KR101454147B1 - Distortion computation method and rolling system - Google Patents
Distortion computation method and rolling system Download PDFInfo
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- KR101454147B1 KR101454147B1 KR1020147009650A KR20147009650A KR101454147B1 KR 101454147 B1 KR101454147 B1 KR 101454147B1 KR 1020147009650 A KR1020147009650 A KR 1020147009650A KR 20147009650 A KR20147009650 A KR 20147009650A KR 101454147 B1 KR101454147 B1 KR 101454147B1
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- 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
- B21B38/02—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring flatness or profile of strips
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C51/00—Measuring, gauging, indicating, counting, or marking devices specially adapted for use in the production or manipulation of material in accordance with subclasses B21B - B21F
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2263/00—Shape of product
- B21B2263/04—Flatness
- B21B2263/06—Edge waves
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2263/00—Shape of product
- B21B2263/04—Flatness
- B21B2263/08—Centre buckles
-
- 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
- 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
- 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
- B21B37/40—Control of flatness or profile during rolling of strip, sheets or plates using axial shifting of the rolls
-
- 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
- B21B38/04—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring thickness, width, diameter or other transverse dimensions 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
- B21B38/06—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring tension or compression
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Metal Rolling (AREA)
Abstract
A step of detecting the shape of the steel plate 101 rolled by the rolling apparatus 20 and a step of calculating a second variant? 2 representing a deformation appearing as a concavo-convex shape on the surface of the rolled steel sheet, Calculating a correlation between a critical value of the third strain? 3 indicating the strain corresponding to the internal stress of the rolled steel sheet and the shape of the rolled steel sheet and determining a third variant? 3 from the detected shape, , And the correlation is determined by the boundary condition determined by the detected shape, the plate thickness of the rolled steel plate, the plate width of the rolled steel plate, the tensile force of the rolled steel plate, and the distribution shape of the third deformation And the second strain? 2 and the third strain? 3 to calculate a first strain? 1 indicating the difference between the deformation corresponding to the total stress and the deformation of the steel sheet due to the target rolling doing Wherein the step of calculating the number of steps includes a step.
Description
The present invention relates to a calculation method and rolling system for calculating deformation and internal stress of a rolled steel sheet.
In the rolling of a steel sheet, a purpose is to obtain a steel sheet having a predetermined thickness (hereinafter also referred to as a target value) in thickness, width and length by applying stress to the steel sheet with a rolling apparatus before the rolling. However, it is not easy to obtain a steel sheet according to a target value, and various irregularities called an edge wave or a center wave are easily generated on the surface of the steel sheet after the rolling. The stress applied to the steel sheet from the rolling apparatus (hereinafter also referred to as total stress) can be determined by the following methods: 1) generation of deformation to a predetermined size to become a target value; 2) generation of various irregularities on the plate surface, 3) It is consumed in generating the residual stress in the steel sheet.
It is necessary to grasp and control the relationship between these deformation and stress in order to carry out rolling without causing irregularities on the plate surface. Particularly, it is important to grasp the difference between the deformation corresponding to the total stress and the deformation to be a predetermined size, and control it. However, a method of accurately grasping this car has not yet been realized.
In order to grasp the deformation in rolling, the shape of the steel sheet before and after rolling must be measured. Several techniques for measuring the shape of the rolled steel sheet are known. For example,
Further, there is known a shape prediction model for predicting the deformation of the rolled steel sheet and a technique for suppressing the occurrence of the shape defect of the steel sheet by rolling using the measurement data obtained by measuring the deformation of the rolled steel sheet.
On the other hand, there is known a technique for analyzing the mechanism of occurrence of defective shape of a thin plate such as an edge wave and a center wave. Non-Patent
However, in the control of the technique described in
In addition, in the technique described in
Further, in the technique described in
The first, second and third modifications are defined as follows.
