GB1306297A - - Google Patents
Info
- Publication number
- GB1306297A GB1306297A GB1306297DA GB1306297A GB 1306297 A GB1306297 A GB 1306297A GB 1306297D A GB1306297D A GB 1306297DA GB 1306297 A GB1306297 A GB 1306297A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pressure
- valve
- press
- actuators
- working
- 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.)
- Expired
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
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
- F15B11/22—Synchronisation of the movement of two or more servomotors
-
- 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
- B30B15/24—Control arrangements for fluid-driven presses controlling the movement of a plurality of actuating members to maintain parallel movement of the platen or press beam
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
Abstract
1306297 Hydraulic presses VEREINIGTE OSTERREICHISCHE EISEN-UND STAHLWERKE AG 9 April 1970 16862/70 Heading B5F [Also in Division B3] In a press brake, flanging press or shearing machine two hydraulic actuators 1, 2 acting on a tool or workpiece are supplied with hydraulic fluid simultaneously during the working and return strokes and are connected to a common pressure comparing valve 23 which has two pressure inlets 21, 22 and an outlet 26 to an oil pump 27 via a shut-off valve 28 which opens only when the working stroke has been completed. This control prevents any damage to the press tools due to pressure surges and any uncontrolled movement of the tool e.g. the bending beam, as a result of any unilateral loading of the press during its reversal. A pump 10 driven by a motor 9 supplies pressure fluid to the actuators via a main three-position control valve 13 and a flow control valve 16. The electric control circuit ensures that the main valve 13 is not moved to another position until the pressures in the actuators have been equalized. A pressure relief valve 29 controls the working pressure of the hydraulic fluid.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1686270 | 1970-04-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1306297A true GB1306297A (en) | 1973-02-07 |
Family
ID=10085038
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1306297D Expired GB1306297A (en) | 1970-04-09 | 1970-04-09 |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1306297A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103470560A (en) * | 2013-09-25 | 2013-12-25 | 徐州重型机械有限公司 | Crane and power hydraulic system thereof |
-
1970
- 1970-04-09 GB GB1306297D patent/GB1306297A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103470560A (en) * | 2013-09-25 | 2013-12-25 | 徐州重型机械有限公司 | Crane and power hydraulic system thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |