EP0453955A1 - Dispositif pour emboutir des pièces de tôle dans une presse - Google Patents

Dispositif pour emboutir des pièces de tôle dans une presse Download PDF

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Publication number
EP0453955A1
EP0453955A1 EP91106194A EP91106194A EP0453955A1 EP 0453955 A1 EP0453955 A1 EP 0453955A1 EP 91106194 A EP91106194 A EP 91106194A EP 91106194 A EP91106194 A EP 91106194A EP 0453955 A1 EP0453955 A1 EP 0453955A1
Authority
EP
European Patent Office
Prior art keywords
pressure
sheet metal
cheek
metal holder
bolt
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
EP91106194A
Other languages
German (de)
English (en)
Other versions
EP0453955B1 (fr
Inventor
Klaus Dr.-Ing. Siegert
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.)
Maschinenfabrik Mueller Weingarten AG
Mueller Weingarten AG
Original Assignee
Maschinenfabrik Mueller Weingarten AG
Mueller Weingarten AG
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 Maschinenfabrik Mueller Weingarten AG, Mueller Weingarten AG filed Critical Maschinenfabrik Mueller Weingarten AG
Publication of EP0453955A1 publication Critical patent/EP0453955A1/fr
Application granted granted Critical
Publication of EP0453955B1 publication Critical patent/EP0453955B1/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
    • B21D24/10—Devices controlling or operating blank holders independently, or in conjunction with dies
    • B21D24/12—Devices controlling or operating blank holders independently, or in conjunction with dies mechanically
    • 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
    • B21D24/10—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 for drawing sheet metal parts according to the preamble of claim 1.
  • Known hydraulic drawing devices for presses for drawing sheet metal parts generally consist of an upper, vertically displaceable drawing ram as the upper part of the tool and a lower drawing punch which is stationary on a press table as the lower part of the tool, between which the sheet metal part to be formed is inserted.
  • this is done by a during the actual drawing process Drawing frame, hold-down or sheet metal holder held, which surrounds the drawing punch in one or more parts.
  • the sheet metal holder be arranged directly by several arranged below it Cylinder units are supported, which act directly on the sheet metal holder by means of their own pressure displacement control or regulation.
  • Four cylinders were generally used to support the sheet metal frame symmetrically.
  • Such an arrangement has the advantage that precise control or regulation of the application of force to the sheet metal holder is possible.
  • the small number of cylinder units supporting the sheet metal holder has the disadvantage that the support is insufficient even in certain areas and in the case of parts of complex structure.
  • a large number of cylinders could be arranged below the sheet holder in the press table.
  • each cylinder must be provided with a proportional valve control in order to be able to implement a separate pressure / displacement control or regulation. Such a route is likely to remain very costly.
  • a drawing device for a press according to the type of the present invention has also become known, in which a number of additional printing cylinder units are provided between the pressure cheek and the sheet metal holder.
  • the height of the pressure cheek itself is controlled by at least one pressure unit underneath.
  • Both the individual printing cylinders between the printing cheek and the sheet metal holder and the printing unit for the printing cheek itself can be actively or passively subjected to a control or regulation.
  • the pressurization of the sheet metal holder and thus that of counteracting force of the sheet metal holder acting against the drawing ram essentially due to the pressure cylinder units arranged between the sheet metal holder and the pressure cheek.
  • These are each designed as a stationary pressure cylinder with a continuous piston rod projecting on both sides, the lower piston rod part acting on the pressure cheek and the upper piston rod part acting on the sheet metal holder.
  • a generally provided passive regulation of the outflow of the pressure medium brings about the desired counter-holding force on the sheet metal holder, the counter-holding force between the sheet metal holder and the upper part of the tool during the drawing process being generated exclusively by the pressure cylinders arranged above the pressure cheek with appropriate control.
  • the pressure cheek of the known device which can be pressurized in the center from below, carries out a movement sequence which is synchronized with the ram movement and serves on the one hand to bring the sheet metal holder up to the position for inserting the workpiece and on the other hand to eject the workpiece into the transport plane. A locally different support and force application of this pressure cheek during the drawing process is not provided.
  • the arrangement according to the invention has the advantage over the known devices that various known systems are combined and optimized by means of new measures.
  • the invention provides that, on the one hand, the pressure cheek can be subjected to forces of different localities in any desired fine tuning, even during the entire drawing process, so that already this enables control or regulation of the application of force to the sheet metal holder by the known four-point control or regulation.
  • the counterforce on the sheet metal holder is additionally generated via height-adjustable bolts, which are supported on the pressure cheek, the bolts being distributed over the entire surface of the sheet metal holder and, depending on the required number, supporting the sheet metal holder from below.
  • the invention provides that the bolts provided with an additional drive in their vertical travel are program-controlled.
  • the bolts are therefore not inserted according to their required length, but are inserted vertically in a program-controlled manner using a separate drive.
  • the drive is preferably designed as a mechanically adjustable quill, which is connected to the pressure cheek.
  • a force sensor is provided, which detects the required supporting force per bolt, whereby each bolt movement can be force-controlled by means of a travel infeed. For this purpose, a distance measurement is provided on each bolt.
  • the drawing device 1 in a press serves for drawing a sheet metal part 2.
  • the press has a tool upper part 3 designed as a plunger 3 and vertically movable and a tool lower part 5 resting on a stationary press table 4 and designed as a punch 5.
  • the drawing punch 5 is surrounded by a one-part or multi-part drawing frame 6 designed as a sheet metal holder 6, which fixes the sheet metal part 2 together with the associated circumferential edge of the drawing ram 3 during the forming process.
  • the sheet metal holder 6 is non-positively connected to a pressure cheek 8 via a plurality of pressure bolts 7.
  • the rectangular pressure cheek 8 also called die cushion, is supported in its four corner areas by piston rods 9 of a pressure unit 11 which can be regulated by means of a proportional valve 10 and is adjustable in height.
  • a pressure cylinder 12 with a pressure piston 13 is provided, wherein each of the four pressure units 11 (see FIG. 2) can be regulated individually and independently of one another.
  • the pressure cheek 8 can be subjected to forces of different localities in any desired fine tuning and can thus be adjusted to different heights in the corner regions. This arrangement of the pressure cheek control is explained in DE 32 42 705 C2 of the applicant.
  • the counterforce required between the sheet holder 6 and the ram 3 when the sheet metal part 2 is being drawn is therefore first applied to the pressure cheek 8 by the pressure regulating device 11 accomplished.
  • This so-called four-point control is carried out in such a way that the pressure cheek 8, on which the sheet metal holder 6 is supported by bolts 7, can be individually adjusted in terms of its height adjustment in its four corner regions, the printing units 11 being the pressure / Path-controllable or adjustable lifting cylinders are formed.
  • a rear side member 18 of a car is shown in dashed lines, which would be insufficiently supported in the obliquely hatched area 19, 19 'by a four-point support of the printing units 11.
  • the invention provides, as shown in FIG. 2, that the press table 4 is provided with a close-meshed matrix network with through holes 14 for the bolts 7, which support the sheet metal holder 6 in many ways. As a result, the sheet metal holder 6 can lie very closely against the drawing die 5 and support the sheet metal part directly adjacent to the drawing die.
  • the press table 4 shown in plan view in FIG. 2 therefore contains a close-meshed network of through holes 14 for the pressure bolts 7, which surround the die 5 in a tight fit.
  • all bolts 7 are provided with an additional drive 15, which ensures that the respective bolt 7 can be moved vertically.
  • the bolts 7 on which the sheet metal holder 6 is supported are accordingly not plugged in as usual, but can be extended or retracted depending on the shape of the tool.
  • a displacement sensor 16 is provided on each bolt 7 or on each drive unit 15, which detects the extended bolt length very precisely.
  • each bolt 7 is additionally provided with a force sensor 17 which enables a force-controlled displacement of the individual bolts 7.
  • the force sensor 17 can be arranged between the drive 15 and the pressure cheek 8. In this way, a possible "digging" of a bolt 7 into the sheet metal holder or into the pressure cheek 8 is avoided in connection with the displacement measuring device 16.
  • a possible compression of the bolts 7 can also be detected and compensated for or avoided in good time.
  • the path infeed of each pin 7 when a certain force per pin is specified takes place in a control loop and is programmable by memory. In this way, based on the four-point pressure-displacement control or regulation, a tool-compatible point support with force control or regulation per bolt can take place.
  • the drive for the bolt 7 can each be designed as a mechanically adjustable quill 20 on which the pressure bolt is supported.
  • a nut 21 is let into the pressure cheek 8, in which the quill 20 with the thread 22 moves in a height-adjustable manner.
  • the sleeve is adjusted in the axial direction by motorized rotation of a splined shaft 23.
  • the exact position of the quill 20 is carried out by a controlled stepper motor 24 with a corresponding reduction gear.
  • the pressure sensor 17 ' can be arranged between the drive spindle 20 and the pressure bolt 7.
  • a hydraulic height adjustment of the pressure bolts can of course also be provided.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Press Drives And Press Lines (AREA)
EP91106194A 1990-04-23 1991-04-18 Dispositif pour emboutir des pièces de tôle dans une presse Expired - Lifetime EP0453955B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4012828 1990-04-23
DE4012828 1990-04-23

