GB1394445A - Control systems - Google Patents

Control systems

Info

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
Application number
GB5102472A
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.)
Davy Loewy Ltd
Original Assignee
Davy Loewy Ltd
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 Davy Loewy Ltd filed Critical Davy Loewy Ltd
Priority to GB5102472A priority Critical patent/GB1394445A/en
Publication of GB1394445A publication Critical patent/GB1394445A/en
Expired legal-status Critical Current

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.
GB5102472A 1972-11-06 1972-11-06 Control systems Expired GB1394445A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (1)

* Cited by examiner, † Cited by third party
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