US3248916A - Workpiece shape control with a rolling mill - Google Patents

Workpiece shape control with a rolling mill Download PDF

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Publication number
US3248916A
US3248916A US276268A US27626863A US3248916A US 3248916 A US3248916 A US 3248916A US 276268 A US276268 A US 276268A US 27626863 A US27626863 A US 27626863A US 3248916 A US3248916 A US 3248916A
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United States
Prior art keywords
workpiece
roll
mill
thickness
pass
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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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US276268A
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English (en)
Inventor
Alonzo F Kenyon
Jr Andrew W Smith
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CBS Corp
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Westinghouse Electric Corp
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Filing date
Publication date
Priority to BE637693D priority Critical patent/BE637693A/xx
Priority to BE637694D priority patent/BE637694A/xx
Priority to US276268A priority patent/US3248916A/en
Application filed by Westinghouse Electric Corp filed Critical Westinghouse Electric Corp
Priority to US276269A priority patent/US3253438A/en
Priority to GB37076/63A priority patent/GB982231A/en
Priority to FR948282A priority patent/FR1447915A/fr
Priority to FR948281A priority patent/FR1381347A/fr
Priority to GB37077/63A priority patent/GB982232A/en
Application granted granted Critical
Publication of US3248916A publication Critical patent/US3248916A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B21B37/16—Control of thickness, width, diameter or other transverse dimensions
    • 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
    • B21B37/16—Control of thickness, width, diameter or other transverse dimensions
    • B21B37/24—Automatic variation of thickness according to a predetermined programme
    • 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
    • B21B37/38—Control of flatness or profile during rolling of strip, sheets or plates using roll bending

Definitions

  • the present invention relates in general to the passing of a metal workpiece through a metal rolling mill, and more particularly to the operation of a metal rolling mill such that the delivery shape of the workpiece is controlled as desired to cause the workpiece to lie at on the delivery table.
  • the drafting performed on the workpiece during each pass of a given section of a workpiece between a pair of work rolls is constrained by at least four limits.
  • One of these limits is the roll separating force between the work rolls.
  • the roll force mustbe suicient to produce a dat plate with a given amount of roll crown.
  • the roll force on the latter passes must be suiiicient to overcome the crown of the roll.
  • the roll separating force should be controlled throughout a given rolling schedule but particularly on the latter passes.
  • Another limit is the drive motor torque.
  • the workpiece drafting should be made within the limits rating force is maintained at a substantially constant value, the drive motor torque will diminish on the latter passes when the draft or arc of contact relative to the workpiece is less.
  • Another limit is the maximum per unit draft or percentage draft. This limit will prevent edge cracking or other faults as a result of excessive working of the workpiece material.
  • the fourth limit is maximum inches draft and is determined by the maximum practical bite angle which depends on the roll diameter, the roll surface, and the material being rolled.
  • a central rolling mill operation control device such as a digital computer having a memory register, can 'be utilized to produce the desired shape by controlling workpiece drafting with roll force, motor torque, inches draft and percent draft as limits to the operation.
  • the control device is initially given as input information the workpiece thickness, the workpiece width, the workpiece temperature, the material composition and the workpiece length.
  • the control device can be programmed to pass the workpiece a given number of times through a reversing single stand mill or through the known number of stands of a tandem-mill, such that a desired workpiece thickness is scheduled to be delivered from each such pass or stand.
  • the shape or cross-sectional contour of the rolled workpiece is controlled by selecting the roll separating force to overcome the predetermined and ground crown of the rolls plus enough additional force to deliver the workpiece thicker lengthwise along the middle than along the edges as desired.
  • this roll force is calculated to provide a substantially constant ⁇ workpiece percentage crown delivered from the last few passes or stands of the rolling mill.
  • FIGURE l is adiagrammatic showing of one form of control apparatus suitable for operation with a rolling mill in accordance with the teachings of the present invention
  • FIG. 2 is a diagrammatic showing of another form of control apparatus suitable for operation witha rolling mill in accordance with the teachings of the present invention
  • FIG. 3 illustrates the crown in a pair of typical work rolls relative to the accompanying backup rolls
  • FIG. 4 is a curve to illustrate the roll bending in terms of product width and mill stretch
  • FIG. 5 is a showing of work rolls undergoing a considerable roll separating force to illustrate how the width of the workpiece effects the bending of the work roll and the backup rolls;
  • FIG. 6 is a curve to illustrate the relationship between the roll separating force and the workpiece width to produce a workpiece of substantially uniform thickness
  • FIG. 7 is a curve of workpiece thickness plotted in ter-ms of the passes through a rolling mill to illustrate the scheduling of a predetermined number of passes to accomplish a desired workpiece thickness reduction
  • FIG, 8 is a curve of roll separation force in terms of workpiece delivery thickness to illustrate the drafting constraint limits to control the operation of a rolling mill in accordance with the present invention
  • FIG. 9 illustrates the effective constraint limits on l the drafting operation of a rolling mill.
  • FIG. l0 illustrates the provision of the necessary workpiece thickness sensing devices to monitor the desired workpiece shape delivered from a rolling mill.
  • FIGURE 1 there is shown a rolling mill 10 including work rolls 12 and 14 operative with backup ro1ls16 and 18.
  • a mill motor 2t is operative to drive the work roll 14 and is controlled in its operation by a mill motor speed control 22.
  • a computer 24 is operative to control the mill motor 20 through the mill motor speed control 22, and in turn to receive as a feedback signal from the mill motor speed control 22 signals in accordance with the operation of the mill motor 20.
  • a conventional mill motor apparatus 26 is operative with each arrests of the mill motor speed controls 22 and the screwdown position control 28, as is conventional in the well known operation of a rolling mill.
  • the screwdown motor 30 is controlled and positioned to vary the roll separation force between the work rolls 12 and 14 and thereby to determine the delivery thickness of the workpiece strip 32 passing through the rolling mill 10.
  • a thickness gauge 34 and a width gauge 35 are operative with the workpiece strip delivered from the rolling mill 10.
  • a thickness gauge 31 and a width gauge 33 are operative at the entry side of the rolling mill 10.
  • a temperature gauge 36 is operative with the entry side of the rolling mill 10 and the temperature gauge 38 is operative with the delivery side of the rolling mill 10 for the first pass.
  • a card reader 42 is operative with the computer 24 as is a manual input 40 for supplying predetermined information such as the initial workpiece temperature, the desired delivery thickness from each pass, the material composition and the like information.
  • FIG. 2 there is provided a diagrammatic showing of one form of control apparatus operative with a tandem rolling mill in accordance with t-he teachings of the present invention.
  • the tandem mill includes a rst stand 50, a second stand 52, and a stand S4, which might be the sixth stand for a six stand tandem mill.
  • a screwdown position control is provided for each stand of the mill, as is a workpiece thickness gauge and a w-orkpiece temperature gauge at the delivery side of the rst and second stands 50 and 52.
  • An X-ray gauge S6 is provided at the delivery side of the last stand 54 for providing an accurate measurement of the nal delivery workpiece thickness.
  • the thickness gauge and temperature gauge 58 and 60 operative with the first stand 50 provides thickness and temperature signals averaged for each predetermined increment of the workpiece strip 62 passing through the first stand 50.
  • a speed sensing device 64 is operative to measure the delivery speed of the workpiece strip 62 increments leaving the first stand 50, speed signals are supplied to a memory and shift register 66 operative with an interstand computer 68 for sequentially storing the incremental thickness and ternperature signals in synchronism with the movement of the workpiecestrip increments such that ⁇ this information is 'supplied as needed to the screwdown position control 70 for the stand 52 in synchronism with the passage of the corresponding workpiece increments through the second stand 52.
  • a central computer '/"2 is operative with the interstand computer 68 for coordinating the control of all the stands in accordance with the desired workpiece strip delivery thickness from the respective stands.