Publications (2)

Publication Number Publication Date
EP0453955A1 true EP0453955A1 (fr) 1991-10-30
EP0453955B1 EP0453955B1 (fr) 1994-03-23

Family

ID=6404862

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91106194A Expired - Lifetime EP0453955B1 (fr) 1990-04-23 1991-04-18 Dispositif pour emboutir des pièces de tôle dans une presse

Country Status (4)

Country Link
US (1) US5138857A (fr)
EP (1) EP0453955B1 (fr)
DE (1) DE59101219D1 (fr)
ES (1) ES2052298T3 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0510507A1 (fr) * 1991-04-20 1992-10-28 SCHULER PRESSEN GmbH & Co. Dispositif d'étirage dans la table d'une presse
EP0565347A2 (fr) * 1992-04-07 1993-10-13 Toyota Jidosha Kabushiki Kaisha Méthode et appareil pour mesurer la force de serre-flan agissant sur un anneau de pression d'une presse
US5457980A (en) * 1992-11-05 1995-10-17 Toyota Jidosha Kabushiki Kaisha Method and device for controlling, checking or optimizing pressure of cushion pin cylinders of press by discharging fluid or initial pressure
US5471861A (en) * 1993-04-28 1995-12-05 Toyota Jidosha Kabushiki Kaisha Method and apparatus for diagnosing press cushioning device, on optimum range of blank-holding force
EP0835699A2 (fr) * 1996-10-08 1998-04-15 Maschinenfabrik J. Dieffenbacher GmbH & Co. Dispositif d'emboutissage profond hydraulique
EP2759355A1 (fr) * 2013-01-24 2014-07-30 Aida Engineering, Ltd. Appareil de coussin élastique d'une presse et procédé de commande de coussin élastique

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5419169A (en) * 1992-04-07 1995-05-30 Toyota Jidosha Kabushiki Kaisha Method and apparatus for adjusting press operating conditions depending upon dies used
SE500250C2 (sv) * 1993-04-19 1994-05-24 Ap & T Tranemo Ab Hydraulpress för djupdragning
EP0675419B1 (fr) * 1994-03-31 1999-05-26 Toyota Jidosha Kabushiki Kaisha Méthode et appareil d'optimisation des conditions de fonctionnement d'une presse basé sur l'environnement de fonctionnement de la presse et/ou l'état du flan
NL1004193C2 (nl) * 1996-04-01 1997-10-02 Sjoerd Meijer Werkwijze voor het bewerken van metaalplaat.
DE19702636A1 (de) * 1997-01-25 1998-07-30 Erhard Reitter Werkzeug zum Ziehen von Blechformteilen
US5941110A (en) * 1997-05-12 1999-08-24 Northern University Adaptive method and apparatus for forming tailor welded blanks
DE19837083A1 (de) * 1998-08-17 2000-02-24 Volkswagen Ag Karosseriebauteil für die Karosserie eines Kraftfahrzeugs
DE19953860A1 (de) * 1999-11-09 2001-05-17 Fraunhofer Ges Forschung Tiefziehpresse und Verfahren zum Tiefziehen von Blechwerkstücken
JP2002224897A (ja) * 2001-02-02 2002-08-13 Komatsu Ltd ダイクッション装置
DE102004049149A1 (de) * 2004-10-07 2006-04-13 Feintool International Management Ag Verfahren und Vorrichtung zum Herstellen und/oder Bearbeitung von Teilen
JP4704047B2 (ja) * 2005-01-14 2011-06-15 株式会社小松製作所 ダイクッション装置
JP2008542026A (ja) * 2005-05-04 2008-11-27 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ 高精度を有する大きい力の押込加工装置
US7387006B1 (en) * 2006-12-12 2008-06-17 Ford Motor Company Sensing system for sheet metal forming tool
US8511400B2 (en) 2010-04-05 2013-08-20 Schlumberger Technology Corporation Apparatus and method for acoustic measurements while using a coring tool
US9931684B2 (en) 2014-04-18 2018-04-03 Honda Motor Co., Ltd. Forming die and method of using the same
US10105742B2 (en) 2014-12-09 2018-10-23 Honda Motor Co., Ltd. Draw press die assembly and method of using the same
JP6002205B2 (ja) * 2014-12-26 2016-10-05 アイダエンジニアリング株式会社 クッションパッドの傾き確認装置及び方法
US11370014B2 (en) * 2016-09-26 2022-06-28 Sharif University Of Technology System and method for passive pin positioning and locking for reconfigurable forming dies
US10786842B2 (en) 2018-09-12 2020-09-29 Fca Us Llc Draw-in control for sheet drawing
JP6670409B1 (ja) * 2019-03-11 2020-03-18 マレリ株式会社 プレス装置及びプレス方法
US11292047B2 (en) * 2019-05-03 2022-04-05 Ford Global Technologies Mechanical die pressure monitoring system

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0312809A2 (fr) * 1987-10-21 1989-04-26 Daimler-Benz Aktiengesellschaft Presse à double effet pour emboutir d'elements en tôle
EP0312808A2 (fr) * 1987-10-21 1989-04-26 Daimler-Benz Aktiengesellschaft Presse pour emboutir d'elements en tôle
DE3807683A1 (de) * 1988-03-09 1989-09-21 Schuler Gmbh L Ziehapparat in ziehstufen von pressen

Family Cites Families (10)

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Publication number Priority date Publication date Assignee Title
US2040731A (en) * 1929-01-02 1936-05-12 Hydraulic Press Corp Inc Hydraulic metal drawing press and method for shaping metal articles
DE1040488B (de) * 1952-08-04 1958-10-09 Weingarten Ag Maschf Presslufteinrichtung fuer Blechziehpressen
DD102089A1 (fr) * 1973-02-28 1973-12-12
FR2502994A1 (fr) * 1981-04-01 1982-10-08 Aerospatiale Procede et dispositif de reglage automatique des poussoirs d'une presse d'emboutissage au moyen de verins a tige autobloquante
DE3170614D1 (en) * 1981-09-12 1985-06-27 Schuler Gmbh L Deep-drawing arrangement for presses with mechanically driven drawing punch
DE3242705C2 (de) * 1982-11-19 1985-10-31 Maschinenfabrik Müller-Weingarten AG, 7987 Weingarten Im Pressentisch einer einfach wirkenden Ziehpresse angeordnete Drucklufteinrichtung
US4489584A (en) * 1982-12-02 1984-12-25 Hartup Tool, Inc. Single stroke, draw and trim die assembly
EP0173755B1 (fr) * 1984-06-29 1989-02-01 L. SCHULER GmbH Dispositif d'étirage dans une presse
DE3431162A1 (de) * 1984-08-24 1986-03-06 August Läpple GmbH & Co, 7100 Heilbronn Insbesondere fuer zieh- und tiefziehoperationen zu verwendende presse
DE3915795C1 (fr) * 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
EP0312809A2 (fr) * 1987-10-21 1989-04-26 Daimler-Benz Aktiengesellschaft Presse à double effet pour emboutir d'elements en tôle
EP0312808A2 (fr) * 1987-10-21 1989-04-26 Daimler-Benz Aktiengesellschaft Presse pour emboutir d'elements en tôle
DE3807683A1 (de) * 1988-03-09 1989-09-21 Schuler Gmbh L Ziehapparat in ziehstufen von pressen

