GB1347725A - Actuating systems for hydraulically operated bending machines - Google Patents

Actuating systems for hydraulically operated bending machines

Info

Publication number
GB1347725A
GB1347725A GB3802871A GB3802871A GB1347725A GB 1347725 A GB1347725 A GB 1347725A GB 3802871 A GB3802871 A GB 3802871A GB 3802871 A GB3802871 A GB 3802871A GB 1347725 A GB1347725 A GB 1347725A
Authority
GB
United Kingdom
Prior art keywords
chamber
fluid
duct
reservoir
ram
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
GB3802871A
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.)
Amada Co Ltd
Original Assignee
Amada Co Ltd
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
Priority to JP7141270 priority Critical
Application filed by Amada Co Ltd filed Critical Amada Co Ltd
Publication of GB1347725A publication Critical patent/GB1347725A/en
Expired legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B30PRESSES
    • B30BPRESSES IN GENERAL
    • B30B15/00Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/16Control arrangements for fluid-driven presses
    • B30B15/161Control arrangements for fluid-driven presses controlling the ram speed and ram pressure, e.g. fast approach speed at low pressure, low pressing speed at high pressure
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D5/00Bending sheet metal along straight lines, e.g. to form simple curves
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/02Systems essentially incorporating special features for controlling the speed or actuating force of an output member
    • F15B11/024Systems essentially incorporating special features for controlling the speed or actuating force of an output member by means of differential connection of the servomotor lines, e.g. regenerative circuits
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/021Valves for interconnecting the fluid chambers of an actuator
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/02Systems essentially incorporating special features for controlling the speed or actuating force of an output member
    • F15B11/024Systems essentially incorporating special features for controlling the speed or actuating force of an output member by means of differential connection of the servomotor lines, e.g. regenerative circuits
    • F15B2011/0243Systems essentially incorporating special features for controlling the speed or actuating force of an output member by means of differential connection of the servomotor lines, e.g. regenerative circuits the regenerative circuit being activated or deactivated automatically
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00Circuits for servomotor systems
    • F15B2211/30Directional control
    • F15B2211/305Directional control characterised by the type of valves
    • F15B2211/30505Non-return valves, i.e. check valves
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00Circuits for servomotor systems
    • F15B2211/30Directional control
    • F15B2211/305Directional control characterised by the type of valves
    • F15B2211/30525Directional control valves, e.g. 4/3-directional control valve
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00Circuits for servomotor systems
    • F15B2211/30Directional control
    • F15B2211/305Directional control characterised by the type of valves
    • F15B2211/3056Assemblies of multiple valves
    • F15B2211/30565Assemblies 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
    • F15B2211/3058Assemblies 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 having additional valves for interconnecting the fluid chambers of a double-acting actuator, e.g. for regeneration mode or for floating mode
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00Circuits for servomotor systems
    • F15B2211/30Directional control
    • F15B2211/315Directional control characterised by the connections of the valve or valves in the circuit
    • F15B2211/31552Directional control characterised by the connections of the valve or valves in the circuit being connected to an output member and a return line
    • F15B2211/31558Directional control characterised by the connections of the valve or valves in the circuit being connected to an output member and a return line having a single output member
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00Circuits for servomotor systems
    • F15B2211/30Directional control
    • F15B2211/315Directional control characterised by the connections of the valve or valves in the circuit
    • F15B2211/3157Directional control characterised by the connections of the valve or valves in the circuit being connected to a pressure source, an output member and a return line
    • F15B2211/31576Directional control characterised by the connections of the valve or valves in the circuit being connected to a pressure source, an output member and a return line having a single pressure source and a single output member
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00Circuits for servomotor systems
    • F15B2211/30Directional control
    • F15B2211/32Directional control characterised by the type of actuation
    • F15B2211/321Directional control characterised by the type of actuation mechanically
    • F15B2211/324Directional control characterised by the type of actuation mechanically manually, e.g. by using a lever or pedal
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00Circuits for servomotor systems
    • F15B2211/30Directional control
    • F15B2211/32Directional control characterised by the type of actuation
    • F15B2211/329Directional control characterised by the type of actuation actuated by fluid pressure
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00Circuits for servomotor systems
    • F15B2211/70Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/75Control of speed of the output member

Abstract

1347725 Press brakes AMADA CO Ltd 13 Aug 1971 [17 Aug 1970] 38028/71 Heading B3E A ram of a bending press is raised at an enhanced speed by supplying pressure fluid to the chamber a of a cylinder 5 from a pump 17 and from the chamber b of the cylinder, via circuit means 29, until increased resistance is met, e.g. at the start of a bending operation, whereupon the speed of the ram is reduced by operation of a valve means in the circuit means so that pressure fluid from the chamber b is fed to a reservoir 19. In operation the piston 11 is raised by pressurizing the chamber a while the fluid discharged from the chamber b passes via ducts 25, 26 to valve assembly 29, fluid being prevented from returning to the reservoir by a check valve 23. The discharge fluid from the chamber b passes through a chamber 43 of the assembly 29 to a duct 21 where it joins the pressure fluid from the pump. When the ram meets a workpiece the pressure in chamber a is raised until, at a predetermined value, the fluid is conveyed into an oil port 61 of the assembly 29. This causes a piston 49 to move to the left as seen in Fig. 3, against the resistance of a spring 55 and establishes an hydraulic connection between duct 26 and a duct 33. The discharge fluid from chamber b therefore passes along duct 33 to the reservoir. Upon completion of the bending operation a valve 37 is actuated to close duct 21, thus causing the fluid in chamber a to flow into the reservoir due to the piston being lowered by the weight of the ram, fluid being sucked into chamber b via duct 25 and check valve 23.
GB3802871A 1970-08-17 1971-08-13 Actuating systems for hydraulically operated bending machines Expired GB1347725A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7141270 1970-08-17

Publications (1)

Publication Number Publication Date
GB1347725A true GB1347725A (en) 1974-02-27

Family

ID=13459763

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3802871A Expired GB1347725A (en) 1970-08-17 1971-08-13 Actuating systems for hydraulically operated bending machines

Country Status (4)

Country Link
US (1) US3759144A (en)
DE (1) DE2140183A1 (en)
FR (1) FR2102291B1 (en)
GB (1) GB1347725A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2147836A (en) * 1983-09-21 1985-05-22 Amada Co Ltd Bending press

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE795282A (en) * 1972-02-24 1973-05-29 Poclain Sa Generator vibration using a bailer has fluid
DE2356607A1 (en) * 1973-11-13 1975-05-22 Bosch Gmbh Robert Hydraulic control system
GB1542402A (en) * 1975-07-07 1979-03-21 Smiths Industries Ltd Fluid pressure supply apparatus
US4411189A (en) * 1977-07-18 1983-10-25 The Scott And Fetzer Company Fluid flow controlling device
US4216702A (en) * 1978-05-01 1980-08-12 Eaton Yale Ltd. Pressure sensing regenerative hydraulic system
US4313633A (en) * 1979-07-11 1982-02-02 Caterpillar Tractor Co. Self adjusting actuator system
WO1981000249A1 (en) * 1979-07-11 1981-02-05 J Muntjanoff Self adjusting actuator system
US4614148A (en) * 1979-08-20 1986-09-30 Nl Industries, Inc. Control valve system for blowout preventers
US4349041A (en) * 1979-08-20 1982-09-14 Nl Industries, Inc. Control valve system for blowout preventers
US4509405A (en) * 1979-08-20 1985-04-09 Nl Industries, Inc. Control valve system for blowout preventers
DD207298A3 (en) * 1981-12-23 1984-02-22 Kurt Seidel Hydraulic press
FR2562611A1 (en) * 1984-04-09 1985-10-11 Alberti Rosette Method for supplying hydraulic jacks and hydraulic jacks implementing the method
US4836088A (en) * 1985-08-21 1989-06-06 Rome Industries, Inc. Directional control valve and regeneration valve
AT408331B (en) * 2000-02-17 2001-10-25 Hoerbiger Hydraulik Operating arrangement for moving parts on vehicles, in particular tail covers, hatches, hoods or the like.
US6164113A (en) * 2000-03-14 2000-12-26 Crc-Evans Pipeline International, Inc. Variable-speed pipe bending
IT1319478B1 (en) * 2000-12-05 2003-10-10 Bell Srl Hydraulic unit with automatic regeneration system typically permacchine splitter driven by a single-acting jack
AT505724B1 (en) * 2007-09-12 2010-06-15 Trumpf Maschinen Austria Gmbh Drive device for a bend press
CN103470815B (en) * 2013-09-30 2015-08-26 常德中联重科液压有限公司 Equilibrium valve
CN103615576A (en) * 2013-12-02 2014-03-05 黎维 Multifunctional combination valve
CN104863909B (en) * 2015-04-18 2016-03-02 浙江大学 With the spring pressurizing closed hydraulic oil container of volume, pressure and leakage detection function

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US25643A (en) * 1859-10-04 bourgnon
FR1023703A (en) * 1949-08-23 1953-03-23 Keelavite Co Ltd Improvements to hydraulic rams
GB863701A (en) * 1959-04-03 1961-03-22 Caterpillar Tractor Co Control for hydraulic jack circuits
FR1530770A (en) * 1967-06-20 1968-06-28 M U C Schiffer O H G Hydraulic actuating device for tools or the like, including movable elements presses mold injecting the plastic

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2147836A (en) * 1983-09-21 1985-05-22 Amada Co Ltd Bending press

Also Published As

Publication number Publication date
FR2102291A1 (en) 1972-04-07
US3759144A (en) 1973-09-18
DE2140183A1 (en) 1972-02-24
FR2102291B1 (en) 1974-08-19

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee