EP2581142A1 - Procédé de détermination d'une vitesse de produits à laminer - Google Patents

Procédé de détermination d'une vitesse de produits à laminer Download PDF

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Publication number
EP2581142A1
EP2581142A1 EP11185033.5A EP11185033A EP2581142A1 EP 2581142 A1 EP2581142 A1 EP 2581142A1 EP 11185033 A EP11185033 A EP 11185033A EP 2581142 A1 EP2581142 A1 EP 2581142A1
Authority
EP
European Patent Office
Prior art keywords
rolling
determined
speed
rolling stock
value
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.)
Withdrawn
Application number
EP11185033.5A
Other languages
German (de)
English (en)
Inventor
Hans-Joachim Felkl
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 AG
Original Assignee
Siemens AG
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 AG filed Critical Siemens AG
Priority to EP11185033.5A priority Critical patent/EP2581142A1/fr
Priority to CN201280050250.5A priority patent/CN103874551B/zh
Priority to PCT/EP2012/067333 priority patent/WO2013053549A1/fr
Priority to EP12756184.3A priority patent/EP2739411B1/fr
Publication of EP2581142A1 publication Critical patent/EP2581142A1/fr
Withdrawn legal-status Critical Current

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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
    • B21B37/46—Roll speed or drive motor control
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2275/00—Mill drive parameters
    • B21B2275/02—Speed
    • B21B2275/06—Product speed

Definitions

  • the invention relates to a method for determining an outlet-side rolling material speed in a rolling stand.
  • hot rolling e.g. a hot slab or a cast strand in several passes to plates or ribbons rolled out.
  • the rolling stock should generally be rolled to a target thickness specified in the pass schedule. This affects both reversing and continuous rolling mills.
  • the roll gap of the stand In order to obtain a desired target thickness on a roll stand, the roll gap of the stand must be suitably adjusted. This is done by a positioning system, which usually adjusts the upper set of rolls with respect to the pass line of the rolling mill.
  • the adjustment system is e.g. operated with a hydraulic cylinder or with an electromechanical screw or a combination of both.
  • the nominal value for the roll gap is initially specified from a stitch plan.
  • the pass schedule is calculated by a rolling mill model or selected from a list.
  • the nip for the current stitch is moved to the appropriate setpoint before the roughing of the rolling stock.
  • the puncture is the moment of impact of the rolling stock on the roll stand or the roll. It is known that after the tapping a Lastwalzspaltregler (Gaugemeter) calculates the current roll gap. This is done taking into account the position of the Anstellsystems, the forces occurring during the rolling process and the framework parameters. Based on its scaffolding model, the load-roll gap controller attempts to adjust the roll gap and thus the rolling stock thickness to the target value.
  • the known Walzgut quitesmess wornen be used, for example, to determine the inlet side Walzgut Norway before the first frame.
  • the overfeed s can be calculated here by a rolling model or be known from a list.
  • the outgoing rolling stock thickness is then further calculated on the basis of the above formula, but the modeled outlet-side rolling stock speed v 1 'is tracked by the actually measured outlet-side rolling stock speed v 1 .
  • the inlet-side rolling stock thickness h 0 is determined from a known initial value, for example a thickness measurement in the roughing train, or from a constant value in a slab. If there is no further thickness measurement in subsequent passes, or no further thickness change during reversing, the outgoing rolling stock thickness h 1 of the preceding pass is set for the inlet thickness h 0 of the next pass.
  • the correct assignment of a measured thickness or the outlet-side rolling stock thickness to the nip of the rolling mill intended for the next pass takes place in a known manner by a length-related storage of the rolling stock thickness, a synchronization e.g. on the head of the rolling stock and a tracking of the head to the nip.
  • the calculated estimated value for the outlet-side rolling stock thickness h 1 is regulated by the abovementioned mass flow controller known, for example, from cold rolling, to its target size, a target outlet thickness h 1s .
  • the mass flow controller acts on the positioning system of the respective rolling stand and gives, for example, correction values for the speed of inlet-side units. Such are, for example, a preceding rolling mill or a reel or roll which unwinds the rolling stock.
  • the problem with the above-mentioned method is determination of the outlet-side rolling stock speed v 1 .
  • a direct measurement on the rolling stock is possible.
  • Here is measured with a Walzgut beausmess issued, with which speed the rolling passes a fixed location or a control point of the plant.
  • laser or pulser are known on rollers with WalzgutAuth.
  • the known measuring methods usually provide only inadequate measurement results and are subject to interference.
  • the object of the invention is to specify an improved method for determining an outlet-side rolling material speed.
  • the correction value is determined using a measured value. The measured value is determined during the rolling process.
  • the invention is based on the finding that the roller speed measurement via pulse generators on the rolling drives particularly robust images dynamic components of the rolling process. Such proportions are, for example, accelerating the rolling train, speed changes by speed corrections of the regulations, or load reactions. All of this finds its way into the process according to the invention by using the roller speed.
  • a corresponding overfeed value can again be taken from a rolling model or from a list in a known manner.
  • the predefined overfeed in the form of the basic value is corrected or fine-tuned on the basis of measurements - ie in the form of the correction value - and more closely approximated to the actually existing overfeed s.
  • the lead is thus improved by adaptively adapting a standard value based on the measured values.
  • the rolling stock speed is detected via an adapted rolling stock speed model.
  • the adaptation takes place by constant adaptation of the correction value on the basis of the currently determined measured values.
  • the lead s is adapted by the measured values. So it takes place a detection of Walzgut Vietnamese only via an indirect Walzgut effetsapp or measurement.
  • the invention results in a robust method which, in contrast to an inadequate measured value for the outlet-side rolling material speed, determines and uses a sufficiently accurate actual rolling stock actual value as an estimated value.
  • the value zero is initially selected as correction value.
  • Correction values determined in the following are then stored cumulatively for subsequent rolling passes. Although a correspondingly determined correction value usually only acts on the following rolling process. Over time, however, this leads to a continuous statistical adaptation of the rolling model or of lists stored in lists for overfeed.
  • the measured value is determined on the rolling stock itself. However, this does not mean the o.g. direct speed measurement on the rolling stock. A different measured value is measured here, which is included in the calculation of the rolling stock speed only via the overfeed.
  • the time difference is determined as the measured value, in which a certain section of the rolling stock travels a certain distance in a rolling mill containing the rolling stand. This too is in contrast to the o.g. direct rolling speed measurement.
  • the speed is determined with which a certain portion of the rolling passes through a fixed investment location.
  • the section of the rolling stock is, for example, a certain fixed point or location on the rolling stock.
  • the head of the rolling stock is used as the section.
  • the head of the rolling material refers to the front end of the rolling stock as viewed in the direction of movement.
  • the distance between the stands of two rolling mills passed through the rolling stock is used as the travel distance and the time difference determined which passes through the rolling stock between the times of the puncturing of the two rolling mills.
  • two adjacent rolling mills become according to the above selected.
  • the integration of the roller speed on the first roll stand from the time of the tapping results in an imaginary length with which the rolling stock protrudes from the rolling stand on the outlet side.
  • the integration takes place up to the time at which the rolling stock punctures the next stand and gives an end length of 1.
  • an actual speed of the rolling stock is additionally determined by known measuring methods. Such an actual speed is thus one with which the rolling stock passes a certain plant location. Such an actual speed is actually measured and, together with the lead determined according to the invention, processed in a lead advance adaptation determining a controlled overfeed. In other words, the actual velocity and the lead corrected according to the invention enter the lead adaptation controller.
  • a certain weighting between the measured value and the advance value can be selected.
  • a rolling material speed measured after the rolling stand or between rolling stands is used by the advance adaptation controllers. The use is, however, to increase the robustness of the mass flow control only indirectly, namely together with the inventively determined overfeed in Voreilungsadaptionsregler.
  • the measured actual advance or advance rate determined by the advance or advance adaption controller is a direct indication of the modeling quality of the overfeed and can therefore be used ideally for adapting the process models.
  • FIG. 1 shows a section of a rolling mill 2, namely a rolling stand 4, in which a rolling stock 6 by means of a roller 8 to be rolled.
  • the rolling stock 6 is fed to the rolling stand 4 with an incoming rolling stock thickness h 0 and an incoming rolling stock speed v 0 .
  • the rolling stock 6 leaves the rolling stand 4 with an actual outlet-side rolling material speed v 1 and an expiring rolling stock thickness h 1 .
  • the roller 8 rotates in the rolling process with a roller speed v w .
  • the outlet-side rolling material velocity v 1 can not be measured reliably enough. Therefore, it is modeled as v 1 'from the product of the roll speed v w with a real existing lead s. This overfeed should also be adapted more closely by the sum of a basic value s G and a correction value s K.
  • the rolling mill 4 is associated with a mass flow controller 10, which regulates the setting of a variable roll gap 12 - indicated by a thickness arrow - in the roll stand 4.
  • the mass-flow controller 10 uses the modeled outlet-side rolling stock speed v 1 'for the roll gap control. According to the invention, this is formed from the roll speed v w and a modeled lead s' according to.
  • the modeled lead s' is the sum of a base value s G and a correction value s K.
  • the correction value s K is formed according to the invention from a measured value M determined during the rolling process.
  • the modeled lead s' tries to replicate the actual lead s as closely as possible.
  • the modeled outlet-side rolling material velocity v 1 ' likewise attempts to emulate the actual outlet-side rolling-material velocity v 1 as well as possible.
  • the basic value s G is used, which is taken, for example, from a list in the rolling mill or from a rolling model (not shown).
  • correction values s K can be formed, whereupon the modeled advance s' from the basic value s G approaches the actual advance s even better.
  • the rolling stock speed v 1 ' also approaches the real rolling stock speed v 1 .
  • the mass flow controller 10 is better able to adjust the nip 12 to regulate the mill stand 4.
  • the actual outgoing rolling stock thickness h 1 approaches a set value h 1s .
  • FIG. 2 shows a larger section of the rolling mill 2 and an example for the determination of a measured value M.
  • the measured value M is here on Walzgut 6 - or determined at a certain section 15 -.
  • the respective times of the punctures of the rolling stock 6 on the respective rolling stand 4 are the times t 1,2 .
  • the actual stand spacing d of the two rolling stands 4 as the distance of the piercing points of the rolling train.
  • Measured now is measured value M, a time difference T, in which section 15 covers a specific distance 17 in the rolling train with the two rolling stands 4.
  • a section 15 of the head 16 of the rolling stock 6 is selected, as the distance 17, the distance d framework.
  • the time difference T t 2 -t 1 and an integral of the roller speed v w from the time t1 to the time t2 are measured.
  • This provides an imaginary length 1, with a head 16 of the rolling stock 6 protrudes from the first stand 4.
  • the imaginary length 1 does not correspond to reality, since the rolling stock protrudes from the roll stand 4 by a length multiplied by the actual lead s.
  • a comparison of the length 1 with the actual stand spacing d yields an actual lead s and thus a correction value s K for the basic value s G.
  • FIG. 3 shows an alternative mass flow controller 10, which is supplied as a measured value M, an actually measured outlet-side rolling stock speed v 1M . This is determined on the rolling stock 6 by means of a Walzgut yorksmess Anlagen 18.
  • the mass flow controller 10 includes an advance adaptation controller 20 to which the actual roll speed v w , the measured stock speed v 1M, and the adjusted upward feedrate s' determined above are supplied. From these quantities, a controlled overrun s R is determined, which then passes through a limitation and plausibility check stage 22. This results in a further corrected overfeed s ', which is then used according to the procedure explained above in a track model 24 in order to produce the modeled outlet-side rolling stock speed v 1 '.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Metal Rolling (AREA)
EP11185033.5A 2011-10-13 2011-10-13 Procédé de détermination d'une vitesse de produits à laminer Withdrawn EP2581142A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP11185033.5A EP2581142A1 (fr) 2011-10-13 2011-10-13 Procédé de détermination d'une vitesse de produits à laminer
CN201280050250.5A CN103874551B (zh) 2011-10-13 2012-09-05 用于测定轧件速度的方法
PCT/EP2012/067333 WO2013053549A1 (fr) 2011-10-13 2012-09-05 Procédé de détermination de la vitesse d'un produit laminé
EP12756184.3A EP2739411B1 (fr) 2011-10-13 2012-09-05 Procédé de détermination d'une vitesse de produits à laminer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP11185033.5A EP2581142A1 (fr) 2011-10-13 2011-10-13 Procédé de détermination d'une vitesse de produits à laminer

Publications (1)

Publication Number Publication Date
EP2581142A1 true EP2581142A1 (fr) 2013-04-17

Family

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Family Applications (2)

Application Number Title Priority Date Filing Date
EP11185033.5A Withdrawn EP2581142A1 (fr) 2011-10-13 2011-10-13 Procédé de détermination d'une vitesse de produits à laminer
EP12756184.3A Active EP2739411B1 (fr) 2011-10-13 2012-09-05 Procédé de détermination d'une vitesse de produits à laminer

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP12756184.3A Active EP2739411B1 (fr) 2011-10-13 2012-09-05 Procédé de détermination d'une vitesse de produits à laminer

Country Status (3)

Country Link
EP (2) EP2581142A1 (fr)
CN (1) CN103874551B (fr)
WO (1) WO2013053549A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10254178A1 (de) * 2002-11-21 2004-06-03 Abb Patent Gmbh Verfahren zur Ermittlung von Zustandsgrößen eines Walzprozesses
EP2298461A1 (fr) * 2009-09-17 2011-03-23 Siemens Aktiengesellschaft Train de laminoir à froid doté d'une régulation du débit massique sur une cage de laminoir

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09239417A (ja) * 1996-03-11 1997-09-16 Toshiba Corp 熱間圧延機の制御装置
JP2000094022A (ja) * 1998-09-14 2000-04-04 Toshiba Corp 通板速度制御装置
JP3615996B2 (ja) * 2000-07-06 2005-02-02 東芝三菱電機産業システム株式会社 連続圧延機の板厚制御方法、パススケジュール算出方法及び板厚制御装置
JP2002028710A (ja) * 2000-07-12 2002-01-29 Sumitomo Metal Ind Ltd 連続圧延方法
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
DE102008007057A1 (de) * 2008-01-31 2009-08-13 Siemens Aktiengesellschaft Regelverfahren für eine Kaltwalzstraße mit vollständiger Massenflussregelung
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

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10254178A1 (de) * 2002-11-21 2004-06-03 Abb Patent Gmbh Verfahren zur Ermittlung von Zustandsgrößen eines Walzprozesses
EP2298461A1 (fr) * 2009-09-17 2011-03-23 Siemens Aktiengesellschaft Train de laminoir à froid doté d'une régulation du débit massique sur une cage de laminoir

Also Published As

Publication number Publication date
EP2739411A1 (fr) 2014-06-11
CN103874551A (zh) 2014-06-18
CN103874551B (zh) 2016-05-11
EP2739411B1 (fr) 2016-06-08
WO2013053549A1 (fr) 2013-04-18

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