EP0972581A2 - Procédé de laminage pour produits en forme de barres, notamment d'acier en barres ou de fils - Google Patents

Procédé de laminage pour produits en forme de barres, notamment d'acier en barres ou de fils Download PDF

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Publication number
EP0972581A2
EP0972581A2 EP99111050A EP99111050A EP0972581A2 EP 0972581 A2 EP0972581 A2 EP 0972581A2 EP 99111050 A EP99111050 A EP 99111050A EP 99111050 A EP99111050 A EP 99111050A EP 0972581 A2 EP0972581 A2 EP 0972581A2
Authority
EP
European Patent Office
Prior art keywords
rolling
roll
actual
stand
target
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.)
Granted
Application number
EP99111050A
Other languages
German (de)
English (en)
Other versions
EP0972581A3 (fr
EP0972581B1 (fr
Inventor
Otmar Dr. Palzer
Lutz Dr. Broll
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.)
SMS Siemag AG
Original Assignee
SMS Schloemann Siemag AG
SMS Demag AG
Schloemann Siemag 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 SMS Schloemann Siemag AG, SMS Demag AG, Schloemann Siemag AG filed Critical SMS Schloemann Siemag AG
Publication of EP0972581A2 publication Critical patent/EP0972581A2/fr
Publication of EP0972581A3 publication Critical patent/EP0972581A3/fr
Application granted granted Critical
Publication of EP0972581B1 publication Critical patent/EP0972581B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • 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
    • B21B37/64—Mill spring or roll spring compensation systems, e.g. control of prestressed mill stands
    • 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
    • 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
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/48—Tension control; Compression control

