EP2094411A1 - Rolling method for a strip - Google Patents
Rolling method for a stripInfo
- Publication number
- EP2094411A1 EP2094411A1 EP07821561A EP07821561A EP2094411A1 EP 2094411 A1 EP2094411 A1 EP 2094411A1 EP 07821561 A EP07821561 A EP 07821561A EP 07821561 A EP07821561 A EP 07821561A EP 2094411 A1 EP2094411 A1 EP 2094411A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- rolling
- belt
- stand
- force
- strip
- 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
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
- B21B37/68—Camber or steering control for strip, sheets or plates, e.g. preventing meandering
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2269/00—Roll bending or shifting
- B21B2269/02—Roll bending; vertical bending of rolls
- B21B2269/04—Work roll bending
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2273/00—Path parameters
- B21B2273/12—End of product
- B21B2273/16—Tail or rear end
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2273/00—Path parameters
- B21B2273/18—Presence of product
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2273/00—Path parameters
- B21B2273/20—Track of product
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B31/00—Rolling stand structures; Mounting, adjusting, or interchanging rolls, roll mountings, or stand frames
- B21B31/16—Adjusting or positioning rolls
- B21B31/20—Adjusting or positioning rolls by moving rolls perpendicularly to roll axis
- B21B31/203—Balancing rolls
-
- 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
- B21B37/38—Control of flatness or profile during rolling of strip, sheets or plates using roll bending
-
- 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
Definitions
- the present invention relates to a rolling process for a belt comprising a belt head and a belt foot, wherein the belt, starting with the belt head, is rolled in a roll stand of a rolling device between an upper and a lower roll arrangement of the roll stand.
- the present invention further relates to a computer program comprising machine code, the execution of which by a control device for a rolling stand causes the rolling mill to be operated according to such a rolling method.
- the present invention relates to a data carrier on which such a computer program is stored.
- the present invention also relates to a control device for a rolling mill, in which such a computer program is stored, wherein the computer program is executable by the control device.
- the present invention relates to a rolling device for rolling a strip, which has at least one rolling stand with an upper and a lower roll arrangement and an adjusting device for applying a bending force to the roll arrangements, wherein the rolling stand is controlled by means of a control device of the type described above.
- any conventional rolling operation is carried out in the manner described above, rolling mill controls are software programmed, and any conventional rolling means is as described above.
- metal strip in particular of hot strip, the problem may arise in a rolling train that the band foot breaks laterally. So there may be the problem that the actually desired, central course of the tape and thus a trouble for the rolling operation of the rolling device is not ensured.
- the lateral breaking of the band in the horizontal direction can be caused by various physical dependencies.
- Examples of such dependencies are an unbalanced tension over the bandwidth, a wedge-shaped band cross-section, a skew of the work rolls, an asymmetrical work roll shape, etc.
- Roll stand is arranged.
- the nip of the upstream rolling mill can be opened in whole or in part.
- This procedure has the disadvantage that it has a direct influence on the rolling process as such. In particular, reducing the tension leads to a strong rolling of the strip in the rolling stand.
- the opening of the upstream rolling mill even has the consequence that the rolling process actually effected in this upstream rolling stand is completely or partially omitted.
- segmented tension measuring rollers are arranged in front of or behind the rolling stand, that is to say loop lifters, by means of which the tension over the belt width can be detected.
- the detected tensile stresses can serve as the basis of a control in this case, which counteracts the lateral breaking of the tape.
- segmented tension measuring rollers are very expensive.
- the effectiveness of this measure is empirically unfounded.
- a rolling method of the type mentioned above is known in which it is monitored whether the strip foot reaches a switching point located in front of the rolling mill, as seen in the rolling direction, and the roll arrangements from the time when the strip foot reaches the changeover point, (Switching time) are acted upon by means of an adjusting device with a bending force spreading the roller assemblies, which is as large as a Balancierkraft the upper roller assembly.
- the balancing force of the upper roller assembly is the weight that must be compensated to balance the upper roller assembly, thus preventing the upper roller assembly from sinking onto the lower roller assembly.
- the object of the present invention is a
- Rolling process and the objects corresponding thereto to create, by means of which a lateral breakage of the tape can be optimally counteracted without affecting the rolling process negative.
- the object is procedurally achieved in that the roller assembly is acted upon from the switching time with a roll force spreading the roll assembly, which is at least as large as a minimum force.
- the minimum force is at least as large as the Balancierkraft the upper roller assembly. It is according to the invention in Ab- dependence of parameters of the belt and / or operating parameters of the rolling device determined.
- the object is achieved programmatically by a computer program comprising machine code, the execution of which by a control device for a rolling stand causes the rolling stand to be operated according to such a rolling method.
- the object is further achieved by a data carrier on which such a computer program is stored in machine-readable form.
- control device for a rolling mill in which such a
- Computer program is stored, which is executable by the controller.
- the belt is clamped between the belt frame and a roll-up upstream retention element.
- the retaining element may in turn also be a rolling stand.
- the switching point is seen in the rolling direction in front of the rolling stand.
- the switching point can be seen in the rolling direction between the rolling stand and the retaining element or lie in front of the retaining element.
- the changeover point is fixed.
- the changeover point is determined as a function of parameters of the belt and / or operating parameters of the rolling device.
- the adjusting device generally has a drive-side and an operating-side partial adjustment device.
- a symmetrical control of the drive-side and the operating-side partial adjustment device takes place.
- a functional profile of parameters of the strip and / or operating parameters of the rolling device is detected transversely to the rolling direction and, depending on the detected functional profile, a distribution of the bending force on the drive side and the operator-side sub-device is determined. In this case, an asymmetrical distribution of the bending force on the two partial adjustment devices may result.
- Line II-II in Figure 1 and Figure 3 is a flowchart.
- a rolling device has at least one rolling stand 1.
- the roll stand 1 has an upper roll zenan angel 2 and a lower roller assembly 3. Between the roller assemblies 2, 3, a band 4 is rolled.
- the rolling stand 1 also has an adjusting device 5.
- the adjusting device 5 acts on work rolls of the roller assemblies 2, 3.
- the roller assemblies 2, 3 are acted upon by a bending force F.
- the adjusting device 5 spreads the roller assemblies 2, 3 or compresses them together.
- the rolling device furthermore has a control device 6.
- the control device 6 is used to control the rolling stand 1.
- a computer program 7, which is stored in a data carrier 8 of the control device 6, is fed to the control device 6.
- the data carrier 8 of the control device 6 corresponds to a data carrier in the sense of the present invention.
- the computer program 7 comprises machine code 9, which can be executed by the control device 6.
- the control device 6 executes the computer program 7, it operates the rolling stand 1 in accordance with a rolling method which is explained in more detail below in conjunction with FIG.
- the control device 6 first determines the value of a first logical variable START in a step S1.
- the first logical variable START assumes the value "TRUE” if and only if a tape head 10 of the tape 4 has reached the rolling stand 1.
- step S2 the control device 6 checks the value of the first logical variable START. Depending on the result of the check, the control device 6 returns to step S1 or proceeds to a step S3.
- step S3 the control device 6 controls the rolling stand 1 in such a way that the rolling stand 1 rolls the strip 4.
- the Control of the roll stand 1 by the control device 6 causes, in particular, that a roll gap s is set and the strip 4 is subjected to a rolling force FW. Furthermore, the control of the roll stand 1 by the control device 6 causes the setting device 5 to be acted upon by the bending force F.
- the value of the bending force F is determined by the control device 6 in accordance with the technological requirements of the rolling process. The value may be larger or smaller than a minimum force Fmin and also larger or smaller than the balancing force of the upper roller assembly 2. It can also be negative (ie, the roller assemblies 2, 3 are compressed).
- a step S4 the control device 6 determines the minimum force Fmin.
- the determination of the minimum force Fmin takes place as a function of parameters of the belt 4 and / or operating parameters of the rolling device.
- parameters of the belt 4 are its material properties, their dimensions and their temperature.
- operating parameters of the rolling device are a rolling speed v, a picking, a train Z (possibly as a function of the bandwidth b), etc.
- the minimum force Fmin is determined in step S4 to be at least as large as the balancing force of the upper Roller assembly 2 is.
- a step S5 the control device 6 determines the value of a second logical variable SHIFT.
- the second logical variable SHIFT assumes the value "TRUE" if and only if a tape foot 11 of the tape 4 has reached or has passed a changeover point 12.
- the band 4 is normally clamped between the roll stand 1 and an upstream retaining element 13 as viewed in the rolling direction x.
- the retaining element 13 may in particular itself be a rolling stand.
- the switching point 12 can - as seen again in FIG 1 - seen in the rolling direction x between the roll stand 1 and the retaining element 13.
- the switching point 12 seen in the rolling direction x is located in front of the retaining element 13.
- a possible changeover point 12 is shown in dashed lines for each of these two cases in FIG.
- step S6 the control device 6 checks the value of the second logical variable SHIFT. Depending on the result of the check, the control device 6 returns to step S3 or to step S7.
- step S7 the control device 6 checks whether the bending force F determined in step S3 is greater than the minimum force Fmin. If this is not the case, the control device 6 raises the bending force F to the minimum force Fmin in a step S8. Otherwise, no action needs to be taken. In this case, the bending force F can be maintained.
- the control device 6 determines the value of a third logical variable ENDE.
- the third logical variable ENDE assumes the value "TRUE" if and only if the belt foot 11 reaches the rolling stand 1.
- step S10 the control device 6 checks the value of the third logical variable ENDE. Depending on the result of the check, the control device 6 proceeds to a step Sil or terminates the further process sequence.
- step Sil substantially corresponds to the step S3.
- step S3 the bending force F is no longer determined in step S, but only retained. From step S, the controller 6 returns to step S9.
- the bending force F is raised to the minimum force Fmin only when the bending force F is smaller than the minimum force Fmin. Otherwise, the bending force F is maintained.
- the procedure of FIG. 3 is preferable.
- step S12 is inserted between the steps S3 and S4.
- the control device 6 determines the changeover point 12.
- the determination of the changeover point 12 takes place in the context of step S12 as a function of parameters of the belt 4 and / or operating parameters of the rolling device.
- the parameters of the belt 4 and the operating parameters of the rolling means may be the same as those mentioned above in connection with the determination of the minimum force Fmin.
- Step S12 implements the first variant of the procedure of FIG. 3.
- step S12 precedes step S4.
- it could also be arranged downstream of step S4.
- step S9 is preceded by a step S13.
- the control device 6 detects a functional profile of parameters of the belt 4 and / or operating parameters of the rolling device transverse to the rolling direction x.
- a functional profile of parameters of the belt 4 and / or operating parameters of the rolling device transverse to the rolling direction x As a function of the detected functional profile-in particular as a function of the tensile stress Z and the rolling force FW-the control device 6 determines a differential force ⁇ F in the context of step S14.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Metal Rolling (AREA)
- Metal Rolling (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL07821561T PL2094411T3 (en) | 2006-12-18 | 2007-10-19 | Rolling method for a strip |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102006059709A DE102006059709A1 (en) | 2006-12-18 | 2006-12-18 | Rolling process for a strip |
PCT/EP2007/061197 WO2008074539A1 (en) | 2006-12-18 | 2007-10-19 | Rolling method for a strip |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2094411A1 true EP2094411A1 (en) | 2009-09-02 |
EP2094411B1 EP2094411B1 (en) | 2011-07-20 |
Family
ID=38777692
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07821561A Not-in-force EP2094411B1 (en) | 2006-12-18 | 2007-10-19 | Rolling method for a strip |
Country Status (11)
Country | Link |
---|---|
US (1) | US8459074B2 (en) |
EP (1) | EP2094411B1 (en) |
CN (1) | CN101563174B (en) |
AT (1) | ATE516898T1 (en) |
BR (1) | BRPI0720430A8 (en) |
CA (1) | CA2672789A1 (en) |
DE (1) | DE102006059709A1 (en) |
PL (1) | PL2094411T3 (en) |
RU (1) | RU2469808C2 (en) |
UA (1) | UA97261C2 (en) |
WO (1) | WO2008074539A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107671126A (en) * | 2017-09-08 | 2018-02-09 | 张家港浦项不锈钢有限公司 | The horizontal control method of the upper and lower working roll of steekle mill |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008007247A1 (en) * | 2007-09-13 | 2009-03-19 | Siemens Aktiengesellschaft | Operating method for a rolling mill with curvature detection |
DE102009039501A1 (en) * | 2009-08-31 | 2011-03-03 | Sms Siemag Ag | Method for adjusting the rolls of a roll stand and roll stand |
DE102014215396A1 (en) | 2014-08-05 | 2016-02-11 | Primetals Technologies Germany Gmbh | Differential tension control with optimized controller design |
JP6904314B2 (en) * | 2018-07-17 | 2021-07-14 | 東芝三菱電機産業システム株式会社 | Wedge control device for hot rolling line |
CN108994091B (en) * | 2018-07-19 | 2019-10-01 | 本钢板材股份有限公司 | A kind of cold-rolling mill closes the scaling method of seam print |
CN112893475A (en) * | 2021-01-11 | 2021-06-04 | 山西太钢不锈钢股份有限公司 | Control method for buckling end of plate blank |
EP4029618A1 (en) * | 2021-01-18 | 2022-07-20 | Primetals Technologies Germany GmbH | Rolling with minimization of collapse of bending force in tapping |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SU698691A1 (en) | 1978-03-13 | 1979-11-25 | Донецкий Ордена Трудового Красного Знамени Политехнический Институт | Roll counter-bending method |
SU910261A1 (en) | 1980-08-08 | 1982-03-07 | Донецкий Ордена Трудового Красного Знамени Политехнический Институт | Method of counterbending rolls |
JPS5961512A (en) | 1982-09-30 | 1984-04-07 | Ishikawajima Harima Heavy Ind Co Ltd | Method for preventing meandering of rolling material |
SU1258543A2 (en) | 1985-03-26 | 1986-09-23 | Днепропетровский Ордена Трудового Красного Знамени Металлургический Институт Им.Л.И.Брежнева | Method of stabilizing strip shape in four-high rolling mill |
JPH0615317A (en) * | 1992-07-01 | 1994-01-25 | Toshiba Corp | Method for controlling hot finishing mill |
JPH07144211A (en) * | 1993-11-24 | 1995-06-06 | Kawasaki Steel Corp | Method for controlling meandering of tail end of sheet steel in hot finishing roll |
US5448901A (en) * | 1994-05-03 | 1995-09-12 | The University Of Toledo | Method for controlling axial shifting of rolls |
DE19730262C1 (en) | 1997-07-09 | 1998-10-22 | Mannesmann Ag | Rolling flat material and strip |
JP3879239B2 (en) * | 1998-03-24 | 2007-02-07 | Jfeスチール株式会社 | Crown control method |
SE513923C2 (en) * | 1998-07-10 | 2000-11-27 | Abb Ab | Method and apparatus for controlling the tail dimensions in a rolling mill |
CN1311922C (en) * | 2002-03-15 | 2007-04-25 | 西门子公司 | Computer-aided method for determing desired values for controlling elements of profile and surface evenness |
DE102004043790A1 (en) * | 2004-09-08 | 2006-03-09 | Betriebsforschungsinstitut VDEh - Institut für angewandte Forschung GmbH | Method and device for rolling a metal strip |
WO2009037766A1 (en) * | 2007-09-20 | 2009-03-26 | Toshiba Mitsubishi-Electric Industrial Systems Corporation | Plate thickness controller |
-
2006
- 2006-12-18 DE DE102006059709A patent/DE102006059709A1/en not_active Withdrawn
-
2007
- 2007-10-19 CA CA002672789A patent/CA2672789A1/en not_active Abandoned
- 2007-10-19 WO PCT/EP2007/061197 patent/WO2008074539A1/en active Application Filing
- 2007-10-19 PL PL07821561T patent/PL2094411T3/en unknown
- 2007-10-19 EP EP07821561A patent/EP2094411B1/en not_active Not-in-force
- 2007-10-19 UA UAA200906306A patent/UA97261C2/en unknown
- 2007-10-19 AT AT07821561T patent/ATE516898T1/en active
- 2007-10-19 CN CN200780046898.4A patent/CN101563174B/en not_active Expired - Fee Related
- 2007-10-19 BR BRPI0720430A patent/BRPI0720430A8/en not_active IP Right Cessation
- 2007-10-19 US US12/519,405 patent/US8459074B2/en not_active Expired - Fee Related
- 2007-10-19 RU RU2009127738/02A patent/RU2469808C2/en not_active IP Right Cessation
Non-Patent Citations (1)
Title |
---|
See references of WO2008074539A1 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107671126A (en) * | 2017-09-08 | 2018-02-09 | 张家港浦项不锈钢有限公司 | The horizontal control method of the upper and lower working roll of steekle mill |
Also Published As
Publication number | Publication date |
---|---|
UA97261C2 (en) | 2012-01-25 |
CA2672789A1 (en) | 2008-06-26 |
DE102006059709A1 (en) | 2008-06-19 |
CN101563174A (en) | 2009-10-21 |
CN101563174B (en) | 2015-04-22 |
BRPI0720430A8 (en) | 2016-10-18 |
BRPI0720430A2 (en) | 2013-12-31 |
RU2009127738A (en) | 2011-01-27 |
RU2469808C2 (en) | 2012-12-20 |
US8459074B2 (en) | 2013-06-11 |
ATE516898T1 (en) | 2011-08-15 |
WO2008074539A1 (en) | 2008-06-26 |
EP2094411B1 (en) | 2011-07-20 |
US20100031723A1 (en) | 2010-02-11 |
PL2094411T3 (en) | 2011-12-30 |
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