US3902345A - Control device for rolling mill - Google Patents

Control device for rolling mill Download PDF

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Publication number
US3902345A
US3902345A US376454A US37645473A US3902345A US 3902345 A US3902345 A US 3902345A US 376454 A US376454 A US 376454A US 37645473 A US37645473 A US 37645473A US 3902345 A US3902345 A US 3902345A
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United States
Prior art keywords
roll
axial
optimum
movement
mill
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Expired - Lifetime
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US376454A
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English (en)
Inventor
Shigeru Shida
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Hitachi Ltd
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Hitachi Ltd
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    • 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
    • B21B37/28—Control of flatness or profile during rolling of strip, sheets or plates
    • B21B37/42—Control of flatness or profile during rolling of strip, sheets or plates using a combination of roll bending and axial shifting of the rolls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B13/00—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
    • B21B13/02—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories with axes of rolls arranged horizontally
    • B21B2013/028—Sixto, six-high stands
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2271/00—Mill stand parameters
    • B21B2271/06—Mill spring

Definitions

  • This invention relates to a control device for a rolling mill or more in particular to a shape control device and a gage control device suitable for use with the shape control device for a rolling mill so constructed that the shape of a material, as rolled, is controlled by the adjustment of the roll displacement in the axial direction in combination with the roll bending action.
  • This invention is intended to obviate the above mentioned problems and an object thereof is to provide a control device for the rolling mill in which both the roll bending force and the roll axial movement are exactly controlled thereby to achieve automatic and accurate shape control of the rolled material.
  • Another object of the invention is to provide a control device for the rolling mill which exactly compensates for the changes in the mill constant caused by the axial roll movement thereby to accomplish accurate automatic gage control operation.
  • control device for the rolling mill is characterized by the combined use of adjustment of axial roll movement and roll bending ac tion for shape control of the material, so that the optimum axial roll movement and optimum roll bending force are calculated upon detection of the rolling load and the width of the material, and a device for adjusting axial roll movement and a roll bending device are operated on the basis of the results of the calculation.
  • Another feature of the invention resides in the fact that there is additionally provided an automatic gage control device of the BISRA type in Whcih the relationship between the axial roll movement and mill constant is stored in advance, whereby the thickness of the material is controlled on the basis of a mill constant derived from an actual value of the axial roll movement.
  • FIG. 1 is a diagram showing the essential parts of an example of the rolling mill to which the present invention is applicable.
  • FIG. 2 is a graph showing the relationship between the axial movement of the middle rolls and the shape of the rolled material.
  • FIG. 3 is a diagram showing the relationship between the rolling load and optimum bending force.
  • FIG. 4 is a diagram showing essential parts of an embodiment of the invention as it is applied to the rolling mill illustrated in FIG. 1.
  • FIG. 5 is a diagram showing another embodiment of the invention.
  • FIG. 6 is a graph showing mill stiffness as related to the axial movement of the middle rolls.
  • FIG. 7 is a diagram showing essential parts of an example of the rolling mill to which only the automatic gage control is applied among the devices according to the invention.
  • FIG. 8 is a graph showing the relationship between the mill constant and the axial movement of the middle rolls.
  • FIG. 9 is a diagram showing the essential parts of an example of the rolling mill to which an automatic gage control different from that shown in FIG. 7 is applied.
  • This rolling mill is of such a type that the middle rolls 3, 3' each disposed between one of the work rolls 2, 2' and a corresponding one of the buck-up rolls 4, 4 are moved in the axial direction in accordance with the width of the plate material 1 by means of axial roll moving devices 6,
  • the shape control of the material in rolling is effected by the adjustment of axial movement of the middle rolls in cooperation with the roll bending action of the work roll bending devices 5, 5' so that the work rolls may provide a smaller gap therebetween at the center portion than at both end portions.
  • the rolling mill according to the invention is characterized in that the distribution of rolling pressure imparted from the back up rolls to the work rolls is changed by axial movement of the middle rolls 3, 3 thereby to prevent the work rolls from being bent by the rolling pressure in a direction opposite to the direction of bending by the work roll bending dcvice.
  • the freedom of the end portions of the work rolls- is increased roll to increase rol bending function by the roll bending device, which combines with the prevention of the opposite bending of the work rolls to achieve more efficient shape control.
  • the arrangement of rolls is not limited to that shown in the drawing, but in another example the work rolls may be directly bucked up by the buck-up rolls, so that the shape of the material as rolled is controlled by a combination of the axial movementof the buck-up rolls and the work roll bending action. In still another example. the work rolls themselves may be moved in the axial direction to achieve the same effect.
  • the graph of FIG. 2 showing the relationship between the axial movement of the middle rolls and the shape of the material is based on the actual measurements in rolling under the conditions of the work rolls 110 mm in diameter, buck up rolls 200 mm in diameter, middle rolls l'mr'n in diameter, each 300 mm long, plate material 150 mm wide, rate of reduction of 7t and one ton of roll bending force.
