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 surfaceInfo
- 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
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.
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)
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)
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 |
-
1978
- 1978-05-09 FR FR7813607A patent/FR2425565A1/en active Granted
Patent Citations (4)
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)
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 |