GB1158850A - Hydraulic System for Press Brakes or the like - Google Patents
Hydraulic System for Press Brakes or the likeInfo
- Publication number
- GB1158850A GB1158850A GB52243/67A GB5224367A GB1158850A GB 1158850 A GB1158850 A GB 1158850A GB 52243/67 A GB52243/67 A GB 52243/67A GB 5224367 A GB5224367 A GB 5224367A GB 1158850 A GB1158850 A GB 1158850A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cylinder
- valve
- pressure
- spring
- pump
- 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
- B30B15/24—Control arrangements for fluid-driven presses controlling the movement of a plurality of actuating members to maintain parallel movement of the platen or press beam
-
- 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
- B30B15/16—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
- 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
- F15B11/04—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed
- F15B11/044—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed by means in the return line, i.e. "meter out"
-
- 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
- F15B2211/2053—Type of pump
- F15B2211/20538—Type of pump constant 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
- F15B2211/3056—Assemblies of multiple valves
- F15B2211/3059—Assemblies of multiple valves having multiple valves for multiple 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
- F15B2211/50—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
- F15B2211/50518—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means using pressure relief 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
- F15B2211/50—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
- F15B2211/50536—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means using unloading valves controlling the supply pressure by diverting fluid to the 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
- F15B2211/515—Pressure control characterised by the connections of the pressure control means in the circuit
- F15B2211/5151—Pressure control characterised by the connections of the pressure control means in the circuit being connected to a pressure source 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
- F15B2211/52—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
- F15B2211/55—Pressure control for limiting a pressure up to a maximum pressure, e.g. by using a pressure relief 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
- F15B2211/575—Pilot pressure control
-
- 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
- F15B2211/60—Circuit components or control therefor
- F15B2211/615—Filtering 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
- F15B2211/70—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
- F15B2211/71—Multiple output members, e.g. multiple hydraulic motors or cylinders
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)
- Braking Arrangements (AREA)
Abstract
1,158,850. Press brakes. PACIFIC PRESS & SHEAR CORP. 16 Nov., 1967 [16 May, 1967], No. 52243/67. Heading B3E. [Also in Division B5] In an hydraulic press brake &c. comprising at least one hydraulic motor 3 or 5 including a cylinder 7 and piston 9 coupled to a ram 1, the upper and lower ends of the cylinder 7 being connected through flow-reversing means to pump means P for producing work and return strokes of the ram 1, means are provided for throttling discharge flow from the cylinder 7 during a return stroke whenever return movement of the piston 9 exceeds that producible by normal pump feed of liquid to the cylinder 7. As shown, two motors 3 have their pistons 9 connected to opposite ends of the ram 1 and two pumps P are provided. Each pump is connected to the upper side of one cylinder 7 and the lower side of the other cylinder. The means for throttling discharge flow from the cylinder 7 during a return stroke includes a valve assembly 51 shown in section in Fig. 3 and including an input 57 for connection to pump line 20 and a discharge 59 connected to a tank 15. A spring 65 normally biases a main valve 63 against its seat 61. A small opening 73 allows access for hydraulic fluid to a chamber 71 above the valve 63. An auxiliary passage 77 connects the input 57 to a chamber at the lower end of the valve 63. The pressure in the lower end of each cylinder 7 can be transmitted through a line 111 to the valve assembly 51 to act on a valve spool 103 which is biased to the left by a spring 105. If the pressure at 111 is sufficient to overcome the spring 105 a passage 97 in a valve sleeve 91 is opened and pressure in chamber 71 is relieved through a by-pass passageway 81 controlled by a solenoid-operated valve 79. Relief of pressure at 71 allows the excess pressure at 77 to overcome spring 67 and open valve 63 so that fluid can be discharged from the upper side of cylinder 7. If the return movement of one of the pistons 9 is too great, pressure at 111 will be insufficient to overcome the spring 105 and valve 103 will be moved to block passage 97.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US63898667A | 1967-05-16 | 1967-05-16 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1158850A true GB1158850A (en) | 1969-07-23 |
Family
ID=24562274
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB52243/67A Expired GB1158850A (en) | 1967-05-16 | 1967-11-16 | Hydraulic System for Press Brakes or the like |
Country Status (4)
Country | Link |
---|---|
US (1) | US3464320A (en) |
BE (1) | BE708654A (en) |
FR (1) | FR1548216A (en) |
GB (1) | GB1158850A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111550474A (en) * | 2020-05-07 | 2020-08-18 | 徐州徐工液压件有限公司 | Hydraulic system for double-cylinder synchronous load lateral force test bed |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3722366A (en) * | 1971-03-22 | 1973-03-27 | Pacific Press & Shear Corp | Precision anti-whip ram type machine |
US4204459A (en) * | 1978-04-19 | 1980-05-27 | Caterpillar Tractor Co. | Combination check and flow control valve for hydraulic systems |
GB8513955D0 (en) * | 1985-06-03 | 1985-07-03 | Samco Strong Ltd | Cutting press |
CN102699670B (en) * | 2012-05-31 | 2015-03-04 | 韶关东南轴承有限公司 | Riveting device based on speed and pressure combination control |
US9651067B2 (en) * | 2012-07-31 | 2017-05-16 | Caterpillar Inc. | Hydraulic system with a dynamic seal |
CN111520368B (en) * | 2020-04-21 | 2022-03-04 | 中联重科股份有限公司 | Flow distribution control method of load sensitive system |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2431032A (en) * | 1943-04-05 | 1947-11-18 | Hpm Dev Corp | Flow controlling valve means for hydraulic motors |
US2470778A (en) * | 1946-06-25 | 1949-05-24 | Matthew B Butler | Hydraulic system for selfloading trucks |
US2648346A (en) * | 1952-05-19 | 1953-08-11 | Bendix Aviat Corp | Locking valve for hydraulic motors |
US2872903A (en) * | 1956-11-13 | 1959-02-10 | Emhart Mfg Co | Fluid lock valve |
US3015316A (en) * | 1959-01-08 | 1962-01-02 | William Waterman | Counterbalance valves and the like |
US3071926A (en) * | 1960-04-12 | 1963-01-08 | Hyster Co | Hydraulic lift cylinder circuit |
US3169453A (en) * | 1962-03-26 | 1965-02-16 | New York Air Brake Co | Valve |
US3381587A (en) * | 1965-09-10 | 1968-05-07 | Deere & Co | Hydraulic control system |
US3349669A (en) * | 1966-04-20 | 1967-10-31 | Rolland A Richardson | Ram attitude control system |
-
1967
- 1967-05-16 US US638986A patent/US3464320A/en not_active Expired - Lifetime
- 1967-11-16 GB GB52243/67A patent/GB1158850A/en not_active Expired
- 1967-12-28 FR FR1548216D patent/FR1548216A/fr not_active Expired
- 1967-12-28 BE BE708654D patent/BE708654A/xx not_active IP Right Cessation
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111550474A (en) * | 2020-05-07 | 2020-08-18 | 徐州徐工液压件有限公司 | Hydraulic system for double-cylinder synchronous load lateral force test bed |
CN111550474B (en) * | 2020-05-07 | 2022-03-22 | 徐州徐工液压件有限公司 | Hydraulic system for double-cylinder synchronous load lateral force test bed |
Also Published As
Publication number | Publication date |
---|---|
US3464320A (en) | 1969-09-02 |
BE708654A (en) | 1968-05-02 |
DE1627857A1 (en) | 1969-10-30 |
FR1548216A (en) | 1968-11-29 |
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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 |