  • the thickness gauge 74 and the temperature gauge '76 are operative at the delivery side of the secondstand 52 with an interstand computer 78 operative with increment signals supplied to a memory and shif-t register 80 and responsive to the speed of the workpiece strip leaving the stand 52 as sensed by a speed sensing device 82 for synchronizing the incremental control information with the movement of the respective increments rbetween the second stand 52 and the next succeeding stand in the rolling mill.
  • the X-ray gauge 56 provides an overriding pattern control signal for determining the operation of all the stands to provide a desired actual delivery thickness for the workpiece strip leaving the last stand 54.
  • FIG. 3 there is shown work rolls 12 and 14 and backup rolls 16 and 18 which could be for the rolling V14 become substantially parallel.
  • the work rolls 12 and 14 are provided with a predetermined crown or contour shape such that they are thicker vin their center portion than at their edge portions. This is intentional in that as the backup rolls 16 and 1S are moved together by the screwdown motor 30 shown in FIGURE 1 there is a tendency for the work rolls and the backup rolls to bend such that the cont-acting surfaces of the work rolls 12 and This partially compensates for the roll bending.
  • FIG. 4 there is provided a curve to illustrate the total mill stretch for 11,000,000 pounds separation force as a function of product width from 25 inches to 130 inches wide and for 54 inch and 59 inch backup rolls respectively. This is shown as a typical illustration.
  • the information shown in FIG. 4 can be stored in the computer 24 shown in FIGURE 1 in the form of equations such that product width and the roll diameter can be used to derive the mill spring constant of t-he rolling mill stand for controlling the operation as will be subsequently explained.
  • FIG. 5 illustrates the bending exaggerated for clarity of the work rolls and backup rolls to be a function of product width and the roll diameters. If the workpiece passed through the rolling has a relatively narrow width .at the top and a relatively wide width at the bottom, even though the total roll separating force as seen by the top set of rolls and the bottom set of rolls would be equal, the top rolls would have the larger deflections since the -load is concentrated near the center of the rolls. The strength of the individual rolls is also affected by the roll diameter, particularly the backup roll diameter.
  • FIG. 6 illustrates the distribution of crown across the face of a typical mill where the center of the work roll diameter is 0.01 inch greater than the diameter at the edge of the work roll.
  • the upper part of FIG. 6 illustrates the calculated total roll separating force required to produce a workpiece plate of substantially uniform thickness for various widths, using the 0.01 inch crown.
  • the upper -line shows the force required when using a 72 inch 4backup roll and a lower curve illustrates the force required when using a 64 inch backup roll.
  • the force required t0 produce a plate of uniform thickness also decreases.
  • the lower curve of FIG. 6 shows that the difference in crown between the middle of the workpiece plate or strip and the edge of the workpiece when rolling a workpiece inches wide, with 50 inches from the center line of the mill to the edge of the plate, is 0.006 inch per roll.
  • the curve for 64 inch backup rolls shows that with this workpiece width a force of 1.5 million pounds would be required and a roll separating force of 2.7 million pounds would be required for 72 inch backup rolls to produce a substantially uniform thickness workpiece.
  • FIG. 8 illustrates how the drafting limits control the operation of the rolling mill.
  • the computer considers four different limits in determining the draft to be taken in each given pass. These are inches draft, percent draft, motor torque and separating force. The most important of these as shown in FIG. 8 patricularly on the latter passes is the roll separating force. By properly controlling this force the plate shape can be controlled and mechanical equipment can be protected.
  • FIG. 9 graphically indicates how the drafting limits are effective relative to cold and hot, either cold or wide workpieces on the one hand or on the other hand, hot or narrow workpieces as compared to thin and thick workpieces.
  • the motor torque limit is more effective for a thick workpiece which is wide and/or cold.
  • the inches draft limit is more effective for a thick piece which is narrow and/0r hot.
  • the roll separating force is more effective for a thin workpiece which is wide and/or cold, and the percent draft limit is more effective for a thin workpiece which is narrow and/ or hot. As is required 6 to control shape, force is the limiting factor on thin wide workpieces.
  • FIG. lO there is shown a rolling mill stand, which could be the stand 10 shown in FIG. l, including work rolls 12 and 14 operative with the workpiece strip 32.
  • a left screwdown device and a right screwdown device 102 are operative with the backup rolls to control the roll separating force at respectively the left edge and the right edge of the work rolls.
  • a left thickness gauge 104, a center thickness gauge 106 and a right thickness gauge 103 are opertaive with each respective increment ⁇ of the workpiece strip 32 to provide thickness signals to the shape' control apparatus 110. In this way the desired workpiece contour or cross-sectional shape can be maintained in accordance with the teachings of the present invention.
  • the delivery shape of the workpiece from any given pass or stand of the rolling mill can be monitored visually by a human operator however, thickness gauges lcan be provided to monitor the workpiece shape as illustrated in FIG. l0 of the drawings.
  • a crown control parameter in the operation controlling force equation is provided to correct for undesired errors in the delivery shape which may result from sev eral factors, for example, the temperature build-up at the center of the work rolls as compared to the edges of the work rolls where the water spray and conduction cooling through the bearings and the like are more effective.
  • FIG. 7 illustrates Vsuch a schedule by plotting the thickness versus the passes through the mill stands. lt is required that the initial 1.8 inch workpiece be reduced to 0.25 inch in the minimum number of passes.
  • Point 200 shows the minimum delivery thickness for pass 1 as determined by one of the four limits, point 202 shows the minimum thickness that can be delivered from pass 2, and so forth for points 204, 206, 208, 210, 212 and 214. After pass 8 the workpiece could be 0.24 inch thick which is less than the desired delivery thickness of 0.25 inch.
  • a round olf procedure is used by the computer to modify the schedule so that the delivery thickness after pass 8 will be 0.25 inch, but the drafting pattern will still be approximately the same as the original schedule.
  • the computer chooses new coordinates on the curve to designate the new passes one through Ieight primed, so that the thickness delivered from pass 8 is 0.25 inch.
  • the thicknesses for the other passes are determined by linear interpolation. For instance, the delivery thickness for pass 7 is determined by interpolating between points 210 and 212 to determine point 211 and to retain substantially the same pass reduction as initially provided.
  • the per unit crown desired in the workpiece after the last pass, PUC should be maintained in the workpiece on all of the latter passes in order to produce a flat piece which, during the latter critical passes, is 'elongated along the edges the same amount as down the middle of the workpiece.
  • the amount of roll bending required if the roll had no crown would be PUC (H1) where H1 is the entry thickness to the pass.
  • H1 the entry thickness to the pass.
  • the delivery thickness from this pass should be used but it is not known at this stage in the calculation. It is usually sufl'lciently accurate to use the entry thickness, if not some iterative process could be used to determine an approximate delivery height and improve on the accuracy by repeating the calculation several times.
  • CD is twice the difference in diameter of the rolls at the center as compared to the crown at the edge of the strip being rolled.
  • the difference in roll diameter between the center of the roll and 50 inches Vfrom the center is (D10-.006) or 0.004.
  • CD in this case would I'oe equal to 2 .004 or .008.
  • F [PUC(H1)+CD(CC)] XFC/CD
  • the plastic curve 240 is determined from measured data for the particular workpiece material to be rolled.
  • the force required for the desiredV crown is calculated using the above force formula and is shown by the point 242 on the plastic curve to be in the ord-er of 5.6 million pounds. This provides a delivery thickness 244 which is limited by roll separation force.
  • the inches draft limit is calculated by the formula where MD is the maximum inches draft and gives the limit 246.
  • the computer control with the proper stored program based on careful study of process requirements in the production equipment ratings and capabilities can utilize the rolling mill to its fullest, and yet assure staying within safe limits.
  • the computer control as'sures good equipment life and minimizes down time caused by wrecking of the rolling mill through excessive 8 overloading.
  • the computer can calculate the number of passes of the workpiece through the mill as well as the drafting practice that is followed, reliable feedback signals of roll force as obtained from the load cells 37 shown in FIG. 1 and mounted within the mill structure are neded in order to take into account the stretching of the mill housing.
  • the X-ray gauge and width gauge signals are fed from the mill to the computer control for comparison purposes and as a means of upgrading the operation in modifying the information contained in the stored program.
  • One typical reversing plate mill system receives carbon and alloy steel slabs ranging from 4 inches to 24 inches thick, 40 inches to 75 inches wide and 54 inches to 264 inches in length and weighing up to 70,000 pounds. The mill reduces these slabs by a series of passes through the mill to finished plate ranging in size from g/g inch to inches thick, approximately 200 inches wide, and 125 feet long. This typical plate mill is powered by two 6,000
  • sensing devices include a pulse generating position indicator for the screwdown setting and the side guide positions, hot metal detectorsfor positioning the metal in relation to its stage in process, roll force measuring transducers mounted within the mill housings for indications of forces occurring during rolling which can be translated into stretching etTect-s of the mill housing, X-ray gauges which are used during part of the process to provide feedback information of actual thickness of the metal, and width and length gauges for providing signals to the computer system of the dimensional aspects ofthe workpiece plate and process.
  • the conventional automatic regulated control systems associated with rolling mills are provided, such as the direct current adjustable voltage drive systems and similar electrical systems including regulating systems, and similar protective features.
  • the computer system governs the overall operation of the rolling mill process, and includes the input information equipment for the computer and central process control along with the necessary input and output devices associated with the command set point control and data transmission features of the system.
  • the input information to the computer can be in punch c-ard form and will include the incoming slab dimensions, the desired plate dimensions and the alloy. Thus the input information required to a system of this type is minimal.
  • the number of passes, the draft for each pass, and the point during therolling operation at which the bars are to 'be turned are all controlled by the computer control.
  • Such a condition is recognized by proper feedback of signals from the senser equipment onthe mill. This will if desired enable the mill to roll each plate in the minimum number of passes thus reducing the time of work in process.
  • the roll force and screwdown settings are used along with the mill constants identifying the modulus elasticity of the mill and other factors to determine the thickness of the workpiece as rolled in accordance with the formula hzS-l-F/M during passes when the workpiece is thicker than two inches.
  • the X-ray gauges are used to measure the thickness of the plate when it is less than two inches. Under such latter conditions the computer compares a calcul-ated thickness using the roll force in comparison with a measured thickness from the X-ray gauge as fed back fromthe gauges. Any errors due to roll wear or changesin temperature of mechanical parts of the mill or other effects are thus taken care of by an automatic correction of the equations being employed in the stored program of the computer.
  • sensing device such as roll separating force transducers, length gauges and hot mill X-ray gauges are very useful tools for monitoring the operation of a rolling mill.
  • An online computer can utilize the information gathered and in this manner control the complicated operation to -produce a quality product at a high rate in spite of variations in incoming workpiece dimensions and temperatures.
  • strip shape control teachings of the present invention are intended to be added to or combined with the presently well known rolling mill apparatus. Further it should be understood that the teachings of the present application are readily adaptable to single or multiple stand mills, either tandem or reversible mills. IF-or reversible mills it should be understood that thickness gauges will be provided at the delivery ends of the respective mills for each direction of strip movement.
  • the method of controlling the shape of a workpiece passed through a rolling mill having'a pair of rolls, with t the separation force between said rolls being controlled by a screwdown mechanism comprising the steps of predicting a pass roll separation force in accordance with a predetermined relationship'with the incoming thickness and width of the workpiece, and the crown of the rolls through use of the force equation wherein PUC is the desired per unit crown, H1 is the 'entry thickness to the pass, CD is proportional to the roll crown, CC is a provided correction factor and FC is the force required to remove the roll crown CD; predicting a pass screwdown position setting in accordance with a predetermined relationship with the desired delivery thickness of the workpiece,said predicted pass roll sep-aration force and a predetermined mill spring characteristic for said rolling mill, and passing the workpiece through said rolling mill between said rolls with said 10 screwdown mechanism positioned in accordance with said predicted pass screwdown position setting.
  • the method of controlling the cross-sectional shape of a workpiece passed through a rolling mill between a pair of rolls, with the separation force between said rolls being controlled by a screwdown mechanism comprising the steps of predicting a iirst pass roll separation force in accordance with an empirically predetermined relationship with the incoming thickness of the workpiece, the incoming ywidth of the workpiece, and the known crown of the rolls and rthe desired per unit crown of the rolled workpiece; predicting a first pass screwdown position setting in accordance with a predetermined relationship with the desired delivery thickness of the workpiece, said predicted rst pass roll separat-ion force and a predetermined mill spring characteristic for said rolling mill; and passing the workpiece through said rolling mill between said rolls after said screwdown mechanism has been positioned in accordance with said predicted first pass screwdown position setting.
  • the method of con-trolling the shape of a workpiece making at least two passes through a rolling mill having a pair of rolls for each pass with the desired delivery thickness of said workpiece after each of at least said two passes being predetermined, and a screwdown mechanism being provided to control the relative positions of said pair of rolls for each pass comprising the steps of determining a pass roll 4separation force for each pass in accordance respectively with a first predetermined relationship with at least the incoming thickness of the workpiece for each pass, the incoming width of the workpiece for each pass, the desired per unit crown of the workpiece when delivered from each pass and the crown of the rolls; determining a pass screwdown position setting during the respective pass; sensing the presence of any error in the workpiece actual delivery shape compared to a predetermined workpiece desired shape to provide a correction signal after each pass; and modifying the next pass'roll separation force in accordance with said correction signal provided after a given pass to correct for the shape error present after said given pass.
  • h is the delivery thickness
  • S is the operation separation setting
  • F is said operation separation force
  • M is a predetermined mill spring constant

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Metal Rolling (AREA)
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US276268A 1962-09-21 1963-04-29 Workpiece shape control with a rolling mill Expired - Lifetime US3248916A (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
BE637693D BE637693A (pt) 1962-09-21
BE637694D BE637694A (pt) 1962-09-21
US276269A US3253438A (en) 1962-09-21 1963-04-29 Automatic strip gauge control for a rolling mill
US276268A US3248916A (en) 1962-09-21 1963-04-29 Workpiece shape control with a rolling mill
GB37076/63A GB982231A (en) 1962-09-21 1963-09-20 Improvements in or relating to workpiece control in rolling mills
FR948282A FR1447915A (fr) 1962-09-21 1963-09-21 Réglage automatique des dimensions d'une bande passant dans un laminoir
FR948281A FR1381347A (fr) 1962-09-21 1963-09-21 Réglage de la forme d'une pièce à usiner dans un laminoir
GB37077/63A GB982232A (en) 1962-09-21 1963-10-20 Improvements in or relating to automatic strip gauge control for a rolling mill

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US22535062A 1962-09-21 1962-09-21
US276269A US3253438A (en) 1962-09-21 1963-04-29 Automatic strip gauge control for a rolling mill
US276268A US3248916A (en) 1962-09-21 1963-04-29 Workpiece shape control with a rolling mill

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US276269A Expired - Lifetime US3253438A (en) 1962-09-21 1963-04-29 Automatic strip gauge control for a rolling mill

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US3468145A (en) * 1965-06-16 1969-09-23 British Iron Steel Research Billet mill wherein the rolling gap is controlled during the penultimate pass and fixed during the final pass
US3526114A (en) * 1965-04-23 1970-09-01 British Iron Steel Research Rolling of strip
US3534571A (en) * 1968-03-14 1970-10-20 Alcan Res & Dev Rolling mill control
US3630055A (en) * 1969-05-14 1971-12-28 Gen Electric Workpiece shape control
US3634664A (en) * 1969-04-04 1972-01-11 Bendix Corp Adaptive and manual control system for machine tool
US3641325A (en) * 1969-02-21 1972-02-08 Nippon Kokan Kk Method of computer control of rolling mills
US3731508A (en) * 1969-09-03 1973-05-08 British Iron Steel Research Rolling of strip or plate material
JPS4920868B1 (pt) * 1970-01-12 1974-05-28
US3850020A (en) * 1973-12-10 1974-11-26 Jones & Laughlin Steel Corp Rolled strip shape control using work roll screwdown changes
US3882709A (en) * 1972-10-16 1975-05-13 Nippon Steel Corp Method for controlling the profile of workpieces on rolling mills
US3890817A (en) * 1973-08-23 1975-06-24 Gec Elliott Automation Ltd Methods of rolling strip materials, and strip materials rolled thereby
US4137741A (en) * 1977-12-22 1979-02-06 General Electric Company Workpiece shape control
WO1990000451A1 (en) * 1988-07-11 1990-01-25 Blazevic David T Apparatus and method for dynamic high tension rolling in hot strips mills
US4907434A (en) * 1987-10-07 1990-03-13 Sumitomo Light Metal Industries, Ltd. Method and device for controlling strip thickness in rolling mills
US5010756A (en) * 1988-11-29 1991-04-30 Kabushiki Kaisha Kobe Seiko Sho Method of and apparatus for controlling shape of rolled material on multi-high rolling mill
US5379237A (en) * 1990-05-31 1995-01-03 Integrated Diagnostic Measurement Corporation Automated system for controlling the quality of regularly-shaped products during their manufacture
US5390519A (en) * 1992-11-27 1995-02-21 Nippondenso Co., Ltd. Method for manufacturing long products by press working
US5414648A (en) * 1990-05-31 1995-05-09 Integrated Diagnostic Measurement Corporation Nondestructively determining the dimensional changes of an object as a function of temperature
US20060090515A1 (en) * 2004-11-03 2006-05-04 Simon Jonathan S Control for an I.S. machine
US20140331730A1 (en) * 2011-11-19 2014-11-13 Jilin University Rolling device and the method thereof
CN112337982A (zh) * 2020-10-21 2021-02-09 河南中孚高精铝材有限公司 一种冷轧机的断带保护控制方法
US11383279B2 (en) * 2019-06-14 2022-07-12 Toshiba Mitsubishi-Electric Industrial Systems Corporation Plate thickness control device and plate thickness control method
CN117019884A (zh) * 2023-10-08 2023-11-10 东北大学 一种冷连轧各机架出口板形预测可视化方法

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DE1290234B (de) * 1962-12-24 1969-03-06 Siemens Ag Einrichtung zur Regelung der Walzgutdicke in Warmwalzwerken
GB1243806A (en) * 1967-10-23 1971-08-25 Westinghouse Electric Corp Apparatus for controlling a rolling mill
US3525082A (en) * 1967-10-23 1970-08-18 Hermann Borge Funck Jensen Conditional alternative program branching in automated working machines
US3568637A (en) * 1968-05-13 1971-03-09 Westinghouse Electric Corp Tandem mill force feed forward adaptive system
