US20090031777A1 - Method for thickness regulation during a hot-rolling process - Google Patents
Method for thickness regulation during a hot-rolling process Download PDFInfo
- Publication number
- US20090031777A1 US20090031777A1 US11/990,529 US99052906A US2009031777A1 US 20090031777 A1 US20090031777 A1 US 20090031777A1 US 99052906 A US99052906 A US 99052906A US 2009031777 A1 US2009031777 A1 US 2009031777A1
- Authority
- US
- United States
- Prior art keywords
- sheet
- gage
- rolling
- automatic
- 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.)
- Abandoned
Links
Images
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
- B21B1/24—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
- 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
- B21B1/34—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 by hot-rolling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2265/00—Forming parameters
- B21B2265/12—Rolling load or rolling pressure; roll force
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2271/00—Mill stand parameters
- B21B2271/02—Roll gap, screw-down position, draft position
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2271/00—Mill stand parameters
- B21B2271/06—Mill spring
-
- 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
-
- 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
- B21B31/32—Adjusting or positioning rolls by moving rolls perpendicularly to roll axis by liquid pressure, e.g. hydromechanical adjusting
-
- 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
- B21B37/62—Roll-force control; Roll-gap control by control of a hydraulic adjusting device
-
- 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
- B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
-
- 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
- B21B38/08—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring roll-force
Definitions
- the invention concerns a method for automatic gage control during rolling, especially hot rolling, with at least one rolling stand, where factors that are considered include the present mean position of the adjustment cylinders of the rolling stand and their total rolling force.
- DE 20 20 402 discloses a method for calculating the gage G 1 of a thin, hard workpiece after a reducing pass through a reducing mill train with opposing rolling surfaces and a measuring instrument for measuring the roll separating forces, which are produced during the passage of the workpiece through the opposing rolling surfaces during a reducing operation, in which
- a signal that is a measure of a calculated stretch error is generated by varying the signal that represents the range of uncertainty as a function of the draft predicted for the reducing pass, of the mill stretch predicted for the reducing pass, and of the relative probability of error in predicting both draft and mill stretch, and
- a signal that is a measure of the calculated gage G 1 is generated by adding the signal that represents the gage G 3 to the calculated stretch error.
- a supplementary set value is added, which is formed from the difference between the actual value (F r ) of the prestressing force and the initial value (F r0 ) of the prestressing force and is evaluated with the ratio (c a /(c i +c a )) of the spring stiffness (c a ) of the outer part of the stand to the sum of the spring stiffness (c i ) of the inner part of the stand and the spring stiffness (c a ) of the outer part of the stand.
- the so-called gage meter principle for determining the present strip gage has been used for automatic gage control during hot strip rolling.
- the measured S DS , S OS of the adjustment cylinders is corrected by the calculated mill stretch g (see also FIG. 1 ).
- the mill stretch g is calculated with the use of the measured rolling force F DS , F OS and a mill stretch curve 1 /M G .
- the strip gage determined in this way is then compared with the gage set value and automatically controlled. Besides the measurements of position and rolling force, an exact mill model is needed for this method.
- the objective of the invention is to improve a method of the type described above in such a way that the disadvantages specified above are avoided.
- this objective is achieved by minimizing the mill stretch component. This is accomplished by carrying out at least one additional position measurement by detecting position signals in the immediate vicinity of the roll gap of the rolling stands. In this connection, especially the position signals between the work rolls and/or the backup rolls and/or the work roll chocks and/or the backup roll chocks are to be considered/detected.
- the advantage of the method of the invention is that the position measurement contains a smaller mill stretch component. Thus, only the roll flattening and the roll bending are to be considered. Other components, such as the expansion of the columns and the crossheads, do not have to be considered. Specifically in the measurement of the separation of the work roll chocks, the suspension of the Morgoil bearings, the bending of the backup rolls, and backup roll eccentricities do not have to be taken into consideration. As shown in FIG. 2 , the prior-art method for automatic gage control is still used in its entirety and is improved or expanded by the features described above.
- the method of the invention results in a more exact determination of the strip gage in the case of hard materials and, especially in the case of thin strip rolling, improves the dynamic behavior of the automatic gage control system.
- the signals that are obtained can also be used for automatic position control and/or for automatic swivel control and/or for calculation of the strip gage and thus for automatic control of the strip gage.
- FIG. 1 shows a flowchart for automatic gage control in accordance with the prior art.
- FIG. 2 shows a flowchart for automatic gage control in accordance with the invention.
- FIG. 1 shows a flowchart of prior-art automatic gage control during rolling, especially hot rolling.
- a rolling stand consisting, for example, of a pair of work rolls AW and a pair of backup rolls SW has an operating side OS and a drive side DS.
- a strip B is positioned between the pair of work rolls AW.
- the cylinder position of the operating side S OS and the cylinder position of the drive side S DS are determined, and the present mean cylinder position S ACT is determined.
- the total rolling force F ACT is determined by determining the rolling force on the operating side F OS and the rolling force on the drive side F DS .
- the mill stretch g is calculated with the use of the total rolling force F ACT and a mill stretch curve 1 /M G .
- the present strip gage h ACT is determined by measurement of the present mean cylinder position S ACT and the calculated mill stretch g.
- the present strip gage h ACT is compared with the strip gage set value h REF and used for automatic gage control.
- the automatic gage controller outputs the position set value for the automatic cylinder position control system.
- the prior-art automatic control system is improved as shown in the flowchart in FIG. 2 .
- the separation of the work roll chocks on the operating side S ROS and on the drive side S RDS is measured, and then the mean separation of the work roll chocks S R is determined.
- the value for the present mean cylinder position S ACT which continues to be determined, as in the prior art, is directly compared with the cylinder position set value S REF .
- the values of the rolling force on the operating side F OS and the rolling force on the drive side F DS also continue to be determined and lead to the total rolling force F ACT . These are combined, in accordance with the invention, with a mill modulus M R with respect to the work roll chocks, and then the mill stretch g R with respect to the work roll chocks is determined.
- the mill modulus M R depends on the selected position measurement.
- the position signals of the position measurement that are to be taken into consideration for the method, with at least one position signal being required, are determined between the work rolls AW and/or the backup rolls SW and/or the work roll chocks and/or the backup roll chocks.
- the mill stretch to be taken into consideration in the method of the invention is to be coordinated with the given site of the position signal that is obtained.
- the separation on the operating side S ROS and the separation on the drive side S RDS lead to the mean separation of the work roll chocks S R , for example.
- the present strip gage h ACT is determined from the separation of the work roll chocks S R and the mill stretch with respect to the work roll chocks g R and is then compared with the strip gage set value h REF and automatically controlled.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Metal Rolling (AREA)
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102005040690 | 2005-08-26 | ||
DE10-2005-040-690.4 | 2005-08-26 | ||
DE10-2005-042-837.1 | 2005-09-09 | ||
DE102005042837A DE102005042837A1 (de) | 2005-08-26 | 2005-09-09 | Verfahren zur Dickenregelung beim Warmwalzen |
PCT/EP2006/007249 WO2007022841A1 (de) | 2005-08-26 | 2006-07-24 | Verfahren zur dickenregelung beim warmwalzen |
Publications (1)
Publication Number | Publication Date |
---|---|
US20090031777A1 true US20090031777A1 (en) | 2009-02-05 |
Family
ID=37198982
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/990,529 Abandoned US20090031777A1 (en) | 2005-08-26 | 2006-07-24 | Method for thickness regulation during a hot-rolling process |
Country Status (12)
Country | Link |
---|---|
US (1) | US20090031777A1 (ko) |
EP (1) | EP1919638A1 (ko) |
JP (1) | JP2009505835A (ko) |
KR (1) | KR20080037010A (ko) |
AU (1) | AU2006284201A1 (ko) |
BR (1) | BRPI0615089A2 (ko) |
CA (1) | CA2620000A1 (ko) |
DE (1) | DE102005042837A1 (ko) |
MX (1) | MX2008002631A (ko) |
RU (1) | RU2008111505A (ko) |
TW (1) | TW200709865A (ko) |
WO (1) | WO2007022841A1 (ko) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103706644B (zh) * | 2013-12-20 | 2016-04-27 | 秦皇岛首秦金属材料有限公司 | 基于测厚仪测量厚度的辊缝设定值自适应控制方法 |
DE102021209714A1 (de) * | 2020-09-22 | 2022-03-24 | Sms Group Gmbh | Vorrichtung und Verfahren zum Walzen von metallischem Band |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3457748A (en) * | 1966-09-29 | 1969-07-29 | British Iron Steel Research | Rolling of strip |
US4126026A (en) * | 1977-09-26 | 1978-11-21 | General Electric Company | Method and apparatus for providing improved automatic gage control setup in a rolling mill |
US4126027A (en) * | 1977-06-03 | 1978-11-21 | Westinghouse Electric Corp. | Method and apparatus for eccentricity correction in a rolling mill |
US4898012A (en) * | 1988-04-22 | 1990-02-06 | United Engineering, Inc. | Roll bite gauge and profile measurement system for rolling mills |
US4909060A (en) * | 1988-01-26 | 1990-03-20 | United Engineering, Inc. | Oil compression compensation system |
US6286348B1 (en) * | 1999-04-09 | 2001-09-11 | Kabushiki Kaisha Toshiba | Strip thickness controller for rolling mill |
US6401506B1 (en) * | 1998-02-27 | 2002-06-11 | Nippon Steel Corporation | Sheet rolling method and sheet rolling mill |
US7475581B2 (en) * | 2003-10-13 | 2009-01-13 | Siemens Vai Metals Technologies Sas | Method of increasing the control precision of the path of a product in a levelling machine with interlocking rollers, and levelling installation used to implement same |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3574280A (en) * | 1968-11-12 | 1971-04-13 | Westinghouse Electric Corp | Predictive gauge control method and apparatus with adaptive plasticity determination for metal rolling mills |
BE826284A (fr) * | 1974-03-05 | 1975-09-04 | Appareillage de regulation automatique d'epaisseur dans un laminoir | |
JPH04100625A (ja) * | 1990-08-20 | 1992-04-02 | Sumitomo Metal Ind Ltd | 自動板厚制御方法 |
DE59505484D1 (de) * | 1994-07-08 | 1999-05-06 | Siemens Ag | Einrichtung zur Erfassung des Walzspaltes zwischen zwei Arbeitswalzen eines Walzgerüstes |
DE102004005011B4 (de) * | 2004-01-30 | 2008-10-02 | Betriebsforschungsinstitut VDEh - Institut für angewandte Forschung GmbH | Regelverfahren und Regler für ein Walzgerüst |
-
2005
- 2005-09-09 DE DE102005042837A patent/DE102005042837A1/de not_active Withdrawn
-
2006
- 2006-07-21 TW TW095126619A patent/TW200709865A/zh unknown
- 2006-07-24 US US11/990,529 patent/US20090031777A1/en not_active Abandoned
- 2006-07-24 AU AU2006284201A patent/AU2006284201A1/en not_active Abandoned
- 2006-07-24 KR KR1020087003003A patent/KR20080037010A/ko not_active Application Discontinuation
- 2006-07-24 WO PCT/EP2006/007249 patent/WO2007022841A1/de active Application Filing
- 2006-07-24 EP EP06776361A patent/EP1919638A1/de not_active Withdrawn
- 2006-07-24 JP JP2008527327A patent/JP2009505835A/ja not_active Withdrawn
- 2006-07-24 CA CA002620000A patent/CA2620000A1/en not_active Abandoned
- 2006-07-24 BR BRPI0615089-6A patent/BRPI0615089A2/pt not_active Application Discontinuation
- 2006-07-24 MX MX2008002631A patent/MX2008002631A/es not_active Application Discontinuation
- 2006-07-24 RU RU2008111505/02A patent/RU2008111505A/ru not_active Application Discontinuation
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3457748A (en) * | 1966-09-29 | 1969-07-29 | British Iron Steel Research | Rolling of strip |
US4126027A (en) * | 1977-06-03 | 1978-11-21 | Westinghouse Electric Corp. | Method and apparatus for eccentricity correction in a rolling mill |
US4126026A (en) * | 1977-09-26 | 1978-11-21 | General Electric Company | Method and apparatus for providing improved automatic gage control setup in a rolling mill |
US4909060A (en) * | 1988-01-26 | 1990-03-20 | United Engineering, Inc. | Oil compression compensation system |
US4898012A (en) * | 1988-04-22 | 1990-02-06 | United Engineering, Inc. | Roll bite gauge and profile measurement system for rolling mills |
US6401506B1 (en) * | 1998-02-27 | 2002-06-11 | Nippon Steel Corporation | Sheet rolling method and sheet rolling mill |
US6286348B1 (en) * | 1999-04-09 | 2001-09-11 | Kabushiki Kaisha Toshiba | Strip thickness controller for rolling mill |
US7475581B2 (en) * | 2003-10-13 | 2009-01-13 | Siemens Vai Metals Technologies Sas | Method of increasing the control precision of the path of a product in a levelling machine with interlocking rollers, and levelling installation used to implement same |
Also Published As
Publication number | Publication date |
---|---|
JP2009505835A (ja) | 2009-02-12 |
AU2006284201A1 (en) | 2007-03-01 |
EP1919638A1 (de) | 2008-05-14 |
RU2008111505A (ru) | 2009-10-10 |
BRPI0615089A2 (pt) | 2011-05-03 |
MX2008002631A (es) | 2008-03-14 |
KR20080037010A (ko) | 2008-04-29 |
CA2620000A1 (en) | 2007-03-01 |
WO2007022841A1 (de) | 2007-03-01 |
AU2006284201A2 (en) | 2008-05-01 |
DE102005042837A1 (de) | 2007-03-08 |
TW200709865A (en) | 2007-03-16 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: SMS DEMAG AG, GERMANY Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:JEPSEN, OLAF NORMAN;REEL/FRAME:020565/0606 Effective date: 20080118 |
|
AS | Assignment |
Owner name: SMS SIEMAG AKTIENGESELLSCHAFT, GERMANY Free format text: CHANGE OF NAME;ASSIGNOR:SMS DEMAG AG;REEL/FRAME:023725/0342 Effective date: 20090325 Owner name: SMS SIEMAG AKTIENGESELLSCHAFT,GERMANY Free format text: CHANGE OF NAME;ASSIGNOR:SMS DEMAG AG;REEL/FRAME:023725/0342 Effective date: 20090325 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |