need to be involved.
  • the angular velocity of the crankshaft and the transmitted torque can thus be flexibly adapted to predetermined working values.
  • the magnitude of the values, the angular velocities and torques that occur at the crankshaft, are particularly dependent on the clutch slip, which in one embodiment is influenced by the variable pressure generation and can vary between zero and one hundred percent.
  • press rams which are operatively connected to a crankshaft acted upon according to the invention, can be given a modifiable motion kinematical profile in a simple manner.
  • the ram forces and the speed of movement of the press ram can be influenced without the need for a complex servo-electric drive for the press drive.
  • the crankshaft can be given a predetermined torque profile in order, for example, to move the press ram when passing through its working range with a predetermined force.
  • a further advantage of the invention is that the plunger movement can be synchronized with the transfer in a simple manner even with an eccentric press.
  • the brake within the clutch-brake combination used is a safety brake, so that it is always ensured in an emergency that the plunger movement reliably stops.
  • a measuring system is provided to detect the height of the formed inside the press formed workpiece. In this way, an optimal transfer movement can take place without the risk of a collision of the workpiece with the press ram (s).
  • At least one pressure sensor is provided for measuring the hydraulic pressure.
  • a control technology integration of the pressure sensor (s) is provided in order to be able, according to the invention, to make exact pressure settings to maintain this motion profile based on the crankshaft movement and a motion profile for the crankshaft, for example, stored within the control.
  • the speed of the crankshaft can be influenced so that the movement of the press ram descends a predetermined speed profile.
  • the speed profile can correspond, for example, to a material-specific permissible rate of deformation of the respective workpiece to be machined.
  • the ram speed in the work area or in the drawing area of the Press ram is constant, whereby, for example, a maximum allowable strain rate can be maintained and so with minimal effort, an advantageous operating speed is achieved.
  • a hydraulic control which has a press safety valve. This increases the safety category of the press even further.
  • the clutch-brake combination has a cooling circuit.
  • the figures show an inventive controlled press 1 with electric drive.
  • An electric drive which is not shown in greater detail in the figures, drives a system, which is likewise not shown in more detail, and which is operatively connected to a crankshaft 3 via a standard rotary input 15 and a hydraulically actuated clutch / brake combination.
  • any other applied clutch-brake combination can be used, for example one after Figure 3 Electromagnetically acted clutch-brake combination. For these cases, the explanations apply accordingly.
  • the crankshaft 3 is assigned at least one movably mounted press ram 4 for accommodating tool lower parts 5 and upper tool parts 6.
  • the press 1 is equipped with an electronically controlled transfer for transporting workpieces 7 to and from the press 1.
  • means for recording provided the ram movement and the synchronization of the plunger movement with the transfer movement.
  • the clutch-brake combination 2 is applied hydraulically in the closing direction.
  • the clutch / brake combination 2 fulfills a safety function of the brake by spring preload in the closing direction so that it is hydraulically released - here.
  • Such a system of clutch and brake may also consist of individual clutches and individual brakes. Therefore, since the invention is applicable to both embodiments, with the clutch-brake combinations 2 listed below always includes all equally effective systems of clutch and brake.
  • variable pressure generation for the hydraulic pressure or a variable other input variable, e.g. U is provided for actuating the clutch-brake combination 2, which is coupled with the movement of the crankshaft 3 control technology.
  • the angular velocity of the crankshaft 3 and also the transmitted torque can be flexibly adapted to predetermined operating values.
  • the forces and the movements of the press ram 4 are thus not only dependent on the electric motor and the coupled transmission kinematics, but can be modified in a simple manner.
  • a significant advantage of the invention is that the forces on the press ram 4 can be adapted in a simple manner to material-specific properties of the workpiece 7 without, for example, the transmission kinematics must be changed constructively.
  • Another advantage of the invention is that the transfer movement of the workpieces 7 can be easily synchronized with the movement of the press ram 4 in a simple manner, for example, even with eccentric presses.
  • the figures show that a measuring system 8 is provided for detecting the angle of rotation of the crankshaft 3.
  • the measuring system 8 sends a signal proportional to the speed of the crankshaft 3 to an electric control 16.
  • the measuring system 8 consists essentially of an optical encoder, e.g. a grid 18 extending around the crankshaft circumference and an optical detector associated with the grid 18.
  • an optical encoder e.g. a grid 18 extending around the crankshaft circumference
  • an optical detector associated with the grid 18.
  • the rotational speed and the rotational position of the crankshaft 3 - or the position of the press ram 4 - can be reliably detected.
  • a black and white grid is used for the grid 18.
  • a measuring system 9 which detects the height of the molded workpiece 7 located inside the press 1.
  • the workpieces 7 can pass under the raised press ram 4, without risk of collision with the upper tool part 6 or lower tool part 5.
  • the show Fig. 1 and 2 in that at least one pressure sensor 10 is provided for measuring the hydraulic pressure is.
  • the pressure sensor 10 is connected to the electrical controller 16.
  • the system pressure associated with an activation according to the invention of the clutch / brake combination 2 can be reliably checked.
  • the pressure sensor 10 can be used to control the pressure generation.
  • the pressure generation is controllable and in the examples shown even infinitely variable.
  • a hydraulic pump 11 is used, which is driven by a servo motor 12.
  • the servomotor 12 is controlled by the electric controller 16 by means of an amplifier 17.
  • the system pressure can be infinitely adjusted to predetermined reference variables.
  • the pressure generation of the system pressure can be reproducibly compensated and, for example, easily connected with sophisticated diagnostic systems.
  • the engagement travel of the clutch and thus the rotational speed of the crankshaft 3 can be influenced via the variable pressure or via the voltage U such that the movement of the press ram 4 moves away from a predefined speed profile.
  • the velocity profile may be stored within the electrical controller 16 in a simple manner.
  • the measuring system 8 detects the movement of the crankshaft 3, so that the movement of the press ram 4 is detected on the basis of this movement. If the press ram 4 moves too fast or too slow with respect to the predetermined speed profile, the system pressure or the voltage U for acting on the clutch-brake combination 2 is adapted by means of a corresponding control of the servomotor 12 (FIG. Fig.1 and 2 ) or in Figure 3 the engagement of the clutch applied directly.
  • the ram speed is constant in the work area of the press ram 4. At an optimal workload of the press ram 7 so, for example, an allowable strain rate can be reliably maintained.
  • a press safety valve 13 which may for example consist of two redundant directional valves, which are hydraulically piloted.
  • the figures show that the clutch-brake combination 2 is associated with a cooling circuit 14. As a result, the heat-converted switching work is safely dissipated.
  • the clutch-brake combination 2 is designed for high slip times.
  • the system according to the invention can be retrofitted for all hydraulic or otherwise actuable clutches or brakes and their combinations.
  • the invention provides a simple system for press modernization without elaborate servomotors must be used for the control of the press ram or 4.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Presses (AREA)
  • Press Drives And Press Lines (AREA)
EP09012985A 2008-10-14 2009-10-14 Système de commande destiné à influencer la dynamique des machines de pressage Withdrawn EP2177346A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200810051209 DE102008051209B4 (de) 2008-10-14 2008-10-14 Steuerungssystem zur Einflußnahme auf die Stößeldynamik bei Pressmaschinen

Publications (2)

Publication Number Publication Date
EP2177346A2 true EP2177346A2 (fr) 2010-04-21
EP2177346A3 EP2177346A3 (fr) 2013-01-30

Family

ID=41491539

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09012985A Withdrawn EP2177346A3 (fr) 2008-10-14 2009-10-14 Système de commande destiné à influencer la dynamique des machines de pressage

Country Status (2)

Country Link
EP (1) EP2177346A3 (fr)
DE (1) DE102008051209B4 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011047661A3 (fr) * 2009-10-22 2011-09-15 Müller Weingarten AG Procédé de fonctionnement et dispositif destiné à faire fonctionner des presses
EP3067192A1 (fr) * 2015-03-09 2016-09-14 Ortlinghaus-Werke GmbH Dispositif de commande, système et procédé de fonctionnement d'un embrayage ou d'un frein

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005040263A1 (de) 2005-08-24 2007-03-01 Müller Weingarten AG Verfahren und Vorrichtung zur Steuerung und Regelung der Stößelbewegung an servo-elektrischen Pressen

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5680915A (en) * 1996-01-31 1997-10-28 Midwest Brake Bond Company Brake and clutch control system
ES2267653T3 (es) * 2000-12-02 2007-03-16 Bosch Rexroth Ag Mando hidraulico para una combinacion de freno-embrague accionado hidraulicamente, especialmente en el arbol de excentrica de una prensa mecanica.
EP1275854A1 (fr) * 2001-07-09 2003-01-15 Herion Systemtechnik GmbH Méthode et dispositif hydraulique de commande pour la protection contre les surcharges d'une presse mécanique actionnée par une combinaison embrayage-frein
JP2004034111A (ja) * 2002-07-04 2004-02-05 Komatsu Aatec Kk プレスの駆動装置およびその駆動方法
DE10327519A1 (de) * 2003-06-17 2005-01-20 Ortlinghaus-Werke Gmbh Hydraulische Schaltung
BRPI0621324A2 (pt) * 2006-02-06 2011-12-06 Abb Research Ltd sistema de acionamento de prensa mecánica aperfeiçoado

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005040263A1 (de) 2005-08-24 2007-03-01 Müller Weingarten AG Verfahren und Vorrichtung zur Steuerung und Regelung der Stößelbewegung an servo-elektrischen Pressen

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011047661A3 (fr) * 2009-10-22 2011-09-15 Müller Weingarten AG Procédé de fonctionnement et dispositif destiné à faire fonctionner des presses
US8631742B2 (en) 2009-10-22 2014-01-21 Mueller Weingarten Ag Method for operating presses
EP3067192A1 (fr) * 2015-03-09 2016-09-14 Ortlinghaus-Werke GmbH Dispositif de commande, système et procédé de fonctionnement d'un embrayage ou d'un frein

Also Published As

Publication number Publication date
EP2177346A3 (fr) 2013-01-30
DE102008051209A1 (de) 2010-04-15
DE102008051209B4 (de) 2012-02-16

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