EP2301684A1 - Walzverfahren mit optimierter strain penetration - Google Patents

Walzverfahren mit optimierter strain penetration Download PDF

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Publication number
EP2301684A1
EP2301684A1 EP09171252A EP09171252A EP2301684A1 EP 2301684 A1 EP2301684 A1 EP 2301684A1 EP 09171252 A EP09171252 A EP 09171252A EP 09171252 A EP09171252 A EP 09171252A EP 2301684 A1 EP2301684 A1 EP 2301684A1
Authority
EP
European Patent Office
Prior art keywords
rolling
thickness
stock
passes
operating method
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Withdrawn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
EP09171252A
Other languages
German (de)
English (en)
French (fr)
Inventor
Birger Schmidt
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=42035960&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP2301684(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 EP09171252A priority Critical patent/EP2301684A1/de
Priority to RU2012116248/02A priority patent/RU2012116248A/ru
Priority to US13/498,187 priority patent/US9073107B2/en
Priority to CN201080042615.0A priority patent/CN102510778B/zh
Priority to EP10760296.3A priority patent/EP2480350B1/de
Priority to PCT/EP2010/063915 priority patent/WO2011036156A2/de
Priority to BR112012007429A priority patent/BR112012007429A8/pt
Priority to PL10760296T priority patent/PL2480350T3/pl
Publication of EP2301684A1 publication Critical patent/EP2301684A1/de
Withdrawn legal-status Critical Current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
    • B21B37/16—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
    • B21B1/22—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 plates, strips, bands or sheets of indefinite length
    • B21B1/30—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 plates, strips, bands or sheets of indefinite length in a non-continuous process
    • B21B1/32—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 plates, strips, bands or sheets of indefinite length in a non-continuous process in reversing single stand mills, e.g. with intermediate storage reels for accumulating work
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2201/00—Special rolling modes
    • B21B2201/06—Thermomechanical rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2261/00—Product parameters
    • B21B2261/02—Transverse dimensions
    • B21B2261/04—Thickness, gauge
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2265/00—Forming parameters
    • B21B2265/22—Pass schedule

Definitions

  • the present invention further relates to a computer program comprising machine code which is directly executable by a controller for a rolling mill for rolling flat and whose processing by the controller causes the controller to control the rolling mill according to such an operating method.
  • the present invention further relates to a control device for a rolling mill for a flat rolling stock, which is designed such that it controls the rolling mill in operation according to such an operating method.
  • the present invention relates to a rolling mill for a flat rolling controlled by such a control device.
  • thermomechanical rolling of heavy plate an attempt is made to set the finest possible fine-grained structure in order to optimize the mechanical properties of the end product.
  • the rule of thumb is that the finer the grain, the better the mechanical properties.
  • the principle of thermomechanical rolling is the coarse grain, which forms in the heating of the rolled plate to be rolled or rolling at high temperatures, to destroy by forming to the intermediate thickness and to prevent grain growth by lowering the temperature.
  • it is particularly important to completely strain-form the material in order to influence the structure in the material core as well. The most effective way to do this is by making as much as possible transformations per stitch. If it is not possible to work in all passes with maximum forming, preferably the stitches should be maximized before the cooling pauses and in the low temperature rolling phases.
  • the object of the present invention is to provide ways by which a good strain penetration can be achieved in a simple and reliable manner.
  • a window is created for the intermediate thickness. This makes it possible in most cases to perform all rolling passes before the rolling break with maximum forming. The necessary without this thickness window reduction of deformation can be omitted.
  • the thickness window (in the terminology of the present invention: the permissible thickness range) must not be confused with the unavoidable manufacturing tolerance. Because the manufacturing tolerance is a (relatively small) error that can not be avoided due to manufacturing reasons. For example, a material thickness of 70 mm should be set. However, despite all accuracy, the material thickness varies, for example, between 69.5 mm and 70.5 mm. By contrast, given the permissible thickness range, it is specified that, for example, the intermediate thickness should be within a range which is considerably greater than production-related tolerances. For example, it is determined that the intermediate thickness should be between 65 mm and 75 mm. The production-related tolerance is not taken into account here. Thus, the permissible thickness range is not an area within which the actual actual intermediate thickness of the rolling stock lies, but an allowable nominal thickness range within which the desired intermediate thickness of the rolling stock lies.
  • a target thickness is given, which should be approached if possible.
  • the target thickness in this case is within the permissible thickness range or, conversely, the permissible thickness range is defined around the target thickness.
  • the number of rolling passes is preferably determined such that a difference of the resulting intermediate thickness from the target thickness is minimized.
  • the intermediate thickness is preferably at the lower limit of the permissible thickness range. Because in this case is it is possible to reduce the utilization of the performance limits of the rolling mill as little as necessary.
  • the rolling passes not fully exploiting the performance limits of the rolling mill are the last of the rolling passes. It can thereby be achieved that, in the event of unforeseen disturbances of the rolling operation, a reserve (if usually only a small one) remains.
  • the rolling stock is rolled longitudinally from the initial thickness to the intermediate thickness and, during rolling, is at least partially transversely rolled from the intermediate thickness to the final thickness.
  • the permissible thickness range is determined by the corresponding permissible longitudinal or transverse region of the rolling stock, within which the corresponding dimension of the rolling stock after the rolls should be at the final thickness.
  • the rolling stock it is possible for the rolling stock to be rolled longitudinally from the initial thickness to the intermediate thickness as well as during rolling from the intermediate thickness to the final thickness.
  • the permissible thickness range is usually determined by the technological possibilities of the rolling mill to roll the rolling stock after the rolling break to the final thickness.
  • the rolling from the initial thickness to the intermediate thickness is usually carried out in a first temperature range. During the rolling break, the rolling stock cools down. The rolling from the intermediate thickness to the final thickness is subsequently carried out in at least a second, lower temperature range.
  • rolling takes place from the intermediate thickness to the final thickness in more than a second temperature range.
  • a further rolling break in which the rolling stock cools.
  • the rolling processes taking place in each case in one of the second temperature ranges can also be designed according to the invention.
  • the intermediate thickness of the respective preceding rolling operation corresponds in this case to the initial thickness of the respective rolling operation.
  • the object is further achieved by a computer program of the type mentioned, whose machine code is designed such that its processing by the control device causes the control device controls the rolling mill according to an operating method according to the invention.
  • the computer program can in particular be stored on a data carrier in machine-readable form (in particular in an exclusively machine-readable form, for example electronically).
  • control device for a rolling mill for a flat rolling stock which is designed such that it controls the rolling mill in operation according to an operating method according to the invention.
  • a rolling mill has at least one rolling stand 1. Shown in the 1 and 2 a single roll stand 1. However, it is possible that more than one roll stand 1 is present.
  • flat rolling stock serves to distinguish between profiled rolling stock, rod-shaped rolling stock and tubular rolling stock.
  • the rolling mill is designed as a reversing mill, in which the flat rolling material 2 is reversibly rolled.
  • This embodiment is the normal case of the present invention.
  • the rolling mill has a control device 3, by which it is controlled.
  • the control device 3 is designed such that, during operation, it controls the rolling mill in accordance with an operating method which will be explained in detail below.
  • the control device 3 can be programmed with a computer program 4 having machine code 5, which can be processed directly by the control device 3.
  • the processing of the machine code 5 by the control device 3 causes in this case that the control device 3 controls the rolling mill according to the operating method according to the invention.
  • the computer program 4 can be supplied to the control device 3 in various ways. In particular, it is possible that the computer program 4 is stored on a data carrier 6 in machine-readable form. As an example of one Disk 6 is in FIG. 1 a USB stick is shown. However, this embodiment is purely exemplary.
  • the computer program 4 can also be supplied to the control device 3 in a different way than via the data carrier 6. For example, it is possible to supply the computer program 4 to the control device 3 via a computer-computer connection, in particular a local area network or the world wide web.
  • the flat rolling stock 2 is to be rolled in the rolling mill from an initial thickness dA to a final thickness dE.
  • the control device 3 carries out a method which, in conjunction with FIG. 3 is explained in more detail.
  • FIG. 3 takes the controller 3 in a step S1 performance limits of the rolling mill.
  • the control device 3 for each rolling stand 1 of the rolling mill its maximum possible rolling force, its maximum possible rolling torque, its maximum possible return force, etc. take.
  • control device 3 counteracts the (actual) initial thickness dA, the (desired) final thickness dE and the technological boundary conditions of the rolling stock 2 and the rolling process.
  • the variables could also be determined otherwise.
  • the decisive factor is that they are known to the control device 3.
  • a step S3 the control device 3 determines a number of rolling passes, so that the rolling stock 2 is rolled from the initial thickness dA to an intermediate thickness dZ.
  • These rolling passes are referred to below as linguistic distinction from other rolling passes as basic stitches.
  • the choice of words is only for language distinction. A broad meaning content should not be associated with this choice of words.
  • control device 3 determines further stitches as part of the step S3, so that the rolling stock 2 is rolled from the intermediate thickness dZ to the final thickness dE.
  • These rolling passes are referred to below the linguistic distinction of the base stitches as additional stitches. This choice of words also serves only the linguistic distinction.
  • step S4 the control device 3 controls the rolling mill according to the rolling passes determined in step S3, that is to say in accordance with the base passes and possibly also the additional passes.
  • the base stitches are performed in a first temporal rolling section 7, the additional stitches in at least one further temporal rolling section 8.
  • Both the basic stitches and the additional stitches are in FIG. 4 indicated as vertical lines.
  • a rolling break 9 is an arbitrarily inserted rolling break 9.
  • the rolling break 9 is not merely the unavoidable break between two directly successive rolling passes, which is required, for example, for reversing the rolling stock 2. If a plurality of further rolling sections 8 are present, in each case a further rolling break 9 'is located between adjacent further rolling sections 8.
  • the rolling takes place in the first temporal rolling section 7 at a first temperature of the rolling stock 2, which is relatively high. From rolling section 7 to rolling section 8 (and possibly also from rolling section 8 to rolling section 8), the rolling stock 2 cools in the respective rolling recess 9, 9 '.
  • an allowable thickness range DB is determined, within which the intermediate thickness dZ should lie.
  • the thickness range DB is by an upper limit defines dZmax and a lower limit dZmin.
  • the thickness range DB can not be chosen arbitrarily, since the technological boundary conditions must be met.
  • the thickness range DB is not just a tolerance range that is unavoidable in the operation of the rolling mill. Rather, it is an area whose size is significantly greater than the accuracy with which the rolling stock 2 can be rolled to a certain thickness.
  • the difference between upper limit dZmax and lower limit dZmin, based on the lower limit dZmin can be between 5 percent and 25 percent. Examples of possible thickness ranges DB are in the FIGS. 6 and 7 shown.
  • a number of provisional rolling passes are determined, that is, preliminary base passes.
  • Each of the preliminary base passes fully exploits the rolling mill's performance limits.
  • the preliminary base stitches are thus set as "limit passes", in which the maximum possible deformation is effected.
  • the basic stitches are therefore set according to the motto "rolling stand, do what you can”. This may result in two different cases.
  • the number of final base stitches according to a step S14 is equal to the number of preliminary base stitches at which the allowable thickness range DB is undercut for the first time (as shown in FIG. 7 so five basic stitches).
  • the final base stitches can not correspond 1: 1 to the preliminary base stitches. Rather, it is necessary to fully exploit the performance limits of the rolling mill in at least one of the final base stitches. This is in FIG. 5 represented in a step S15.
  • the intermediate thickness dZ can correspond directly to the lower limit dZmin or, based on the total permissible thickness range DB, be at least in the lower third, preferably far below, for example in the lower 5 percent or the lower 10 percent of the permissible thickness range DB.
  • the number of base passes is not uniquely determined.
  • the intermediate thicknesses dZ achieved according to 4, 5 and 6 basic stitches are all within the permissible thickness range DB.
  • a target thickness dZ * that is within the permissible thickness range DB will be specified.
  • the number of base stitches is preferably determined such that a difference of the resulting intermediate thickness dZ from the target thickness dZ * is minimized.
  • five basic stitches would be executed. This is in FIG. 8 indicated by an arrow A.
  • the rolling stock 2 is usually rolled longitudinally, that is, it is not rotated between the base stitches. In the rolling break 9, however, it is possible that the rolling stock 2 as shown by FIG. 2 rotated by 90 ° and then rolled transversely. Alternatively, it is possible that the rolling stock 2 is not rotated in the rolling break 9, so that it is also rolled longitudinally during the additional stitches. Because of this, namely because both possibilities are given, the turning of the rolling stock 2 by 90 ° in FIG. 2 indicated only by dashed lines.
  • the permissible thickness range DB corresponds to FIG. 9 with a corresponding length range LB, within which a length 1 of the rolling stock 2 must lie after the rolling of the rolled stock 2 to the final thickness dE.
  • the control device 3 initially determines the permissible longitudinal region LB within the scope of determining the permissible thickness range DB and then calculates back to the permissible thickness region DB.
  • the permissible thickness range DB corresponds to a permissible transverse range QB in which a width b of the rolling stock 2 after rolling must be at the final thickness dE. In an analogous manner, it is therefore also possible to calculate back to the permissible thickness range DB on the basis of the permissible transverse range QB.
  • the rolling stock 2 is always rolled longitudinally, that is to say both during rolling from the initial thickness dA to the intermediate thickness dZ and during rolling from the intermediate thickness dZ to the final thickness dE, then, as shown in FIG. 10 be possible that due to technological possibilities of the rolling mill to roll the rolling stock 2 after the rolling break 9 to the final thickness dE, the intermediate thickness dZ within certain Borders must lie.
  • the allowable thickness range DB is determined by just these limits.
  • the present invention has many advantages. In particular, it is computationally easy to implement, works efficiently and is reliable. There is no danger of overloading the rolling mill or subsequently having to carry out, as it were, "small stitches" in which the rolling stock 2 is formed only to a slight extent. Also retrofitting existing rolling mills is readily possible.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Metal Rolling (AREA)
  • Metal Rolling (AREA)
EP09171252A 2009-09-24 2009-09-24 Walzverfahren mit optimierter strain penetration Withdrawn EP2301684A1 (de)

Priority Applications (8)

Application Number Priority Date Filing Date Title
EP09171252A EP2301684A1 (de) 2009-09-24 2009-09-24 Walzverfahren mit optimierter strain penetration
RU2012116248/02A RU2012116248A (ru) 2009-09-24 2010-09-21 Способ прокатки с оптимизированным полным формированием (strain penetration)
US13/498,187 US9073107B2 (en) 2009-09-24 2010-09-21 Rolling method having optimized strain penetration
CN201080042615.0A CN102510778B (zh) 2009-09-24 2010-09-21 具有优化的应变渗透的轧制方法
EP10760296.3A EP2480350B1 (de) 2009-09-24 2010-09-21 Walzverfahren mit optimierter strain penetration
PCT/EP2010/063915 WO2011036156A2 (de) 2009-09-24 2010-09-21 Walzverfahren mit optimierter strain penetration
BR112012007429A BR112012007429A8 (pt) 2009-09-24 2010-09-21 Método de laminação tendo penetração com tensão otimizada
PL10760296T PL2480350T3 (pl) 2009-09-24 2010-09-21 Sposób walcowania ze zoptymalizowanym strain penetration

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP09171252A EP2301684A1 (de) 2009-09-24 2009-09-24 Walzverfahren mit optimierter strain penetration

Publications (1)

Publication Number Publication Date
EP2301684A1 true EP2301684A1 (de) 2011-03-30

Family

ID=42035960

Family Applications (2)

Application Number Title Priority Date Filing Date
EP09171252A Withdrawn EP2301684A1 (de) 2009-09-24 2009-09-24 Walzverfahren mit optimierter strain penetration
EP10760296.3A Active EP2480350B1 (de) 2009-09-24 2010-09-21 Walzverfahren mit optimierter strain penetration

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP10760296.3A Active EP2480350B1 (de) 2009-09-24 2010-09-21 Walzverfahren mit optimierter strain penetration

Country Status (7)

Country Link
US (1) US9073107B2 (ru)
EP (2) EP2301684A1 (ru)
CN (1) CN102510778B (ru)
BR (1) BR112012007429A8 (ru)
PL (1) PL2480350T3 (ru)
RU (1) RU2012116248A (ru)
WO (1) WO2011036156A2 (ru)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2301684A1 (de) 2009-09-24 2011-03-30 Siemens Aktiengesellschaft Walzverfahren mit optimierter strain penetration
JP5257559B1 (ja) * 2012-10-03 2013-08-07 新日鐵住金株式会社 歪み演算方法及び圧延システム
CN103028603B (zh) * 2012-11-29 2014-11-26 一重集团大连设计研究院有限公司 一种带钢热连轧的可轧范围优化方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06262225A (ja) * 1993-03-15 1994-09-20 Furukawa Alum Co Ltd 可逆式圧延機の圧延スケジュール設定方法
JPH07232205A (ja) * 1994-02-25 1995-09-05 Nkk Corp 可逆式圧延機のパス・スケジュール決定方法
DE10018643A1 (de) * 1999-09-03 2001-04-05 Hitachi Ltd Reversierwalzverfahren und Reversierwalzsystem

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19531538A1 (de) 1995-08-25 1997-02-27 Schloemann Siemag Ag Warmbandproduktionsanlage für ferritisches Walzen und Verfahren zur Erzeugung von ferritischem Walzband
DE19540978A1 (de) 1995-11-03 1997-05-07 Schloemann Siemag Ag Produktionsanlage zum kontinuierlichen- oder diskontinuierlichen Auswalzen von Warmband
ES2224283T3 (es) * 1996-12-19 2005-03-01 Corus Staal Bv Procedimiento para producir una banda u hoja de acero.
EP2301684A1 (de) 2009-09-24 2011-03-30 Siemens Aktiengesellschaft Walzverfahren mit optimierter strain penetration

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06262225A (ja) * 1993-03-15 1994-09-20 Furukawa Alum Co Ltd 可逆式圧延機の圧延スケジュール設定方法
JPH07232205A (ja) * 1994-02-25 1995-09-05 Nkk Corp 可逆式圧延機のパス・スケジュール決定方法
DE10018643A1 (de) * 1999-09-03 2001-04-05 Hitachi Ltd Reversierwalzverfahren und Reversierwalzsystem

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
NEUMANN H H ET AL: "STICHPLANOPTIMIERUNG IN KALTWALZWERKEN", ELEKTRIE, VEB VERLAG TECHNIK. BERLIN, DD, vol. 47, no. 2, 1 January 1993 (1993-01-01), pages 66 - 68, XP000363803, ISSN: 0013-5399 *

Also Published As

Publication number Publication date
WO2011036156A2 (de) 2011-03-31
EP2480350A2 (de) 2012-08-01
US20120180540A1 (en) 2012-07-19
BR112012007429A8 (pt) 2017-12-05
EP2480350B1 (de) 2014-04-30
BR112012007429A2 (pt) 2016-12-13
PL2480350T3 (pl) 2014-09-30
RU2012116248A (ru) 2013-10-27
US9073107B2 (en) 2015-07-07
CN102510778B (zh) 2014-10-22
CN102510778A (zh) 2012-06-20
WO2011036156A3 (de) 2011-11-24

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