  • FIG. 4 A control device according to an embodiment of the invention which operates on this principle as it is applied to the rolling mill of FIG. 1 is shown in FIG. 4.
  • Plate width B and rollingload P are detected respectively by plate width detector means 7 and load detector means 8, and on the basis of the detected values B and P the optimum axial roll movementl. is calculated by a calculator or an operational unit 9, the output of which is applied to the comparator means 10.
  • the optimum roll bending force F is calculated and applied to the comparator means 11 in like manner.
  • the actual axial roll movement L is calculated by an operational unit 13 on the basis of the measurements obtained by the axial movement detector means 12 and 12 and applied to the comparator 10, while the actual roll bending force F is detected by the roll bending force detector means 14 and applied to the comparator 11.
  • the comparator 10 compares the input L with L and applies an output to the-axial roll movement control means 15, which uses the applied signal to actuate the axial roll moving devices 6, 6.
  • the comparator ll compares the input F with F and applies its output signal to the roll bending force control means 16, which utilizes this applied signal to actuate the roll bending device 5.
  • the roll bending force and axial roll movement are both exactly controlled whereby accurate shape control is performed, thereby greatly contributing to an improved efficiency of rolling operation and improved quality of rolled products.
  • rolling load P in equation (3) above is obtained from the well known equation below.
  • reference numeral 20 shows a calculator or operational unit which calculates the optimum axial roll movement L optimum roll bending force F and optimum plate shape 5,, on the basis of the grade of steel to be rolled, plate width, plate thickness, rate of reduction, tension applied to the steel plate and roll diameter and the like input data and applies them, together with plate width B to adders 21, 22, 23 and 24.
  • the plate shape is represented by a valve B as abovementioned, or may be represented by a difference between the maximum thickness and the minimum one measured along a narrow portion of the rolled portion extending across its width or a ratio of those values.
  • the optimum plate shape S is determined based on experimental data for such values.
  • the adder 21 concerned with the roll bending force receives through a switch 27 optimum value F theactual roll bending force F from the roll bending force detector means 14 and an output AF as described hereinafter, from the operational unit 26 through a switch 27.
  • the switch 27 is so operated that it opens in preset state and closes during a rolling oper ation.
  • the adder 21 calculates and produces as an output the error signal E whichis This error signal is applied to the roll bending force control means 16 whereby it performs a control operation.
  • the operational unit 13 determines the actual axial roll movement L in response to an output signal from the axial movement detector means 12, 12' and applies a signal representing value L to the calculator 22.
  • the calculator which is concerned with axial roll movement receives signals L and L and an output signal AL as described hereinafter, from the operational unit 28 through the switch 29.
  • the switch is such that it opens in a preset state and closes during a rolling operation.
  • the calculator 22 calculates and produces the error signal E below.
  • This error signal is applied to the axial roll movement control means 15 thereby to control the axial roll moving devices 6, 6'.
  • both AP and AL in equations (5) and (6) are zero, so that the control means 15 and 16 operate till the values F and L calculated by the calculator 20 coincide with values F and L respectively, and stop the operations when the coincidence is achieved.
  • both the switches 27 and 29 are closed, so that shape signal S produced from the shape detector means and width signal B produced from the plate width detector means 7 are applied to the adders 23 and 24 respectively.
  • the adder 23 compares the signal S with signal S and applies an error signal AS to the operational unit 26.
  • the operational unit 26 converts signal AS into a correction value AF or roll bending force and applies it to the calculator 21.
  • the roll bending force F is corrected by AF according to equation (5). This means that the optimum roll bending force F calculated by using various parameters of rolling works as abovcmentioned is necessary to be replaced by a corrected value F AF due to various factors unforeseen.
  • the calculator 24 compares signal B with signal 8,, and produces an error signal A8,, which is applied to the operational unit 28, whereupon the operational unit 28 converts signal AB into corrected value AL of axial roll movement and produces its output to be applied to the calculator 22.
  • the axial roll movement L is corrected by AL in accordance with equation (6).
  • the component elements surrounded by a dashed line may be replaced by a single controlling calculator.
  • both the roll bending force and axial roll movement are capable of being preset simultaneously prior to the rolling operation, whereas they can be corrected during the rolling operation, thereby making possible accurate, automatic shape control by means of appropriate compensation of both the values.
  • Mill constant K is variable in a rolling mill according to the present invention which involves axial roll movement. Accordingly, in addition to rolling load P, mill constant K is required to be detected and substituted into equations (7) and (8) above thereby to control roll gap index D. According to the present invention. for the purpose of detecting the mill constant K, the axial roll movement L is made quantitatively related to mill constant K and thus the roll gap index D is controlled according to the axial roll movement L.
  • the relationship between rolling load and relative value of mill spring as the axial movement of the middle rolls is changed in the rolling mill of FIG. I is illustrated in FIG. 6.
  • the shown graph involves axial roll movement L of 2000 mm for curve A, 1515 mm for curve B, 1020 mm for curve C and 500 mm for curve D in a rolling mill comprising work rolls 500 mm in diameter, buck up rolls 1500 mm in diameter, and midle rolls 650 mm in diameter, each 2000 mm long.
