EP0074421A1 - Deep-drawing arrangement for presses with mechanically driven drawing punch - Google Patents

Deep-drawing arrangement for presses with mechanically driven drawing punch Download PDF

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Publication number
EP0074421A1
EP0074421A1 EP81107203A EP81107203A EP0074421A1 EP 0074421 A1 EP0074421 A1 EP 0074421A1 EP 81107203 A EP81107203 A EP 81107203A EP 81107203 A EP81107203 A EP 81107203A EP 0074421 A1 EP0074421 A1 EP 0074421A1
Authority
EP
European Patent Office
Prior art keywords
sheet metal
piston
ram
pressure medium
metal holder
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.)
Granted
Application number
EP81107203A
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German (de)
French (fr)
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EP0074421B1 (en
Inventor
Heinz Gerber
Klaus Adam
Heinz Horn
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.)
L Schuler GmbH
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L Schuler 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 L Schuler GmbH filed Critical L Schuler GmbH
Priority to DE8181107203T priority Critical patent/DE3170614D1/en
Priority to EP81107203A priority patent/EP0074421B1/en
Priority to BR8207859A priority patent/BR8207859A/en
Priority to US06/525,906 priority patent/US4499750A/en
Priority to JP57502797A priority patent/JPS58501419A/en
Priority to PCT/DE1982/000181 priority patent/WO1983000821A1/en
Publication of EP0074421A1 publication Critical patent/EP0074421A1/en
Application granted granted Critical
Publication of EP0074421B1 publication Critical patent/EP0074421B1/en
Expired 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
    • B21D24/00—Special deep-drawing arrangements in, or in connection with, presses
    • B21D24/04—Blank holders; Mounting means therefor
    • B21D24/08—Pneumatically or hydraulically loaded blank holders

Definitions

  • the invention relates to a drawing device for presses with a mechanically driven ram and with a sheet metal holder, the holding force acting on the sheet metal, counteracting the drawing direction, is exerted via a pressure plate by means of a drawing cushion piston which supports it and is pressurized with pressure medium in a fixed drawing cushion cylinder.
  • the sheet metal is first pressed against the sheet holder by the drawing ring and then moved together with the latter against the pressure force acting in the drawing cushion cylinder, the sheet metal held between the sheet holder and drawing ring being simultaneously pulled by the drawing die of the one fixed on the press table Tool is deformed.
  • the drawing plunger moves the sheet metal holder against the pressure force acting on the drawing cushion piston, the drawing plunger also having to overcome the inertia force caused by the acceleration of the movable sheet metal holder and die cushion mass.
  • the sheet metal holder which is supported on the die cushion piston, namely forms a rigid system with a large, coherent mass, which has to be accelerated suddenly from rest to the speed of impact of the die rod.
  • a resilient member is arranged between the sheet metal holder and the movable masses of the die cushion.
  • the movable mass of the die cushion is accelerated in time after the mass of the sheet metal holder, so that the inertial forces of the entire system do not add up.
  • the resilient link causes a steady increase in speed of the die cushion piston up to the speed of the die ram.
  • This steady increase in speed of the die cushion piston reduces the effective inertia force of the die cushion piston.
  • the plunger hits the sheet at rest, lying on the sheet holder, at its given speed in this range of motion, so that there is an undamped impact.
  • the object of the invention is to avoid or at least reduce this impact impact in a pulling device of the type mentioned at the outset.
  • This object is achieved in that a piston is attached to the pressure surface acting in the direction of drawing, and that a ram path-dependent control is provided, by which the plunger is placed on the sheet metal holder by pressing the active surface with pressure medium on a movement can be accelerated in the direction of pull.
  • the sheet metal holder with the sheet metal lying thereon is already moving in the direction of drawing when the drawing ram strikes the sheet metal; the relative speed between the ram and the sheet is therefore lower than when it hits the stationary sheet. The impact impact is thereby mitigated or avoided entirely.
  • a particularly sensitive adjustment of the movement of the sheet metal holder to the movement of the drawing ram can be achieved in that the control influences the application of pressure medium to the active surface via a proportional oil valve.
  • the movement of the sheet metal holder in the drawing direction can expediently be accelerated to a speed which is equal to or slightly less than the speed of the drawing ram when it is placed on the sheet metal holder.
  • a pulling device is shown in a vertical section as an exemplary embodiment of the invention.
  • a lower tool 3 with a fixed punch 4 and a sheet metal holder 5 movable in the drawing direction is arranged on a press table 2.
  • the sheet metal holder 5 is supported via pressure pins 6 on a pressure plate 7, which is attached to the upper end of a piston rod 8, to which a piston 9 and a die cushion piston 10 are rigidly attached.
  • the piston 9 is guided in a cylinder 11 fixed to the frame and has an upper active surface which can be acted upon in the direction of drawing.
  • the drawing cushion piston 10 is guided in a drawing cushion cylinder 12 fixed to the frame, in the lower region of which an annular piston 13 surrounding the piston rod 8 is also guided, the movements of which in the drawing direction downward through the end wall of the drawing cushion cylinder 12 and upward through an inner annular collar 14 on the drawing cushion cylinder 12 are limited.
  • a bladder accumulator 15 is connected to the pressure medium space formed under the annular piston 13 in the die cushion cylinder 12.
  • a pressure medium supply 16 via a check valve 17 and a pressure medium discharge line 18 via a pressure relief valve 19 are connected to the pressure medium space formed under the drawing cushion piston 10 in the drawing cushion cylinder 12 above the annular collar 14.
  • a Pressure medium supply and discharge connected via a switchable valve 20.
  • the valve 20 is connected via an operative connection 21 to a ram path-dependent control, which consists of a cam follower 22 and a cam 23, which rotates synchronously with a mechanical drive (not shown in the drawing) for a drawing ram 24.
  • the drawing tappet 24 carries on its underside a drawing ring 25 opposite the sheet metal holder 5 and an ejector 26 opposite the drawing punch 4.
  • a working cycle of the pulling device begins in the - shown in the drawing - initial position, in which a plate 27 rests on the plate holder 5, which is in its highest position, in which it rests against a collar 28 of the lower tool 3 from below.
  • the plunger 24 begins its downward movement.
  • the control causes the active surface on the top of the piston 9 to be pressurized, so that the piston rod 8 with all the parts attached to it and the sheet holder 5 are accelerated in the drawing direction.
  • the sheet metal holder 5 with the sheet metal 27 lying thereon drops so far that the upper sides of the sheet metal holder 5 and the lower tool 3 are at the same height and the sheet metal 27 rests on the punch 4.
  • the tappet 24, which moves faster in the direction of drawing, has reached the top of the plate 27 with the drawing ring 25.
  • the pressure medium enclosed in the pressure medium space under the die cushion piston 10 has also shifted the annular piston 13 by its stroke 29 until it abuts the lower end wall of the die cushion piston 12.
  • the stroke 29 is equal to the extent to which the sheet metal holder 5 projects in its highest position with its upper side above the upper side of the lower tool 3.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)

Abstract

1. Drawing mechanism for presses having a mechanically driven drawing ram (24) and a blank holder (5) whose holding force acting on the blank (27) oppositely to the drawing direction is exerted via a pressure plate (7) with the aid of a drawing cushion piston (10) which supports said pressure plate and is loaded by pressure medium and which is disposed in a stationary drawing cushion cylinder (12), characterized in that a piston (9) having an operative surface adapted to be loaded in the drawing direction is fastened on the pressure plate (7), and that a control means (22, 23) is provided which works in dependence on the travel of the ram and by which the blank holder (5), before the drawing ram (24) contacts it, is adapted to be accelerated into a movement in the drawing direction through the loading of the operative surface with pressure medium.

Description

Die Erfindung bezieht sich auf eine Zieheinrichtung für Pressen mit mechanisch angetriebenem Ziehstößel und mit einem Blechhalter, dessen auf das Blech wirkende, der Ziehrichtung entgegenwirkende Haltekraft über eine Druckplatte mittels eines diese abstützenden, druckmittelbeaufschlagten Ziehkissenkolbens in einem feststehenden Ziehkissenzylinder ausgeübt ist.The invention relates to a drawing device for presses with a mechanically driven ram and with a sheet metal holder, the holding force acting on the sheet metal, counteracting the drawing direction, is exerted via a pressure plate by means of a drawing cushion piston which supports it and is pressurized with pressure medium in a fixed drawing cushion cylinder.

Beim Arbeitshub des Ziehstößels einer derartigen Presse wird zunächst das Blech durch den Ziehring gegen den Ble- hhalter gedrückt und anschließend zusammen mit diesem entgegen der im Ziehkissenzylinder wirkenden Druckkraft verschoben, wobei gleichzeitig das zwischen Blechhalter und Ziehring festgehaltene Blech durch den Ziehstempel des auf dem Pressentisch feststehenden Werkzeuges verformt wird. Der Ziehstößel verschiebt den Blechhalter gegen die auf den Ziehkissenkolben wirkende Druckkraft, wobei der Ziehstößel auch die Massenträgheitskraft, die durch die Beschleunigung der beweglichen Blechhalter- und Ziehkissenmasse hervorgerufen wird, noch überwinden muß. Der Blechhalter, der sich auf dem Ziehkissenkolben abstützt, bildet nämlich ein starres System mit einer großen, zusammenhängenden Masse, welche aus der Ruhe schlagartig auf die Auftreffgeschwindigkeit des Ziehstößels beschleunigt werden muß. Wenn die Blechhalterkraft hydraulisch in dem Ziehkissen erzeugt wird, muß auch noch die Massenträgheitskraft der Druckflüssigkeit bei der Beschleunigung des ruhenden Systems überwunden werden.During the working stroke of the drawing ram of such a press, the sheet metal is first pressed against the sheet holder by the drawing ring and then moved together with the latter against the pressure force acting in the drawing cushion cylinder, the sheet metal held between the sheet holder and drawing ring being simultaneously pulled by the drawing die of the one fixed on the press table Tool is deformed. The drawing plunger moves the sheet metal holder against the pressure force acting on the drawing cushion piston, the drawing plunger also having to overcome the inertia force caused by the acceleration of the movable sheet metal holder and die cushion mass. The sheet metal holder, which is supported on the die cushion piston, namely forms a rigid system with a large, coherent mass, which has to be accelerated suddenly from rest to the speed of impact of the die rod. When the sheet metal holder force is generated hydraulically in the die cushion is, the inertia of the hydraulic fluid must be overcome when accelerating the stationary system.

Bei einer bekannten Zieheinrichtung der eingangs genannten Art (DE-PS 14 52 943) ist zwischen dem Blechhalter und den beweglichen Massen des Ziehkissens ein federndes Glied angeordnet. Dadurch wird die bewegliche Masse des Ziehkissens zeitlich nach der Masse des Blechhalters beschleunigt, so daß sich die Massenkräfte des gesamten Systems nicht addieren. Das federnde Glied bewirkt eine stetige Geschwindigkeitszunahme des Ziehkissenkolbens bis zur Geschwindigkeit des Ziehstößels. Durch diese stetige Geschwindigkeitszunahme des Ziehkissenkolbens wird die wirksame Massenträgheitskraft des Ziehkissenkolbens verringert. Gleichwohl trifft dabei der Ziehstößel mit seiner in diesem Bewegungsbereich gegebenen Geschwindigkeit auf das in Ruhe befindliche, auf dem Blechhalter liegende Blech auf, so daß sich ein ungedämpfter Auftreffschlag ergibt.In a known drawing device of the type mentioned (DE-PS 14 52 943), a resilient member is arranged between the sheet metal holder and the movable masses of the die cushion. As a result, the movable mass of the die cushion is accelerated in time after the mass of the sheet metal holder, so that the inertial forces of the entire system do not add up. The resilient link causes a steady increase in speed of the die cushion piston up to the speed of the die ram. This steady increase in speed of the die cushion piston reduces the effective inertia force of the die cushion piston. At the same time, the plunger hits the sheet at rest, lying on the sheet holder, at its given speed in this range of motion, so that there is an undamped impact.

Aufgabe der Erfindung ist es, bei einer Zieheinrichtung der eingangs genannten Art diesen Auftreffschlag zu vermeiden oder zumindest zu vermindern.The object of the invention is to avoid or at least reduce this impact impact in a pulling device of the type mentioned at the outset.

Diese Aufgabe ist erfindungsgemäß dadurch gelöst, daß an der Druckplatte ein Kolben mit in Ziehrichtung beaufschlagbarer Wirkfläche befestigt ist, und daß eine stößelwegabhängig arbeitende Steuerung vorgesehen ist, durch die vor dem Aufsetzen des Ziehstößels auf den Blechhalter dieser durch Beaufschlagung der Wirkfläche mit Druckmittel auf eine Bewegung in Ziehrichtung beschleunigbar ist.This object is achieved in that a piston is attached to the pressure surface acting in the direction of drawing, and that a ram path-dependent control is provided, by which the plunger is placed on the sheet metal holder by pressing the active surface with pressure medium on a movement can be accelerated in the direction of pull.

Infolge dieser Maßnahmen befindet sich der Blechhalter mit dem darauf liegenden Blech bereits in Bewegung in Ziehrichtung, wenn der Ziehstößel auf das Blech auftrifft; die Relativgeschwindigkeit zwischen Ziehstößel und Blech ist damit geringer als bei einem Auftreffen auf das stillstehende Blech. Der Auftreffschlag wird dadurch gemildert oder ganz vermieden.As a result of these measures, the sheet metal holder with the sheet metal lying thereon is already moving in the direction of drawing when the drawing ram strikes the sheet metal; the relative speed between the ram and the sheet is therefore lower than when it hits the stationary sheet. The impact impact is thereby mitigated or avoided entirely.

Ein besonders einfacher, konstruktiver Aufbau der Zieheinrichtung ergibt sich dabei, wenn die Wirkfläche an dem Ziehkissenkolben gebildet ist.A particularly simple, constructive structure of the drawing device is obtained if the active surface on the drawing cushion piston is ge forms is.

Eine besonders feinfühlige Anpassung der Bewegung des Blechhalters an die Bewegung des Ziehstößels läßt sich dadurch erreichen, daß die Steuerung die Beaufschlagung der Wirkfläche mit Druckmittel über ein Proportior..lventil beeinflußt.A particularly sensitive adjustment of the movement of the sheet metal holder to the movement of the drawing ram can be achieved in that the control influences the application of pressure medium to the active surface via a proportional oil valve.

Zweckmäßigerweise ist die Bewegung des Blechhalters in Ziehrichtung auf eine Geschwindigkeit beschleunigbar, die gleich der oder wenig kleiner als die Geschwindigkeit des Ziehstößels bei dem Aufsetzen auf den Blechhalter ist.The movement of the sheet metal holder in the drawing direction can expediently be accelerated to a speed which is equal to or slightly less than the speed of the drawing ram when it is placed on the sheet metal holder.

In der Zeichnung ist als Ausführungsbeispiel für die Erfindung eine Zieheinrichtung in einem Vertikalschnitt dargestellt.In the drawing, a pulling device is shown in a vertical section as an exemplary embodiment of the invention.

