WO2006123394A1 - 板厚制御装置 - Google Patents
板厚制御装置 Download PDFInfo
- Publication number
- WO2006123394A1 WO2006123394A1 PCT/JP2005/008898 JP2005008898W WO2006123394A1 WO 2006123394 A1 WO2006123394 A1 WO 2006123394A1 JP 2005008898 W JP2005008898 W JP 2005008898W WO 2006123394 A1 WO2006123394 A1 WO 2006123394A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- roll
- rolling
- rolling load
- plate thickness
- rotation
- Prior art date
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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
- 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
- B21B37/66—Roll eccentricity compensation systems
-
- 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 present invention relates to a sheet thickness control device in a rolling mill of a metal material, and in particular, a sheet thickness for controlling a variation in sheet thickness caused by a so-called roll eccentricity generated in relation to a rotational position of a rolling roll or the like.
- the present invention relates to a control device.
- the thickness control method includes a monitor AGC that feeds back the measured value of the thickness gauge installed on the exit side of the rolling mill, and a gauge meter AG C (Gage meter AGC that uses the estimated gauge meter thickness for rolling load and roll gap force: GM—AGC), Mill Modulus Control (MMC) by rolling load.
- AGC Automatic Gage Control
- MMC Mill Modulus Control
- roll eccentricity is taken up.
- Roll eccentricity mainly causes shaft runout when subjected to a rolling load of 2 to 3,000 tons of keyway force for injecting oil in the oil bearing of the support roll.
- the roll gap fluctuates.
- a roll gap variation depending on the roll rotation occurs for some other reason.
- the rolling roll is the work roll (Work Roll: WR), support roll as roll other than roll, backup roll (
- roll eccentricity control In order to reduce disturbances such as roll eccentricity that depend on roll shaft runout, roll eccentricity control is conventionally performed. The following two methods are known for roll eccentricity control.
- Patent Document 1 Japanese Patent No. 1596084 (Japanese Patent Publication No. 2-18170)
- Patent Document 2 Japanese Patent No. 1814074 (Japanese Patent Publication No. 5-21651)
- Patent Document 3 JP 2002-282917 A
- the cause of the roll eccentricity may not be specified.
- roll eccentricity is often caused by a support roll, but it can also occur due to the polishing state of the rolling roll.
- the load fluctuation component generated in relation to the roll rotation position is a sine wave.
- the lowest order frequency the frequency component that is twice or more than the so-called fundamental frequency may appear, and it is difficult to reduce the frequency disturbance.
- the amplitude of the load fluctuation detected in the kiss roll state is different from the amplitude of the load fluctuation detected during rolling.
- a rolling mill to which the control of method (B) can be applied must have a thickness gauge installed on the exit side.
- a thickness gauge installed on the exit side.
- variations in thickness due to roll eccentricity of the subsequent 5, 6 and 7 stands tend to appear as product thickness variations.
- the rolling material speed can be calculated by taking into consideration the advance rate in the roll peripheral speed, but the advanced rate is an estimated value with respect to the roll peripheral speed that can be measured, and includes errors. For this reason, errors are included in the rolling material speed, and tracking errors are likely to occur.
- the gauge meter plate thickness is calculated to estimate the outlet plate thickness of the rolling stand, and this thickness is controlled to match the target value.
- the gauge meter plate thickness cannot be calculated correctly! The reason is as follows. For example, if the roll gap is opened due to roll eccentricity or the like, the actual exit thickness is increased, but the rolling load is reduced because the roll gap is opened. For this reason, in calculating the gauge meter plate thickness, the mill elongation becomes smaller and the gauge meter plate thickness becomes smaller. This will be explained by the following gauge meter formula (1).
- the calculated gauge meter thickness is estimated exactly oppositely to the influence of a change in rolling load related to the roll rotation position such as roll eccentricity.
- the present invention has been made in consideration of the above-mentioned points, and can control a variable component that cannot be analyzed by frequency analysis, and does not require a plate thickness meter and does not cause a decrease in accuracy due to a tracking error.
- An object is to provide an accurate plate thickness control device.
- Rolling load fluctuation calculating means for recording From the rolling load and rotation position of the roll, calculate the fluctuation component of the rolling load generated in relation to the rotation position of the roll, and add the calculated fluctuation component of the rolling load for each rotation position of the roll.
- a rolling roll gap command value that reduces sheet thickness fluctuation is calculated and selected according to the rotation of the roll.
- Manipulated variable calculation means for outputting the rolling roll gap command value at the same timing
- Roll gap operating means for operating the rolling roll gap of the rolling stand based on the rolling roll gap command value from the operation amount calculating means
- a plate thickness control device comprising: Is to provide.
- the present invention records the rotation position of the rolling roll or the support roll in association with the fluctuation component of the rolling load, and uses the fluctuation component of the rolling load for each rotation position of the roll to
- the roll roll gap command value that reduces the thickness fluctuation is obtained, and the roll roll gap is manipulated by this roll roll gap.
- Control results can be obtained.
- fluctuation components that cannot be analyzed by frequency analysis can be calculated and controlled, and a plate thickness meter is not required for the equipment structure, and control can be realized without any deterioration in accuracy due to tracking errors.
- the accurate gauge meter plate thickness can be obtained by performing the correction according to the present invention. Can do. For this reason, the AGC function that uses the gauge meter plate thickness is more accurate and the plate thickness accuracy is improved.
- FIG. 1 is a diagram showing the overall configuration of an embodiment of the present invention.
- FIG. 2 is a diagram showing the concept of rolling load in one embodiment of the present invention.
- FIG. 3 is a diagram showing the relationship between the circumferential length division of the support roll used in the present invention and the rolling roll.
- FIG. 4 is a diagram showing an example of a method for calculating a rolling load fluctuation due to roll eccentricity or the like in a support roll.
- FIG. 5 is a view showing another example of a method for calculating a rolling load fluctuation due to roll eccentricity or the like in a support roll.
- FIG. 6 is a block diagram showing in detail the configuration of the embodiment shown in FIG.
- FIG. 7 is a characteristic diagram of actual measurement results of control according to the present invention.
- FIG. 1 shows the overall configuration of the first embodiment of the present invention.
- a rolled material 1 is placed in the center of a rolling mill housing 2 and rolled by upper and lower rolling rolls 3 with appropriately adjusted gaps and speeds, and reaches a desired thickness on the exit side. .
- the rolling roll 3 is supported by a support roll 4 provided behind, so that the sag in the roll width direction is reduced.
- the support roll 4 is supported by the rolling mill housing 2 and rolled.
- the structure can withstand the rolling load for rolling the material 1.
- the gap between the upper and lower rolling rolls 3 is adjusted by a reduction device 5.
- reduction devices 5 There are two types of reduction devices 5, one based on motor control (referred to as electric pressure reduction) and one based on hydraulic control (referred to as hydraulic pressure reduction). The latter is easier to obtain a high-speed response.
- electric pressure reduction motor control
- hydraulic pressure reduction hydraulic pressure reduction
- the rolling load detector 6 is embedded between the rolling mill housing 2 and the reduction device 5 and uses a load cell (LC) that directly measures the rolling reaction force, or a load that is calculated backward from the pressure detection force under hydraulic pressure. .
- LC load cell
- the rotation of the rolling roll 3 is detected by a roll rotation number detector 7.
- the roll rotation speed detector 7 is attached to the shaft of a rolling roll 3 or an electric motor (not shown) that drives the rolling roll 3 and detects the rotation speed of the rolling roll 3.
- the support roll 4 provided behind the rolling roll 3 is provided with a roll reference position detector 8, and each time the support roll 4 rotates once, the reference position is detected by a proximity switch or the like.
- a roll gap detector 9 is installed between the support roll 4 and the reduction device 5 to indirectly detect the gap of the rolling roll 3.
- FIG. 2 is a diagram showing the concept of the measured rolling load. A method for calculating the rolling load fluctuation will be described with reference to FIG.
- rolling load fluctuation components other than roll eccentricity for example, rolling load fluctuations caused by temperature change, thickness change, etc., are superposed on rolling load fluctuation components due to eccentricity become.
- FIG. 3 shows the relationship between the circumferential length division of the support roll 4 (BUR) and the rolling roll 3 (WR).
- BUR circumferential length division of the support roll 4
- WR rolling roll 3
- the position of the rolling roll 3 is 0 wo is the rolling roll position corresponding to the reference position of the supporting roll 4, and ⁇ w is the supporting roll after the rolling roll 3 and the supporting roll 4 are simultaneously rotated. This is the position corresponding to position ⁇ of 4.
- a sensor such as a proximity switch is embedded in one place of the support roll 4, and the roll reference position detector 8 is installed at the reference position of the position scale that does not rotate. Then, when a sensor such as a proximity switch provided at one place of the support roll 4 reaches a reference position on a position scale that does not rotate, it can be recognized that the support roll 4 has passed the reference position.
- FIG. 4 shows an example of how the rolling load fluctuates with a change in the rotation position of the support roll, and a method for calculating the rolling load fluctuation due to the eccentricity of the center.
- the horizontal axis indicates the position of the support roll (BUR) that changes with time
- the vertical axis indicates the rolling load.
- the change in rolling load during two rotations of the support roll BUR appears as two peaks and two valleys.
- Roll position 1 (time T) is rolling load P
- support roll position 2 (time T) is rolling.
- the rolling load varies depending on the position of the support roll.
- ⁇ ⁇ is connected by a straight line, and this straight line is the rolling load excluding rolling load fluctuation due to roll eccentricity etc.
- the rolling load fluctuation due to roll eccentricity or the like accompanying the rotation of the support roll is the difference between the measured rolling loads ⁇ , ⁇ , ⁇ , ⁇ ,. ⁇ ,,
- ⁇ ⁇ , ⁇ ⁇ , ⁇ ⁇ , 0 can be calculated.
- FIG. 5 shows another example of how the rolling load P changes with the change in the rotation position of the support roll and another method for calculating the rolling load fluctuation due to roll eccentricity or the like.
- the load P may be unclear and difficult to identify.
- the difference from the value can be regarded as a rolling load fluctuation due to roll eccentricity or the like.
- the advantage of this method is that it is resistant to fluctuations due to noise and the like if the actual value of the rolling load is collected up to the ( ⁇ -1) section.
- the actual rolling load value may be filtered to further reduce the effects of noise.
- FIG. 6 shows a roll that determines the operation amount by calculating the roll gap operation amount using the rolling load value at each position of the support roll calculated by the rolling load fluctuation calculation means 11 (FIG. 1).
- 1 shows the configuration of a plate thickness control device equipped with a gap operating means 12 (FIG. 1).
- the load detection signal ⁇ ⁇ ⁇ ⁇ force is determined in the rolling load holding means 111 for each position 0, 1, 2,.
- the limiter LM1 receives the output of the subtractor 113, checks the upper and lower limits, and sends it to the adder ⁇ via the switch SS.
- the output of the adder ⁇ is sent to the roll gap operation means 12 through the switch SW and the gate G as a rolling load deviation ⁇ ⁇ .
- the roll gap operating means 12 the roll gap is corrected based on the given deviation ⁇ .
- Fig. 6 shows a device configuration that uses the average value shown in Fig. 5, and this device uses the linear interpolation between the start point and the end point shown in Fig. 4 and roll eccentricity. Can be easily applied to the calculation of rolling load fluctuations
- the rolling load holding means 111 includes rolling loads P 1, ⁇ , ⁇ ,..., ⁇ ,. Hold, ⁇ , ⁇ for one rotation of the support roll
- the difference from n-1 may be calculated.
- the adder ⁇ ⁇ is cleared to zero before the rolled material is rolled, and each time the support roll rotates once and the calculation of the average value is completed, the deviation of the rolling load is added each time. This procedure is performed by limiter LM1, switch SS and adder IV.
- the switch SW takes out the rolling load deviation added one by one according to the rotation position of the support roll from the adder. For example, looking at the reference position 0, when the support roll passes the reference position 0, only the switch SW is turned on and the rolling load deviation from the adder ⁇ is turned on.
- the addition at each position can be easily derived from a general control law force. That is, when there is no integral system in the controlled object as in the controlled object of the present invention, it is also appropriate to add an integrator on the controller side to remove the steady deviation from the control law. Since the control target is a discrete value system that is not a continuous system, it is an adder rather than an integrator.
- the roll gap correction amount which is the operation amount, is calculated by the following equation (5) in the roll gap operation means 13 (FIG. 1) that compensates the rolling load fluctuation value due to roll eccentricity or the like.
- the roll gap operating means 13 checks the upper and lower limits of the low gap correction amount AS according to the above formula (5) with the limiter LM2, and then adjusts it to the roll gap amount such as MMC or GM-AGC. ( Figure 1).
- the time delay may not be ignored.
- the response under hydraulic pressure is 100% when the cutoff frequency is 60 radZsec, the time to reach 95% is 0.05 sec.
- One rotation of the support roll is 0.5 ⁇
- the 0.05 second time delay hits 1Z10 to 1Z20, so it may have a significant impact.
- this problem can be solved by advancing the timing of outputting the roll gap correction amount in the operation amount calculation means 12. For example, when the number of divisions n force in FIG. 3 is 0 and one rotation of the support roll is 0.8 seconds, the time to advance from one position to the next position is 0.02 seconds. At this time, if there is a time delay of 0.05 seconds, a roll gap correction amount is given to the roll gap operating means 13 ahead of 2.5 rotations.
- FIG. 7 shows the effect of the reduction control according to the present invention. It can be seen that when the control according to the present invention is on, the fluctuation of the rolling load is small, and after it is off, the fluctuation is large.
- a force rolling roll based on the rotation of the support roll may be used as a reference.
- the true plate thickness is calculated by the following equation (6), and the influence due to the rolling load fluctuation due to roll eccentricity can be separated.
- the rolling load fluctuation due to roll eccentricity is compensated 100% (the compensation amount is AS
- the roll gap (command value or actual value) compensated according to the present invention is considered in consideration of the index r indicating the effect of the present invention.
- the index r indicating the effect of the present invention.
- the present invention is capable of controlling fluctuation components that cannot be analyzed by frequency analysis when performing plate thickness control of a rolling mill, and does not require a force plate thickness meter and does not cause deterioration in accuracy due to tracking errors.
- a control device is provided.
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Abstract
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Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2005800078081A CN1933926B (zh) | 2005-05-16 | 2005-05-16 | 板厚控制装置 |
JP2006520613A JP4673848B2 (ja) | 2005-05-16 | 2005-05-16 | 板厚制御装置 |
PCT/JP2005/008898 WO2006123394A1 (ja) | 2005-05-16 | 2005-05-16 | 板厚制御装置 |
Applications Claiming Priority (1)
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PCT/JP2005/008898 WO2006123394A1 (ja) | 2005-05-16 | 2005-05-16 | 板厚制御装置 |
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WO2006123394A1 true WO2006123394A1 (ja) | 2006-11-23 |
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PCT/JP2005/008898 WO2006123394A1 (ja) | 2005-05-16 | 2005-05-16 | 板厚制御装置 |
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JP (1) | JP4673848B2 (ja) |
CN (1) | CN1933926B (ja) |
WO (1) | WO2006123394A1 (ja) |
Cited By (5)
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WO2011132273A1 (ja) * | 2010-04-21 | 2011-10-27 | 東芝三菱電機産業システム株式会社 | 板厚制御装置、板厚制御方法、板厚制御プログラム |
WO2012070099A1 (ja) * | 2010-11-22 | 2012-05-31 | 東芝三菱電機産業システム株式会社 | 圧延機の制御装置 |
JP2012152808A (ja) * | 2011-01-27 | 2012-08-16 | Jfe Steel Corp | 熱間圧延ラインにおけるロール制御方法 |
CN103817154A (zh) * | 2014-01-24 | 2014-05-28 | 宁波钢铁有限公司 | 一种提高花纹板基板厚度控制精度的方法 |
JP2020037124A (ja) * | 2018-09-05 | 2020-03-12 | 株式会社Uacj | 制御装置及び制御方法 |
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JP5131270B2 (ja) * | 2007-04-12 | 2013-01-30 | 東芝三菱電機産業システム株式会社 | リバース式圧延機の板厚制御装置 |
JP4991576B2 (ja) * | 2008-01-08 | 2012-08-01 | 株式会社日立製作所 | 板厚制御システム |
KR101208811B1 (ko) * | 2008-05-07 | 2012-12-06 | 도시바 미쓰비시덴키 산교시스템 가부시키가이샤 | 압연기의 판 두께 제어 장치 |
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JP5818511B2 (ja) * | 2011-05-25 | 2015-11-18 | 株式会社神戸製鋼所 | 自動板厚制御方法 |
JP5949658B2 (ja) * | 2013-05-20 | 2016-07-13 | 東芝三菱電機産業システム株式会社 | 通板設備の制御システム |
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 |
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CN112139252A (zh) * | 2020-09-01 | 2020-12-29 | 南京钢铁股份有限公司 | 一种针对加热后水梁印的轧件厚度优化控制方法 |
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- 2005-05-16 CN CN2005800078081A patent/CN1933926B/zh active Active
- 2005-05-16 JP JP2006520613A patent/JP4673848B2/ja active Active
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JP2002282917A (ja) * | 2001-03-28 | 2002-10-02 | Toshiba Corp | 圧延機の板厚制御装置 |
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KR101414871B1 (ko) | 2010-04-21 | 2014-07-03 | 도시바 미쓰비시덴키 산교시스템 가부시키가이샤 | 판두께 제어 장치, 판두께 제어 방법, 판두께 제어 프로그램이 기록된 기록매체 |
AU2010351732B2 (en) * | 2010-04-21 | 2015-03-05 | Toshiba Mitsubishi-Electric Industrial Systems Corporation | Gage controller, gage control method, and gage control program |
JP5637637B2 (ja) * | 2010-04-21 | 2014-12-10 | 東芝三菱電機産業システム株式会社 | 板厚制御装置、板厚制御方法、板厚制御プログラム |
WO2011132273A1 (ja) * | 2010-04-21 | 2011-10-27 | 東芝三菱電機産業システム株式会社 | 板厚制御装置、板厚制御方法、板厚制御プログラム |
CN103221159A (zh) * | 2010-11-22 | 2013-07-24 | 东芝三菱电机产业系统株式会社 | 轧机的控制装置 |
KR101435760B1 (ko) | 2010-11-22 | 2014-08-28 | 도시바 미쓰비시덴키 산교시스템 가부시키가이샤 | 압연기의 제어 장치 |
JP5598549B2 (ja) * | 2010-11-22 | 2014-10-01 | 東芝三菱電機産業システム株式会社 | 圧延機の制御装置 |
WO2012070099A1 (ja) * | 2010-11-22 | 2012-05-31 | 東芝三菱電機産業システム株式会社 | 圧延機の制御装置 |
US9242283B2 (en) | 2010-11-22 | 2016-01-26 | Toshiba Mitsubishi-Electric Industrial Systems Corporation | Control apparatus of rolling mill |
JP2012152808A (ja) * | 2011-01-27 | 2012-08-16 | Jfe Steel Corp | 熱間圧延ラインにおけるロール制御方法 |
CN103817154A (zh) * | 2014-01-24 | 2014-05-28 | 宁波钢铁有限公司 | 一种提高花纹板基板厚度控制精度的方法 |
JP2020037124A (ja) * | 2018-09-05 | 2020-03-12 | 株式会社Uacj | 制御装置及び制御方法 |
JP7103896B2 (ja) | 2018-09-05 | 2022-07-20 | 株式会社Uacj | 制御装置及び制御方法 |
Also Published As
Publication number | Publication date |
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CN1933926A (zh) | 2007-03-21 |
JPWO2006123394A1 (ja) | 2008-12-25 |
CN1933926B (zh) | 2011-08-17 |
JP4673848B2 (ja) | 2011-04-20 |
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