GB1156998A - An Improved Rolling Mill and Method of Operating it - Google Patents

An Improved Rolling Mill and Method of Operating it

Info

Publication number
GB1156998A
GB1156998A GB4801566A GB4801566A GB1156998A GB 1156998 A GB1156998 A GB 1156998A GB 4801566 A GB4801566 A GB 4801566A GB 4801566 A GB4801566 A GB 4801566A GB 1156998 A GB1156998 A GB 1156998A
Authority
GB
United Kingdom
Prior art keywords
control
rolls
photo
cell
switch
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
GB4801566A
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.)
ABB Norden Holding AB
Original Assignee
ASEA AB
Allmanna Svenska Elektriska AB
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 ASEA AB, Allmanna Svenska Elektriska AB filed Critical ASEA AB
Publication of GB1156998A publication Critical patent/GB1156998A/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
    • B21B37/48—Tension control; Compression control
    • B21B37/52—Tension control; Compression control by drive motor control
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2273/00—Path parameters
    • B21B2273/12—End of product

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Metal Rolling (AREA)

Abstract

1,156,998. Automatic control of rolling. ALLM€NNA SVENSKA ELEKTRISKA A. B. Oct. 26, 1966 [Sept. 15, 1966], No.48015/66. Heading G3R. A quantity dependent on the longitudinal stress in material passing between one pair of rolls is stored and compared with a later value of the quantity when the material is passing between two pairs of rolls, any deviation from a desired comparison being effective to control the drive of one of the roll pairs to restore the desired comparison. In Fig. 1, successive pairs of mill rolls 11, 12 are driven by electric motors 18, 19 supplied from Ward-Leonard or thyristor controllers 20, 21. The speed of drive is stabilised by tachometer generators 29, 30, controlling through amplifiers 31, 31, current feedback systems associated with motors 20, 21. When, initially, the start of the material reaches a photo-cell 16, the latter causes a switch 24 to open momentarily to apply to a digital store 22 a signal representative of the current of motor 18 which then corresponds to zero tension. Thereafter the stored signal is continuously compared at 27 with the instantaneous value of the current of motor 18 so that when the start of the material reaches a photo-cell 17, indicating that both sets of rolls engage the material, a switch 26 closes so that any changes in tension from a desired value, e.g. zero, are effective through an amplifier 33 to control the datum of the speed control system associated with motor 19 to restore the desired tension. Switch 26 re-opens when the end of the material passes a photo-cell 14 in readiness for control of the next piece. Control of hot or cold rolling, forward or reverse rolling, a plurality of roll sets, and thickness, are referred to.
GB4801566A 1966-09-15 1966-10-26 An Improved Rolling Mill and Method of Operating it Expired GB1156998A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE1239666A SE333601B (en) 1966-09-15 1966-09-15

Publications (1)

Publication Number Publication Date
GB1156998A true GB1156998A (en) 1969-07-02

Family

ID=20295673

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4801566A Expired GB1156998A (en) 1966-09-15 1966-10-26 An Improved Rolling Mill and Method of Operating it

Country Status (3)

Country Link
DE (1) DE1602020A1 (en)
GB (1) GB1156998A (en)
SE (1) SE333601B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2339201A1 (en) * 1976-01-21 1977-08-19 Asea Ab CONTROL DEVICE FOR USE IN THE MANUFACTURING OF STRIP MATERIALS
EP0290834A1 (en) * 1987-05-15 1988-11-17 DANIELI & C. OFFICINE MECCANICHE S.p.A. Method for regulating the pull in continuous rolling trains and rolling train which adopts said method
EP0372439A2 (en) * 1988-12-08 1990-06-13 Asea Brown Boveri Aktiengesellschaft Process control method for a continuous rolling mill

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4938978B1 (en) * 1970-08-29 1974-10-22
FR2354154A1 (en) * 1976-06-11 1978-01-06 Jeumont Schneider STRAIN-FREE LAMINATION PROCESS OF METALS AND DEVICE FOR IMPLEMENTING THIS PROCESS
DE2815341A1 (en) * 1978-04-10 1979-10-18 Bbc Brown Boveri & Cie PROCEDURE AND CIRCUIT ARRANGEMENT FOR REGULATING THE LONGITUDINAL FORCE BETWEEN ROLLING STANDS OF A CONTINUOUS ROLLING MILL WITH INDIVIDUAL DRIVES
DE4220121C2 (en) * 1992-06-16 1995-06-01 Elpro Ag Process for recording the actual tension value for a minimum tension control in a multi-stand continuous rolling mill

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2339201A1 (en) * 1976-01-21 1977-08-19 Asea Ab CONTROL DEVICE FOR USE IN THE MANUFACTURING OF STRIP MATERIALS
EP0290834A1 (en) * 1987-05-15 1988-11-17 DANIELI & C. OFFICINE MECCANICHE S.p.A. Method for regulating the pull in continuous rolling trains and rolling train which adopts said method
US4942543A (en) * 1987-05-15 1990-07-17 Danieli & C. Officine Meccaniche Spa And Ceda Spa Costruzioni Elettromeccaniche E Dispositivi D'automazione Method for regulating the pull in continuous rolling trains and rolling train which adopts said method
EP0372439A2 (en) * 1988-12-08 1990-06-13 Asea Brown Boveri Aktiengesellschaft Process control method for a continuous rolling mill
EP0372439A3 (en) * 1988-12-08 1992-12-02 Asea Brown Boveri Aktiengesellschaft Process control method for a continuous rolling mill

Also Published As

Publication number Publication date
SE333601B (en) 1971-03-22
DE1602020A1 (en) 1970-04-09

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Legal Events

Date Code Title Description
PS Patent sealed
PE Patent expired