In einem Untergestell 1 einer - im übrigen in der Zeichnung nicht näher dargestellten - Presse ist auf einem Pressentisch 2 ein Unterwerkzeug 3 mit einem feststehenden Ziehstempel 4 und einem in Ziehrichtung beweglichen Blechhalter 5 angeordnet. Der Blechhalter 5 ist über Druckstifte 6 auf einer Druckplatte 7 abgestützt, die an dem oberen Ende einer Kolbenstange 8 angebracht ist, an der ein Kolben 9 und ein Ziehkissenkolben 10 starr befestigt sind. Der Kolben 9 ist in einem gestellfesten Zylinder 11 geführt und weist eine obere, in Ziehrichtung beaufschlagbare Wirkfläche auf. Der Ziehkissenkolben 10 ist in einem gestellfesten Ziehkissenzylinder 12 geführt, in dessen unterem Bereich zusätzlich ein die Kolbenstange 8 umschließender Ringkolben 13 geführt ist, dessen Bewegungen in Ziehrichtung nach unten durch die Stirnwand des Ziehkissenzylinders 12 und nach oben durch einen inneren Ringbund 14 an dem Ziehkissenzylinder 12 begrenzt sind.In a base frame 1 of a press, which is not shown in the drawing, a lower tool 3 with a fixed punch 4 and a sheet metal holder 5 movable in the drawing direction is arranged on a press table 2. The sheet metal holder 5 is supported via pressure pins 6 on a pressure plate 7, which is attached to the upper end of a piston rod 8, to which a piston 9 and a die cushion piston 10 are rigidly attached. The piston 9 is guided in a cylinder 11 fixed to the frame and has an upper active surface which can be acted upon in the direction of drawing. The drawing cushion piston 10 is guided in a drawing cushion cylinder 12 fixed to the frame, in the lower region of which an annular piston 13 surrounding the piston rod 8 is also guided, the movements of which in the drawing direction downward through the end wall of the drawing cushion cylinder 12 and upward through an inner annular collar 14 on the drawing cushion cylinder 12 are limited.

An den unter dem Ringkolben 13 in dem Ziehkissenzylinder 12 gebildeten Druckmittelraum ist ein Blasenspeicher 15 angeschlossen. An den unter dem Ziehkissenkolben 10 in dem Ziehkissenzylinder 12 über dem Ringbund 14 gebildeten Druckmittelraum sind eine Druckmittelzuführung 16 über ein Rückschlagventil 17 und eine Druckmittelableitung 18 über ein Druckbegrenzungsventil 19 angeschlossen. An den in dem Zylinder 11 über dem Kolben 9 gebildeten Druckmittelraum ist eine Druckmittelzu- und -abführung über ein schaltbares Ventil 20 angeschlossen. Das Ventil 20 ist über eine Wirkverbindung 21 an eine stößelwegabhängige Steuerung angeschlossen, die aus einem Nockenfolger 22 und einem Nocken 23 besteht, der synchron mit einem - in der Zeichnung nicht dargestellten - mechanischen Antrieb für einen Ziehstößel 24 umläuft. Der Ziehstößel 24 trägt auf seiner Unterseite einen dem Blechhalter 5 gegenüberliegenden Ziehring 25 und einen dem Ziehstempel 4 gegenüberliegenden Auswerfer 26.A bladder accumulator 15 is connected to the pressure medium space formed under the annular piston 13 in the die cushion cylinder 12. A pressure medium supply 16 via a check valve 17 and a pressure medium discharge line 18 via a pressure relief valve 19 are connected to the pressure medium space formed under the drawing cushion piston 10 in the drawing cushion cylinder 12 above the annular collar 14. At the pressure medium space formed in the cylinder 11 above the piston 9 is a Pressure medium supply and discharge connected via a switchable valve 20. The valve 20 is connected via an operative connection 21 to a ram path-dependent control, which consists of a cam follower 22 and a cam 23, which rotates synchronously with a mechanical drive (not shown in the drawing) for a drawing ram 24. The drawing tappet 24 carries on its underside a drawing ring 25 opposite the sheet metal holder 5 and an ejector 26 opposite the drawing punch 4.

