JPH09295017A - Setup device for rolling mill - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shorten the off-gage length at the tip by raising the predictability of forward slip, to predict the slip between a material to be rolled during rolling and a roll and to prevent the slip in a setup device for a rolling mill having a sheet speedometer. SOLUTION: The actual value of rolling and the output value of tension control are inputted to a setup device 12 through a direct digital control(DDC) device 11 and the differnce between the actual value and calculated value of the forward slip is stored in a forward slip correcting factor storing memory 12e by a forward slip learning function 12d. A rolling schedule by which the slip is not generated is decided by next rolling setup function 12B using these data, the result is imparted to the DDC device. When the slip is generated during rolling, by changing a tension set value and the max. rolling speed by dynamic setup function 12C, the slip is suppressed. In case the slip is not prevented, roll changing is required to an operator through a speech output unit 13 and a CRT display device 14.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rolling mill setup device, and more particularly to a setup device that uses actual strip speed values in a cold rolling mill facility having a strip speed gauge.

[0002]

2. Description of the Related Art A strip thickness control system in a cold rolling mill facility is designed to obtain in advance the strip thickness at each stand, tension between stands, rolling load, roll speed, rolling position, etc. necessary to obtain a target finished strip thickness. It is composed of a setup system for predictive calculation, and a DDC of a plate thickness control system and a tension control system that corrects deviations of the plate thickness and tension during rolling from target values.

The roll speed prediction of a setup system is generally performed as described in, for example, "Theory and Practice of Sheet Rolling", Chapter 11.4 (published by Japan Iron and Steel Institute on September 1, 1984). The following method is used.

The amount of material to be rolled at each stand during rolling in a unit time is constant, which is called constant mass flow speed, and is expressed by equation (1).

Vi * hi = Vi + 1 * hi + 1 (1) where Vi: i stand output side plate speed hi: i stand output side plate thickness subscript i: i stand.

With the output side plate speed of the final stand set to an appropriate value, the output side plate speed of the preceding stand is sequentially obtained from the equation (1). The relationship between the plate speed and the roll speed is expressed by equation (2).

Vri = Vi / (1 + fi) (2) Here, Vri: Roll speed Vi: Plate speed fi: Advanced rate The advanced rate is represented by the equation (3) of Brand & Ford.

Fi = tan ² (0.5sin ^-1 (ri) -0.25hi / Rdi * ln (Hi / hi * (1-tfi / skfi) / (1-tbi / skbi)) (3) where R: Reduction ratio H: Inlet plate thickness h: Outlet plate thickness Rd: Flat roll radius tf: Outlet unit tension tb: Inlet unit tension skf: Inlet deformation resistance skb: Outlet deformation resistance Equation (2) and ( Calculate the roll speed from the formula 3), calculate the load on the rolling mill motor at this roll speed,
The maximum roll speed is determined so that the calculated load is within the motor rated value. The roll speed thus obtained is DD along with the delivery side plate thickness target value, the tension target value, the rolling position, etc.
C.

In the DDC, the setting of the rolling mill is changed based on the information provided by the setup system at the same time when the corresponding material arrives at the rolling mill. When the actual delivery side plate thickness deviates from the target value due to disturbance during rolling, the roll speed of the front stand is controlled by the plate thickness control to correct it. When the tension between the stands deviates from the target value, the rolling position is changed and corrected.

In a continuous rolling facility for welding materials to be rolled having different specifications and performing continuous rolling, how quickly the plate thickness change point from the current material being rolled to the next material is within a desired accuracy after passing through the stand. It is important to contain the plate thickness deviation. Since the thickness control of the DDC is turned off at the welding point where the target thickness value changes, the off-gauge length at the tip of the next material depends on the accuracy of the setup set value. At this time, the roll speed setting value and the rolling position setting value have the greatest influence on the plate thickness deviation among the set-up setting values.

On the other hand, when rolling is started and the target tension value is higher than the actual tension, the tension control operates to change the rolling position of the downstream stand where the inter-stand tension that needs to be corrected is applied (roll gap). Open) to increase the actual tension. As a result, the tension between stands matches the target value,
Due to the increased rearward tension, slippage between the roll surface and the plate easily occurs. Further, even when the roll is used for a long time, the roll surface is worn and slippage occurs. In the plate thickness control, the outlet plate thickness is controlled by changing the roll speed of the front stand, so if slip occurs in the front stand, the plate thickness cannot be controlled and the plate thickness deviation increases. .

In the conventional set-up system, the set values of the rolling reduction and the inter-stand tension of each stand are uniquely determined by a look-up method from a table classified by the steel type of the material to be rolled, the strip width and the finishing thickness. . Then, the rolling position is set from the rolling reduction set value, and the maximum roll speed is set from the predicted value of the advanced rolling rate obtained by the equation (3) using the tension set value and the capability of the roll driving device.

When a slip occurs during rolling, the operator closes the roll gap of the corresponding stand to reduce the tension on the entrance side and prevent the slip. Regarding the roll replacement timing, the rolling tonnage of the work roll is managed, and the operator performs roll replacement based on this value.

Further, in the setup system, the advanced rate predicted value calculated by the equation (3) has an error with respect to the actual advanced rate. As a conventional technique for correcting this error by learning, there is one disclosed in Japanese Patent Laid-Open No. 62-197210. In this conventional technique, the error between the advanced rate predicted value calculated by the formula (3) and the actual advanced rate error is corrected by learning, and the friction coefficient between the roll and the rolled material calculated using the corrected advanced rate predicted value is calculated. By calculating the rolling load of each stand in consideration, the opening degree of the rolling roll is controlled with high accuracy and stable rolling is performed. Note that, as other conventional techniques for learningally correcting the advanced rate, there are JP-A-58-135710, JP-A-2-258110, and the like.

[0015]

As described above, the important points in the setup data of the tip of the next material are the rolling position and the roll speed, but the predicted value of the advanced ratio calculated by (3) and the actual advanced ratio Therefore, the constant law of mass flow on the stand-out side of each stand breaks and the plate thickness on the exit side deviates from the target value, and the off-gauge length at the tip of the rolled material is not shortened. In the prior art disclosed in Japanese Patent Laid-Open No. 62-197210, the advanced rate prediction value calculated by the equation (3) is corrected by learning, but the maximum roll of only one data is set for one rolled material to be rolled. It is a method to obtain the predicted advanced rate at speed and feed it back to the setup calculation of the rolled material of the next coil by learning and correcting it.
In the transitional rolling state before the maximum roll speed immediately after passing the stand at the thickness change point from the current rolled material to the next rolled material during rolling, the error between the predicted advanced rate and the actual advanced rate is corrected. Therefore, the off-gauge length at the tip of the rolled material is not shortened.

Further, in the plate thickness control, if slip occurs, it becomes impossible to control the plate thickness, and the plate thickness accuracy deteriorates.
Whether slippage occurs depends on the rolling schedule such as rolling load, tension between stands, rolling speed, etc. and the degree of wear of the work roll surface.

In the conventional setup method, the rolling reduction of each stand and the tension between the stands are uniquely determined by the table lookup method from the steel type, strip width and strip thickness of the material to be rolled, and the maximum rolling speed is the roll. It was decided from the capability of the driving device, and there was no means to decide the rolling schedule from the viewpoint of preventing slip. Further, the conventional technique disclosed in Japanese Patent Laid-Open No. 62-197210 seeks to increase the rolling load calculation accuracy by obtaining the friction coefficient from the predicted advanced rate corrected by learning and does not prevent slip.

A first object of the present invention is to provide a rolling mill set-up apparatus for shortening the tip off-gauge length by increasing the prediction accuracy of the advanced rate.

A second object of the present invention is to provide a rolling mill set-up device for predicting and preventing a slip between a material to be rolled and a roll during rolling by increasing the prediction accuracy of an advanced rate. .

A third object of the present invention is to provide a rolling mill set-up device which automatically changes the tension and roll speed in order to eliminate the slip generated during rolling.

A fourth object of the present invention is to provide a rolling mill set-up device having a function of notifying an operator of the roll replacement timing based on the value of the advanced rate by increasing the accuracy of prediction of the advanced rate.

[0022]

In order to achieve the above first object, the present invention provides a rolling speed of a rolling mill, a plate speed of a material to be rolled, a performance value during rolling including a rolling load and a rolling phenomenon, In a rolling mill set-up device that determines the operating point of the rolling mill from the load distribution, the actual value of the advanced rate from the roll speed and strip speed during rolling, the theoretical value of the advanced rate from the data including the rolling load during rolling. Is calculated periodically, the advanced rate correction coefficient corresponding to each roll speed is obtained from the actual value and theoretical value of these advanced rates, and the advanced rate correction coefficient is stored in the table divided by each roll speed. The calculation means and the next rolling setup means for predicting the advanced rate of the next material by using the advanced rate correction coefficient stored in the table are provided.

Further, in order to achieve the above second object,
The present invention, in the above setup device, the next rolling setup means determines the presence or absence of slip using the predicted advanced rate, the reduction rate at which no slip occurs,
The roll speed and tension are set.

In order to achieve the third object,
The present invention, in the above-mentioned setup device, determines whether or not slippage of the current material has occurred from the actual value of the advanced ratio, and when it is determined that slippage has occurred, the tension on the rolling mill entrance side is set small, and The present invention further comprises a dynamic setup means for predicting the advanced rate of the current material being rolled using the advanced rate correction coefficient stored in the table and setting the roll speed at which slip does not occur using the predicted advanced rate.

Further, in order to achieve the fourth object,
According to the present invention, in the above setup device, when the rolling reduction, the roll speed, and the tension at which slip does not occur in the next rolling setup means cannot be set, it is determined that roll exchange is necessary, and a means for outputting a roll exchange request message is output. Is further provided.

In order to achieve the above-mentioned fourth object,
The present invention further comprises means for determining that roll replacement is necessary when the tension and roll speed at which slipping does not occur cannot be set in the dynamic setup means, and for outputting a roll replacement request message.

The wear of the roll surface is judged from the value of the predicted advance rate, and the operator is notified of the roll replacement time via a voice output device or a CRT display screen. By increasing the accuracy of the predicted advanced rate and determining the degree of roll wear, it is possible to accurately give the operator an instruction to replace the roll and prevent slipping.

In the above setup device, preferably, the dynamic advanced rate calculating means obtains the difference between the actual value and the theoretical value of the advanced rate as the advanced rate correction coefficient.

Further, preferably, the subsequent rolling setup means and / or the dynamic setup means determines that a slip has occurred when the predicted advance rate becomes negative.

The operation of the present invention configured as described above is as follows.

(1) In the present invention, the error of the roll speed set value has a great influence on the off-gauge length of the leading end of the next rolled material immediately after the change of the running gauge, and the change of the actual advanced ratio only by the theoretical formula. It is difficult to follow the above, and in the dynamic advanced rate calculation means, the advanced rate calculated value is periodically obtained during rolling under the same condition as the actual advanced rate actual value, and the error of the advanced rate prediction calculation is calculated. The accuracy of the predicted advanced ratio is improved by storing the roll speed and taking this error into consideration in the advanced ratio prediction calculation of the next material in the next rolling setup means. The current rolling state (roll surface roughness, coolant amount, etc.) and the advanced rate theoretical value are obtained by periodically learning the advanced rate during rolling and determining the difference between the theoretical value and the actual value for each roll speed. The difference between the actual value and the actual value can be recognized correctly.

(2) In order to prevent slippage during rolling, whether or not slippage will occur is predicted in the next rolling setup means from the value of the predicted advanced rate. If slippage is predicted, the rolling reduction rate, By correcting the tension and roll speed, a rolling schedule in which slip does not occur is determined. By setting the rolling schedule (reduction rate, tension) so that the predicted advanced rate becomes positive, it is possible to prevent slippage during rolling.

(3) Also, paying attention to the fact that slip occurs when the tension set value is not proper, the advanced rate actual value of each stand during rolling is monitored by the dynamic setup means, and this value becomes negative, for example. If it occurs, it is considered that slip has occurred, and the target tension value of the relevant stand and the upstream stand is changed. The slip can be eliminated by setting the entry-side tension target values of the stand where the slip has occurred and the upstream stand to be small. Also, focusing on the fact that the higher the roll speed, the smaller the friction coefficient, the smaller the advance rate and the more likely slippage occurs, and the maximum roll speed at which slip does not occur is determined from the predicted advance rate. Roll at less than speed. When a slip occurs, the friction coefficient increases by decreasing the roll speed, and the slip can be suppressed.

