EP0510505B1 - Drawing device in a press - Google Patents

Drawing device in a press Download PDF

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Publication number
EP0510505B1
EP0510505B1 EP92106506A EP92106506A EP0510505B1 EP 0510505 B1 EP0510505 B1 EP 0510505B1 EP 92106506 A EP92106506 A EP 92106506A EP 92106506 A EP92106506 A EP 92106506A EP 0510505 B1 EP0510505 B1 EP 0510505B1
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EP
European Patent Office
Prior art keywords
cylinders
setbolts
movement
press
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.)
Expired - Lifetime
Application number
EP92106506A
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German (de)
French (fr)
Other versions
EP0510505A1 (en
Inventor
Klaus Siegert
Eckart Dannenmann
Rolf Kellenbenz
Alfred Bareis
Horst Pfisterer
Hartmut Hoffmann
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
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Filing date
Publication date
Application filed by L Schuler GmbH filed Critical L Schuler GmbH
Publication of EP0510505A1 publication Critical patent/EP0510505A1/en
Application granted granted Critical
Publication of EP0510505B1 publication Critical patent/EP0510505B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • 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
    • B21D24/10—Devices controlling or operating blank holders independently, or in conjunction with dies
    • B21D24/14—Devices controlling or operating blank holders independently, or in conjunction with dies pneumatically or hydraulically

Definitions

  • the invention relates to a drawing device in a press according to the preamble of claim 1.
  • the sheet metal part edges are to be held.
  • the sheet metal holding is carried out by countering a sheet metal holder which is force and displacement controlled by the drawing device, with the sheet metal part edge being interposed on a contact surface in the upper part of the tool.
  • the sheet metal parts can be ejected from the lower part of the tool using the sheet metal holder and the corresponding actuation of the drawing cylinder or a separate ejector cylinder.
  • there are sheet metal parts of different sizes or at the same time e.g.
  • the forming and ejection of the sheet metal parts can be carried out with a movable drawing die in the lower part of the tool, so that the pressure bolts acting on the sheet metal holder or the drawing die must also be selected for this purpose.
  • DE 34 05 316 C2 discloses a pulling device in a stepped press.
  • a sliding table can be moved into the press, with which a tool or a tool set can be exchanged.
  • a pulling device with, for example, four pressure cylinders, the piston rods of which act on a pressure cheek.
  • Pressure bolts are supported on the pressure cheek and can be raised and lowered by the drawing cylinders and pressurized for a sheet metal holder or ejector force.
  • the die cushion as a whole is slidably arranged between the individual work stages of the step press.
  • Claim 5 thus represents an embodiment which enables a traversing movement of the drawing cylinders in two horizontal directions of movement (axes) in order to expand the possibilities of using existing drawing cylinders.
  • the link to the distance between the cylinders in a block is omitted.
  • a pulling device 3 which interacts with pressure bolts 5, 6 for the pressure and movement control of a sheet metal holder 21.
  • the pressure bolts 5, 6, of which the pressure bolts positioned at 6 are raised by the pulling device, are guided in a perforated plate 4 and held in a crossbar 7 supported by web bolts or plates 8.
  • the drawing cylinders 9, 10 are located below the pressure bolts 5, 6 and are individually or, as shown, block-mounted displaceably in rails 13.
  • the drawing cylinders can be controlled via valves 15 from a pressure supply, and their push rods 11, 12 can be placed against the pressure bolts 5, 6 from below.
  • the position of the piston rods 12 which raises the pressure bolts 6 is shown for two of the drawing cylinders.
  • the displacement movement of the drawing cylinders 9, 10 in the rails takes place by means of hydraulic servomotors 14, which are commercially available, and push rods 16, which are guided out of them and which are firmly connected to the drawing cylinders or drawing cylinder blocks 20 (FIGS. 1, 2) or a worm spindle drive ( 3, 4) which has a motor (not shown) which acts via a worm 19 and a worm wheel 18 on a threaded spindle 17 which, in the sense of a right-left rotation of the worm 18, a displacement movement of an individual drawing cylinder or a drawing cylinder block in one horizontal direction.
  • the sheet metal holder 21 indicated in the figures is matched in shape and size to the shape and size of the sheet metal part to be formed. In individual cases, it may be sufficient to control the sheet metal holder discreetly when forming a sheet metal part or the sheet metal holder when forming two sheet metal parts that are, for example, mirror-like or also the same sheet metal parts in only four points. In any case, because of the shape and size, it must be possible for the sheet metal holder (s) to be loaded in different areas in order to be able to deal with the drawing conditions. This may require the drawing cylinders 9, 10 to be mounted in slides, the slides, as shown as block 20 in FIG.
  • a (fixed) distance between the cylinders 9, 10 is provided in the block 20, which corresponds to the Distance from two adjacent pressure bolts 5, 6 corresponds. Thanks to the additional horizontal movement axis that has been set up, n times a fixed distance is possible when setting up a new workpiece - tool change.