Ein Arbeitszyklus der Zieheinrichtung beginnt in der - in der Zeichnung dargestellten - Anfangsstellung,bei der ein Blech 27 auf dem Blechhalter 5 aufliegt, der sich in seiner höchsten Lage befindet, in der er von unten an einem Bund 28 des Unterwerkzeuges 3 anliegt. Der Ziehstößel 24 beginnt seine Bewegung nach unten. Vor dem Auftreffen des Ziehringes 25 auf das Blech 27 bewirkt die Steuerung eine Beaufschlagung der Wirkfläche auf der Oberseite des Kolbens 9 mit Druckmittel, so daß die Kolbenstange 8 mit allen daran befestigten Teilen und der Blechhalter 5 in Ziehrichtung beschleunigt werden. Während dieser Beschleunigung sinkt der Blechhalter 5 mit dem darauf liegenden Blech 27 so weit ab, daß die Oberseiten des Blechhalters 5 und des Unterwerkzeuges 3 auf gleicher Höhe liegen und das Blech 27 auf dem Ziehstempel 4 aufliegt. Bis dahin hat auch der sich schneller in Ziehrichtung bewegende Ziehstößel 24 mit dem Ziehring 25 die Oberseite desBleches 27 erreicht. Während der Beschleunigung hat außerdem das in dem Druckmittelraum unter dem Ziehkissenkolben 10 eingeschlossene Druckmittel den Ringkolben 13 um dessen Hub 29 bis zur Anlage an der unteren Stirnwand des Ziehkissenkolbens 12 verschoben. Der Hub 29 ist gleich dem Maß, um das der Blechhalter 5 in seiner höchsten Lage mit seiner Oberseite über die Oberseite des Unterwerkzeuges 3 vorragt. Mit dem Aufsetzen des Ziehringes 25 auf das Blech 27 und dem Anlaufen des Ringkolbens 13 an der unteren Stirnwand des Ziehkissenzylinders 12 beginnt die Zieheinrichtung in üblicher Weise als hydraulische Zieheinrichtung zu arbeiten. Nach beendetem Ziehhub kehrt die Zieheinrichtung in die - in der Zeichnung dargestellte - Anfangsstellung zurück.A working cycle of the pulling device begins in the - shown in the drawing - initial position, in which a plate 27 rests on the plate holder 5, which is in its highest position, in which it rests against a collar 28 of the lower tool 3 from below. The plunger 24 begins its downward movement. Before the impact of the drawing ring 25 on the sheet 27, the control causes the active surface on the top of the piston 9 to be pressurized, so that the piston rod 8 with all the parts attached to it and the sheet holder 5 are accelerated in the drawing direction. During this acceleration, the sheet metal holder 5 with the sheet metal 27 lying thereon drops so far that the upper sides of the sheet metal holder 5 and the lower tool 3 are at the same height and the sheet metal 27 rests on the punch 4. In the meantime, the tappet 24, which moves faster in the direction of drawing, has reached the top of the plate 27 with the drawing ring 25. During the acceleration, the pressure medium enclosed in the pressure medium space under the die cushion piston 10 has also shifted the annular piston 13 by its stroke 29 until it abuts the lower end wall of the die cushion piston 12. The stroke 29 is equal to the extent to which the sheet metal holder 5 projects in its highest position with its upper side above the upper side of the lower tool 3. When the drawing ring 25 is placed on the sheet metal 27 and the ring piston 13 starts to run on the lower end wall of the drawing cushion cylinder 12, the drawing device begins to operate in the usual manner as a hydraulic drawing device. After the drawing stroke has ended, the drawing device returns to the starting position shown in the drawing.

Claims (4)