The difference between the deformation corresponding to the stress applied to the steel plate from the rolling apparatus and the deformation required to be the predetermined value as the target value is referred to as a first deformation. A deformation appearing as a concave-convex shape on the surface of the rolled steel sheet, which is a deviation from the target value, is referred to as a second deformation. The deformation corresponding to the internal stress of the rolled steel sheet is referred to as a third deformation.
The gist of the present invention is as follows.
(1) a step of detecting the shape of the steel sheet rolled by the rolling apparatus,
Calculating from the detected shape a second deformation appearing as a concave-convex shape on the surface of the plate which is a deviation from the target value of the rolled steel plate;
A correlation between the threshold value of the third modification indicating the deformation corresponding to the internal stress of the rolled steel sheet and the wavelength of the rolling direction component of the detected shape and the third transformation from the wavelength of the rolling direction component of the detected shape Wherein the correlation is determined based on a boundary condition determined by the detected shape, a plate thickness of the rolled steel plate, a plate width of the rolled steel plate, a tensile force of the rolled steel plate, A step operated by analysis,
And a step of calculating a first deformation representing a deformation corresponding to a stress applied to the steel plate from the rolling apparatus and a deformation to be made to a predetermined size as a target value by adding the second deformation and the third deformation .
(2) The distribution shape of the third modification is such that the width direction component is monotonously increased from the central portion of the steel plate, the first straight line, the monotone increase curve and the monotonous decrease curve, the one end of which is the center portion of the steel sheet and the other end is the end portion of the steel sheet, An arithmetic operation method (1) in which the arithmetic shape decreasing monotonously from the vicinity of the end portion of the steel sheet, and the shape selected from a bone shape decreasing monotonically from the central portion of the steel sheet and increasing monotonously from the vicinity of the end portion of the steel sheet .
(3) The method according to (1) or (2), wherein the correlation is calculated by the buckling equation.
(4) The correlation is calculated by the FEM, and is stored as a table showing the corresponding relationship between the wavelength of the rolling direction component of the detected shape and the threshold value of the third modification, Modified operation method.
(5) transmitting a signal representing the calculated first strain to the rolling apparatus, wherein the rolling apparatus is configured to control the rolling of the rolled steel sheet to a desired shape based on the calculated first deformation, (4).
(6) The method according to (5), further comprising detecting that an edge wave or a center wave is formed over at least a half wavelength.
(7) The computing method according to (5), wherein the computing device is controlled such that the first transformation is zero.
(8) A rolling apparatus for rolling a steel sheet,
A shape measuring system for detecting the shape of the steel sheet rolled by the rolling apparatus,
A second deformation indicating a deformation appearing as a concavo-convex shape on the surface of the sheet, which is a deviation from the target value of the rolled steel sheet, is calculated from the detected shape,
The correlation between the shape of the rolled steel sheet and the threshold of the third modification showing the deformation corresponding to the internal stress of the rolled steel sheet and the third deformation from the detected shape, , The thickness of the rolled steel sheet, the tensile strength of the rolled steel sheet, and the distribution shape of the third deformation, which are calculated by the buckling analysis,
The first deformation indicating the difference between the deformation corresponding to the stress applied to the steel sheet from the rolling apparatus and the deformation to be the predetermined value to be the target value is calculated by adding the second deformation and the third deformation,
And a signal indicating the calculated first strain is transmitted to the rolling apparatus,
And the rolling apparatus is controlled so as to bring the first deformation to a desired value based on the calculated first deformation.
According to the present invention, on the basis of the second deformation showing the deformation appearing as the concave-convex shape on the surface of the rolled steel sheet deviating from the target value and the third deformation corresponding to the internal stress of the rolled steel sheet, It becomes possible to calculate the first deformation indicating the difference between the deformation corresponding to the stress applied to the steel plate and the deformation to be the predetermined value to be the target value.
Further, according to the present invention, it is possible to improve the yield of the steel sheet when the tensile force of the rolled steel sheet is small. For example, in hot rolling, it becomes possible to improve the yield of a portion (also referred to as a rolled top) rolled during the period from the start of rolling until the winding tension is generated. In the hot rolling, it is also possible to improve the yield of the rolled portion (also referred to as rolled bottom portion) while the winding tension immediately before completion of rolling is decreasing.
1 is a circuit block diagram of an example of a rolling system.
2 is a functional block diagram of the operation unit.
Fig. 3 (a) is a view showing an analysis image obtained by plot-displaying an example of data analyzed by the shape data analysis unit, and Fig. 3 (b) is a diagram showing the relationship between the second modification and the position in the width direction of the steel sheet.
4 is a diagram showing a determination processing flow of the boundary condition determination section.
5A is a view schematically showing a boundary condition in the case where the shape of the deformation appearing as the concavo-convex shape on the plate surface of the steel sheet is an edge wave, (C) is a diagram schematically showing a boundary condition in a case where the shape of deformation appearing as a concavo-convex shape on the plate surface of the steel sheet is a quarter wave. Fig.
6A is a graph showing the displacement of the rolling direction component of the concavo-convex shape of the steel sheet, FIG. 6B is a graph showing the relationship between the average value of the plastic deformation distribution and the half- (C) is a diagram showing the correlation between the average value of the plastic deformation distribution and the half-wavelength of the rolling direction component of the concavo-convex shape of the steel sheet, and (d) Is a diagram showing the distribution of the computed third variant.
7A is a view showing the distribution from the widthwise center portion to the widthwise end portion of the second modified steel plate, FIG. 7B is a view showing the distribution from the widthwise central portion to the widthwise end portion of the steel plate of the third modification (C) is a view showing the distribution from the widthwise center portion to the widthwise end portion of the first modified steel sheet obtained by adding the second and third modifications. FIG.
8 is a diagram showing an example of a calculation flow for calculating the first variant.
9 is a circuit block diagram of another example of a rolling system.
10 is a diagram showing another example of the calculation flow for calculating the first variant.
11 is a circuit block diagram of another example of a rolling system.
12 is a diagram showing another example of the distribution of the third modification.
Hereinafter, a rolling system having a power supply selection circuit according to the present invention will be described with reference to Figs. First, the first embodiment of the rolling system will be described with reference to Figs.
1 is a circuit block diagram of the rolling
The rolling
The transforming
The
The
The I /
The stands 21 of the plural stages each have a pair of upper and lower work rolls and a pair of reinforcement rolls arranged so as to sandwich the work roll. The number of stages of the
The
The
The
The
Fig. 2 is a functional block diagram of the
The
The shape
3A is a diagram showing an
The
The cross section of the sinusoidal shape of the analyzed
Based on the data analyzed by the shape
Here, dx ij is the distance between the detection points adjacent to each other in the x-axis direction, and dz ij is the distance in the z-axis direction between detection points corresponding to dx ij . L is a half wavelength of the rolling direction component of the concavo-convex shape periodically appearing on the
Fig. 3 (b) is a diagram showing the relationship between the calculated second strain epsilon 2 and the position in the width direction of the
The boundary
4 is a diagram showing a determination processing flow of the boundary
First, in step S1O1, the boundary
When the boundary
If the boundary
If the boundary
If the boundary
Fig. 5 is a view schematically showing a boundary condition determined by the concave-convex shape of the
The boundary condition in the case where the shape of the deformation appearing as the concavo-convex shape on the plate surface of the
The boundary condition in the case where the shape of the deformation appearing as the concavo-convex shape on the plate surface of the
The boundary condition in the case where the shape of the deformation appearing as the concavo-convex shape on the plate surface of the
The third
The third
The third
Here, w denotes displacement in the height direction of the concavo-convex shape,
And represents an average value of the plastic strain distribution? X * . B is the length of half the width of the rolled
to be. Further, the widthwise component w (y) of the displacement in the height direction of the uneven shape of the rolled
On the other hand, the rolling direction component of the displacement in the height direction of the concavo-convex shape of the rolled
Fig. 6 (a) shows the rolling direction component of the concavo-convex shape of the
6 (b) and 9 (9), the widthwise component of the distribution of the third modification is a non-dimensional quadratic curve with the center in the width direction as the origin do.
Further, if the equation (3) is simplified by integrating by a half wavelength L, the equation (10) is derived.
In order to obtain the solution by discretizing the equation (10), the equation (10) is discretized as shown in the equation (11).
Here, the right side is the integral of each element. Between by deploying the
6C is a graph showing the correlation between the average value? M * of the plastic deformation distribution? X * calculated by the equation (11) and the half wavelength L of the rolling direction component of the uneven shape of the
The third
Subsequently, the third
6D is a diagram showing the relationship between the threshold value of the third modification? 3 determined by the third
The first
Fig. 7A is a view showing the distribution from the widthwise center portion to the widthwise end portion of the
Next, the computation flow of the first variant? 1 by the
Fig. 8 is a diagram showing the calculation flow of the first variant? 1 by the
First, in step S201, the
Subsequently, in step S202, the shape
Subsequently, in step S203, the second
Subsequently, in step S204, the boundary
Subsequently, in step S205, the third
Then, in step S206, the first
The calculation flow of the
In the third modification? 3, there is an n-th mode in which the periods are different, but the
The hot
The shape of the
The
The first embodiment of the rolling system has been described above.
Next, a second embodiment of the rolling system will be described with reference to Figs. 9 and 10. Fig.
9 is a circuit block diagram of the rolling
The rolling
The
The steel sheet shape table 41 includes a correspondence between the identification number of the steel sheet rolled to the rolling
The third modified operation table 42 includes the correlation between the average value? M * of the plastic deformation distribution? X * and the half wavelength L of the rolling direction component of the concavo-convex shape of the
Fig. 10 is a diagram showing the calculation flow of the first variant? 1 in the rolling
In steps S301 to S304 and S306 of the arithmetic flow shown in Fig. 10, the same processing as steps S201 to S204 and S206 in the arithmetic flow shown in Fig. 8 is executed. In other words, the arithmetic flow shown in Fig. 10 differs from the arithmetic flow shown in Fig. 8 in the processing in step S305. Specifically, in the operation flow shown in FIG 10, the
The second embodiment of the rolling system has been described above.
Next, a third embodiment of the rolling system will be described with reference to Fig.
11 is a circuit block diagram of the rolling
The rolling
The third embodiment of the rolling system has been described above.
Next, the deformation of the rolling system will be described.
In the rolling
In the rolling
In the rolling
In the rolling
The rolling
Although the second
When the detection data transmitted from the shaping
The detected data transmitted from the
When the solution of the buckling equation is obtained, the distribution of the third deformation in the width direction is assumed to be a non-dimensionalized quadratic curve with the center in the width direction as the origin, A straight line, a cubic curve, or a quadratic curve. Further, when the solution of the buckling equation is solved, the third
The
In the rolling
In the rolling
Example
Two examples of the embodiment in which the thin steel sheet is rolled in the hot
In the hot
As a result, the shape hit ratio of the thin steel sheet was improved by 20% compared to that of the conventional shape measuring system, compared with the shape hit ratio of the hot rolled steel sheet.
In the
As a result, the shape hit ratio of the rear steel sheet was improved by 15% in the post-reverse steel sheet compared with the conventional shape-based system.
It is to be understood that all the examples and conditions described herein are for the purpose of helping to understand the concept of the invention applied to the invention and technology and that the speci fi c examples and conditions are intended to limit the scope of the invention The construction of such an example of the specification does not indicate the advantages and disadvantages of the invention. While the embodiments of the invention have been described in detail, it should be understood that various changes, substitutions and alterations can be made without departing from the spirit and scope of the invention.
1, 2, 3: Rolling system
10:
20: Hot tandem rolling device
25: Hot reverse rolling device
30 and 35:
Claims (8)
Calculating a second deformation indicating a deformation appearing as a concavo-convex shape on the surface of the sheet, which is a deviation from a target value of the rolled steel sheet, from the detected shape;
A correlation between a threshold value of a third modification showing deformation corresponding to an internal stress of the rolled steel sheet and a wavelength of a rolling direction component of the detected shape and a correlation between a wavelength of a rolling direction component of a shape obtained from the detected shape Wherein the correlation is determined based on a boundary condition determined by the detected shape, a plate thickness of the rolled steel plate, a plate width of the rolled steel plate, a tension of the rolled steel plate, A step of calculating from the distribution shape of the third modification by a buckling analysis,
And a step of calculating a first deformation indicating a difference between deformation corresponding to the stress applied to the steel sheet from the rolling apparatus and deformation of the steel sheet due to the target rolling by adding the second deformation and the third deformation Wherein said method further comprises:
The distribution shape of the third modification is such that the width direction component is monotonously increased from the central portion of the steel plate, the first straight line, the monotone increase curve and the monotonous decrease curve, one end of which is the center portion of the steel sheet, Wherein the shape of the steel plate is calculated from an arcuate shape decreasing monotonously from the vicinity of the end and a shape selected from a shape of a bone which is monotonically decreased from the central portion of the steel plate and monotonously increased from the vicinity of the end of the steel plate.
Wherein the correlation is calculated by a buckling equation.
Wherein the correlation is stored as a table obtained by an FEM and indicating a correspondence between a wavelength of a rolling direction component of the detected shape and a threshold value of the third modification.
Further comprising the step of transmitting a signal indicating the calculated first strain to the rolling apparatus,
Wherein the calculating device is controlled so that the rolled steel sheet has a desired shape based on the calculated first deformation.
And detecting that the edge wave or the center wave is formed over at least a half wavelength.
Wherein the computing device is controlled such that the first transformation is zero.
A shape measuring system for detecting the shape of the steel sheet rolled by the rolling apparatus,
From the detected shape, a second deformation indicating a deformation appearing as a concave-convex shape on the surface of the sheet, which is a deviation from the target value of the rolled steel sheet,
A correlation between a threshold value of a third modification showing a deformation corresponding to an internal stress of the rolled steel sheet and a wavelength of a rolling direction component of a shape obtained from the detected shape and a correlation between a rolling direction of a shape obtained from the detected shape Wherein the correlation is determined based on a boundary condition determined by the detected shape, a thickness of the rolled steel sheet, a width of the rolled steel sheet, a thickness of the rolled steel sheet, Tensile force and the distribution shape of the third modification,
Calculating a first deformation indicating a difference between deformation corresponding to the stress applied to the steel plate from the rolling apparatus and deformation of the steel plate due to the target rolling by adding the second deformation and the third deformation,
And a transforming arithmetic unit for transmitting a signal representing the calculated first deformation to the rolling apparatus,
Wherein the rolling apparatus is controlled so as to bring the rolled steel sheet into a desired shape based on the calculated first deformation.
Applications Claiming Priority (1)
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PCT/JP2012/075706 WO2014054140A1 (en) | 2012-10-03 | 2012-10-03 | Distortion calculation method and rolling system |
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EP (1) | EP2737963B1 (en) |
JP (1) | JP5257559B1 (en) |
KR (1) | KR101454147B1 (en) |
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JP6172401B2 (en) * | 2014-09-16 | 2017-08-02 | 新日鐵住金株式会社 | Rolling control method of metal plate, rolling control device, and manufacturing method of rolled metal plate |
WO2017199959A1 (en) | 2016-05-16 | 2017-11-23 | 新東工業株式会社 | Surface treatment processing method and surface treatment processing device |
CN109070161B (en) * | 2016-07-26 | 2020-04-21 | 东芝三菱电机产业系统株式会社 | Control device of edge trimmer |
CN112789123B (en) * | 2018-10-05 | 2024-03-22 | 纽科尔公司 | Flatness defect detection using a single thickness profiler |
JP7151513B2 (en) * | 2019-01-29 | 2022-10-12 | 日本製鉄株式会社 | Roller straightening method |
US11281818B2 (en) | 2019-02-28 | 2022-03-22 | Ford Motor Company | Method for evaluating an adhesive for a vehicular joint |
CN111922267A (en) * | 2020-07-31 | 2020-11-13 | 安徽信息工程学院 | Steel rolling control system and method |
CN113405485B (en) * | 2021-04-20 | 2022-10-04 | 北京机科国创轻量化科学研究院有限公司 | Surface quality diagnosis method based on plastic deformation-aerodynamic cross theory |
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JPH05237546A (en) * | 1991-12-06 | 1993-09-17 | Yoshikawa Kogyo Co Ltd | Straightening device |
JPH09295022A (en) * | 1996-05-07 | 1997-11-18 | Nkk Corp | Shape control method in reverse rolling |
JP4262142B2 (en) * | 2003-10-28 | 2009-05-13 | 新日本製鐵株式会社 | Metal plate shape prediction method and metal plate manufacturing method |
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JP2988645B2 (en) * | 1991-12-24 | 1999-12-13 | 川崎製鉄株式会社 | Measurement method of sheet material distortion shape |
JP3302914B2 (en) * | 1997-12-10 | 2002-07-15 | 株式会社神戸製鋼所 | Method and apparatus for manufacturing hot-rolled steel sheet |
JP4256558B2 (en) * | 2000-03-10 | 2009-04-22 | 新日本製鐵株式会社 | Steel plate shape determination apparatus, method, and computer-readable storage medium |
DE10346274A1 (en) * | 2003-10-06 | 2005-04-28 | Siemens Ag | Method and control device for operating a rolling train for metal strip |
US7823428B1 (en) * | 2006-10-23 | 2010-11-02 | Wright State University | Analytical method for use in optimizing dimensional quality in hot and cold rolling mills |
EP2301684A1 (en) * | 2009-09-24 | 2011-03-30 | Siemens Aktiengesellschaft | Welding method with optimised strain protection |
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2012
- 2012-10-03 CN CN201280025252.9A patent/CN103842107B/en active Active
- 2012-10-03 WO PCT/JP2012/075706 patent/WO2014054140A1/en unknown
- 2012-10-03 KR KR1020147009650A patent/KR101454147B1/en active IP Right Grant
- 2012-10-03 JP JP2013505018A patent/JP5257559B1/en active Active
- 2012-10-03 EP EP12877083.1A patent/EP2737963B1/en active Active
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH05237546A (en) * | 1991-12-06 | 1993-09-17 | Yoshikawa Kogyo Co Ltd | Straightening device |
JPH09295022A (en) * | 1996-05-07 | 1997-11-18 | Nkk Corp | Shape control method in reverse rolling |
JP4262142B2 (en) * | 2003-10-28 | 2009-05-13 | 新日本製鐵株式会社 | Metal plate shape prediction method and metal plate manufacturing method |
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JPWO2014054140A1 (en) | 2016-08-25 |
CN103842107B (en) | 2015-09-30 |
JP5257559B1 (en) | 2013-08-07 |
EP2737963A1 (en) | 2014-06-04 |
KR20140066752A (en) | 2014-06-02 |
EP2737963A4 (en) | 2015-04-01 |
CN103842107A (en) | 2014-06-04 |
WO2014054140A1 (en) | 2014-04-10 |
EP2737963B1 (en) | 2016-05-18 |
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