WO2013110399A1 - Procédé de traitement de produit à laminer dans un laminoir à chaud - Google Patents

Procédé de traitement de produit à laminer dans un laminoir à chaud Download PDF

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Publication number
WO2013110399A1
WO2013110399A1 PCT/EP2012/075152 EP2012075152W WO2013110399A1 WO 2013110399 A1 WO2013110399 A1 WO 2013110399A1 EP 2012075152 W EP2012075152 W EP 2012075152W WO 2013110399 A1 WO2013110399 A1 WO 2013110399A1
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WO
WIPO (PCT)
Prior art keywords
rolling
speed
rolling stock
stand
stock
Prior art date
Application number
PCT/EP2012/075152
Other languages
German (de)
English (en)
Inventor
Hans-Joachim Felkl
Original Assignee
Siemens Aktiengesellschaft
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 Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Priority to EP12805668.6A priority Critical patent/EP2790846B1/fr
Priority to BR112014017948A priority patent/BR112014017948A8/pt
Priority to CN201280067802.3A priority patent/CN104066523B/zh
Publication of WO2013110399A1 publication Critical patent/WO2013110399A1/fr

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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
    • 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
    • B21B37/46—Roll speed or drive motor control

Definitions

  • the invention relates to a method for processing of rolling stock in a hot rolling mill
  • Rolling stock in a hot rolling mill with a rolling mill with at least two consecutive rolling stands is provided.
  • a rolling stock e.g. Steel or various metals in the form of so-called slabs or cast strands, heated in an oven to a temperature above the respective recrystallization temperature.
  • the hot slab then passes through a rolling mill with several rolling mills, in which it is rolled into ribbons or slabs in several passes. For each pass, the rolling stock is to be rolled to a specific target thickness.
  • the roll gaps on the roll stands must be suitably adjusted. This is done with the aid of Anstell systems, which usually adjust the upper set of rolls with respect to the pass line of the rolling mill.
  • the adjustment systems are e.g. operated with hydraulic cylinders or electromechanical screws or a combination of both.
  • the nominal values for the roll nip are usually specified from a pass schedule, which is calculated from a model of the rolling train or selected from a list.
  • a pass schedule which is calculated from a model of the rolling train or selected from a list.
  • the roll gaps are set to the corresponding set values.
  • a load roll gap controller calculates the current roll gap taking into account the position of the positioning system, the forces and the framework parameters. If the current gap and target value of the roll gap deviate from one another, the load roll gap controller regulates the roll gap and thus the rolling stock thickness on the basis of its framework model.
  • An improved way to control the roll gap is to use a mass flow controller.
  • the default setting of the roll gap is as above based on a stitch plan.
  • the rolling stock enters at a certain inlet-pickled rolling stock speed v and inlet-silted rolling stock thickness hi_i, and leaves the rolling stand with an outlet-silting rolling stock speed v ⁇ and effluent-silted stock thickness hi.
  • the mass flow law applies to every rolling mill:
  • the current outlet-side rolling stock thickness can be determined.
  • the calculated outflow-side rolling stock thickness is then regulated by the mass flow controller to its target thickness, a target outflow thickness hi, So ii.
  • the mass flow controller acts on the Anstellsystem of the respective rolling mill and thus replaced in principle the Lastwalzspaltspaltregler, which, however, additional borrowed can be maintained.
  • the inlet-side rolling stock thickness h 0 on the first rolling stand is determined from a known initial value, for example a thickness measurement in the roughing mill or from a constant value in a slab.
  • a renewed thickness measurement can be carried out or the outlet side rolling stock thickness of the preceding rolling stand can be used.
  • the measurement of the rolling stock speeds v can for example take place via a direct measurement on the rolling stock with a rolling stock speed measuring device. In this case, it is measured with which speed the rolling stock passes a fixed location or a checkpoint of the rolling train.
  • laser or pulser on rollers with WalzgutAuth known .
  • Another possibility would be to determine the speed over the time required for a certain rolling stock section, eg the head of the rolling stock, to travel a set distance, for example between two rolling stands.
