US2851911A - Rolling mills - Google Patents

Rolling mills Download PDF

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Publication number
US2851911A
US2851911A US483910A US48391055A US2851911A US 2851911 A US2851911 A US 2851911A US 483910 A US483910 A US 483910A US 48391055 A US48391055 A US 48391055A US 2851911 A US2851911 A US 2851911A
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United States
Prior art keywords
strip
thickness
potentiometer
mill
signal
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 - Lifetime
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US483910A
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English (en)
Inventor
Hessenberg Wilfred C Frederick
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.)
British Iron and Steel Research Association BISRA
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British Iron and Steel Research Association BISRA
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 British Iron and Steel Research Association BISRA filed Critical British Iron and Steel Research Association BISRA
Application granted granted Critical
Publication of US2851911A publication Critical patent/US2851911A/en
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Expired - Lifetime legal-status Critical Current

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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
    • B21B37/165—Control of thickness, width, diameter or other transverse dimensions responsive mainly to the measured thickness of the product
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S425/00—Plastic article or earthenware shaping or treating: apparatus
    • Y10S425/235—Calendar

Definitions

  • Rolling mills may be :so. arranged. that the, rolled material .is ,passing ;throngh. a number .of.,.individual. roll standstat thesame time.
  • the continuous ..st rip,.,mill-.in .which the strip: passes ,simultaneously through several astandssarranged in tandem is a..well,known example.
  • One of the objects of continuous rolling isnto aproduce long lengths of .materialhaving a desired-:cross-section .which varies.v as .little :as .possible, ,from zone, end ;to ,the other. -,.In a. .tandem strip, .mill, changes;in...thickness,may occur as the. resultof disturbances in.one..or,-more-.of .the. roll ;s,tands... and Lit ;.is .desirable; that .these..should .be. corrected ,before Ithe materiahissues 1mm hegdast stand.
  • a Obiechof .thisinvention is .to ,provide, a, method fona'chievingithis.
  • the present invention employs the above -features-- to provide apparatus -or a measuring the issuing thickness c of strip from a -rolling mill and for controlling-"the; mill tormaintaina strip-thickness at a----'de”sired value.
  • the invention includes apparatus for maintaining at the desired value the thickness of wide strip leaving a multi-stand rolling mill comprising means for producing signals in accordance with the speed (v and the thickness (h of the strip between two adjacent .stands of the mill, means for producing a signal in accordance with the speed of the strip (v leaving the mill, means for compounding the said signals to produce a resultant signal, representing the issuing thickness, in accordance with Patented Sept. 16, 1958 and means controlled by the resultant signal for maintaining the issuing thickness at the desiredvalue.
  • the rolls of the stands of the mill are indicated at 12a, 12b, 12c etc., it being understood that. :the mill may have as many stands as may be desirable. Between any two adjacent stands, there are located a micrometer 13 which gives an electrical signal on the output lines 14 in accordance with the thickness of the strip 15 between those stands, and a device for giving an electric signal proportional to the. linear. speed Jofia'the, 'stripas; itpasses between the-stands. This.
  • the device consists, of a discjl6' mounted on the rotor-ofa tachometric generator17, the arrangement being such that theplane 'of'the disc 16 is aligned with the direction of motion a-ofthe;strip15 and ,thedisc rotatesatthe ,same peripheral This speed as the strip.
  • the micrometer13 and thedevice .16, 17 are shown between the last twostands of the mill, but it will be understood that they maybe located between any two-other stands.
  • This device is similar to the device 16, 17 andcomprises a disc .18 in. frictional contact-with the strip and carried onthe motor of a tachometric generator, 19.
  • the signal appearing betweenthe slider 26 ofthe potentiometer and tone endof the potentiometer is applied inseriesopposi- .tiontolhe output from generator,17 to. the input of..a high gain amplifier 27, the output from which is .connected to a light motor 28.
  • the rotor shaftof motor .28 carries the slider 26 of potentiometer 25 and also .the.slider- 29 of a second arcuate potentiometer 30.
  • the ;electric 1signal appearing on the output lines 14-of micronl ter, 13 is applied across potentiometer. 30,and, the signalappearing on the slider 29,and;one end ,:of'the potentiometer is proportional to the outgoing thickness .of..the..s trip and an indication of that thickness can :be
