EP0037834A1 - Procede de controle de la largeur d'une plaque laminee - Google Patents

Procede de controle de la largeur d'une plaque laminee Download PDF

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Publication number
EP0037834A1
EP0037834A1 EP79901378A EP79901378A EP0037834A1 EP 0037834 A1 EP0037834 A1 EP 0037834A1 EP 79901378 A EP79901378 A EP 79901378A EP 79901378 A EP79901378 A EP 79901378A EP 0037834 A1 EP0037834 A1 EP 0037834A1
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EP
European Patent Office
Prior art keywords
width
plate
rolled
amount
variation
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Granted
Application number
EP79901378A
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German (de)
English (en)
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EP0037834A4 (fr
EP0037834B1 (fr
Inventor
Takashi Shibahara
Teruo Kohno
Yoshisuke Misaka
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.)
Nippon Steel Corp
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Sumitomo Metal Industries Ltd
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Publication date
Application filed by Sumitomo Metal Industries Ltd filed Critical Sumitomo Metal Industries Ltd
Publication of EP0037834A1 publication Critical patent/EP0037834A1/fr
Publication of EP0037834A4 publication Critical patent/EP0037834A4/fr
Application granted granted Critical
Publication of EP0037834B1 publication Critical patent/EP0037834B1/fr
Expired 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
    • B21B37/22—Lateral spread control; Width control, e.g. by edge rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
    • B21B38/04—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring thickness, width, diameter or other transverse dimensions of the product

