WO2006094485A1 - Ensemble coussin d'emboutissage a entrainement par commande numerique et a coussin hydraulique - Google Patents

Ensemble coussin d'emboutissage a entrainement par commande numerique et a coussin hydraulique Download PDF

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Publication number
WO2006094485A1
WO2006094485A1 PCT/DE2006/000395 DE2006000395W WO2006094485A1 WO 2006094485 A1 WO2006094485 A1 WO 2006094485A1 DE 2006000395 W DE2006000395 W DE 2006000395W WO 2006094485 A1 WO2006094485 A1 WO 2006094485A1
Authority
WO
WIPO (PCT)
Prior art keywords
die cushion
cushion device
pressure
hydraulic pad
hydraulic
Prior art date
Application number
PCT/DE2006/000395
Other languages
German (de)
English (en)
Inventor
Rainer Reichenbach
Original Assignee
Müller 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 Müller Weingarten AG filed Critical Müller Weingarten AG
Priority to JP2008500042A priority Critical patent/JP5129731B2/ja
Publication of WO2006094485A1 publication Critical patent/WO2006094485A1/fr

Links

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
    • 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
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/20—Deep-drawing
    • B21D22/22—Deep-drawing with devices for holding the edge of the blanks
    • 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

Definitions

  • the invention relates to a die cushion device for a forming press according to the preamble of claim 1.
  • the EP 10 82 185 Bl discloses a deep-drawing press with driven by threaded spindle and spindle nut press ram and die cushion.
  • the movement of the die cushion is achieved in this embodiment exclusively by electronic drives, which are connected via spindle nut and threaded spindle with the pressure cheek. All drives are coupled without slip.
  • a disadvantage is certainly that the electric drives for the die cushion are coupled together.
  • Today's requirements, in particular the automotive industry to a forming press require a variable pressure distribution on the pressure cheek. This is prevented by the coupling of the drives.
  • the movement of the die cushion is synchronized via electrical waves on the one hand between the plunger and the die cushion and on the other hand between a plurality of servomotors belonging to the die cushion.
  • the required pulling force can be tense by changing the engine torque during the deep drawing process.
  • the device required for this purpose and the process steps required for the control are not disclosed. In principle, come to control such devices two different variants in question, a force-dependent and a path-dependent control.
  • the cushion force is detected by a pressure transducer for each pad pressure point.
  • the force transducers can be, for example, piezoelectric or resistive strain transducers.
  • the cushion force can be detected indirectly via the motor current of the servomotors. The determined forces are then compared with stored force setpoint values via an NC control device and the servomotors are correspondingly controlled.
  • a controller calculates a so-called electronic position cam, which includes the desired course of the pad position as a function of the plunger position.
  • the position cam is stored in the form of a table, a mathematical function or a combination of both in the controller.
  • the cushion position is influenced by a position control, which receives its setpoint from the position cam disc read out according to the current ram position. The movement of the ram continuously transfers position setpoints to a position controller.
  • the servomotor controlled via a power amplifier and the actively connected pressure plate follow the position cam.
  • the invention has for its object to develop starting from the prior art, a die cushion device with NC-controlled electric drives, which allows a path-dependent control of the pulling force.
  • a die cushion device with NC-controlled electric drives which allows a path-dependent control of the pulling force.
  • the possibility of overload protection of the die cushion device is to be created. In particular, this should be realized with the least possible construction costs.
  • the invention is based on the core idea, in the motion transmission chain, motor, threaded spindle, spindle nut and pressure cheek, a hydraulic pad which is able to absorb and compensate for impacts and control inaccuracies.
  • this hydraulic pad is located between the spindle nut and the pressure cheek and consists of a cylindrical cavity, which is designed as a piston ring surface.
  • a fluid which communicates via a hydraulic line with a pressure accumulator in communication and is pressurized.
  • This pressure can be changed via a suitable pressure setting.
  • the die cushion is pre-accelerated before placing the upper tool on the blank holder so that the relative speed between the upper tool and blank holder is minimized.
  • This acts as a shock pulse to the die cushion device, including all drive elements, resulting in a reduction in the life of the corresponding components. But if, as in the die cushion device according to the invention, a hydraulic cushion between the pressure cheek and spindle nut present, this can compensate for these shocks.
  • the die cushion device according to the invention causes an improvement in the life of all drive components.
  • the hydraulic cushion according to the invention in the motion transmission chain described above at a different location is, for example, between the drive bearing and a support which is firmly connected to the press table.
  • the die-cushion device according to the invention can also with a Overload protection can be provided.
  • the hydraulic pad is connected to a pressure relief valve.
  • This pressure relief valve allows a quick spraying of the hydraulic poster at a specifiable and adjustable pressure. This set value is such that both a normal die cushion operation is possible, and the components of the die cushion device are protected from damage or destruction by overload.
  • the size of the oil pads must be sized so that the press has enough time to come to a standstill.
  • the hydraulic pad can also be replaced by a pneumatic cushion or an element made of permanently elastic material. If an element made of permanently elastic material is used, it is possible to influence or adjust the elasticity by pretensioning.
  • the pressure in the hydraulic cushion not only preset as described above, but also controlled or regulated.
  • the path-dependent control of the servomotors can thereby be superimposed with a pressure or force-dependent control via the hydraulic cushion.
  • Figure 1 is a schematic representation of the forming press with die cushion
  • Figure 2 is a schematic representation of the die cushion device
  • Figure 3 is a detail view of the threaded spindle with spindle nut and hydraulic pad
  • Figure 1 shows a schematic representation of a forming press 19. Showing the ram 20, the upper and lower tools 21, 22 and the blank holder 23. The blank holder 23 is via pressure pins 24 operatively connected to the die cushion. 1 shows an enlarged view of the die cushion 1 FIG. 2.
  • Figure 2 shows a schematic representation of the table area of a forming press with the die cushion device according to the invention 1. You can see parts of the stand 2, the tie rods 3 and the table 4.
  • the die cushion device 1 is in the lower area on the drive bearing 5 and the support 6 firmly connected to the table 4.
  • the drive bearing 5 serves to receive the servomotor 7 with the threaded spindle 8 attached thereto.
  • the threaded spindle 8 is in operative connection with the spindle nut 9, which in turn is connected via a receptacle 10 to the pressure cheek 11.
  • the spindle nut 9 By turning the threaded spindle 8 by means of the stationary servo motor 7 thus the spindle nut 9, the receptacle 10 and ultimately the pressure cheek 11 is moved vertically. During this movement, the pressure cheek 11 is guided by means of the guide 12 in the table 4. Immediately before the drawing process, before the Upper tool touches on the sheet holder, not shown here, the pressure cheek 11, which is in operative connection with the sheet holder, partly inquiret in the direction of arrow 13. In general, the blank holder is pre-accelerated by the die cushion so that when placing the
  • the relative speed to the blank holder is about 10 - 15% of the absolute speed of the upper tool. This relative speed results in touchdown on a shock pulse, which is transmitted via the pressure cheek 11 on the receptacle 10.
  • this shock pulse is not forwarded as in known solutions of the receptacle 10 directly to the spindle nut 9 and thus also on the threaded spindle 8, but on a hydraulic pad 14.
  • FIG. 3 the arrangement of the hydraulic pad 14 is shown in more detail.
  • the spindle nut 9 is fixedly connected to an intermediate piece 15.
  • the intermediate piece 15 fulfills the object of a rotation for the spindle nut 9.
  • Between the receptacle 10 and the intermediate piece 15 is a cavity, which is filled in this embodiment with a fluid. This fluid-filled cavity, the hydraulic cushion according to the invention is over a
  • Hydraulic line 16 is connected to a pressure accumulator 17.
  • the prevailing pressure can be preselected or changed by means of a pressure adjustment fitting 18.
  • the invention is not limited to the illustrated and described embodiment. It also includes all expert training in the context of the inventive concept.
  • the accumulator 17 and the Druckeinstellarmatur 18 are replaced by a pressure control loop.
  • Another variant would be the hydraulic pad 14 equipped with a pressure relief valve so as to realize an overload protection.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Presses And Accessory Devices Thereof (AREA)

Abstract

Ensemble (1) coussin d'emboutissage, dans lequel le mouvement et l'exposition à une pression du coussin d'emboutissage (11) se produisent à l'aide de moyens d'entraînement électromoteurs (7) et dans lequel un coussin hydraulique (14) est situé entre l'écrou (9) de broche et le coussin d'emboutissage (11).
PCT/DE2006/000395 2005-03-07 2006-03-06 Ensemble coussin d'emboutissage a entrainement par commande numerique et a coussin hydraulique WO2006094485A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2008500042A JP5129731B2 (ja) 2005-03-07 2006-03-06 Ｎｃ駆動装置と液圧パッドを装備したダイクッション