Description

Die Erfindung betrifft eine Zieheinrichtung in einer Presse gemäß dem Oberbegriff des Anspruchs 1. Beim Umformen - Ziehen bzw. Tiefziehen - von Blechen bzw. Blechteilen sind die Blechteilränder zu halten. Die Blechhaltung erfolgt durch Gegenlage eines durch die Zieheinrichtung kraft- und weggesteuerten Blechhalters unter Zwischenlage des Blechteilrandes an einer Anlagefläche im Werkzeugoberteil. Nach dem Umformen kann über den Blechhalter und entsprechender Ansteuerung der Ziehzylinder oder eines gesonderten Auswerferzylinders der Auswurf der Blechteile aus dem Werkzeugunterteil erfolgen. Einerseits sind Blechteile unterschiedlicher Größe oder es sind gleichzeitig z.B. bei spiegelgleiche Blechteile umzuformen, so daß nur bestimmte Ziehzylinder zu beaufschlagen sind entsprechend der Größe des bzw. der Blechhalter. Andererseits kann die Umformung und der Auswurf der Blechteile mit beweglicher Ziehmatrize im Werkzeugunterteil erfolgen, so daß auch hierfür eine Selektierung der auf den Blechhalter bzw. die Ziehmatrize wirkenden Druckbolzen erfolgen muß.The invention relates to a drawing device in a press according to the preamble of claim 1. When forming - drawing or deep-drawing - sheets or sheet metal parts, the sheet metal part edges are to be held. The sheet metal holding is carried out by countering a sheet metal holder which is force and displacement controlled by the drawing device, with the sheet metal part edge being interposed on a contact surface in the upper part of the tool. After forming, the sheet metal parts can be ejected from the lower part of the tool using the sheet metal holder and the corresponding actuation of the drawing cylinder or a separate ejector cylinder. On the one hand there are sheet metal parts of different sizes or at the same time e.g. in the case of sheet metal parts of the same shape, so that only certain drawing cylinders are to be loaded according to the size of the sheet metal holder (s). On the other hand, the forming and ejection of the sheet metal parts can be carried out with a movable drawing die in the lower part of the tool, so that the pressure bolts acting on the sheet metal holder or the drawing die must also be selected for this purpose.

In der DE 34 05 316 C2 ist eine Zieheinrichtung offenbart in einer Stufenpresse. In die Presse ist ein Schiebetisch verfahrbar, mit dem ein Werkzeug bzw. ein Werkzeugsatz austauschbar ist. Im Pressentisch befindet sich eine Zieheinrichtung mit beispielsweise vier Druckzylindern, deren Kolbenstangen auf eine Druckwange wirken. Auf der Druckwange sind Druckbolzen abgestützt, die von den Ziehzylindern heb- und senkbar und für eine Blechhalter- bzw. Auswerferkraft durckbeaufschlagbar sind. Das Ziehkissen insgesamt ist zwischen den einzelnen Arbeitsstufen der Stufenpresse verschiebbar angeordnet.DE 34 05 316 C2 discloses a pulling device in a stepped press. A sliding table can be moved into the press, with which a tool or a tool set can be exchanged. In the press table there is a pulling device with, for example, four pressure cylinders, the piston rods of which act on a pressure cheek. Pressure bolts are supported on the pressure cheek and can be raised and lowered by the drawing cylinders and pressurized for a sheet metal holder or ejector force. The die cushion as a whole is slidably arranged between the individual work stages of the step press.

Demgegenüber ist es Aufgabe der Erfindung, einzelne Druckbolzen für die Blechhalterbetätigung beim Ziehen und Auswerfen zu beaufschlagen. Insbesondere soll hierbei die Beaufschlagung durch weniger Ziehzylinder als insgesamt an Druckbolzen vorhanden sind erfolgen.In contrast, it is an object of the invention to apply individual pressure bolts for the sheet metal holder actuation when pulling and ejecting. In particular, the application should be carried out by fewer drawing cylinders than there are in total on pressure bolts.

