EP2689864A1 - Procédé de traitement de produits laminés dans un laminoir - Google Patents

Procédé de traitement de produits laminés dans un laminoir Download PDF

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Publication number
EP2689864A1
EP2689864A1 EP12178196.7A EP12178196A EP2689864A1 EP 2689864 A1 EP2689864 A1 EP 2689864A1 EP 12178196 A EP12178196 A EP 12178196A EP 2689864 A1 EP2689864 A1 EP 2689864A1
Authority
EP
European Patent Office
Prior art keywords
drive
rolling
torque
load
current
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Withdrawn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
EP12178196.7A
Other languages
German (de)
English (en)
Inventor
Jochen Wermke
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=46845596&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP2689864(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Siemens AG filed Critical Siemens AG
Priority to EP12178196.7A priority Critical patent/EP2689864A1/fr
Priority to CN201380036366.8A priority patent/CN104428075B/zh
Priority to EP13729682.8A priority patent/EP2861360B1/fr
Priority to PCT/EP2013/062141 priority patent/WO2014016043A1/fr
Publication of EP2689864A1 publication Critical patent/EP2689864A1/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Withdrawn legal-status Critical Current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
    • B21B2275/00—Mill drive parameters
    • B21B2275/02—Speed
    • B21B2275/04—Roll speed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2275/00—Mill drive parameters
    • B21B2275/10—Motor power; motor current
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2275/00—Mill drive parameters
    • B21B2275/10—Motor power; motor current
    • B21B2275/12—Roll torque
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B35/00—Drives for metal-rolling mills, e.g. hydraulic drives
    • B21B35/02—Drives for metal-rolling mills, e.g. hydraulic drives for continuously-operating mills
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B35/00—Drives for metal-rolling mills, e.g. hydraulic drives
    • B21B35/02—Drives for metal-rolling mills, e.g. hydraulic drives for continuously-operating mills
    • B21B35/04—Drives for metal-rolling mills, e.g. hydraulic drives for continuously-operating mills each stand having its own motor or motors