1. Zieheinrichtung für Pressen mit mechanisch angetriebenem Ziehstößel (24) und mit einem Blechhalter (5), dessen auf das Blech (27) wirkende, der Ziehrichtung entgegenwirkende Haltekraft über eine Druckplatte (7) mittels eines diese abstützenden, druckmittelbeaufschlagten Ziehkissenkolbens (10) in einem feststehenden Ziehkissenzylinder (12) ausgeübt ist, dadurch gekennzeichnet, daß an der Druckplatte (7) ein Kolben (9) mit in Ziehrichtung beaufschlagbarer Wirkfläche befestigt ist, und daß eine stößelwegabhängig arbeitende Steuerung (22, 23) vorgesehen ist, durch die vor dem Aufsetzen des Ziehstößels (24) auf den Blechhalter (5) dieser durch Beaufschlagung der Wirkfläche mit Druckmittel auf eine Bewegung in Ziehrichtung beschleunigbar ist.1.Drawing device for presses with a mechanically driven ram (24) and with a sheet metal holder (5), the holding force acting on the sheet metal (27) and counteracting the drawing direction via a pressure plate (7) by means of a drawing cushion piston (10) supporting it and pressurized with pressure medium a fixed drawing cushion cylinder (12) is exercised, characterized in that a piston (9) with an effective surface which can be acted upon in the direction of drawing is fastened to the pressure plate (7), and that a control (22, 23) operating as a function of the ram travel is provided, by means of which the Placing the ram (24) on the sheet metal holder (5) which can be accelerated by moving the active surface with pressure medium to move in the direction of drawing. 2. Zieheinrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Wirkfläche an dem Ziehkissenkolben (10) in dem Ziehkissenzylinder (12) gebildet ist.2. Drawing device according to claim 1, characterized in that the active surface on the die cushion piston (10) is formed in the die cushion cylinder (12). 3. Zieheinrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Steuerung (22, 23) die Beaufschlagung der Wirkfläche mit Druckmittel über ein Proportionalventil beeinflußt.3. Drawing device according to claim 1 or 2, characterized in that the control (22, 23) influences the application of the active surface with pressure medium via a proportional valve. 4. Zieheinrichtung nach Anspruch 1, 2 oder 3, dadurch gekennzeichnet, daß die Bewegung des Blechhalters (5) in Ziehrichtung auf eine Geschwindigkeit beschleunigbar ist, die gleich der oder wenig kleiner als die Geschwindigkeit des Ziehstößels (24) bei dem Aufsetzen auf den Blechhalter (5) ist.4. Drawing device according to claim 1, 2 or 3, characterized in that the movement of the sheet metal holder (5) in the drawing direction can be accelerated to a speed which is equal to or slightly less than the speed of the drawing plunger (24) when placed on the sheet metal holder (5) is.
EP81107203A 1981-09-12 1981-09-12 Deep-drawing arrangement for presses with mechanically driven drawing punch Expired EP0074421B1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
DE8181107203T DE3170614D1 (en) 1981-09-12 1981-09-12 Deep-drawing arrangement for presses with mechanically driven drawing punch
EP81107203A EP0074421B1 (en) 1981-09-12 1981-09-12 Deep-drawing arrangement for presses with mechanically driven drawing punch
BR8207859A BR8207859A (en) 1981-09-12 1982-09-07 BUILT-IN INSTALLATION FOR PRESSES WITH MECHANICALLY ACTIVATED BUILT-IN PUNCH HOLDER
US06/525,906 US4499750A (en) 1981-09-12 1982-09-07 Drawing device for presses with mechanically driven drawing ram
JP57502797A JPS58501419A (en) 1981-09-12 1982-09-07 Press drawing device with mechanically driven punches
PCT/DE1982/000181 WO1983000821A1 (en) 1981-09-12 1982-09-07 Drawing device for presses, provided with a mechanically operated punch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP81107203A EP0074421B1 (en) 1981-09-12 1981-09-12 Deep-drawing arrangement for presses with mechanically driven drawing punch

Publications (2)

Publication Number Publication Date
EP0074421A1 true EP0074421A1 (en) 1983-03-23
EP0074421B1 EP0074421B1 (en) 1985-05-22

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ID=8187905

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81107203A Expired EP0074421B1 (en) 1981-09-12 1981-09-12 Deep-drawing arrangement for presses with mechanically driven drawing punch

Country Status (6)

Country Link
US (1) US4499750A (en)
EP (1) EP0074421B1 (en)
JP (1) JPS58501419A (en)
BR (1) BR8207859A (en)
DE (1) DE3170614D1 (en)
WO (1) WO1983000821A1 (en)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3619109A1 (en) * 1985-10-30 1987-05-07 Warnke Umformtech Veb K Device for impact damping for drawing cushions on presses
EP0268894A2 (en) * 1986-11-28 1988-06-01 L. SCHULER GmbH Drawing device for a press
EP0268893A2 (en) * 1986-11-28 1988-06-01 L. SCHULER GmbH Drawing device for a press
GB2197813A (en) * 1986-11-27 1988-06-02 Mueller Weingarten Maschf Controlling or adjusting blank holder force during a drawing process
DE3737967A1 (en) * 1987-11-07 1989-05-18 Mueller Weingarten Maschf Pneumatic drawing device for presses with controlled shock damping between the pressure cheek and the pressure cylinder of the drawing device
EP0417753A2 (en) * 1989-09-12 1991-03-20 Maschinenfabrik Müller-Weingarten AG Mechanical or hydraulic press with drawing or pressing station for multiple stage press
US5138857A (en) * 1990-04-23 1992-08-18 Maschinenfabrik Mueller-Weingarten Ag Drawing device in a press for drawing shaped sheet-metal parts
US5255552A (en) * 1991-02-12 1993-10-26 Maschinenfabrik J. Dieffenbacher Gmbh & Co. Hydroelastic deep-drawing apparatus
EP0956913A1 (en) * 1998-05-11 1999-11-17 Umix Co., Ltd. Noise reducing device for a drawing die and run-up unit for the blank holder
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EP0417753A3 (en) * 1989-09-12 1991-06-05 Maschinenfabrik Mueller-Weingarten Ag Mechanical or hydraulic press with drawing or pressing station for multiple stage press
US5138857A (en) * 1990-04-23 1992-08-18 Maschinenfabrik Mueller-Weingarten Ag Drawing device in a press for drawing shaped sheet-metal parts
US5255552A (en) * 1991-02-12 1993-10-26 Maschinenfabrik J. Dieffenbacher Gmbh & Co. Hydroelastic deep-drawing apparatus
EP0956913A1 (en) * 1998-05-11 1999-11-17 Umix Co., Ltd. Noise reducing device for a drawing die and run-up unit for the blank holder
EP1034858A2 (en) * 1999-03-09 2000-09-13 Umix Co., Ltd. Silent structure of processing machine, silent structure of pressing machine, silent structure of drawing die, and silent run-up unit thereof
EP1034858A3 (en) * 1999-03-09 2002-04-17 Umix Co., Ltd. Silent structure of processing machine, silent structure of pressing machine, silent structure of drawing die, and silent run-up unit thereof
EP2335840A3 (en) * 2009-12-15 2014-12-31 Robert Bosch GmbH Hydraulic press drive
US9038431B2 (en) 2010-05-03 2015-05-26 Schuler Pressen Gmbh & Co. Kg Hydraulic cylinder for a hydraulic drawing cushion
DE102010019324B4 (en) * 2010-05-03 2015-05-07 Schuler Pressen Gmbh Hydraulic drawing cushion
DE102010019324A1 (en) * 2010-05-03 2011-11-03 Schuler Pressen Gmbh & Co. Kg Hydraulic cylinder for a hydraulic drawing cushion
EP2384834A3 (en) * 2010-05-03 2015-10-21 Schuler Pressen GmbH & Co. KG Hydraulic cylinder for a hydraulic die cushion
WO2017072173A1 (en) * 2015-10-29 2017-05-04 Hatebur Umformmaschinen Ag Actuator device
CH711715A1 (en) * 2015-10-29 2017-05-15 Hatebur Umformmaschinen Ag Actuator.
EA034846B1 (en) * 2015-10-29 2020-03-27 Хатебур Умформмашинен Аг Actuator device
US10786845B2 (en) 2015-10-29 2020-09-29 Hatebur Umformmaschinen Ag Actuator device
DE102015016773A1 (en) 2015-12-23 2017-06-29 Wieland Petter Process for working and shaping metallic and other materials

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DE3170614D1 (en) 1985-06-27
JPH0422649B2 (en) 1992-04-20
JPS58501419A (en) 1983-08-25
BR8207859A (en) 1983-08-30
WO1983000821A1 (en) 1983-03-17
US4499750A (en) 1985-02-19
EP0074421B1 (en) 1985-05-22

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