(4) Further, the wear of the roll surface is judged from the value of the predicted advanced rate, and the operator is instructed by a voice output device or C
Notify the roll replacement time via RT display screen. By increasing the accuracy of the predicted advanced rate and determining the degree of roll wear, it is possible to accurately give the operator an instruction to replace the roll and prevent slipping.

[0035]

An embodiment of the present invention will be described below in detail with reference to the drawings. In FIG. 1, reference numeral 1 is a rolling mill stand, and 2 is a material to be rolled. Rolling mill stand 1
Has a rolling load detector 3, a plate thickness measuring device 4, a plate speed detecting device 5, a tension measuring device 6, a motor rotation speed detecting device 7, and a rolling position detecting device 8. The rolling mill control device includes a speed control device 9 for controlling the roll rotation speed, a rolling down control device 10 for controlling the roll position, a DDC device 11 for performing plate thickness control and tension control, and a setup for giving a set value to the DDC device 11. A device 12, a voice output device 13 for transmitting information to an operator, a CRT (Cathode Ray Tube) display device 14,
The rolling schedule input device 15 is used.

The setup device 12 includes a dynamic advanced rate calculation function 12A, a next rolling setup function 12B,
Dynamic setup function 12C, alarm function 1
It has a 2D and steady rolling judgment function 12E.

The dynamic advanced ratio calculating function 12A is a result advanced ratio calculating unit 12a for periodically calculating the actual value of the advanced ratio from the roll speed and strip speed during rolling, and a load calculating unit 12b for calculating the rolling load during rolling. , An advanced rate logical calculation unit 12c that periodically calculates a theoretical value of the advanced rate from the data including the rolling load, and an advanced rate correction coefficient corresponding to each roll speed of the final stand from the actual value and the theoretical value of the advanced rate. The advanced rate learning unit 12d to be obtained and an advanced rate correction coefficient storage memory 12e that stores the advanced rate correction coefficient in a table divided by roll speeds.

The next rolling setup function 12B predicts the advanced rate of the next material by using the rolling schedule from the input device 15 and the advanced rate correction coefficient stored in the table of the storage memory 12e, and slips using the predicted advanced rate. It is determined whether or not is generated, and the rolling reduction, roll speed, and tension at which slip does not occur are set. The dynamic setup function 12C predicts the advanced rate of the current material being rolled using the advanced rate correction coefficient stored in the table of the storage memory 12e, and determines whether or not slip has occurred by using the predicted advanced rate.
Set the roll speed and tension at which slip does not occur. Alarm function 12D is the next rolling setup function 1
2B and the dynamic setup function 12C, when a set value at which slip does not occur cannot be obtained, it is determined that roll replacement is necessary, and a roll replacement request message is output to the voice output device 13 and the CRT display device 14. The steady rolling determination function 12E determines from the roll speed during rolling whether or not the current material is in steady rolling, and when it is determined to be in steady rolling, the next rolling setup function 12B is instructed to start the above calculation for the next material. .

A method of learning the advanced rate correction coefficient in the dynamic advanced rate calculation function 12A will be described.

Actual values measured by each detector (plate thickness,
The plate speed, roll peripheral speed, rolling load, tension between stands, and rolling position) are tracked by the DDC device 11,
A set of data on the same point (same stand) of the material to be rolled is periodically (every 1 second) taken in by the setup device 12. The actual advanced rate calculating unit 12a of the dynamic advanced rate calculating function 12A obtains the actual advanced rate from the formula (4) using the roll speed and the plate speed.

Fai = Voi / Vri−1.0 (4) Fai: Actual value of advanced rate Vri: Actual value of roll speed Voi: Actual value of plate speed Further, the rolling load is calculated by the load calculation unit 12b of the dynamic advanced rate calculation function 12A. Is calculated, and the advanced rate logical calculation unit 12 is calculated.
In c, the theoretical advance rate is calculated by the formula (3) using the flat roll radius calculated from the actual values of the inlet side plate thickness, the outlet side plate thickness, the inlet side tension, the outlet side tension, the roll speed, etc. and the rolling load. Calculate the difference from the actual value of the advanced rate by the following formula (5).

Coi = Fci−Fai (5) Coi: Advanced rate prediction error Fci: Advanced rate calculated value Fai: Advanced rate actual value Advanced rate prediction error Coi is constant with respect to the roll speed as seen from FIG. In particular, the change with speed becomes large especially in the case of thin plate rolling. Therefore, the advanced rate prediction error Coi
Is stored in a table divided by plate thickness and roll speed,
Used as an advanced rate correction coefficient when calculating the advanced rate. Further, in order to prevent the correction coefficient from becoming an abnormal value due to the variation of the advanced rate actual value, the smoothing process is performed by the equation (6) when stored in the table.

Coi (NEW) = (1−α) Coi + αCoi (IN) (6) Coi (NEW): Advanced rate correction coefficient (table update value) Coi: Advanced rate prediction error Coi (IN): Advanced rate Correction coefficient (existing value of table) α: Smoothing coefficient FIG. 3 shows the configuration of the advanced rate correction coefficient storage memory. In FIG. 3, the advanced rate correction coefficient Coi is stored in a table classified by each roll speed of the final stand. In the initial state in which the learning calculation of the advanced rate correction coefficient Coi at the time of roll exchange is not performed, an appropriate initial value is set in the table of FIG.
When rolling is started, it is cyclical (every 1 second) as described above.
The actual value is taken in and the advanced rate correction coefficient obtained by learning calculation is stored in a table.

Next, the slip prevention setup in the next rolling setup function 12B will be described.

The setup calculation flow is shown in FIG. After determining the exit side plate thickness of each stand, the tension between each stand, and the stand exit side plate speed (steps 100 to 102), the rolling load is calculated using Hill's theoretical formula (step 10).
3), the advanced rate is predicted and calculated using the following equation (7) (step 104).

Fi = Fci−Coi (7) Fi: Predicted advanced rate of next material Fci: Calculated advanced rate of next material, calculated by equation (3) Coi: Correction coefficient corresponding to roll speed of next material , The advanced rate correction coefficient Coi is obtained from the memory map shown in FIG. 3 by regarding the stand outgoing side plate speed as the roll speed. Then, the roll speed is calculated using the predicted advanced rate (step 105).

Next, it is judged from the predicted advanced rate whether or not slip has occurred (step 106). When the predicted advance ratio is positive, it is determined that slip has occurred, the rolling torque and the rolling position are calculated (steps 107 to 108), and the process ends. If the predicted advance rate is negative, it is determined that slip has occurred, and the reduction rate of the corresponding stand is first increased (steps 109 and 110) to perform recalculation. The rolling reduction amount is α% (constant) of the original rolling reduction. If the predicted advance rate after changing the reduction rate is still negative, then the rear unit tension of the relevant stand and the upstream stand is reduced (steps 111 and 112), and the advance rate is recalculated. The amount of tension correction is determined by the table lookup method. An example of the table structure at this time is shown in FIG. If the predicted advance rate does not become positive even if the rolling reduction and the tension are corrected, the maximum roll speed of the final stand is divided into three, and the roll speed is changed to 1/3 and 2/3 of the maximum roll speed (step 113). , 114), the predicted advanced rate is recalculated, and the roll speed having the positive predicted advanced rate and the higher speed is set as the roll speed set value. If the predicted advance rate becomes negative even at a roll speed of 1/3, a roll replacement request message is output to the CRT or the like to warn the operator (step 115).

Next, the dynamic setup function 12
The slip-prevention dynamic setup during rolling in C will be described using the calculation flow of FIG.

First, the achievement rate is calculated (step 20).
0), it is determined whether or not a slip has occurred based on the actual progress rate (step 201). If the actual advance rate becomes negative (less than a certain value), it is considered that slip has occurred. If a slip has occurred, it is checked whether the output of the tension control is in the direction of opening the roll gap (step 202). If the roll is closed, slippage occurs even though the roll is moving in the direction of increasing the advance rate, so the operator is notified via the voice output device and the CRT that the work roll of the corresponding stand has reached the end of its life. Exchange Request exchange (step 203). In the case of opening, slip may be improved by lowering the inlet tension setting value. For example, when slip occurs in the # 3 stand, the tension set value between # 2 and # 3, # 1
Improve the slip by lowering the tension set value between the # 2 stands and the tension between the # 1 and # 2 stands, the tension between the # 2 and # 3 stands, and the tension between the # 3 and # 4 in the case of the # 4 stand slip. It is possible. A tension correction amount is determined by table lookup using the output amount of tension control as a key (step 204), and the rolling load is calculated using this tension value (step 205). Figure 7 shows the tension correction amount table.
Shown in The newly calculated rolling load is α% of the original rolling load
If it becomes larger than the above, the tension is determined by using the correction amount which is one step smaller in the tension correction amount table (step 20).
7) Calculate the rolling load. When the rolling load falls within the allowable value, the tension value at this time is set as the tension set value of the actual material (step 212). Next, the tension and the roll speed during rolling are used to predict and calculate the advance rate (step 208). The advanced rate prediction calculation at this time is also performed using the theoretical value of the advanced rate and the advanced rate correction coefficient Coi stored in the memory map of FIG. Next, whether the predicted advance rate is positive or negative is determined (step 209), and when the predicted advance rate is negative, the roll speed is reduced (step 210). At this time, if the roll speed becomes equal to or lower than the minimum roll speed (step 21
1), a roll exchange request message is output to the operator (step 203). The minimum roll speed is a roll speed determined from the viewpoint of productivity. If it is equal to or higher than the minimum roll speed, the advanced rate is calculated again with the changed speed and the same check is performed, and the roll speed when the advanced rate becomes positive is set as the maximum roll speed set value of the actual material (step 21).
2).

FIG. 8 is a diagram for explaining the above-described slip preventing function during rolling. During rolling, using the formulas (4) to (6), the actual advanced ratio is calculated from the actual plate speed value and the actual roll speed value, and the advanced ratio is learned, and at the same time, the actual advanced value is determined. , It is determined whether or not slip has occurred. When the slip is occurring, the slip prevention function operates according to the flow of FIG. 6, the tension set value change amount or the roll speed change amount is set to the DDC device 11, and the slip during rolling is corrected. .

[0051]

【The invention's effect】

(1) According to the present invention, the advanced rate prediction accuracy at the tip of the next rolled material is improved, the roll speed setting accuracy is improved, the off-gauge length of the tip can be shortened, and the yield is improved.

(2) Since the occurrence of slip between the roll and the plate during rolling can be minimized, the control effect of the plate thickness control can be maximized, and the plate thickness control accuracy is greatly improved. It is possible.

[Brief description of drawings]

FIG. 1 is a view showing a setup device according to an embodiment of the present invention together with a rolling stand and a DDC device.

FIG. 2 is a diagram showing an error between an actual value of an advanced rate and a calculated value.

FIG. 3 is a diagram showing an advanced rate correction coefficient storage memory map.

FIG. 4 is a diagram showing a setup calculation flow in a next rolling setup function.

FIG. 5 is a diagram showing a memory map for storing a tension correction amount at the time of next rolling setup.

FIG. 6 is a diagram showing a setup flow when a slip occurs during rolling in the dynamic setup function.

FIG. 7 is a diagram showing an advanced rate correction coefficient storage memory map at the time of dynamic setup.

FIG. 8 is a diagram showing a slip prevention function during rolling.

[Explanation of symbols]

 1: i-stand rolling mill 2: rolled material 3: rolling load detector 4: strip thickness gauge 5: strip speed gauge 6: tension detector 7: motor speed detector 8: rolling position detector 9: speed control device 10: Reduction control device 11: DDC device 12: Setup device 13: Audio output device 14: CRT display device 12A: Dynamic advanced rate calculation function 12B: Next rolling setup function 12C: Dynamic setup function 12D: Alarm function 12a: Actual advanced rate Calculation unit 12b: Load calculation unit 12c: Advanced rate logic calculation unit 12d: Advanced rate learning unit 12e: Advanced rate correction coefficient storage memory 12e

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Kenichi Yoshioka, 5-2-1 Omika-cho, Hitachi-shi, Ibaraki Prefecture Hitachi Information Control System Co., Ltd. (72) Inventor Takashige Watanabe, 5 Omika-cho, Hitachi-shi, Ibaraki 2-2-1, Inc., Hitachi Information Control System Co., Ltd. (72) Inventor, Yasunori Katayama 5-2-1, Omika-cho, Hitachi City, Ibaraki Prefecture 72-Inventor Company Hitachi Information Control System (72), Yutaka Saito, Ibaraki Prefecture Hitachi Municipal Omika-cho 5-2-1 Co., Ltd. Hitachi Ltd. Omika Plant (72) Inventor Kazuhiro Hirohata Okayama Prefecture Kurashiki City Mizushima Kawasaki Dori 1 Kawasaki Steel Co., Ltd. Mizushima Steel Works (72) Inventor Shunji Goto Okayama Prefecture 1 Mizushima Kawasaki Dori, Kurashiki City Kawasaki Steel Co., Ltd. Mizushima Works Ltd. (72) Inventor Mizushima Adult 1 Mizushima Kawasaki Dori, Kurashiki City, Okayama Prefecture Saki in Steel Co., Ltd. Mizushima Works

Claims (8)

[Claims] 1. A rolling mill set-up device for determining an operating point of the rolling mill from a roll speed of the rolling mill, a plate speed of a material to be rolled, an actual value during rolling including a rolling load, a rolling phenomenon, and load distribution, The actual value of the advanced rate from the roll speed and the sheet speed during the rolling, the theoretical value of the advanced rate is calculated periodically from the data including the rolling load during rolling, respectively, and each from the actual value and the theoretical value of these advanced rates. Obtaining an advanced ratio correction coefficient according to the roll speed, and using the advanced ratio correction coefficient stored in the table, a dynamic advanced ratio calculation means for storing the advanced ratio correction coefficient in a table divided by each roll speed A rolling mill setup device comprising: a next rolling setup means for predicting an advanced rate. 2. The rolling mill setup apparatus according to claim 1, wherein the next rolling setup means determines whether or not slip has occurred by using the predicted advanced rate, and a reduction rate, a roll speed, and a rolling rate at which no slip occurs. A rolling mill setup device characterized by setting tension. 3. The rolling mill set-up device according to claim 1, wherein the presence or absence of slippage of the actual material is judged from the actual value of the advanced ratio, and when it is judged that slippage has occurred, the rolling mill entrance side is judged. A dynamic setup means for setting a small tension, predicting an advanced rate of the current material being rolled using the advanced rate correction coefficient stored in the table, and setting a roll speed at which slip does not occur using the predicted advanced rate A rolling mill setup device further comprising: 4. The rolling mill setup apparatus according to claim 1, wherein when the rolling reduction, the roll speed and the tension at which slip does not occur in the next rolling setup means cannot be set, it is determined that the roll needs to be replaced, A rolling mill setup device, further comprising means for outputting a replacement request message. 5. The rolling mill setup apparatus according to claim 3, wherein when the tension and the roll speed at which slip does not occur in the dynamic setup means cannot be set, it is determined that roll replacement is necessary, and a roll replacement request message is issued. A rolling mill set-up device further comprising means for outputting. 6. The rolling mill set-up device according to claim 1, wherein the dynamic advanced ratio calculation means obtains a difference between a past actual value and a theoretical value of the advanced ratio as the advanced ratio correction coefficient. Rolling mill setup device. 7. The rolling mill setup device according to claim 2, wherein the next rolling setup means and / or the dynamic setup means slips when the actual advance rate and / or predicted advance rate becomes negative. A rolling mill setup device characterized by being determined to have occurred. 8. A rolling mill set-up device for determining an operating point of the rolling mill from a roll speed of the rolling mill, a plate speed of a material to be rolled, an actual value during rolling including a rolling load, a rolling phenomenon, and load distribution, The actual value of the advanced rate from the roll speed and the plate speed during the rolling, the theoretical value of the advanced rate is calculated periodically from the data including the rolling load during rolling, respectively, at least from the actual value and the theoretical value of these advanced rates. Dynamic advanced rate calculation means for obtaining an advanced rate correction coefficient according to the roll speed and storing the advanced rate correction coefficient in a table classified by roll speed, and whether or not slippage of the actual material occurs from the actual value of the advanced rate. If it is judged that slip has occurred, the tension on the inlet side of the rolling mill is set to a small value and the advanced rate correction coefficient stored in the table is used to determine the advanced rate of the current material being rolled. Measuring to, rolling mill setup apparatus; and a dynamic set-up means for setting a roll speed causing no slip using the predictive forward slip.