EP1270103A2 - Hydraulische Arbeitsmaschine - Google Patents
Hydraulische Arbeitsmaschine Download PDFInfo
- Publication number
- EP1270103A2 EP1270103A2 EP02450122A EP02450122A EP1270103A2 EP 1270103 A2 EP1270103 A2 EP 1270103A2 EP 02450122 A EP02450122 A EP 02450122A EP 02450122 A EP02450122 A EP 02450122A EP 1270103 A2 EP1270103 A2 EP 1270103A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- working
- rod
- tool
- valve
- pressure
- 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
Links
Images
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
-
- 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
- B21D55/00—Safety devices protecting the machine or the operator, specially adapted for apparatus or machines dealt with in this subclass
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/28—Arrangements for preventing distortion of, or damage to, presses or parts thereof
Definitions
- the invention relates to a hydraulic machine, with at least one under Pressure in the working chamber on the piston side a tool that moves the working cylinder, the one in the rod-side working space, which is under pressure when the tool is reset has a greatly reduced cross section compared to the piston side, and its outflow from the rod-side work space to the emergency stop of the tool in the work process can be shut off via the associated control valve.
- the object of the present invention is to overcome the disadvantages described avoid and especially a hydraulic machine of the aforementioned Art to improve so that the emergency stop distance can be shortened significantly, preferably down to the range of about 1 mm.
- the invention is based on the consideration that the hydraulic Systems always assumed internal stiffness (non-compressibility of a liquid) of the system with the comparatively small cross sections on the rod side of the described hydraulic working machines no longer exist or at least is significantly reduced.
- the volume of the medium will solve the problem set in accordance with the present Invention provided that the rod-side workspace at an emergency stop over a quick-switching emergency valve can be connected to a separate high-pressure hydraulic medium source is. This means that an active one can be activated within a very short time after triggering an emergency stop Braking the working cylinder can be ensured, with which the mentioned safety requirements are easy to fulfill.
- the high pressure hydraulic medium source is formed by a pressure accumulator, which has a separate Connection can be filled.
- a pressure accumulator which has a separate Connection can be filled.
- the Emergency valve is arranged in the immediate vicinity of the rod-side work area and one controls significantly larger cross section compared to the medium connections. This too Measure serves to further improve the most immediate and unobstructed possible Response of the emergency stop system.
- the piston-side working space 1 or its connecting line 9 is also on the Control valve 8 controllable - further compensation or suction valves, pressure relief valves, Connection lines, pumps, tanks and the like for the operation of such work machines
- Elements that are usually required are no further than within the scope of the invention essential and known per se for simplicity and clarity not shown.
- the working medium connections (lines 9, 9 ') have a significantly larger cross section 10 Connecting bore 11, a quick-switching emergency valve 12 is arranged, which in the event of an emergency stop, the rod-side working space 6 with a separate high-pressure hydraulic medium source 13 - here designed as fillable via a separate connection 14 Pressure accumulator 15 - connects.
- the piston 16 of the working cylinder 4 could also be one momentary complete shut-off of the control valve 8 due to the very small effective Cross section 7 of the rod-side working space 6 due to the not unlimited high rigidity of the hydraulic medium contained therein sink or swing even further, whereby with a correspondingly heavy and thus mass-bearing tool 2, a stop path of up to 10 mm can occur in practice. But if at the same time about the relative Large cross section 10 of the connection bore 11 high pressure medium from the pressure accumulator 15 this stop route can be drastically reduced - in terms of size down to about 1 mm.
- the fast-switching emergency valve 12 is in the example shown as a pilot 2/2-way poppet valve, its axial connection with the rod-side working space 6 is connected and its radial connection is connected to the pressure accumulator 15 is.
- the control chamber of the seat valve with the radial connection is via a nozzle in the valve cone of the seat valve connected. Furthermore, the control chamber of the seat valve is through a spring-loaded magnet armature, the end of which is opposite the spring as Sealing cone is formed, shut off when the magnet is de-energized.
- the state of the magnet is both the working space 6 and the pressure accumulator 15 hermetically sealed.
- the pressure in the accumulator 15 tensions both the sealing cone of the spring-loaded Magnet armature as well as the valve cone of the 2/2-way pilot valve in the opening direction in front. Energizing the magnet moves the magnet armature against the compression spring and opens the control chamber of the seat valve to the tank. The only on the ring surface in the radial connection acting on the valve cone accumulator pressure exerts a very high force the valve plug in the opening direction and thus leads to a very short opening time.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Actuator (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
Description
Claims (3)
- Hydraulische Arbeitsmaschine, mit zumindest einem unter Druck im kolbenseitigen Arbeitsraum (1) ein Werkzeug (2) im Arbeitsgang (Pfeil 3) bewegenden Arbeitszylinder (4), der in dem bei der Werkzeugrückstellung (Pfeil 4) unter Druck stehenden stangenseitigen Arbeitsraum (6) einen gegenüber der Kolbenseite stark verkleinerten Querschnitt (7) aufweist, und dessen Abfluß aus dem stangenseitigen Arbeitsraum (6) zum Not-Stop des Werkzeuges (2) im Arbeitsgang (Pfeil 3) über das zugehörige Regelventil (8) absperrbar ist, dadurch gekennzeichnet, daß der stangenseitige Arbeitsraum (6) beim Not-Stop über ein schnell schaltendes Not-Ventil (12) mit einer separaten Hochdruck-Hydraulikmediumquelle verbindbar ist.
