KR20070056992A - Speed control method for continuous processing equipment - Google Patents

Abstract

A speed control method for a continuous processing apparatus is provided to always efficiently operate the continuous rolling apparatus without depending on skill of an operator by automatically setting up speed of an entrance side equipment, speed of a central equipment and speed of an exit side equipment in a continuous rolling apparatus. In a speed control method for a continuous processing apparatus having an entrance side equipment(1) for feeding a rolling workpiece, a central equipment(2) for processing the rolling workpiece fed from the entrance side equipment, an exit side equipment(3) for rolling the rolling workpiece fed from the central equipment to a predetermined strip thickness, an entrance side looper(4) disposed between the entrance side equipment and the central equipment, and an exit side looper(5) disposed between the central equipment and the exit side equipment, the speed control method for the continuous processing apparatus comprises: computing required accumulation amounts of the entrance side looper and the exit side looper according to estimated values and actual result values of operation patterns of the entrance side equipment and the exit side equipment; and controlling speeds of the entrance side equipment, the central equipment and the exit side equipment such that accumulation amounts of the entrance side looper and the exit side looper become the required accumulation amounts to be computed.

Description

SPEED CONTROL METHOD FOR CONTINUOUS PROCESSING EQUIPMENT}

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a block diagram showing an embodiment of a speed control method for a continuous rolling mill according to the present invention.

2 is an explanatory diagram showing an example of a continuous rolling equipment;

Fig. 3 is a flowchart for explaining the work required at the inlet and outlet equipment in the embodiment of the present invention.

4 is an explanatory diagram showing an example of a looper used in the embodiment of the present invention.

5 is an explanatory diagram showing a method for determining the required looper amount in the embodiment of the present invention.

Fig. 6 is an explanatory diagram of a looper required amount calculation method in the embodiment of the present invention.

Fig. 7 is an explanatory diagram of a looper required amount change calculation method in the embodiment of the present invention.

Fig. 8 is an explanatory diagram showing a process of the exit speed difference setting device in the embodiment of the present invention.

Fig. 9 is an explanatory diagram showing the operation of the center speed setting device in the embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

1: entrance equipment

2: central equipment

3: outlet side equipment

4: Entrance looper

5: Exit looper

10: entrance speed difference setting device

11: Outlet speed difference setting device

12: entrance looper required amount calculation device

13: Exit looper required amount calculation device

14: center speed setting device

[Document 1] Japanese Unexamined Patent Publication No. 6-520

[Document 2] Japanese Unexamined Patent Publication No. 6-122011

The present invention relates to a control method of a facility for continuously processing a workpiece, and more particularly, to a speed control method suitable for controlling the rolling speed in a continuous rolling facility using a coil-like thin sheet material as a rolled material.

As a kind of equipment for continuously processing the workpiece, there is a continuous rolling equipment for thin plate materials such as strip steel sheets coiled. In such continuous rolling equipment, inlet equipment, central equipment, In addition, it is common to be divided into outlet facilities.

So, an example of such a continuous rolling apparatus is demonstrated by FIG. 2, an example of the actual machine of such a continuous rolling installation is shown as a reference example below.

In Fig. 2, first, the inlet-side facility 1 takes out the coiled rolled material from the pay-off reel 111 and supplies it to the rolling mill 131 of the outlet-side facility 3. The welding machine 132 is provided to continuously supply the soft material, and when the coil of the rolled material is drawn out for one winding, the coil of the next rolled material is inserted into the pay-off reel 111 and the rear end of the preceding rolled material The tip of the next rolled material is to be welded.

Next, the central facility 2 functions to adjust the properties of the rolled material and the state of the surface to be supplied to the rolling mill 131. Thus, the central facility 2 is equipped with facilities such as pickling baths and continuous annealing furnaces. At this time, in order to uniformly impart chemical treatment or thermal treatment of the material to be rolled, it is necessary to control the movement speed of the material to be rolled in a certain range.

The exit equipment 3 is provided with a rolling mill 131, in which a rolled material to be rolled is subjected to a process of forming a product having a predetermined thickness, and is then wound around the tension reel 132 to become a product coil. At this time, the weekly shear 133 is provided in the exit side of the rolling mill 131, and the to-be-rolled material to be rolled continuously is cut | disconnected in moderate length, and it is made into the coil of a product unit.

At this time, although the inlet side looper 4 is provided between the inlet side equipment 1 and the center plant 2, and the outlet side looper 5 is provided between the center plant 2 and the outlet side plant 3, This is to absorb the flow rate difference of the material to be rolled.

The looper is a mechanism for forming a loop (bending extension) in a strip-shaped rolled material. When the loop is formed in this way, the loop size is changed so that the loop pressure is applied to a length defined by the scale of the looper equipment. The flexible material can be fixed, and therefore, by providing this looper, the speed difference of the material to be rolled can be absorbed for a predetermined period.

As described above, in the inlet-side facility 1, it is necessary to stop the rolled material once in order to perform welding between the rolled materials. In addition, it is necessary to slow down the rolling speed of the rolling mill 131 in the exit side installation 3 because of the cutting operation | work of a to-be-rolled material and a change of a product specification. On the other hand, in the central installation 2, it is necessary to maintain a moving speed in a range as mentioned above. That is, the moving speed of the to-be-rolled material differs in the inlet installation 1, the central installation 2, and the exit installation 3, respectively.

Therefore, in order to absorb the movement speed difference at this time, the inlet side looper 4 and the outlet side looper 5 are provided, and the speed difference between the inlet side equipment 1 and the central plant 2 is the inlet side looper ( 4), and the speed difference between the central equipment 2 and the outlet equipment 3 is absorbed by the outlet looper 5. As shown in FIG.

By the way, when a rolling speed changes, the plate | board thickness, tension, a shape, etc. of the rolled to-be-rolled material will change. Therefore, at the inlet of the rolling mill 131, it is necessary to constantly maintain the speed of the material to be rolled, and therefore, the outlet side equipment 3 needs to be controlled so as not to change the speed as much as possible.

Thus, in some prior arts, the average speed during rolling the coil 1 winding by the inlet facility and the central facility, and the outlet facility thereof, is calculated, and the minimum value thereof is used to control the speed control target value of the outlet facility 3. The method of making it is proposed (for example, refer patent document 1).

In addition, although the welding work of the to-be-rolled material is performed in the inlet equipment, in this case, depending on the kind of the to-be-rolled material, welding may take time and a long stop may be required. In this case, the rolling mill in the outlet equipment is used. A method of varying the speed of is proposed as a prior art (see Patent Document 2, for example).

[Patent Document 1] Japanese Patent Application Laid-Open No. 6-520

[Patent Document 2] Japanese Patent Application Laid-Open No. 6-122011

The above prior art does not consider that the setting of the moving speed of the rolled material depends on the operation of the operator, and there is a problem that the maintenance of product quality and manufacturing efficiency depends on the skill of the operator.

In the above prior art, the average speed required to roll a coil of one winding is calculated in advance, including the time required for welding work on the inlet side or weekly cut work on the outlet side, and the minimum value thereof is set as the speed target value of the outlet side equipment. And the operator is controlled so that it may become this speed target value.

For this reason, during rolling operation, when the operation of the entrance equipment is delayed and the speed is lowered from the speed target value or the operation is completed earlier than expected, the operator needs to view and operate the actual operation situation when the speed is increased. .

In addition, since the change of the set speed follows at least one of acceleration and deceleration of the rolling mill, there is a possibility that the operation state may become unstable, and variations in sheet thickness and tension may occur. Therefore, it is necessary to suppress the variation within a certain range. This requires a high level of skill for the operator, which causes problems in maintaining product quality and manufacturing efficiency.

In the case of such a continuous rolling mill, it is also possible to actually increase the operation efficiency by increasing the speed of the outlet-side equipment, but at this time, the speed target value is set in advance in the prior art. Therefore, in this case, it is necessary for the operator to determine the operation situation and newly determine the setting speed of each facility. Therefore, the operator is required to be skilled at this point, and the problem of maintaining the product quality and manufacturing efficiency is caused. do.

SUMMARY OF THE INVENTION An object of the present invention is to provide a method for controlling the speed of a continuous processing facility so that the setting of the moving speed of a workpiece can be automatically obtained.

The above object is a speed control method of a continuous processing facility having a plurality of facilities having different operating speeds or operation timings and a looper facility for absorbing a difference in operating speed therebetween, wherein the product accumulation amount of the looper facility is determined by the plurality of products. It is achieved by determining from the operating state of the equipment and controlling the operation speed of the plurality of equipment so that the actual product accumulation amount of the looper equipment is the determined product accumulation amount.

Similarly, the object is an inlet facility for supplying the rolled material, a central facility for processing the rolled material supplied from the inlet facility, an outlet facility for rolling the rolled material supplied from the central facility to a predetermined plate thickness; A speed control method for a continuous rolling plant comprising: an inlet side looper disposed between the inlet facility and the central facility; and an outlet side looper disposed between the central facility and the outlet facility. And calculate the required accumulation amount of the inlet side looper and the outlet side looper according to the predicted value and the performance value of the operation pattern of the outlet side equipment, so that the accumulation amount of the inlet side looper and the outlet side looper is the calculated necessary accumulation amount. It is also achieved by controlling the speeds of the inlet and control central equipment, and the outlet equipment.

In this case, the central equipment may include means for chemically treating and thermally processing the material to be rolled, and the speed of the central equipment may be changed within the allowable range required for at least one of the chemical treatment or the thermal treatment. .

In addition, at this time, the continuous rolling equipment may be provided with equipment other than the inlet equipment, the central equipment and the outlet equipment.

Similarly, at this time, for each of the facilities, the speed may be controlled within the allowable ranges set in accordance with the processing performed at each facility, and the speed change of each facility is based on the change rate set to such an extent that it does not affect the product precision. May be executed.

EMBODIMENT OF THE INVENTION Hereinafter, the rolling speed control apparatus of the continuous rolling installation which concerns on this invention is demonstrated in detail by embodiment shown.

1 is an embodiment of the present invention, which is an embodiment in which the present invention is applied to the continuous rolling equipment of FIG. 2, and accordingly, in this FIG. 1, the inlet-side equipment 1, the central equipment 2, the outlet The side equipment 3, the inlet side looper 4, and the outlet side looper 5 are the same as in the case of FIG.

Thus, the inlet-side equipment 1 is provided with a pay-off reel 111 and a welding machine 112, as shown in FIG. In order to continuously supply the material to be rolled, the inlet-side facility 1 needs to execute the work shown in Fig. 3 (1) during the facility operation.

First, when one coil of the rolled material is drawn out, the coil of the next rolled material is inserted into the payoff reel 111, and the front end of the next rolled material is welded to the rear end of the previous rolled material.

First, when the preceding material (previous rolled material) is finished dispensing from the pay-off reel 111 (step 201), the rear end of the preceding material is stopped at the welder position (step 202). Subsequently, a coil of a trailing material (next rolled material) is inserted into the pay-off reel 111 in which the coil of the preceding material has disappeared (203), and the rolling material is prepared for rolling.

Next, the leading end of the trailing material is dispensed from the coil to the welder position (step 204), and the trailing end of the preceding material and the leading end of the trailing material are welded by the welding machine (step 205). When the welding is completed, the inlet-side equipment 1 is accelerated (206), and the rolled material is accumulated in the inlet-side looper (4).

In addition, the exit equipment 3 is provided with a rolling mill 131 or a weekly shear 133. In the rolling mill 131, a rolled material is rolled and processed into a product, but at the time, the entrance equipment 1 is welded. In order to divide one to-be-rolled material, it is necessary to perform the operation shown in FIG.

When the point to be divided by the coil of the rolled material is close to the rolling mill 131, the outlet side equipment 3 is decelerated (step 211). When the deceleration is completed, it is cut by the weekly shear 133 at the time of passing the welding point (step 212), and divided into coils. When the splitting of the coil is completed, the leading end of the trailing material is wound around the tension reel 132 (step 213). When the winding is completed, the outlet side equipment 3 is accelerated (step 214) and the rolled material is accumulated in the outlet side looper 5.

At this time, since the central equipment 2 is preferably operated at a constant speed, the inlet side looper 4 is provided at the stop of the inlet equipment 1 to increase the amount of looper, and the inlet equipment 1 is stopped. Even in this case, the supply of the rolled material to the central facility 2 can be maintained.

In addition, the outlet looper 5 is provided at the deceleration of the outlet equipment 3 to reduce the looper amount, and when the speed of the outlet equipment 3 is lower than that of the central equipment 2, the remaining blood pressure is reduced. Since it is necessary to accumulate a soft material, it is necessary to make room for a looper amount.

Therefore, in the present embodiment, details will be described later, but the minimum accumulation amount is obtained for the inlet looper 4 and the maximum accumulation amount is obtained for the outlet looper 5 to control the speed.

As described above, in the present embodiment, the continuous rolling equipment including the inlet facility 1, the central facility 2, the outlet facility 3, the inlet side looper 4, and the outlet side looper 5 is provided. In addition, as shown in Fig. 1, the inlet speed difference setting device 10, the outlet speed difference setting device 11, the inlet side looper required amount calculating device 12 and the outlet side looper required amount calculating device 13 are shown. In addition, the central speed setting device 14, the inlet side looper amount calculating device 151 and the outlet side looper required amount calculating device 152 are provided.

Then, the inlet-side speed difference setting device 10 first loops required by the inlet-side looper 4 and the outlet-side looper 5 from operating conditions of the inlet-side equipment 1 and the outlet-side equipment 3. Calculate the quantity, and obtain the speed difference between the inlet equipment 1 and the center equipment 2 as the inlet speed difference so that the loop amount is the required loop amount, and the outlet side which is the speed difference between the outlet equipment 3 and the center equipment 2; The speed difference is obtained using the speed difference setting device 11 on the outlet side.

In this case, the inlet equipment 1 and the outlet equipment 3 have a minimum speed and a maximum speed, respectively, so that the speed difference between the central equipment 2 is set within the range. There is a case when it is impossible. Therefore, in this case, the center speed setting is operated by the center speed setting device 14 to operate the speed of the central equipment 2. This is because the speed of the central equipment 2 is preferably a constant value, but if it is within a certain range, it is allowed to change somewhat.

In addition, at this time, in the inlet speed difference setting device 10 and the outlet speed difference setting device 11, the looper required amount and the looper amount calculated by the inlet side looper amount calculating device 151 and the outlet side looper amount calculating device 152. Find the difference in performance as the looper amount deviation and also the minimum speed difference required to maintain it.

In this case, if there is a speed difference, the looper amount performance does not become a necessary amount of looper. Therefore, it is necessary to lower the speed difference in accordance with the decrease in the looper amount variation. It is suppressed smaller than the ratio (about 1/5 to 1/10), and it does not give disturbance to plate | board thickness and tension | tensile_strength.

Specifically, in the inlet speed difference setting device 10, the inlet side looper required amount which is the result of the inlet looper required amount calculating device 12 and the looper amount performance difference calculated by the inlet side looper amount calculating device 151 are The input speed difference is calculated, and the exit speed difference setting device 11 calculates the exit looper required amount which is the result of the calculation of the exit looper required amount calculating device 13 and the looper amount calculated by the exit looper required amount calculating device 152. It is to calculate the exit speed difference, which is the difference in performance.

Next, the inlet side looper 4 and the outlet side looper 5 will be described here, as shown in FIG. 4, both of which are a looper equipment electric motor (motor) 302 and a looper equipment fixed side roll 303, The looper equipment moving side roll 304 is provided, and the looper equipment moving side roll 304 is made to be movable left and right by the looper equipment electric motor (motor) 302.

Therefore, when the looper equipment moving side roll 304 is moved by the looper equipment electric motor 302, the length of the loop of the rolled material is changed, whereby the accumulation amount of the rolled material can be arbitrarily controlled. 304 may determine the movable range from mechanical constraints.

Here, FIG. 4 (1) is the state at the time of maximum accumulation amount, and FIG. 4 (2) is the state at the time of minimum accumulation amount, and the accumulation amount can be changed between them. Thus, the maximum value and the minimum value of the looper amount resulting from the mechanical constraints will be referred to as the mechanical maximum accumulation amount and the mechanical minimum accumulation amount, respectively.

Then, the inlet side looper amount calculating device 151 and the outlet side looper amount calculating device 152 are looper facilities moving side rolls 304 for each of the inlet side looper 4 and the outlet side looper 5, respectively. The looper amount is calculated from the position of the looper and the mechanical configuration of the looper.

At this time, the inlet looper 4 may have a looper accumulation amount in the range from the mechanical maximum accumulation amount to the lowest accumulation amount, and the outlet side looper 5 may have a looper accumulation amount in the range from the mechanical minimum accumulation amount to the maximum accumulation amount. . Specifically, the required accumulation amount of the inlet side looper 4 and the outlet side looper 5 may be obtained in the manner of thinking as shown in FIG.

First, since the entrance equipment 1 performs the operation demonstrated by FIG. 3 (1), it operates by the speed pattern shown in FIG. In addition, the low speed time which stops the entrance equipment 1 here adds a spare time to the time required for the process of step 201 to step 206 in the entrance equipment 1. In addition, the spare time here is a preliminary time to consider when each operation does not progress smoothly.

In FIG. 5 (1), the portion where the inlet equipment speed indicated by the solid line is lower than the center equipment speed indicated by the broken line is a part that needs to be supplemented with the rolled material by the inlet-side looper 4. The inlet side looper minimum accumulation amount 250 is determined from the part.

Next, the outlet side equipment 3 is operated in the speed pattern shown in Fig. 5 (2). At this time, since the outlet side equipment 3 has a mechanical configuration capable of performing the operations from step 211 to step 214 in Fig. 3 (2) while driving, it is not necessary to basically set the exit speed to zero. . In this case, the low speed time is a time required for the operation from step 211 to step 214, plus the allowable time as described above.

5 (2), the part in which the exit equipment speed is lower than the center equipment speed is the part which accumulates in the exit side looper 5, and becomes the exit side looper required accumulation amount 251. FIG. Therefore, while the exit equipment 3 is running at low speed, the exit looper 5 needs to accumulate this amount, so the maximum amount of the exit looper is the mechanical maximum amount of the exit looper and the required amount of exit looper is the required accumulation amount. Minus 251.

At this time, the acceleration / deceleration rate of the speed in the inlet facility 1 and the outlet facility 3 is predetermined. Therefore, if the time required for the operation from step 201 to step 206 and the time required for the operation from step 211 to step 214 can be predicted, the inlet looper minimum accumulation amount 250 and the outlet side looper accumulation amount 251 can be estimated. ) Can be obtained.

Fig. 6 shows a method of calculating the required looper amount, and the looper required accumulation amount 1 is represented by the following equation (1), with the acceleration / deceleration rate αo, the low speed time To, the deceleration speed Vo, and the central equipment speed Vc. You can get it.

l = {(Vc-Vo) / αo + To}. (Vc-Vo)... (One)

By the way, the state of the entrance equipment 1, the central equipment 2, and the exit equipment 3 is changed every time. Therefore, this looper required amount 1 needs to be appropriately calculated and updated in accordance with the above-described change. As an example, Fig. 7 shows an example in which the necessary looper amount of the inlet-side equipment 3 is considered.

Here, FIG. 7 (1) is a figure at the time of the current position 260 of a speed pattern in the state before the entrance equipment 1 commences operation | movement from step 201 to step 206. FIG. Here, the inlet-side looper required amount 261 is calculated from the low-speed time obtained by adding the extra time to the standard time required for the work from the step 201 to the step 206 on the inlet side.

Next, Fig. 7 (2) and Fig. 7 (3) are in the state at the time of the current position 2 O, where Fig. 7 (2) shows the above Fig. 7 when the operation up to step 202 is completed. (3) is when the work is not completed until step 201.

Then, in the case of Fig. 7 (2), since the step 202 is finished, the inlet looper required amount 262 adds an extra time to the standard time required for the work from the step 203 to the step 206 on the inlet side. It becomes one. On the other hand, in the case of Fig. 7 (3), since only step 201 is completed, the inlet side looper amount 263 adds an extra time to the standard time required for the work from step 202 to step 206 on the inlet side. It becomes one.

Therefore, in the case of Fig. 7 (2), the looper required amount can be made smaller than in the case of Fig. 7 (1), and in the case of Fig. 7 (3), the looper required amount is larger than in the case of Fig. 7 (1). Needs to be.

In the inlet side speed difference setting device 10 and the outlet side speed difference setting device 11, the inlet side looper required amount which is a calculation result of the inlet side looper required amount calculating device 12 and the outlet side looper required amount calculating device 13 and The center equipment 2 setting speed is computed from the exit looper required amount and the looper amount performance difference computed by the inlet side looper amount calculating device 151 and the outlet side looper required amount calculating device 152.

Although FIG. 8 shows the outline | summary of the process by the exit speed difference setting apparatus 11 at this time, the same calculation is performed also by the entrance speed difference setting apparatus 10. FIG. Here, if there is a speed difference between the outlet facility 3 and the central facility 2 now, the exit looper accumulation amount changes in this case. Therefore, in order to keep the exit-side looper accumulation amount constant, it is necessary to set the speed difference to zero.

In addition, as described above, the continuous rolling equipment accelerates and decelerates according to any determined acceleration / deceleration rate. For this reason, an upper limit is given to a speed difference according to a looper accumulation amount. Therefore, when the speed difference with the center is Δ, it is necessary to decelerate as shown in Fig. 8 in order to set this speed difference Δ to zero. However, the looper accumulation amount of the area portion indicated in the looper accumulation amount change amount is changed at the time of deceleration.

Therefore, at this time, the speed difference upper limit AV shown in the following equation (2) is set according to the deviation? 1 between the looper required amount and the looper amount.

ΔV = √ (2α0 · Δ1)... (2)

Here, the accumulation amount of the inlet-side looper 4 is adjusted by the speed difference between the central facility 2 and the inlet facility 1, and the speed difference between the central facility 2 and the outlet facility 3 is adjusted. In order to adjust the accumulation amount of the outlet side looper 5, for example, when the outlet side equipment 3 is decelerated, the accumulation is started to the outlet side looper 5, but in this case, the outlet side equipment 3 is stopped. If the time is extended, the amount of accumulation of the outlet-side looper 5 may be insufficient.

In this case, therefore, it is necessary to lower the speed of the central equipment 2 in a certain range and to reduce the amount of looper accumulation per unit time of the outlet-side looper 5. The central speed setting device 14 executes this operation, and FIG. 9 shows the control by the central speed setting device 14.

As described above, the central equipment 2 mainly serves to perform chemical or thermal treatment on the rolled material, such as pickling and annealing, so that the processing time in the equipment, that is, the speed of the central equipment is increased. It becomes an important control element, and therefore, the speed in the central equipment 2 needs to be paid and controlled within a certain value range.

Here, this situation is shown in the upper side of FIG. 9. As shown in this case, the speed (hereinafter, referred to as a center speed) of the central equipment 2 is, in advance, the upper limit speed and the lower limit speed, and Normally, the use speed is set, and the upper limit speed and the lower limit speed are in the above-mentioned constant value range at this time.

And the center speed setting apparatus 14 sets the looper amount of the inlet side looper 4 and the outlet side looper 5, and the setting of the inlet side equipment 1 using the control rule shown to the lower side of FIG. The central speed is set according to the speed (hereinafter referred to as the inlet equipment speed), the set speed of the outlet equipment 3 (similarly, the outlet equipment speed), and the like so that the acceleration and deceleration within the upper and lower fixed value ranges are controlled. do.

