GB1394445A - Control systems - Google Patents
Control systemsInfo
- Publication number
- GB1394445A GB1394445A GB5102472A GB5102472A GB1394445A GB 1394445 A GB1394445 A GB 1394445A GB 5102472 A GB5102472 A GB 5102472A GB 5102472 A GB5102472 A GB 5102472A GB 1394445 A GB1394445 A GB 1394445A
- Authority
- GB
- United Kingdom
- Prior art keywords
- torque
- motors
- signals
- error signal
- nov
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/46—Roll speed or drive motor control
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B35/00—Drives for metal-rolling mills, e.g. hydraulic drives
- B21B2035/005—Hydraulic drive motors
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Fluid Gearings (AREA)
Abstract
1394445 Automatic control of speed and torque DAVY-LOEWY Ltd 1 Nov 1973 [6 Nov 1972] 51024/72 Heading G3R A rolling mill stand has independently driven working rolls with the driving motors controlled by a system which keeps the torques applied by the motors substantially equal and keeps the sum of the speeds of the motors constant at a given value. As shown the hydraulic motors 12 connected to the rolls are supplied by variable delivery (swash plate) pumps 13 whose swash plate angle is controlled by the control system. In the embodiment described the torque of the motors is signalled by means of pressure transducers 20, 21 and these torque signals are compared at 23 to provide a torque difference signal on line 24. The motor speeds are measured by tachometers 27 and the signals on lines 28 are added and compared with a reference value 31 in comparator 30 to provide a speed error signal on line 32. The signals on lines 24 and 32 are applied together through amplifiers 33, 26 to alter the swash plates of the pumps such that the speed error signal causes both pump outputs to charge in the same sense but the torque error signal causes charges in the opposite sense.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB5102472A GB1394445A (en) | 1972-11-06 | 1972-11-06 | Control systems |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB5102472A GB1394445A (en) | 1972-11-06 | 1972-11-06 | Control systems |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1394445A true GB1394445A (en) | 1975-05-14 |
Family
ID=10458338
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB5102472A Expired GB1394445A (en) | 1972-11-06 | 1972-11-06 | Control systems |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1394445A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2340777A1 (en) * | 1976-02-13 | 1977-09-09 | Bwg Bergwerk Walzwerk | LAMINATION PLANT FOR CONTINUOUS TAPE PROCESSING LINES |
-
1972
- 1972-11-06 GB GB5102472A patent/GB1394445A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2340777A1 (en) * | 1976-02-13 | 1977-09-09 | Bwg Bergwerk Walzwerk | LAMINATION PLANT FOR CONTINUOUS TAPE PROCESSING LINES |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |