GB1158850A - Hydraulic System for Press Brakes or the like - Google Patents

Hydraulic System for Press Brakes or the like

Info

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
Application number
GB52243/67A
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.)
Pacific Press and Shear Corp
Original Assignee
Pacific Press and Shear Corp
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 Pacific Press and Shear Corp filed Critical Pacific Press and Shear Corp
Publication of GB1158850A publication Critical patent/GB1158850A/en
Expired legal-status Critical Current

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)
  • Control Of Presses (AREA)
  • Braking Arrangements (AREA)
  • Fluid-Pressure Circuits (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.
GB52243/67A 1967-05-16 1967-11-16 Hydraulic System for Press Brakes or the like Expired GB1158850A (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Cited By (2)

* Cited by examiner, † Cited by third party
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
FR1548216A (en) 1968-11-29
US3464320A (en) 1969-09-02
DE1627857A1 (en) 1969-10-30
BE708654A (en) 1968-05-02

Similar Documents

Publication Publication Date Title
GB1288351A (en)
GB1040379A (en) Fluid motor control system
GB1182641A (en) Pilot Operated Control Valve Mechanism
GB1443650A (en) Device for controlling hydraulic fluid
US4307654A (en) Filling and exhaust valve for the control of the hydraulic flow on presses and shears
DE2124068C2 (en)
GB1206381A (en) Anti-cavitation means for hydraulic motors
GB1308808A (en) Hydraulic driving device for sheet metal working presses
GB1158850A (en) Hydraulic System for Press Brakes or the like
GB1352310A (en) Hydraulic control valves
US3433131A (en) Control systems for hydraulic power units
ES359167A1 (en) Unitary combination of pressure-responsive flow control unidirectional valves for hydraulic systems
US2633708A (en) Control for hydraulic presses
GB1328663A (en) Hydraulic vavle assemblies
GB1284946A (en) Oil pressure controlling device for high inertia loads
US2608059A (en) Hydraulic pressure booster
GB1465714A (en) Motor vehicle open centre series hydraulic circuit
US3659498A (en) Ram attitude control system and valve assembly therefor
US2665552A (en) Load responsive pressure regulating valve
GB1234280A (en)
ES357404A1 (en) Hydraulic control valve with void prevention means
EP0625106B1 (en) Slip-controlled brake system
GB1210233A (en) Liquid fuel injection pumping apparatus
GB1115725A (en) Hydraulic cushion for dies
US2825309A (en) Directly operated sequence valve

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