- Arbeitsmaschine nach Anspruch 1, dadurch gekennzeichnet, daß die Hochdruck-Hydraulikmediumquelle von einem Druckspeicher (15) gebildet ist, der über einen separaten Anschluß (14) befüllbar ist.
- Arbeitsmaschine nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß das Not-Ventil (12) in unmittelbarer Nähe des stangenseitigen Arbeitsraumes (6) angeordnet ist und einen gegenüber den Arbeits-Mediumanschlüssen (14) signifikant größeren Querschnitt steuert.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT9972001 | 2001-06-27 | ||
AT9972001A AT410469B (de) | 2001-06-27 | 2001-06-27 | Hydraulische arbeitsmaschine |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1270103A2 true EP1270103A2 (de) | 2003-01-02 |
EP1270103A3 EP1270103A3 (de) | 2005-10-05 |
EP1270103B1 EP1270103B1 (de) | 2008-04-02 |
Family
ID=3683899
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02450122A Expired - Lifetime EP1270103B1 (de) | 2001-06-27 | 2002-05-22 | Hydraulische Arbeitsmaschine |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1270103B1 (de) |
AT (1) | AT410469B (de) |
DE (1) | DE50212001D1 (de) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2542665A1 (de) * | 1975-09-25 | 1977-05-05 | Hartmann & Laemmle Kg | Vorrichtung zur schlagfreien dekompression, insbesondere hydraulischer systeme |
DE4416955A1 (de) * | 1994-05-13 | 1994-12-01 | Ulrich Keller | Entlastungsventil |
JPH08121416A (ja) * | 1994-10-24 | 1996-05-14 | Tokyo Isuzu Jidosha Kk | アキュムレータ付油圧装置 |
DE19711207A1 (de) * | 1997-03-18 | 1998-09-24 | Schuler Pressen Gmbh & Co | Ziehvorrichtung für eine Presse |
EP0967028A2 (de) * | 1998-03-03 | 1999-12-29 | Hoerbiger Hydraulik GmbH | Hydraulische Presse |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2856583C2 (de) * | 1978-12-22 | 1985-02-07 | Alfred Dipl.-Ing. 1000 Berlin Ulrich | Dreipunktanbauvorrichtung für einen Schlepper mit einem Heck- und/oder Frontanbaugerät |
JPH03229003A (ja) * | 1989-12-04 | 1991-10-11 | Hitachi Constr Mach Co Ltd | 油圧モータ駆動回路 |
JPH07119860A (ja) * | 1993-10-20 | 1995-05-12 | Nisshinbo Ind Inc | 液圧方向制御装置及びこれを用いた液圧作動装置 |
-
2001
- 2001-06-27 AT AT9972001A patent/AT410469B/de not_active IP Right Cessation
-
2002
- 2002-05-22 DE DE50212001T patent/DE50212001D1/de not_active Expired - Lifetime
- 2002-05-22 EP EP02450122A patent/EP1270103B1/de not_active Expired - Lifetime
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2542665A1 (de) * | 1975-09-25 | 1977-05-05 | Hartmann & Laemmle Kg | Vorrichtung zur schlagfreien dekompression, insbesondere hydraulischer systeme |
DE4416955A1 (de) * | 1994-05-13 | 1994-12-01 | Ulrich Keller | Entlastungsventil |
JPH08121416A (ja) * | 1994-10-24 | 1996-05-14 | Tokyo Isuzu Jidosha Kk | アキュムレータ付油圧装置 |
DE19711207A1 (de) * | 1997-03-18 | 1998-09-24 | Schuler Pressen Gmbh & Co | Ziehvorrichtung für eine Presse |
EP0967028A2 (de) * | 1998-03-03 | 1999-12-29 | Hoerbiger Hydraulik GmbH | Hydraulische Presse |
Also Published As
Publication number | Publication date |
---|---|
EP1270103B1 (de) | 2008-04-02 |
DE50212001D1 (de) | 2008-05-15 |
ATA9972001A (de) | 2002-09-15 |
EP1270103A3 (de) | 2005-10-05 |
AT410469B (de) | 2003-05-26 |
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