EP1097801A1 - Piezoelektrischer Pressenantrieb mit hydraulischer Übertragungsanordnung - Google Patents

Piezoelektrischer Pressenantrieb mit hydraulischer Übertragungsanordnung Download PDF

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Publication number
EP1097801A1
EP1097801A1 EP00123428A EP00123428A EP1097801A1 EP 1097801 A1 EP1097801 A1 EP 1097801A1 EP 00123428 A EP00123428 A EP 00123428A EP 00123428 A EP00123428 A EP 00123428A EP 1097801 A1 EP1097801 A1 EP 1097801A1
Authority
EP
European Patent Office
Prior art keywords
die
piezoactor
transmission device
press according
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.)
Withdrawn
Application number
EP00123428A
Other languages
English (en)
French (fr)
Inventor
Achim Hess
Martin Gollhofer
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.)
Zfs Zentrum Fertigungstechnik Stuttgart Stiftung Des Offentlichen Rechts
ITT Manufacturing Enterprises LLC
Original Assignee
Zfs Zentrum Fertigungstechnik Stuttgart Stiftung Des Offentlichen Rechts
ITT Manufacturing Enterprises LLC
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 Zfs Zentrum Fertigungstechnik Stuttgart Stiftung Des Offentlichen Rechts, ITT Manufacturing Enterprises LLC filed Critical Zfs Zentrum Fertigungstechnik Stuttgart Stiftung Des Offentlichen Rechts
Publication of EP1097801A1 publication Critical patent/EP1097801A1/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B1/00—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen
    • B30B1/007—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen using a fluid connection between the drive means and the press ram
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B1/00—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen

Definitions

  • the invention relates to a press, more particularly for cutting and moulding miniature components, with a reciprocating die.
  • a press more particularly for cutting and moulding miniature components, with a reciprocating die in that the drive of the die is effected by at least one piezoactor and in that a more particularly hydraulic transmission device is arranged between the piezoactor and the die.
  • the piezoactor offers the advantage that it has practically no moving mass as compared with a mechanical drive. Consequently, it is possible to attain very high velocities and accelerations using the press according to the invention. Using conventional presses, it is possible to manufacture approximately 2000 parts per unit of time. Using the press according to the invention, markedly increased frequencies and therefore quantities can be realised.
  • the use of the piezoactor allows for the representation of any chosen force/displacement profile. In contrast, it is only possible to represent a sinusoidal force/displacement profile using conventional mechanical presses with crank drives.
  • the transmission device is used in order to allow for larger displacement distances of the die.
  • the transmission device is preferably a hydraulic transmission device, since mechanical transmissions usually have a clearance which is too great for precision processing in the micrometer range.
  • a particular embodiment of the invention is characterised in that the transmission device comprises a double-action transmission piston, which is arranged between the piezoactor and the die.
  • the transmission device comprises a double-action transmission piston, which is arranged between the piezoactor and the die.
  • both the forward and the backward movement (pressure and traction) of the piezoactor is transmitted to the transmission piston. This offers the advantage that no restoring device is required for the transmission piston.
  • a further particular embodiment of the invention is characterised in that the die is accommodated with clearance in a first coupling half, which is prestressed with a second coupling half.
  • the coupling serves to compensate any possible displacement which may occur during the assembly of the press according to the invention. This offers the advantage that larger tolerances can be allowed in the case of the tool, which has a favourable effect on manufacturing costs.
  • a further particular embodiment of the invention is characterised in that a plurality of piezoactors actuated in parallel, more particular in modular form, is coupled with the transmission device.
  • This offers the advantage that it is also possible to realise large displacement distances using the press according to the invention.
  • the modular construction of the press allows for rapid adaptation of the press to different product settings.
  • a further particular embodiment of the invention is characterised in that a force sensor is connected to the piezoactor, which force sensor is connected to a control, which is connected to the voltage supply of the piezoactor.
  • a force sensor is connected to the piezoactor, which force sensor is connected to a control, which is connected to the voltage supply of the piezoactor.
  • the force sensor it is possible to continuously measure the force required for the processing operation. If the force increases during operation, this may mean that the tool is worn and needs to be replaced.
  • the press according to the invention it is possible to monitor tool wear. In this manner, undesirable die breakage can be prevented.
  • it is possible using the press according to the invention to vary the die force in a controlled manner via the voltage supply of the piezoactor. It is therefore possible to intervene in a controlled manner in the pressing procedure. It is thereby possible, for example, to process different materials or material thicknesses using the same tool.
  • a further particular embodiment of the invention is characterised in that a motion pickup is connected to the die, which motion pickup is connected to a control, which is connected to the voltage supply of the piezoactor.
  • a motion pickup is connected to the die, which motion pickup is connected to a control, which is connected to the voltage supply of the piezoactor.
  • a further particular embodiment of the invention is characterised in that the control and the voltage supply of the piezoactor are connected to a function generator.
  • the function generator it is possible to influence the voltage supply of the piezoactor in a controlled manner. Consequently, it is possible to preset any chosen force/displacement profile.
  • the press shown in section in Figure 1 comprises a base plate 1. Fitted to the base plate 1 is a plurality of columns 2, 3. The columns 2, 3 are used for securing a displaceable tool receiving plate 4.
  • a pressure plate 5 Arranged on the tool receiving plate 4 is a pressure plate 5.
  • a tool unit 6 is disposed on the pressure plate 5.
  • the tool unit 6 is formed by a lower tool half 7 and an upper tool half 8.
  • a die 9 is axially displaceably guided in the upper tool half 8.
  • the end of the die 9 remote from the lower tool half 7 is accommodated with clearance in a lower coupling half 10.
  • the lower coupling half 10 cooperates with an upper coupling half 11, in order to couple the die 9 with a push rod 12.
  • the push rod 12 is displaceably guided in a base plate 13 and projects with its end remote from the die 9 into a hydraulic transmission device 14.
  • the base plate 13 belongs to the hydraulic transmission device 14 and is supported by the columns 2, 3.
  • the hydraulic transmission device 14 is used to transmit the movement of two piezoactors 18, 19 via two transmission pistons 20, 21 and a suitable hydraulic fluid to the push rod 12.
  • the transmission pistons 20, 21 are constructed in three parts in order to allow for the securing of sealing rings in their centre.
  • the pistons 20 and 21 are accommodated in cylinder chambers 26, 27 in a housing base element 22 so as to reciprocate and are coupled with the piezoactors 18, 19.
  • a hydraulic fluid duct 23 provides a connection between the end face of the pistons 20, 21 remote from the piezoactors and the push rod 12.
  • Constructed on the push rod 12 is a first collar 24, which is acted upon by the hydraulic pressure on the side remote from the tool.
  • a second collar 25 is constructed on the push rod 12. On the side remote from the first collar 24, the second collar 25 communicates via ducts 28, 29 with the end faces of the pistons 20, 21 facing the piezoactors. Hydraulic fluid is disposed in the cylinder chambers 26, 27.
  • the block diagram illustrated in Figure 2 shows how the press illustrated in Figure 1 is controlled during operation.
  • the displacement movement of the die 9 is recorded with the aid of a motion pickup.
  • the piezoactors 18, 19, which are also referred to as piezo operators are equipped with force sensors.
  • the motion pickup and the force sensors supply their measurement values to a control, which communicates with a function generator and the voltage supply of the piezo operators.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Press Drives And Press Lines (AREA)
EP00123428A 1999-11-04 2000-11-02 Piezoelektrischer Pressenantrieb mit hydraulischer Übertragungsanordnung Withdrawn EP1097801A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19953244 1999-11-04
DE1999153244 DE19953244A1 (de) 1999-11-04 1999-11-04 Presse

Publications (1)

Publication Number Publication Date
EP1097801A1 true EP1097801A1 (de) 2001-05-09

Family

ID=7928002

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00123428A Withdrawn EP1097801A1 (de) 1999-11-04 2000-11-02 Piezoelektrischer Pressenantrieb mit hydraulischer Übertragungsanordnung

Country Status (2)

Country Link
EP (1) EP1097801A1 (de)
DE (1) DE19953244A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1602472A1 (de) 2004-06-02 2005-12-07 SMS Meer GmbH Vorrichtung und Verfahren zum Herstellen eines Pulverpresskörpers
DE102005027032A1 (de) * 2005-06-11 2006-12-28 Sms Meer Gmbh Vorrichtung zum Herstellen eines Formteils

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE20209561U1 (de) 2002-06-19 2002-09-26 Messner, Antje, 78647 Trossingen Fertigungswerkzeug mit Säulengestell
DE102007050578B4 (de) * 2007-10-20 2016-02-18 Hofer Forschungs- Und Entwicklungs Gmbh Getriebeaktuator und Getriebe

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60177897A (ja) * 1984-02-24 1985-09-11 日本電信電話株式会社 圧電式穿孔装置
JPS63286299A (ja) * 1987-05-19 1988-11-22 Komatsu Ltd プレス機の制御装置
CH671187A5 (en) * 1986-12-23 1989-08-15 Autophon Ascom Ag Sheet stamping machine - with electromagnetic drive made of piezoelectric stack controlled by a pulsed voltage
US5095725A (en) * 1989-05-12 1992-03-17 Fuji Electric Co., Ltd. Press and actuator using piezoelectric element
US5138217A (en) * 1989-05-12 1992-08-11 Fuji Electric Co., Ltd. Driving power unit for piezoactuator system and method
JPH11179600A (ja) * 1997-12-16 1999-07-06 Uht Corp パンチプレス

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19705893A1 (de) * 1997-02-15 1998-08-20 Wasmuth Thomas Dipl Ing Modulare Stelleinheit auf Basis von Festkörperaktoren für den Einsatz in fluidtechnischen Steuerungen

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60177897A (ja) * 1984-02-24 1985-09-11 日本電信電話株式会社 圧電式穿孔装置
CH671187A5 (en) * 1986-12-23 1989-08-15 Autophon Ascom Ag Sheet stamping machine - with electromagnetic drive made of piezoelectric stack controlled by a pulsed voltage
JPS63286299A (ja) * 1987-05-19 1988-11-22 Komatsu Ltd プレス機の制御装置
US5095725A (en) * 1989-05-12 1992-03-17 Fuji Electric Co., Ltd. Press and actuator using piezoelectric element
US5138217A (en) * 1989-05-12 1992-08-11 Fuji Electric Co., Ltd. Driving power unit for piezoactuator system and method
JPH11179600A (ja) * 1997-12-16 1999-07-06 Uht Corp パンチプレス

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 013, no. 094 (M - 804) 6 March 1989 (1989-03-06) *
PATENT ABSTRACTS OF JAPAN vol. 1999, no. 12 29 October 1999 (1999-10-29) *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1602472A1 (de) 2004-06-02 2005-12-07 SMS Meer GmbH Vorrichtung und Verfahren zum Herstellen eines Pulverpresskörpers
US7150851B2 (en) 2004-06-02 2006-12-19 Sms Meer Gmbh Powder press
DE102005027032A1 (de) * 2005-06-11 2006-12-28 Sms Meer Gmbh Vorrichtung zum Herstellen eines Formteils
DE102005027032B4 (de) * 2005-06-11 2007-06-28 Sms Meer Gmbh Vorrichtung zum Herstellen eines Formteils

Also Published As

Publication number Publication date
DE19953244A1 (de) 2001-05-17

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