  • the axial movement of the middle rolls has a close relation to the relative value of mill spring, so that it is possible to determine the relative value of mill spring on the basis of such a relation measured actually, if the axial movement of the middle rolls is known in advance. Further, by substituting the relative value of the mill spring into equations (7) and (8), roll gap index D is determined.
  • FIG. 7 An example of the application of the automatic gage control according to the invention to the rolling mill of FIG. 1 is shown in FIG. 7.
  • axial roll movement L is calculated by the operational unit 13 on the basis of measurements obtained from the axial movement detector means l2, l2, and the calculated results are applied to the calculator 40.
  • the calculator 40 which stores a mill stiffness curve actually measured in advance about the rolling mill involved, calculates relative value W of mill spring corresponding to input L thereto, further calculates roll gap index D from input values W and P on the basis of equations (7) and (8), and then applies its output signal to the reduction means 41, whereupon the reduction means maintains a predetermined thickness of the plate material in response to input signal D.
  • Mill constant K included in equation (8) represents the gradient of the mill stiffness curve of FIG. 6 and when variations are taken in equations (7) and (8).
  • FIG. 9 The control device embodying the present invention which is applied to the rolling mill as shown in FIG. I on the basis of the above-mentioned relationship is illustrated in FIG. 9.
  • axial roll movement L is calculated by the operational unit 13 from the measurements obtained in the axial movement detector means 12, 12 and the output of the operational unit 13 is applied to the function generator means 50.
  • the function generator means 50 applies mill constant K to the operational unit 51 on the actually measured relations between the axial roll movement L and mill constant K.
  • rolling load P is continuously detected by the load detector means 8, so that variation AP is applied to the operational unit 51.
  • the operational unit 51 calculating vari ation AD of the roll gap index from an input value K and AP on the basis of equation (9), applies its output to the reduction means 41.
  • the reduction means 41 is actuated in response to input signal AD thereby to maintain a predetermined thickness of the plate material.
  • the improved control device comprising means for detecting a rolling load and width of the plate material, means for calculating optimum axial roll movement and optimum roll bending force, an axial roll moving device and a roll bending device operated on the basis of an output from said calculating means.
  • a control device comprising means for detecting the rolling load and the width of the plate material, means for determining optimum axial roll movement and optimum roll bending force in response to an input thereto from said detector means, means for detecting an actual axial roll movement and roll bending force, means for comparing the actual values means of axial roll movement and roll bending force with the optimum values of axial roll movement roll bending force and means for controlling an axial roll moving device and a roll bending device in response to the output signal from said comparator means.
  • the improved control device so constructed that the values of optimum axial roll movement, and optimum roll bending force and a value representing the optimum shape of the steel plate are determined on the basis of data including the grade of steel, standard width of the steel plate, thickness of the plate, rate of reduction, tension applied thereto and roll diameters, the width and a value representing the shape of the steel plate are detected, and the detected values are compared with said standard width and the value representing said optimum shape thereby to correct said optimum values of the axial roll movement and roll bending force.
  • a control device comprising means for determining the values of the optimum axial roll movement, and optimum roll bending force and a value representing the optimum shape of the plate upon application thereto data required for shape control including the grade of steel, standard width of the plate material, thickness of the plate material, rate of reduction, tensile strength and roll diameters, said means producing said determined values and a signal representing the width of the plate material, means for controlling the axial roll moving device and the roll bending device in accordance with the optimum values of the axial roll movement and the roll bending force, means for detecting the width and a value representing the shape of the plate, means for comparing said detected values with the standard width and the value representing the optimum shape of the plate material and determining the correction values of axial roll movement and roll bending force and means for applying said correction values to means for controlling the axial roll moving device and the roll bending device.
  • a control device comprising means for detecting the axial roll movement, means for comparing said detected value with the mill stiffness characteristic and converting said detected value into said mill stiffness characteristic, said mill stiffness characteristic being stored in said comparator means in advance, means for calculating a roll gap required for a material to be rolled into thickness in accordance with a rolling load separately detected, and means for reducing the rolls in response to a signal from said calculator.
  • a control device comprising means for detecting an axial roll movement, function generator means for comparing said detected value with a mill constant and converting said detected value into said mill constant, said mill constant being memorized in said function generator means in advance, and means for calculating a roll gap variation required for maintaining a predetermined thickness of the plate material in accordance with the output from said function generator means and a rolling load separately detected, said calculating means applying its output to roll reducing means.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Metal Rolling (AREA)
US376454A 1972-07-07 1973-07-05 Control device for rolling mill Expired - Lifetime US3902345A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP47067501A JPS527425B2 (enrdf_load_stackoverflow) 1972-07-07 1972-07-07
JP47067494A JPS525304B2 (enrdf_load_stackoverflow) 1972-07-07 1972-07-07

