EP0970803A1 - Presse hydraulique - Google Patents

Presse hydraulique Download PDF

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Publication number
EP0970803A1
EP0970803A1 EP99890215A EP99890215A EP0970803A1 EP 0970803 A1 EP0970803 A1 EP 0970803A1 EP 99890215 A EP99890215 A EP 99890215A EP 99890215 A EP99890215 A EP 99890215A EP 0970803 A1 EP0970803 A1 EP 0970803A1
Authority
EP
European Patent Office
Prior art keywords
cylinder
lines
hydraulic
control
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Withdrawn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
EP99890215A
Other languages
German (de)
English (en)
Inventor
Norbert Poth
Bernd Walter
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 EP0970803A1 publication Critical patent/EP0970803A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/20—Other details, e.g. assembly with regulating devices
    • F15B15/202—Externally-operated valves mounted in or on the actuator
    • 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
    • B30B1/32—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 by plungers under fluid pressure

Definitions

  • the invention relates to a hydraulic press, in particular a press brake, with a lower tool, one through the at least one working cylinder, especially its piston rod, essentially vertically movable Upper beam and control devices, at least part of the hydraulic Control devices in the cylinder bottom and / or the cylinder tube is integrated.
  • the lines are on these cylinders for the hydraulic medium connected by hydraulic control devices, especially the control valves for the workrooms of the Cylinder, going out.
  • a similar construction is also shown in the US PS 4,890,475. With such presses, however, there is a risk that in the case of defective ones Seals or sealing points, especially on the annulus side of the cylinder, a unintentional closing movement by lowering the upper cheek of the press and the workpiece or tool is damaged and the operating personnel at risk.
  • Knitting machines known, among other things one from the piston of the knitting cylinder too actuating control valve, but not the valves controlling the movement, in the knitting cylinder and a pressure oil line in the wall of this cylinder is integrated. Passively regulating the oil flow and the pressure conditions in the system Valves and lines are also on the hold-down device Deep drawing press according to DE 29 35 814 A provided, but not actively Motion control valves. About the exact execution and structure of the hydraulic cylinders themselves are not in the publications mentioned Notes available.
  • the object of the present invention was therefore a hydraulic one Press with increased security level, especially for high forces and for that necessary high pressures in the hydraulic system, at which the risk of injury of people working on the press and damage to the tool and of the workpiece is reduced.
  • This object is achieved in that at least the Housing for the control valves and the lines for the hydraulic medium from and to the working spaces of the working cylinder in the cylinder bottom and / or which are integrated in one piece with this cylinder tube.
  • the number of sealing points and seals is reduced, so that the risk of leaks and thus the escape of hydraulic medium, thus also uncontrollable Movement states are at least largely reduced.
  • the manufacturing and assembly costs are reduced, problems with the transmission of force between the cylinder tube and cylinder base avoided and can advantageously also be sealing points in the sense of the task Avoid between these parts of the working cylinder.
  • control block including Control valves and control lines coming from the external connections is integrated in the cylinder base, which increases the number of Lets reduce areas where leaks can occur. Leaks or breaks in the control lines are also essential Part prevented.
  • Preventing leaks or breaks in the lines for the Hydraulic medium are also the advantage for the further feature of the invention, that the lines for the hydraulic medium from and to the workrooms of the Working cylinders are integrated in the cylinder base and the cylinder barrel.
  • control lines and / or Lines for the hydraulic medium directly from the cylinder bottom or Cylinder tube worked out.
  • the housing for the control valves and / or the control lines and / or the lines for the hydraulic medium at least partially connecting and merge seamlessly into each other are the length of the hydraulic lines and the number of joints to be sealed Minimum reduced and the security of the press against leaks and resulting uncontrolled movements, especially the sinking the upper cheek, optimized.
  • the drawing figure shows a longitudinal section, partly schematically, of Working cylinder A of a hydraulic press, in particular a press brake, on an upper frame section (not shown) of the press is attached and the piston 1 or piston rod the upper cheek of the press (not shown) towards or under the tool moved up.
  • the piston 1 is replaced by a preferably liquid Pressure medium such as hydraulic oil in the housing 2 of the working cylinder A shifted.
  • the housing 2 is preferably designed such that the cylinder bottom and the cylinder tube are made in one piece.
  • the hydraulic oil enters the housing via a pressure connection 2 integrated line 3 and through this line 3 to a schematic illustrated directional valve 4, which for changing direction or for stopping the Piston 1 and thus the upper cheek of the press.
  • a schematic illustrated directional valve 4 which for changing direction or for stopping the Piston 1 and thus the upper cheek of the press.
  • It can be digital or proportional switching directional valve designed and preferably also in the housing 2 integrated switching lines can be supplied.
  • Directional control valve 4 in the drawing as advantageously integrated into the housing 2 is shown, it could also be placed on the outside of the working cylinder his. In the position shown, the directional control valve 4 blocks the inflow of Hydraulic oil in the line 5, which further to the attached to the housing 2 Switching valve 6 leads, which switching valve 6 acts on the annular space 7 around the piston 1 or the piston rod via the preferably in the Cylinder pipe integrated line 8 controls with hydraulic oil.
  • a suction valve 16 is provided, which again to the Cylinder base attached or advantageously in the cylinder housing 2 can be integrated. This suction valve promotes rapid downward movement the upper cheek of the press hydraulic oil from the oil tank 13 to the top of the piston 9 after.
  • the suction valve 16 is preferably by a hydraulic Signal triggered.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Actuator (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
EP99890215A 1998-07-08 1999-06-30 Presse hydraulique Withdrawn EP0970803A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT45698 1998-07-08
AT45698U AT3110U1 (de) 1998-07-08 1998-07-08 Hydraulische presse

