GB872951A - Hydraulic ram apparatus - Google Patents

Hydraulic ram apparatus

Info

Publication number
GB872951A
GB872951A GB31420/58A GB3142058A GB872951A GB 872951 A GB872951 A GB 872951A GB 31420/58 A GB31420/58 A GB 31420/58A GB 3142058 A GB3142058 A GB 3142058A GB 872951 A GB872951 A GB 872951A
Authority
GB
United Kingdom
Prior art keywords
valve
pressure
chamber
piston
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
GB31420/58A
Inventor
Henry Norton
Hubert Veare Norton
Leslie Buckingham Norton
Douglas Edwin Norton
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.)
Norton Tool Co Ltd
Original Assignee
Norton Tool 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
Application filed by Norton Tool Co Ltd filed Critical Norton Tool Co Ltd
Publication of GB872951A publication Critical patent/GB872951A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q5/00—Driving or feeding mechanisms; Control arrangements therefor
    • B23Q5/22—Feeding members carrying tools or work
    • B23Q5/26—Fluid-pressure drives
    • 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
    • B30B15/183—Controlling the filling of the press cylinder during the approach stroke of the ram, e.g. prefill-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
    • 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
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205—Systems with pumps
    • F15B2211/20576—Systems with pumps with multiple pumps
    • F15B2211/20592—Combinations of pumps for supplying high and low 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
    • F15B2211/30—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
    • F15B2211/40—Flow control
    • F15B2211/405—Flow control characterised by the type of flow control means or valve
    • F15B2211/40515—Flow control characterised by the type of flow control means or valve with variable throttles or orifices
    • 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
    • F15B2211/40—Flow control
    • F15B2211/415—Flow control characterised by the connections of the flow control means in the circuit
    • F15B2211/41581—Flow control characterised by the connections of the flow 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
    • F15B2211/40—Flow control
    • F15B2211/42—Flow control characterised by the type of actuation
    • F15B2211/421—Flow control characterised by the type of actuation mechanically
    • F15B2211/423—Flow 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
    • F15B2211/40—Flow control
    • F15B2211/42—Flow control characterised by the type of actuation
    • F15B2211/428—Flow 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
    • F15B2211/40—Flow control
    • F15B2211/45—Control of bleed-off flow, e.g. control of bypass flow 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
    • F15B2211/40—Flow control
    • F15B2211/46—Control of flow in the return line, i.e. meter-out 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
    • F15B2211/50—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
    • F15B2211/52—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
    • F15B2211/70—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
    • F15B2211/775—Combined control, e.g. control of speed and force for providing a high speed approach stroke with low force followed by a low speed working stroke with high force, e.g. for a hydraulic press

