JPS5659005A - Controller for hydraulic circuit including plural variable-capacity pumps in parallel - Google Patents

Controller for hydraulic circuit including plural variable-capacity pumps in parallel

Info

Publication number
JPS5659005A
JPS5659005A JP13661879A JP13661879A JPS5659005A JP S5659005 A JPS5659005 A JP S5659005A JP 13661879 A JP13661879 A JP 13661879A JP 13661879 A JP13661879 A JP 13661879A JP S5659005 A JPS5659005 A JP S5659005A
Authority
JP
Japan
Prior art keywords
pumps
oil
parallel
controller
circuit including
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.)
Granted
Application number
JP13661879A
Other languages
Japanese (ja)
Other versions
JPH0258482B2 (en
Inventor
Akira Asari
Tatsuhiko Noyori
Kiyoshi Gotoda
Masaru Takeda
Munenori Soejima
Masayuki Ekuma
Yasuhiro Nakajima
Masanobu Aoki
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.)
Kobe Steel Ltd
Original Assignee
Kobe Steel 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 Kobe Steel Ltd filed Critical Kobe Steel Ltd
Priority to JP13661879A priority Critical patent/JPS5659005A/en
Priority to EP19800303741 priority patent/EP0027743B1/en
Priority to DE8080303741T priority patent/DE3070650D1/en
Publication of JPS5659005A publication Critical patent/JPS5659005A/en
Publication of JPH0258482B2 publication Critical patent/JPH0258482B2/ja
Granted legal-status Critical Current

Links

Classifications

    • 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
    • F15B2211/20546—Type of pump variable capacity
    • F15B2211/20553—Type of pump variable capacity with pilot circuit, e.g. for controlling a swash plate
    • 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
    • F15B2211/3056—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
    • F15B2211/30575—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 in a Wheatstone Bridge arrangement (also half bridges)
    • 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
    • F15B2211/327—Directional control characterised by the type of actuation electrically or electronically
    • 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
    • F15B2211/50—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
    • F15B2211/515—Pressure control characterised by the connections of the pressure control means in the circuit
    • F15B2211/5153—Pressure control characterised by the connections of the pressure control means in the circuit being connected to an output member 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
    • F15B2211/55—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
    • F15B2211/60—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
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/63—Electronic controllers
    • F15B2211/6303—Electronic controllers using input signals
    • F15B2211/6336—Electronic controllers using input signals representing a state of the output member, e.g. position, speed or acceleration
    • 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
    • F15B2211/635—Circuits providing pilot pressure to pilot pressure-controlled fluid circuit elements
    • F15B2211/6355—Circuits providing pilot pressure to pilot pressure-controlled fluid circuit elements having valve 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
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/665—Methods of control using electronic components
    • F15B2211/6651—Control of the prime mover, e.g. control of the output torque or rotational speed
    • 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
    • F15B2211/665—Methods of control using electronic components
    • F15B2211/6653—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
    • F15B2211/70—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
    • F15B2211/7052—Single-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
    • F15B2211/705—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
    • 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
    • F15B2211/7107—Multiple output members, e.g. multiple hydraulic motors or cylinders the output members being mechanically linked
    • 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
    • F15B2211/7114—Multiple output members, e.g. multiple hydraulic motors or cylinders with direct connection between the chambers of different actuators
    • F15B2211/7128—Multiple output members, e.g. multiple hydraulic motors or cylinders with direct connection between the chambers of different actuators the chambers being connected in parallel
    • 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
    • F15B2211/80—Other types of control related to particular problems or conditions
    • F15B2211/88—Control measures for saving energy

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Positive-Displacement Pumps (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Control Of Presses (AREA)
  • Press Drives And Press Lines (AREA)

