GB1243806A - Apparatus for controlling a rolling mill - Google Patents

Apparatus for controlling a rolling mill

Info

Publication number
GB1243806A
GB1243806A GB46710/68A GB4671068A GB1243806A GB 1243806 A GB1243806 A GB 1243806A GB 46710/68 A GB46710/68 A GB 46710/68A GB 4671068 A GB4671068 A GB 4671068A GB 1243806 A GB1243806 A GB 1243806A
Authority
GB
United Kingdom
Prior art keywords
gauge
calculated
stand
roll force
necessary
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
GB46710/68A
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.)
CBS Corp
Original Assignee
Westinghouse Electric Corp
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 Westinghouse Electric Corp filed Critical Westinghouse Electric Corp
Publication of GB1243806A publication Critical patent/GB1243806A/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
    • B21B37/16—Control of thickness, width, diameter or other transverse dimensions

Abstract

1,243,806. Automatic thickness control. WESTINGHOUSE ELECTRIC CORP. Oct.2, 1968 [Oct.23, 1967], No. 46710/68. Heading G3R. In a tandem or a reversing rolling mill, at least one rolling stand is controlled by a roll force gauge control system in which the roll force and the unloaded roll spacing are measured and a calculated delivery gauge is calculated therefrom and compared with the actual delivery gauge to derive a control signal to adjust the screwdown position of the rolls, if necessary. As shown in Fig. 1, a tandem rolling mill has n stands, each of which has a load cell LC for measuring the roll force and a screwdown position detector SPD. An X-ray gauge 20 measures the actual workpiece gauge at the exit of the last stand and the "mass flow" delivery gauge for each other stand is calculated using the speed of the workpiece at the stand as measured by a tachogenerator T, modified if necessary by a slip factor. Each stand is interrogated in turn in an automatic sequence under the control of a computer 18 and the "roll force" gauge is calculated making allowance, if necessary, for non-linearity of the mill spring. If the calculated "roll force" gauge is within a certain "validity" range (e.g. within 10% of the actual "mass flow" gauge), the screwdown position is adjusted, the amount of adjustment being determined by a weighted mean of the new screwdown offset (10%) and the previous one (90%). If the calculated gauge is outside the "validity" range, no adjustment is made and interrogation passes to the next stand.
GB46710/68A 1967-10-23 1968-10-02 Apparatus for controlling a rolling mill Expired GB1243806A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US67730867A 1967-10-23 1967-10-23
US87246169A 1969-11-24 1969-11-24

Publications (1)

Publication Number Publication Date
GB1243806A true GB1243806A (en) 1971-08-25

Family

ID=27101763

Family Applications (1)

Application Number Title Priority Date Filing Date
GB46710/68A Expired GB1243806A (en) 1967-10-23 1968-10-02 Apparatus for controlling a rolling mill

Country Status (3)

Country Link
US (1) US3600920A (en)
BE (1) BE722782A (en)
GB (1) GB1243806A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2167729A1 (en) * 1972-01-06 1973-08-24 Westinghouse Electric Corp Rolling control in metal strip prodn - with computer control based on plasticity of strip

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3568637A (en) * 1968-05-13 1971-03-09 Westinghouse Electric Corp Tandem mill force feed forward adaptive system
BE793762A (en) * 1972-11-06 1973-07-09 Westinghouse Electric Corp ROLLER GAUGE CONTROL PROCESS AND APPARATUS INCLUDING SPEED CORRECTION
US3892112A (en) * 1974-03-27 1975-07-01 Westinghouse Electric Corp Rolling mill gauge control
JPS52116761A (en) * 1976-03-26 1977-09-30 Hitachi Ltd System for controlling thickness of rolled plate
JPS55112111A (en) * 1979-02-23 1980-08-29 Hitachi Ltd Controller for continuous rolling mill

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB999761A (en) * 1961-04-13 1965-07-28 Davy And United Instr Ltd Control systems for rolling mills
US3208251A (en) * 1961-05-03 1965-09-28 Westinghouse Canada Ltd Rolling mill control system
US3186200A (en) * 1961-10-31 1965-06-01 Gen Electric Automatic thickness regulator for strip rolling mills
BE637694A (en) * 1962-09-21
US3332263A (en) * 1963-12-10 1967-07-25 Gen Electric Computer control system for metals rolling mill
US3328987A (en) * 1964-05-14 1967-07-04 Crucible Steel Co America Gage-control apparatus
US3357217A (en) * 1965-05-12 1967-12-12 Westinghouse Electric Corp Slave gauge control system for a rolling mill
US3330142A (en) * 1965-06-01 1967-07-11 Gen Electric Automatic zeroing for a rolling mill position regulator

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2167729A1 (en) * 1972-01-06 1973-08-24 Westinghouse Electric Corp Rolling control in metal strip prodn - with computer control based on plasticity of strip

Also Published As

Publication number Publication date
US3600920A (en) 1971-08-24
BE722782A (en) 1969-04-01

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