  • a signal may be derived proportional to thei.de,viation of the issuingthickness ,froma, given value ,by connecting slider 29 and one. side of .the po- .tentiometer 30 ,in series opposition, to. a. source. ofvolt- ,age indicated in the vdrawing as a battery-32, connected acrossthe. potentiometer 33. .
  • the signal appearing on lines 35 may be applied to the reeler motor 21, as shown, or alternatively to any of the screw-down motors 23 of the roll stands or to any of the drive motors 22, as indicated in chain line.
  • the operation of the system is as follows. If the speed and thickness of the strip between stands 12a and 12b are v I1 and the speed and thickness of the strip, as it leaves the mill, are v and k then the voltage applied across potentiometer 25 is V proportional to v and the voltage appearing between slider arm 26 and one end of the potentiometer is kV where k is determined by the position of the slider on the potentiometer.
  • the voltage applied the input of amplifier 27 is therefore proportional to (V kV where V is proportional to v as the gain of the amplifier 27 is large the angular position of the rotor shaft of motor 28 will be since at balance the input to the amplifier will be very nearly zero.
  • the potentiometer 33 When used, the potentiometer 33 applies a constant voltage h in opposition to the voltage from potentiometer 30 and the signal appearing at output lines 35 is therefore h h, the deviation of the thickness from a given value.
  • the rolling mill will operate to maintain the output signal on lines 35 zero or, in other words, the issuing thickness of the strip at the desired value h, determined by the position of the slider 34.
  • the system illustrated in the accompanying drawing enables the thickness or gauge of the strip leaving the mill to be measured indirectly with the attendant advantage that the strip thickness is measured as it leaves the last roll stand and not at some distance from that stand.
  • This advantage is of particular value when the system is used for automatic control of the mill as it enables irregularities in the thickness to be compensated immediately instead of after a time lag.
  • the micrometer and the two speedometers are employed as before, but in this case percentage variations are measured.
  • the signals from the micrometer and speedometer located between the stands are compounded to give a resultant signal equal to the output (v xh From this resultant signal is obtained a signal proportional to the percentage variation of the output from a given value, the given value corresponding to a desired thickness.
  • the signal from the speedometer measuring the speed of the issuing strip is modified to give a signal proportional to the percentage variation in the issuing strip thickness from the given value, again corresponding to the desired thickness.
  • the two percentage signals are applied in series opposition to give a difference signal proportional to the percentage variation of the issuing thickness of the strip from the desired value. This signal can be applied to the reeling motor or to the screw-down or driving motors of the stands to compensate automatically for variations in the thickness and to maintain that variation zero.
  • a rolling mill having a motor operated final stand and at least one motor operated preliminary stand, manually adjustable means for controlling the thickness of the strip issuing from said final stand, first variable signal generating means responsive to the velocity of a partially finished strip supplied to said final stand, second variable signal generating means responsive to the thickness of said strip supplied to said final stand, third variable signal generating means responsive to the velocity of the strip issuing from said final stand, and a signal correlating means responsive to the setting of said manually adjustable means and all of said signal generating means, said correlating means varying the speed of operation of said final stand motor so as to maintain the product of the thickness and velocity of said issuing strip constant to the product of the thickness and velocity of said supplied strip.
  • said signal correlating means comprises a motor having a rotor, the position of said rotor being adjustable in response to changes in the difference between the signals produced by said first and third signal generating means, and a potentiometer having a slider coupled to said rotor, said second signal generating means comprising a source of voltage across said potentiometer, the difierence in the signals generated by said first and third signal generating means being detectable across said slider and one terminal of said potentiometer.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Metal Rolling (AREA)
US483910A 1954-01-26 1955-01-25 Rolling mills Expired - Lifetime US2851911A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2323/54A GB780486A (en) 1954-01-26 1954-01-26 Improvements in or relating to rolling mills