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005010824 2005-03-07
DE102005010824.5 2005-03-07

Publications (1)

Publication Number Publication Date
WO2006094485A1 true WO2006094485A1 (fr) 2006-09-14

Family

ID=36579381

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2006/000395 WO2006094485A1 (fr) 2005-03-07 2006-03-06 Ensemble coussin d'emboutissage a entrainement par commande numerique et a coussin hydraulique

Country Status (3)

Country Link
JP (1) JP5129731B2 (fr)
ES (1) ES2331277B2 (fr)
WO (1) WO2006094485A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1862236A1 (fr) * 2006-05-31 2007-12-05 Schuler Pressen GmbH & Co. KG Dispositif de serre-flans actionné par vérins à vis et comportant des paliers hydrostatiques
WO2008064669A2 (fr) * 2006-11-30 2008-06-05 Müller Weingarten AG Dispositif de coussin hydraulique à entraînement hybride
JP2009279620A (ja) * 2008-05-22 2009-12-03 Komatsu Ltd ダイクッション装置

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140102630A1 (en) * 2010-09-28 2014-04-17 Tsung-Han Tsai Multi-surface appliqueing method for melamine container

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0417752A2 (fr) * 1989-09-12 1991-03-20 Maschinenfabrik Müller-Weingarten AG Presse mécanique ou hydraulique avec dispositif d'étirage ou d'emboutissage pour presse à plusieurs étapes
DE4100716A1 (de) * 1991-01-14 1992-07-16 Erfurt Umformtechnik Gmbh Einrichtung zum blechhalten in einfachwirkenden pressen
EP0635320A1 (fr) * 1993-07-24 1995-01-25 Umformtechnik ERFURT GmbH Serre-flan pour presses à simple effet en particulier pour presses mécaniques et presses de transfert
EP1082185B1 (fr) * 1998-05-12 2002-03-27 Johannes Hülshorst Presse d'emboutissage profond comportant un mouton et un coussin d'emboutissage entraines par des broches filetees et des ecrous de broche
DE102005026100A1 (de) * 2004-06-01 2006-03-09 Komatsu Ltd. Ziehkissenvorrichtung

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59120022U (ja) * 1983-01-28 1984-08-13 株式会社小松製作所 プレスのダイクツシヨン装置
JPS61115627A (ja) * 1984-11-10 1986-06-03 Aida Eng Ltd ダイクツシヨン
JPH0666900U (ja) * 1993-02-10 1994-09-20 株式会社南雲製作所 プレス装置
JP2006055872A (ja) * 2004-08-18 2006-03-02 Komatsu Ltd ダイクッション装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0417752A2 (fr) * 1989-09-12 1991-03-20 Maschinenfabrik Müller-Weingarten AG Presse mécanique ou hydraulique avec dispositif d'étirage ou d'emboutissage pour presse à plusieurs étapes
DE4100716A1 (de) * 1991-01-14 1992-07-16 Erfurt Umformtechnik Gmbh Einrichtung zum blechhalten in einfachwirkenden pressen
EP0635320A1 (fr) * 1993-07-24 1995-01-25 Umformtechnik ERFURT GmbH Serre-flan pour presses à simple effet en particulier pour presses mécaniques et presses de transfert
EP1082185B1 (fr) * 1998-05-12 2002-03-27 Johannes Hülshorst Presse d'emboutissage profond comportant un mouton et un coussin d'emboutissage entraines par des broches filetees et des ecrous de broche
DE102005026100A1 (de) * 2004-06-01 2006-03-09 Komatsu Ltd. Ziehkissenvorrichtung

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1862236A1 (fr) * 2006-05-31 2007-12-05 Schuler Pressen GmbH & Co. KG Dispositif de serre-flans actionné par vérins à vis et comportant des paliers hydrostatiques
WO2008064669A2 (fr) * 2006-11-30 2008-06-05 Müller Weingarten AG Dispositif de coussin hydraulique à entraînement hybride
WO2008064669A3 (fr) * 2006-11-30 2008-08-14 Mueller Weingarten Maschf Dispositif de coussin hydraulique à entraînement hybride
JP2009279620A (ja) * 2008-05-22 2009-12-03 Komatsu Ltd ダイクッション装置

Also Published As

Publication number Publication date
JP5129731B2 (ja) 2013-01-30
JP2008531294A (ja) 2008-08-14
ES2331277B2 (es) 2010-09-24
ES2331277A1 (es) 2009-12-28

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