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US (1) US3902345A (enrdf_load_stackoverflow)
JP (2) JPS527425B2 (enrdf_load_stackoverflow)
DE (1) DE2334492C2 (enrdf_load_stackoverflow)

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2828151A1 (de) * 1978-06-21 1980-01-10 Nippon Steel Corp Vorrichtung zur steuerung der lage einer walze in ihrer axialen richtung beim walzen eines materials
US4194382A (en) * 1976-11-26 1980-03-25 Hitachi, Ltd. Rolling mill
DE2901057A1 (de) * 1978-12-28 1980-07-17 Vnii Pk I Metall Maschino Walzensatz eines walzgeruestes
EP0026903A1 (en) * 1979-10-04 1981-04-15 Hitachi, Ltd. Rolling mill
DE3102634A1 (de) * 1981-01-27 1982-08-12 Nippon Steel Corp., Tokyo Verfahren und vorrichtung zur axialen einstellung einer auf einer walze lose gelagerten huelse in einem walzgeruest
US4400957A (en) * 1980-04-25 1983-08-30 Asea Aktiebolag Strip or sheet mill with improved regulating device and method
EP0088443A1 (en) * 1982-03-10 1983-09-14 Hitachi, Ltd. Rolling mill
US4483165A (en) * 1982-02-19 1984-11-20 Hitachi, Ltd. Gauge control method and apparatus for multi-roll rolling mill
DE3331055A1 (de) * 1983-08-29 1985-03-14 SMS Schloemann-Siemag AG, 4000 Düsseldorf Walzgeruest mit axial verschieblichen arbeitswalzen
US4627260A (en) * 1983-07-18 1986-12-09 Sms Sloemann Siegmag Ag Rolling stand with axially shiftable rolls
US4773246A (en) * 1986-02-14 1988-09-27 Clecim Process for adjusting the profile of rolls movable in a rolling mill and improved rolling mill for carrying out the process
US4823585A (en) * 1984-02-29 1989-04-25 Kawasaki Steel Corporation Hot rolling method
US4881396A (en) * 1987-04-09 1989-11-21 Sms Schloemann-Siemag Aktiengesellschaft Rolling mill stand with axially slidable rolls
US4898014A (en) * 1988-12-23 1990-02-06 United Engineering, Inc. Roll shifting system for rolling mills
US6070443A (en) * 1995-08-30 2000-06-06 Nsk Ltd. Apparatus for forming an annular member
US20020162378A1 (en) * 2001-02-05 2002-11-07 Hidetoshi Nishi Rolling method for strip rolling mill and strip rolling equipment
US6769279B1 (en) 2002-10-16 2004-08-03 Machine Concepts, Inc. Multiroll precision leveler with automatic shape control
CN100335191C (zh) * 2004-07-07 2007-09-05 株式会社日立制作所 轧制控制方法及轧制控制装置
CN102107217B (zh) * 2009-12-25 2013-01-09 鞍钢股份有限公司 一种消除轧机工作辊标定印的方法
US9459086B2 (en) 2014-02-17 2016-10-04 Machine Concepts, Inc. Shape sensor devices, shape error detection systems, and related shape sensing methods
US10363590B2 (en) 2015-03-19 2019-07-30 Machine Concepts, Inc. Shape correction leveler drive systems
US10710135B2 (en) 2016-12-21 2020-07-14 Machine Concepts Inc. Dual-stage multi-roll leveler and work roll assembly
US11833562B2 (en) 2016-12-21 2023-12-05 Machine Concepts, Inc. Dual-stage multi-roll leveler and metal strip material flattening method