Diese Aufgabe ist gelöst durch die Merkmale des Anspruchs 1. Von besonderer Bedeutung ist hierbei die kurzfristige Stellungswahl der Ziehzylinder bei Werkzeugwechsel. Die Stellwerte sind speicherbar und so dem Werkzeug bzw. dem Werkzeugsatz für ein erneutes Einrichten direkt zuzuordnen.This object is achieved by the features of claim 1. The short-term position selection of the drawing cylinders when changing tools is of particular importance here. The manipulated values can be saved and thus directly assigned to the tool or tool set for re-setup.

Die weiteren Ansprüche kennzeichnen bevorzugte Ausgestaltungen. So stellt Anspruch 5 eine Ausgestaltung dar, die eine Verfahrbewegung der Ziehzylinder in zwei horizontalen Bewegungsrichtungen (Achsen) ermöglicht, um die Möglichkeiten in der Nutzung vorhandener Ziehzylinder zu erweitern. Die Bindung an den Abstand der Zylinder in eine Block entfällt.The further claims characterize preferred configurations. Claim 5 thus represents an embodiment which enables a traversing movement of the drawing cylinders in two horizontal directions of movement (axes) in order to expand the possibilities of using existing drawing cylinders. The link to the distance between the cylinders in a block is omitted.

Anhand von Ausführungsbeispielen soll im folgenden die Erfindung näher erläutert werden.The invention will be explained in more detail below on the basis of exemplary embodiments.

Die Zeichnung zeigt in:

Fig. 1
eine in den Tisch einer Presse integrierte Zieheinrichtung nach der Erfindung in teilgeschnittener Darstellungsweise,
Fig. 2
eine Darstellung der Zieheinrichtung entsprechend dem Schnittverlauf II-II in Fig. 1,
Fig. 3
einen zweiten Verstellantrieb für die Ziehzylinder in gegenüber der Fig. 1 vergrößerter Darstellung und
Fig. 4
eine Darstellung der Zieheinrichtung, entsprechend dem Schnittverlauf IV-IV in Fig. 3.
The drawing shows in:
Fig. 1
a pulling device integrated into the table of a press according to the invention in a partially cut representation,
Fig. 2
a representation of the pulling device corresponding to the section line II-II in Fig. 1,
Fig. 3
a second adjustment drive for the drawing cylinder in an enlarged view compared to FIG. 1 and
Fig. 4
a representation of the pulling device, corresponding to the section IV-IV in Fig. 3rd

In den Pressentisch 1 einer Presse, von der Pressenständer 2 angedeutet sind, ist eine Zieheinrichtung 3 integriert, die mit Druckbolzen 5, 6 für die Druck- und Bewegungssteuerung eines Blechhalters 21 zusammenwirkt. Die Druckbolzen 5, 6, von denen die mit 6 positionierten Druckbolzen durch die Zieheinrichtung angehoben sind, sind in einer Lochplatte 4 geführt und in einer durch Stegbolzen oder -bleche 8 abgestützten Traverse 7 gehalten. Die Ziehzylinder 9, 10 befinden sich unterhalb der Druckbolzen 5, 6 und sind einzeln, oder wie gezeigt, blockweise in Schienen 13 verschieblich gelagert. Die Ziehzylinder sind über Ventile 15 aus einer Druckversorgung ansteuerbar, und deren Druckstangen 11, 12 sind von unten gegen die Druckbolzen 5, 6 legbar. Für zwei der Ziehzylinder ist die die Druckbolzen 6 anhebende Stellung der Kolbenstangen 12 dargestellt. Die Verschiebebewegung der Ziehzylinder 9, 10 in den Schienen erfolgt vermittels hydraulischer Stellmotore 14, die handelserhältlich sind und aus diesen herausgeführte Druckstangen 16, die an die Ziehzylinder bzw. Ziehzylinderblöcke 20 fest angeschlossen sind (Fign. 1, 2) oder einen Schnecken-Spindeltrieb (Fign. 3, 4) der einen Motor (nicht gezeigt) aufweist, der über eine Schnecke 19 und ein Schneckenrad 18 auf eine Gewindespindel 17 wirkt, die im Sinne einer Rechts-Linksdrehung der Schnecke 18 eine Verschiebebewegung eines einzelnen Ziehzylinders oder eines Ziehzylinderblocks in einer horizontalen Richtung bewirkt.In the press table 1 of a press, from which press stands 2 are indicated, a pulling device 3 is integrated, which interacts with pressure bolts 5, 6 for the pressure and movement control of a sheet metal holder 21. The pressure bolts 5, 6, of which the pressure bolts positioned at 6 are raised by the pulling device, are guided in a perforated plate 4 and held in a crossbar 7 supported by web bolts or plates 8. The drawing cylinders 9, 10 are located below the pressure bolts 5, 6 and are individually or, as shown, block-mounted displaceably in rails 13. The drawing cylinders can be controlled via valves 15 from a pressure supply, and their push rods 11, 12 can be placed against the pressure bolts 5, 6 from below. The position of the piston rods 12 which raises the pressure bolts 6 is shown for two of the drawing cylinders. The displacement movement of the drawing cylinders 9, 10 in the rails takes place by means of hydraulic servomotors 14, which are commercially available, and push rods 16, which are guided out of them and which are firmly connected to the drawing cylinders or drawing cylinder blocks 20 (FIGS. 1, 2) or a worm spindle drive ( 3, 4) which has a motor (not shown) which acts via a worm 19 and a worm wheel 18 on a threaded spindle 17 which, in the sense of a right-left rotation of the worm 18, a displacement movement of an individual drawing cylinder or a drawing cylinder block in one horizontal direction.