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0510507A1 (fr) * 1991-04-20 1992-10-28 SCHULER PRESSEN GmbH & Co. Dispositif d'étirage dans la table d'une presse
EP0699899A2 (fr) * 1992-04-07 1996-03-06 Toyota Jidosha Kabushiki Kaisha Appareil de mesure de la force de serre-flan agissant sur un anneau de pression d'une presse
EP0565347A3 (en) * 1992-04-07 1993-12-08 Toyota Motor Co Ltd Apparatus for measuring blank holding force acting on pressure ring of a press
US5361615A (en) * 1992-04-07 1994-11-08 Toyota Jidosha Kabushiki Kaisha Apparatus for measuring blank holding force acting on pressure ring of a press
EP0565347A2 (fr) * 1992-04-07 1993-10-13 Toyota Jidosha Kabushiki Kaisha Méthode et appareil pour mesurer la force de serre-flan agissant sur un anneau de pression d'une presse
EP0699899A3 (fr) * 1992-04-07 1998-07-22 Toyota Jidosha Kabushiki Kaisha Appareil de mesure de la force de serre-flan agissant sur un anneau de pression d'une presse
US5457980A (en) * 1992-11-05 1995-10-17 Toyota Jidosha Kabushiki Kaisha Method and device for controlling, checking or optimizing pressure of cushion pin cylinders of press by discharging fluid or initial pressure
US5471861A (en) * 1993-04-28 1995-12-05 Toyota Jidosha Kabushiki Kaisha Method and apparatus for diagnosing press cushioning device, on optimum range of blank-holding force
EP0835699A3 (fr) * 1996-10-08 1998-05-13 Maschinenfabrik J. Dieffenbacher GmbH & Co. Dispositif d'emboutissage profond hydraulique
EP0835699A2 (fr) * 1996-10-08 1998-04-15 Maschinenfabrik J. Dieffenbacher GmbH & Co. Dispositif d'emboutissage profond hydraulique
US5979211A (en) * 1996-10-08 1999-11-09 Maschinenfabrik J. Dieffenbacher Gmbh & Co. Hydraulic deep drawing apparatus
EP2759355A1 (fr) * 2013-01-24 2014-07-30 Aida Engineering, Ltd. Appareil de coussin élastique d'une presse et procédé de commande de coussin élastique
US9808848B2 (en) 2013-01-24 2017-11-07 Aida Engineering, Ltd. Die cushion apparatus of press machine and die cushion controlling method
EP3330017A1 (fr) * 2013-01-24 2018-06-06 Aida Engineering, Ltd. Appareil de coussin élastique d'une presse et procédé de commande de coussin élastique
US10363594B2 (en) 2013-01-24 2019-07-30 Aida Engineering, Ltd. Die cushion apparatus of press machine and die cushion controlling method

Also Published As

Publication number Publication date
EP0453955B1 (fr) 1994-03-23
DE59101219D1 (de) 1994-04-28
ES2052298T3 (es) 1994-07-01
US5138857A (en) 1992-08-18

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