WO1999024180A1 - Verfahren und einrichtung zum warmwalzen dünner stahlbänder - Google Patents
Verfahren und einrichtung zum warmwalzen dünner stahlbänder Download PDFInfo
- Publication number
- WO1999024180A1 WO1999024180A1 PCT/DE1998/003275 DE9803275W WO9924180A1 WO 1999024180 A1 WO1999024180 A1 WO 1999024180A1 DE 9803275 W DE9803275 W DE 9803275W WO 9924180 A1 WO9924180 A1 WO 9924180A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- steel strip
- rolling mill
- rolling
- hot rolling
- thickness
- Prior art date
Links
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
-
- 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
- B21B1/24—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 continuous or semi-continuous process
- B21B1/26—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 continuous or semi-continuous process by hot-rolling, e.g. Steckel hot mill
-
- 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
- B21B37/28—Control of flatness or profile during rolling of strip, sheets or plates
-
- 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
- B21B1/40—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 foils which present special problems, e.g. because of thinness
-
- 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
- B21B37/52—Tension control; Compression control by drive motor control
Definitions
- the invention relates to a method and a device for hot rolling thin steel strips with a rolling mill with at least one rolling stand.
- Hot and cold rolling mills are used for rolling thin steel strips, with the cold rolling mills being subordinate to the hot rolling mills.
- the object is achieved according to the invention by a method according to claim 1 or a hot rolling mill according to claim 14.
- the rolling train is set such that the steel strip runs out of the rolling stand with an outlet thickness that is less than 0.75 mm.
- a downstream cold rolling mill for rolling thin steel strips is not necessary.
- the invention also drastically reduces the operating costs of a rolling mill since the energy consumption associated with cold rolling is saved. Rolling operation is also simplified.
- the outlet thickness is less than 0.6 mm, which once again significantly increases the product range of the steel strip to be rolled with a rolling mill designed according to the invention. In a further advantageous embodiment of the invention, the outlet thickness is greater than 0.5 mm.
- the outlet thickness is greater than 0.4 mm.
- the outlet thickness is greater than 0.3 mm.
- the inlet thickness with which the steel strip m enters the rolling stand is greater than 1 mm.
- the rolling train has a plurality of rolling stands, the embedding thickness in the first rolling stand of a group of rolling stands greater than 1 mm and that the outlet thickness of the steel strip when it leaves the last rolling stand of this group is less than 0.75 mm , in particular less than 0.6 mm.
- the steel strip runs out of the roll stand at a temperature which is greater than 600 ° C. In this way, the possibility of setting a desired structure in the steel strip is ensured. This applies all the more to a further advantageous embodiment of the invention, according to which the steel strip runs out of the roll stand at a temperature which is greater than 800 ° C. or 1000 ° C.
- the rolling mill is preset before the rolling of the steel strip, the rolling mill being preset as a function of target values for profile and / or flatness for rolling stands of the rolling mill, the profile being particularly advantageous.
- a tension control for controlling the draw between the single ⁇ NEN Walzgerusten ALLOWABLE a speed limit and / or train limit value predefined.
- FIG. 1 shows a rolling mill with a hierarchically structured control concept
- FIG. 2 shows an exemplary embodiment of an optimizer for implementing the invention
- FIG. 3 shows a further exemplary embodiment of an optimizer for implementing the invention
- FIG 5 an optimization using genetic algorithms.
- a control system 3 is provided for controlling or regulating the rolling mill 1, which control values ST for the actuators of the rolling mill 1, e.g. m as a function of belt parameters BP or framework parameters GP.
- the control system 3 comprises a tension control and / or a presetting of the rolling mill 1.
- Input variables m the control system 3 include u.
- Process parameters VG which are the output variables of a pass schedule calculation 4.
- an optimizer 5 is provided, which determines output variables OA as a function of input variables OE, which are specified by the pass schedule calculation 4.
- the optimizer 5 shows a detailed illustration of the optimizer 5 with its input sizes OE and its output sizes OA.
- 5 input values PR *, PL * and DI * for the profile, the flatness and the thickness of the metal strip 2 are given as input sizes OE of the optimizer when they exit the rolling mill 1 see.
- 5 parameters MB of the steel strip are provided as the input size OE of the optimizer.
- These parameters MB of the steel strip can include the geometric dimensions as well as the chemical properties and structural properties of the steel strip at Emerton m the rolling mill 1.
- the combination of the target values PR * and DI * for profile and thickness, as well as the parameter MB of the steel strip represents a particularly advantageous embodiment of the input size OE of the optimizer 5.
- the optimizer determines 5 setpoints PR * and / or PL ⁇ for profile and / or flatness behind the individual stands of rolling mill 1. It can be provided that only setpoints PR * and / or PL for profile and / or flatness of the steel strip 2 can be determined behind the rolling stands of the rolling mill.
- the output variables OA of the optimizer 5 also include a speed limit value VT and / or a tension limit value ⁇ T for the tension in the steel strip 2 behind the lth mill stand.
- the speed limit value VT represents a minimum speed for the steel strip as it emerges from the last stand of the rolling mill 1.
- the tension limit value ⁇ Tj represents a permissible maximum value for the train in the steel strip 2 behind the lth mill stand.
- the optimizer 5 outputs the degree of reduction ⁇ for the individual 1 rolling stands.
- FIG. 3 shows a particularly advantageous alternative exemplary embodiment of an optimizer.
- additional values GF * are provided as additional input variables for the optimizer for the material or structural properties of the steel strip 2 running out of the rolling mill 1. These can include tensile strength and hardness of the steel strip 2.
- Structural properties and the thickness, as well as the parameter MB of the steel strip represent a particularly advantageous embodiment of the input size OE of the optimizer 6.
- 4 shows the interaction of an optimizer 5 with a tension control 10 and a presetting 11. In this case, an optimizer 5 is provided which, in a particularly advantageous alternative embodiment, also by an optimizer 6
- FIG 3 can be replaced.
- the control system 3 comprises the tension control 10 of the rolling mill 1 and the presetting 11 of the rolling mill 1.
- the tension control 10 can be designed as a minimum tension control or as a tension control with loop lifters.
- Input variables m the tension control include tension limit values ⁇ T for the train behind the lth mill stands and a speed limit value VT for the speed of the steel strip 2 emerging from the rolling mill 1.
- the current I tur is the drive for the lth mill stand input size m the tension control 10.
- the output variable is a current setpoint I for the current of the drive for the lth mill stand.
- a speed control with m the tension control 10 is implemented.
- the tension control management setpoints 10 speed and / or Mo outputs for a lower-level control In embodiment of the tension control 10 as a tension control with Schlm- genheber is further contemplated that an ⁇ Schlmgenheberwinkel a lift sling is behind a l-th Walzgerust A large gear ⁇ m, the tension control 10th
- Input variables m the default setting 11 are the solo profile PR behind the lth mill stand, the nominal flatness PL ⁇ behind the lth mill stand and the degrees of reduction ⁇ x on the l mill stands. Input variables m the default setting 11 are also the process parameters VG as well as belt parameters BP and cooking parameters GP.
- the band parameters BP and large parameters GP are advantageously used to adapt models that are used in the default setting 11.
- the band parameters BP include, for example, actual values for profile PR and flatness PL.
- the grating parameters include, for example, actual values for rolling force WK and
- Initial values of the presetting 11 are presetting values VO.
- the default values include VO For example, sizes such as bending rolls, setting the roll gap or shifting sliding rolls. Provision can be made to integrate the functional act of the presetting with the optimizer 5, as a result of which the output variables of such an optimizer are VO according to presetting values.
- values for the parameters to be optimized are arranged in so-called genes 40, which in turn are assigned to individuals 41 of a so-called population,
- initial population 34 a certain number of individuals form a so-called initial population 34
- the factor k So is true of analytical contexts be ⁇ go down in certain properties of the rolling stand and the rolling stock.
- rolling mill properties such as the work roll diameter D, the i-th roll stand or the load roll gap profile ⁇ x of the i-th roll stand are additional input variables OE of the options.
- the load roll gap profile Yl ⁇ is advantageously determined by means of preprocessing (see, for example, DE 196 42 918).
- the input variables OE are supplemented by variables that are necessary for the adaptation of the information processing based on neural networks. These can e.g. be the band parameters BP. Details on the design and adaptation of the models can e.g. DE 41 31 765, the article “Networks for Approximation and Learning", Proceedings of the IEEE, Vol. 78, No. 9, September 1990, and the article “Fast Learning in Networks of Locally-Tuned Processing Units", New Computation 1, pages 281 to 294, Massachussetts Institute of Technology, 1989.
- m particularly advantageous embodiment of the optimizer au ⁇ ßerdem ensures that the profile no values are inserted ⁇ is that the m EP 0591291 or m the article "Strip Profile Control with Flexible Edge Backup Rolls" VB Gmzburg, Iron and Steel Engmeer, July 1987, pages 23 to 34, violate the limits.
- the expected actual values for the material or structural properties of the running out of the rolling mill 1 steel strip of individuals 2 are determined, and with the nominal values GF * for the material or Geglageei ⁇ properties of the running out of the rolling mill 1 Stahlban ⁇ of 2 compared. * For the material or structural properties of the running out of the rolling mill 1 Steel strip 2 between individuals is probably a survival ⁇ assigned ness from the magnitude of the deviation between the actual values and the desired values GF.
- the individuals weighted with their survival probability are selected statistically into surviving individuals 42 and non-surviving individuals 31.
- an initial thickness of less than 0.75 mm, in particular an initial thickness of 0.6 mm it is particularly advantageous , a simultaneous
- Structural optimization includes, for example, the method described above or a method according to "An AI System for the Prediction of Flow Response in Hot Working" by JJM Too, K. Ide, P. Matheral, N. Pussegoda, EG Sherwood and T. Gomi , 37 th MWSP Conf. Prod., Vol. XXXIII, 1996, pages 785 to 790.
- the structure is determined using genetic algorithms or according to the article "An AI System for the Prediction of Flow Response in Hot Working" by JJM Too, K.
- a particular advantage is the complementary Bestim ⁇ mung a train-limit value and / or a speed limit.
- This feature is particularly advantageous as a flanking measure for the simultaneous optimization of structure and profile.
- it also enables an outlet thickness of less than 0.75 mm to be achieved when hot rolling, ie in particular above a temperature of 800 ° C.
- the invention in particular by hot rolling to an outlet thickness between 0.75 and 0.3 mm, results in a significant cost advantage compared to known rolling mills.
- the cost advantage is particularly significant with hot rolling below 0.6 mm.
- the invention is particularly advantageous in a rolling mill with at least four rolling stands. In this way, many degrees of freedom are available for optimization.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Metal Rolling (AREA)
- Metal Rolling (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP98962232A EP1030747B1 (de) | 1997-11-10 | 1998-11-09 | Verfahren und einrichtung zum warmwalzen dünner stahlbänder |
DE59810295T DE59810295D1 (de) | 1997-11-10 | 1998-11-09 | Verfahren und einrichtung zum warmwalzen dünner stahlbänder |
AT98962232T ATE254968T1 (de) | 1997-11-10 | 1998-11-09 | Verfahren und einrichtung zum warmwalzen dünner stahlbänder |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19749614 | 1997-11-10 | ||
DE19749614.8 | 1997-11-10 | ||
DE19850492A DE19850492A1 (de) | 1997-11-10 | 1998-11-02 | Verfahren und Einrichtung zum Warmwalzen dünner Stahlbänder |
DE19850492.6 | 1998-11-02 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1999024180A1 true WO1999024180A1 (de) | 1999-05-20 |
Family
ID=26041471
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE1998/003275 WO1999024180A1 (de) | 1997-11-10 | 1998-11-09 | Verfahren und einrichtung zum warmwalzen dünner stahlbänder |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1030747B1 (de) |
AT (1) | ATE254968T1 (de) |
WO (1) | WO1999024180A1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102018212074A1 (de) | 2018-07-19 | 2020-01-23 | Sms Group Gmbh | Verfahren zum Ermitteln von Stellgrößen für aktive Profil- und Planheitsstellglieder für ein Walzgerüst und von Profil- und Mittenplanheitswerten für warmgewalztes Metallband |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0306076A1 (de) * | 1987-09-01 | 1989-03-08 | Hoogovens Groep B.V. | Herstellung von umformbarem Stahlband |
WO1992000817A1 (en) * | 1990-07-06 | 1992-01-23 | The Broken Hill Proprietary Company Limited | Interstand tension control |
WO1993000181A1 (de) * | 1991-06-28 | 1993-01-07 | Siemens Aktiengesellschaft | Regelung bei dem herstellen von warmband mittels eines mehrgerüstigen warmbandwalzwerks |
DE19503363A1 (de) * | 1994-02-15 | 1995-09-07 | Siemens Ag | Einrichtung und Verfahren zum Regeln der Planheit und/oder Spannungsverteilung von gewalzten Metallbändern |
WO1997001401A1 (en) * | 1995-06-29 | 1997-01-16 | Hoogovens Staal B.V. | Plant for the manufacture of steel strip |
EP0771596A1 (de) * | 1995-11-03 | 1997-05-07 | Sms Schloemann-Siemag Aktiengesellschaft | Produktionsanlage zum kontinuierlichen- oder diskontinuierlichen Auswalzen von Warmband |
-
1998
- 1998-11-09 WO PCT/DE1998/003275 patent/WO1999024180A1/de active IP Right Grant
- 1998-11-09 AT AT98962232T patent/ATE254968T1/de not_active IP Right Cessation
- 1998-11-09 EP EP98962232A patent/EP1030747B1/de not_active Expired - Lifetime
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0306076A1 (de) * | 1987-09-01 | 1989-03-08 | Hoogovens Groep B.V. | Herstellung von umformbarem Stahlband |
WO1992000817A1 (en) * | 1990-07-06 | 1992-01-23 | The Broken Hill Proprietary Company Limited | Interstand tension control |
WO1993000181A1 (de) * | 1991-06-28 | 1993-01-07 | Siemens Aktiengesellschaft | Regelung bei dem herstellen von warmband mittels eines mehrgerüstigen warmbandwalzwerks |
DE19503363A1 (de) * | 1994-02-15 | 1995-09-07 | Siemens Ag | Einrichtung und Verfahren zum Regeln der Planheit und/oder Spannungsverteilung von gewalzten Metallbändern |
WO1997001401A1 (en) * | 1995-06-29 | 1997-01-16 | Hoogovens Staal B.V. | Plant for the manufacture of steel strip |
EP0771596A1 (de) * | 1995-11-03 | 1997-05-07 | Sms Schloemann-Siemag Aktiengesellschaft | Produktionsanlage zum kontinuierlichen- oder diskontinuierlichen Auswalzen von Warmband |
Non-Patent Citations (3)
Title |
---|
AUZINGER D ET AL: "NEUE ENTWICKLUNGEN BEI PROZESSMODELLEN FUER WERMBREITBANDSTRASSEN", STAHL UND EISEN, vol. 116, no. 7, 15 July 1996 (1996-07-15), pages 59 - 65, 131, XP000629440 * |
PICHLER R ET AL: "ON-LINE OPTIMISATION OF THE ROLLING PROCESS - A CASE OF NEURAL NETWORKS", STEEL TIMES - INCORPORATING IRON & STEEL, vol. 224, no. 9, September 1996 (1996-09-01), pages 310/311, XP000633287 * |
SCHOENBECK J ET AL: "STAND DER ISP-TECHNOLOGIE UND NEUE ENTWICKLUNGEN", STAHL UND EISEN, vol. 116, no. 11, 11 November 1996 (1996-11-11), pages 65 - 73, 158, XP000639880 * |
Also Published As
Publication number | Publication date |
---|---|
EP1030747B1 (de) | 2003-11-26 |
EP1030747A1 (de) | 2000-08-30 |
ATE254968T1 (de) | 2003-12-15 |
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