Der in den Figuren angedeutete Blechhalter 21 ist in Form und Größe abgestimmt auf die Form und Größe des umzuformenden Blechteils. Im Einzelfall mag es ausreichend sein, den Blechhalter beim Umformen eines Blechteils bzw. die Blechhalter beim Umformen von zwei z.B. spiegelgleichen Blechteilen oder auch gleicher Blechteile in nur vier Punkten diskret anzusteuern. In jede Fall muß wegen der Form und Größe eine Beaufschlagung des bzw. der Blechhalter in unterschiedlichen Bereichen möglich sein, um auf die Ziehverhältnisse eingehen zu können. Dieses erfordert ggf. eine Lagerung der Ziehzylinder 9, 10 in Schlitten, wobei die Schlitten, wie diese als Block 20 in Fig. 4 dargestellt sind, in einer ersten horizontalen Bewegungsrichtung (Achse) in den Schienen 13 vermittels Stellmittel und Bewegungsübertragungsmittel, wie zuvor beschrieben, bewegbar sind. Die Schlitten 20 sind für den Bewegungsantrieb der Ziehzylinder 9, 10 in einer Bewegung quer zur ersten Bewegungsrichtung mit Schienen zu versehen, in denen die Zylinder bewegbar gelagert und über gleiche, wie zu den Fign. 1 und 3 genannte Stellmotore 14 und Stellmittel 17, 18, 19 bewegbar, so daß eine Mehrzahl an Druckbolzen 5, 6 entsprechend der Anzahl an Ziehzylindern 9, 10 aus in eine Rasterfeld angeordneten Druckbolzen anfahr- und danach ansteuerbar sind. Entsprechend Fign. 1 und 2 ergibt sich für dieses Beispiel ein Rasterfeld von 3 x 8 Druckbolzen 5, 6. In den Ausgestaltungen der Fign. 1 bis 4 ist ein (fester) Abstand der Zylinder 9, 10 in dem Block 20 vorgesehen, der dem Abstand von zwei benachbarten Druckbolzen 5, 6 entspricht. Durch die zusätzlich eingerichtete zweite horizontale Bewegungsachse sind das n-fache eines festen Abstands beim Einrichten auf ein neues Werkstück - Werkzeugwechsel - möglich.The sheet metal holder 21 indicated in the figures is matched in shape and size to the shape and size of the sheet metal part to be formed. In individual cases, it may be sufficient to control the sheet metal holder discreetly when forming a sheet metal part or the sheet metal holder when forming two sheet metal parts that are, for example, mirror-like or also the same sheet metal parts in only four points. In any case, because of the shape and size, it must be possible for the sheet metal holder (s) to be loaded in different areas in order to be able to deal with the drawing conditions. This may require the drawing cylinders 9, 10 to be mounted in slides, the slides, as shown as block 20 in FIG. 4, in a first horizontal direction of movement (axis) in the rails 13 by means of actuating means and movement transmission means, as previously described , are movable. For the movement drive of the drawing cylinders 9, 10, the slides 20 are to be provided with rails in a movement transverse to the first direction of movement, in which rails the cylinders are movably supported and by the same as in FIGS. 1 and 3 called actuators 14 and actuating means 17, 18, 19 movable, so that a plurality of pressure pins 5, 6 corresponding to the number of drawing cylinders 9, 10 can be started from pressure pins arranged in a grid and then controlled. According to FIGS. 1 and 2 results in a grid of 3 x 8 pressure bolts 5, 6 for this example. In the configurations of FIGS. 1 to 4, a (fixed) distance between the cylinders 9, 10 is provided in the block 20, which corresponds to the Distance from two adjacent pressure bolts 5, 6 corresponds. Thanks to the additional horizontal movement axis that has been set up, n times a fixed distance is possible when setting up a new workpiece - tool change.

Claims (5)

  1. Drawing device (3) in a press, having drawing cylinders (9, 10) for holding sheet parts during forming and, if appropriate, for ejecting the sheet parts from the bottom part of the tool after forming, the pistons of the drawing cylinders (9, 10) acting via setbolts (5, 6) on the sheet holder in the bottom part of the tool, characterized in that the drawing cylinders (9, 10) are arranged individually or in groups in different slides (20) and are guided via the latter in horizontal rails (13), which are fixed to the press, and are displaceable by means of actuators and movement-transfer means (14, 16, 17, 18, 19) in at least one direction of movement below the setbolts (5, 6) individually, in the case of a common adjustment arrangement in groups, the setbolts (5, 6) being actuated directly by the drawing cylinders (9, 10).
  2. Drawing device according to Claim 1, characterized in that the actuators are hydraulically actuable adjusting motors (14) whose pressure rods (16) are operatively connected to a drawing cylinder (9, 10) or to at least one drawing cylinder in each case.
  3. Drawing device according to Claim 1 or 2, characterized in that at least two drawing cylinders (9, 10) are arranged in a block (20) which is displaceable by means of an adjusting motor (14).
  4. Drawing device according to Claim 3, characterized in that the spacing of the drawing cylinders (9, 10) in a block (20) from one another corresponds to the spacing of two adjacent setbolts (5, 6).
  5. Drawing device according to one or more of the abovementioned claims, characterized in that the drawing cylinders (9, 10) are mounted in slides (20) so as to be likewise horizontally displaceable in rails (13) by means of adjusting motors (14) transversely to the direction of movement of the slides.
EP92106506A 1991-04-20 1992-04-15 Drawing device in a press Expired - Lifetime EP0510505B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4112945 1991-04-20
DE4112945A DE4112945A1 (en) 1991-04-20 1991-04-20 DRAWING DEVICE IN A PRESS

Publications (2)

Publication Number Publication Date
EP0510505A1 EP0510505A1 (en) 1992-10-28
EP0510505B1 true EP0510505B1 (en) 1995-08-16

Family

ID=6430002

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92106506A Expired - Lifetime EP0510505B1 (en) 1991-04-20 1992-04-15 Drawing device in a press

Country Status (3)

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EP (1) EP0510505B1 (en)
DE (2) DE4112945A1 (en)
ES (1) ES2077907T3 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4322061C1 (en) * 1993-07-02 1994-12-01 Schaefer Maschbau Wilhelm Apparatus for the simultaneous production of a plurality of component hollow bodies by the internal high-pressure forming method
DE4441442A1 (en) * 1994-11-23 1996-05-30 Erfurt Umformtechnik Gmbh Changing mechanism in driven tool carrier for presses

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3405316A1 (en) * 1984-02-15 1985-08-22 Maschinenfabrik Müller-Weingarten AG, 7987 Weingarten Displaceable hydraulic cushion as a drawing cushion for a multiple-die press with a sliding table
DE3406526A1 (en) * 1984-02-23 1985-09-12 Maschinenfabrik Müller-Weingarten AG, 7987 Weingarten Sliding table with built-in blank-holder frame

Also Published As

Publication number Publication date
ES2077907T3 (en) 1995-12-01
EP0510505A1 (en) 1992-10-28
DE59203261D1 (en) 1995-09-21
DE4112945A1 (en) 1992-10-22

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