JPS5581100A - Hydraulic compressor and control device thereof - Google Patents

Hydraulic compressor and control device thereof

Info

Publication number
JPS5581100A
JPS5581100A JP15363478A JP15363478A JPS5581100A JP S5581100 A JPS5581100 A JP S5581100A JP 15363478 A JP15363478 A JP 15363478A JP 15363478 A JP15363478 A JP 15363478A JP S5581100 A JPS5581100 A JP S5581100A
Authority
JP
Japan
Prior art keywords
oil
pipe
diameter cylinder
piston
pressure
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
JP15363478A
Other languages
Japanese (ja)
Other versions
JPS5949120B2 (en
Inventor
Kaname Mitsunari
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.)
SAMU DENSHI KIKAI KK
Original Assignee
SAMU DENSHI KIKAI KK
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 SAMU DENSHI KIKAI KK filed Critical SAMU DENSHI KIKAI KK
Priority to JP15363478A priority Critical patent/JPS5949120B2/en
Publication of JPS5581100A publication Critical patent/JPS5581100A/en
Publication of JPS5949120B2 publication Critical patent/JPS5949120B2/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
    • B30B15/161—Control arrangements for fluid-driven presses controlling the ram speed and ram pressure, e.g. fast approach speed at low pressure, low pressing speed at high pressure

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Press Drives And Press Lines (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Presses And Accessory Devices Thereof (AREA)
  • Control Of Presses (AREA)

Abstract

PURPOSE: To increase the speed of piston movement under no-load state, by controlling the sending of pressure oil into cylinders according to the signal from a load detector provided on a piston rod which communicates the piston of small-diameter cylinder and the piston of large-diameter cylinder.
CONSTITUTION: Slightly opening a servo valve 9, pressure oil from an oil pressure source 8 is supplied into a cylinder 2 through a pressure oil pipe 10 to lower a piston 4 (set pressure switching valves 23, 24 are closed, switching valves 16, 17 are open, the oil in the lower chamber in the small-diameter cylinder 2 is sent back through pipe 11, oil is sucked into the upper chamber in the large-diameter cylinder 3 from pipe 14, and the oil is discharged from the lower chamber through pipe 15). Then, when a rod head 7 at the lower end of the piston rod 6 abuts against the work on the table and stops, it is detected by a load detector 25, of which output will fully open the servo valve 9, thereby operating the large-diameter cylinder 3 (set pressure switching valve 23 is opened, switching valve 16 is closed, oil is pumped into the upper chamber of large-diameter cylinder 3 through pipe 12, and oil is discharged from the lower chamber through pipe 15).
COPYRIGHT: (C)1980,JPO&Japio
JP15363478A 1978-12-14 1978-12-14 hydraulic compression device Expired JPS5949120B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15363478A JPS5949120B2 (en) 1978-12-14 1978-12-14 hydraulic compression device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15363478A JPS5949120B2 (en) 1978-12-14 1978-12-14 hydraulic compression device

Publications (2)

Publication Number Publication Date
JPS5581100A true JPS5581100A (en) 1980-06-18
JPS5949120B2 JPS5949120B2 (en) 1984-11-30

Family

ID=15566789

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15363478A Expired JPS5949120B2 (en) 1978-12-14 1978-12-14 hydraulic compression device

Country Status (1)

Country Link
JP (1) JPS5949120B2 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3734329A1 (en) * 1987-10-10 1989-04-20 Bosch Gmbh Robert HYDRAULIC CONTROL DEVICE FOR A PRESS
JPH01127118A (en) * 1987-10-21 1989-05-19 Daimler Benz Ag Drawing press for sheet metal part
JPH01130824A (en) * 1987-10-21 1989-05-23 Daimler Benz Ag Double acting press elastically deforming sheet
WO1997004951A1 (en) * 1995-07-25 1997-02-13 Komatsu Ltd. High-speed safety circuit for a hydraulic press
WO1999054123A1 (en) * 1998-04-07 1999-10-28 Mannesmann Rexroth Ag Method for operating a hydraulic press

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0474235U (en) * 1990-11-05 1992-06-29

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3734329A1 (en) * 1987-10-10 1989-04-20 Bosch Gmbh Robert HYDRAULIC CONTROL DEVICE FOR A PRESS
JPH01127118A (en) * 1987-10-21 1989-05-19 Daimler Benz Ag Drawing press for sheet metal part
JPH01130824A (en) * 1987-10-21 1989-05-23 Daimler Benz Ag Double acting press elastically deforming sheet
WO1997004951A1 (en) * 1995-07-25 1997-02-13 Komatsu Ltd. High-speed safety circuit for a hydraulic press
US5865088A (en) * 1995-07-25 1999-02-02 Komatsu Ltd. High-speed safety circuit for a hydraulic press
WO1999054123A1 (en) * 1998-04-07 1999-10-28 Mannesmann Rexroth Ag Method for operating a hydraulic press

Also Published As

Publication number Publication date
JPS5949120B2 (en) 1984-11-30

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