US3251207A - Automatic screwdown control - Google Patents

Automatic screwdown control Download PDF

Info

Publication number
US3251207A
US3251207A US263783A US26378363A US3251207A US 3251207 A US3251207 A US 3251207A US 263783 A US263783 A US 263783A US 26378363 A US26378363 A US 26378363A US 3251207 A US3251207 A US 3251207A
Authority
US
United States
Prior art keywords
circuits
strand
mill
error signals
signal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US263783A
Other languages
English (en)
Inventor
Norman A Wilson
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.)
Siemens Industry Inc
Original Assignee
Morgan Construction Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Morgan Construction Co filed Critical Morgan Construction Co
Priority to US263783A priority Critical patent/US3251207A/en
Priority to DE19641427959 priority patent/DE1427959A1/de
Priority to BE644838D priority patent/BE644838A/xx
Priority to FR966536A priority patent/FR1390542A/fr
Priority to GB9563/64A priority patent/GB1038056A/en
Application granted granted Critical
Publication of US3251207A publication Critical patent/US3251207A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • 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
    • B21B37/58—Roll-force control; Roll-gap control
    • B21B37/60—Roll-force control; Roll-gap control by control of a motor which drives an adjusting screw
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/16—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling wire rods, bars, merchant bars, rounds wire or material of like small cross-section
    • B21B1/18—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling wire rods, bars, merchant bars, rounds wire or material of like small cross-section in a continuous process
    • 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
    • B21B2013/006—Multiple strand rolling mills; Mill stands with multiple caliber rolls

