JPS57195902A - Hydraulic system - Google Patents

Hydraulic system

Info

Publication number
JPS57195902A
JPS57195902A JP8156781A JP8156781A JPS57195902A JP S57195902 A JPS57195902 A JP S57195902A JP 8156781 A JP8156781 A JP 8156781A JP 8156781 A JP8156781 A JP 8156781A JP S57195902 A JPS57195902 A JP S57195902A
Authority
JP
Japan
Prior art keywords
valve
pressure
liquid
accumulator
pressurized
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
JP8156781A
Other languages
Japanese (ja)
Other versions
JPH0146722B2 (en
Inventor
Mamoru Nishikawa
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.)
Toyooki Kogyo Co Ltd
Original Assignee
Toyooki Kogyo 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 Toyooki Kogyo Co Ltd filed Critical Toyooki Kogyo Co Ltd
Priority to JP8156781A priority Critical patent/JPS57195902A/en
Publication of JPS57195902A publication Critical patent/JPS57195902A/en
Publication of JPH0146722B2 publication Critical patent/JPH0146722B2/ja
Granted 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
    • B30B15/18—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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Control Of Presses (AREA)
  • Press Drives And Press Lines (AREA)

Abstract

PURPOSE:To discharge the high pressure of liquid from the back chamber of an actuator after high-pressure press work without causing an impact, noise or the like, effectively use the energy of the high-pressure liquid at the time of the pressure discharge and facilitate the adjustment of a pressure-discharging restrictor valve or the like. CONSTITUTION:In a pressure discharge process, the solenoid 43 of a valve 7 does not act and the valve functions as a conventional check valve but the solenoid 44 of a changeover valve 4 acts to shift it to supply pressurized liquid to the external pilot port 34 of a sequence valve 5. At that time, a restrictor valve 15 acts to gradually supply the pressurized liquid to the external pilot port 34 and the sequence valve 5 is gradually opened to the full degree so that pressurized liquid returned from a cylinder 2 and that supplied from a high pressure source 16 are charged into an accumulator 1. Since some amount of pressurized liqid is previously charged in the accumulator 1, the impulsive or noisy sound in the release of high-pressure liquid from the back chamber of the cylinder 2 into the accumulator is reduced.
JP8156781A 1981-05-28 1981-05-28 Hydraulic system Granted JPS57195902A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8156781A JPS57195902A (en) 1981-05-28 1981-05-28 Hydraulic system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8156781A JPS57195902A (en) 1981-05-28 1981-05-28 Hydraulic system

Publications (2)

Publication Number Publication Date
JPS57195902A true JPS57195902A (en) 1982-12-01
JPH0146722B2 JPH0146722B2 (en) 1989-10-11

Family

ID=13749865

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8156781A Granted JPS57195902A (en) 1981-05-28 1981-05-28 Hydraulic system

Country Status (1)

Country Link
JP (1) JPS57195902A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6348004U (en) * 1986-09-16 1988-04-01
JP2014188555A (en) * 2013-03-27 2014-10-06 Ube Machinery Corporation Ltd Depressurization method in extrusion press
JP2017020544A (en) * 2015-07-08 2017-01-26 株式会社神戸製鋼所 Hydraulic transmission of work machine
WO2019102410A1 (en) * 2017-11-24 2019-05-31 Danieli & C. Officine Meccaniche S.P.A. Press for extruding metal material

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5660803U (en) * 1979-10-17 1981-05-23

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5660803U (en) * 1979-10-17 1981-05-23

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6348004U (en) * 1986-09-16 1988-04-01
JPH051682Y2 (en) * 1986-09-16 1993-01-18
JP2014188555A (en) * 2013-03-27 2014-10-06 Ube Machinery Corporation Ltd Depressurization method in extrusion press
JP2017020544A (en) * 2015-07-08 2017-01-26 株式会社神戸製鋼所 Hydraulic transmission of work machine
WO2019102410A1 (en) * 2017-11-24 2019-05-31 Danieli & C. Officine Meccaniche S.P.A. Press for extruding metal material
US11260441B2 (en) 2017-11-24 2022-03-01 Danieli & C. Officine Meccaniche S.P.A. Press for extruding metal material

Also Published As

Publication number Publication date
JPH0146722B2 (en) 1989-10-11

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