Definitions

  • the present invention relates to width control of a rolled metal product produced by a hot strip mill and more particularly to a method for reducing or eliminating variation in width resulting from the hot rolling.
  • a hot rolling operation is carried out through a train of roughing rolls in which a plurality of vertical roll stands and a plurality of horizontal roll stands are arranged in series and alternately one after another. It has been the general practice in a rolling operation to set the roll gaps or the degrees of opening of the vertical roll stands at a desired roll opening prior to the feeding of the slab or material into the roll-stands, and such predetermined roll gaps are usually kept unchanged throughout the rolling operation for that material. Due to uneven distribution of temperatures or so-called skid marks in the slabs generated in the furnace, there is inevitably a possibility of variation in width of the rolled product such as strip and the like if such roll gaps are kept unchanged during the rolling operation.
  • the method of controlling the rolled product width according to the Japanese Patent Publication No. 26,503/1977 specification was on the assumption that such width variation would occur from the cause of uneven temperature distribution in the longitudinal direction of a slab to be rolled, and this led to adjusting the roll gap of the vertical rolls in accordance with the temperature variation existing in the longitudinal direction of the slabs or materials.
  • the well known prior methods of controlling the rolled strip widths along the entire longitudinal areas of the materials to be rolled are those disclosed in the Japanese Patent Publication No. 25,823/1976, the Japanese Patent Laid-Open Application No. 72,350/1977, the Japanese Patent Publication No. 24,907/1975, and the Japanese Patent Laid-Open Application No. 87,455/1976.
  • a slab or material is rolled by the vertical rolls in such a manner that the width spread in a material rolled therefrom will merely be relatively increased or decreased in inverse proportion to the width of a material to be rolled.
  • the method disclosed in the Japanese Patent Laid-Open Application No. 72,350/1977 is directed to the control of roll gap of the vertical rolls and is based on the assumption that the amount of width spread in a material obtained by the vertical rolling operation followed by the horizontal rolling operation is determined as a'function of the longitudinal position (distance from the leading end) of the material, which comprises the steps of applying the thus- presumed relationship as a width spread factor to each con- bination of the thickness and the width of the material, and setting a pattern to be utilized for controlling the opening of the vertical rolls so as to control the above mentioned width spread according to the factor above.
  • 24,907/1975 is concerned with the control of the roll gap of the vertical rolls and is premised on the calculation based on the equation relative to the width spread of the material to be rolled which is determined solely in connection with the given rolling conditions, while the method disclosed in the Japanese Patent Laid-Open Application No. 87,455/1976 is also concerned with the provision of the gap control of the vertical rolls in consideration of the state of width spread of the material to be rolled which is likewise defined exclusively under the rolling conditions.
  • the present inventors carried out a series of field studies over a long period of time based on the actual profiles of rolled materials delivered from the vertical rolls, the extent of width variation of the rolled materials delivered from the horizontal rolls disposed immediately after that vertical rolls, and also upon the temperature distribution in the transverse or widthwise direction of the rolled materials.
  • skid-free areas there were some areas free from any effect of heat shielding produced by the skid arrangement in the furnace (hereinafter referred to as “skid-free areas”) and other areas which showed the effect of heat shielding by the skid arrangement (hereinafter referred to as "skidded areas”) existing alternately in the longitudinal direction of a-slab fed from the furnace as stated hereinbefore, and it was proven that the principal of cause of such width variation in a rolled bar as mentioned hereinbefore is a substantial difference in the cross-sectional shape of the rolled material between the skidded areas and the skid-free areas thereof immediately after a vertical rolling operation.
  • the present invention is essentially directed to the provision of an improved method for controlling the width variation of a rolled bar in which a necessary amount of width reduction by a vertical roll stand is calculated from the amount of bulging or elevation in thickness at the lateral margin of a material to be rolled in the widthwise or transverse direction thereof is different between the skidded areas and the skid-free areas of the material, whereupon the roll gap or opening of the vertical roll stand can be controlled properly.
  • the term “slab” is used for the raw material to be fed to a train of roughing rolls, the term “material” for the material undergoing the rolling operation and the term “bar” or "rolled bar” for the material delivered out of the train of roughing rolls.
  • Figs. la, lb and lc are illustration for showing the cause of a width variation of a rolled bar that is the premise of the present invention; among which Fig. la is a fragmentary cross-sectional view showing a lateral margin of a material taken at the entry side of a vertical roll stand, Fig. lb is a similar cross-sectional view showing a skidded area in broken line and a skid-free area in solid line in a material at the delivery side of the vertical rolls, and Fig.
  • lc is a similar cross-sectional view showing a skidded area in broken line and a skid-free area in solid line on the same lateral margin of a material immediately after delivered from the horizontal rolls, hatching being omitted from all of the figures for the convenience of drawing:
  • Fig. la is presented to show, in cross-section, a lateral margin of a material to be rolled at the entry side of the vertical rolls, Fig. lb showing the same section of the material rolled at the delivery side of the vertical rolls, and Fig. lc showing the same section of the material delivered from the horizontal rolls immediately after the vertical rolls.
  • Fig. la is presented to show, in cross-section, a lateral margin of a material to be rolled at the entry side of the vertical rolls
  • Fig. lb showing the same section of the material rolled at the delivery side of the vertical rolls
  • Fig. lc showing the same section of the material delivered from the horizontal rolls immediately after the vertical rolls.
  • the .lateral margin of the material taken immediately after a vertical rolling operation exhibits a bulging or elevation in thickness of a dog-bone like shape in cross-section, regardless of its being a skidded area shown in broken line or its being skid-free area shown in solid line.
  • bulging in the skidded area is greater than in the skid-free area, and particularly the bulging becomes significantly greater near the lateral edge of the skidded area.
  • Such difference in extent of bulging and configuration between the skidded area and the skid-free area will result in variation or difference in the material width as typically shown in Fig. lc taken after a horizontal rolling operation in such a manner that the skidded are (shown in broken line) brings a greater width spread than that of the skid-free area (shown in solid line).
  • the lateral margin of the material having the skidded area is considered to exhibit remarkable bulging immediately after a vertical rolling operation for the following reason. That is, in a typical temperature distribution across the width of a meterial to be rolled, as shown in Fig. 2, it is considered that the temperature of the middle area (A) across the width of a material is higher than that of the lateral marginal portions (B) thereof in the skid-free area (as shown in solid line), while the temperature of the middle area (A) is lower than that of the lateral marginal portions (B) in the skidded area (shown in broken line).
  • the middle area (A) of the material having the skidded area is not easily extended in the longitudinal direction (the rolling direction) thereof as the degree of restricting effect in this direction is high, and therefore, such bulging would be concentrated at the lateral marginal portions of the material at the time of a vertical rolling operation.
  • the present invention comprises the steps of measuring the width of a material to be rolled over at least the entire middle area thereof out of the entire longitudinal area thereof at the delivery side of any one of horizontal roll stands disposed in the middle of the train of roughing roll stands; determining respective local coefficients of width spread due to bulging at the lateral marginal portions for at least all the middle area out of the entire-longitudinal area of the material to be rolled based on the values of the variation in width of the respective portions in the longitudinal direction which are derived from the measurement above, the degree of width reduction at each of the vertical roll stands upstream of the measuring point and a reference coefficient of width spread empirically determined by the rolling conditions; thereafter calculating a desired amount of modification of the opening in the vertical roll stand over at least the entire middle area of the material in order to have the value of width variation at the respective portions reduced substantially to zero at the end of the train of roughing roll
  • skid-free area is a portion which is free from an effect of heat shielding due to the skid arrangement within the furnace
  • the temperature of such skid-free area is generally highest among any other portions of the slab.
  • the width of the rolled material will become narrowest at the portions corresponding to the skid-free areas over the entire middle area extending in the longitudinal direction of the material.
  • the skidded areas are subjected to the effect of the skid arrangement in the furnace, and therefore, are generally low in temperature in comparison with the skid-free areas thereby becoming substantially wide portions in the rolled material or bar.
  • the amount of width variation means a difference in width of the material between the skidded areas and the skid-free areas.
  • ⁇ H i ⁇ 1 ⁇ AV i
  • ⁇ V i the amount of width reduction at a skid-free area rendered by a vertical roll stand
  • ⁇ 1 a ratio of contribution to a bulging formation at the lateral marginal portions of a material (hereinafter referred merely to as "a bluging") to the amount of width reduction at the skid-free area.
  • the amount of width spread ⁇ B i contributed from the bulging at the skid-free area of the material observed at the "i-th" horizontal roll stand -- that is the one immeidately following the "i-th" vertical roll stand is represented as follows; i.e., If a product of ⁇ 1 and y 2 is y,'the above equation may be converted as follows; i.e., Now, let us call this y value the coefficient of width spread due to the bulging of the skid-free area.
  • the amount of width reduction at the skidded area rendered by the "i-th" vertical roll stand ⁇ V Si is represented as follows; i.e., where, ⁇ W i-1 represents a difference in width of the material or an amount of width variation between the above mentioned skidded area and skid-free area at the delivery side of the "i-1 th" horizontal roll stand, and W Ei represent an amount of width variation of the material at the delivery side of the "i-th" vertical roll stnad.
  • amount of width spread ⁇ B Si contributed from - the bulging at the skidded area of the material at the delivery side of the "i-th" horizontal roll stand may be represented as follows; where, ⁇ S represents a coefficient of width spread due to the bulging at the skidded area.
  • ⁇ S represents a coefficient of width spread due to the bulging at the skidded area.
  • W E i is defined to be positive in the case that the width of the material at the skidded area is.greater than that of the material at the skid-free area.
  • the amount of width variation ⁇ W i observed at the delivery side of the "i-th" horizontal roll stand is represented by the following equation, i.e., The extent of width variation at the delivery side of the vertical roll stand is usually of a very small value, then ⁇ W i >> ⁇ W Ei ⁇ W i-1 >> ⁇ W Ei the above mentioned extent of width variation ⁇ W i may be represented as follows;
  • the skid-free area is not affected by the skid, and therefore, the coefficient y of width spread due to the bulging is generally dependent empirically on such rolling conditions, in practice, as material dimensions (width and thickness), the temperature of the furnace, the kind of steel to be rolled, the pass schedule, etc.
  • the coefficient ⁇ S of width spread due to bulging at such affected areas may vary with the influence of such skid arrangement upon such areas.
  • the coefficient of width spread due to bulging at the skid-free area is referred to as “reference coefficient of width spread due to bulging”
  • the coefficient of width spread due to bulging at the respective skidded areas is called as “local coefficient of width spread due to respective bulging”
  • the local coefficient ⁇ S of width spread due to respective bulging may be obtained from a calculation. For instance, in the case a rolling reduction is modified at the "m-th" vertical roll stand by way of controlling a roll gap, the local coefficient y of width spread due to respective bulging mentioned above is led from the calculation as follows.
  • the amount of width variation ⁇ W m-1 of the material at the delivery side of the "m-1 th" horizontal roll stand upstream of the abovementioned "m-th" vertical roll stand may be obtained from repeated application of the equation (4) above, as follows; i.e., where, ⁇ W o is the amount of width variation of the material before rolled (i.e., the slab), and therefore, ⁇ W o ⁇ 0, and then, the equation (5) above is now converted as follows; i.e.,
  • each of the amounts of width reduction ⁇ V m-1 , A V m-2 , ... AV 1 and the reference coefficient y of width spread due to bulging are values empirically dependent on the rolling condition.
  • the amount of width variation ⁇ W m-1 of the material at the delivery side of the "m-1 th" horizontal roll stand is obtained from a field measurement, and consequently, the local coefficient ⁇ S of width spread due to respective bulging can be derived from well known repeated calculation on the basis of the equation (6) above.
  • the amount of width variation ⁇ W m of the material at the delivery side of the "m-th" horizontal roll stand i.e., the one immediately after the above mentioned vertical roll stand
  • ⁇ V m for ⁇ V i
  • ⁇ W m-1 for ⁇ W i-1
  • Av for ⁇ W Ei in the equation (3) above; i.e.,
  • the amount of width variation ⁇ W n of the material at the delivery side of the "n-th" horizontal roll stand i.e., the last one of the train of roughing roll stands may be represented by way of repeated application of the equation (4) above till the "m-th" one as follows; i.e., Therefore, substituting the value ⁇ W m in the equation (7) above into the equation (8) above, the amount of width variation ⁇ W n of the material at the delivery side of the train of roughing roll stands with the rolling reduction being modified at the "m-th" vertical roll stand as mentioned above is now represented by the following equation; i.e.,
  • ⁇ v m the amount of width reduction to be increased, i.e., the amount of modified width at the "m-th" vertical roll stand which may reduce the amount of width variation OWn at the delivery side of the train of roughing roll stands to zero is then represented as follows; i.e.,
  • the value ⁇ v m * to be applied for screwdown -- that is, the desired amount of roll gap change for the skidded area of the material -- is obtained from the following equation; i.e., where, Q represents a gradient of the plastic deformation curve, and K represents a rigidity coefficient of the "m-th" vertical roll stand. Also, ⁇ W Em represents the amount of width variation for the case that the "m-th" vertical roll stand is not modified with its rolling reduction, and usually, ⁇ v m » ⁇ W Em , so the above equation is now led as follows; i.e.,
  • the desired amount of modified rolling reduction may be derived from the equation (11) above.
  • the amount of width variation AW n of the material at the delivery side of the last one of the train of roughing roll stands, i.e., the "n-th" horizontal roll stand may be represented as follows; i.e.,
  • the equation (14) may then be as follows; i.e.,
  • the amount of width reduction ⁇ V n , ⁇ V n-1 , ... ⁇ V m ', and the reference coefficient y of width spread due to bulging are empirically dependent on the rolling conditions to be set, and that the amount of width variation ⁇ W at the delivery side of the "m-1 th" horizontal roll stand may be attained from a field measurement, and once this measurement value is obtained, the local coefficient ⁇ s of width spread due to bulging in this case may also be derived from the equation (6) above.
  • the necessary modification value to be applied in the opening of the vertical roll stand can be obtained for each of the portions, the skidded areas, of the material where the variation in width is expected. Accordingly,.it will be foreseen that the width variation in the longitudinal direction of the rolled bar may be reduced substantially to zero by performing the calculation above for each of the portions of the material where such variation is to be expected.
  • the width of the skid-free portions is measured at the intermediate point after one of the horizontal roll stands in the train of roughing rolls and the mean value thereof is used as a reference width for calculating the width variation.