Definitions

  • This invention relates to rolling mills and more particularly to an improved method of continuously gauging and controlling the cross-sectional dimensions of a plurality of rods or billets as they are rolled in a multi-strand rolling mill.
  • strand may be defined as a plurality of successively aligned roll passes in a rolling mill.
  • steel billets are introduced into charging furnaces, heated to 'the correct temperature, and then passed through successive rollers which reduce and reshape the billets to produce rods of the correct size and shape. At the present time, these steps or operating sequences are manually controlled.
  • the control of cross-sectional rod dimensions rolled in a rolling mill is accomplished by automatic actuation of power screwdown mechanisms located on selected roll stands through use of auxiliary control systems which make the mill operation substantially continuous and without the need of constant attention by operating personnel. Since the greatest latitude in making changes of cross-sectional dimensions prevails where the sections are the largest, it is more attractive economically to 'apply the control system of the invention to the roughing end of the mill.
  • the present invention provides integrated screwdown control for correction of the following types of off-gauge product variations:
  • the present system of control may also be described for illustrative purposes as being sub-divided into three control loops or sub-circuits. These sub-circuits each perform functions which are interrelated in the overall control system for continuous control of the rod mill.
  • automatic gauging devices such as infrared micrometers are mounted adjacent to the pass line in order to continuously scan across the direction of material flow and generate error signals proportional to and of the same polarity as any deviations from a given dimensional setting. These error signals are then selectively utilized by the above-mentioned sub-circuits to adjust power screwdown mechanisms which are mounted on selected roll stands.
  • FIG. 1 is a block diagram illustrating the complete Gauge Control System for stands 1 and 2 of a four strand rolling mill
  • FIG. 2 is a circuit diagram illustrating the means embodied in the instantaneous averaging circuits for instantaneously averaging error signals received from two infrared micrometers and for by-passing this step when only one of the two strands measured by the micrometers is filled;
  • FIG. 3 is a block diagram illustrating a sub-circuit comprising the Gauging Circuit
  • FIG. 4 is a block diagram illustrating a sub-circuit comprising the Front End Compensation Circuit.
  • FIG. 5 is a block diagram illustrating a sub-circuit comprising the Empty Pass Compensation Circuit.
  • FIG. 3 is a block diagram of the Gauging Circuit controlling stands 1 and 2 of a four strand mill, the circuit is divided into two parts along the center line of the mill, one part controlling the power screwdown mechanism of the drive side of the mill, the other the power screwdown mechanism of the work side.
  • Infrared micrometers 2, 4-, 6 and 8 continuously scan moving rods 9 to measure a selected cross-sectional dimension which is representative of the prevailing rod gauge.
  • the micrometers produce error signals proportional to the difference between the prevailing rod gauge and the desired rod gauge.
  • the error signals of infrared micrometers 2 and 4 or 6 and 8 on either side of the pass line are sampled for a predetermined interval by sampling circuits SC-l and SC-2 generally indicated at 10 or SC3 and SC-4 generally indicated at 12.
  • the sampled error signals are then transmitted to instantaneous averaging circuits 14 and 16 where they are averaged to obtain an instantaneous average between each pair of sampled error signals. This instantaneous average is then averaged over the predetermined sampling interval by time averaging circuits 18 and 20 to give a time average value.
  • FIG. 2 a circuit diagram, in order to illustrate the means of instantaneously averaging simultaneous signals from two infrared micrometers and for by-passing this step when only one of the two infrared micrometers is emitting a presence signal.
  • FIG. 2 a circuit diagram, in order to illustrate the means of instantaneously averaging simultaneous signals from two infrared micrometers and for by-passing this step when only one of the two infrared micrometers is emitting a presence signal.
  • the control components of the drive side in illustrating the above-mentioned procedure.
  • the drive and work sides of the mill are controlled through identical systems.
  • this circuit diagram will apply to both the Gauging Circuit illustrated in FIG. 3 and the Front End Compensation Circuit illustrated in FIG. 4.
  • each infrared micrometer 2 and 4 emits a presence signal and an error signal.
  • the presence signals indicate the absence or presence of a bar in the strand being measured, and the error signals are proportional to the difference between the prevailing rod gauge and the desired rod gauge.
  • presence signals are emitted which energize coils 22, closing switches 26 and 28. This in turn causes a voltage to be impressed across relay coil 30 resulting in the closing of switch 32.
  • Simultaneously error signals emitted by infrared micrometers 2 and 4 are sampled by sampling circuits SC1 and SC-Z and sampled error signals sent to summer-divider 34 where they are added and the sum multiplied by a fac tor of one-half /2). This operation results in an instantaneous averaging of the two sampled error signals. The instantaneous average is then averaged over the predetermined sampling interval by a time average circuit 18 to obtain a time average value which is then sent on to a proportioning network 54.
  • the error signals emitted by infrared micrometers 2 and 4 are fed through summer-divider 34 and closed switch 32 where they are instantaneously averaged before being sent on to a time averaging circuit 18.
  • the need to obtain an instantaneous average is no longer present, and the instantaneous averaging feature of the circuit is by-passed.
  • the average error signal is subsequently transmitted to a proportioning network 54 (see FIG. 3) on the drive side of the mill.
  • a similar proportioning network 56 is positioned on the work side of the mill to receive average error signals from an identical system of components located on the drive side.
  • the proportioning networks 54 and 56 proportion the averaged error signals in a predetermined manner between the respective drive and work sides of stands 1 and 2 and transmit partial correction signals to each pair of error storage circuits 58 and 60 or 62 and 64.
  • the error storage circuits have a stored voltage which is changed by the signal received from the proportioning networks.
  • the change being proportional to the magnitude and sense of the signal received, is subsequently transmitted to position control loops 66 and 68 or 70 and 72 for corresponding screwdown adjustments.
  • roll stands 1 and 2 are driven through gearing from the same motor, their respective roll speeds cannot be independently varied. Control of the screwdowns of only one stand would cause the slip and spread of stock in that stand to change. Changing either slip or spread would cause undesirable changes in the volume rate of flow of stock through a subsequent stand.
  • the position control loops Upon receiving a partial correction from the error storage circuits, the position control loops then cause the stand screwdown mechanisms located on either the drive side or the work side to move up or down an amount proportional to the magnitude of the partial correction signal.
  • the direction of movement for the power screwdown is governed by the polarity of the partial correction signal.
  • FIG. 4 A second source of off-gauge variations in the crosssectional dimensions of rod being rolled will now be described in connection with the Front End Compensation Circuit illustrated in FIG. 4.
  • a bar or billet enters a roll stand, it strikes the rolls, upsetting steady state rolling conditions and creating a shock which tends to spread the rolls apart. This in turn results in the rolling of a larger product than desired.
  • compensating roll adjustments are performed by the Front End Compensation Circuit, a circuit similar to the Gauging Circuit in that it has separate identical controls-for the drive and work sides of selected mill stands.
  • error signals which are proportional to the difference between the prevailing bar gauge and the desired bar gauge are relayed for a predetermined interval to instantaneous averaging circuits 74 and 76 by either initial condition correcting circuits ICC-1 and ICC2 indicated generally at 78 or by circuits ICC- 3 and ICC-4 at 80.
  • the averaging circuits 74 and 76 average the error signals from the two strands on their -respective side of the mill (work or drive side) to give an instantaneous average, which is then averaged over the predetermined interval by time averaging circircuits 82 or 84 to give a time average value.
  • the averaged error signal is then transmitted to proportioning networks 86 or 88 which proportion the averaged error signal in a predetermined manner and dispatch a partial error signal to initial condition circuits 90 and 92 or 94 and 96 of each stand, wherein the partial corrections are stored for future use.
  • this portion of the Front End Compensation Circuit is similar to the Gauging Circuit with the exception that the proportioned error signals are stored within the initial condition circuits 90 and 92 or 94 and 96. It should also be noted that the circuit diagram illustrated in FIG. 2 and previously described in relation to the Gauging Circuit will find similar application in the Front End Compensation Circuit. When only one strand on either side of the mill is present, the instan-.
  • circuits 74 or 76 will again be bypassed and the individual signal averaged by either time averaging circuit 8 2 or 84 to give a time average value.
  • a second delayed control signal on line t triggers error signals stored in either initial condition circuit 99 or 94 as the front end of the bar or billet enters stand 2.
  • the error signals pass through summing points 91, 93, 95 or 97 to activate the position control loops.
  • a third delayed control signal on line t is used to activate the initial condition correctingcircuits 78 or 80/ in order to sample the error signals of the infrared gauges as the front end of the bar or billet passes within view. If the preceding adjustments have been insufiicient, infrared gauges 2, 4, 6 and 8 will emit error signals that will again be averaged and sent on through the proportioning networks to be used in correcting the error signals previously stored in the initial condition circuits 90 and 92 or 94 and 96. In this manner, the Front End Compensation Circuit can perform compensating adjustments as abar or billet enters a roll stand, and in addition is capable of correcting adjustments previously performed in order to produce an ou-gauge product.