FR1581023A (pt) * 1968-07-05 1969-09-12
JPS4918910B1 (pt) * 1969-02-08 1974-05-14
US3592030A (en) * 1969-06-05 1971-07-13 Westinghouse Electric Corp Rolling mill stand screwdown position control
US3803887A (en) * 1969-06-13 1974-04-16 Hitachi Ltd Control device for rolling mills
US3624369A (en) * 1969-08-04 1971-11-30 Ruloff F Kip Jr Thickness reduction control systems
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IT971656B (it) * 1971-12-11 1974-05-10 Nippon Steel Corp Sistema automatizzato per il controllo della laminazione di una sezione di acciaio
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US3526114A (en) * 1965-04-23 1970-09-01 British Iron Steel Research Rolling of strip
US3468145A (en) * 1965-06-16 1969-09-23 British Iron Steel Research Billet mill wherein the rolling gap is controlled during the penultimate pass and fixed during the final pass
US3534571A (en) * 1968-03-14 1970-10-20 Alcan Res & Dev Rolling mill control
US3641325A (en) * 1969-02-21 1972-02-08 Nippon Kokan Kk Method of computer control of rolling mills
US3634664A (en) * 1969-04-04 1972-01-11 Bendix Corp Adaptive and manual control system for machine tool
US3630055A (en) * 1969-05-14 1971-12-28 Gen Electric Workpiece shape control
US3731508A (en) * 1969-09-03 1973-05-08 British Iron Steel Research Rolling of strip or plate material
JPS4920868B1 (pt) * 1970-01-12 1974-05-28
US3882709A (en) * 1972-10-16 1975-05-13 Nippon Steel Corp Method for controlling the profile of workpieces on rolling mills
US3890817A (en) * 1973-08-23 1975-06-24 Gec Elliott Automation Ltd Methods of rolling strip materials, and strip materials rolled thereby
US3850020A (en) * 1973-12-10 1974-11-26 Jones & Laughlin Steel Corp Rolled strip shape control using work roll screwdown changes
US4137741A (en) * 1977-12-22 1979-02-06 General Electric Company Workpiece shape control
US4907434A (en) * 1987-10-07 1990-03-13 Sumitomo Light Metal Industries, Ltd. Method and device for controlling strip thickness in rolling mills
US4909055A (en) * 1988-07-11 1990-03-20 Blazevic David T Apparatus and method for dynamic high tension rolling in hot strip mills
WO1990000451A1 (en) * 1988-07-11 1990-01-25 Blazevic David T Apparatus and method for dynamic high tension rolling in hot strips mills
US5010756A (en) * 1988-11-29 1991-04-30 Kabushiki Kaisha Kobe Seiko Sho Method of and apparatus for controlling shape of rolled material on multi-high rolling mill
US5379237A (en) * 1990-05-31 1995-01-03 Integrated Diagnostic Measurement Corporation Automated system for controlling the quality of regularly-shaped products during their manufacture
US5414648A (en) * 1990-05-31 1995-05-09 Integrated Diagnostic Measurement Corporation Nondestructively determining the dimensional changes of an object as a function of temperature
US5608660A (en) * 1990-05-31 1997-03-04 Integrated Diagnostic Measurement Corp. Automated system for controlling the quality of geometrically regular-shaped products during their manufacture
US5390519A (en) * 1992-11-27 1995-02-21 Nippondenso Co., Ltd. Method for manufacturing long products by press working
US20060090515A1 (en) * 2004-11-03 2006-05-04 Simon Jonathan S Control for an I.S. machine
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US20140331730A1 (en) * 2011-11-19 2014-11-13 Jilin University Rolling device and the method thereof
US11383279B2 (en) * 2019-06-14 2022-07-12 Toshiba Mitsubishi-Electric Industrial Systems Corporation Plate thickness control device and plate thickness control method
CN112337982A (zh) * 2020-10-21 2021-02-09 河南中孚高精铝材有限公司 一种冷轧机的断带保护控制方法
CN117019884A (zh) * 2023-10-08 2023-11-10 东北大学 一种冷连轧各机架出口板形预测可视化方法
CN117019884B (zh) * 2023-10-08 2023-12-29 东北大学 一种冷连轧各机架出口板形预测可视化方法

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US3253438A (en) 1966-05-31
BE637694A (pt)
BE637693A (pt)
GB982231A (en) 1965-02-03
FR1447915A (fr) 1966-08-05
FR1381347A (fr) 1964-12-14
GB982232A (en) 1965-02-03

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