EP2514977B1 - bloque de commande pour une presse - Google Patents

bloque de commande pour une presse Download PDF

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Publication number
EP2514977B1
EP2514977B1 EP12002738.8A EP12002738A EP2514977B1 EP 2514977 B1 EP2514977 B1 EP 2514977B1 EP 12002738 A EP12002738 A EP 12002738A EP 2514977 B1 EP2514977 B1 EP 2514977B1
Authority
EP
European Patent Office
Prior art keywords
valve
pressure
directional valve
chamber
block
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.)
Active
Application number
EP12002738.8A
Other languages
German (de)
English (en)
Other versions
EP2514977A3 (fr
EP2514977A2 (fr
Inventor
Nicolas Cano
Heiko Schwannauer
Benedetto Silvani
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch 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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP2514977A2 publication Critical patent/EP2514977A2/fr
Publication of EP2514977A3 publication Critical patent/EP2514977A3/fr
Application granted granted Critical
Publication of EP2514977B1 publication Critical patent/EP2514977B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/003—Systems with load-holding valves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/16—Control arrangements for fluid-driven presses
    • 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
    • B30B15/281—Arrangements for preventing distortion of, or damage to, presses or parts thereof overload limiting devices
    • B30B15/284—Arrangements for preventing distortion of, or damage to, presses or parts thereof overload limiting devices releasing fluid from a fluid chamber subjected to overload pressure
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205—Systems with pumps
    • F15B2211/20576—Systems with pumps with multiple pumps
    • F15B2211/20584—Combinations of pumps with high and low capacity
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/30505—Non-return valves, i.e. check valves
    • F15B2211/30515—Load holding valves
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/3056—Assemblies of multiple valves
    • F15B2211/30565—Assemblies of multiple valves having multiple valves for a single output member, e.g. for creating higher valve function by use of multiple valves like two 2/2-valves replacing a 5/3-valve
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/405—Flow control characterised by the type of flow control means or valve
    • F15B2211/40507—Flow control characterised by the type of flow control means or valve with constant throttles or orifices
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/41—Flow control characterised by the positions of the valve element
    • F15B2211/411—Flow control characterised by the positions of the valve element the positions being discrete
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/415—Flow control characterised by the connections of the flow control means in the circuit
    • F15B2211/41527—Flow control characterised by the connections of the flow control means in the circuit being connected to an output member and a directional control valve
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/415—Flow control characterised by the connections of the flow control means in the circuit
    • F15B2211/41554—Flow control characterised by the connections of the flow control means in the circuit being connected to a return line and a directional control valve
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/50—Pressure control
    • F15B2211/505—Pressure control characterised by the type of pressure control means
    • F15B2211/50509—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means
    • F15B2211/50545—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means using braking valves to maintain a back pressure
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/50—Pressure control
    • F15B2211/515—Pressure control characterised by the connections of the pressure control means in the circuit
    • F15B2211/5156—Pressure control characterised by the connections of the pressure control means in the circuit being connected to a return line and a directional control valve

