US2680978A - Production of sheet and strip - Google Patents

Production of sheet and strip Download PDF

Info

Publication number
US2680978A
US2680978A US234982A US23498251A US2680978A US 2680978 A US2680978 A US 2680978A US 234982 A US234982 A US 234982A US 23498251 A US23498251 A US 23498251A US 2680978 A US2680978 A US 2680978A
Authority
US
United States
Prior art keywords
thickness
signal
strip
roll
sheet
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
Application number
US234982A
Other languages
English (en)
Inventor
Hessenberg Wilfrid C Frederick
Sims Raymond Bernard
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
Original Assignee
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 US2680978A publication Critical patent/US2680978A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/02—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of sheets
    • 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
    • B21B37/58—Roll-force control; Roll-gap control
    • B21B37/64—Mill spring or roll spring compensation systems, e.g. control of prestressed mill stands

Definitions

  • V 2',sso,97s v PRODUCTION OF SHEET AND STRIP Wilfrid Cecil Frederick Hessenberg, and Raymond Bernard Sims, Sh land; assi'gnors to The British. Iron Research. Association, London,
  • the present invention relatesto theproduction of sheet or strip by'rolling or by drawing through dies of the kind. having opposing die surfaces Whose separation is adjustable.
  • the material entering between the rolls orv opposing, die surfaces may vary in thickness and other properties along its length and across its width asthe result oi'previous.v treatment.
  • these thickness. variations are not entirely removed, and in fact other variations may beimposed' by'changesin the conditions of rolling or drawing.
  • One object of the present invention is' to provide a new or improved method of controlling the thickness of'the sheet or'strip produced.
  • the method of controlling the thickness of the strip in th present invention is dependent upona relationship'between the separating force between the rolls engenderedby'the-strip passing througlr them, the roll setting, which is defined as theminimum distancebetween the rolls when no separating force is acting, and of the outgo ing or issuing thickness.
  • This relationship states that the separating force is proportional to the difference between: the outgoingstripthickness and the roll setting:
  • the factor of 'proportion ality is the elastic constant of the-mill commonly known as the mill spring;
  • A- corollary of this relationship is thatiianyincrease separating- 2 force is accompaniedby a decrease in roll" setting. equal to the change in separating force divided. by the mill spring, the outgoing strip thickness will remain constant; Similarly; to maintain the.
  • load responsive elements which will respond to vari'ationsin thev separating force are incorporated in the mil-l and linked by mechanical, electrical and /or' hydrau-licr means with the roll adjusting mechanisms in such: a way that the desired relationship between the: changes in separating force and rollsetting is continuously maintained;
  • Figure 3- isa side view' of" a rolldisplacement..- meter which is responsive to the changes the rollsetting,
  • Figure 4 is r aschematic drawing: of the control; arrangement for the apparatus,
  • Figure 5 is a v-iew similarto Figure-q cfia.form of mill using. dies of. the kind referred to'abova; andwhich may beused with the control arrange mentin place of the rolling mill-.
  • Figures 1. and 2 show a rolling millsomewhat; similarc to: conventional mills used: for the rolling of steel? and comprising'work rolls l0 supported-in upper and lower bearing: chock-s: H amp M respectively-*- which' are themselves mountedin: a; mill l st'andi.
  • each meter l8 comprises a sliding rod I9 which passes through the base of a housing and carries a cone 2! at its upper end.
  • the rod I9 is preferably of a metal having a very low coeificient of thermal expansion.
  • Two cantilever arms 22 are attached by one end to the top of the housing with their free ends in contact with the surface of the cone 2
  • the cantilever arms 22 carry electrical resistance strain gauges 23, which are arranged so that any flexing of the arms 22 due to movement of the rod l9 causes a change in the resistance of the gauges 23.
  • the housing 20 is enclosed in a water cooling jacket 24. Thus variations in the distance between the ends of the rolls at which the particular meter is mounted causes a change in the resistance of the gauges 23.
  • each strain gauge I1 is incorporated in a temperature compensated Wheatstone bridge network (see British Patent No..626,206) whilst the strain gauges 23 are incorporated in a similar network 26.
  • Both networks 25 and 26 are supplied with alternating current at a frequency of 500 cycles per second from a source 21.
  • the supply to network 25 is derived via a stabiliser 28 which ensures a substantially constant voltage input to the network 25 whilst the supply to network 26 is supplied via a voltage adjuster 23.
  • the outputs from the bridges 25 and 26 are fed respectively to combined amplifiers and demodulators 30, 31 whose direct current outputs are combined in opposition and applied to a coil 32. It will be understood that the outputs of the networks 26 and 25 will be dependent upon the roll setting and the separating force.
  • are adjusted so that with the desired outgoing thickness of material the outputs from demodulators 33, iii are equal so that the voltage across the coil 32 is zero. Any change in separating force occasioned by a variation in outgoing thickness from the desired value will result in an out-of-balance voltage in the. coil 32.
  • the coil 32 is wound on a core 33 and is movable within a polarising field provided by a permanent magnet 34 against the pressure of return springs 46.
  • the core 33 is attached to the piston 35 of a diflerential fluid valve 36 which controls the supply of low-pressure fluid from an input 31 to one side or the other of a double acting piston 38 in normal manner.
  • the pressure acting on piston 38 is modified by a fluid intensifier 39 which is connected by pipe 40 to the rams Hi. The intensifier acts'so'that the pressure of the piston 38 is amplified when ,1 increasing pressure is required to be applied to the rams 14 for adjusting the roll setting,