Definitions

  • the present invention relates to a rolling process for rod-shaped rolling stock, in particular steel bars or wire, in one Roll stand with two relative to each other in one direction of attack adjustable work rolls, which together a rolling caliber with a Form the actual roll gap so that the rolling stock comes out of the roll stand an actual height and an actual width with a rolling speed runs out, the rolling stock being rolled with an actual rolling force.
  • Such rolling processes are known. For example, you work on the Basis of a so-called monitor regulation. There are deviations detected in the height and width of the rod-shaped rolling stock and on the basis of an electromechanical or hydromechanical position corrected. Such systems have the disadvantage that both Monitor control itself as well as the employment act very slowly. In addition, there is the time delay due to the measurement behind the last regulated scaffolding. As a result, there is a response time of about 3 seconds, so that only faults with a low Frequency can be adjusted. Short-term disturbances, e.g. through so-called Skidmarks are not fixable, which may result Tolerance violations leads. The same problem arises in the event of malfunctions that occur at the beginning or end of the rolling stock Temperature and thickness fluctuations are caused.
  • the object of the present invention is a rolling method for rod-shaped rolling stock, which is considerable works faster and with it also short-term disruptions can be adjusted.
  • the rolling stock in front the rolling stand is subjected to tension control.
  • the train regulation can be designed in particular as a minimum draft control.
  • the train control can, for. B. can be realized in that the Rolled stock is subjected to loop control in front of the roll stand.
  • the difference between the actual roll gap and the target roll gap by the roll pitch correction value is partially compensated. Because thereby Cross-sectional fluctuations of the incoming rolling stock more evenly to the actual height and the actual width of the rolling stock being discharged distributed.
  • the part is preferably dependent on the rolling force and / or frequency.
  • Rod-shaped rolling stock is rolled in multi-stand rolling mills.
  • the invention therefore also relates in particular to a rolling process, in which a rod-shaped rolling stock, in particular bar steel or wire, first passes through a front and then a rear roll stand, with both the front and the rear roll stand with one the rolling process described above are operated and wherein the directions of adjustment of the work rolls of the roll stands vertically stand on each other.
  • the actual height and the actual width should preferably be at the same time be recorded.
  • the rolling process works even more precisely when the target roll gap are fed to the rolling stands with a delay, the waiting time by the quotient between one between the rear and the front rolling mill length and the rolling speed of the front roll stand is determined.
  • the control dynamics of the above rolling process is characterized by the between the front roll stand and the detection point for the actual height and the actual width of the rolling stock length is limited.
  • the control dynamics can therefore be improved by the fact that for the rear roll stand determines an additional target roll gap in this way is that the ratio of the relative errors in height and the Width remains as constant as possible, with the relative error in the Height by the difference between the actual height and the target height, divided by the target height, and the relative error in width by the Difference between actual width and target width divided by the target width, given is.
  • the control loop for determining the target roll gap is not closed.
  • the actual height, the target height, the actual width and the target width Preliminary settings for the roll stands determined. With these preconceptions A subsequent rolling stock can then be rolled as control values until the tip of the subsequent rolling stock reaches the detection point runs through and thus closes the control loop.
  • the roll stands can still use the pre-settings after closing the control loop be applied as input tax values.
  • the dynamics and the control accuracy of the roll stands is in given in full only if the roll settings of the Roll stands are within a specified range of employment move. It is therefore preferred to use the roller positions Roll stands for at least one upstream of the front roll stand Roll stand determined a target roll gap. This can ensure be that the roll positions of the two roll stands move within the cheapest employment range.
  • a rolling mill for rod-shaped rolling stock usually consists of a variety of roll stands. In Fig. 1 four of these roll stands are shown and provided with the reference numerals 1-4.
  • a rod-shaped rolling stock 5, according to the exemplary embodiment material 5 for wire, made of steel passes in a transport direction z firstly through the rolling stand 4, then the rolling stand 3, then the rolling stand 2 and finally the rolling stand 1. Behind the rolling stand 1 there is a detection point 6 Thickness measuring device 7 arranged. Between the rolling stand 1 and the detection point 6 and the roll stand 2 are Walzgutinn l 0, l 1 of the rolling stock. 5
  • Roll stands 1 and 3 are vertical stands. With them are theirs two work rolls 8 arranged vertically. The work rolls 8 are can thus be adjusted relative to one another in an adjustment direction x. The The direction of attack x is horizontal.
  • Roll stands 2 and 4 however, are horizontal scaffolds. With them are their two work rolls 8 adjustable in an adjustment direction y, which is vertical runs.
  • the directions of inclination x, y form together with the direction of transport z of the rolling stock 5 is a right-handed, right-angled coordinate system (x, y, z).
  • the rolling stock 5 runs into the roll stand 4 at a rolling speed v 4 , it having a dimension x 4 in the x direction and y 4 in the y direction before rolling in the roll stand 4.
  • the rolling stock 5 is rolled in the roll stand 4, the work rolls 8 of the roll stand 4 rotating at an operating speed n 4 . After rolling, the rolling stock 5 runs out of the roll stand 4 at a rolling speed v 3 . At this point in time, the rolling stock 5 has dimensions x 3 and y 3 in the x direction and y direction, respectively. With these values, it enters the mill stand 3.
  • the rolling stock between the roll stands 3 and 2 has a rolling speed v 2 and dimensions x 2 , y 2 in the x direction and y direction.
  • the rolling stock 5 between the roll stands 2 and 1 has a rolling speed v 1 and dimensions x 1 , y 1 .
  • the rolling stock then runs out of the roll stand 1 at a rolling speed v 0 and dimensions x 0 , y 0 .
  • the roll stands 2 and 4 are horizontal stands.
  • the dimension y 1 , y 3 of the rolling stock 5 running out in the y direction thus corresponds to the actual height.
  • the dimension x 1 , x 3 of the rolling stock 5 running out corresponds to the actual width.
  • the dimension x 0 , x 2 corresponds to the actual height behind the respective mill stand 1 or 3
  • the dimension y 0 , y 2 corresponds to the actual width.
  • the two work rolls 8 of the roll stands 1-4 each form a roll caliber with an actual roll gap s 1 to s 4 .
  • the actual roll gaps s 1 to s 4 can be set by a corresponding adjustment a 1 to a 4 of the respective roll stand 1-4 to a corresponding target roll gap s 1 * -s 4 *.
  • the work rolls 8 of the roll stands 1 and 2 can be adjusted relative to one another via hydraulic cylinder units 12.
  • the roll stands 3 and 4 can also be adjusted via hydraulic cylinder units.
  • the calculation of the target values s 1 *, s 2 * naturally takes into account the coupling of changes in length, height and width in the roll stands 1 and 2.
  • the target values s 1 *, s 2 * are determined in such a way that the difference between the actual values -Height h 0 and a target height h 0 * and the difference between the actual width b 0 and a target width b 0 * approach zero.
  • the rolling stock length l 1 is located between the roll stands 1 and 2.
  • the target roll gaps s 1 *, s 2 * must be fed to the roll stands 1, 2 with a delay, which is identical to is the running time t.
  • the target roll gap s 2 * is thus supplied to the roll stand 2 by the running time t sooner than the target roll gap s 1 * to the roll stand 1.
  • the rolling stock 5 is rolled in the roll stands 1-4 with actual rolling forces F 1 to F 4 . Due to the actual rolling forces F 1 to F 4, the actual roll gaps s 1 - s 4 of the roll stands 1-4 spring open. The actual roll gaps s 1 to s 4 thus result from the sum of a position a 4 to a 1 of the respective roll stand 1-4 and the respective stand suspension C 1 F 1 to C 4 F 4 .
  • C 1 to C 4 are the spring constants of the roll stands 1-4.
  • the actual rolling force F 1 is detected according to FIG. 2 and fed to a frequency filter 10.
  • the frequency filter 10 filters the rolling force F 1 and forwards the filtered value to a stand regulator 11.
  • the frame controller 11 determines in accordance with FIG. 3 on the basis of the filtered actual roll force F 1 a rolling force caused Walzspaltauffed réelle .DELTA.S 1.
  • the tension control is preferably designed as a minimum tension control. It can be implemented, for example, by means of a loop control. By means of the tension control it is achieved that the rolling stock 5 enters the rolling stand 1 with an essentially constant tension.
  • the maximum allowable train fluctuations are 5 MPa. Even better it is when the train fluctuations are limited to 2 MPa.
  • the actual roll gap s 1 can always be kept at its desired roll gap s 1 * when the roll gap control is fully reached.
  • the rolling force F 1 is also dependent, among other things, on the temperature and the cross section of the incoming rolling stock. If the stand controller 11 would always regulate the actual roll gap s 1 to its target roll gap s 1 *, the actual height h 0 would always be equal to the target height h 0 *. The actual width b 0 would fluctuate greatly. It is therefore generally more favorable if the difference between the actual roll gap s 1 and the target roll gap s 1 * is only partially compensated by the stand controller 11 by means of the roll pitch correction value ⁇ a 1 .
  • the part is usually between 20 and 90 percent of the full correction. In particular, it can be dependent on the rolling force and frequency. With such a partial correction, the rolling error is distributed more evenly over both dimensions h 0 , b 0 .
  • the rolling speed v 4 to v 0 increases continuously from the roll stand 4 to the roll stand 1.
  • the diameters of the work rolls 8 either remain the same or decrease from the roll stand 4 to the roll stand 1.
  • the work rolls 8 of the roll stand 1 rotate fastest. Periodic errors caused by any eccentricities of the work rolls 8 can therefore have a maximum of a frequency which corresponds to the speed n 1 of the roll stand 1.
  • the actual rolling force F 1 of the roll stand 1 is therefore recorded at least twice per revolution of the work rolls 8 of the roll stand 1.
  • the roll adjustment correction value ⁇ a 1 is frequency-filtered in accordance with the known frequencies corresponding to the speeds n 1 to n 4 in the stand controller 11. Only the frequency-filtered roll adjustment correction value ⁇ a 1 is then fed to the roll stand 1.
  • the regulation of the eccentricities is particularly effective when the roll adjustment correction value ⁇ a 1 is fed to the roll stand 1 as the sum of frequency components.
  • the frequency component corresponding to the operating speed n 1 of the roll stand 1 is fed to the roll stand 1 after a filter time T '. If necessary, this frequency component can be weighted with its own gain factor between 0.15 and 10.0 relative to the other frequency components.
  • the filter time T ' is selected such that the work rolls 8 of the roll stand 1 during the sum of the stand control time T and filter time T' between 0.4 and 0.55 revolutions, that is to say approximately half a revolution, plus any number of complete revolutions if necessary , return.
  • the roll stand 2 is regulated in the same way according to FIG. 4 like the rolling stand 1.
  • the rolling stock length l 1 is located between the roll stands 1 and 2.
  • the rolling stock length l 0 is located between the roll stand 1 and the detection point 6.
  • the dynamic range of the monitor control is therefore limited by the sum of l 1 : v 1 + l 0 : v 0 . Faster faults cannot be corrected using the method described above.
  • the maximum control dynamics of the monitor control would be given by l 0 : v 0 .
  • the control dynamics would be higher.
  • an additional target roll gap ⁇ s * is determined for the roll stand 1. This value is determined in such a way that the ratio of the relative errors ⁇ h, ⁇ b in the height and the width of the rolling stock 5 remains as constant as possible, in any case within a preselectable barrier.
  • the relative error ⁇ h in height is given by the difference between the actual height h 0 and the target height h 0 *, divided by the target height h 0 *.
  • the relative error ⁇ b in the width is given in an analogous manner by the difference between the actual width b 0 and the target width b 0 *, divided by the target width b 0 *.
  • the influence of the additional target roll gap ⁇ s 1 * on the actual height h 0 and the actual width b 0 must of course be taken into account when determining the target roll gaps s 1 *, s 2 * for the roll stands 1 and 2.
  • the method described above for setting the desired roll gaps s 1 *, s 2 * can of course only be carried out if the beginning of the rolling stock 5 has already reached or passed the detection point 6, that is to say the monitor control is closed.
  • the control loop is open before this point.
  • the roll stands 1, 2 must therefore be operated in controlled mode during this period. From measurements of the actual height h 0 , the actual width b 0 and the corresponding target values h 0 *, b 0 *, 9 target rolling gaps s 1 *, s 2 * can be determined using a rolling model in the rolling schedule computer which the desired actual values h 0 , b 0 can be expected.
  • the roll stands 1, 2 are then operated with these values for the target roll gaps s 1 *, s 2 * as long as the control loop of the monitor control is open.
  • the roll stands 1, 2 can only be optimally operated within a predetermined range of employment. In order to always ensure that the actual positions a 1 , a 2 of the roll stands 1, 2 move within this range, the actual positions a 1 , a 2 of the roll stands 1, 2 are transmitted to the rolling plan computer 9. As soon as the actual positions a 1 , a 2 reach the limits of their permissible ranges, the desired roll gaps s 3 *, s 4 * of the roll stands 3, 4 are changed such that the actual positions a 1, a 2 of the roll stands 1, 2 are shifted back into the middle of their permissible dynamic range. Thus, from the roll positions a 1 , a 2 of the roll stands 1, 2 for the upstream roll stands 3, 4, new desired roll gaps s 3 *, s 4 * are determined.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Metal Rolling (AREA)
  • Metal Rolling (AREA)
  • Ropes Or Cables (AREA)
  • Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
EP99111050A 1998-07-14 1999-06-14 Procédé de laminage pour produits en forme de barres, notamment d'acier en barres ou de fils Expired - Lifetime EP0972581B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19831481A DE19831481A1 (de) 1998-07-14 1998-07-14 Walzverfahren für stabförmiges Walzgut, insbesondere Stabstahl oder Draht
DE19831481 1998-07-14

Publications (3)

Publication Number Publication Date
EP0972581A2 true EP0972581A2 (fr) 2000-01-19
EP0972581A3 EP0972581A3 (fr) 2002-05-15
EP0972581B1 EP0972581B1 (fr) 2003-10-22

Family

ID=7873968

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99111050A Expired - Lifetime EP0972581B1 (fr) 1998-07-14 1999-06-14 Procédé de laminage pour produits en forme de barres, notamment d'acier en barres ou de fils

Country Status (8)

Country Link
US (1) US6112566A (fr)
EP (1) EP0972581B1 (fr)
JP (1) JP2000033408A (fr)
KR (1) KR20000011689A (fr)
AT (1) ATE252425T1 (fr)
BR (1) BR9902468A (fr)
DE (2) DE19831481A1 (fr)
ID (1) ID23065A (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1018376A3 (fr) * 1999-01-08 2002-12-18 SMS Demag AG Train de laminage pour laminer des produits en forme de barres, p.e. d'acier en barres ou de fils
EP1230992A3 (fr) * 2001-02-13 2004-10-13 SMS Demag AG Procédé pour faire fonctionner un train de laminoir et système de commande pour train de laminoir
CN103978044A (zh) * 2014-05-30 2014-08-13 中冶南方工程技术有限公司 轧机加减速阶段的辊缝补偿控制方法及其装置

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Publication number Priority date Publication date Assignee Title
SE517670C2 (sv) * 1998-07-10 2002-07-02 Abb Ab Förfarande och anordning för en kontinuerlig styrning av mellansparsspänningen i ett valsverk
DE10139513A1 (de) * 2001-08-10 2003-02-20 Sms Meer Gmbh Walzwerk zum Walzen von Halbzeug oder Stabmaterial
DE10202182B4 (de) * 2002-01-22 2004-02-12 Sms Meer Gmbh Arbeitsverfahren zum Walzen von Draht oder Feineisen
DE102005036184A1 (de) * 2004-12-07 2006-06-08 Sms Meer Gmbh Verfahren zur Regelung des Querschnitts von aus einer Drahtwalzstraße austretenden Drähten und Drahtwalzstraße
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
IT1400550B1 (it) * 2010-06-09 2013-06-11 Danieli Automation Spa Procedimento e dispositivo per il controllo dimensionale della sezione di un prodotto laminato.
CN101905245B (zh) * 2010-07-12 2012-02-08 武汉钢铁(集团)公司 超洁净低碳低硅钢盘条控轧工艺
CN103056171B (zh) * 2012-12-27 2015-03-25 鞍钢集团自动化公司 一种粗轧立辊短行程二次曲线控制方法
CN104249083B (zh) * 2013-06-26 2016-04-27 宝山钢铁股份有限公司 一种带钢头尾边缘降前馈控制方法
ES2732566T3 (es) * 2016-04-14 2019-11-25 Primetals Technologies Germany Gmbh Control robusto de tensión de banda
DE102016123069A1 (de) * 2016-11-30 2018-05-30 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Verfahren und Vorrichtung zur Herstellung eines Leitersegmentes

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US3744288A (en) * 1971-12-22 1973-07-10 Morgan Construction Co Tensiometer
US4557126A (en) * 1981-09-30 1985-12-10 Mitsubishi Denki Kabushiki Kaisha Control device for continuous rolling machine
JPS5933017A (ja) * 1982-08-17 1984-02-22 Toshiba Corp 圧延寸法制御装置
JPS5954412A (ja) * 1982-09-22 1984-03-29 Toshiba Corp 孔型圧延機の制御方法
US4909060A (en) * 1988-01-26 1990-03-20 United Engineering, Inc. Oil compression compensation system
DE3942452A1 (de) * 1989-12-22 1991-06-27 Schloemann Siemag Ag Ermittlung der federkennlinie eines vor- und fertiggeruestes
IT1280208B1 (it) * 1995-08-03 1998-01-05 Ceda Spa Costruzioni Elettrome Procedimento di controllo intergabbia del tiro del laminato e relativo dispositivo

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1018376A3 (fr) * 1999-01-08 2002-12-18 SMS Demag AG Train de laminage pour laminer des produits en forme de barres, p.e. d'acier en barres ou de fils
EP1230992A3 (fr) * 2001-02-13 2004-10-13 SMS Demag AG Procédé pour faire fonctionner un train de laminoir et système de commande pour train de laminoir
CN103978044A (zh) * 2014-05-30 2014-08-13 中冶南方工程技术有限公司 轧机加减速阶段的辊缝补偿控制方法及其装置

Also Published As

Publication number Publication date
US6112566A (en) 2000-09-05
JP2000033408A (ja) 2000-02-02
EP0972581A3 (fr) 2002-05-15
KR20000011689A (ko) 2000-02-25
ID23065A (id) 2000-01-20
ATE252425T1 (de) 2003-11-15
BR9902468A (pt) 2000-03-14
EP0972581B1 (fr) 2003-10-22
DE19831481A1 (de) 2000-01-20
DE59907417D1 (de) 2003-11-27

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