US3033170A - Hydraulic ram apparatus - Google Patents

Hydraulic ram apparatus Download PDF

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Publication number
US3033170A
US3033170A US842509A US84250959A US3033170A US 3033170 A US3033170 A US 3033170A US 842509 A US842509 A US 842509A US 84250959 A US84250959 A US 84250959A US 3033170 A US3033170 A US 3033170A
Authority
US
United States
Prior art keywords
piston
valve
ram
pressure
seating
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 - Lifetime
Application number
US842509A
Other languages
English (en)
Inventor
Norton Henry
Norton Hubert Veare
Norton Leslie Buckingham
Norton Douglas Edwin
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
Application granted granted Critical
Publication of US3033170A publication Critical patent/US3033170A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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

Definitions

  • a preferred form of the invention provides a fast approach during the working stroke.
  • this form of the invention there is a source of hydraulic fluid at low pressure communicating with the ram chamber of larger effective area through a non-return valve.
  • a non-return valve In such apparatus there may be an unloader valve between the supply of hydraulic fluid at low pressure and the last mentioned non-return valve, to unload the said supply when this non-return valve is closed.
  • FIGURES 4 and 5 The apparatus shown in FIGURES 4 and 5 is intended to provide a fast approach, and includes some other refinements. Its basic parts are essentially the same as those of the apparatus of ⁇ FIGURES 1 to 3, with some additions.
  • a low pressure pump 5 which is connected through a low pressure unloader valve 51 and a non-return valve 52 to a line 53 which leads to the upper ram chamber 17 via the line 25.
  • the low pressure unloader valve S1 has a valve member Se which is urged towards a seating 55 by a spring 56 and which is provided with a grooved stem 57 so that when it is lifted from its seating in a manner to be described, low pressure fluid can escape from the valve 51 through a return line 58.
  • Hydraulic double acting ram apparatus comprising a ram cylinder having a side wall and end Walls, a piston in said cylinder, a piston rod extending from said piston through one of said end walls, said cylinder, said piston and said piston rod defining a first ram chamber and a second ram chamber of smaller effective area than said iirst ram chamber, connecting passage means between said first and second ram chambers, automatic pressuresensitive unloader valve means disposed in said eonnecting passage means and having an inlet side connected to said second ram chamber, said valve means having an open condition maintained at above a predetermined pressure in said second ram chamber and a closed condition maintained at below said predetermined pressure, said valve means in said open condition permitting ow of hydraulic fluid in the direction from said second ram chamber to said first ram chamber, and in said closed position preventing such flow, said valve means being adapted to be brought into said open condition only on the attainment of a high pressure subtsantially in excess of said predetermined pressure applied to said inlet side, a

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Pressure Circuits (AREA)
US842509A 1958-10-01 1959-09-25 Hydraulic ram apparatus Expired - Lifetime US3033170A (en)

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
US3033170A true US3033170A (en) 1962-05-08

Family

ID=10378803

Family Applications (1)

Application Number Title Priority Date Filing Date
US842509A Expired - Lifetime US3033170A (en) 1958-10-01 1959-09-25 Hydraulic ram apparatus

Country Status (4)

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

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3494259A (en) * 1966-10-29 1970-02-10 Mitsubishi Heavy Ind Ltd Method of providing equal flow to hydraulic cylinders
US3495634A (en) * 1966-06-20 1970-02-17 John G Hurst Level sensitive control apparatus
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
US5115720A (en) * 1990-04-02 1992-05-26 Baker Material Handling Corporation Hydraulic valve bank
US5188015A (en) * 1991-12-26 1993-02-23 Kelley Company, Inc. Automatically sequenced hydraulic cylinder mechanism
US5421294A (en) * 1991-08-29 1995-06-06 Robert Bosch Gmbh Hydraulic setting device
CN110831750A (zh) * 2017-08-01 2020-02-21 穆格股份有限公司 用于控制液压缸切换的装置

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3836601C1 (OSRAM) * 1988-10-27 1990-01-04 Index-Werke Kg Hahn & Tessky, 7300 Esslingen, De

Citations (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
DE828188C (de) * 1948-10-02 1952-01-17 Toussaint & Hess Gmbh Hydraulischer Arbeitskolben
US2645900A (en) * 1947-04-05 1953-07-21 Loyd E Hutchison Hydraulic type fluid transmission
US2770222A (en) * 1953-05-13 1956-11-13 Anderson James Hydraulic system of lathes and other metal working machines, presses, and the like

Patent Citations (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 (de) * 1948-10-02 1952-01-17 Toussaint & Hess Gmbh Hydraulischer Arbeitskolben
US2770222A (en) * 1953-05-13 1956-11-13 Anderson James Hydraulic system of lathes and other metal working machines, presses, and the like

Cited By (13)

* 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
US3494259A (en) * 1966-10-29 1970-02-10 Mitsubishi Heavy Ind Ltd Method of providing equal flow to hydraulic cylinders
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
US4065010A (en) * 1975-03-17 1977-12-27 Massey-Ferguson Inc. Swing valve circuit
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
US5115720A (en) * 1990-04-02 1992-05-26 Baker Material Handling Corporation Hydraulic valve bank
US5421294A (en) * 1991-08-29 1995-06-06 Robert Bosch Gmbh Hydraulic setting device
US5188015A (en) * 1991-12-26 1993-02-23 Kelley Company, Inc. Automatically sequenced hydraulic cylinder mechanism
CN110831750A (zh) * 2017-08-01 2020-02-21 穆格股份有限公司 用于控制液压缸切换的装置
US11618232B2 (en) 2017-08-01 2023-04-04 Moog Gmbh Apparatus for controlling the switch-over of hydraulic cylinders

Also Published As

Publication number Publication date
CH355352A (fr) 1961-06-30
NL243893A (OSRAM)
GB872951A (en) 1961-07-12

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