  • the present invention is essentially based on the principle heretofore expalined. Generally, it is known that a plurality of skid-free areas exist in a single slab fed from the furnace. According to this invention, if and when the actual width of a portion is greater than the reference width stated above even at the skid-free areas, such portion shall be subjected to an application of increased width reduction. While all what is given herein is particularly concerned with the case in which increase of width reduction of a material is provided during the rolling operation, it is needless to mention that it is necessary to decrease the amount of width reduction in case the width of the material is less than the reference width at a certain portion thereof.
  • the amount of width variation at the longitudinal ends or at the leading end and/or the trailing end of a material to be rolled is greater than that at the longitudinal middle area thereof. It is, of course, possible to practice the method of the present invention at such portions-- i.e. the leading and trailing ends of the material. Incidentally, it is not necessarily intended that the present invention will be used for control over all of the longitudinal area of the material, but it is essential to control width variation at least over the middle area out of the entire longitudinal area of such material.
  • the width measurement of the material undergoing rolling operation through the train of roughing roll stands may be conducted at delivery side of any of the horizontal roll stands except for the first and last horizontal roll stands in the train.
  • a pulse generator 4 attached on the stand R 3 functions to measure the number of revolutions of the rolls from the moment of engagement of the material 1.
  • a width gauge 2 disposed at the delivery side of the stand R 3 measures continuously the width of the material 1 at the delivery side thereof.
  • an operation and memory unit 5 function to recognize the longitudinal position of a point of width measurement on the material 1 and also operate amounts of width variation at respective points, and then the thus-obtained values of width variations are given in . correspondence to the longitudinal position of the material 1, whereby a distribution of width variation values in the longitudinal direction of the material 1 is now operated and so stored.
  • a pass schedule operation unit 7 operates, upon the entry of such input signals representing a thickness and a width of a slab before being rolled by the train of roughing roll stands, a desired thickness and a desired width of a rolled bar at the delivery side of the train of roughing roll stands, as well as such rolling factors as a coefficient of mill rigidity of each stand and a maximum output of each mill drive motor, to attain a pass schedule for the entire roll train.
  • the results 7a of this operation and a signal 5a received from the unit 5 representing distribution of width variation are fed to an operation unit 6, the unit 6 operates the local coefficient y S of width spread due to respective bulging.
  • a roll opening control unit 9 disposed at the stand E 4 operates, upon receipt of an output 8a from the operation unit 8 and a signal 5b representing distribution of width variation from the operation and memory unit 5, to obtain the roll opening control value required for the modification of width reduction.
  • This unit 9 then recognizes the current rolling position of the material 1 from the relationship with the longitudinal position thereof by way of signals lla and 12a from the load cell 11 and the pulse generator 12, respectively of the stand E 4 , and determining an amount of control required at that rolling position as a signal 9a and feeds the signal 9a to a screwdown unit 10. In accordance with such signal the unit 10 sends a screwdown signal 10a to the stand E 4 thereby controlling the roll opening at that stand.
  • the measure value of width variation ⁇ W 3 between a point which represents a typical skidded area and a point representing a typical skid-free area of the material at the delivery side of the stand R 3 was 5.2 mm.
  • the local coefficient YS of width spread due to respective bulging was 0.77.
  • the reference coefficient y of width spread due to bulging was 0.70 from the field data available.
  • a broken line shows the width change of the case where no modification in width reduction was practiced at the stand E (the conventional method), while a solid line showing that of the case where the modification in width reduction was practiced at the stand E 4 (according to the present invention).
  • the present invention in order to attain substantially no width variation of the rolled bar at the delivery side of the train of roughing roll stands, it is noted that there should be provided a modification in width reduction such that the width of the material at the skidded area is made narrower than that at the skid-free area.
  • the amount of increased witdh reduction ⁇ v turned out to be 9.7 mm
  • the value ⁇ v m * to be applied for screwdown was 10.9 mm at the stand E 4 .
  • Figs. 6a, b and c the results of filed measurement and calculation of such width variation existing over the longitudinal areas of the material.
  • Fig. 6a shows the amount of width variation measured by the width gauge disposed at the delivery side of the stand R 3
  • a broken line in Fig. 6c shows the measurement of width variation of the material processed by the conventional method at the delivery side of the train of roughing roll stands wherein no modification was effected at the stand E 4 .
  • a modification in width reduction was effected at the stand E 4 as typically shown in Fig. 6b, and such modification could reduce the variation in width at the delivery side of the train of roughing roll stands to within the range of ⁇ 0.5 mm, i.e. within 1.0 mm variation, as shown by the solid line of F ig. 6c.
  • the respective abscissas in Fig. 6 indicate the longitudinal direction of the material to be rolled.
  • Fig. 6c is reduced in scale to allow for possible elongation in the longitudinal direction of the material downstream of the stand E 4 so that the longitudinal position thereof may correspond to those shown in Figs. 6a and 6b.
  • the present invention provides a markedly advantageous method of controlling or minimizing width variation of rolled bar.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Metal Rolling (AREA)