  • Predetermined corrections corresponding to the adjustments necessary to compensate for the prolonged absence of any strand are stored in empty pass compensation circuits 90, 92, 94 and 96 which also serve as initial conditioning circuits with other predetermined corrections set in for use in the Front End Compensation Circuit illustrated in FIG. 4.
  • a different correction will be set into the different empty pass compensation circuits 90, 92, 94 and 96 for each strand and the appropriate set of corrections for both sides of both stands will be selected upon the detection of the absence of any strand.
  • each empty pass compensation circuit has four inputs, one from each delay circuit 122, 124, 126 and 128, to permit a delayed signal from any particular strand to select the set of corrections previously established as required to be made to both sides of both stands for the absence of that particular strand.
  • Presence circuits 98, 190, 102 and 1M determine the absence or presence of a bar at a location following stand 1 and emit distinguishable signals when the rod is present and when the rod is absent.
  • a not-present signal is transmitted to timers 114, 116, 118 and 129, each having a timing cycle equal to the normal interval between rods or billets. The timing cycle is started by the appearance of a not-present signal and is stopped by a subsequent presence signal.
  • the timer transmits to delay circuits 122, 124, 126 and 128 a suitable signal for delayed control of the empty pass compensation circuits 9t), 92, 9dand 96.
  • These control signals after being sutiiciently delayed to allow the remainder of the last bar to clear stand 2, are sent to the Empty Pass Compensation Circuits 92 and 96 of stand 1 and to the Empty Pass Compensation Circuits 9i) and 94 of stand 2.
  • the predetermined stored corrections for that particular strand are triggered and sent through summing points 91, 93, 95 or 97 to the position control loops on both the work and drive sides of both stands.
  • the three sub-circuits comprise the full Gauge Cont-r01 System as illustrated in FIG. 1.
  • duplication of some components is avoided and the control functions are interrelated to be compatible to overall automatic operation. For example, only one position control loop for each power screwdown mechanism is necessary, since each loop is capable handling error signals from a plurality of sources.
  • each correction signal for the position control loops 66, 6 8, 70 and 72 from the various sub-circuits is applied independently or in combination if coincident in time by virtue of the adding circuits 91, 93, 95 and 97.
  • all control functions are continuously operative to sense the various control conditions and apply the appropriate signals in timed relation to the mill controls to achieve the improved operation previously described.
  • one sub-circuit may operate simultaneously with other sub-circuits without interference.
  • error signals would be transmitted by initial condition circuits and 92 or 94 and 96 and by the error storage circuits 58 and 69 or 62 and 64. It is also possible that some of these error signals would be positive and some negative.
  • summing points 91, 93, 95 or 97 are received by summing points 91, 93, 95 or 97 and added before being finally transmitted as one error signal to the position control loops, the possibility of interference between the various sub-circuits is eliminated.
  • the operating speed of the mill is no longer limited to such a great extent by the ability of operating personnel in adapting to increased mill speeds.
  • the remainder of the mill can be adjusted with greater ease if stock with uniform crosssectional dimensions is produced by stands 1 and 2.
  • a control system for automatically controlling the cross-sectional dimensions of a plurality of moving rods or billets by performing adjustments to the screw-down mechanisms of a selected roll stand in a multi-strand rolling mill, said system comprising gauge measuring devices positioned adjacent each said strands for continuously gauging the transverse dimensions of moving rods or billets as they leave said roll stand, said measuring devices emitting error signals proportional to the diiference between the prevailing bar gauge and the desired bar gauge, means for averaging the values of said error signals to obtain an averaged error signal for the Work and drive side of said stand, and means responsive to said averaged error signals for adjusting the screwdown mechanisms of said roll stand; means for eliminating errors caused by the entrance of said rods or billets in said roll stand, said means comprising a first set of presence sensing devices for detecting the presence of a rod in a strand and emitting presence signals, means responsive to said presence signals for sensing the entrance of said bar in said stand and performing compensating adjustments on said screwdown mechanisms, said adjustments governed by
  • gauge measuring devices are comprised of infrared micrometer gauges.