Publications (1)

Publication Number Publication Date
EP0970803A1 true EP0970803A1 (fr) 2000-01-12

Family

ID=3491116

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99890215A Withdrawn EP0970803A1 (fr) 1998-07-08 1999-06-30 Presse hydraulique

Country Status (2)

Country Link
EP (1) EP0970803A1 (fr)
AT (1) AT3110U1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003027507A1 (fr) * 2001-08-29 2003-04-03 Bosch Rexroth Ag Cylindre hydraulique a soupapes
DE10152414B4 (de) * 2001-08-29 2013-01-17 Bosch Rexroth Aktiengesellschaft Hydraulikzylinder
CN109261381A (zh) * 2018-11-20 2019-01-25 中国工程物理研究院总体工程研究所 一种应用于高速土工离心机的管线敷设结构

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR911076A (fr) * 1944-12-28 1946-06-27 Presse et son application comme machine à mouler, sous pression, des matières plastiques
FR2174731A1 (fr) * 1972-03-09 1973-10-19 Foley Ronald
DE2935814A1 (de) * 1979-09-05 1981-03-26 Hermann Etscheid oHG, 53577 Neustadt Niederhaltevorrichtung an einer tiefziehpresse
FR2528503A1 (fr) * 1982-06-11 1983-12-16 Gewerk Eisenhuette Westfalia Verin hydraulique
DE4208256A1 (de) * 1992-03-14 1993-09-16 Guenter Richter Hydraulische steuereinrichtung fuer messerstern-teigteil- und wirkmaschinen
DE4304721A1 (de) * 1993-02-17 1994-08-18 Rexroth Mannesmann Gmbh Hydraulisch betriebene Maschine

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR911076A (fr) * 1944-12-28 1946-06-27 Presse et son application comme machine à mouler, sous pression, des matières plastiques
FR2174731A1 (fr) * 1972-03-09 1973-10-19 Foley Ronald
DE2935814A1 (de) * 1979-09-05 1981-03-26 Hermann Etscheid oHG, 53577 Neustadt Niederhaltevorrichtung an einer tiefziehpresse
FR2528503A1 (fr) * 1982-06-11 1983-12-16 Gewerk Eisenhuette Westfalia Verin hydraulique
DE4208256A1 (de) * 1992-03-14 1993-09-16 Guenter Richter Hydraulische steuereinrichtung fuer messerstern-teigteil- und wirkmaschinen
DE4304721A1 (de) * 1993-02-17 1994-08-18 Rexroth Mannesmann Gmbh Hydraulisch betriebene Maschine

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003027507A1 (fr) * 2001-08-29 2003-04-03 Bosch Rexroth Ag Cylindre hydraulique a soupapes
US7156013B2 (en) 2001-08-29 2007-01-02 Bosch Rexroth Ag Hydraulic cylinder comprising valves
DE10152414B4 (de) * 2001-08-29 2013-01-17 Bosch Rexroth Aktiengesellschaft Hydraulikzylinder
CN109261381A (zh) * 2018-11-20 2019-01-25 中国工程物理研究院总体工程研究所 一种应用于高速土工离心机的管线敷设结构
CN109261381B (zh) * 2018-11-20 2024-01-30 中国工程物理研究院总体工程研究所 一种应用于高速土工离心机的管线敷设结构

Also Published As

Publication number Publication date
AT3110U1 (de) 1999-10-25

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