Definitions

  • the present invention relates to a hydraulic press control/safety block.
  • a generic press block or press module is used to set up a reliable press which, among other things, meets the safety regulations in accordance with the German industrial standard DIN EN 693.
  • the consumer is shown as a piston/cylinder unit having a piston chamber communicating with a fluid tank via a self-checking safety valve of the 2/2 shift valve type.
  • a branch line branches off upstream of the safety valve, which leads into a directional valve of the 4/3 switching valve design, to which a pressure medium source and the fluid tank are also directly connected.
  • a self-monitoring hold-up valve of 2/2 shift valve design is connected to the annular chamber of the consumer, which in turn is connected to the self-monitoring directional valve.
  • a pressure relief line branches off upstream of the hold-up valve, into which a pressure relief valve is inserted, by means of which the maximum annular chamber pressure can be set.
  • an overpressure line in which a pressure-limiting valve is arranged, also branches off from the pressure medium source into the fluid tank.
  • the invention provides that the pressure chamber of a consumer in the press, which is pressurized to hold up the upper die (in this case, for example, the annular chamber of a piston/cylinder unit that represents the press cylinder or press ram), is connected directly to the control block.
  • a monitored hold-up valve and a monitored directional valve are directly connected in series in the control block without any additional valves connected in between. In this respect, this corresponds to the state of the art mentioned at the outset.
  • a safe fluid path consisting of "the defined consumer chamber (e.g. the annular chamber according to the exemplary embodiment) - hold-up valve - directional valve” is retained, into which limited/limited inflows/outflows exclusively flow via nozzles (throttle points).
  • the concept according to the invention provides that no other valves for controlling the movement sequence etc. are looped into the named fluid path.
  • Such valves are only provided downstream of the directional valve, as seen from the consumer side (annular chamber side), for example a rapid travel valve.
  • the directional valve can be screwed to the outside of a base block of the control block.
  • Another aspect of the invention provides additional press functions that go beyond the basic functions according to the prior art mentioned (e.g. pressing surface activation in the case of a 3-surface cylinder) via an (external) intermediate block inserted between the basic block defined above and the directional valve to control.
  • the safe fluid path "defined pressure chamber at the consumer - hold-up valve - directional valve" is also retained, possibly with the interposition of a through-channel of the intermediate block.
  • the hold-up valve for the consumer pressure chamber in question annular chamber
  • a safety valve for the pressure medium source hereinafter simply referred to as pump
  • a self-monitored bypass valve or safety valve for the other consumer pressure chamber pron chamber
  • a rapid travel valve screwed or inserted into a standard base block, preferably with a pressure relief function.
  • the hydraulic control can be designed with a set-up function, for which another directional valve is provided, which is connected via (two) nozzles or throttle points to the pressure chambers (annular chamber, piston chamber) of the consumer in order to selectively supply the chambers with a control fluid from one/the to supply the pump.
  • another directional valve is provided, which is connected via (two) nozzles or throttle points to the pressure chambers (annular chamber, piston chamber) of the consumer in order to selectively supply the chambers with a control fluid from one/the to supply the pump.
  • the upward and downward set-up speed of the consumer is limited (preferably to a maximum of 10mm/s) compared to normal operation.
  • the intermediate block carries such additional functions that do not impair the safety control circuit according to the above definition.
  • the directional valve is bolted onto the base block and in the case of an inter-block arrangement the inter-block is preferably interposed between the base block and the directional valve principally without affecting the safety control circuit as defined in the base block.
  • the intermediate block has a through-bore which, coming from the hold-up valve within the base block, extends to the directional valve screwed onto the intermediate block, without further paths leading off from this or only via interposed nozzles at which the flow is limited.
  • the piston/cylinder unit 1 serves the press block according to the first preferred embodiment of the invention for controlling and securing a consumer, as in the 2 is shown schematically as a piston/cylinder unit 1.
  • the piston/cylinder unit 1 has a piston 1a with a piston rod 1b fixed thereto, which divides the cylinder 1c into a piston chamber K and an annular chamber R in a fluid-tight manner.
  • a weight for example the upper die cushion of a hydraulic press (not shown), is suspended from the piston rod 1b.
  • the consumer 1 is shown in a retracted, ie retracted, position in which the weight must be kept free and safe.
  • the annular chamber R is connected via a first pressure line 2 to a self-monitoring hydraulic hold-up valve 4, preferably of the 2/2 switching valve design, which blocks a fluid flow at least from the annular chamber R in a first switching position (construction position) and completely releases the fluid connection in a second switching position .
  • a self-monitoring hydraulic hold-up valve 4 preferably of the 2/2 switching valve design, which blocks a fluid flow at least from the annular chamber R in a first switching position (construction position) and completely releases the fluid connection in a second switching position .
  • an overpressure line 6 branches off from the pressure line 2 into a pressure medium tank T, into which a pressure-limiting valve 8 is used to set a maximum annular chamber pressure.
  • the hold-up valve 4 is in turn connected in series directly (i.e. without the interposition of further switching elements) to a self-monitoring directional valve 10, preferably of the 4/3 switching valve design, one further connection of which is connected to the pressure medium tank T via a pressure relief line 12.
  • a pressure medium source P is also connected to the directional valve 10, at the output of which a pressure line 14 leading into the pressure medium tank T with an inserted pressure-limiting valve 16 is also connected.
  • the piston chamber K of consumption 1 is also connected directly to the directional valve 10 via a pressure line 18, a tank line 20 branching off from the pressure line 18 to the pressure medium tank T, in which a safety valve 22, preferably of the 2/2 switching valve design, is used.
  • the safety valve 22 blocks the tank line 20 in a first switching position and releases it in a second switching position.
  • a pressure relief valve 24 in the pressure relief line 12 between the directional valve 10 and the tank T which only opens the pressure relief line 12 at a specific line pressure, with a bypass line 26 bypassing the pressure relief valve 24 being provided, in which a Eilgangventil 28 is preferably arranged the 2/2 switching valve design.
  • the rapid travel valve 28 completely blocks the bypass line 26 in a first switching position (construction position) and releases it in a second switching position.
  • set-up valve 30 preferably of the 4/3 switching valve design, is connected to the overpressure line 6 between the pressure-limiting valve 8 and the pressure medium tank T. Furthermore, the set-up valve is connected via a throttle point or nozzle 32 to the pressure line 2 between the branch point to the overpressure line 6 and the hold-up valve 4, whereas the last connection of the set-up valve 30 is connected via a further throttle point or nozzle 34 to the piston chamber K or the pressure line 18 between the piston chamber K and the safety valve 22 is fluidly connected.
  • All valves with the exception of the directional valve 10, are used in the base block and are hydraulically connected via channels drilled out in the base block.
  • the directional valve 10 on the other hand, is screwed onto the base block in such a way that all connections to and from the directional valve 10 are made as described above by screwing the directional valve 10 onto the base block.
  • the directional valve 10 is switched to a switching position in which the piston chamber K can be connected to the pressure medium source P and the annular chamber R can be connected to the tank T.
  • the rapid travel valve 28 is switched to its release position in order to be able to convey the fluid from the annular chamber R quickly into the tank T.
  • the hold-up valve 4 is also in its release position.
  • the rapid travel valve 28 is switched to the blocking position, with all other valves remaining in the switching position for rapid travel described above.
  • the hold-up valve 4 and the rapid travel valve 28 return to their design positions (blocking positions) and the directional valve 10 is brought into a switching position in which the piston chamber K is connected to the pressure medium source P (pump) and the annular chamber R is connected receives with the pressure medium tank T via the pressure relief valve 24.
  • set-up valve 30 is switched from its blocking position to a first or second switch position, in which it optionally uses piston chamber K to extend and annular chamber R to retract consumer 1 connects to the control pressure port ST. Since these connections take place via the (two) nozzles 32, 34, a slower exit and entry of the consumer 1 is achieved.
  • valves which are either arranged between the directional valve 10 and the pump P or the tank T or in a limited way, for example via the nozzles 32, 34 mentioned on the piston and annular chamber K, R of the consumer 1 are connected.
  • the safety circuit according to the above definition is always the same in the basic block, regardless of the additional assembly variants, of which a variant is described below with reference to the second preferred exemplary embodiment.
  • a downward movement pump P is switched to piston chamber K
  • only the directional valve 10 is actuated accordingly.
  • an upward movement pump P is switched to annular chamber R
  • only the directional valve 10 and the hold-up valve 4 operated accordingly.
  • the rapid travel valve 28 with pressure relief function is not in the safe flow path.
  • an intermediate block which is structurally mounted between the base block and the directional valve 10 on the base block.
  • a number of connections are provided in the form of bore openings, which are (quasi automatically) connected to the (four) connections in the base block with the assembly, with the directional valve 10 now being screwed onto an outside of the intermediate block.
  • At least one channel (through hole A) within the intermediate block, which establishes the connection between the hold-up valve 4 and the directional valve 10, thus forms a part or section of the secured fluid path according to the above definition.
  • the intermediate block there is a switching valve 35 of the 2/2 switching valve type in a pressure line 36 between the directional valve 10 and the piston chamber K of the consumer 1, which is connected in parallel to the pressure line 18 according to the first exemplary embodiment of the invention.
  • the switching valve 35 releases the parallel-connected pressure line 36 and blocks it in at least one direction towards the piston chamber K in a second switching position.
  • a pressure-controlled shuttle valve 38 is housed in the intermediate block, which is connected to the channel between the hold-up valve 4 and the directional valve 10 via a throttle or nozzle 40 and to the parallel-connected pressure line 36 between the directional valve 10 and the switching valve 35.
  • the switching functions of the second preferred embodiment of the invention are in the control panel according to FIG 3 shown.
  • the switching positions of the valves correspond to FIG 3 for the individual operating functions of the press essentially those of the first Embodiment according to 2 . Only in the case of rapid movement is the switching valve 35 actuated into its partially blocking switching position, in which a flow in the direction of the piston chamber K via the parallel pressure line 36 is blocked.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Control Of Presses (AREA)