Families Citing this family (9)

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Publication number Priority date Publication date Assignee Title
JPS5338945B2 (enrdf_load_stackoverflow) * 1973-11-05 1978-10-18
US3958448A (en) * 1974-10-10 1976-05-25 Aluminum Company Of America Test apparatus for pressurized container and method
JPS5581009A (en) * 1978-12-14 1980-06-18 Nippon Steel Corp Skin-pass rolling shape control method of cold rolled hoop after continuous annealing and equipment thereof
JPS591408U (ja) * 1982-06-25 1984-01-07 石川島播磨重工業株式会社 圧延制御装置
DE3245090A1 (de) * 1982-12-06 1984-06-07 SMS Schloemann-Siemag AG, 4000 Düsseldorf Verfahren und einrichtung zum walzen von metallbaendern
DE3245031A1 (de) * 1982-12-06 1984-06-07 SMS Schloemann-Siemag AG, 4000 Düsseldorf Walzgeruest
JPS60202340A (ja) * 1984-03-27 1985-10-12 Matsushita Refrig Co 包装体の減圧度検査装置
DE3638331C2 (de) * 1986-11-10 1995-07-13 Schloemann Siemag Ag Walzgerüst zum Walzen von Flachmaterial mit einem Paar von axial verschiebbaren Arbeitswalzen
CN107755432B (zh) * 2017-09-08 2019-02-01 张家港浦项不锈钢有限公司 一种炉卷轧机串辊方法

Citations (2)

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US2776586A (en) * 1948-06-10 1957-01-08 Armzen Company Construction and control of cold rolling mills
US3076360A (en) * 1958-08-22 1963-02-05 Sendzimir Tadeusz Clam shell cold rolling mill

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US2566679A (en) * 1943-02-25 1951-09-04 Armzen Company Rolling mill and lubrication method and means therefor
US3213655A (en) * 1962-12-03 1965-10-26 Westinghouse Electric Corp Workpiece shape control apparatus
GB1199203A (en) * 1966-11-30 1970-07-15 Nippon Kokan Kk Apparatus for Controlling the Shape of a Workpiece During Rolling

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2776586A (en) * 1948-06-10 1957-01-08 Armzen Company Construction and control of cold rolling mills
US3076360A (en) * 1958-08-22 1963-02-05 Sendzimir Tadeusz Clam shell cold rolling mill

