EP2514977A2 - Bloc de presse - Google Patents

Bloc de presse Download PDF

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Publication number
EP2514977A2
EP2514977A2 EP12002738A EP12002738A EP2514977A2 EP 2514977 A2 EP2514977 A2 EP 2514977A2 EP 12002738 A EP12002738 A EP 12002738A EP 12002738 A EP12002738 A EP 12002738A EP 2514977 A2 EP2514977 A2 EP 2514977A2
Authority
EP
European Patent Office
Prior art keywords
valve
directional valve
pressure
hydraulic control
pressure chamber
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
EP12002738A
Other languages
German (de)
English (en)
Other versions
EP2514977A3 (fr
EP2514977B1 (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 control / securing block of a hydraulic press and more particularly to a press block according to the preamble of claim 1.
  • a generic press block or press module is used to build a reliable press, which u.a. meets the safety regulations according to the German industrial standard DIN EN 693.
  • the consumer is shown as a piston / cylinder unit having a piston chamber connected to a fluid tank via a self-monitoring safety valve of the 2/2 shift valve type.
  • a self-monitoring safety valve of the 2/2 shift valve type Upstream to the safety valve forks off a branch line, which opens into a directional valve of the 4/3-Schaltventilbauweise, to which further a pressure medium source and the fluid tank are connected directly.
  • a self-monitoring hold-up valve of the 2/2 switching valve type Connected to the annular chamber of the consumer is a self-monitoring hold-up valve of the 2/2 switching valve type, which in turn is connected to the self-monitoring directional valve. Upstream to the hold valve branches off a pressure relief line, in which a pressure relief valve is used, by means of which the maximum annular chamber pressure is adjustable.
  • the pressure chamber is a press-own consumer, which is pressurized for holding the upper die (in the present example, the annular chamber of a piston / cylinder unit, which is the press cylinder or press ram), connected directly to the control block.
  • the control block a monitored upshift valve and a monitored directional valve are connected directly in series without any intermediate valves. This corresponds to the extent of the above-mentioned prior art.
  • the defined consumer chamber for example, the annular chamber according to the embodiment
  • the concept according to the invention provides that no other valves for controlling the sequence of motions, etc., are looped into said fluid path.
  • Such valves are seen from the consumer side (ring chamber side) from only downstream of the directional valve provided, for example, a pressure relief valve or a rapid traverse valve.
  • a further aspect of the invention provides additional press functions that go beyond the basic functions according to the cited prior art (for example, press surface connection in the case of a 3-surface cylinder) via an (external) intermediate block inserted between the above-defined basic block and the directional valve to control.
  • the safe fluid path also remains "defined pressure chamber at the consumer - hold-up valve - directional valve" possibly with the interposition of a passage channel of the intermediate block).
  • the hold-high valve for the relevant consumer pressure chamber annular chamber
  • a safety valve for the pressure medium source hereinafter simply referred to as a pump
  • a self-monitored bypass valve or safety valve for the other consumer pressure chamber resiston chamber
  • a rapid traverse valve preferably screwed or inserted with a pressure limiting function in a standard basic block.
  • the hydraulic control can be configured with a Einrichtfunktion, for which a further directional valve is provided which is connected via (two) nozzles or throttle points with the pressure chambers (annular chamber, piston chamber) of the consumer to selectively the chambers with a control fluid of one / Supply the pump.
  • the nozzle is the upward and downward adjustment of the consumer (preferably to a maximum of 10mm / s) compared to normal operation limited.
  • the intermediate block carries such additional functions, which do not affect the safety control circuit according to the above definition.
  • the intermediate block when the directional valve is screwed onto the base block, in the case of an intermediate block arrangement, the intermediate block is preferably interposed between the base block and the directional valve without impairing the safety control circuit as defined in the basic block. Accordingly, the intermediate block has a through-bore, which extends from the hold-up valve within the base block to the directional valve screwed onto the intermediate block, without any further paths going away therefrom or leaving only via interposed nozzles, at which the flow is limited.
  • the press block according to the first preferred embodiment of the invention serves to control and secure a consumer as described in US Pat Fig. 2 is shown schematically as a piston / cylinder unit 1.
  • the piston / cylinder unit 1 has a piston 1a with the piston rod 1b fixed thereon, which subdivides 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), hangs on the piston rod 1b.
  • the consumer 1 is shown in a retracted, ie retracted position in which the weight must be kept free and secure.
  • the annular chamber R is connected via a first pressure line 2 with a self-monitoring hydraulic hold-up valve 4 preferably the 2/2-Schaltventilbauweise that locks in a first switching position (construction position) fluid flow at least from the annular chamber R and completely releases the fluid connection in a second switching position ,
  • a self-monitoring hydraulic hold-up valve 4 preferably the 2/2-Schaltventilbauweise that locks in a first switching position (construction position) fluid flow at least from the annular chamber R and completely releases the fluid connection in a second switching position .
  • Upstream of the hold-up valve 4 ie, between the hold-up valve and annular chamber R
  • the hold-up valve 4 is in turn connected directly in series (i.e., without the interposition of other switching elements) to a self-monitoring directional valve 10, preferably the 4/3 shift valve design, having another port connected to the fluid tank T via a pressure relief line 12.
  • a pressure medium source P is also connected, at the output of a leading into the pressure medium tank T pressure relief line 14 with inserted pressure relief 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, wherein a tank line 20 branches off from the pressure line 18 to the pressure medium tank T, into which a safety valve 22 of the 2/2-Schaltventilbauweise is preferably used.
  • the safety valve 22 in this case blocks the tank line 20 in a first switching position and releases it in a second switching position.
  • a pressure relief valve 24 which opens the pressure relief line 12 only at a certain line pressure, wherein the pressure relief valve 24 bypass line 26 is provided, in a Rapid traction valve 28 is preferably arranged in the 2/2-way valve construction.
  • the emergency valve 28 locks the bypass line 26 completely (construction position) in a first switching position and releases them in a second switching position.
  • a Einrichtventil 30 preferably the 4/3-Schaltventilbauweise whose one more connection to one or the pressure medium source P is connected.
  • the set-up valve is connected via a throttle point or nozzle 32 with the pressure line 2 between the Ab Servicestelle to the pressure line 6 and the hold-high valve 4, whereas the last connection of the Einrichtventils 30 via another throttle point or nozzle 34 with the piston chamber K and the pressure line 18 between the piston chamber K and the safety valve 22 is fluidly connected.
  • Fig. 2 From the Fig. 2 It can be seen that the entire control described above is combined in a press block or basic block with at least one pump inlet P1, which is directly connected to the directional valve 10, a control pressure input ST, which leads to the Einrichtventil 30 and a tank port T1. Furthermore, at least two consumer connections X1, X2 are provided which lead to the piston chamber and annular chamber K, R of the consumer 1.
  • valves are used in the basic block with the exception of the directional valve 10 and hydraulically connected via channels drilled in the base block.
  • the directional valve 10 is screwed onto the base block, such that all connections to and from the directional valve 10 as described above by the screwing of the directional valve 10 are made to the basic block.
  • the directional valve 10 is switched to a switching position in which the piston chamber K with the pressure medium source P and the annular chamber R with the tank T can get in the present case.
  • the rapid traverse valve 28 is switched to its release position in order to be able to rapidly convey the fluid from the annular chamber R into the tank T.
  • the hold-up valve 4 is also in its release position.
  • the rapid traverse valve 28 For extension of the consumer 1 in normal operation, i. under pressing load, the rapid traverse valve 28 is switched to the blocking position, with all other valves remaining in the above-described switching position for rapid traverse.
  • the hold-back valve 4 and the rapid traverse valve 28 return to their design positions (locking positions) and the directional valve 10 is brought into a switching position in which the piston chamber K communication with the pressure medium source P (pump) and the annular chamber R compound with the pressure medium tank T via the pressure relief valve 24 receives.
  • the set-up valve 30 is switched from its blocking position to a first or second switching position in which it is either the piston chamber K for an extension and the annular chamber R for a retraction of the consumer with the Control pressure connection ST connects. Since these connections in each case via the (two) nozzles 32, 34, a slowed out and entry of the consumer 1 is achieved.
  • the safety circuit according to the above definition is always the same in the basic block, regardless of the additional equipment variants, of which a variant will be described below with reference to the second preferred 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 traverse valve 28 with pressure limiting function is not in the safe flow path.
  • an intermediate block which is constructionally mounted between the base block and the directional valve 10 on the base block.
  • a number of connections in the form of bore openings are provided, which are connected to the (four) terminals in the basic block with the assembly (quasi automatic), wherein now the directional valve 10 is screwed on an outer side 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 as defined above.
  • a switching valve 35 of the 2/2-Schaltventilbauart 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 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 via a throttle or nozzle 40 with the channel between the hold-4 and directional valve 10 and connected to the other parallel to the pressure line 36 connected in parallel between the directional valve 10 and the switching valve 35.
  • the switching functions of the second preferred embodiment of the invention are in the switchboard according to the Fig. 3 shown.
  • a hydraulic control block of a press comprising a base block with a hold-up valve connected to a port for a first selected pressure chamber of a hydraulic press consumer and to which is connected from the first pressure chamber port downstream of a directional valve which selectively supplies a pressure means from downstream to Direction valve disposed, connectable with a pump pressure medium connection via the hold valve to the first pressure chamber port or to a connection for a second back pressure chamber to enable predetermined Grundschuls- and securing functions.
  • a safe fluid path is defined in the basic block, consisting of the first pressure chamber connection, the hold-up valve and the directional valve, into which either no flow or limited fluid flow or limited flow ends.

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)
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 true EP2514977A2 (fr) 2012-10-24
EP2514977A3 EP2514977A3 (fr) 2014-04-02
EP2514977B1 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)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3248743A1 (fr) * 2016-05-27 2017-11-29 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

Families Citing this family (2)

* 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
DE102017129618B4 (de) * 2017-12-12 2021-03-18 Parker Hannifin EMEA S.à.r.l Ziehkissenvorrichtung

Family Cites Families (5)

* 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
KR100518768B1 (ko) * 2003-05-28 2005-10-06 볼보 컨스트럭션 이키프먼트 홀딩 스웨덴 에이비 부하홀딩용 유압밸브의 제어장치

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3248743A1 (fr) * 2016-05-27 2017-11-29 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

Also Published As

Publication number Publication date
EP2514977A3 (fr) 2014-04-02
DE102011116328A1 (de) 2012-10-25
EP2514977B1 (fr) 2023-07-19
BR102012009138B1 (pt) 2022-03-08
BR102012009138A2 (pt) 2015-01-20

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