  • Figure 5 shows a die stand 4! which can be used in a similar manner to the mill of Figure 1.
  • comprises upper and lower lips 42, 43 respectively, which may for example be of steel or metal carbide.
  • the lower lip 43 is supported in a holder block A l which is fixed relative to the die stand 41.
  • the upper lip 42 is carried by a holder block 45 so as to be movable relative to the other lip 43 for adjustment of the die setting (which corresponds to the roll setting in the case of the rolling mill)'.
  • the die stand includes fluid operated rams Hi operating in cylinders [5, an interposed cylindrical member l6 carrying electrical strain gauges ll and meters l8, all similar to those already described in conjunction with the rolling mill of Figures 1 and 2.
  • the control arrangement is also similar to that described in connection with Figures 1 to 4, and further description is thought to be unnecessary.
  • a thickness reducing member having opposed material engaging surfaces between which a separating force is established by the passage of material therethrough, means for adjusting the 3 separation between said opposed material engaging surfaces in response to a control signal, means for continuously developing a first signal proportional to the separating force, means for continuously developing a second signal proportional to the separation between said opposed surfaces, and means for combining said first and second signals in predetermined proportions to give said control signal.
  • a thickness reducing member having opposed material 7 engaging surfaces between which a separating force is established by the passage of material therethrough, control signal responsive means for adjusting the separation between said opposed material engaging surfaces, means for developing a signal whose amplitude varies in correspondence to changes in said separating force, means for developing a further signal whose amplitude varies in correspondence to changes in said separation, variable gain signal amplifying means for amplifying said first mentioned signal and said further signal in different proportions, signal combining means for combining said first mentioned signal and said further signal after amplification, to give an output signal, and means for applying said output signal to said control signal responsive means.
  • the signal combining means comprises means for balancing the first mentioned signal against the further signal, and the relative gain of the signal amplifying means in respect of the two signals is such that said output signal is zero when the material leaving the apparatus is of predetermined thickness.
  • a thickness reducing member having opposed material engaging surfaces between which a separating force is established by the passage of material therethrough, control signal responsive means for adjusting the separation between said opposed material engaging surfaces, means for developing a signal whose amplitude is proportional to said separating force, means for developing a further signal whose amplitude is proportional to said separation, variable gain amplifying means for amplifying said further signal by a predetermined amount, further variable gain amplifying means for amplifying said first mentioned signal by an amount equal to a predetermined fraction of said predetermined amount, means for developing a control signal which is proportional to the difference between the amplified first mentioned signal and the amplified further signal, said control signal having a predetermined value when the material leaving the apparatus is of predetermined thickness, and means for applying said control signal to said control signal responsive means.
  • a supporting stand in which said thickness reducing member is mounted, and wherein said means for developing said further signal comprises a stress responsive member interposed between one of said opposed material engaging surfaces and said stand, an electrical resistance strain gauge mounted on said stress responsive member and responsive to variations in the stress applied to said stress responsive member, and means for applying an electric potential to said strain gauge, the resultant electric current through said strain gauge providing said further signal.
  • a supporting stand in which said thickness reducing member is mounted, and means for movably supporting at least one of said opposed material engaging surfaces in said stand, the relative position of said last mentioned means in said stand being determined by said control signal responsive means, and wherein said means for developing the first mentioned signal comprises a stress responsive member interposed between said stand and said means for movably supporting the one of said opposed material engaging surfaces, an electrical resistance strain gauge mounted on said stress responsive member and responsive to variations in the stress applied to said stress responsive member, and means for applying an electric potential to said strain gauge, the resultant electric current through said strain gauge providing said first mentioned signal.
  • a rolling mill for reducing the thickness of material passing between a pair of work rolls, a supporting stand, one of said work rolls being fixed relative to said supporting stand and the other being movable relative to said supporting stand, a pair of chocks each housing one end respectively of the movable work roll, two members movably mounted in said stand and each adapted to apply pressure to one of said pair of chocks respectively whereby said movable work roll is urged towards the other work roll, electrically operated means for effecting movement of each of said movable members independently, two stress responsive members each interposed between one of said chocks and one of said movable members, two electrical resistance strain gauges each mounted on one of said stress responsive members, means for applying an electric potential to each of said strain gauges whereby the changes in current through each strain gauge is proportional to the variations in the separating force engendered between the work rolls at the corresponding end thereof by the passage of material through said work rolls, two further stress responsive members each interposed between one of said chocks and said supporting stand, two further electrical resistance strain