Cited By (33)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4194382A (en) * 1976-11-26 1980-03-25 Hitachi, Ltd. Rolling mill
DE2828151A1 (de) * 1978-06-21 1980-01-10 Nippon Steel Corp Vorrichtung zur steuerung der lage einer walze in ihrer axialen richtung beim walzen eines materials
DE2901057A1 (de) * 1978-12-28 1980-07-17 Vnii Pk I Metall Maschino Walzensatz eines walzgeruestes
EP0094104A3 (en) * 1979-10-04 1984-07-25 Hitachi, Ltd. Rolling mill and method for rolling a sheet material
EP0026903A1 (en) * 1979-10-04 1981-04-15 Hitachi, Ltd. Rolling mill
US4400957A (en) * 1980-04-25 1983-08-30 Asea Aktiebolag Strip or sheet mill with improved regulating device and method
DE3102634A1 (de) * 1981-01-27 1982-08-12 Nippon Steel Corp., Tokyo Verfahren und vorrichtung zur axialen einstellung einer auf einer walze lose gelagerten huelse in einem walzgeruest
US4483165A (en) * 1982-02-19 1984-11-20 Hitachi, Ltd. Gauge control method and apparatus for multi-roll rolling mill
EP0088443A1 (en) * 1982-03-10 1983-09-14 Hitachi, Ltd. Rolling mill
US4537057A (en) * 1982-03-10 1985-08-27 Hitachi, Ltd. Method for RD rolling sheet metal
US4627260A (en) * 1983-07-18 1986-12-09 Sms Sloemann Siegmag Ag Rolling stand with axially shiftable rolls
DE3331055A1 (de) * 1983-08-29 1985-03-14 SMS Schloemann-Siemag AG, 4000 Düsseldorf Walzgeruest mit axial verschieblichen arbeitswalzen
US4823585A (en) * 1984-02-29 1989-04-25 Kawasaki Steel Corporation Hot rolling method
US4773246A (en) * 1986-02-14 1988-09-27 Clecim Process for adjusting the profile of rolls movable in a rolling mill and improved rolling mill for carrying out the process
US4881396A (en) * 1987-04-09 1989-11-21 Sms Schloemann-Siemag Aktiengesellschaft Rolling mill stand with axially slidable rolls
US4898014A (en) * 1988-12-23 1990-02-06 United Engineering, Inc. Roll shifting system for rolling mills
US6070443A (en) * 1995-08-30 2000-06-06 Nsk Ltd. Apparatus for forming an annular member
US6332260B1 (en) 1995-08-30 2001-12-25 Nsk Ltd. Apparatus and method of forming an annular member
US6868707B2 (en) * 2001-02-05 2005-03-22 Hitachi, Ltd. Rolling method for strip rolling mill and strip rolling equipment
US20020162378A1 (en) * 2001-02-05 2002-11-07 Hidetoshi Nishi Rolling method for strip rolling mill and strip rolling equipment
US7004002B2 (en) * 2001-02-05 2006-02-28 Hitachi, Ltd. Rolling method for strip rolling mill and strip rolling equipment
US20040206147A1 (en) * 2001-02-05 2004-10-21 Hitachi, Ltd. Rolling method for strip rolling mill and strip rolling equipment
US6920774B1 (en) 2002-10-16 2005-07-26 Machine Concepts, Inc. Drive system for multi-roll leveler
US6857301B1 (en) 2002-10-16 2005-02-22 Machine Concepts, Inc. Displacement-type shape sensor for multi-roll leveler
US6848289B1 (en) 2002-10-16 2005-02-01 Machine Concepts, Inc. Integrated actuator assembly for pivot style multi-roll leveler
US6792783B1 (en) 2002-10-16 2004-09-21 Machine Concepts, Inc. Quick change cassette system for multi-roll leveler
US6769279B1 (en) 2002-10-16 2004-08-03 Machine Concepts, Inc. Multiroll precision leveler with automatic shape control
CN100335191C (zh) * 2004-07-07 2007-09-05 株式会社日立制作所 轧制控制方法及轧制控制装置
CN102107217B (zh) * 2009-12-25 2013-01-09 鞍钢股份有限公司 一种消除轧机工作辊标定印的方法
US9459086B2 (en) 2014-02-17 2016-10-04 Machine Concepts, Inc. Shape sensor devices, shape error detection systems, and related shape sensing methods
US10363590B2 (en) 2015-03-19 2019-07-30 Machine Concepts, Inc. Shape correction leveler drive systems
US10710135B2 (en) 2016-12-21 2020-07-14 Machine Concepts Inc. Dual-stage multi-roll leveler and work roll assembly
US11833562B2 (en) 2016-12-21 2023-12-05 Machine Concepts, Inc. Dual-stage multi-roll leveler and metal strip material flattening method

Also Published As

Publication number Publication date
DE2334492A1 (de) 1974-01-17
DE2334492C2 (de) 1982-09-02
JPS4927467A (enrdf_load_stackoverflow) 1974-03-11
JPS527425B2 (enrdf_load_stackoverflow) 1977-03-02
JPS525304B2 (enrdf_load_stackoverflow) 1977-02-12
JPS4927468A (enrdf_load_stackoverflow) 1974-03-11

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