  • the object of the invention is to provide an improved method for processing rolling stock in a hot rolling mill, in which the above-mentioned disadvantages are avoided.
  • a) outgoing side target thickness hi of the rolling stock for each rolling stand Wi are specified.
  • These setpoint values for the auslaufseifigen Walzgutdicken hi, So n are determined using a model for the machining process in the hot rolling mill model or taken from a stitch plan or a list.
  • setpoint values for the outlet-side rolling speeds i are ascertained in accordance with the mass flow law from the outlet-side target thicknesses hi This again takes place with the aid of a model or a pass plan.
  • a model value for the lead si is selected in step c).
  • the modeled lead s is intended to simulate the real overfeed as accurately as possible and is calculated by a rolling mill model or taken from a list.
  • setpoint values for the roll speeds v W i, So n are determined from the model value of the lead-in si and the target values of the outlet-side rolling stock speeds Vi, s o ii.
  • the roller speeds v W i are adjusted to the setpoint values for the roller speeds v Wl , s o ii. This results in the desired outfeed-side rolling speeds Vi, 3o n.
  • roller speed v Wl can be calculated from the outlet-side rolling material speed Vi and the associated overfeed s ⁇ as follows:
  • the rolling stock is to be rolled to a specific target thickness hi.
  • a target thickness hi is specified after the last rolling stand Wi, and based on a model, the remaining target thicknesses hi, namely those for the individual rolling stands Wi of the rolling train, are determined and thus likewise predetermined.
  • the target thickness hi is therefore to be understood as the thickness with which the rolling stock is to leave the rolling stand Wi. From these target thicknesses hi or so that they are adjusted according to the respective rolling stands, the associated outward-side rolling stock speeds v 1 are also modeled based on a model and set values for the outgoing-side rolling speeds Vi, B on are determined.
  • the basis for these model-based calculations is the mass flow law.
  • the associated lead s is determined by a model in such a way that it corresponds as closely as possible to the real lead.
  • the lead s is very low, experience has shown that it is in the single-digit percentage range, and therefore according to the above formula has only a minor effect on the ratio of expiring Walzgut Irish Vi and roller speed v Wl . It is therefore sufficient to set the lead s, at the beginning of the rolling process on the basis of a model to a value or to take a list.
  • roller speeds v Wl are then adjusted to the setpoint values for the roller speeds i, soii.
  • these setpoint values for the roller speeds v w i, So ii are actually set at the respective rolling stands Wi or rollers. This is done via pulse generators on the rolling drives.
  • roller speeds v H i via pulser on the rolling drives with high accuracy.
  • the roller speeds v H i can also be measured and regulated much more simply and accurately.
  • the outgoing side rolling speeds v therefore, also remain approximately constant, and the target thicknesses h 1, which are established according to the mass flow law, are therefore subject to less fluctuations.
  • This ensures that the rolling velocities v class are calculated using model-based calculated setpoints for rolling speeds VFLI, soi i, which in turn s, calculated over a likewise model-based calculated advance, adjusted, it is also not necessary to measure the Walzgutierien v ⁇ , which has sometimes shows as problematic.
  • a mass flow controller is used which hi the target thickness hi from the measured values for the inlet side rolling material speed v 0 (M , the inlet side rolling stock thickness h 0 , M and the roller speed v wi of the first rolling stand Wi using the lead Si adjusts.
  • a mass flow controller is used on each rolling stand, which adjusts the target thickness hi from the incoming silted material velocity ⁇ , - ⁇ , the inlet soapy stock thickness hi_i and the roll speed v «i of the rolling stand Wi using the lead Si.
  • These mass flow controllers act on the positioning system and the roller speed w i of the respective rolling stand Wi.
  • the roller speed v W i of the rolling stand Wi adjusted so that adjusts the target thickness hi + i according to the mass flow law in the rolling stand W 1+ i.
  • the roller speed v Wl of the previous rolling stand Wi is changed in order to restore the validity of the mass flow law on the rolling stand Wi + i. If a rolling stock section is too thick, the roller speed v Wl of the preceding rolling stand Wi is reduced, but if the rolling section is too thin, it is increased. Thus, thickness errors of the rolling stock can be pre-controlled and corrected quickly. This leads to an improvement in the thickness quality, in particular in the extended head region of the rolling stock.
  • the head of the rolled material refers to the front end of the rolling stock seen in the direction of movement.
  • the model value for the lead s is set constant. As already described above, a change in the lead s, has only a small influence on the roller speed v Wl . Therefore, in the simplest case it is sufficient to calculate the lead s ⁇ from the model or to extract it from a list and to maintain this value during the entire machining process.
  • the roll speeds v Wl are then set only at the beginning of the rolling process on the basis of the calculated in the model setpoint values for the roll speeds v Wl , So n.
  • the overfeed s, model-adapted during the entire processing for this, additional variables, such as measured values determined during the rolling process, are input into the model.
  • the modeled lead s is formed from a base value s G i and a correction value s Kl after si - s Gi + s Ki.
  • the correction value is determined here on the basis of a measured value during the rolling process.
  • the predetermined lead in the form of the basic value is determined by means of measurements - i. in the form of the correction value - corrected or fine-tuned and closer to the actual existing lead Si better. This allows the determination of a constantly updated
  • the lead is thus improved by adaptively adapting a standard value based on the measured values.
  • there is a corrected overfeed For example, a correction value is determined per rolling cycle in order to be used for subsequent, for example, similar rolling operations. Also in the next rolling process, a new correction value is then determined, which can then be used for the next but one rolling process.
  • a continuous optimization and tracking of the accuracy of the advance is achieved. This has a direct effect on the accuracy of the determined roller speed v H i and thus on the ausertonseifigen Walzgutieriieri vi and target thicknesses hi.
  • the overfeed s is constantly tracked on the basis of the measured value of the rolling stock speed v 1> M.
  • a rolling stock speed measured value v 1> M behind a rolling stand Wi is determined by known measuring methods.
  • This measured rolling stock speed v 1> M is measured together with the lead determined according to the invention Si processed in a further correction value s Kl and a further corrected overrun s, determining control device with a Voreilungsadaptionsregler.
  • the rolling speed measured value v 1, M 2 and the overfeed s corrected in accordance with the invention enter the control device.
  • a certain weighting between the measured value and the advance value can be selected. In other words, by the
  • Advance adaption controller although it uses a rolling material speed measured according to the rolling stand or between rolling stands. However, the use is made to increase the robustness of the mass flow control only indirectly, namely on the roller speed v Kl together with the inventively determined lead O s in the control device.
  • roller speed measurement via the pulse generators on the roller drives forms the dynamic components, such as, for example, Acceleration of the rolling train, speed changes due to speed corrections of the controls or load actions, robust.
  • the desired roller speed v W i, So n is set via the modeled and tracked over the control lead over factor so that adjusts the desired outlet side rolling material speed behind each rolling mill.
  • the rolling stock speed control achieves the high dynamics of the roller speed control.
  • the conversion of the rolling stock to the roll speed takes place via an overfeed, which is modeled and adapted by means of a reading-filtering control.
  • the measured actual advance or estimate determined by the advance or advance adaptation direction is a direct indication of the modeling quality of the overfeed and thus can be used ideally for the adaptation of the process models.
  • the adaptation of the modeled lead can also be simply limited in the controller: e.g. is in a known incorrect measurement of the rolling stock of the
  • Correction controller determined correction value for the lead s i frozen, i. the value of the override is retained and will not be further adjusted. This allows undisturbed further rolling in fault measurement of the rolling stock speed, in which the advance adaptation regulator is frozen, i. at the time of the incorrect measurement
  • Leading factor is not further corrected, but is constantly being used. This can be done, for example, until a valid measured value is measured again. The adjustment of the lead can then be continued to obtain even more accurate lead values.
  • the expansion of the rolling stock is taken into account in the determination of the rolling stock speeds vi and the roll speeds v Wl .
  • the ratio of run-in width Bi_i of the rolling stock to run-off width Bi of the rolling stock has an influence on the target thickness hi after the respective rolling stand.
  • the target thickness hi and the ratio of inlet-sissential width Bi_i of the rolling stock to the outlet-sissential width Bi of the rolling stock are proportional to one another:
  • a strip tension regulator is in each case arranged between two rolling stands Wi_i, Wi, which regulates the strip pulls i_i, i between two rolling stands via the setting of the roll gaps.
  • the bands Z i_ i, i are detected and regulated by means of the setting system of the rolling stand Wi in each case in the rolling direction. If the strip tension _i, i, for example, too large, the nip of the following rolling stand Wi is set closer to the force on the
  • Rolling stock acts to increase. If the strip tension zu ⁇ _ ⁇ , ⁇ , the roll gap is widened, so that a smaller force acts. Without such a band tension control there is an increased risk that the rolling stock breaks, too large a strip tension, or form loops in the rolling stock when the strip tension is too low.
  • the strip tension or the rolling stock can be detected by means of loop levers. These move in a position-controlled manner after the roll stand Wi, which follows in the rolling direction, to a desired position above the pass line.
  • the strip or rolling load is calculated by the force with which the rolling stock presses on the respective position-controlled loop lifter.
  • Known methods are load cells or indirect calculations on the restoring forces of the sling lifter control. From the time at which the ski lift gets WalzgutAuth, the Walzgutzugregelung is active on the Anstellsystem of rolling mill stand Wi in the rolling direction.
  • loop lifters for the detection of strip tension is that these are already present in the rolling mill and only position-controlled with a fixed angle, ie static and not dynamic, must be operated.
  • the complex loop lifter can be replaced by a simpler tension measuring roller, which detects the rolling stock, eg via integrated load cells.
  • the tension measuring roller is advantageously designed to be retractable: For threading, it lies in an end position below the pass line. After the mill stands in the rolling stock direction, it is moved far enough over the pass line to ensure a sufficient wrap angle for the rolling load measurement. In comparison to the loop lifter, the detection of the strip tension can be realized more cost-effectively with a tension measuring roller.
  • Fig. 1 shows a detail of a hot rolling mill with three successive rolling stands
  • Fig. 2 is a schematic representation of a control device
  • Fig. 1 shows a section of a hot rolling mill 2 with a rolling mill 3 with any number of successive roll stands Wi and rolls 4 for machining the rolled material 6.
  • Fig. 1 for example, three successive roll stands W-, represented W 2 and W 3, which two rollers 4 exhibit.
  • the rolling stock 6 here in the form of a slab, runs with an inlet-silty material thickness hi_i and an incoming silted material velocity ⁇ , -i, and leaves it with an outlet-silty material thickness hi and an outlet-silting material speed Vi.
  • the rolling stock 6 is the first roll stand W i with a ⁇ laufseifigen rolling stock thickness h 0 and v 0 einlaufseifigen rolling stock supplied. In each rolling stand Wi, the rolling stock 6 is to be rolled to a predetermined run-off target thickness hi, in the case of the first rolling stand Wi to a target thickness hi. Auslaufseifige Walzgut Alfaen Vi, s o ii are determined for each rolling mill according to the mass flow law from these effluent sifigen target thicknesses hi. According to the exemplary embodiment illustrated in FIG.
  • hi, h 2 and h 3 of the rolling stock for each rolling stand Wi are determined on the basis of a model predetermined and determined in a second step b) according to the Massenpoundge- set setpoints for the expiring Walzgut Supremeen i, So ii, v 2 , soii and ⁇ 3 , 5 ⁇ ⁇ .
  • a model value for the lead Si is selected.
  • this model value is taken from a list or selected on the basis of a rolling model and remains constant throughout the rolling process.
  • the same value s is selected for each rolling stand Wi, W 2 and W 3 as a model value for the lead s, and this value is kept constant during the entire rolling process.
  • Another possibility is model-based adaptation of the model value for the lead during the rolling process, the modeled lead Si being taken from a base value s G i, which is taken from a list or rolling model, for example, and a correction value s Kl based on a measured value is determined.
  • the predefined lead s G i is thereby corrected or fine-tuned on the basis of measurements - ie in the form of the correction value s Kl - and more closely approximated to the actually existing lead s.
  • the accuracy can be further increased by constantly tracking this modified lead s, during the processing of the rolling stock 6, on the basis of the measured value of the rolling stock speed v 1 (M )
  • the measured value for the rolling stock speed v 1) M is determined by means of a suitable Measuring device 18 determined.
  • the rollers 4 of a rolling stand Wi rotate at a roller speed v vl .
  • the roller speed v Wl is set via a rolling drive 8.
  • the rolls 4 of the rolling stands Wi, W 2 and W 3 are here adjusted to the setpoint values for the roll speeds v H i, g e n, v w2 , 3 o ii and v w3 , So ii.
  • the first rolling stand Wi is associated with a mass flow controller 10.
  • measured values are recorded for the entry-side rolling material speed v 0 , M and the inlet-pickled rolling stock thickness h 0 , M of the first rolling stand Wi. From these measured values and the roll speed v wi of the first roll stand W x , the mass flow controller 10 sets the target thickness hi using the lead s x .
  • a mass flow controller 10 controls the mass flow controller 10 via a AnstellSystem 12 of Rolling 4 and the first stand Wi, the setting of the variable roll gap.
  • a mass flow regulator 10 which is not shown here, can also be used on the rolling stands W 2 and W 3 .
  • a strip tension regulator 14 is further arranged, which controls the strip tension Zi_i, i between the two rolling stands Wi_i, Wi via the setting of the roll gaps.
  • a strip tension regulator 14 is arranged both between the rolling stands Wi and W 2 and between the rolling stands W 2 , W 3, which adjusts the strip tension Zi, 2 or Z 2f3 via the setting of the rolling gaps of the rolling stands W 2 and W, respectively 3 regulates.
  • the strip tension is detected in the illustrated embodiment via a loop lifter 16, which is operated position-controlled at a fixed angle.
  • a loop lifter 16 and a tension measuring roller - not shown - are used.
  • the strip tension ⁇ , - ⁇ is calculated by means of the respective force F with which the rolling stock 6 presses on the loop lifter 16.
  • the strip tension regulator 14 regulates the strip tension Zi_i, i via the setting system 12 of the respective rolling stand W in the rolling direction.
  • a rolling stock section 6 is detected during the rolling process, its tapping point in time ⁇ ⁇ + ⁇ in the rolling stand Wi + i determined and at time Ti + i, the roller speed v Wl of the rolling stand Wi is adjusted so that according to the mass flow law in the rolling stand Wi + i sets the target thickness hi + i.
  • Fig. 1 by way of example a Walzgutabites 6 is shown, which after the first rolling stand Wi a target thickness error Ah l , in this case a too thick Walzgutabites 6 ⁇ - shown here by a hatched area - has.
  • FIG. 2 shows a schematic representation of a control device 20 for controlling the rolling stock speed vi via the roller speed v W1 by means of which a continuous tracking of the modeled overfeed si takes place.
  • the overfeed is thus tracked by adaptive adaptation of the overfeed s, on the basis of further measured values, in the exemplary embodiment according to FIG. 2 on the basis of measured values of the rolling stock speed Vi, M.
  • This rolling stock speed value V ,, M is determined with a measuring device 18 behind a rolling stand Wi.
  • This control device 20 comprises a
  • Measuring device 18 an actual outlet side rolling material Vi, M measured.
  • This outlet-side rolling material speed v 1 (M) which is actually measured behind a rolling stand Wi, and the setpoint value for the outlet-side rolling speed i, So n, are supplied to the advance adaptation controller 22. From these variables, a correction value for the advance s Kl is determined.
  • this correction value for the advance s K i is supplied together with the basic value of the lead s Gl to a limitation and plausibility step 24.
  • the model-based adjusted lead s, by the lead adaptation controller 22 and the Limitation and plausibility stage 24 again fine-tuned, in contrast, under certain circumstances, again to produce a better adapted modeled lead s s.
  • a rolling stock speed measured according to the rolling stand Wi or between rolling stands is used by the regulating device 20.
  • it is used only indirectly, namely together with the lead s determined in accordance with the invention, in the control device 20.

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

Abstract

La présente invention concerne un procédé de traitement de produit à laminer (6) dans un laminoir à chaud (2) avec un train de laminage (3), comprenant au moins deux cages de laminoir (Wi) successives, chaque cage de laminoir (Wi) comprenant au moins un rouleau (4) entraîné par un entraînement de rouleau (8) ayant une vitesse de rouleau (vWi) et le produit à laminer (6) sortant de la cage de laminoir (Wx) avec une vitesse de produit à laminer côté sortie (vi) en relation avec la vitesse de rouleau (vWi) avec une avance (si), comportant les étapes suivantes : a) des épaisseurs cibles (hi) côté sortie du produit à laminer (6) sont spécifiées pour chaque cage de laminoir (Wx), b) des valeurs théoriques des vitesses de produit à laminer côté sortie (νi, Soll) sont déterminées, selon la loi sur le débit massique, à partir des épaisseurs cibles (hi) côté sortie, c) une valeur modèle est choisie pour l'avance (sj), d) des valeurs théoriques des vitesses de rouleau (vWi, Soll) sont déterminées à partir de la valeur modèle de l'avance (si) et des valeurs théoriques, e) les vitesses de rouleau (vWi) sont réglées sur les valeurs théoriques des vitesses de rouleau (vWi, Soll).
PCT/EP2012/075152 2012-01-24 2012-12-12 Procédé de traitement de produit à laminer dans un laminoir à chaud WO2013110399A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP12805668.6A EP2790846B1 (fr) 2012-01-24 2012-12-12 Procédé de traitement de produits laminés dans un laminoir
BR112014017948A BR112014017948A8 (pt) 2012-01-24 2012-12-12 Método para processamento de material de laminação em um laminador a quente
CN201280067802.3A CN104066523B (zh) 2012-01-24 2012-12-12 用于在热轧车间中加工轧件的方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP12152284.1A EP2620233A1 (fr) 2012-01-24 2012-01-24 Procédé de traitement de produits laminés dans un laminoir
EP12152284.1 2012-01-24

Publications (1)

Publication Number Publication Date
WO2013110399A1 true WO2013110399A1 (fr) 2013-08-01

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EP (2) EP2620233A1 (fr)
CN (1) CN104066523B (fr)
BR (1) BR112014017948A8 (fr)
WO (1) WO2013110399A1 (fr)

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CN105600554B (zh) * 2015-10-16 2017-10-17 东北大学 一种带材运行轨迹显示方法和装置
EP3208673B1 (fr) * 2016-02-22 2019-06-05 Primetals Technologies Austria GmbH Étalonnage en ligne d'une emprise de laminage d'une cage de laminoir
US10799924B2 (en) * 2017-08-01 2020-10-13 Sms Group Gmbh Mass flow regulation in roller devices
CN109298707A (zh) * 2018-11-07 2019-02-01 华侨大学 一种Smith预估监控AGC系统的控制方法
CN109433831A (zh) * 2018-12-14 2019-03-08 武汉利杨科技有限公司 一种减少轧机工作辊磨损的速度匹配系统
MX2023008387A (es) 2021-01-18 2023-07-31 Primetals Technologies Germany Gmbh Reduccion de cambios de espesor inducidos por la fuerza de traccion durante el laminado.

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WO2009095323A1 (fr) * 2008-01-31 2009-08-06 Siemens Aktiengesellschaft Procédé de régulation pour un train de laminoir à froid avec régulation intégrale du débit massique
EP2135690A1 (fr) * 2008-06-19 2009-12-23 Siemens Aktiengesellschaft Train de laminage continental doté d'intégrations et/ou de détachements de cages de laminoir en fonctionnement continu

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JPH0413407A (ja) * 1990-05-02 1992-01-17 Nkk Corp 仕上連続圧延機の尾端減速方法及びその装置
CN100493748C (zh) * 2006-09-20 2009-06-03 宝山钢铁股份有限公司 利用前滑自适应动态修正带钢厚度偏差的控制方法
DE102008011275A1 (de) * 2008-02-27 2009-09-10 Siemens Aktiengesellschaft Betriebsverfahren für eine mehrgerüstige Walzstraße mit Banddickenermittlung anhand der Kontinuitätsgleichung

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009095323A1 (fr) * 2008-01-31 2009-08-06 Siemens Aktiengesellschaft Procédé de régulation pour un train de laminoir à froid avec régulation intégrale du débit massique
EP2135690A1 (fr) * 2008-06-19 2009-12-23 Siemens Aktiengesellschaft Train de laminage continental doté d'intégrations et/ou de détachements de cages de laminoir en fonctionnement continu

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Publication number Publication date
CN104066523B (zh) 2016-08-31
EP2790846A1 (fr) 2014-10-22
BR112014017948A2 (fr) 2017-06-20
EP2620233A1 (fr) 2013-07-31
EP2790846B1 (fr) 2016-03-09
BR112014017948A8 (pt) 2017-07-11
CN104066523A (zh) 2014-09-24

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