KR101192476B1 - Control device, control method and control pattern making method for continuous finishing mill - Google Patents

Abstract

The subject of this invention suppresses generation | occurrence | production of the board | substrate trouble resulting from the reduction of a rolling speed, and also makes the control apparatus, control method, and control pattern of the finishing continuous rolling mill which can control the temperature of a to-be-rolled material according to the reduction of a rolling speed. To provide a way.
The speed monitoring device 11 for monitoring the rolling speed of the rolled material 100 in real time, and each time the rolled material 100 is conveyed in the finishing continuous rolling mill 20 for a predetermined length, the rolled finished stand is rolled. The calculating device 12 which calculates the deceleration start timing which starts deceleration, and the finishing continuous rolling mill 20 so that deceleration is started in deceleration start timing so that a rolling speed may become a tail end pull-out speed when 100 exits. Temperature control of the rolled material 100 by the finishing continuous rolling mill 20 to compensate for the temperature change of the speed control device 13 and the rolled material 100 caused by the deceleration. It is provided with the temperature control apparatus 14 to control.

Description

CONTROL DEVICE, CONTROL METHOD AND CONTROL PATTERN MAKING METHOD FOR CONTINUOUS FINISHING MILL}

This invention relates to the control apparatus, control method, and control pattern preparation method of the finishing continuous rolling mill which have several rolling stand.

The finishing continuous rolling machine in which several rolling stands were arrange | positioned continuously is used for a hot rolling line etc. In a finish continuous rolling mill, it is necessary to ensure the sheet | seat stability of the tail end part of a to-be-rolled material, in order to avoid the board | plate troubles, such as meandering, perforation, and cutting of a to-be-rolled material. For this reason, the speed (henceforth "rolling speed") which a to-be-rolled material moves in a finishing continuous rolling mill is controlled. Specifically, the rolling speed (hereinafter referred to as "tail end pull-out speed") when the rolled material exits the rolling stand of the final stage of the finish continuous rolling mill and the rolling speed has been decelerated to the tail end pull-out speed. It is preferable that the tail end position (hereinafter, referred to as "deceleration completed position") of the rolled material at the time is fixed to a set value. The behavior of the rolling speed of the to-be-rolled material provided at this tail end detachment speed and the deceleration completion position is referred to as "tail end deceleration pattern" below.

It is preferable to slow down the slowdown start timing of a rolling speed as much as possible from a productivity viewpoint of a product. This is because, as the deceleration start timing is delayed, the rolling distance of the rolled material due to the high rolling speed becomes longer, and the time required for rolling the rolled material from the tip to the tail end becomes shorter. Moreover, since the temperature of a to-be-rolled material falls by deceleration of a rolling speed, it is preferable to slow down as much as possible the timing of start of deceleration of a rolling speed as much as possible even in order to lengthen the range which keeps material temperature constant.

On the other hand, when the deceleration start timing of a rolling speed is slow, when a tail end of a to-be-rolled material exits a finishing continuous rolling mill, a rolling speed may not fully be decelerated to a desired tail end removal speed. In this case, a board | substrate trouble generate | occur | produces in terms of an orthogonal axis. Moreover, when the deceleration of a to-be-rolled material is abrupt, temperature control using cooling spray etc. cannot compensate for the temperature fall of a to-be-rolled material, and quality problems, such as lack of temperature precision, arise.

Therefore, the tail end deceleration pattern is calculated for the prevention of plate trouble, quality control, and the like, and the deceleration start timing is determined.

Generally, at the time when the to-be-rolled material reaches a predetermined position on the introduction side of the finishing continuous rolling mill, for example, at the time of introduction side thermometer passing, the tail end deceleration pattern is calculated to determine the deceleration start timing of the rolling speed. And a rolling speed is controlled based on the speed command pattern to which the deceleration start timing etc. were specified.

However, when the tail end deceleration pattern is calculated on the introduction side of the finishing continuous rolling mill, the rolling speed is set when the tail end deceleration pattern is calculated and the rolling speed is changed after the dynamic control. Differences may arise in the performance value of a rolling speed. According to the difference of this rolling speed, an error occurs in the timing of completion of deceleration centering on the tail end of the to-be-rolled material. For this reason, when a situation is bad, the board | substrate trouble in the tail end of the to-be-rolled material often occurred.

For this reason, the strip remaining length in the finishing mill was obtained in real time on the basis of the tail end missing signal informing that each of the rolling stands passed through the tail end of the rolled material, and based on the strip remaining length and the speed performance value, A method of correcting the deceleration rate has been proposed (see Patent Document 1, for example).

Japanese Patent Laid-Open No. 4-13407

However, in the above proposed method, the deceleration stand at which the deceleration of the rolling speed is completed is predetermined, and the deceleration rate must be changed under such conditions. Therefore, generation | occurrence | production of a board | plate trouble cannot be suppressed when the reduction rate of a rolling speed exceeds the limit of a facility. In addition, high computational precision is also required for the tail end missing signal used to obtain the strip residual length.

In general, the calculation of the tail end deceleration pattern is performed independently of the temperature control. Therefore, it cannot be said that temperature control of the to-be-rolled material which arises by slowdown of a rolling speed can be compensated by temperature control. That is, from the viewpoint of temperature control, changes in the deceleration start timing and the deceleration rate become disturbances.

