EP0402800A1 - Pressure cheek in the drawing apparatus of a press - Google Patents

Pressure cheek in the drawing apparatus of a press Download PDF

Info

Publication number
EP0402800A1
EP0402800A1 EP90110929A EP90110929A EP0402800A1 EP 0402800 A1 EP0402800 A1 EP 0402800A1 EP 90110929 A EP90110929 A EP 90110929A EP 90110929 A EP90110929 A EP 90110929A EP 0402800 A1 EP0402800 A1 EP 0402800A1
Authority
EP
European Patent Office
Prior art keywords
pressure
segments
drawing apparatus
cheek
sheet metal
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
EP90110929A
Other languages
German (de)
French (fr)
Other versions
EP0402800B1 (en
Inventor
Siegfried Baur
Rudi Brandstetter
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
Original Assignee
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
Publication of EP0402800A1 publication Critical patent/EP0402800A1/en
Application granted granted Critical
Publication of EP0402800B1 publication Critical patent/EP0402800B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • B21D24/02—Die-cushions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/06—Platens or press rams
    • B30B15/068—Drive connections, e.g. pivotal

Definitions

  • the invention relates to drawing apparatus of the type specified in the preamble of claim 1 and in particular to the pressure cheeks used in these.
  • the pressure cheek of a drawing device transmits the force to be applied by the pressure cylinders to the sheet metal holder as a counterforce to the drawing process and the force and movement to eject the workpieces from the drawing tool.
  • the pressure cylinders can be individually adjusted to different initial pressures and the pressures during the drawing process.
  • the sheet metal holders of the tools are rigid structures in themselves, as are the pressure cheeks in the drawing apparatus, so that the difference between the discretely set pressures and pressure profiles in the pressure cylinders has only a limited effect on the workpiece or its edge areas.
  • a press table is known from DE-PS 951 146, which has three pressure cheeks. Each of the pressure cheeks interacts with a single compressed air cylinder. The pressure cheeks can be clamped together to form a rigid structure by means of displaceable mechanical bolts. In addition, for the pressure cheeks to synchronize, it is necessary to interconnect the compressed air cylinders. A discrete control / regulation of the movement and pressure curve of the individual pressure cheeks is then not possible.
  • each of the segments of the pressure cheek is thus sensitive to the requirements of drawing in partial (edge) areas of the workpiece or several workpieces to be molded simultaneously.
  • the features of claim 2 provide a wide range of connection options between the segments of the pressure cheek with high adaptation to the conditions of the drawing operation.
  • a proven component is used for the connection between the segments of the pressure cheek. The location of these components, as well as the large number of pressure cylinders required, is previously unimaginable.
  • the number of printing cylinders can in turn be reduced, the drawing conditions in the respective pressure point and in the adjacent areas nevertheless being taken into account. It is assumed here that the drawing conditions in adjacent areas to the pressure point can be regarded as at least almost the same.
  • the item number 2 indicates a sliding table that can be moved into and out of the press.
  • the sliding table carries a tool, indicated with 19, a tool set or several individual tools.
  • the tools have sheet metal holders with which pressure bolts 4 guided in the perforated plate 16 of the sliding table interact. All pressure bolts are set.
  • the push pins are held for changing the sliding table by a thin-walled pin plate 3 from below in the sliding table.
  • the drawing apparatus is essentially formed by pressure cylinder 9 for drawing and possibly a pressure cylinder 10 for ejection, the pressure cylinders being held on the base plate 14, furthermore by guided pressure rods 8 and a pressure cheek 5 which can be raised and lowered.
  • the pressure cheek is divided into individual ones Segments 6, here in three segments.
  • the push rods are by means of balls or the like.
  • Joints 13 placed against the segments from below. The segments have shoulders, as a result of which protruding stops 11 are formed on the outer (outer) segments, which corresponding assumptions in the internal (inner) segents grip in a way that encompasses the inner segment.
  • Fig. 2 shows the pressure attack of the pressure cylinder 9 in the corner regions 7 of the segments 6. At 20, guide means for the inner segment or segments are indicated.
  • an assignment of the perforated plate 16 with pressure pin 4 according to FIG. 5 may be appropriate.
  • the figures 6 to 9 serve to compare the invention and the prior art.
  • 6 shows three pressure cheeks 5 according to DE-PS 951 146 mentioned at the beginning. Each of the pressure cheeks can be acted upon by a pressure cylinder (arrow 18). The pressure cheeks can be connected to one another to form a rigid structure by means of locking bolts 17.
  • FIG. 7 has a pressure cheek 5 with three, or as indicated here, a plurality of segments 6. Each of the segments can be acted upon independently of one another by pressure cylinders (arrow 18). The pressure cylinders act on the segments in the corner regions, as has been shown in FIG. 2.
  • the figures 8 and 9 show configurations according to FIGS. 1 to 5 with differently arranged, protruding stops 11.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)

