FR2425565A1 - Control for hydraulic press - has valve which brings ram to rest by reducing pressure on upper surface - Google Patents

Control for hydraulic press - has valve which brings ram to rest by reducing pressure on upper surface

Info

Publication number
FR2425565A1
FR2425565A1 FR7813607A FR7813607A FR2425565A1 FR 2425565 A1 FR2425565 A1 FR 2425565A1 FR 7813607 A FR7813607 A FR 7813607A FR 7813607 A FR7813607 A FR 7813607A FR 2425565 A1 FR2425565 A1 FR 2425565A1
Authority
FR
France
Prior art keywords
ram
rest
valve
hydraulic press
brings
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
FR7813607A
Other languages
French (fr)
Other versions
FR2425565B1 (en
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.)
Renault SAS
Original Assignee
Renault SAS
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 Renault SAS filed Critical Renault SAS
Priority to FR7813607A priority Critical patent/FR2425565A1/en
Publication of FR2425565A1 publication Critical patent/FR2425565A1/en
Application granted granted Critical
Publication of FR2425565B1 publication Critical patent/FR2425565B1/fr
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
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/20—Other details, e.g. assembly with regulating devices
    • F15B15/24—Other details, e.g. assembly with regulating devices for restricting the stroke
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Presses (AREA)

Abstract

Hydraulic press has a ram whose upper face has a larger area than the annular lower face. During the working stroke an equal pressure is applied to both faces so that there is a greater force on the larger area to push the ram downwards. As the ram reaches the end of its stroke, an arm actuates the fluid supply valve through the rod. This valve reduces the pressure on the upper surface until there is an equilibrium of axial forces on the ram so that it is brought to rest.
FR7813607A 1978-05-09 1978-05-09 Control for hydraulic press - has valve which brings ram to rest by reducing pressure on upper surface Granted FR2425565A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7813607A FR2425565A1 (en) 1978-05-09 1978-05-09 Control for hydraulic press - has valve which brings ram to rest by reducing pressure on upper surface

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7813607A FR2425565A1 (en) 1978-05-09 1978-05-09 Control for hydraulic press - has valve which brings ram to rest by reducing pressure on upper surface

Publications (2)

Publication Number Publication Date
FR2425565A1 true FR2425565A1 (en) 1979-12-07
FR2425565B1 FR2425565B1 (en) 1981-05-29

Family

ID=9208005

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7813607A Granted FR2425565A1 (en) 1978-05-09 1978-05-09 Control for hydraulic press - has valve which brings ram to rest by reducing pressure on upper surface

Country Status (1)

Country Link
FR (1) FR2425565A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2550972A1 (en) * 1983-08-24 1985-03-01 Amada Co Ltd
DE3520128A1 (en) * 1985-06-05 1986-12-11 Wilhelm 7243 Vöhringen Lupold Hydraulic actuating drive
EP1138958A2 (en) * 2000-03-30 2001-10-04 Euromac S.r.l. Fluid-operated circuit for setting the top and bottom dead center location of the punch actuation cylinder in punching machines
EP1308635A3 (en) * 2001-11-02 2006-04-19 Euromac S.p.A. Improvement in a copying distributor spool in hydraulic circuits for controlling hammer motion in punching machines

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB653015A (en) * 1948-04-23 1951-05-09 British Industrial Plastics Improved means for controlling application of pressure to hydraulic rams
US2810930A (en) * 1950-10-06 1957-10-29 Mortimer D Macdonald Press having thickness control means
DE1169256B (en) * 1960-11-16 1964-04-30 Eitel K G Hydraulic straightening press
DE2101832A1 (en) * 1970-01-16 1971-07-22 Catomance Ltd., Welwyn Garden City, Hertfordshire (Grossbritannien) Substituted aromatic compounds

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB653015A (en) * 1948-04-23 1951-05-09 British Industrial Plastics Improved means for controlling application of pressure to hydraulic rams
US2810930A (en) * 1950-10-06 1957-10-29 Mortimer D Macdonald Press having thickness control means
DE1169256B (en) * 1960-11-16 1964-04-30 Eitel K G Hydraulic straightening press
DE2101832A1 (en) * 1970-01-16 1971-07-22 Catomance Ltd., Welwyn Garden City, Hertfordshire (Grossbritannien) Substituted aromatic compounds

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2550972A1 (en) * 1983-08-24 1985-03-01 Amada Co Ltd
DE3520128A1 (en) * 1985-06-05 1986-12-11 Wilhelm 7243 Vöhringen Lupold Hydraulic actuating drive
EP1138958A2 (en) * 2000-03-30 2001-10-04 Euromac S.r.l. Fluid-operated circuit for setting the top and bottom dead center location of the punch actuation cylinder in punching machines
EP1138958A3 (en) * 2000-03-30 2004-01-14 Euromac S.r.l. Fluid-operated circuit for setting the top and bottom dead center location of the punch actuation cylinder in punching machines
EP1308635A3 (en) * 2001-11-02 2006-04-19 Euromac S.p.A. Improvement in a copying distributor spool in hydraulic circuits for controlling hammer motion in punching machines

Also Published As

Publication number Publication date
FR2425565B1 (en) 1981-05-29

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Legal Events

Date Code Title Description
ST Notification of lapse