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GB1190703A - Control Device for the Control of the Decompression of the Working Fluid in Hydraulic Machines and Machines Provided with such a Device. - Google Patents

Control Device for the Control of the Decompression of the Working Fluid in Hydraulic Machines and Machines Provided with such a Device.

Info

Publication number
GB1190703A
GB1190703A GB5036/68A GB503668A GB1190703A GB 1190703 A GB1190703 A GB 1190703A GB 5036/68 A GB5036/68 A GB 5036/68A GB 503668 A GB503668 A GB 503668A GB 1190703 A GB1190703 A GB 1190703A
Authority
GB
United Kingdom
Prior art keywords
valve
stroke
spring
pressure
piston
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.)
Expired
Application number
GB5036/68A
Inventor
Gaston Sebastien Forichon
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB1190703A publication Critical patent/GB1190703A/en
Expired legal-status Critical Current

Links

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
    • F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
    • 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
    • B30B15/18—Control arrangements for fluid-driven presses controlling the reciprocating motion of the ram
    • B30B15/186—Controlling the return movement of the ram, e.g. decompression 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
    • F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
    • F15B21/08—Servomotor systems incorporating electrically operated control means
    • 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
    • F15B2211/30525—Directional control valves, e.g. 4/3-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
    • F15B2211/30—Directional control
    • F15B2211/32—Directional control characterised by the type of actuation
    • F15B2211/321—Directional control characterised by the type of actuation mechanically
    • F15B2211/325—Directional control characterised by the type of actuation mechanically actuated by an output member of the circuit
    • 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
    • F15B2211/32—Directional control characterised by the type of actuation
    • F15B2211/327—Directional control characterised by the type of actuation electrically or electronically
    • 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
    • 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
    • F15B2211/5159—Pressure control characterised by the connections of the pressure control means in the circuit being connected to an output member and a return line
    • 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
    • F15B2211/52—Pressure control characterised by the type of actuation
    • F15B2211/521—Pressure control characterised by the type of actuation mechanically
    • F15B2211/524—Pressure control characterised by the type of actuation mechanically actuated by an output member of the circuit
    • 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
    • F15B2211/52—Pressure control characterised by the type of actuation
    • F15B2211/528—Pressure control characterised by the type of actuation actuated by fluid 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
    • F15B2211/56—Control of an upstream 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
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/705—Output members, e.g. hydraulic motors or cylinders or control therefor characterised by the type of output members or actuators
    • F15B2211/7051—Linear output members
    • F15B2211/7053—Double-acting output members
    • 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
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/77—Control of direction of movement of the output member
    • F15B2211/7716—Control of direction of movement of the output member with automatic return
    • 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
    • F15B2211/80—Other types of control related to particular problems or conditions
    • F15B2211/85—Control during special operating conditions
    • F15B2211/853—Control during special operating conditions during stopping
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/7722—Line condition change responsive valves
    • Y10T137/7758—Pilot or servo controlled
    • Y10T137/7762—Fluid pressure type
    • Y10T137/7769—Single acting fluid servo
    • Y10T137/777—Spring biased

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Self-Closing Valves And Venting Or Aerating Valves (AREA)
  • Mechanically-Actuated Valves (AREA)
  • Magnetically Actuated Valves (AREA)

Abstract

1,190,703. Hydraulic press. G. S. FORICHON. 31 Jan., 1968 [17 Feb., 1967], No. 5036/68. Heading B5F. A bleed device, for decompressing the working fluid in an hydraulic machine at the end of the working stroke of its ram, comprises an hydraulically damped relief valve seated in a chamber connected directly to the ram actuating chamber of the machine, the valve being biased to the closed position by a spring. The valve is initially lifted from its seat to vent the pressure fluid to reservoir either by manometric action when the pressure in the ram actuating chamber has reached a desired level, or by control rod action when the ram has reached the end point of its stroke, and is of such a shape that, once lifted, the fluid flowing past the seat quickly entrains the valve further away from the seat. This movement causes a cam carried by the valve to actuate switch gear which reverses the action of the pump thus initiating the return stroke, the relief valve being closed by the spring to terminate the bleed when the pressure in the ram actuating chamber has been lowered sufficiently. In the press shown in the figure, the relief valve 1, which is biased against seat S by spring 10 and the inbalance of pressure acting upon its various surfaces, carries cap 11 connected to rod 12, itself provided at one end with an adjustable nut adapted to be engaged by table 6 carried by the working piston 5. A spring biased pilot valve 23 connects the space above the valve seats to the space below it. For manometric operation, see Fig. 3 (not shown), the nut 13 is adjusted to stay clear of table 6 at all times and the spring 24 of valve 23 is adjusted so that valve 23 opens at the pressure developed in chamber 4 at the end of the stroke of the piston. When, at the end of the stroke, the pilot valve opens, pressure fluid flows through tube 36 to act upon shoulder 13 of the relief valve thus causing that valve to lift from its seat. The valve is immediately entrained downward and cap 11 actuates switch gear 29 thus retracting the piston, the relief valves subsequently closing upon the relief of pressure in chamber 4. For control rod operation, spring 24 is adjusted to keep valve 23 shut at all times, and nut 13 is adjusted so that it is engaged by table 6 at the end of the stroke of the piston. Upon engagement of the table with the nut the valve 1 is pulled slightly open and is subsequently entrained and further opened as before thus operating the switch gear to return the piston.
GB5036/68A 1967-02-17 1968-01-31 Control Device for the Control of the Decompression of the Working Fluid in Hydraulic Machines and Machines Provided with such a Device. Expired GB1190703A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR95456A FR1511906A (en) 1967-02-17 1967-02-17 Device for controlling the decompression of the working fluid in hydraulic machines such as presses and machines equipped with said device

Publications (1)

Publication Number Publication Date
GB1190703A true GB1190703A (en) 1970-05-06

Family

ID=8625502

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5036/68A Expired GB1190703A (en) 1967-02-17 1968-01-31 Control Device for the Control of the Decompression of the Working Fluid in Hydraulic Machines and Machines Provided with such a Device.

Country Status (4)

Country Link
US (1) US3534679A (en)
DE (1) DE1627819A1 (en)
FR (1) FR1511906A (en)
GB (1) GB1190703A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2146576A (en) * 1983-08-24 1985-04-24 Amada Co Ltd Press

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3945299A (en) * 1974-06-24 1976-03-23 Albany International Industries, Inc. Linear positioning apparatus
US4029359A (en) * 1975-04-30 1977-06-14 The Heil Co. Safety apparatus for hydraulic valves in dump body mechanisms
DE2542665C2 (en) * 1975-09-25 1986-02-06 Hartmann & Lämmle GmbH & Co KG, 7255 Rutesheim Arrangement for the impact-free decompression of a pressure medium-operated, in particular hydraulic system
JPS54129573A (en) * 1978-03-31 1979-10-08 Amada Co Ltd Stroke controller in bending machine
FI791227A (en) * 1979-04-17 1980-10-18 Jorma Lillbacka PRESSANORDNING
US4860646A (en) * 1987-02-10 1989-08-29 Marathon Corporation Compactor with hydraulic dwell and method
US4898427A (en) * 1988-11-30 1990-02-06 Commercial Intertech Coporation Neutral stop device
ITMO20010211A1 (en) * 2001-11-02 2003-05-02 Euromac Srl IMPROVEMENT OF THE SPOOL OF THE COPY DISTRIBUTOR IN HYDRAULIC CIRCUITS FOR THE CONTROL OF THE MOVEMENT OF THE MAGLIO IN MACCHI
CN108973145B (en) * 2018-05-29 2023-10-13 山东华宇工学院 Pressure head special for spoke noise reduction plate and contact acting force calibration method
CN109078925B (en) * 2018-09-27 2023-07-18 夏伟 Countable nut implanter

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2146576A (en) * 1983-08-24 1985-04-24 Amada Co Ltd Press
GB2177651A (en) * 1983-08-24 1987-01-28 Amada Co Ltd Press
GB2177650A (en) * 1983-08-24 1987-01-28 Amada Co Ltd Press
US4656862A (en) * 1983-08-24 1987-04-14 Amada Company, Limited Press machine

Also Published As

Publication number Publication date
US3534679A (en) 1970-10-20
DE1627819A1 (en) 1971-01-14
FR1511906A (en) 1968-02-02

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLE Entries relating assignments, transmissions, licences in the register of patents
PCNP Patent ceased through non-payment of renewal fee