EP0967028A3 - Hydraulic press - Google Patents

Hydraulic press Download PDF

Info

Publication number
EP0967028A3
EP0967028A3 EP99890056A EP99890056A EP0967028A3 EP 0967028 A3 EP0967028 A3 EP 0967028A3 EP 99890056 A EP99890056 A EP 99890056A EP 99890056 A EP99890056 A EP 99890056A EP 0967028 A3 EP0967028 A3 EP 0967028A3
Authority
EP
European Patent Office
Prior art keywords
hydraulic
suction line
hydraulic press
effective area
larger effective
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
EP99890056A
Other languages
German (de)
French (fr)
Other versions
EP0967028A2 (en
EP0967028B1 (en
Inventor
Martin Dipl.Ing. Rauwolf
Thomas Holderried
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.)
Hoerbiger Hydraulik GmbH
Original Assignee
Hoerbiger Hydraulik GmbH
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 Hoerbiger Hydraulik GmbH filed Critical Hoerbiger Hydraulik GmbH
Publication of EP0967028A2 publication Critical patent/EP0967028A2/en
Publication of EP0967028A3 publication Critical patent/EP0967028A3/en
Application granted granted Critical
Publication of EP0967028B1 publication Critical patent/EP0967028B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/02—Bending sheet metal along straight lines, e.g. to form simple curves on press brakes without making use of clamping means

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Presses (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Press Drives And Press Lines (AREA)

Abstract

Eine hydraulische Presse weist einen zweiseitig wirkenden hydraulischen Arbeitszylinder (3) mit unterschiedlich großen Wirkflächen auf beiden Seiten des Kolbens (11) auf, wobei die Seite der größeren Wirkfläche über eine zusätzliche Nachsaugleitung (12) mit dem Hydrauliktank (13) verbunden und in diese Nachsaugleitung (12) ein Nachsaugventil (14) eingeschaltet ist, welches während des Arbeitshubes geschlossen und während der Eilhübe geöffnet ist. Um die innere hydraulische Steifigkeit des Systems zu erhöhen ist in der Nachsaugleitung (12) zusätzlich eine schaltbare Drossel (15) angeordnet, welche während des Ausschiebens von Hydraulikmedium aus der Zylinderseite mit größerer Wirkfläche zum Hydrauliktank (13) wirksam ist.

Figure 00000001
A hydraulic press has a double-acting hydraulic working cylinder (3) with different effective areas on both sides of the piston (11), the side of the larger effective area being connected to the hydraulic tank (13) via an additional suction line (12) and into this suction line (12) a suction valve (14) is switched on, which is closed during the working stroke and opened during the rapid strokes. In order to increase the internal hydraulic rigidity of the system, a switchable throttle (15) is also arranged in the suction line (12), which is effective when hydraulic fluid is pushed out from the cylinder side with a larger effective area to the hydraulic tank (13).
Figure 00000001
EP19990890056 1998-03-03 1999-02-17 Hydraulic press Expired - Lifetime EP0967028B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT37198A AT408851B (en) 1998-03-03 1998-03-03 HYDRAULIC PRESS
AT37198 1998-03-03

Publications (3)

Publication Number Publication Date
EP0967028A2 EP0967028A2 (en) 1999-12-29
EP0967028A3 true EP0967028A3 (en) 2002-12-04
EP0967028B1 EP0967028B1 (en) 2004-04-28

Family

ID=3488826

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19990890056 Expired - Lifetime EP0967028B1 (en) 1998-03-03 1999-02-17 Hydraulic press

Country Status (3)

Country Link
EP (1) EP0967028B1 (en)
AT (1) AT408851B (en)
DE (1) DE59909291D1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT410469B (en) * 2001-06-27 2003-05-26 Hoerbiger Hydraulik HYDRAULIC WORKING MACHINE
DE10350483B4 (en) * 2003-10-29 2005-09-22 Müller Weingarten AG Device for separating oil in hydraulic systems
AT505724B1 (en) * 2007-09-12 2010-06-15 Trumpf Maschinen Austria Gmbh DRIVE DEVICE FOR A BEND PRESS
DE102019209440B3 (en) 2019-06-28 2020-07-30 HAWE Altenstadt Holding GmbH Hydromechanical linear converter

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2542665A1 (en) * 1975-09-25 1977-05-05 Hartmann & Laemmle Kg Valve for shock free hydraulic decompression - has pressure switch controlling choke with regulator slide
US4307654A (en) * 1978-08-29 1981-12-29 Inter-Hydraulik Ag Filling and exhaust valve for the control of the hydraulic flow on presses and shears
JPH06320219A (en) * 1993-05-12 1994-11-22 Komatsu Ltd Hydraulic control circuit for press brake

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4658625A (en) * 1984-03-30 1987-04-21 Amada Company, Limited Bending machine and a die changing system for such bending machine
JPH072088Y2 (en) * 1988-11-15 1995-01-25 株式会社小松製作所 Tool position controller for bending machine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2542665A1 (en) * 1975-09-25 1977-05-05 Hartmann & Laemmle Kg Valve for shock free hydraulic decompression - has pressure switch controlling choke with regulator slide
US4307654A (en) * 1978-08-29 1981-12-29 Inter-Hydraulik Ag Filling and exhaust valve for the control of the hydraulic flow on presses and shears
JPH06320219A (en) * 1993-05-12 1994-11-22 Komatsu Ltd Hydraulic control circuit for press brake

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 1995, no. 02 31 March 1995 (1995-03-31) *

Also Published As

Publication number Publication date
DE59909291D1 (en) 2004-06-03
AT408851B (en) 2002-03-25
ATA37198A (en) 2001-08-15
EP0967028A2 (en) 1999-12-29
EP0967028B1 (en) 2004-04-28

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