Definitions

  • the invention relates to a method for processing rolling stock in a rolling mill with at least one rolling mill having a drive.
  • the rolling stock passes through a rolling train with one or more rolling stands.
  • the individual rolling stands each have a drive for rollers, with which the rolling stock is rolled into sheets or wires with a desired geometry, such as thickness or cross section.
  • the rollers must be controlled to a certain speed with the aid of the drives of the individual rolling stands. It is also important that during the entire operation of the rolling mill and the predetermined ratio of rotational speeds of the rollers of the individual rolling stands remains constant, otherwise tensile and compressive loads on the rolling occur, which in turn lead to an undesirable rolling result or even tearing or can cause a looping of the rolling stock.
  • each rolling stand with a separate drive for the rolls.
  • the individual drives each have a separate speed control, so that they can be controlled individually.
  • a major challenge of such a drive solution is the speed control of the rollers or drives of the individual rolling stands during the processing of rolling stock. This is especially true when different load moments act on the individual rolling stands, which for example when tapping, i. when striking the rolling stock on the rollers is the case. In such an action of a load torque on the drive, the rollers are braked, which thus leads to a collapse of the rotational speed of the rollers or of the drive to the relevant rolling stand.
  • the rollers of other rolling stands however, on the time of tapping no or a deviant, z. B. acts a smaller load torque, have an unchanged or only slightly changed speed.
  • a rolling mill has at least one rolling mill having a drive, in which a rolling moment pilot control of the drive by the torque-generating current supplied to the drive takes place in order to reduce a speed drop caused by a predictable load torque acting on the drive.
  • the occurrence of a foreseeable load torque is reduced by a rolling torque pilot control of the torque-generating current supplied to the drive.
  • suitable parameters such as roll gap geometry, position and characteristics of material sensors, distance of the individual rolling stands or roller and material speeds are used, with which it can be determined when the load torque and at what level it acts on the relevant drive.
  • the corresponding values including the amount of the foreseeable load torque can be determined, for example, by means of a model of the rolling mill.
  • the current supplied to the drive can then be selectively controlled in such a way that a reduction in the rotational speed of the drive associated with the occurrence of the load torque is reduced.
  • a controlled operation of the drives or the rollers of the individual rolling stands and thus the entire system is guaranteed. It is therefore no longer to individual tensile or compressive loads due to strong speed fluctuations of the individual drives or rollers of different rolling stands.
  • variations in the thickness are reduced and cracking of the rolling or looping largely avoided. This is especially true when the rolling mill has several rolling stands with separate drives and each drive is individually pre-controlled.
  • the foreseeable load torque is corrected by evaluating the actual values, in particular torque, speed, and derived actual accelerations. This results in a dynamic correction in the position of the tape head.
  • the height of the load torque can be corrected dynamically.
  • an evaluation is made by evaluating the deviation between the precontrol values for the foreseeable load torque and the actual load torque, an iterative optimization for correcting the Aufschaltzeitifiess and an iterative correction of the height of the predictable load torque.
  • the feedforward control is material-based. This means that material parameters such as hardness or influencing factors such as temperature and type of material are initially taken into account, how high the foreseeable load torque acts on the drive in question, so that depending on the drive, the drive is accordingly pre-controlled and thus the supplied current is changed.
  • the current is not leaps and bounds, but increasing, within a time window continuously, in particular increases ramped for pre-control of the drive.
  • the corresponding torque of the drive is changed only relatively slowly, so ramped.
  • the ramp can also be preset in a staircase.
  • the slope of the ramp for the torque is dimensioned such that the drive train remains in a defined and reproducible state at any time.
  • the overall system is better controlled and it shows a much improved timing of the individual drives and in particular the overall system.
  • a reproducibility of the behavior of the entire system is ensured.
  • the limitation of the increase of the current takes place with a corresponding ramp-shaped increase of the current setpoint value and can take place indirectly via a torque or also speed precontrol.
  • the steepness of the ramp depends on the dynamics of the power converter. In this case, type of converter, operating point and the design of the power converter, in particular the amount of current to be impressed, the speed and the voltage reserve play a role. With high reproducibility, the slope corresponds to an average value that can be achieved at the specified operating points. For complete reproducibility, the slope of the ramp or staircase must be smaller than the possible maximum slope that the power converter can provide over all specified operating points. The setpoint increase then does not exceed the achievable dynamics of the converter at the voltage limit at nominal motor voltage and maximum power. This eliminates deviations of the converter behavior in different operating points. This allows extremely accurate and predictable feedforward control at high speeds. The reproducible operation allows a very precise analysis of the inertia by interpolation, in addition a dynamic statement about the occurring load torque for the dynamic correction of the material position and the load height.
  • the ramp is designed such that the increase in torque of the drive achieved by the current increase causes a symmetrically acting deviation, so that the speed increase to the occurrence of the load and the delay after the occurrence of the load cancel until the complete build-up of the torque.
  • the torque input is thus realized halfway before and the other half after the load torque has occurred.
  • Pre-control is completed before the material enters the scaffold when the rise time between the occurrence of the load until complete torque application does not exceed the scaffold spacing divided by material velocity. In the case of a symmetrically acting deviation, this corresponds to twice the time required for the material to pass between two scaffolds.
  • FIG. 1 shows a section of a rolling train 2 with successive rolling stands 4 for processing a rolling stock 6.
  • eight consecutive rolling stands 4 are shown which pass through the rolling stock 6, eg a billet, which is rolled into wire.
  • Each mill stand 4 is a separate drive 8, comprising a motor 10 and a gear 12 associated with, wherein in the figure for clarity, only one drive 8 is indicated.
  • the drive is supplied by means of a power converter 14 with a control unit 16, a desired current I.
  • Each roll stand 4 further comprises at least one roller 13, which is driven by the respective drive 8 at a predetermined speed n, which is taken for example from a pass schedule.
  • the speed of rotation caused by a load torque M L acting on the drive 8 is reduced by the drive 8 with the aid of the control device 16 and the power converter 14 is precontrolled with respect to its supplied current I.
  • the load torque M L can be known or estimated, that is, a predictable size. For example, based on models of the rolling mill 2 as well as known sizes of the rolling stock 6 to be rolled, a corresponding expected value of the load moment M L acting on a drive 8 of a rolling stand 4 can be determined. This expectation value is determined over time so that the load moment M L for a particular drive 8 of a roll stand 4 is predicted over time. Depending on the foreseeable load torque M L , the rolling torque precontrol of the drive 8 is then effected by the torque-generating current I supplied to the drive such that a fall in the rotational speed of the drive 8 is compensated. For drives which, unlike the preferred solution, drive more than one rolling stand 4, the motor-related load torque M L determined over time reflects the sum of the individual motor-related rolling moments.
  • FIG. 2 is now exemplified for two rolling stands 4, each with a drive assigned to this 8, the time course of impinging on them load moments M L and these drives 8 supplied current I with the corresponding control variable, namely the current setpoint shown over time.
  • Curve 18 represents a sudden change of the load torque M L on the drive 8 of the first stand 4 at time t 2
  • curve 20 represents a jump of the load moment M L on the drive 8 of the second stand 4 at time t7.
  • the ramp for the current setpoint and for the current I is dimensioned such that the drive 8 remains in a stable state, which is also reproducible, that is, the increase of the current setpoint and the current I is so slow that the drive. 8 has a defined operating behavior.
  • the ramp of the current I is designed such that the torque increase of the drive 8 achieved by the increase in current is realized to one half before and the other half after the occurrence of the load torque M L. This means that the time span from t 1 to t 2 equals the period from t 3 to t 4 . When the time t 4 is reached, the amount of the load torque M L then corresponds to the amount of the torque M of the drive 8.
  • the current I according to curve 28 in the interval between t 6 and t 9 increases ramped such that the drive 8 remains in a stable state and the increase in torque achieved by the torque increase of the drive 8 to one half before and the other Half after the occurrence of the load torque M L is realized.
  • FIG. 3 now the speed curve of the two drives 8 is shown on the corresponding rolling stands 4.
  • the lower curve 30 shows the time course of the rotational speed n of the drive 8 of the first rolling stand 4.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Metal Rolling (AREA)
EP12178196.7A 2012-07-27 2012-07-27 Procédé de traitement de produits laminés dans un laminoir Withdrawn EP2689864A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP12178196.7A EP2689864A1 (fr) 2012-07-27 2012-07-27 Procédé de traitement de produits laminés dans un laminoir
CN201380036366.8A CN104428075B (zh) 2012-07-27 2013-06-12 处理在轧机中的轧件的方法
EP13729682.8A EP2861360B1 (fr) 2012-07-27 2013-06-12 Procédé de traitement de produits laminés dans un laminoir
PCT/EP2013/062141 WO2014016043A1 (fr) 2012-07-27 2013-06-12 Procédé de traitement de matière à laminer dans un laminoir

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP12178196.7A EP2689864A1 (fr) 2012-07-27 2012-07-27 Procédé de traitement de produits laminés dans un laminoir

Publications (1)

Publication Number Publication Date
EP2689864A1 true EP2689864A1 (fr) 2014-01-29

Family

ID=46845596

Family Applications (2)

Application Number Title Priority Date Filing Date
EP12178196.7A Withdrawn EP2689864A1 (fr) 2012-07-27 2012-07-27 Procédé de traitement de produits laminés dans un laminoir
EP13729682.8A Revoked EP2861360B1 (fr) 2012-07-27 2013-06-12 Procédé de traitement de produits laminés dans un laminoir

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP13729682.8A Revoked EP2861360B1 (fr) 2012-07-27 2013-06-12 Procédé de traitement de produits laminés dans un laminoir

Country Status (3)

Country Link
EP (2) EP2689864A1 (fr)
CN (1) CN104428075B (fr)
WO (1) WO2014016043A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107716564B (zh) * 2017-10-27 2019-04-23 宝钢特钢韶关有限公司 棒线材连轧轧件检测方法及检测装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4132825A1 (de) * 1990-10-02 1992-04-16 Toshiba Kawasaki Kk Verfahren und vorrichtung zum regeln der drehzahl eines elektromotors
DE19624717A1 (de) * 1995-07-31 1997-02-06 Gfm Gmbh Verfahren zum Regeln des Walzgutdurchlaufes durch eine kontinuierliche Walzstraße
DE19726586A1 (de) * 1997-06-23 1999-01-07 Siemens Ag Verfahren und Einrichtung zur Verringerung bzw. Kompensation von Drehzahleinbrüchen beim Einfädeln eines Walzgutes in ein Walzgerüst

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE757704C (de) 1937-10-10 1953-03-23 Siemens Schuckertwerke A G Einrichtung zur Drehzahlregelung der Antriebsmotoren einer kontinuierlichen Walzenstrasse
JPS6099416A (ja) 1983-11-04 1985-06-03 Mitsubishi Electric Corp 圧延機の速度制御装置
JPH04361813A (ja) 1991-06-07 1992-12-15 Kobe Steel Ltd 圧延ラインにおける圧延材噛込速度制御方法
JPH06218416A (ja) 1993-01-22 1994-08-09 Kawasaki Steel Corp 圧延機の速度制御方法及び装置
DE19633213A1 (de) * 1996-08-17 1998-02-19 Schloemann Siemag Ag Regelverfahren
DE19653182A1 (de) * 1996-12-20 1998-06-25 Siemens Ag Antriebseinrichtung für Walzgerüste
JP2005046898A (ja) 2003-07-31 2005-02-24 Jfe Steel Kk 圧延機の速度制御方法
JP2005254289A (ja) 2004-03-12 2005-09-22 Jfe Steel Kk 圧延機の速度制御方法
CN100441328C (zh) * 2006-01-25 2008-12-10 冶金自动化研究设计院 一种抑制轧机传动系统动态速降和扭振的控制系统
DE102009050710B4 (de) 2009-10-26 2016-08-04 Sms Group Gmbh Drahtwalzgerüst mit Einzelantrieb

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4132825A1 (de) * 1990-10-02 1992-04-16 Toshiba Kawasaki Kk Verfahren und vorrichtung zum regeln der drehzahl eines elektromotors
DE19624717A1 (de) * 1995-07-31 1997-02-06 Gfm Gmbh Verfahren zum Regeln des Walzgutdurchlaufes durch eine kontinuierliche Walzstraße
DE19726586A1 (de) * 1997-06-23 1999-01-07 Siemens Ag Verfahren und Einrichtung zur Verringerung bzw. Kompensation von Drehzahleinbrüchen beim Einfädeln eines Walzgutes in ein Walzgerüst

Also Published As

Publication number Publication date
CN104428075B (zh) 2016-07-27
WO2014016043A1 (fr) 2014-01-30
EP2861360A1 (fr) 2015-04-22
CN104428075A (zh) 2015-03-18
EP2861360B1 (fr) 2016-11-02

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