  • a control system for automatically controlling the cross-sectional dimensions of a plurality of moving rods or billets by performing adjustments to the screwdown mechanism of selected roll stands in a multistrand rolling mill, said system comprising gauge measuring devices positioned adjacent each said strand for continuously gauging the transverse dimensions of moving rods or billets as they leave said roll stands, said measuring devices emitting error signals proportional to the difference between the prevailing bar gauge and the desired bar gauge, means for averaging the values of said error signals to obtain an average error signal for the work and drive side of said roll stands, means for proportioning said average error signal between said roll stands, and means responsive to said proportioned error signal for adjusting the screwdown mechanisms of each of said roll stands; means for eliminating errors caused by the entrance of said rods or billets in said roll stands, said means comprising a first set of presence sensing devices for detecting the presence of a rod in a strand and emitting presence signals, means responsive to said presence signals for sensing the entrance of said rod in said rod stands in order to perform compensating
  • gauge measuring devices are comprised of infrared micrometer gauges.
  • means for controlling off-gauge variations in the cross-sectional dimensions of a plurality of rods or billets by automatically performing adjustments to the screwdown mechanisms of selected roll stands in a multi-strand rolling mill said means comprising infrared micrometer gauges positioned adjacent each said strands in order to continuously gauge the cross-sectional dimensions of moving rod contained therein, said gauges producing error signals proportional to the difference between the prevailing bar gauge and the desired bar gauge, means for sampling said error signals for a predetermined interval, means for subsequently averaging the sampled values of said error signals to obtain an averaged error signal for the work and drive side of said mill, means for proportioning said averaged error signals in a predetermined manner between said roll stands, and means responsive to said proportioned error signals for performing adjustments to said screwdown mechanisms.
  • means for eliminating errors in the cross-sectional dimensions of rods or billets caused by the entrance thereof in roll stands comprising a plurality of infrared micrometer gauges suitably mounted along the pas-s line adjacent each said strand, said gauges producing error signals proportional to the difference between the prevailing bar gauge and the desired bar gauge, means for sampling said error signals as the front end of said bars or billets pass under said infrared gauges, means for averaging said sampled error signals to obtain an averaged error signal for the work and the work and drive side of said mill, means for proportioning said averaged error signals in a predetermined manner between said roll stands, means for storing said proportioned error signals, means for detecting the presence of said bars or billets at a predetermined point along the pass line in order to emit presence signals, said presence signals being delayed and subsequently used to release said previously stored error signals as the bars or billets enter said roll stands, and means responsive to said released error signals for performing adjustments to the screwdown mechanism of said roll stands.
  • means for automatically eliminating errors in the cross-sectional dimensions of rods or billets caused by the prolonged absence from production of individual strands comprising; means for storing predetermined corrections calculated to perform roll adjustment necessary to compensate for said prolonged absences, detection means for emitting a signal when a rod or billet is absent from a strand for a period of time greater than the normal interval between rods or billets, said signal used to release said stored predeter- 0 mined corrections, and means responsive to said released corrections for performing said compensating adjustments to said roll stands.
  • means for automatically eliminating errors in the cross-sectional dimensions of rods or billet-s caused by the prolonged absence from production of individual strands comprising; means for storing predetermined combinations of correction signals calculated to perform roll adjustments necessary to compensate for said prolonged absences, means for detecting the absence of a rod in a strand for a period of time greater than the normal time interval between rods 0r billets and for emitting a presence signal, said presence signal used to select one of said stored predetermined References (Iited by the Examiner UNITED STATES PATENTS 2,933,956 4/1960 Snow 72l3 2,985,043 5/1961 Roberts 80'33 3,054,310 9/ 1962 Varner 8056 3,100,410 8/1963 Hulls et a1. 80--56 CHAR-LES W. LANHAM, Primary Examiner.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Metal Rolling (AREA)
  • Metal Rolling (AREA)
US263783A 1963-03-08 1963-03-08 Automatic screwdown control Expired - Lifetime US3251207A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US263783A US3251207A (en) 1963-03-08 1963-03-08 Automatic screwdown control
DE19641427959 DE1427959A1 (de) 1963-03-08 1964-03-04 Vorrichtung zur Dickenregelung bei mehradrigen Tandem-Walzwerken
BE644838D BE644838A (it) 1963-03-08 1964-03-06
FR966536A FR1390542A (fr) 1963-03-08 1964-03-06 Commande automatique des mouvements de serrage pour laminoirs
GB9563/64A GB1038056A (en) 1963-03-08 1964-03-06 Automatic screwdown control for rolling mills

