EP1227904B1 - Presse d'emboutissage et procede d'emboutissage de pieces en tole - Google Patents

Presse d'emboutissage et procede d'emboutissage de pieces en tole Download PDF

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Publication number
EP1227904B1
EP1227904B1 EP00953175A EP00953175A EP1227904B1 EP 1227904 B1 EP1227904 B1 EP 1227904B1 EP 00953175 A EP00953175 A EP 00953175A EP 00953175 A EP00953175 A EP 00953175A EP 1227904 B1 EP1227904 B1 EP 1227904B1
Authority
EP
European Patent Office
Prior art keywords
cushion
deep
cylinders
pressure
press
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
EP00953175A
Other languages
German (de)
English (en)
Other versions
EP1227904A1 (fr
Inventor
Bernd Naumann
Steffen Noack
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.)
Fraunhofer Gesellschaft zur Forderung der Angewandten Forschung eV
Original Assignee
Fraunhofer Gesellschaft zur Forderung der Angewandten Forschung eV
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 Fraunhofer Gesellschaft zur Forderung der Angewandten Forschung eV filed Critical Fraunhofer Gesellschaft zur Forderung der Angewandten Forschung eV
Publication of EP1227904A1 publication Critical patent/EP1227904A1/fr
Application granted granted Critical
Publication of EP1227904B1 publication Critical patent/EP1227904B1/fr
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
    • B21D24/02—Die-cushions

Definitions

  • the invention relates to a deep-drawing press with a table-drawing cushion and a tool arrangement with at least one upper tool attached to a press ram, at least one sheet holder supported by pillow pins and at least one Lower tool in connection with a press table.
  • a multi-point drawing cushion can be used, whereby the piston rods of the cushion cylinders, analogous to the cushion bolts, act directly on the sheet metal holder of the tool.
  • the piston rods of the cushion cylinders analogous to the cushion bolts, act directly on the sheet metal holder of the tool.
  • there will be several Tools placed over an undivided pillow so if it is off-center Load case compensating bolts are used for load compensation, for which, however, often no space is available.
  • the required sheet metal holder force is also usual less when using several smaller tools than with one large tool.
  • the invention is therefore based on the object of a deep-drawing press of the type mentioned Art to improve so that in conjunction with an undivided cushion plate both large as well as small tools without undue stress on the cushion guide can be used, and in all cases an improved method for deep drawing sheet metal workpieces is achieved through improved sheet metal holder function.
  • outer cushion cylinders have been subjected to the deformation of sheet metal workpieces large tools only make up a small proportion of the total sheet holding force and serve mainly to compensate for tilting movements in the active system as well as the position control the top dead center of the pillow. They also take over the pillow acceleration before the forming process, as well as ejecting the workpiece after the forming process.
  • the undivided cushion plate is preferred designed so that at least one cushion cylinder in the central area below the cushion plate is arranged in such a way that it is pressed against it with a slight preload presses the pillow top.
  • the inner cylinders carry the majority of the required forming force.
  • a control device provided depending on the path and pressure signals of the tool arrangement pressurizing the inner and outer cushion cylinders.
  • the pressure signals from all cylinder chambers the cushion cylinder as well as the measured values of cushion and Ram travel are compared with the target values for position and tipping detection.
  • the valves of the cushion cylinders are activated.
  • Tools are used in the edge area of the deep-drawing press, for example at a tool arrangement as a transfer tool.
  • the outer cushion cylinders are used to generate an eccentric cushion force pressurized.