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Metal Rolling (AREA)
US234982A 1950-07-05 1951-07-03 Production of sheet and strip Expired - Lifetime US2680978A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB297090X 1950-07-05

Publications (1)

Publication Number Publication Date
US2680978A true US2680978A (en) 1954-06-15

Family

ID=10295851

Family Applications (1)

Application Number Title Priority Date Filing Date
US234982A Expired - Lifetime US2680978A (en) 1950-07-05 1951-07-03 Production of sheet and strip

Country Status (7)

Country Link
US (1) US2680978A (xx)
BE (1) BE504399A (xx)
CH (1) CH297090A (xx)
FR (1) FR1049400A (xx)
GB (1) GB692267A (xx)
LU (1) LU30848A1 (xx)
NL (2) NL83458C (xx)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2897698A (en) * 1955-04-06 1959-08-04 Jones & Laughlin Steel Corp Continuous treatment of metal strip
US2903926A (en) * 1956-01-11 1959-09-15 Baldwin Lima Hamilton Corp Method and apparatus for controlling the contour of rolls in a rolling mill
US3018676A (en) * 1956-12-31 1962-01-30 Natalis H Polakowski Apparatus for rolling strip metal
US3111046A (en) * 1958-02-12 1963-11-19 United States Steel Corp Automatic control system for continuous strip mill
US3124982A (en) * 1959-11-05 1964-03-17 Rolling mill and control system
US3138979A (en) * 1959-07-29 1964-06-30 Sendzimir Inc T Construction and control of planetary mills
US3183693A (en) * 1959-11-30 1965-05-18 Davy & United Eng Co Ltd Control system for temper rolling mills
US3348393A (en) * 1962-08-21 1967-10-24 British Iron Steel Research Rolling
US3841123A (en) * 1972-11-06 1974-10-15 Westinghouse Electric Corp Rolling mill gauge control method and apparatus including entry gauge correction
DE2638096A1 (de) * 1975-08-25 1977-03-17 Hitachi Ltd Verfahren und vorrichtung zur dickensteuerung bei tandemwalzwerken
US20110101139A1 (en) * 2009-11-03 2011-05-05 Inoue Mfg., Inc. Roll mill with automatic control of roll-to-roll distance and inter-roll pressure
CN106694568A (zh) * 2016-12-28 2017-05-24 嘉善中建钢结构安装有限公司 一种轧钢装置

