EP0402800A1 - Pressure cheek in the drawing apparatus of a press - Google Patents
Pressure cheek in the drawing apparatus of a press Download PDFInfo
- 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
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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
- B21D24/02—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
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
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
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
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.
- 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
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
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
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
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
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
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
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
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)
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)
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)
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)
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 |
-
1989
- 1989-06-14 DE DE3919372A patent/DE3919372A1/en not_active Withdrawn
-
1990
- 1990-06-09 ES ES90110929T patent/ES2052101T3/en not_active Expired - Lifetime
- 1990-06-09 DE DE90110929T patent/DE59005154D1/en not_active Expired - Fee Related
- 1990-06-09 EP EP90110929A patent/EP0402800B1/en not_active Expired - Lifetime
Patent Citations (3)
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)
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 |
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