  • both only the outer cushion cylinder as well as the outer and inner pillow cylinders in combination with each other be pressurized. This enables the processing of sheet metal workpieces with different flow directions. So long sheet metal workpieces machined along the deep drawing press by 2-3 tools with an eccentric cushion force become.
  • 2-6 smaller tools can be arranged in a rectangular arrangement in the transverse direction the deep drawing press can be processed.
  • Figure 1 shows an overview of the different tool assignments above the press table 6, which are explained in more detail below.
  • Figure 1a) to 1c) show the assignment with a large tool 5, a central cushion force K, in FIG 1b) an eccentric cushion force K which can be changed via the cushion stroke and in FIG 1c) an influenceable load distribution K is generated on the drawing pins.
  • Figure 1d) Assignment with 2-3 smaller tools 5 for long, narrow parts and one pass in the longitudinal direction with an eccentric cushion force K to be generated for 1 tool shown.
  • FIG. 1e) shows a tool arrangement with 2-6 smaller tools 5 in the rectangular arrangement for processing in the transverse direction of the deep-drawing press with one Cushion force K for 1-2 tools. In all of these cases are preferably in the corner areas the cushion plate 8 (which is not visible here because it is under the press table 6 is located) outer cushion cylinder 9 for receiving the predominantly eccentric Cushion force K is provided, as will be explained in more detail below.
  • FIG. 2 An embodiment of a transfer tool in which only a relatively low forming force is shown in Figure 2.
  • a sheet metal workpiece 3, stored on a Sheet metal holder 4 is formed by the upper tool attached to the press ram 1 2 is pressed against the lower tool 5.
  • the outer cushion cylinder 9 not only the position control of the cushion plate 8, but also the total sheet holder force required.
  • inner cushion cylinders 10 are pressurized.
  • the inner cushion cylinders 10 carry the major part of the sheet metal holding force through which outer cushion cylinder 9, in turn, the position control and the pre-acceleration the pillow.
  • FIG. 5 shows the lower area of a deep-drawing press for processing sheet metal workpieces shown, consisting of a press table 6 and an arrangement of outer and inner cushion cylinders 9,10. Both the outer and the inner Cushion cylinders 9, 10 become highly dynamic with neighboring compressed gas containers 12 Pressure applied.
  • the cushion plate assembly 8 by the outer and the inner cushion cylinders 9, 10 are guided in the press table.
  • the outer pillow cylinders 9 are gimbaled to the cushion plate 8 through bolts 13 through openings in the carrier 11 connected.
  • FIG. 7 shows the structure with 4 outer cushion cylinders 9 and 3 inner cushion cylinders 10 shown.
  • the inner cushion cylinders 10 do not have to have a firm connection to the cushion plate 8. You will be replaced by a appropriate prestressing pressure against the cushion plate
  • FIG. 8 schematically shows the arrangement for force and position control in the form of a sequence control, by the path on the plunger 1 by means of Wegmeßgebem 13, and path and Pressure on all cushion cylinders 9, 10 by means of displacement transducers 14 and pressure transducers 15 is measured.
  • the determined pressure signals p, the measured values of the cushion plate path ski and the measured values of the tappet travel sst serve, as in the control device 16 according to Figure 9 shown, after a comparison with the target values for a control the stroke controller, the tilt controller in the x direction and the tilt controller in the y direction, and a synchronization.
  • the valves of the Cushion cylinder 9.10 controlled to the required position of the cushion plate 8 and the to achieve the required sheet metal holder force.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Printing Methods (AREA)
  • Press Drives And Press Lines (AREA)
  • Presses And Accessory Devices Thereof (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)

Claims (8)

  1. Presse d'emboutissage avec des coussins de serre-flan de table et un dispositif d'outillage avec au moins un outillage supérieur (2) fixé à un pilon (1), au moins un serre-flan (4) soutenu par des boulons de coussins (7) et au moins un outillage inférieur (5) raccordé à une table de presse (6), où, avec une plaque de coussins (8) en une pièce, une pluralité de cylindres de coussins extérieurs (9) est disposée au moins dans des zones d'angle de la plaque de coussins (8), caractérisée en ce qu'un dispositif de commande (16) est prévu, en liaison avec des capteurs de mesure de course (13, 14) ainsi qu'avec des capteurs de pression (15), pour l'alimentation en pression individuelle des cylindres de coussins (9).
  2. Presse d'emboutissage selon la revendication 1, caractérisée en ce qu'au moins un cylindre de coussin intérieur (10) est prévu sous la plaque de coussins (8).
  3. Presse d'emboutissage selon la revendication 2, caractérisée en ce que le dispositif de commande (16) actionne une alimentation en pression des cylindres de coussin intérieurs et extérieurs (9, 10) en fonction de signaux de course et/ou de pression du dispositif d'outillage.
  4. Presse d'emboutissage selon au moins l'une quelconque des revendications précédentes 1 à 3, caractérisée en ce qu'une course du pilon (sst) est détectée par des capteurs de mesure de course (13) et une course de la plaque de coussins (ski) est détectée par des capteurs de mesure de course (14) et une pression des cylindres de coussins (p) est détectée par des capteurs de mesure de pression (15) et les valeurs de mesure de la course de la plaque de coussins (ski) et de la course du pilon (sst) ainsi que les signaux de pression (p) servent, en fonction d'une comparaison valeur consigne-valeur effective, à commander un régulateur de levage ainsi qu'un régulateur de basculement x, un régulateur de basculement y, ainsi qu'une synchronisation dont les signaux de sortie commandent des soupapes des cylindres de coussins (9, 10).
  5. Presse d'emboutissage selon au moins l'une quelconque des revendications précédentes 1 à 4, caractérisée en ce le dispositif d'outillage est un outillage de transfert (17) avec au moins un outillage d'emboutissage (2, 5) dans la zone de bord.
  6. Procédé pour l'emboutissage de pièces en tôle selon l'une quelconque des revendications précédentes 1 à 5, caractérisé en ce que, en cas de force de déformation réduite, seuls des cylindres de coussins (9) extérieurs, actifs dans les zones d'angle de la plaque de coussins (8) en une pièce, sont alimentés en pression et d'autres cylindres de coussins (10) intérieurs, prévus dans la zone sous la plaque de coussins (8), restent exempts de pression.
  7. Procédé pour l'emboutissage de pièces en tôle selon la revendication 6, caractérisé en ce que, en fonction d'une force de déformation, les cylindres de coussins extérieurs et intérieurs (9, 10) sont alimentés en pression en combinaison les uns avec les autres.
  8. Procédé pour l'emboutissage de pièces en tôle selon la revendication 6 ou 7, caractérisé en ce qu'un réglage de la force et de la position est réalisé pour la commande parallèle ou non parallèle de la plaque de coussins par rapport à la table ou au pilon.
EP00953175A 1999-11-09 2000-08-17 Presse d'emboutissage et procede d'emboutissage de pieces en tole Expired - Lifetime EP1227904B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19953860A DE19953860A1 (de) 1999-11-09 1999-11-09 Tiefziehpresse und Verfahren zum Tiefziehen von Blechwerkstücken
DE19953860 1999-11-09
PCT/EP2000/008047 WO2001034319A1 (fr) 1999-11-09 2000-08-17 Presse d'emboutissage et procede d'emboutissage de pieces en tole

Publications (2)

Publication Number Publication Date
EP1227904A1 EP1227904A1 (fr) 2002-08-07
EP1227904B1 true EP1227904B1 (fr) 2003-07-16

Family

ID=7928416

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00953175A Expired - Lifetime EP1227904B1 (fr) 1999-11-09 2000-08-17 Presse d'emboutissage et procede d'emboutissage de pieces en tole

Country Status (8)

Country Link
US (1) US20020184935A1 (fr)
EP (1) EP1227904B1 (fr)
JP (1) JP2003513801A (fr)
AT (1) ATE245060T1 (fr)
DE (2) DE19953860A1 (fr)
ES (1) ES2202158T3 (fr)
PT (1) PT1227904E (fr)
WO (1) WO2001034319A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002090875A2 (fr) 2001-05-07 2002-11-14 Northwestern University Capteurs a entrainement en temps reel et procedes de fabrication
DE10334878A1 (de) * 2003-07-29 2005-03-10 Behr Gmbh & Co Kg Umform-Werkzeug und Verfahren zum Umformen eines Werkstücks
JP5680121B2 (ja) * 2013-01-24 2015-03-04 アイダエンジニアリング株式会社 プレス機械のダイクッション装置及びダイクッション制御方法
DE102017222629B4 (de) * 2017-12-13 2020-02-06 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Unterbau einer zur Umformung von plattenförmigen Bauteilen ausgebildeten Vorrichtung

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1483204A (en) * 1918-04-11 1924-02-12 Marquette Tool & Mfg Co Die cushion
US3522939A (en) * 1967-10-02 1970-08-04 Dro Systems Inc Di Metal working press cushion structure
DE3242705C2 (de) * 1982-11-19 1985-10-31 Maschinenfabrik Müller-Weingarten AG, 7987 Weingarten Im Pressentisch einer einfach wirkenden Ziehpresse angeordnete Drucklufteinrichtung
DE59101219D1 (de) * 1990-04-23 1994-04-28 Mueller Weingarten Maschf Zieheinrichtung in einer Presse zum Ziehen von Blechformteilen.

Also Published As

Publication number Publication date
US20020184935A1 (en) 2002-12-12
PT1227904E (pt) 2003-10-31
EP1227904A1 (fr) 2002-08-07
JP2003513801A (ja) 2003-04-15
DE19953860A1 (de) 2001-05-17
ES2202158T3 (es) 2004-04-01
DE50002932D1 (de) 2003-08-21
WO2001034319A1 (fr) 2001-05-17
ATE245060T1 (de) 2003-08-15

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