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US263783A US3251207A (en) 1963-03-08 1963-03-08 Automatic screwdown control

Publications (1)

Publication Number Publication Date
US3251207A true US3251207A (en) 1966-05-17

Family

ID=23003212

Family Applications (1)

Application Number Title Priority Date Filing Date
US263783A Expired - Lifetime US3251207A (en) 1963-03-08 1963-03-08 Automatic screwdown control

Country Status (4)

Country Link
US (1) US3251207A (it)
BE (1) BE644838A (it)
DE (1) DE1427959A1 (it)
GB (1) GB1038056A (it)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3650135A (en) * 1968-06-14 1972-03-21 British Iron Steel Research Control for rolling means having successine rolling stands
US3726117A (en) * 1971-06-07 1973-04-10 Demag Ag Device and method for controlling the movement of a deformation roll
US3763678A (en) * 1972-06-30 1973-10-09 Gen Electric Apparatus for automatic control of product fill dimension

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0061539B1 (en) * 1981-03-26 1985-02-06 Mitsubishi Denki Kabushiki Kaisha Control method for multi-strand rolling mill

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2933956A (en) * 1958-01-30 1960-04-26 United States Steel Corp Automatic screwdown-control system for rod mill
US2985043A (en) * 1959-04-24 1961-05-23 United States Steel Corp System for controlling the screw settings of a reversing mill
US3054310A (en) * 1959-05-21 1962-09-18 Industrial Nucleonics Corp Control system
US3100410A (en) * 1959-06-27 1963-08-13 Westinghouse Canada Ltd Control systems

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2933956A (en) * 1958-01-30 1960-04-26 United States Steel Corp Automatic screwdown-control system for rod mill
US2985043A (en) * 1959-04-24 1961-05-23 United States Steel Corp System for controlling the screw settings of a reversing mill
US3054310A (en) * 1959-05-21 1962-09-18 Industrial Nucleonics Corp Control system
US3100410A (en) * 1959-06-27 1963-08-13 Westinghouse Canada Ltd Control systems

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3650135A (en) * 1968-06-14 1972-03-21 British Iron Steel Research Control for rolling means having successine rolling stands
US3726117A (en) * 1971-06-07 1973-04-10 Demag Ag Device and method for controlling the movement of a deformation roll
US3763678A (en) * 1972-06-30 1973-10-09 Gen Electric Apparatus for automatic control of product fill dimension

Also Published As

Publication number Publication date
DE1427959A1 (de) 1968-11-28
GB1038056A (en) 1966-08-03
BE644838A (it) 1964-07-01

Similar Documents

Publication Publication Date Title
US3604234A (en) Temperature control system for mill runout table
RU2078626C1 (ru) Способ регулирования процесса прокатки
US3457747A (en) Rolling mills
CN106413930A (zh) 轧制线的能量消耗量预测装置
US3251207A (en) Automatic screwdown control
US4087859A (en) Apparatus for measuring and controlling interstand tensions of continuous rolling mills
US3170355A (en) Maximum and minimum length control for a rolling mill shear
US4037087A (en) Rolling mill control method and apparatus having operator update of presets
US3762194A (en) Constant speed driven continuous rolling mill
US3328987A (en) Gage-control apparatus
US3496745A (en) Process for stretch-reducing tubes
JP3996976B2 (ja) 冷延反転スタンドの予設定
US3695075A (en) Correction system for continuous rolling mill
US3552170A (en) Method of treating hollow blooms in rolling mills
US3468145A (en) Billet mill wherein the rolling gap is controlled during the penultimate pass and fixed during the final pass
US3568637A (en) Tandem mill force feed forward adaptive system
US3213656A (en) Rolling mill motor speed control apparatus
US3600920A (en) Screwdown offset system and method for improved gauge control
JP2781860B2 (ja) 棒鋼の切断方法
US3913363A (en) Method and apparatus for shape control of metal products in continuous rolling mill
DE1427922A1 (de) Verfahren zum Streckreduzieren von Rohren
JP6935588B2 (ja) バーに対する引抜作用を調整する方法および対応する装置
RU2011210C1 (ru) Устройство управления исполнительным механизмом технологического агрегата
KR100878651B1 (ko) 단척소재의 코일온도 제어장치
US3208252A (en) Strip thickness control apparatus