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE960088C (de) * 1952-11-29 1957-03-14 Sandvikens Jernverks Ab Regel- und Messvorrichtung an Walzwerken
FR1215740A (fr) * 1958-10-31 1960-04-20 Siderurgie Fse Inst Rech Perfectionnements aux dispositifs de réglage des laminoirs avec compensation du cédage
US4557126A (en) * 1981-09-30 1985-12-10 Mitsubishi Denki Kabushiki Kaisha Control device for continuous rolling machine
JP4767544B2 (ja) 2005-01-11 2011-09-07 新日本製鐵株式会社 鋼板の冷却制御方法
KR102654757B1 (ko) * 2019-02-07 2024-04-04 현대자동차주식회사 클러치 전류 제어 회로 및 이를 구비한 전자제어밸브

Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1669550A (en) * 1926-04-01 1928-05-15 United Eng Foundry Co Rolling mill and method of rolling
DE644957C (de) * 1934-11-01 1937-05-19 Reineke Regler Vertriebsgesell Walzwerk zum Walzen eines oder mehrerer Walzstaebe oder Walzadern
DE664993C (de) * 1934-05-09 1938-09-10 Eduard Meyer Selbsttaetige hydraulische Nachstellvorrichtung fuer Walzwerke
US2152556A (en) * 1936-03-12 1939-03-28 United Eng Foundry Co Strain gauge
US2180176A (en) * 1936-05-20 1939-11-14 United Eng Foundry Co Strain gauge
US2267380A (en) * 1938-11-16 1941-12-23 Oilgear Co Hold-down system
US2276816A (en) * 1939-05-27 1942-03-17 United Eng Foundry Co Measuring apparatus
US2276843A (en) * 1939-03-31 1942-03-17 Gen Electric Pressure measuring apparatus
US2276817A (en) * 1939-08-24 1942-03-17 United Eng Foundry Co Strain gauge
US2323267A (en) * 1939-09-09 1943-06-29 Sperry Prod Inc Strain gauge for rolling mills and the like
US2332288A (en) * 1942-04-09 1943-10-19 Sperry Prod Inc Compensating potentiometer
US2336371A (en) * 1940-02-24 1943-12-07 Sperry Prod Inc Compensated strain gauge
US2342374A (en) * 1941-03-19 1944-02-22 Sperry Prod Inc Strain gauge for rolling mills and the like
US2345931A (en) * 1941-12-11 1944-04-04 Major E Gates Controlling apparatus

Patent Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1669550A (en) * 1926-04-01 1928-05-15 United Eng Foundry Co Rolling mill and method of rolling
DE664993C (de) * 1934-05-09 1938-09-10 Eduard Meyer Selbsttaetige hydraulische Nachstellvorrichtung fuer Walzwerke
DE644957C (de) * 1934-11-01 1937-05-19 Reineke Regler Vertriebsgesell Walzwerk zum Walzen eines oder mehrerer Walzstaebe oder Walzadern
US2152556A (en) * 1936-03-12 1939-03-28 United Eng Foundry Co Strain gauge
US2180176A (en) * 1936-05-20 1939-11-14 United Eng Foundry Co Strain gauge
US2267380A (en) * 1938-11-16 1941-12-23 Oilgear Co Hold-down system
US2276843A (en) * 1939-03-31 1942-03-17 Gen Electric Pressure measuring apparatus
US2276816A (en) * 1939-05-27 1942-03-17 United Eng Foundry Co Measuring apparatus
US2276817A (en) * 1939-08-24 1942-03-17 United Eng Foundry Co Strain gauge
US2323267A (en) * 1939-09-09 1943-06-29 Sperry Prod Inc Strain gauge for rolling mills and the like
US2336371A (en) * 1940-02-24 1943-12-07 Sperry Prod Inc Compensated strain gauge
US2342374A (en) * 1941-03-19 1944-02-22 Sperry Prod Inc Strain gauge for rolling mills and the like
US2345931A (en) * 1941-12-11 1944-04-04 Major E Gates Controlling apparatus
US2332288A (en) * 1942-04-09 1943-10-19 Sperry Prod Inc Compensating potentiometer

