CN1228152C - Cold-mill shape controlling method and apparatus - Google Patents
Cold-mill shape controlling method and apparatus Download PDFInfo
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- CN1228152C CN1228152C CNB031472850A CN03147285A CN1228152C CN 1228152 C CN1228152 C CN 1228152C CN B031472850 A CNB031472850 A CN B031472850A CN 03147285 A CN03147285 A CN 03147285A CN 1228152 C CN1228152 C CN 1228152C
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- shape
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- rolling mill
- rolled
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- 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
- B21B37/30—Control of flatness or profile during rolling of strip, sheets or plates using roll camber control
- B21B37/32—Control of flatness or profile during rolling of strip, sheets or plates using roll camber control by cooling, heating or lubricating the rolls
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
- B21B27/06—Lubricating, cooling or heating rolls
- B21B27/10—Lubricating, cooling or heating rolls externally
-
- 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
- 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
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
- B21B27/06—Lubricating, cooling or heating rolls
- B21B27/10—Lubricating, cooling or heating rolls externally
- B21B2027/103—Lubricating, cooling or heating rolls externally cooling externally
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Metal Rolling (AREA)
Abstract
Provided is a method and a device of shape control in a cold-rolling mill by which defects in shape of local elongation and compound shape are suppressed and shape control is carried out with high accuracy. A plurality of air nozzles 95 are disposed along the width direction of a material 2 to be rolled on the outlet side of the cold-rolling mill 15 and air is jetted from the air nozzles 95 onto the material 2 to be rolled. The manipulated variable of the air jetted from a plurality of the air nozzles 95 is determined by using shape absolute value deviation and shape space deviation which are determined from the target shape and a detected shape with a shape controlling device 5. The air quantity jetted from a plurality of the air nozzles 95 is adjusted on the basis of the manipulated variable of the air with an air adjusting device 84.
Description
Technical field
The present invention relates to control shape control method and device with cold-rolling mill rolling the be rolled shape of material.
Prior art
At the rolling high precision int that from the viewpoint of improving the quality of products and boosting productivity, requires shape to control in the milling train of material that is rolled.The flatness that be rolled material (plate shape) of the shape of milling train control by improving the milling train outlet side, thus obtain the operational ton adjustment actuator of actuator according to the detection shape of milling train outlet side and the form variations computing of target shape.
In 6 grades of cold-rolling mills, working roller bending (bender) (WR bending), intermediate calender rolls bending (bender) (IMR bending) are arranged, depress rectification, put cooling as actuator.WR bending, IMR bending are the functions that makes various roll deflections, utilize the deflection change of roll to be rolled the distribution of power of milled sheet of width of material and the wide overall shape of control panel.
In addition, depress that to correct be depressing position (roll gap) poor of the operation side that is arranged at milling train respectively, driving side, operate the distribution of power of milled sheet of it is rolled material by change width and the wide overall shape of control panel.Point cooling is that the working roll (operation roller) to milling train sprays the heat hat (thermal crown) that pure water or lubricated wet goods cooling medium change the operation roller partly and controls local the extension or compound shape by the distribution of the roll-force of change plate width direction.
In hot-rolling mill, for example, open described in the 2001-129608 communique as the spy, the supercooling occurrence positions of the part of assay plate cross direction uses operation roller by a small amount of grinding adjustment and the roller surface of the corresponding part of local cooling occurrence positions to come the plate after cooling hot-rolled and the Temperature Distribution of control panel cross direction is known.
In addition, open described in the 2001-73041 communique as the spy, generation for the distortion of the temperature deviation that prevents to follow plate width direction, obtain the central portion chilling temperature that do not deform and cooling range and inject cooling water and blow air, carry out temperature control so that the Temperature Distribution of plate width direction is known at edge side than being positioned between edge part and the central portion near the low temperature central portion and maximum temperature portion to the edge side zone to the central portion zone.
So, in hot rolling because being the high reviewing knowledge already acquired Temperature Distribution that is rolled material distributes and the plate shape has a significant impact to the hardness of material, so control the Temperature Distribution that is rolled material energetically.
In the prior art, low because temperature is compared in cold rolling and hot rolling, thus can think that the temperature that is rolled material is little to the influence of shape, with working roller bending, intermediate calender rolls bending, depress to correct and carry out shape control.But only existing can the wide overall shape of control panel, does not carry out local extend or the control compound shape can not the such problem of high-precision shape control.
Summary of the invention
The object of the present invention is to provide a kind of shape defect that suppresses local extension or compound shape can carry out the shape control method and the device of the cold-rolling mill of high-precision shape control.
The invention is characterized in, the cold-rolling mill outlet side along the plate width direction that is rolled material dispose a plurality of air nozzles from air nozzle to being rolled the injection of material air, obtain the air-operated amount of spraying with shape absolute value deviation and the shape space deviation obtained according to target shape and detection shape, regulate the air capacity of spraying based on this air-operated amount from a plurality of air nozzles from a plurality of air nozzles.
Here, in this manual, the shape of the plate width direction that is rolled material is divided into the shape desired value in a plurality of interval same intervals of detecting and the deviation of SHAPE DETECTION value calls shape absolute value deviation, in addition, the deviation of certain interval shape absolute value deviation and another interval shape absolute value deviation is called shape space deviation (or shaped position deviation).Another interval preferably is taken as two neighbours' in certain interval interval.
The present invention is owing to use shape absolute value deviation and the shape space deviation obtained according to target shape and detection shape to obtain the air-operated amount of spraying from a plurality of air nozzles, regulate the air capacity of spraying based on this air-operated amount, so can suppress the shape control that the shape defect of local extension or compound shape is rolled material accurately from a plurality of air nozzles.
Description of drawings
Fig. 1 is the pie graph of expression one embodiment of the present of invention.
Fig. 2 is the local pie graph of one embodiment of the present of invention.
Fig. 3 is the routine pie graph of one of shape control unit of the present invention.
Fig. 4 is the pie graph of one of expression classification mechanism of the present invention example.
Fig. 5 is the performance plot that is used for illustrating effect of the present invention.
The specific embodiment
Fig. 1 illustrates one embodiment of the present of invention, and 5 cold-rolling mills 11～15 of the 1st～the 5th frame dispose continuously, is rolled material 2 and is rolled in the 1st～the 5th frame successively along the handover of the rolling direction shown in the arrow.Milling train 11～15 is 6 grades of formulas, and by a pair of working roll 17 of face-off, a pair of intermediate calender rolls 18 that clips working roll 17 constitutes with a pair of backing roll 19 that clips intermediate calender rolls 18.
Outlet side in the 5th frame (final frame) 15 is provided with the SHAPE DETECTION roller 3 that detects the shape that is rolled material 2.SHAPE DETECTION roller 3 is divided into the shape that a plurality of interval 1～n detect each interval 1～n to the plate width direction that is rolled material 2 as shown in Figure 2.In addition, the milling train that the position is set 15 1 sides at the outlet side SHAPE DETECTION roller 3 of milling train 15 are disposing a plurality of (n) air nozzle 95 along the plate width direction (roll shaft heart direction) that is rolled material 2.Air nozzle 95 is disposed at each SHAPE DETECTION interval 1～n of SHAPE DETECTION roller 3, is rolled material 2 injection airs to the interval of correspondence.
The output signal of SHAPE DETECTION device 4 input SHAPE DETECTION rollers 3 is transformed into the SHAPE DETECTION signal and is added to shape control apparatus 5 and shape display device 10.The shape control operation amount of the shape desired value of shape control apparatus 5 input shape set devices 6 and SHAPE DETECTION value (shape actual value) the operation board cross direction of SHAPE DETECTION device 4 is given bending (bender) control device 81, depressing position control device 82, some cooling controller 83 and air adjusting device 84.
The working roller bending of bending control device 81 control working rolls 17 and the intermediate calender rolls bending of intermediate calender rolls 18, the depressing position of depressing position control device 82 operation backing rolls 19.In addition, injection water or lubricated wet goods cooling medium change the heat hat of working roll 17 and change the distribution of the roll-force of plate width direction point cooling controller 83 partly from 94 pairs of working rolls 17 of nozzle.
Air adjusting device 84 possesses the air valve 85 of adjusting overall flow and n air valve 86 adjusting flow at n air nozzle 95 in each as shown in Figure 2, and the flow distribution of plate width direction is adjusted in adjusting from n the air nozzle 95 air emitted doses that are located at final frame 15 outlet sides.Air adjusting device 84 also can be by 7 manual operations of air-operated device.The operator is while seeing that the true form (SHAPE DETECTION value) that is shown in shape display device 10 is by air-operated device 7 operation air adjusting devices 84.
Next the action of shape control is described.
The working roller bending (WR bending) of bending control device 81 control working rolls 17 and the intermediate calender rolls bending (IMR bending) of intermediate calender rolls 18, the depressing position of depressing position control device 82 operation backing rolls 19.In addition, injection water or lubricated wet goods cooling medium change the heat hat of working roll 17 and change the distribution of the roll-force of plate width direction point cooling controller 83 partly from 94 pairs of working rolls 17 of nozzle.This WR bending, IMR bending, rectification, some cooling can be known, so detailed with the control mode of prior art.
Say that again the air that blows that the present invention is used in the air nozzle 95 of final frame 15 outlet sides carries out shape control.Air from a plurality of air nozzles 95 sprays control as follows.
(1) the overall flow of air is blown in change
In the part that is rolled material 2 (interval) of forced jet air, if because plate have the tendency of extension so the air mass flow of powerful injection air then plate width direction distributes the heterogeneity that becomes, the plate shape is extended partly sometimes thus.
While using the true form display unit 10 that shows from the SHAPE DETECTION value of SHAPE DETECTION device 4 to monitor the true forms air valve 85 homogeneous control panel shape whereby of regulating the overall flows of air so that the distribution of the air mass flow of plate width direction becomes.
(2) flow distribution of the plate width direction of air is blown in change
The tendency that the part of knowing the forced jet air by rule of thumb has the plate shape to extend, the part of weak tendency injection air has the tendency of not extending in addition.Utilize this character control shape.
In the shape actual value from SHAPE DETECTION device 4, in the occasion that local extension takes place, the extension of shape control apparatus 6 these parts of identification detects happening part is extended in the part of plate width direction.Shape control apparatus 5 operation air ejection control devices 84 reduce the air mass flow of the part of local extension generation.Local whereby extension reduces, and can obtain stable plate shape.
Though some cooling is carried out shape control by the working roll 17 that cooling illustrates the part of extension, the present invention becomes and extends (tension) material 2 that is rolled partly by cooling and come the control panel shape.
Deduct the shape desired value that provides by shape set device 6 according to SHAPE DETECTION value and obtain form variations Δ ε i from SHAPE DETECTION device 4.Here, i represents the interval (passage) in the SHAPE DETECTION device 4.Shape figure identification form variations Δ ε i is in WR bending, IMR bending, depress the component of s operation control in the rectification.
Deduct crooked and the operation result of correcting from form variations Δ ε i, extract by crooked and depress the form variations of the part that rectification can't remove.The form variations of fuzzy deduction computing part and computing air-operated amount.
The detailed formation of the example of one of shape control apparatus shown in Fig. 3.
Resolving into poor (X key element) with adjacent part (interval) by pre-treatment mechanism 53, carry out computing respectively with deviation (P key element) from the target shape of suitable part from the true form of SHAPE DETECTION device 4.
I-1, i, i+1 number form variations Δ ε i-1, Δ ε i, Δ ε i+1 is imported into the pre-treatment mechanism 53 of shape space deviation operational part 51.Pre-treatment mechanism 53 obtains the deviation of form variations Δ ε i-1 and Δ ε i and the deviation of form variations Δ ε i and Δ ε i+1 is added to classification mechanism 54A, 54B.The deviation that is added to classification mechanism 54A, 54B becomes the shape space deviation.
Classification mechanism 54A, 54B export certainty factor.The certainty factor of being obtained by two classification mechanism 54A, 54B is input to the 55A of inference mechanism, 55B respectively.The 55A of inference mechanism determines that according to the deviation of form variations Δ ε i-1 and Δ ε i control signal is added to evaluation portion 57 with reference to inference rule storehouse 56.In addition, the 55B of inference mechanism determines that according to the deviation of form variations Δ ε i and Δ ε i+1 control signal is added to evaluation portion 57 with reference to consequence rule storehouse 56.
On the other hand, be imported into the classification mechanism 54C of the shape absolute value deviation operational part 52 of P key element as the form variations Δ ε i of shape absolute value deviation.The 55C of inference mechanism determines that according to shape absolute value deviation delta ε i control signal is added to evaluation portion 57 with reference to consequence rule storehouse 56.The control signal of having carried out obtaining the evaluations such as center of gravity of fuzzy deduction computing in evaluation portion 57 is imported into air capacity operational part 58 and obtains the air-operated amount.
The routine details drawing of one of classification mechanism shown in Fig. 4 54.
Classification mechanism 54 has and is used for an input signal I (form variations signal) and is divided into the element of taxonomy 61,62,63 of a plurality of grades.Element of taxonomy 61 has the size of input signal I on the expression transverse axis, the classification function of the size of the certainty factor S of conduct output on the longitudinal axis.The classification function of element of taxonomy 61 represents that with solid line the classification function of other elements of taxonomy dots.
If the value of element of taxonomy 61 input signal I is a then represents that the value as the certainty factor S that exports is b.Equally, if the value of element of taxonomy 62 input signal I be a then represent that the value of certainty factor M as output is c, in addition, if the value of element of taxonomy 63 input signal I is a then represents that output valve is zero.
Since with like this according to target shape with detect shape absolute value deviation that shape obtains and shape space deviation and obtain from a plurality of air nozzles and be ejected into the air-operated amount that is rolled material, regulate the air capacity of spraying based on this air-operated amount, so can suppress the shape control that the shape defect of local extension or compound shape is rolled material accurately from a plurality of air nozzles.
Do not resolve clearly though can bring into play the reason of this effect, can roughly infer as follows.
Rolling temperature is generally carried out being higher than under the high temperature of room temperature, so can infer and cause following phenomenon because apply to a certain degree tension force at the milling train outlet side in addition.At rolling-mill housing 15 outlet sides, if chilling is rolled material 2 partly, the part of then being cooled off is shunk and the tension distribution increase of this part.
Because want high around the warp tension ratio of the part of being cooled off, this part by rolling especially, becomes the shape of extension.In addition, because the tension distribution height of the part of being cooled off so tension force causes extension, is batched as sieve up to plate then, the overall temperature of plate reduces, and the result becomes the extension shape.
Weaken local cooling of extending the part that takes place, reduce the tension distribution of this part, meanwhile reduce the directly drafts of below of milling train partly, shape just becomes on the tension direction favourable.
Fig. 5 illustrates the relation of air injection and true form.Fig. 5 is the true form that SHAPE DETECTION device 4 produces, and is the true form when drawing out air mass flow adjustment preceding (flow maximum) and adjustment back (flow 1/2).By increasing air mass flow, the plate shape of the rolling stock of air nozzle position is extended as can be seen.
If utilize the above-mentioned character that is rolled material, then pass through the air mass flow of the part of minimizing plate shape extension, increase the air mass flow of tension section, improve the plate shape and become possibility.
As above, the present invention is owing to use according to target shape and obtain the air-operated amount of spraying from a plurality of air nozzles with detecting the shape absolute value deviation that shape obtains with the shape space deviation, can suppress local and extends or the shape defect of compound shape and the shape that is rolled material is accurately controlled so regulate the air capacity of spraying from a plurality of air nozzles based on this air-operated amount.
In addition, if with the present invention then owing to can not need a cooling, so can eliminate the corrosion problem of the material after rolling or the problem that cooling agent concentration reduces.
Moreover, though being taken as by the fuzzy deduction computing, the foregoing description obtains the air-operated amount, obviously also can be undertaken by other computings.
If use the present invention, then because the plate shape of the part of control panel cross direction easily, so can be rolling on plate width direction the product of stable shape, the raising of shape of product precision becomes possibility.
Claims (8)
1. the shape control method of a cold-rolling mill, thereby by the SHAPE DETECTION mechanism that is disposed at the cold-rolling mill outlet side shape that is rolled the plate width direction of material being divided into to detect behind a plurality of intervals controls the described shape that is rolled material, it is characterized in that, the cold-rolling mill outlet side along the described plate width direction that is rolled material dispose a plurality of air nozzles and from described a plurality of air nozzles to the described injection of material air that is rolled, shape absolute value deviation and shape space deviation that utilization is obtained according to target shape and detection shape are obtained the air-operated amount of spraying from described a plurality of air nozzles, regulate the air capacity of spraying from described a plurality of air nozzles based on this air-operated amount.
2. the shape control method of cold-rolling mill according to claim 1, it is characterized in that, utilization is according to target shape and detect shape absolute value deviation that shape obtains and shape space deviation and carry out the fuzzy deduction computing and obtain the air-operated amount of spraying from described a plurality of air nozzles, the air capacity of regulating each injection in described a plurality of air nozzle based on this air-operated amount.
3. the shape control method of a cold-rolling mill, thereby by the SHAPE DETECTION mechanism that is disposed at the cold-rolling mill outlet side shape that is rolled the plate width direction of material being divided into to detect behind a plurality of intervals controls the described shape that is rolled material, it is characterized in that, the cold-rolling mill outlet side along the described plate width direction that is rolled material dispose a plurality of air nozzles and from described a plurality of air nozzles to the described injection of material air that is rolled, the form variations that utilization is obtained according to target shape and detection shape is obtained the air-operated amount of spraying from described a plurality of air nozzles, regulates the air capacity of spraying from described a plurality of air nozzles based on this air-operated amount.
4. according to the shape control method of each described cold-rolling mill in the claim 1～3, it is characterized in that described cold-rolling mill is the multi-stage rolling mill that has working roll and intermediate calender rolls, is the crooked controlled milling train of working roller bending and intermediate calender rolls.
5. the shape control apparatus of a cold-rolling mill is characterized in that possessing, the rolling cold-rolling mill that is rolled material; Be disposed at the outlet side of described cold-rolling mill, the described shape that is rolled the plate width direction of material be divided into the SHAPE DETECTION mechanism of detecting behind a plurality of intervals; Dispose along the described plate width direction that is rolled material at described cold-rolling mill outlet side, to the described a plurality of air nozzles that are rolled the injection of material air; Shape absolute value deviation and shape space deviation that utilization is obtained according to target shape and detection shape are obtained from the shape controlling organization of the air-operated amount of described a plurality of air nozzles injections; Thereby and import described air-operated amount and regulate from the air conditioning mechanism of the air capacity of described a plurality of air nozzles injections.
6. the shape control apparatus of cold-rolling mill according to claim 5, it is characterized in that the utilization of described shape controlling organization is according to target shape and detect shape absolute value deviation that shape obtains and shape space deviation and carry out the fuzzy deduction computing and obtain the air-operated amount of spraying from described a plurality of air nozzles; Thereby described air conditioning mechanism is imported the air capacity that described air-operated amount is regulated each injection from described a plurality of air nozzles.
7. the shape control apparatus of a cold-rolling mill is characterized in that possessing, the rolling cold-rolling mill that is rolled material; Be disposed at the outlet side of described cold-rolling mill, the described shape that is rolled the plate width direction of material be divided into the SHAPE DETECTION mechanism of detecting behind a plurality of intervals; Dispose along the described plate width direction that is rolled material at described cold-rolling mill outlet side, to the described a plurality of air nozzles that are rolled the injection of material air; The form variations that utilization is obtained according to target shape and detection shape is obtained from the shape controlling organization of the air-operated amount of described a plurality of air nozzles injections; Thereby and import described air-operated amount and regulate from the air conditioning mechanism of the air capacity of described a plurality of air nozzles injections.
8. according to the shape control apparatus of each described cold-rolling mill in the claim 5～7, it is characterized in that described cold-rolling mill is the multi-stage rolling mill that has working roll and intermediate calender rolls, is the crooked controlled milling train of working roller bending and intermediate calender rolls.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP204105/2002 | 2002-07-12 | ||
| JP2002204105A JP4128816B2 (en) | 2002-07-12 | 2002-07-12 | Method and apparatus for shape control of cold rolling mill |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1472018A CN1472018A (en) | 2004-02-04 |
| CN1228152C true CN1228152C (en) | 2005-11-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB031472850A Expired - Fee Related CN1228152C (en) | 2002-07-12 | 2003-07-11 | Cold-mill shape controlling method and apparatus |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP4128816B2 (en) |
| KR (1) | KR101016461B1 (en) |
| CN (1) | CN1228152C (en) |
| TW (1) | TWI279263B (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4170879B2 (en) * | 2003-10-27 | 2008-10-22 | ソリマチ株式会社 | Agricultural work record automation system |
| KR20060047984A (en) * | 2004-05-19 | 2006-05-18 | 신닛뽄세이테쯔 카부시키카이샤 | Method for using shape-detecting roll of metal strip |
| JP2006289420A (en) * | 2005-04-11 | 2006-10-26 | Hitachi Ltd | Method and apparatus for controlling rolled shape |
| JP4589850B2 (en) * | 2005-09-08 | 2010-12-01 | 株式会社日立製作所 | Rolling control device and rolling control method |
| JP4865598B2 (en) * | 2006-03-29 | 2012-02-01 | 古河電気工業株式会社 | Shape control method and shape control apparatus for cold rolled material |
| JP4823400B1 (en) * | 2010-03-31 | 2011-11-24 | 住友金属工業株式会社 | Hot rolled steel sheet manufacturing apparatus and manufacturing method |
| CN102371278B (en) * | 2010-08-26 | 2013-06-19 | 宝山钢铁股份有限公司 | Method for automatically controlling plate shape of continuous annealing leveling mill based on stability index |
| JP5677997B2 (en) * | 2012-03-05 | 2015-02-25 | 株式会社日立製作所 | Rolling control device, rolling control method, and rolling control program |
| CN105642679B (en) * | 2014-11-14 | 2019-04-23 | 宝山钢铁股份有限公司 | Steel-plate shape preliminary examination and initial temperature control method and device |
| TWI740494B (en) * | 2020-05-12 | 2021-09-21 | 中國鋼鐵股份有限公司 | Roll inspection method and roll inspection system |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6195708A (en) * | 1984-10-16 | 1986-05-14 | Ishikawajima Harima Heavy Ind Co Ltd | Shape control device of rolling sheet |
| JPH02247004A (en) * | 1989-03-20 | 1990-10-02 | Hitachi Ltd | Method and apparatus for controlling shape in rolling mill |
| JPH02255209A (en) * | 1989-03-30 | 1990-10-16 | Nippon Steel Corp | Shape control method for warm or cold rolling of sheet |
| JP2548818B2 (en) * | 1990-03-20 | 1996-10-30 | 株式会社日立製作所 | Rolling control device |
-
2002
- 2002-07-12 JP JP2002204105A patent/JP4128816B2/en not_active Expired - Fee Related
-
2003
- 2003-06-09 TW TW092115534A patent/TWI279263B/en not_active IP Right Cessation
- 2003-07-11 CN CNB031472850A patent/CN1228152C/en not_active Expired - Fee Related
- 2003-07-11 KR KR1020030047039A patent/KR101016461B1/en active IP Right Grant
Also Published As
| Publication number | Publication date |
|---|---|
| TW200406267A (en) | 2004-05-01 |
| TWI279263B (en) | 2007-04-21 |
| KR20040007320A (en) | 2004-01-24 |
| JP2004042108A (en) | 2004-02-12 |
| KR101016461B1 (en) | 2011-02-24 |
| CN1472018A (en) | 2004-02-04 |
| JP4128816B2 (en) | 2008-07-30 |
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Granted publication date: 20051123 Termination date: 20190711 |