Publications (1)

Publication Number Publication Date
US2851911A true US2851911A (en) 1958-09-16

Family

ID=9737527

Family Applications (2)

Application Number Title Priority Date Filing Date
US25075D Expired USRE25075E (en) 1954-01-26 Rolling mills
US483910A Expired - Lifetime US2851911A (en) 1954-01-26 1955-01-25 Rolling mills

Family Applications Before (1)

Application Number Title Priority Date Filing Date
US25075D Expired USRE25075E (en) 1954-01-26 Rolling mills

Country Status (5)

Country Link
US (2) US2851911A (de)
BE (1) BE535052A (de)
DE (1) DE1118866B (de)
FR (1) FR1142917A (de)
GB (1) GB780486A (de)

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3000243A (en) * 1955-09-09 1961-09-19 Westinghouse Electric Corp Sheet length controller
US3015974A (en) * 1958-09-18 1962-01-09 Gen Electric Automatic control system for rolling mills and adjustable dies
US3024680A (en) * 1958-06-02 1962-03-13 Ind Nuclconics Corp Process measurement and control
US3030836A (en) * 1957-07-08 1962-04-24 Jones & Laughlin Steel Corp Continuous strip gauge control means
US3036481A (en) * 1958-11-21 1962-05-29 George P Dirth Gage control system for strip mill
US3045517A (en) * 1957-05-29 1962-07-24 Westinghouse Electric Corp Strip thickness control apparatus
US3049950A (en) * 1957-09-17 1962-08-21 British Aluminium Co Ltd Manufacture of metal sheet or strip
US3054311A (en) * 1959-04-17 1962-09-18 Allegheny Ludlum Steel Automatic control system for rolling mills and adjustable dies with automatic error detection
US3054310A (en) * 1959-05-21 1962-09-18 Industrial Nucleonics Corp Control system
US3062078A (en) * 1957-10-16 1962-11-06 Westinghouse Canada Ltd Material thickness control apparatus
US3078746A (en) * 1958-11-21 1963-02-26 George P Dirth Gage control system for strip mill
US3078747A (en) * 1957-09-17 1963-02-26 British Aluminium Co Ltd Manufacture of metal sheet or strip
US3089363A (en) * 1957-05-29 1963-05-14 Westinghouse Electric Corp Strip thickness control apparatus
US3096670A (en) * 1957-07-16 1963-07-09 Westinghouse Electric Corp Apparatus and method for workpiece thickness control
US3101016A (en) * 1959-02-26 1963-08-20 British Iron Steel Research Rolling mills
US3103138A (en) * 1960-06-09 1963-09-10 Westinghouse Electric Corp Foil thickness control apparatus
US3151507A (en) * 1961-05-23 1964-10-06 Datex Corp Speed control system
US3177346A (en) * 1959-11-06 1965-04-06 United Steel Companies Ltd Apparatus for use in controlling a rolling mill
US3334502A (en) * 1962-12-24 1967-08-08 Siemens Ag Strip thickness control apparatus for a rolling mill
US3365920A (en) * 1963-09-02 1968-01-30 Hitachi Ltd Control apparatus for tandem rolling mills
US3491824A (en) * 1966-12-06 1970-01-27 Boehler & Co Ag Geb Process of producing rolled stock from a high-melting metal by continuous casting and rolling operations
CN108043881A (zh) * 2017-12-12 2018-05-18 中冶南方工程技术有限公司 一种单机架冷轧机的厚度与张力的解耦控制方法及系统

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1293712B (de) * 1959-02-05 1969-04-30 Rega Gmbh & Co Kg Dickenregeleinrichtung fuer Walzmaschinen
BE624109A (de) * 1961-10-27
US3169424A (en) * 1962-01-30 1965-02-16 Gen Electric Automatic control system for rolling mills and adjustable dies
CH207631A (de) * 1964-12-28 1939-11-15 Caironi Walter Leichtmetall-Radfelge und Verfahren zur Herstellung derselben.
GB1163274A (en) * 1965-12-28 1969-09-04 British Iron Steel Research Improvements in and relating to Rolling Mills
US3444713A (en) * 1966-07-15 1969-05-20 Gen Dynamics Corp Volume flow automatic gage control
FR1513585A (fr) * 1967-01-06 1968-02-16 Spidem Ste Nle Procédé et dispositif de contrôle ou de mesure de l'épaisseur d'une bande venants'enrouler en mouvement continu sur un tambour
US3564882A (en) * 1968-04-22 1971-02-23 Allegheny Ludlum Steel Rolling mill control system
DE2947233C2 (de) * 1979-11-23 1992-03-12 Kocks Technik Gmbh & Co, 4010 Hilden Vorrichtung zur Steuerung der Wanddicke von Rohren
GB8432438D0 (en) * 1984-12-21 1985-02-06 De La Rue Syst Sensing sheets

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1977619A (en) * 1931-04-15 1934-10-23 Aluminum Co Of America Automatic gauge control system for rolling mills
US2051018A (en) * 1934-03-28 1936-08-11 Gen Electric Speed ratio indicating device
US2137611A (en) * 1933-10-20 1938-11-22 Aluminum Co Of America Gauge control apparatus
GB533162A (en) * 1938-08-11 1941-02-07 British Thomson Houston Co Ltd Improvements in and relating to the automatic control of the thickness of material issuing from rolling mills and the like
US2264095A (en) * 1936-12-18 1941-11-25 Gen Electric Control system
US2275509A (en) * 1938-08-22 1942-03-10 Aetna Standard Eng Co Control for rolling mills
US2281083A (en) * 1938-04-28 1942-04-28 Westinghouse Electric & Mfg Co Control system for rolling mills
US2297812A (en) * 1939-06-30 1942-10-06 Westinghouse Electric & Mfg Co Draft control system
US2303596A (en) * 1941-04-18 1942-12-01 Sperry Prod Inc Sheet thickness gauge for continuous rolling mills
US2332272A (en) * 1941-04-18 1943-10-19 Sperry Prod Inc Sheet thickness gauge for continuous rolling mills

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE740975C (de) * 1939-06-30 1943-11-01 Siemens Ag Einrichtung zum Regeln der Querschnittsabnahme des Walzgutes bei Bandwalzwerken
DE815063C (de) * 1949-01-01 1951-10-22 Brown Einrichtung zur UEberwachung von elektromotorisch angetriebenen Wickelvorrichtungen
NL78713C (de) * 1949-10-11

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1977619A (en) * 1931-04-15 1934-10-23 Aluminum Co Of America Automatic gauge control system for rolling mills
US2137611A (en) * 1933-10-20 1938-11-22 Aluminum Co Of America Gauge control apparatus
US2051018A (en) * 1934-03-28 1936-08-11 Gen Electric Speed ratio indicating device
US2264095A (en) * 1936-12-18 1941-11-25 Gen Electric Control system
US2281083A (en) * 1938-04-28 1942-04-28 Westinghouse Electric & Mfg Co Control system for rolling mills
GB533162A (en) * 1938-08-11 1941-02-07 British Thomson Houston Co Ltd Improvements in and relating to the automatic control of the thickness of material issuing from rolling mills and the like
US2275509A (en) * 1938-08-22 1942-03-10 Aetna Standard Eng Co Control for rolling mills
US2297812A (en) * 1939-06-30 1942-10-06 Westinghouse Electric & Mfg Co Draft control system
US2303596A (en) * 1941-04-18 1942-12-01 Sperry Prod Inc Sheet thickness gauge for continuous rolling mills
US2332272A (en) * 1941-04-18 1943-10-19 Sperry Prod Inc Sheet thickness gauge for continuous rolling mills

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3000243A (en) * 1955-09-09 1961-09-19 Westinghouse Electric Corp Sheet length controller
US3045517A (en) * 1957-05-29 1962-07-24 Westinghouse Electric Corp Strip thickness control apparatus
US3089363A (en) * 1957-05-29 1963-05-14 Westinghouse Electric Corp Strip thickness control apparatus
US3030836A (en) * 1957-07-08 1962-04-24 Jones & Laughlin Steel Corp Continuous strip gauge control means
US3096670A (en) * 1957-07-16 1963-07-09 Westinghouse Electric Corp Apparatus and method for workpiece thickness control
US3049950A (en) * 1957-09-17 1962-08-21 British Aluminium Co Ltd Manufacture of metal sheet or strip
US3078747A (en) * 1957-09-17 1963-02-26 British Aluminium Co Ltd Manufacture of metal sheet or strip
US3062078A (en) * 1957-10-16 1962-11-06 Westinghouse Canada Ltd Material thickness control apparatus
US3024680A (en) * 1958-06-02 1962-03-13 Ind Nuclconics Corp Process measurement and control
US3015974A (en) * 1958-09-18 1962-01-09 Gen Electric Automatic control system for rolling mills and adjustable dies
US3078746A (en) * 1958-11-21 1963-02-26 George P Dirth Gage control system for strip mill
US3036481A (en) * 1958-11-21 1962-05-29 George P Dirth Gage control system for strip mill
US3101016A (en) * 1959-02-26 1963-08-20 British Iron Steel Research Rolling mills
US3054311A (en) * 1959-04-17 1962-09-18 Allegheny Ludlum Steel Automatic control system for rolling mills and adjustable dies with automatic error detection
US3054310A (en) * 1959-05-21 1962-09-18 Industrial Nucleonics Corp Control system
US3177346A (en) * 1959-11-06 1965-04-06 United Steel Companies Ltd Apparatus for use in controlling a rolling mill
US3103138A (en) * 1960-06-09 1963-09-10 Westinghouse Electric Corp Foil thickness control apparatus
US3151507A (en) * 1961-05-23 1964-10-06 Datex Corp Speed control system
US3334502A (en) * 1962-12-24 1967-08-08 Siemens Ag Strip thickness control apparatus for a rolling mill
US3365920A (en) * 1963-09-02 1968-01-30 Hitachi Ltd Control apparatus for tandem rolling mills
US3491824A (en) * 1966-12-06 1970-01-27 Boehler & Co Ag Geb Process of producing rolled stock from a high-melting metal by continuous casting and rolling operations
CN108043881A (zh) * 2017-12-12 2018-05-18 中冶南方工程技术有限公司 一种单机架冷轧机的厚度与张力的解耦控制方法及系统
CN108043881B (zh) * 2017-12-12 2019-03-29 中冶南方工程技术有限公司 一种单机架冷轧机的厚度与张力的解耦控制方法及系统

Also Published As

Publication number Publication date
FR1142917A (fr) 1957-09-24
GB780486A (en) 1957-08-07
USRE25075E (en) 1961-10-31
BE535052A (de)
DE1118866B (de) 1961-12-07

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