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

872,951. Hydraulic apparatus. NORTON TOOL CO. Ltd. Sept. 21, 1959 [Oct. 1, 1958], No. 31420/58. Class 69 (2). [Also in Group XXII] Hydraulic apparatus, such as a press, shaper, slotter, rock drill, or other member comprises two chambers 17, 18, Fig. 1, which are formed by a differential area piston 12 in a cylinder 11 and are connected by a passage 22, 23, 24, 25 containing valve means 26 arranged to permit flow from the chamber 18 of smaller effective area, which is connected to a source 20 of hydraulic pressure, to the chamber 17 of larger effective area, which communicates with a valve 34 operable to control the release of hydraulic fluid therefrom, on the occurrence of a predetermined high pressure in the chamber 18 and, thereafter, to permit flow in the same direction at a lower pressure, the predetermined high pressure being greater than the pressure required to return the piston with the valve 34 fully open. The control valve 34 consists of a piston 35 connected by a spring 38 to a manually-operable lever 39. With the lever in the position shown, the piston 12 having been moved to its upper position by the pressure from the pump in the chamber 18, the fluid moves the piston 28 of the valve 26 upwards and passes through a port 32, passages 24, 33 and the valve 34 to an exhaust line 40. When the lever is moved to the left, the piston 35 of the valve 34 closes the exhaust line and pressure builds up in the passage 25 and chamber 17 to move the piston downwardly, fluid in the lower chamber passing through the connecting passages and valve 26 to the upper chamber 17. The pressure is maintained on the ram until the lever 39 is moved to the right, the pressure then being relieved, the valve 26 closing and the ram immediately rising since the pump is permanently connected to the chamber 18. When the ram abuts a stop 41 high pressure in the chamber 18 and passages 22, 23 re-opens the valve 26. In another embodiment, the valve 26 is replaced by a spring-loaded non-return valve and a valve in parallel with the non- return valve operated mechanically by a striker on the ram. In a further embodiment, a low-pressure pump 50, Fig. 5, is included in the hydraulic circuit to provide a rapid approach stroke of the ram. The pump is connected by an unloader valve 51 and a non-return valve 52 to the line 25. The valve 51 has a member 57 spring-urged to a closed position by a spring 56, and a member 59 which, when the pressure in the chamber 17 is higher than that delivered from the pump 50, moves the member 57 to the left to by-pass the output from the pump to a reservoir 19. In order that the closing of the valve 26 in the high-pressure circuit may not be impaired by fluid trapped below its piston, the ends of the cylinder of the valve are interconnected by a passage 64 in which is a piston- and-cylinder device 62. The control valve 34 may be replaced by a control unit such as is described in Specification 872,950.
GB31420/58A 1958-10-01 1958-10-01 Hydraulic ram apparatus Expired GB872951A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB355352X 1958-10-01

Publications (1)

Publication Number Publication Date
GB872951A true GB872951A (en) 1961-07-12

Family

ID=10378803

Family Applications (1)

Application Number Title Priority Date Filing Date
GB31420/58A Expired GB872951A (en) 1958-10-01 1958-10-01 Hydraulic ram apparatus

Country Status (4)

Country Link
US (1) US3033170A (en)
CH (1) CH355352A (en)
GB (1) GB872951A (en)
NL (1) NL243893A (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3495634A (en) * 1966-06-20 1970-02-17 John G Hurst Level sensitive control apparatus
US3494491A (en) * 1966-10-29 1970-02-10 Mitsubishi Heavy Ind Ltd Materials handling vehicle
US3518918A (en) * 1967-04-11 1970-07-07 Singer Co Pressure differential control system for actuation of a movable member
US3841202A (en) * 1972-03-20 1974-10-15 Combustion Eng Control valve and method
US4007845A (en) * 1975-03-17 1977-02-15 Massey-Ferguson Inc. Swing mechanism
US4218955A (en) * 1979-01-10 1980-08-26 Outboard Marine Corporation Pressure actuated shifting mechanism
US4506999A (en) * 1983-07-12 1985-03-26 Telesis Controls Corporation Program controlled pin matrix embossing apparatus
DE3836601C1 (en) * 1988-10-27 1990-01-04 Index-Werke Kg Hahn & Tessky, 7300 Esslingen, De
US5115720A (en) * 1990-04-02 1992-05-26 Baker Material Handling Corporation Hydraulic valve bank
DE4128656C2 (en) * 1991-08-29 1994-10-20 Bosch Gmbh Robert Hydraulic actuating device and its use
US5188015A (en) * 1991-12-26 1993-02-23 Kelley Company, Inc. Automatically sequenced hydraulic cylinder mechanism
US11618232B2 (en) 2017-08-01 2023-04-04 Moog Gmbh Apparatus for controlling the switch-over of hydraulic cylinders

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2391923A (en) * 1943-05-27 1946-01-01 Cleaners Hanger Company Garment hanger
US2645900A (en) * 1947-04-05 1953-07-21 Loyd E Hutchison Hydraulic type fluid transmission
DE828188C (en) * 1948-10-02 1952-01-17 Toussaint & Hess Gmbh Hydraulic working piston
US2770222A (en) * 1953-05-13 1956-11-13 Anderson James Hydraulic system of lathes and other metal working machines, presses, and the like

Also Published As

Publication number Publication date
US3033170A (en) 1962-05-08
CH355352A (en) 1961-06-30
NL243893A (en)

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