In view of the above problems, the present invention provides a control apparatus and a control method of a finishing continuous rolling mill which can suppress the generation of a plate trouble caused by the deceleration of the rolling speed and can control the temperature of the rolled material in accordance with the deceleration of the rolling speed. And a control pattern creation method.

According to one aspect of the present invention, there is provided a control apparatus for a finishing continuous rolling mill in which a plurality of rolling stands are continuously arranged, and (a) a speed monitoring device for monitoring in real time the rolling speed at which the rolled material moves in the finishing continuous rolling mill; (B) Each time the rolled material is conveyed in the finishing continuous rolling mill for a certain length, the rolling speed is increased when the rolled material exits the decelerated finished rolling stand selected from the plurality of rolling stands by using the rolling speed and the predetermined reduction rate. A calculating device for calculating the deceleration start timing for starting the deceleration of the rolling speed so as to be the preset tail end disengaging speed; and (c) the finishing continuous rolling machine to start the deceleration of the rolling speed at the deceleration rate at the deceleration start timing. A speed control device that controls the adjustment of the rolling speed, and (d) turn on the rolled material resulting from the reduction of the rolling speed. To compensate for the change, the control device of the continuous finish rolling mill having a finishing temperature control device for controlling the temperature adjustment of the serialized confined by the continuous rolling mills are provided.

According to another aspect of the present invention, there is provided a control method of a finishing continuous rolling mill in which a plurality of rolling stands are arranged in succession, (A) a step of monitoring a rolling speed at which a rolled material moves in a final continuous rolling mill in real time; B) Each time the rolled material is conveyed in the finishing continuous rolling mill for a certain length, the rolling speed is set in advance when the rolled material exits the decelerated rolling stand selected from the plurality of rolling stands by using the rolling speed and the predetermined reduction rate. Calculating the deceleration start timing for starting the deceleration of the rolling speed so as to be the tail end disengaging speed; and (c) the rolling speed of the finish continuous rolling machine to start deceleration of the rolling speed at the deceleration rate at the deceleration start timing. (D) to compensate for the temperature change of the rolled material caused by the reduction of the rolling speed, A control method of a finishing continuous rolling mill including a step of controlling temperature control of a rolled material by a continuous rolling mill is provided.

According to still another aspect of the present invention, there is provided a method of producing a control pattern for controlling a finishing continuous rolling mill in which a plurality of rolling stands are continuously arranged, and (a) a rolling speed at which the rolled material moves in the finishing continuous rolling mill in real time. Each time the step to be monitored and (b) the rolled material is conveyed in the finishing continuous rolling mill for a certain length, the rolled material has exited the selected reduced rolling stand selected from the plurality of rolling stands by using the rolling speed and the predetermined reduction rate. A step of calculating the deceleration start timing for starting the deceleration of the rolling speed so that the rolling speed becomes a preset tail end disengaging speed at the time, and (c) including the deceleration start timing, and then carrying out the material to be rolled into the finishing continuous rolling mill. (D) creating a speed command pattern that defines the rolling speed until The control pattern creation method of the finishing continuous rolling mill which includes the step which prepares the temperature command pattern which prescribes the temperature control of the to-be-rolled material performed to a finishing continuous rolling mill so that the temperature change of the to-be-rolled material resulting from the reduction of a rolling speed may be carried out. Is provided.

According to the present invention, a control apparatus, a control method, and a control pattern generation method of a finishing continuous rolling mill capable of suppressing the generation of a plate trouble caused by the reduction of the rolling speed and controlling the temperature of the rolled material in accordance with the reduction of the rolling speed. Can be provided.

BRIEF DESCRIPTION OF THE DRAWINGS The schematic diagram which shows the structure of the control apparatus which concerns on embodiment of this invention.
2 is a conceptual diagram of an equivalent distance according to an embodiment of the present invention.
3 is a flowchart for explaining a method for calculating the deceleration start timing by the control device according to the embodiment of the present invention.
4 is a schematic diagram illustrating an example of a speed command pattern created by a control device according to an embodiment of the present invention.
It is a schematic diagram which shows an example of the temperature command pattern created by the control apparatus which concerns on embodiment of this invention.
6 is a flowchart for explaining a method of controlling a finishing continuous rolling mill by the control device according to the embodiment of the present invention.

EMBODIMENT OF THE INVENTION Next, embodiment of this invention is described with reference to drawings. In description of the following drawings, the same or similar number is attached | subjected to the same or similar part. The embodiment shown below illustrates the apparatus and method for incorporating the technical idea of this invention, and embodiment of this invention does not specify the structure, arrangement | positioning, etc. of component parts to the following. Embodiment of this invention can add various changes in a claim.

The control device 10 of the embodiment of the present invention is a device for controlling the finishing continuous rolling mill (20) arranged in a plurality of rolling stands F ₁ to F _z continuous as shown in Fig. 1 (z: 2 Integer greater than or equal to). The control apparatus 10 is a speed monitor apparatus 11 which monitors the rolling speed which the to-be-rolled material 100 moves in the finishing continuous rolling mill 20 in real time, and the to-be-rolled material 100 finishes a continuous rolling mill 20. ) When the inside of the sheet is conveyed for a certain length, using the rolling speed and the predetermined deceleration rate, the rolling speed is set in advance when the rolled material 100 exits the deceleration completed rolling stand selected from the rolling stands F ₁ to F _z . The calculating device 12 which calculates the deceleration start timing which starts the deceleration of a rolling speed so that it may become an edge part fall speed, and the finishing continuous rolling mill 20 so that deceleration of a rolling speed may be started at a predetermined deceleration rate in a deceleration start timing. Speed control device 13 for controlling the adjustment of the rolling speed by the rolling material, and the material to be rolled by the finishing continuous rolling mill 20 so as to compensate for the temperature change of the material to be rolled due to the reduction of the rolling speed. And a temperature control device 14 for controlling the temperature control of 0).

As described above, the deceleration start timing is newly calculated each time the rolled material 100 is conveyed for a certain length in the finishing continuous rolling mill 20. In the embodiment shown in FIG. 1, the movement amount detection sensors 31 and 32 are arrange | positioned at the introduction side and the discharge side of the finishing continuous rolling mill 20. As shown in FIG. The movement amount detection sensor 31 monitors the to-be-rolled material 100 at the introduction side of the finishing continuous rolling mill 20, and detects the movement amount of the to-be-rolled material 100. FIG. Thereby, the length of the to-be-rolled material 100 carried in the finishing continuous rolling mill 20 can be detected. In addition, the movement amount detection sensor 32 monitors the to-be-rolled material 100 on the discharge side of the finish continuous rolling mill 20, and detects the movement amount of the to-be-rolled material 100. FIG. Thereby, the length of the to-be-rolled material 100 carried out from the finishing continuous rolling mill 20 can be detected.

The movement amount Ld of the rolled material 100 detected by the movement amount detection sensors 31 and 32 is notified to the control device 10. For this reason, the control apparatus 10 can detect the position of the to-be-rolled material 100 which is moving in the finishing continuous rolling mill 20. As shown in FIG. Each time the notified movement amount Ld becomes a constant distance, the control apparatus 10 calculates deceleration start timing. Thereby, every time the to-be-rolled material 100 is conveyed in the finishing continuous rolling mill 20 for a fixed length, deceleration start timing is calculated. For example, each time the rolled material 100 moves 2 m, the deceleration start timing is calculated.

For example, at the start of the rolling process of the rolled material 100, the moving amount Ld of the rolled material 100 is notified to the control device 10 from the moving amount detection sensor 31. And after the movement amount Ld of the to-be-rolled material 100 is detected by the movement amount detection sensor 32, the movement amount Ld of the to-be-rolled material 100 is notified to the control apparatus 10 from the movement amount detection sensor 32. FIG.

The reduction rate of the rolling speed is set so that the temperature reduction of the to-be-rolled material 100 by the finishing continuous rolling mill 20 can be compensated, and the rolling speed can be reduced to the tail end releasing speed as soon as possible. In addition, a tail end pull-out speed is set so that a board | plate trouble may not generate | occur | produce after passing the finishing continuous rolling mill 20. FIG.

First, the finishing continuous rolling mill 20 shown in FIG. 1 is demonstrated. The finishing continuous rolling mill 20 is a rolling mill used for a hot rolling line, for example. In the example shown in FIG. 1, the number of stages of the rolling stand of the finishing continuous rolling mill 20 is z steps. In Figure 1, finished and displays the first stage of the rolling stand of the continuous rolling mill 20, the F _{1, the} rolling stands of the final stage with F _z. The rolled material 100 is gradually rolled as the inside of the finish continuous rolling mill 20 moves from the rolling stand F ₁ to the rolling stand F _z .

The continuous finishing mill (20), rolling stands F ₁ to F a drive unit arranged at each _z M ₁ to M with a _z. The drive devices M ₁ to M _z include motors driving the rolling stands F ₁ to F _z , respectively, and a speed detection device that detects the rolling speed from the operation of the motor. Rolling speed of the confined material (100) as it passes through the rolling stands F ₁ to F _z is set by the motor of the driving device M ₁ to M _z. Drive unit M ₁ through M _z of the speed detection device, for instance by monitoring the revolutions of the motor for controlling the rotational speed of the rolls rolling stands F ₁ to F _z, and detects a rolling speed.

Moreover, the finishing continuous rolling mill 20 has the temperature control apparatus 21 which adjusts the temperature of the to-be-rolled material 100. FIG. A temperature controller 21 is, for example, to adjust the cooling finish spray C ₁ to C _z spray flow rate of cooling the continuous rolling mill 20 is confined material (100) are moved in. Specifically, when the temperature of the rolled material 100 decreases due to the reduction of the rolling speed, the temperature control device 21 reduces the spray flow rate of the cooling sprays C ₁ to C _z , and thus, the temperature of the rolled material 100. Suppresses the temperature drop.

The temperature of the to-be-rolled material 100 just before carrying in to the finishing continuous rolling mill 20 is measured by the finishing introduction side thermometer (FET) 41. FIG. Moreover, the temperature of the to-be-rolled material 100 immediately after carrying out from the finishing continuous rolling mill 20 is measured by the finish discharge side thermometer (FDT) 42. FIG.

1 has shown the state which the front-end | tip of the to-be-rolled material 100 passed through the finishing introduction side thermometer 41. FIG. Below, the timing which the front-end | tip of the to-be-rolled material 100 passes through the finishing introduction side thermometer 41 is called "introduction side designation timing."

Next, the calculation method of the deceleration start timing by the control apparatus 10 is demonstrated. The control apparatus 10 calculates deceleration start timing by calculating tail end deceleration pattern information I demonstrated below. The tail end deceleration pattern information I includes the reference rolling stand F _STD and the time difference dt from the reference rolling stand F _STD . Here, the term "reference rolling stand" is confined material (100) after passing the reference rolling stand F _STD, before entering the rolling stand of the reference rolling stand F _STD next stage, that is the deceleration of the rolling speed start It is a rolling stand. "Time difference" is time after the to-be-rolled material 100 passes the reference rolling stand F _STD , and starts to decelerate a rolling speed.

In the following description, the discharge side of the rolling stand F _n of the nth stage is made into a deceleration completed position. That is, the rolling end F _n is the deceleration completion rolling stand, and the tail end is such that the rolling speed V _n when the tail end of the rolled material 100 exits the rolling stand F _n is a preset tail end detachment speed V _OUT. The case where the deceleration pattern information I is calculated is demonstrated.

In addition, the deceleration completed rolling stand whose rolling speed at the discharge side is the tail end removal speed V _OUT is usually set to the rolling stand at the final stage. However, due to an error in the control of the rolling speed, the rolling speed at the rolling stand discharge side of the final stage may not be reduced to the tail end removal speed V _OUT . For this reason, generation | occurrence | production of a trouble can be suppressed by setting a deceleration completed rolling stand to the rolling stand of the front end of the last stage, for example, the front end of a final stage. The control device 10 of the embodiment of the present invention, it is possible to select optionally the deceleration complete rolling stand from the rolling stands F ₁ to F _z.

Rolling stands F ₁ to relationship between the rolling speed of the rolling stand, F _m and the rolling stand F _n in any of the m-th stage contained in F _z are, are related by the law of mass flow as shown in Equation 1 below:

In Equation 1, V _m and V _n are rolling speeds at the discharge side of the rolling stand F _m and the rolling stand F _n , respectively. Also, h _m and h _n is the thickness of the rolling stand and the rolling stand F _n F _m confined series 100 in the discharge side of each. f _m and f _n are the advance rates of the rolling stand F _m and the rolling stand F _n , respectively.

The rolling speed (hereinafter referred to as "running speed") V _{RUN , n} of the rolled material 100 at the time of calculating the tail end deceleration pattern information I is detected by the driving device M _n of the rolling stand F _n . the performance values for their speed V _{ACT .n.} Speed performance value V _{ACT .n} is obtained by the speed monitoring device (11) monitors the driving device M _n in real time. The speed performance value _{VACT , n} monitored by the speed monitor device 11 is notified from the speed monitor device 11 to the calculation device 12.

The deceleration time Δt required to decelerate the rolling speed from the running speed V _{RUN , n} to the tail end release speed V _OUT is represented by the following equation (2):

β _n is a predetermined deceleration rate set for the rolling stand F _n . In addition, the deceleration rate, and, for each rolling stands F ₁ to F _z is previously set according to the advanced rate, depending on whether the one rolling stand with rolling stands completion of deceleration.

While the rolling speed is decelerating, the length (hereinafter referred to as "rolling material length") L _n of the passage portion of the rolled material 100 passing directly below the rolling stand F _n is calculated by the following equation:

(D "equal distance" in hereinafter) Further, the rolling stand F _n and a rolling stand F _n in between the front end of the rolling stand F _{n -1,} the distance relative to the discharge side of the rolling stand F _n L _{ESn -1, n} is defined by Equation 4:

_{PS L, n + 1} of Equation (4) is a rolling stand, the physical distance between the rolling stand and the rolling stand F _n F the front end of the rolling stand of the _n F _n-1. The equivalent distance defined in Equation 4 L _{ESn-1, n} is a distance between the rolling stand, considering the change in length of the confined material (100) by the reduction of the rolling stands F ₁ to F _n.

Equivalent distance between rolling stand F _n and rolling stand F _{n -1} Similar to L _{ESn -1, n} , each equivalent distance between rolling stands is the physical distance between rolling stands based on the discharge side of rolling stand F _n . And discharge side plate thickness. For example, the equivalent distance L _{ES1 , 2} between the rolling stand F ₁ and the rolling stand F ₂ is the thickness h of the rolled material 100 in each of the discharge side of the rolling stand F _{1 and} the discharge side of the rolling stand F _n . _It is defined as (h ₁ / h _n ) × L _{PS1 , 2} using the distance L _{PS1 , 2} between the physical rolling stands between ₁ , h _n and the rolling stand F ₁ and the rolling stand F ₂ . 2, the conceptual diagram of the equivalent distance between each rolling stand is shown.

The calculation apparatus 12 calculates a deceleration start timing as follows, comparing said rolled material length and equivalent distance. Here, a case of calculating the deceleration start timing when the leading end of the confined material (100) to position the introduction of the rolling stand F _k k side of the stage, it will be described with reference to FIG. By the movement amount Ld of the to-be-rolled material 100 notified from the movement amount detection sensors 31 and 32, the control apparatus 10 can specify the position of the to-be-rolled material 100 which is moving in the finishing continuous rolling mill 20. FIG. .

In step S110, when L _n <L _{ESn -1, n} , in step S115, the tail end of the to-be-rolled material 100 is rolled stand F _{n -1} of the n-1st stage and the rolled stand F of the nth stage. _The deceleration start timing is determined so as to start the deceleration of the rolling speed when it reaches between _n . Specifically, let rolling stand F _{n -1} be the reference rolling stand F _STD , and set the time difference dt as shown in equation (5):

That is, since the tail end of the to-be-rolled material 100 passes through the rolling stand F _{n- 1} , after the time difference dt represented by Formula (5), the deceleration start timing is determined to start deceleration of a rolling speed. On the other hand, if in step S110 L _n ≥L _{ESn -1, n} is a, the process proceeds to step S120.

In the case where L _n <L _{ESn -1, n} + L _{ESn -2, n-1} in step S120, in step S125, the tail end of the to-be-rolled material 100 has a rolling stand F _{n −} of the n-th stage. _The deceleration start timing is determined so as to start the reduction of the rolling speed when it reaches between the _2nd and n-1 th stage rolling stands F _{n- 1} . Specifically, the rolling stand F _{n -2} is set as the reference rolling stand F _STD , and the time difference dt is set as in Equation 6:

That is, since the tail end of the to-be-rolled material 100 passes through the rolling stand F _{n- 2} , after the time difference dt represented by Formula (6), the deceleration start timing is determined to start deceleration of a rolling speed.

In the same manner below, the reference rolling is performed so that the sum of the equivalent distances between the rolling stands F _n to the reference rolling stand F _STD which is the deceleration completed rolling stand is longer than the length of the rolled material L _n , and the sum of the equivalent distances is shortest. The stand F _STD is set, and the deceleration start timing is determined. For example, in step S130 of FIG. 3, L _n <L _{ESn-1, n} + L _{ESn-2, n-1} +... In the case of + L _{ESk , k + 1} , when the tail end of the to-be-rolled material 100 reaches between the rolling stand F _k of the kth stage and the rolling stand F _{k +1} of the kth stage in step S135, To start deceleration of the rolling speed, the deceleration start timing is determined. Specifically, the rolling stand F _k is _referred to as the reference rolling stand F _STD , and the time difference dt is set as in Equation 7:

That is, after the tail end of the confined material (100) passing through the rolling stands F _k, after the time difference dt indicated by the equation (7), the deceleration start timing is determined to start the deceleration of the rolling speed.

However, if L _{n ≥L ESn -1, n} + L _{ESn -2, n-1} + L _{ESk , k + 1} in step _{S130 ,} an alarm such as "Calculation of deceleration start timing is impossible" in step S140. A message is output and the calculation of the deceleration start timing is finished. This is because, in this case, the rolling speed cannot be reduced to the tail end pull-out speed V _OUT until the rolled material 100 exits the rolling stand F _n .

For example, the equivalent distance between the completion of deceleration rolling stands of rolling stand F _n and F _n the front end of the rolling stand of the rolling stand F _{n -1} L _{-1 ESn, n} this, the rolled plate length L _n of the confined material (100) In the case where it is longer, the deceleration start timing is set to start deceleration of the rolling speed between the rolling stand F _n and the rolling stand F _{n -1} . On the other hand, when the equivalent distance L _{ESn -1, n} between the rolling stand F _n and the rolling stand F _{n- 1} is less than or equal to the rolled material length L _n of the rolled material 100, the rolled material 100 is the rolling stand F _{n. The} deceleration start timing is set to start deceleration of the rolling speed before reaching _-1 .

The tail end deceleration pattern information I including the reference rolling stand F _STD and the time difference dt calculated as described above is notified to the speed control device 13 from the calculation device 12. As described above, the deceleration start timing is determined using the reference rolling stand F _STD and the time difference dt.

The speed control device 13 uses the tail end deceleration pattern information I to include a deceleration start timing and define a rolling speed from when the rolled material 100 is carried into the finishing continuous rolling mill 20 and then taken out. Create a speed command pattern. An example of the speed command pattern shown in FIG. 4 will be described below.

Time t0 is a start time of the rolling process of the to-be-rolled material 100 by the finishing continuous rolling mill 20. FIG. The rolling speed at this time is running speed _{VRUN , n} . Thereafter, at time t1, the deceleration of the rolling speed is started. That is, time t1 is time of deceleration start timing. The rolling speed is decelerated at the deceleration rate β _n , and the tail end removal speed V _OUT is reached at time t2 after the deceleration time Δt from time t1. The speed difference between the running speed V _{RUN .n} and the tail end release speed V _{OUT is} ΔV. Thereafter, the rolling speed is maintained at the tail end pull-out speed V _OUT until the time t3 at which the rolling process of the rolled material 100 ends. Thus, the rolling speed | rate in the rolling process of the to-be-rolled material 100 by the finishing continuous rolling mill 20 is prescribed | regulated by the speed command pattern. 4, the rolled material length L _n of the to-be-rolled material 100 is determined by deceleration time (DELTA) t, speed difference (DELTA) V, and deceleration rate (beta) _n .

The temperature control device 14 performs the operation of the temperature control device 21 while the rolled material 100 moves in the finish continuous rolling mill 20 based on the speed command pattern created by the speed control device 13. Create a prescribed temperature command pattern. The temperature regulation apparatus 21 of the finishing continuous rolling mill 20 operates according to this temperature command pattern, and the temperature of the to-be-rolled material 100 while moving in the finishing continuous rolling mill 20 is adjusted.

For example, to compensate for the drop in temperature of the confined material (100) due to deceleration of the rolling speed, by spraying a coolant on the confined material (100) for adjusting the spraying flow rate of the cooling spray C ₁ to C _z lowering the temperature Create a temperature command pattern. That is, it creates as a temperature command pattern so that the spray flow volume pattern which reduces the spray flow volume sprayed on the to-be-rolled material 100 as a rolling rate falls may be performed. 5, Fig. 4 created on the basis of the command speed pattern shown in, for example, shows a temperature pattern command for adjusting the spraying flow rate of the cooling spray C ₁ to C _z. The spray flow rate is constant while the rolling speed is constant, and the spray flow rate is reduced while the rolling speed is decelerated. FIG. 5 shows an example in which the spray flow rate is Q1 at the rolling speed V _{RUN , n and} the spray flow rate after the rolling speed is reduced to the tail end removal speed V _OUT at the rolling speed V _{RUN , n} .

As mentioned above, the control apparatus 10 calculates the speed command pattern which includes the deceleration start timing which reaches | attains the desired tail end removal speed in a desired rolling stand using the performance value of a rolling speed. Moreover, the control apparatus 10 creates the temperature command pattern which adjusts the temperature of the to-be-rolled material 100 using a speed command pattern. That is, the control apparatus 10 creates the control pattern of the finishing continuous rolling mill 20 containing a speed command pattern and a temperature command pattern, and controls the finishing continuous rolling mill 20 using this control pattern. Thereby, generation | occurrence | production of the board | substrate trouble resulting from a rolling speed is suppressed, and also the occurrence of the quality problem by lack of temperature precision is suppressed by compensating for the temperature fall of the to-be-rolled material 100 with slowing of a rolling speed.

The operation of the control device 10 will be described below with reference to FIG. 6. Hereinafter, the case where the deceleration completed rolling stand is a rolling stand F _n is demonstrated.

In step S10, the calculation device 12 calculates the first tail end deceleration pattern information I at a preset timing, for example, the introduction-side designation timing described above. That is, the reference rolling stand F _STD and the time difference dt are calculated so that the rolling speed in the decelerated rolling stand becomes the tail end removal speed V _OUT by using the rolling speed at the introduction side designation timing and the predetermined reduction rate. . The tail end deceleration pattern information I including the calculated reference rolling stand F _STD and the time difference dt is notified to the speed control device 13 from the calculation device 12. Based on the tail end deceleration pattern information I, the speed control device 13 creates the speed command pattern Ps.

In step S20, the speed control apparatus 13 controls the finishing continuous rolling mill 20 based on the speed command pattern Ps. That is, the speed control apparatus 13 controls the rolling speed of the to-be-rolled material 100 conveyed in the finishing continuous rolling mill 20 so that the rolling speed prescribed | regulated to the speed command pattern Ps may be implement | achieved.

In step S30, output device 12 is, confined series 100 is finalized continuous rolling mill (20) each time the carrying predetermined length my reference to Figure 3 using the method described above, the rolling stands F ₁ to F The rolling stand F _n previously selected from _z is newly calculated as the reference rolling stand F _STD and the time difference dt as the deceleration completed rolling stand. That is, using the running speed V _{RUN .n} or the predetermined deceleration rate β _n monitored by the speed monitoring device 11, the rolling speed when the rolled material 100 exits the rolling stand F _n is set in advance. The reference rolling stand F _STD and the time difference dt are calculated so that the end pull-out speed V _OUT is reached. As described above, the deceleration start timing is determined from the tail end deceleration pattern information I including the reference rolling stand F _STD and the time difference dt. Based on the calculated reference rolling stand F _STD and the tail end deceleration pattern information I including the time difference dt, the speed control device 13 creates a new speed command pattern Ps.

In step S40, the temperature control apparatus 14 creates the temperature command pattern Pt which compensates for the temperature fall of the to-be-rolled material 100 according to the deceleration of rolling speed based on the newly created speed command pattern Ps.

In step S50, the speed control apparatus 13 controls adjustment of the rolling speed by the finishing continuous rolling mill 20 based on the speed command pattern Ps. That is, the drive devices M ₁ to M _z are controlled by the speed control device 13 to realize the rolling speed defined in the speed command pattern Ps, so that the rolling speed of the rolled material 100 is adjusted. For this reason, in the deceleration start timing calculated by the calculation device 12, the deceleration of the rolling speed is started at a predetermined deceleration rate. Simultaneously with the control of the rolling speed by the speed control device 13, the temperature control device 14 controls the temperature control device 21 of the finish continuous rolling mill 20 based on the temperature command pattern Pt. That is, the temperature control device 21 is controlled by the temperature control device 14 so as to realize the temperature control operation defined in the temperature command pattern Pt, so that the temperature of the rolled material 100 is adjusted. However, when the deceleration start timing cannot be calculated in step S30, the alarm message is output as described above, and the calculation of the deceleration start timing ends. When the new deceleration start timing cannot be calculated as described above, the control device 10 controls the finishing continuous rolling mill 20 using the latest speed command pattern Ps and temperature command pattern Pt calculated immediately before.

When the rolling process is not finished with respect to the to-be-rolled material 100 in step S60, a process returns to step S30 and every time the to-be-rolled material 100 conveys a fixed length in the finish continuous rolling mill 20, a speed The command pattern Ps and the temperature command pattern Pt are newly created. On the other hand, when the rolling process of the to-be-rolled material 100 is complete | finished, control of the finishing continuous rolling mill 20 by the control apparatus 10 is complete | finished.

As described above, the controller (10), finishing the continuous drive of the rolling mill, finishing continuous rolling mill (20) each time a confined series 100, the introduction side (20) to pass through a length M ₁ to M _z The deceleration start timing for reaching the desired tail end disengaging speed at the desired rolling stand is calculated by using the performance value of the rolling speed obtained by monitoring. For this reason, even if there exists a change of the rolling speed by dynamic control after a deceleration start timing is calculated, the deceleration start timing is newly calculated using the rolling speed after a change. That is, the calculation accuracy of the deceleration start timing can be improved. In addition, by creating the temperature command pattern using the speed command pattern including the deceleration start timing, the accuracy of temperature control of the rolled material 100 can be improved.

Therefore, according to the control apparatus 10 which concerns on embodiment of this invention, the finishing continuous rolling mill which can suppress generation | occurrence | production of the board | substrate trouble resulting from a rolling speed, and can control the temperature of a to-be-rolled material according to the reduction of a rolling speed. The control apparatus of 20, a control method, and a control pattern preparation method can be provided.

(Other Embodiments)

As mentioned above, although this invention was described by embodiment, the description and drawing which form a part of this indication should not be understood that it limits this invention. Various alternative embodiments, examples and operational techniques will be apparent to those skilled in the art from this disclosure.

In the embodiments of the description described above, it shows an example of monitoring the rolling speed is detected by the drive unit M ₁ through M _z of the continuous finishing mill (20). However, the speed monitor device 11 may directly monitor the rotation speed of the motor driving the rolling stands F ₁ to F _z to detect the rolling speed.

As such, the present invention obviously includes various embodiments and the like which are not described herein. Therefore, the technical scope of this invention is defined only by the invention specific matter which concerns on an appropriate claim from said description.

The control technique of the finishing continuous rolling mill of this invention can be utilized for the manufacturing industry which roll-processes a material.

M ₁ to M _z : Drive device
F ₁ to F _z : rolling stand
C ₁ to C _z : cooling spray
10: control device
11: speed monitor device
12: output device
13: speed control device
14: temperature control device
20: finishing continuous rolling mill
21: thermostat
31, 32: moving amount detecting sensor
41: finish introduction thermometer
42: finish discharge thermometer
100: rolled material

Claims (15)

As a control apparatus of the finishing continuous rolling mill in which several rolling stands were continuously arranged,
A speed monitor device for monitoring in real time the rolling speed at which the rolled material moves in the finishing continuous rolling mill;
Whenever the to-be-rolled material exits the deceleration-completed rolling stand selected from the plurality of rolling stands, using the rolling speed and a predetermined deceleration rate, each time the rolled material is conveyed in the finishing continuous rolling mill for a predetermined length. A calculating device for calculating a deceleration start timing for starting deceleration of the rolling speed so that the speed becomes a preset tail end removal speed;
A speed control device for controlling the adjustment of the rolling speed by the finishing continuous rolling mill to start the reduction of the rolling speed at the deceleration rate at the deceleration start timing;
And a temperature control device for controlling the temperature control of the rolled material by the finishing continuous rolling mill so as to compensate for the temperature change of the rolled material due to the reduction of the rolling speed.
The speed control device includes the deceleration start timing, and creates a speed command pattern that defines the rolling speed from when the rolled material is brought into the finishing continuous rolling mill and then taken out;
The temperature control device creates a temperature command pattern that defines the temperature control of the rolled material to be executed by the finishing continuous rolling mill to compensate for the temperature change of the rolled material on the basis of the speed command pattern. Control device of finishing continuous rolling mill. The method of claim 1, wherein the calculating device,
By using the length of the passage part of the to-be-rolled material which passes the said decelerated rolling stand while the said rolling speed decelerates, and the equivalent distance based on the discharge side of each said decelerated rolling stand between the said plurality of rolling stands. And the deceleration start timing is calculated. The method of claim 2, wherein the calculating device,
The reference rolling stand is specified so that the sum of the equivalent distances between the rolling stands from the decelerated rolling stand is longer than the length of the passage portion of the rolled material,
When the tail end of the rolled material reaches between the reference rolling stand and the rolling stand of the next stage of the reference rolling stand, the deceleration start timing is set to start deceleration of the rolling speed. Control device of continuous rolling mill. delete The said speed monitor apparatus monitors the speed detection apparatus of any one of Claims 1-3 which detects the said rolling speed from rotation of the motor of the said finishing continuous rolling mill which drives the said several rolling stand, And monitoring the rolling speed. The said to-be-rolled material by the said finish continuous rolling mill as described in any one of Claims 1-3 by which the said temperature control apparatus controls the injection quantity of the cooling spray of the said finish continuous rolling mill which reduces the temperature of the said to-be-rolled material. The control device of the finishing continuous rolling mill, characterized in that to control the temperature regulation of. As a control method of the finishing continuous rolling mill in which several rolling stands were arrange | positioned continuously,
Monitoring the rolling speed at which the rolled material moves in the finishing continuous rolling mill in real time;
Whenever the to-be-rolled material exits the deceleration-completed rolling stand selected from the plurality of rolling stands, using the rolling speed and a predetermined deceleration rate, each time the rolled material is conveyed in the finishing continuous rolling mill for a predetermined length. Calculating a deceleration start timing for starting deceleration of the rolling speed so that the speed becomes a preset tail end removal speed;
Controlling adjustment of said rolling speed by said finishing continuous rolling mill to start deceleration of said rolling speed at said deceleration rate at said deceleration start timing;
And controlling the temperature control of the rolled material by the finish rolling mill to compensate for the temperature change of the rolled material due to the reduction of the rolling speed. The method of claim 7, wherein the step of calculating the deceleration start timing,
By using the length of the passage part of the to-be-rolled material which passes the said decelerated rolling stand while the said rolling speed decelerates, and the equivalent distance based on the discharge side of each said decelerated rolling stand between the said plurality of rolling stands. And the deceleration start timing is calculated. The method of claim 8, wherein the step of calculating the deceleration start timing is
Specifying a reference rolling stand so that the sum of the equivalent distances between the rolling stands from the decelerated rolling stand is longer than the length of the passage portion of the rolled material;
And setting the deceleration start timing to start deceleration of the rolling speed when the tail end of the rolled material reaches between the reference rolling stand and the rolling stand of the next stage of the reference rolling stand. The control method of the finishing continuous rolling mill characterized by the above-mentioned. 10. The speed command pattern according to any one of claims 7 to 9, comprising the speed reduction start timing, wherein the speed command pattern is defined to define the rolling speed from when the rolled material is loaded into the finishing continuous rolling mill before being taken out. With the step to do,
And a step of creating a temperature command pattern that defines temperature control of the rolled material to be executed in the finishing continuous rolling mill to compensate for the temperature change of the rolled material based on the speed command pattern. Control method of continuous rolling mill. The injection amount of the cooling spray of the finishing continuous rolling mill which reduces the temperature of the said to-be-rolled material in the step of controlling the temperature control of the said to-be-rolled material in any one of Claims 7-9 characterized by the above-mentioned. Control method of finishing continuous rolling mill. As a manufacturing method of the control pattern which controls the finishing continuous rolling mill in which several rolling stands were continuously arranged,
Monitoring the rolling speed at which the rolled material moves in the finishing continuous rolling mill in real time;
Whenever the to-be-rolled material exits the deceleration-completed rolling stand selected from the plurality of rolling stands, using the rolling speed and a predetermined deceleration rate, each time the rolled material is conveyed in the finishing continuous rolling mill for a predetermined length. Calculating a deceleration start timing for starting deceleration of the rolling speed so that the speed becomes a preset tail end removal speed;
A step of creating a speed command pattern including the deceleration start timing and defining the rolling speed from when the rolled material is loaded into the finishing continuous rolling mill and then taken out;
Based on the speed command pattern, a step of creating a temperature command pattern defining temperature control of the rolled material to be executed in the finishing continuous rolling mill to compensate for the temperature change of the rolled material due to the reduction of the rolling speed; Control pattern creation method of the finishing continuous rolling mill characterized by including. The method of claim 12, wherein the step of calculating the deceleration start timing,
By using the length of the passage part of the to-be-rolled material which passes the said decelerated rolling stand while the said rolling speed decelerates, and the equivalent distance based on the discharge side of each said decelerated rolling stand between the said plurality of rolling stands. The control pattern preparation method of the finishing continuous rolling mill characterized by calculating the deceleration start timing. The method of claim 13, wherein the step of calculating the deceleration start timing,
Specifying a reference rolling stand so that the sum of the equivalent distances between the rolling stands from the decelerated rolling stand is longer than the length of the passage portion of the rolled material;
And setting the deceleration start timing to start deceleration of the rolling speed when the tail end of the rolled material reaches between the reference rolling stand and the rolling stand of the next stage of the reference rolling stand. The control pattern creation method of the finishing continuous rolling mill characterized by the above-mentioned. The finishing continuous rolling mill according to any one of claims 12 to 14, wherein the temperature command pattern is a control pattern for defining an injection amount of a cooling spray of the finishing continuous rolling mill to lower the temperature of the rolled material. Control pattern creation

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