Abstract

PURPOSE: To always efficiently actuate pumps and reduce energy loss as much as possible, by loading only a minimum number of pumps and unloading the residual pumps depending on the operating speed of a hydraulic working machine, namely, on the quantity of necessary oil.
CONSTITUTION: Oil discharged from variable-capacity pumps 11W14 connected in parallel with one another is supplied to the cylinders 61W63 of an extrusion press 6 to actuate a stem 64. To control the speed of the stem 64, namely, the quantity of supplied oil to the cylinders 61W63, the opening and closing of loading change-over control valves 41W44 are regulated and the discharge quantities of the pumps 11W 14 are regulated by control units 31W34. When the quantity of necessary oil is not more than the maximum discharge quantity of single pump, the solenoid valve 41 is energized to load only one pump 11 and the other solenoid valves 42W44 are deenergized to unload the other pumps 12W14. Similarly, only a minimum number of pumps are loaded depending on the quantity of necessary oil to perform operation.
COPYRIGHT: (C)1981,JPO&Japio
JP13661879A 1979-10-22 1979-10-22 Controller for hydraulic circuit including plural variable-capacity pumps in parallel Granted JPS5659005A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP13661879A JPS5659005A (en) 1979-10-22 1979-10-22 Controller for hydraulic circuit including plural variable-capacity pumps in parallel
EP19800303741 EP0027743B1 (en) 1979-10-22 1980-10-22 Control system for a hydraulic circuit including a plurality of parallel variable-delivery pumps
DE8080303741T DE3070650D1 (en) 1979-10-22 1980-10-22 Control system for a hydraulic circuit including a plurality of parallel variable-delivery pumps

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13661879A JPS5659005A (en) 1979-10-22 1979-10-22 Controller for hydraulic circuit including plural variable-capacity pumps in parallel

Publications (2)

Publication Number Publication Date
JPS5659005A true JPS5659005A (en) 1981-05-22
JPH0258482B2 JPH0258482B2 (en) 1990-12-07

Family

ID=15179505

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13661879A Granted JPS5659005A (en) 1979-10-22 1979-10-22 Controller for hydraulic circuit including plural variable-capacity pumps in parallel

Country Status (3)

Country Link
EP (1) EP0027743B1 (en)
JP (1) JPS5659005A (en)
DE (1) DE3070650D1 (en)

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5821505U (en) * 1981-08-04 1983-02-09 富士レビオ株式会社 bottle
JPS58174704A (en) * 1982-04-07 1983-10-13 Uchida Yuatsu Kiki Kogyo Kk Flow control method in confluence circuit
JPS60208605A (en) * 1984-03-31 1985-10-21 Ishikawajima Harima Heavy Ind Co Ltd On-deck machinery control equipment for ship
JPS60245806A (en) * 1984-05-18 1985-12-05 Nissei Plastics Ind Co Converging circuit
JPS60245805A (en) * 1984-05-18 1985-12-05 Nissei Plastics Ind Co Converging circuit
JPS6353002U (en) * 1986-09-24 1988-04-09
JPH0377076U (en) * 1989-11-27 1991-08-01
JPH0469684U (en) * 1990-10-30 1992-06-19
US5165320A (en) * 1989-01-19 1992-11-24 Danfoss A/S Fluid-controlled servo-arrangement
US6270454B1 (en) 1994-07-04 2001-08-07 Asahi Kogaku Kogyo Kabushiki Kaisha Portable endoscope system
JP2010164086A (en) * 2009-01-13 2010-07-29 Isuzu Motors Ltd Plunger mechanism for combining multiple thrust
WO2012173005A1 (en) * 2011-06-15 2012-12-20 宇部興産機械株式会社 Extrusion press
JP2013091070A (en) * 2011-10-25 2013-05-16 Ube Machinery Corporation Ltd Method for controlling extrusion press
WO2014168058A1 (en) * 2013-04-11 2014-10-16 日立建機株式会社 Apparatus for driving work machine
JP2015520028A (en) * 2012-05-10 2015-07-16 エスエムエス メア ゲーエムベーハー Hydraulic extruder and method of operating a hydraulic extruder
WO2016072354A1 (en) * 2014-11-03 2016-05-12 日本エアロフォージ株式会社 Hydraulic forging press device and method for controlling same
JP2017094464A (en) * 2015-11-26 2017-06-01 株式会社モリタ環境テック Cutting processing device and operating method of cutting processing device
JP2018114521A (en) * 2017-01-17 2018-07-26 宇部興産機械株式会社 Extrusion speed control method of main ram on extrusion press and extrusion press
JP2019531903A (en) * 2016-10-18 2019-11-07 オートメーション、プレス・アンド・トゥーリング、エーピー・アンド・ティー・アーベー Servo hydraulic press
JP2020192603A (en) * 2020-02-20 2020-12-03 宇部興産機械株式会社 Extrusion press device
US11016282B2 (en) 2015-10-28 2021-05-25 Acera LLC Handheld mobile light source

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3614967C2 (en) * 1986-05-02 1994-08-18 Paals Packpressen Fabrik Gmbh Baler
US5128335A (en) * 1990-10-15 1992-07-07 Merck & Co., Inc. 2-heteroarylphenyl-carbapenem antibacterial agents
US6128900A (en) * 1998-01-28 2000-10-10 Case Corporation Hydraulic fluid supply system
AT411784B (en) * 2000-05-03 2004-05-25 Weber Walter CONTROL DEVICE FOR DOUBLE-ACTING HYDRAULIC WORKING CYLINDERS
JP2011224644A (en) * 2010-04-23 2011-11-10 Ube Machinery Corporation Ltd Extrusion press device
CN111572083B (en) * 2020-04-17 2021-04-13 江苏国力锻压机床有限公司 Hydraulic press for glass fiber reinforced plastic products

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5091010A (en) * 1973-12-17 1975-07-21
JPS526890A (en) * 1975-07-07 1977-01-19 Hitachi Ltd Speed control device for an apparatus driven by oil pressure
JPS5432806U (en) * 1977-08-08 1979-03-03

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2947317A (en) * 1953-06-12 1960-08-02 Electraulic Presses Ltd Unloading valves for hydraulic pumps
US2811838A (en) * 1954-06-15 1957-11-05 American Steel Foundries Hydraulic press circuit
FR1410250A (en) * 1964-06-16 1965-09-10 Compteurs Comp D Automatic control device of a pumping station
US3744932A (en) * 1971-04-30 1973-07-10 Prevett Ass Inc Automatic sequence control system for pump motors and the like
JPS5364241A (en) * 1976-11-19 1978-06-08 Denki Kagaku Kogyo Kk Adhesive compositions

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5091010A (en) * 1973-12-17 1975-07-21
JPS526890A (en) * 1975-07-07 1977-01-19 Hitachi Ltd Speed control device for an apparatus driven by oil pressure
JPS5432806U (en) * 1977-08-08 1979-03-03

Cited By (33)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5821505U (en) * 1981-08-04 1983-02-09 富士レビオ株式会社 bottle
JPS58174704A (en) * 1982-04-07 1983-10-13 Uchida Yuatsu Kiki Kogyo Kk Flow control method in confluence circuit
JPS60208605A (en) * 1984-03-31 1985-10-21 Ishikawajima Harima Heavy Ind Co Ltd On-deck machinery control equipment for ship
JPH0448966B2 (en) * 1984-05-18 1992-08-10 Nitsusei Jushi Kogyo Kk
JPS60245805A (en) * 1984-05-18 1985-12-05 Nissei Plastics Ind Co Converging circuit
JPH0379561B2 (en) * 1984-05-18 1991-12-19 Nitsusei Jushi Kogyo Kk
JPS60245806A (en) * 1984-05-18 1985-12-05 Nissei Plastics Ind Co Converging circuit
JPS6353002U (en) * 1986-09-24 1988-04-09
US5165320A (en) * 1989-01-19 1992-11-24 Danfoss A/S Fluid-controlled servo-arrangement
JPH0377076U (en) * 1989-11-27 1991-08-01
JPH0469684U (en) * 1990-10-30 1992-06-19
US6270454B1 (en) 1994-07-04 2001-08-07 Asahi Kogaku Kogyo Kabushiki Kaisha Portable endoscope system
JP2010164086A (en) * 2009-01-13 2010-07-29 Isuzu Motors Ltd Plunger mechanism for combining multiple thrust
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Also Published As

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JPH0258482B2 (en) 1990-12-07
EP0027743A1 (en) 1981-04-29
EP0027743B1 (en) 1985-05-15
DE3070650D1 (en) 1985-06-20

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