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2897698A (en) * 1955-04-06 1959-08-04 Jones & Laughlin Steel Corp Continuous treatment of metal strip
US2903926A (en) * 1956-01-11 1959-09-15 Baldwin Lima Hamilton Corp Method and apparatus for controlling the contour of rolls in a rolling mill
US3018676A (en) * 1956-12-31 1962-01-30 Natalis H Polakowski Apparatus for rolling strip metal
US3111046A (en) * 1958-02-12 1963-11-19 United States Steel Corp Automatic control system for continuous strip mill
US3138979A (en) * 1959-07-29 1964-06-30 Sendzimir Inc T Construction and control of planetary mills
US3124982A (en) * 1959-11-05 1964-03-17 Rolling mill and control system
US3183693A (en) * 1959-11-30 1965-05-18 Davy & United Eng Co Ltd Control system for temper rolling mills
US3348393A (en) * 1962-08-21 1967-10-24 British Iron Steel Research Rolling
US3841123A (en) * 1972-11-06 1974-10-15 Westinghouse Electric Corp Rolling mill gauge control method and apparatus including entry gauge correction
DE2638096A1 (de) * 1975-08-25 1977-03-17 Hitachi Ltd Verfahren und vorrichtung zur dickensteuerung bei tandemwalzwerken
US20110101139A1 (en) * 2009-11-03 2011-05-05 Inoue Mfg., Inc. Roll mill with automatic control of roll-to-roll distance and inter-roll pressure
US8172166B2 (en) * 2009-11-03 2012-05-08 Inoue Mfg., Inc. Roll mill with automatic control of roll-to-roll distance and inter-roll pressure
CN106694568A (zh) * 2016-12-28 2017-05-24 嘉善中建钢结构安装有限公司 一种轧钢装置

Also Published As

Publication number Publication date
CH297090A (fr) 1954-03-15
BE504399A (xx)
LU30848A1 (xx)
NL3458C (xx)
FR1049400A (fr) 1953-12-29
NL83458C (xx)
GB692267A (en) 1953-06-03

Similar Documents

Publication Publication Date Title
US2680978A (en) Production of sheet and strip
US4485974A (en) Vertical roller mill and method of use thereof
US3901635A (en) Control system for briquetters
US3543549A (en) Rolling mill control for compensating for the eccentricity of the rolls
US4127997A (en) Rolling mill stand
US3039513A (en) Roll position control
GB1288481A (xx)
US3427839A (en) Hydraulic adjusting means for rolling mills
US2903926A (en) Method and apparatus for controlling the contour of rolls in a rolling mill
US4054043A (en) Closed loop integrated gauge and crown control for rolling mills
US3531960A (en) Gauge control method for rolling mills and like apparatus
US3516273A (en) Strip thickness measuring device for use in a rolling mill and like apparatus
US2680976A (en) Production of sheet and strip material
US3714805A (en) Control system and method for concurrent automatic gage and crown control of a rolling mill
GB1157233A (en) Improvements in Multi-Roll Stands
US3877270A (en) Rolling mill including means for compensating for roll bending
US2332288A (en) Compensating potentiometer
US3197986A (en) Control system for rolling mills
GB1270246A (en) Improvements in or relating to rolling
US4611479A (en) Method and apparatus for rolling metal foils
US3394566A (en) Correction of roll positioning in a rolling mill
US3517531A (en) Rolling mill gage control actuator system
US5461895A (en) High capacity hydraulic leveller
US3733875A (en) Work roll sensing and/or balancing arrangements
US3464245A (en) Rolling mill having a controlled hydraulic prestress range and other gap adjusting means for initial operation and for adjustment to said range