Abstract

Procede d'egalisation de la largeur d'une plaque laminee par un procede de laminage d'ebauche a chaud pour laminer une plaque a l'aide de laminoirs verticaux et horizontaux disposes alternativement, en particulier un procede de controle de la largeur d'une plaque. Le procede vise a eliminer les variations de largeur de la plaque dues aux differences de distribution de la temperature essentiellement entre une unite a sabot et une unite sans sabot a la sortie du laminoir d'ebauche dans la direction laterale de la plaque. Le present procede consiste a mesurer la largeur d'une plaque a laminer avec un dispositif de mesure de largeur de plaque (2) de maniere a obtenir le coefficient d'expansion des largeurs accrues aux extremites de la plaque dans sa direction laterale, laquelle plaque etant laminee dans la direction longitudinale sur toute une zone d'au moins sa partie intermediaire, et a calculer, sur toute la zone d'au moins sa partie intermediaire le degre de correction de la pression necessaire pour ramener a zero les variations de la largeur de la plaque prevue apres avoir effectue la mesure, en se basant sur le coefficient d'expansion, la quantite de coupe de la largeur pour commander l'ouverture des cylindres dans les laminoirs verticaux respectifs apres un laminoir vertical a commander, le coefficient de largeur augmente standard, et la variation mesuree de la largeur de la plaque introduite par la quantite mesuree susmentionnee de maniere a commander l'ouverture des cylindres dans le laminoir vertical (E4) pour effectuer la correction de pression de la plaque a laminer dans les laminoirs verticaux apres le point mesure.
EP79901378A 1979-10-19 1981-05-04 Procede de controle de la largeur d'une plaque laminee Expired EP0037834B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP1979/000264 WO1981001114A1 (fr) 1979-10-19 1979-10-19 Procede de controle de la largeur d'une plaque laminee

Publications (3)

Publication Number Publication Date
EP0037834A1 true EP0037834A1 (fr) 1981-10-21
EP0037834A4 EP0037834A4 (fr) 1983-10-04
EP0037834B1 EP0037834B1 (fr) 1985-06-12

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EP79901378A Expired EP0037834B1 (fr) 1979-10-19 1981-05-04 Procede de controle de la largeur d'une plaque laminee

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EP (1) EP0037834B1 (fr)
DE (1) DE2953607A1 (fr)
GB (1) GB2072557B (fr)
WO (1) WO1981001114A1 (fr)

Cited By (1)

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Publication number Priority date Publication date Assignee Title
CN103252354A (zh) * 2013-05-17 2013-08-21 山西太钢不锈钢股份有限公司 一种热轧不锈钢带边部侧翻的控制方法

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Publication number Priority date Publication date Assignee Title
JPS60255209A (ja) * 1984-05-30 1985-12-16 Mitsubishi Heavy Ind Ltd 圧延機におけるエツジヤ開度制御方法
CN102716913B (zh) * 2012-06-26 2014-08-27 山西太钢不锈钢股份有限公司 铁素体热轧不锈钢楔形板坯宽度控制方法
CN103831304B (zh) * 2012-11-23 2016-03-02 攀钢集团攀枝花钢钒有限公司 一种热连轧中间坯目标宽度计算方法及系统
CN113909297B (zh) * 2021-10-12 2022-10-11 福建三宝特钢有限公司 超薄耐腐蚀热轧带钢轧制成型方法

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Publication number Priority date Publication date Assignee Title
JPS5226503B2 (fr) * 1973-05-16 1977-07-14
JPS5236543A (en) * 1975-09-19 1977-03-19 Hitachi Ltd Controll device for stentering roll mill
EP0506188B1 (fr) * 1991-03-29 1997-06-04 Koninklijke Philips Electronics N.V. Dispositif à couplage de charges
JPH05236543A (ja) * 1992-02-25 1993-09-10 Oki Electric Ind Co Ltd 宅内通信制御装置

Non-Patent Citations (1)

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Title
See references of WO8101114A1 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103252354A (zh) * 2013-05-17 2013-08-21 山西太钢不锈钢股份有限公司 一种热轧不锈钢带边部侧翻的控制方法
CN103252354B (zh) * 2013-05-17 2015-05-06 山西太钢不锈钢股份有限公司 一种热轧不锈钢带边部侧翻的控制方法

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DE2953607A1 (de) 1982-01-28
GB2072557B (en) 1983-02-09
WO1981001114A1 (fr) 1981-04-30
GB2072557A (en) 1981-10-07
EP0037834A4 (fr) 1983-10-04
EP0037834B1 (fr) 1985-06-12

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