GB1347725A - Actuating systems for hydraulically operated bending machines - Google Patents
Actuating systems for hydraulically operated bending machinesInfo
- 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
- ram
- reservoir
- 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
Links
Classifications
-
- 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
- B30B15/161—Control 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
-
- 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
-
- 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
- F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
- F15B11/024—Systems 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
-
- 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
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/021—Valves for interconnecting the fluid chambers of an actuator
-
- 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
- F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
- F15B11/024—Systems 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
- F15B2011/0243—Systems 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
-
- 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
-
- 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
- F15B2211/305—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
- F15B2211/3058—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 having additional valves for interconnecting the fluid chambers of a double-acting actuator, e.g. for regeneration mode or for floating mode
-
- 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
- F15B2211/315—Directional control characterised by the connections of the valve or valves in the circuit
- F15B2211/31552—Directional control characterised by the connections of the valve or valves in the circuit being connected to an output member and a return line
- F15B2211/31558—Directional 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
-
- 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
- F15B2211/315—Directional control characterised by the connections of the valve or valves in the circuit
- F15B2211/3157—Directional 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
- F15B2211/31576—Directional 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
-
- 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
- F15B2211/324—Directional control characterised by the type of actuation mechanically manually, e.g. by using a lever or pedal
-
- 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
- F15B2211/329—Directional 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
- F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
- F15B2211/75—Control of speed of the output member
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)
- Fluid-Pressure Circuits (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
- Press Drives And Press Lines (AREA)
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.
Applications Claiming Priority (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 (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2147836A (en) * | 1983-09-21 | 1985-05-22 | Amada Co Ltd | Bending press |
CN112196853A (en) * | 2020-11-05 | 2021-01-08 | 上海航天控制技术研究所 | Hydraulic energy control valve block |
Families Citing this family (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE795282A (en) * | 1972-02-24 | 1973-05-29 | Poclain Sa | VIBRATION GENERATOR USING A FLUID CYLINDER |
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 |
US4509405A (en) * | 1979-08-20 | 1985-04-09 | Nl Industries, Inc. | Control valve system for blowout preventers |
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 |
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 GROUP WITH AUTOMATIC REGENERATIVE SYSTEM TYPICALLY FOR WOOD SPLITTERS OPERATED 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 | balance 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 |
DE102022129425B3 (en) | 2022-11-08 | 2023-12-21 | Gl Gmbh Metall- Und Werkstatttechnik | Lifting device |
Family Cites Families (4)
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 | Device for hydraulic actuation of tools or the like, in particular of movable elements of molds of plastic injection presses |
-
1971
- 1971-08-11 US US00170876A patent/US3759144A/en not_active Expired - Lifetime
- 1971-08-11 DE DE19712140183 patent/DE2140183A1/en active Pending
- 1971-08-11 FR FR7129344A patent/FR2102291B1/fr not_active Expired
- 1971-08-13 GB GB3802871A patent/GB1347725A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2147836A (en) * | 1983-09-21 | 1985-05-22 | Amada Co Ltd | Bending press |
CN112196853A (en) * | 2020-11-05 | 2021-01-08 | 上海航天控制技术研究所 | Hydraulic energy control valve block |
Also Published As
Publication number | Publication date |
---|---|
US3759144A (en) | 1973-09-18 |
DE2140183A1 (en) | 1972-02-24 |
FR2102291B1 (en) | 1974-08-19 |
FR2102291A1 (en) | 1972-04-07 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PCNP | Patent ceased through non-payment of renewal fee |