Abstract

The pressure cheek (5) of the drawing apparatus of a press (1) is divided into (individual) segments (6). In the corner regions, the segments are acted upon by pressure cylinders by means of pressure rods (8). The segments reach one under the other. The projecting stops (11) provided for this purpose bear ball-and-socket joints (12) for supporting the inner segments. By this means it is possible to transmit the possibilities of the pressure control, acting before, during and after the drawing phase, in the pressure cylinders fully to the blank holders in the tools, irrespective of the number and size of the tools used. <IMAGE>

Description

Die Erfindung betrifft Ziehapparate der im Oberbegriff von An­spruch 1 angegebenen Art und insbesondere die in diesen eingesetzten Druckwangen.The invention relates to drawing apparatus of the type specified in the preamble of claim 1 and in particular to the pressure cheeks used in these.

Die Druckwange eines Ziehapparats überträgt die von den Druckzy­lindern aufzubringende Kraft auf den Blechhalter als Gegenkraft zum Ziehvorgang und die Kraft und Bewegung zum Auswerfen der Werkstücke aus dem Zieh-Werkzeug heraus. Zur Vermeidung von Rissen in den Werk­stücken bei zu hoher Blechhalterkraft und von Faltenbildung bei zu ge­ringer Blechhalterkraft während des Ziehens sind die Druckzylinder auf unterschiedliche Anfangsdrücke und die Drücke während des Ziehvor­gangs einzeln nachregelbar.The pressure cheek of a drawing device transmits the force to be applied by the pressure cylinders to the sheet metal holder as a counterforce to the drawing process and the force and movement to eject the workpieces from the drawing tool. In order to avoid cracks in the workpieces when the sheet metal holder force is too high and wrinkle formation when the sheet metal holder force is too low during the drawing, the pressure cylinders can be individually adjusted to different initial pressures and the pressures during the drawing process.

Die Blechhalter der Werkzeuge sind in sich starre Gebilde, ebenso die Druckwangen in den Ziehapparaten, so daß sich die Differenz der diskret eingestellten Drücke und Druckverläufe in den Druckzylindern nur bedingt auf das Werkstück bzw. deren Randbereiche auswirken.The sheet metal holders of the tools are rigid structures in themselves, as are the pressure cheeks in the drawing apparatus, so that the difference between the discretely set pressures and pressure profiles in the pressure cylinders has only a limited effect on the workpiece or its edge areas.

In unserer nicht vorveröffentlichten Deutschen Patentanmeldung, Aktenzeichen P 38 07 683.7, von der gattungsgemäß ausgegangen wird, ist ein Ziehapparat in Ziehstufen einer Presse beschrieben worden für Ziehteile (Werkstücke) von unten haltende Blechhalter. Die Blechhal­ter sind von einer Druckwange des Ziehapparats beaufschlagbar, deren Bewegungen und momentane Gegenhaltekraft in Druckzylindern gesteuert bzw. geregelt wird. Die Patentanmeldung beschreibt weiterhin Drucksteuer-Druckregelmittel für die Beaufschlagung der Druckzylinder in der dem Ziehvorgang vorausgehenden Phase, in der Phase des Ziehvor­gangs und in der dem Ziehvorgang nachfolgenden Phase. Zur Abstützung des Blechhalters in diskreten Punkten ist die Druckwange in einzelne Seggente unterteilt, die unabhängig voneinander durch jeweils einen Druckzylinder beaufschlagbar sind.In our unpublished German patent application, file number P 38 07 683.7, from which it is generally assumed, a drawing apparatus in drawing stages of a press has been described for sheet metal holders holding parts (workpieces) from below. The sheet metal holders can be acted upon by a pressure cheek of the drawing apparatus, the movements and momentary counterforce of which are controlled or regulated in pressure cylinders. The patent application further describes pressure control pressure regulating means for the application of pressure cylinders in the phase preceding the drawing process, in the phase of the drawing process and in the phase following the drawing process. For support of the sheet metal holder in discrete points, the pressure cheek is divided into individual segments, which can be acted upon independently by a pressure cylinder.

Demgegenüber ist aus der DE-PS 951 146 ein Pressentisch bekannt, der drei Druckwangen aufweist. Jede der Druckwangen wirkt mit einem einzigen Druckluftzylinder zusammen. Die Druckwangen sind untereinan­der durch verschiebbare mechanische Riegel verspannbar zu einem in sich starren Gebilde. Zudem ist es für einen Gleichlauf der Druckwan­gen erforderlich, die Druckluftzylinder zusammenzuschalten. Eine dis­krete Steuerung/Regelung des Bewegungs- und Druckverlaufs der einzel­nen Druckwangen ist dann nicht möglich.In contrast, a press table is known from DE-PS 951 146, which has three pressure cheeks. Each of the pressure cheeks interacts with a single compressed air cylinder. The pressure cheeks can be clamped together to form a rigid structure by means of displaceable mechanical bolts. In addition, for the pressure cheeks to synchronize, it is necessary to interconnect the compressed air cylinders. A discrete control / regulation of the movement and pressure curve of the individual pressure cheeks is then not possible.

Es ist Aufgabe der Erfindung, unabhängig von der Anzahl und Größe der auf dem Ziehapparat aufliegenden Werkzeuge bzw. Werkzeugsätze, die Möglichkeiten der vor, während und nach der Ziehphase wirkenden Druck-Steuerung bzw. Druckregelung in den Druckzylindern voll auf den Blechhalter und somit auf das Werkstück zu übertragen.It is an object of the invention, regardless of the number and size of the tools or tool sets lying on the drawing apparatus, the possibilities of the pressure control or pressure regulation acting before, during and after the drawing phase in the pressure cylinders fully on the sheet metal holder and thus on the Transfer workpiece.

Die Aufgabe ist nach der Erfindung gelöst durch die den Anspruch 1 kennzeichnenden Merkmale. Jedes der Segmente der Druckwange ist so­mit feinfühlig auf die Erfordernisse des Ziehens in Teil- (Rand-) be­reichen des Werkstücks bzw. mehrerer gleichzeitig zu formender Werk­stücke einstellbar.The object is achieved according to the invention by the features characterizing claim 1. Each of the segments of the pressure cheek is thus sensitive to the requirements of drawing in partial (edge) areas of the workpiece or several workpieces to be molded simultaneously.

Durch die Merkmale nach Anspruch 2 sind vielgestaltige Verbin­dungsmöglichkeiten zwischen den Segmenten der Druckwange gegeben bei hoher Anpassung an die Bedingungen des Ziehbetriebs.The features of claim 2 provide a wide range of connection options between the segments of the pressure cheek with high adaptation to the conditions of the drawing operation.

Entsprechend einer Ausführungsform nach Anspruch 3 wird für die Verbindung zwischen den Segmenten der Druckwange auf ein bewährtes Bauteil zurückgegriffen. Bisher unvorstellbar ist der Einsatzort die­ser Bauteile wie auch die Vielzahl an erforderlichen Druckzylindern.According to an embodiment according to claim 3, a proven component is used for the connection between the segments of the pressure cheek. The location of these components, as well as the large number of pressure cylinders required, is previously unimaginable.

Mit der Maßnahme entsprechend der Merkmale nach dem Anspruch 4 kann wiederum die Anzahl an Druckzylindern verringert werden, wobei trotzdem die Ziehverhältnisse in dem jeweiligen Druckpunkt und in den angrenzenden Bereichen berücksichtigt werden. Hierbei wird davon aus­gegangen, daß die Ziehverhältnisse in benachbarten Bereichen zu dem Druckpunkt als zumindest nahezu gleich angesehen werden können.With the measure according to the features according to claim 4, the number of printing cylinders can in turn be reduced, the drawing conditions in the respective pressure point and in the adjacent areas nevertheless being taken into account. It is assumed here that the drawing conditions in adjacent areas to the pressure point can be regarded as at least almost the same.

Anhand eines Ausführungsbeispiels in den Figuren soll im folgen­den die Erfindung näher erläutert werden.The invention will be explained in more detail below using an exemplary embodiment in the figures.

Es zeigen:

  • Fig. 1 einen Ziehapparat mit einer in Segmente geteilten Druckwange in einer Schnittdarstellung nach dem Schnittverlauf I-I in Fig. 2,
  • Fig. 2 den Ziehapparat mit einem auf diesen verfahrenen
  • Schiebetisch in einer Draufsicht,
  • Fig. 3 eine vergrößerte Darstellung des in Fig. 1 mit
  • III angedeuteten Bereichs,
  • Fign. 4 u. 5 jeweils den oberen Bereich des Ziehapparats gemäß Fig. 1 zur DarstelLung unterschiedlicher Belegun­gen der Lochplatte des Schiebetisches,
  • Fig. 6 eine vereinfachte Darstellung von Druckwangen be­kannter Art und
  • Fign. 7 bis 9 einige von verschiedenen möglichen Ausgestaltungs­formen der Segmente der Druckwange eines Ziehappa­rats nach der Erfindung.
Show it:
  • 1 shows a drawing apparatus with a pressure cheek divided into segments in a sectional view according to the section line II in FIG. 2,
  • Fig. 2 shows the drawing apparatus with one moved on it
  • Sliding table in a top view,
  • Fig. 3 is an enlarged view of the in Fig. 1 with
  • III indicated area,
  • Fig. 4 u. 5 each the upper region of the drawing apparatus according to FIG. 1 for the representation of different assignments of the perforated plate of the sliding table,
  • Fig. 6 is a simplified representation of pressure cheeks of known type and
  • Fig. 7 to 9 show some of the different possible configurations of the segments of the pressure cheek of a drawing apparatus according to the invention.

Der Ziehapparat in Fig. 1 ist in dem Pressentisch 1 vermittels ei­ner Grundplatte 14 gehalten. Mit der Positionsziffer 2 wird auf einen Schiebetisch hingewiesen, der in die Presse und aus dieser heraus ver­fahrbar ist. Der Schiebetisch trägt ein mit 19 angedeutetes Werkzeug, einen Werkzeugsatz oder mehrere Einzel-Werkzeuge. Die Werkzeuge wei­sen Blechhalter auf, mit denen in der Lochplatte 16 des Schiebe­tisches geführte Druckbolzen 4 zusammenwirken. Es sind alle Druckbol­zen gesetzt. Die Druckbolzen sind für den Schiebetischwechsel durch eine dünnwandige Stiftplatte 3 von unten in dem Schiebetisch gehal­ten.1 is held in the press table 1 by means of a base plate 14. The item number 2 indicates a sliding table that can be moved into and out of the press. The sliding table carries a tool, indicated with 19, a tool set or several individual tools. The tools have sheet metal holders with which pressure bolts 4 guided in the perforated plate 16 of the sliding table interact. All pressure bolts are set. The push pins are held for changing the sliding table by a thin-walled pin plate 3 from below in the sliding table.

Der Ziehapparat wird im wesentlichen gebildet durch Druckzylinder 9 zum Ziehen und ggf. einen Druckzylinder 10 zum Auswerfen, wobei die Druckzylinder an der Grundplatte 14 gehalten sind, weiterhin durch ge­führte Druckstangen 8 und eine heb- und senkbare Druckwange 5. Die Druckwange ist unterteilt in einzelne Segmente 6, hier in drei Segmen­te. Die Druckstangen sind vermittels Kugel- o.dgl. Gelenke 13 von un­ten gegen die Segmente gelegt. Die Segmente weisen Absätze auf, wo­durch an den außen befindlichen (äußeren) Segeenten überstehende An­schlage 11 gebildet sind, die in dementsprechende Ansnehmungen in dem innen befindlichen (inneren) Seggent greifen in einer das innere Seg­ment untergreifenden Weise.The drawing apparatus is essentially formed by pressure cylinder 9 for drawing and possibly a pressure cylinder 10 for ejection, the pressure cylinders being held on the base plate 14, furthermore by guided pressure rods 8 and a pressure cheek 5 which can be raised and lowered. The pressure cheek is divided into individual ones Segments 6, here in three segments. The push rods are by means of balls or the like. Joints 13 placed against the segments from below. The segments have shoulders, as a result of which protruding stops 11 are formed on the outer (outer) segments, which corresponding assumptions in the internal (inner) segents grip in a way that encompasses the inner segment.

Entsprechend Fig. 3 sind zwischen den Anschlägen 11 an den beiden äußeren der Segmente 6 und jeweils einer den Anschlägen gegenüber be­findlichen Anlagefäche 15 an dem inneren Segment Kugel- o.dgl. Gelen­ke 12 eingesetzt, um so z.B. das innere Segment durch den Auswerferzy­linder anheben zu können. Wesentlich ist hierbei der Einfluß auf die Federsteifigkeit (Umgehung) durch die Mehrgliedrigkeit der Druckwan­ge.According to FIG. 3, between the stops 11 on the two outer segments 6 and one contact surface 15 located opposite the stops on the inner segment ball or the like. Joints 12 used, e.g. to be able to lift the inner segment through the ejector cylinder. What is important here is the influence on the spring stiffness (bypassing) due to the multiple links of the pressure cheek.

Fig. 2 läßt den Druckangriff der Druckzylinder 9 in den Eckbe­reichen 7 der Segmente 6 erkennen. Mit 20 sind Führungsmittel für das bzw. die inneren Segmente angedeutet.Fig. 2 shows the pressure attack of the pressure cylinder 9 in the corner regions 7 of the segments 6. At 20, guide means for the inner segment or segments are indicated.

Entsprechend der Gestaltung eines Werkzeugs kann es sinnvoll sein, nach Fig. 4 nur Druckbolzen 4 oberhalb des inneren Segments 6 zu setzen. Hierbei werden die vier, über die äußeren Segmente an dem inneren Segment angreifenden Druckzylinder gesteuert. Die außen lie­genden und an den äußeren Segmenten angreifenden Druckzylinder werden im Sinne eines parallelen Hochlaufens und Absenkens der äußeren Seg­mente angesteuert.According to the design of a tool, it can be useful to set only pressure bolts 4 above the inner segment 6 according to FIG. 4. Here, the four pressure cylinders acting on the inner segment via the outer segments are controlled. The pressure cylinders located on the outside and acting on the outer segments are actuated in the sense of a parallel raising and lowering of the outer segments.

Entsprechend der Gestaltung eines Werkzeugs, eines Werkzeugsatzes oder z.B. zweier Werkzeuge fuhr beispielsweise eine linke und eine da­zu spiegelgleiche rechte Seitentür kann eine Belegung der Lochplatte 16 mit Druckbolzen 4 nach Fig. 5 zweckmäßig sein.According to the design of a tool, a tool set or e.g. two tools drove, for example, a left and a mirror-like right side door, an assignment of the perforated plate 16 with pressure pin 4 according to FIG. 5 may be appropriate.

Die Fign. 6 bis 9 dienen dem Vergleich zwischen der Erfindung und dem Stand der Technik. Fig. 6 zeigt drei Druckwangen 5 gemäß der ein­gangs angeführten DE-PS 951 146. Jede der Druckwangen ist durch einen Druckzylinder (Pfeil 18) beaufschlagbar. Die Druckwangen sind durch Sperriegel 17 untereinander zu einem starren Gebilde verbindbar.The figures 6 to 9 serve to compare the invention and the prior art. 6 shows three pressure cheeks 5 according to DE-PS 951 146 mentioned at the beginning. Each of the pressure cheeks can be acted upon by a pressure cylinder (arrow 18). The pressure cheeks can be connected to one another to form a rigid structure by means of locking bolts 17.

Demgegenüber weist Fig. 7 eine Druckwange 5 auf mit drei, oder wie hier angedeutet, mehreren Segmenten 6. Jedes der Segmente ist un­abhängig voneinander durch Druckzylinder (Pfeil 18) beaufschlagbar. Die Druckzylinder greifen in den Eckbereichen, wie es in Fig. 2 darge­stellt worden ist, an den Segmenten an.In contrast, FIG. 7 has a pressure cheek 5 with three, or as indicated here, a plurality of segments 6. Each of the segments can be acted upon independently of one another by pressure cylinders (arrow 18). The pressure cylinders act on the segments in the corner regions, as has been shown in FIG. 2.

Die Fign. 8 und 9 zeigen Ausgestaltungen gemäß der Fign. 1 bis 5 mit unterschiedlich angeordneten, überstehenden Anschlägen 11.The figures 8 and 9 show configurations according to FIGS. 1 to 5 with differently arranged, protruding stops 11.

Claims (4)

1. Ziehapparat in einer Presse, mit über eine Druckwange auf Blechhalter und Werkstück im Werkzeug wirkenden Druckzylindern, wobei die Druckwange in einzelne Seggente unterteilt ist und die Segmente einzeln oder gemeinsam gegen Blechhalter eines Werkzeugs, eines Werk­zeugsatzes oder gegen Blechhalter unterschiedlicher, auch gleichzei­tig beaufschlagter Werkzeuge legbar sind, dadurch gekennzeichnet, daß in den Eckbereichen (7) jedes der Segmente (6) zumindest ein Druckzylinder (9) angreift.1.Drawing apparatus in a press, with pressure cylinders acting on a sheet metal holder and workpiece in the tool via a pressure cheek, the pressure cheek being divided into individual segments and the segments individually or jointly against sheet metal holders of a tool, a tool set or against sheet metal holders of different, also simultaneously loaded tools can be laid, characterized in that in the corner areas (7) each of the segments (6) engages at least one pressure cylinder (9). 2. Ziehapparat nach Anspruch 1, dadurch gekennzeichnet, daß jeweils eines von zwei benachbarten Segmenten (6) mit überstehen­den Anschlägen (11) versehen ist, die unter das andere Segment grei­fen.2. Drawing apparatus according to claim 1, characterized in that one of two adjacent segments (6) is provided with protruding stops (11) which engage under the other segment. 3. Ziehapparat nach Anspruch 2, dadurch gekennzeichnet, daß zwischen jedem Anschlag (11) an dem einen benachbarter Segmente (6) und einer Anlagefläche (15) an dem anderen der Segmente ein Kugel- o.dgl. Gelenk (12) eingebaut ist.3. Drawing apparatus according to claim 2, characterized in that between each stop (11) on one of the adjacent segments (6) and a contact surface (15) on the other of the segments, a ball or the like. Joint (12) is installed. 4. Ziehapparat nach einem oder mehreren der vorgenannten An­sprüche, dadurch gekennzeichnet, daß die Druckzylinder (9) ge­gen die überstehenden Anschläge (11) die Eckbereiche (7) benachbarter Segmente (6) beaufschlagend gelegt sind.4. Drawing apparatus according to one or more of the preceding claims, characterized in that the pressure cylinder (9) against the protruding stops (11) are placed on the corner regions (7) of adjacent segments (6).
EP90110929A 1989-06-14 1990-06-09 Pressure cheek in the drawing apparatus of a press Expired - Lifetime EP0402800B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3919372A DE3919372A1 (en) 1989-06-14 1989-06-14 PRESSURE WIRE IN THE DRAWER OF A PRESS
DE3919372 1989-06-14

Publications (2)

Publication Number Publication Date
EP0402800A1 true EP0402800A1 (en) 1990-12-19
EP0402800B1 EP0402800B1 (en) 1994-03-30

Family

ID=6382705

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90110929A Expired - Lifetime EP0402800B1 (en) 1989-06-14 1990-06-09 Pressure cheek in the drawing apparatus of a press

Country Status (3)

Country Link
EP (1) EP0402800B1 (en)
DE (2) DE3919372A1 (en)
ES (1) ES2052101T3 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0753396A2 (en) * 1995-07-14 1997-01-15 S.I.T.I. S.p.A. Società Impianti Termoelettrici Industriali Device suitable to be used with a pressing apparatus
EP1063028B2 (en) † 1999-06-23 2007-06-13 Müller Weingarten AG Press for external hydroforming

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3494169A (en) * 1966-01-21 1970-02-10 Nat Steel Corp Deep drawing method and apparatus
DE2331754A1 (en) * 1973-06-22 1975-01-09 Siempelkamp Gmbh & Co Multicylinder hydraulic tube forming press - automatic control system equalises pressure on cylinders
DE2511569B2 (en) * 1974-05-31 1979-05-10 Bernard Joseph Dearborn Mich. Wallis (V.St.A.) Device for the resilient support of press components

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE951146C (en) * 1952-08-30 1956-10-25 Weingarten Ag Maschf Compressed air device for sheet metal drawing presses
DE3915795C1 (en) * 1989-05-13 1991-01-31 Maschinenfabrik Mueller-Weingarten Ag, 7987 Weingarten, De

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3494169A (en) * 1966-01-21 1970-02-10 Nat Steel Corp Deep drawing method and apparatus
DE2331754A1 (en) * 1973-06-22 1975-01-09 Siempelkamp Gmbh & Co Multicylinder hydraulic tube forming press - automatic control system equalises pressure on cylinders
DE2511569B2 (en) * 1974-05-31 1979-05-10 Bernard Joseph Dearborn Mich. Wallis (V.St.A.) Device for the resilient support of press components

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0753396A2 (en) * 1995-07-14 1997-01-15 S.I.T.I. S.p.A. Società Impianti Termoelettrici Industriali Device suitable to be used with a pressing apparatus
EP0753397A2 (en) * 1995-07-14 1997-01-15 S.I.T.I. S.p.A. Società Impianti Termoelettrici Industriali Device suitable to be used with a pressing apparatus
EP0753396A3 (en) * 1995-07-14 1997-10-29 Siti Spa Device suitable to be used with a pressing apparatus
EP0753397A3 (en) * 1995-07-14 1997-10-29 Siti Spa Device suitable to be used with a pressing apparatus
EP1063028B2 (en) † 1999-06-23 2007-06-13 Müller Weingarten AG Press for external hydroforming

Also Published As

Publication number Publication date
DE59005154D1 (en) 1994-05-05
DE3919372A1 (en) 1990-12-20
EP0402800B1 (en) 1994-03-30
ES2052101T3 (en) 1994-07-01

Similar Documents

Publication Publication Date Title
EP0106056B1 (en) Device in particular for the loading and unloading of a sheet metalworking machine
EP0388610B1 (en) Press plant with several presses for treating sheet steel parts
EP0173755B1 (en) Drawing device in a press
DE3235646A1 (en) DEVICE FOR PROMOTING OBJECTS
DE19928422A1 (en) Press for external high pressure molding
EP0510507B1 (en) Drawing device in the table of a press
DE3135266C2 (en) Cutting press for cutting out or separating parts from a workpiece sheet
EP0402800A1 (en) Pressure cheek in the drawing apparatus of a press
EP1702692B1 (en) Hemming device
EP0370956A2 (en) Method and apparatus for bending metal sheet sections
DE19525085A1 (en) Multiple arrangement of internal high pressure reshaping tools in press - comprises reshaping tools stacked one above other, with uppermost tool attached to press ram, and lowermost tool attached to press bed
DE3433566C2 (en) Press training for the automatic change of heavy tools, in which the tool is pulled out of the press onto a tool change carriage or pushed into the press by this
DE3875243T2 (en) MATRIX EXCHANGE AT PRESSES.
DE4320430C2 (en) Transfer Press complex
EP0266624A2 (en) Upper tool holder for a punch or the like
DE4004289C2 (en) Device for receiving blank boards in the side stand of a transfer press
DE3824997C1 (en)
DE10030792C2 (en) Multi-stage press, in particular cross transport press, with hydraulic closing device
DE3404307C2 (en)
DE19941218C1 (en) Tool clamping device for press or stamping machine uses upper and lower vacuum-suction plates for securing cooperating upper and lower tool components
EP1402968A1 (en) Hemming device
EP0510505B1 (en) Drawing device in a press
DE3734636A1 (en) Quick-change device for tools in deep-drawing presses
DE4004299C2 (en) Device for changing the form mask of a transfer press arranged in the empty stage of the side stand when changing tools
DE3504057C2 (en) Tool for non-cutting sheet metal processing, especially for deep drawing, folding or the like.

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE ES FR GB IT SE

17P Request for examination filed

Effective date: 19910531

17Q First examination report despatched

Effective date: 19920717

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE ES FR GB IT SE

REF Corresponds to:

Ref document number: 59005154

Country of ref document: DE

Date of ref document: 19940505

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19940415

ET Fr: translation filed
ITF It: translation for a ep patent filed

Owner name: STUDIO JAUMANN

EAL Se: european patent in force in sweden

Ref document number: 90110929.8

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
REG Reference to a national code

Ref country code: ES

Ref legal event code: PC2A

Owner name: SCHULER GMBH

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20000614

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20000626

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 20000630

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20000718

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20000816

Year of fee payment: 11

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20010609

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20010610

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20010610

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20010609

EUG Se: european patent has lapsed

Ref document number: 90110929.8

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20020228

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20020403

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20020711

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050609