Claims (5)

  1. Bloc de commande hydraulique pour une presse, constitué d'une soupape directionnelle (10) et d'un bloc de base avec une soupape de maintien en position haute (4) qui est reliée à un premier raccord de chambre de pression (X2) du bloc de base pour une première chambre de pression sélectionnée (R) d'un utilisateur de presse hydraulique (1), et à laquelle est raccordée en aval du premier raccord de chambre de pression (X2) la soupape directionnelle (10) qui conduit sélectivement un fluide sous pression à partir d'un raccord de fluide sous pression (P1) du bloc de base, agencé en aval de la soupape directionnelle (10), pouvant être relié à une pompe (P), par l'intermédiaire de la soupape de maintien en position haute (4) vers le premier raccord de chambre de pression (X2) ou vers un autre raccord de chambre de pression (X1) du bloc de base pour une deuxième chambre de contre-pression (K) de l'utilisateur de presse hydraulique, afin de permettre des fonctions de mouvement de base et de sécurité prédéterminées de la presse, un chemin de fluide sécurisé étant défini dans le bloc de commande, constitué du premier raccord de chambre de pression (X2), de la soupape de maintien en position haute (4) et de la soupape directionnelle (10), dans lequel débouchent exclusivement des entrées et/ou des sorties (6) restreintes ou limitées en termes d'écoulement par l'intermédiaire de points d'étranglement (8, 32, 40), la soupape directionnelle (10) pouvant être vissée sur le bloc de base du côté extérieur.
  2. Bloc de commande hydraulique selon la revendication 1, caractérisé en ce que dans ou sur le bloc de base est agencée une soupape de marche rapide (28) qui, en partant de la première chambre de pression sélectionnée (R), est prévue en aval de la soupape de direction (10), entre la soupape directionnelle (10) et un raccord de réservoir (T1), afin de permettre un mouvement rapide de l'utilisateur (1), dû à un faible écoulement limité, de l'une des chambres de pression sélectionnées (R, K) au réservoir.
  3. Bloc de commande hydraulique selon la revendication 2, caractérisé par une soupape de limitation de pression (24) qui est agencée dans une conduite de détente de pression (12) en parallèle avec la soupape de marche rapide (28).
  4. Bloc de commande hydraulique selon l'une quelconque des revendications précédentes, caractérisé par une soupape de réglage (30) qui peut conduire un fluide de commande d'une pompe (P) sélectivement vers l'un des deux raccords de chambre de pression (X1, X2) du bloc de base, un étranglement ou une buse (32, 34) étant respectivement intercalé entre la soupape de réglage (30) et les raccords de chambre de pression (X1, X2).
  5. Bloc de commande hydraulique selon la revendication 1, caractérisé par un bloc intermédiaire supportant des fonctions auxiliaires sélectionnées de la presse, qui est monté structurellement entre le bloc de base et la soupape directionnelle (10), et dans lequel le bloc intermédiaire comporte un premier alésage traversant (A) qui est relié au niveau d'une de ses embouchures à la soupape de maintien en position haute (4) et par son autre embouchure à la soupape directionnelle (10), qui est placée sur le bloc intermédiaire et forme une section partielle du chemin de fluide sécurisé.
EP12002738.8A 2011-04-23 2012-04-19 bloque de commande pour une presse Active EP2514977B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011018473 2011-04-23
DE102011116328A DE102011116328A1 (de) 2011-04-23 2011-10-18 Pressenblock

Publications (3)

Publication Number Publication Date
EP2514977A2 EP2514977A2 (fr) 2012-10-24
EP2514977A3 EP2514977A3 (fr) 2014-04-02
EP2514977B1 true EP2514977B1 (fr) 2023-07-19

Family

ID=46045662

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12002738.8A Active EP2514977B1 (fr) 2011-04-23 2012-04-19 bloque de commande pour une presse

Country Status (3)

Country Link
EP (1) EP2514977B1 (fr)
BR (1) BR102012009138B1 (fr)
DE (1) DE102011116328A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3144543A1 (fr) 2015-09-17 2017-03-22 Robert Bosch Gmbh Dispositif et méthode pour controller un arrangement de vanne de sécurité
EP3248743B1 (fr) * 2016-05-27 2018-07-25 Adolf Mohr Maschinenfabrik GmbH & Co. KG Decoupeuse
DE102016120068A1 (de) * 2016-10-21 2018-04-26 Voith Patent Gmbh Hydraulischer Antrieb für eine Ziehkissenvorrichtung einer Presse
DE102017129618B4 (de) * 2017-12-12 2021-03-18 Parker Hannifin EMEA S.à.r.l Ziehkissenvorrichtung

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2402174A (en) * 2003-05-28 2004-12-01 Volvo Constr Equip Holding Se Load holding valve control

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19740029C2 (de) * 1997-09-11 1999-07-15 Stabilus Gmbh Aktives Stellsystem
JP3919399B2 (ja) * 1998-11-25 2007-05-23 カヤバ工業株式会社 油圧制御回路
DE60032732T2 (de) * 1999-10-20 2007-10-25 Hitachi Construction Machinery Co., Ltd. Rohrbruch steuerventil vorrichtung
DE10107139B4 (de) * 2001-02-15 2004-09-23 Gebr. Pöttinger GmbH Pflug

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2402174A (en) * 2003-05-28 2004-12-01 Volvo Constr Equip Holding Se Load holding valve control

Also Published As

Publication number Publication date
EP2514977A3 (fr) 2014-04-02
DE102011116328A1 (de) 2012-10-25
EP2514977A2 (fr) 2012-10-24
BR102012009138B1 (pt) 2022-03-08
BR102012009138A2 (pt) 2015-01-20

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