First, when the acceleration / deceleration of the central equipment 2 is allowed, as in the control rules 1, 3, 4, 6, the deceleration or increase of the central speed is applied in accordance with the respective control rules.

On the other hand, as in the control rules 2, 5, and 7, when the looper amount does not improve even if the deceleration or increase of the central speed is applied, an alarm is displayed and the determination of how to deal with is delegated to the operator. At this time, various countermeasures are possible, for example, by operating the speed of the central equipment 2 beyond the upper and lower limits, or by keeping the situation of the fluctuation range even when the looper accumulation amount is up and down.

Therefore, according to the present embodiment, the speed of the inlet facility 1, the speed of the central facility 2, and also the speed of the outlet facility 3 are set automatically, and as a result the operator of the continuous rolling facility is operated. It can always obtain efficiently, without being influenced by skill.

Here, as shown in the above-described control rule 3, when the looper accumulation amount is within a predetermined appropriate range and the center speed is applied, the center speed setting device 14 may be configured to increase the outlet equipment speed as well. good. In the case of this embodiment, when the inlet equipment 1 finishes work efficiently, the speed of the outlet equipment 3, that is, the rolling speed, is increased as well as the increase of the central speed, thereby increasing the production efficiency. .

However, even in this case, it is necessary to make the speed change of the central installation 2 smaller than the normal acceleration / deceleration rate, and to suppress the influence on the product due to the acceleration / deceleration. As described above, in rolling mills, defects in product quality such as plate thickness fluctuations, tension fluctuations, and shape fluctuations usually occur due to acceleration and deceleration. Therefore, it is necessary to prevent it from accelerating and decelerating as much as possible.

Therefore, in embodiment of this invention, acceleration / deceleration rate (alpha) o is suppressed to 1/5-1/10 of acceleration / deceleration rate in normal continuous rolling equipment. In this case, the acceleration / deceleration rate that can follow the automatic sheet thickness control, the automatic tension control, and the automatic shape control can be set. Therefore, according to the present embodiment, it is possible to suppress the occurrence of a defect in quality.

By the way, although the above description was described as embodiment of this invention about the case where this invention was applied to the continuous rolling installation provided with an entrance facility, a central installation, and an exit facility, it is the difference between a some production facility and the speed between them. Needless to say, the present invention can be applied to equipment other than the continuous rolling equipment as long as it is a continuous production equipment having a product storage device for absorbing water.

According to the present invention, the speed of the inlet equipment and the speed of the central equipment in the continuous rolling equipment and the speed of the outlet equipment are automatically set, so that the operation of the continuous rolling equipment is always efficiently and efficiently without depending on the skill of the operator. You can get it.

Claims (6)

In the speed control method of the continuous processing equipment provided with the some equipment from which operation speed and operation timing differ, and the looper equipment for absorbing the difference of the driving speed between them, The product accumulation amount of the looper facility is determined from the operating state of the plurality of facilities, And controlling the operation speed of the plurality of facilities so that the actual product accumulation amount of the looper facility is the determined product accumulation amount. An inlet-side facility for supplying the material to be rolled, a central facility for processing the rolled material supplied from the inlet-side facility, an outlet-side facility for rolling the rolled material supplied from the central facility to a predetermined plate thickness, and the inlet side In the speed control method of the continuous processing installation provided with the inlet side looper arrange | positioned between a facility and the said central facility, and the outlet side looper arrange | positioned between the said central facility and the said outlet side facility, The required accumulation amount of the inlet side looper and the outlet side looper is calculated according to the predicted value and the performance value of the operation pattern of the inlet side equipment and the outlet side equipment, and the accumulation amount of the inlet side looper and the outlet side looper is calculated. And controlling the speed of the inlet facility and the control central facility, and the outlet facility therein so as to store the required accumulation amount. 3. The apparatus of claim 2, wherein the central plant comprises means for chemically treating and thermally treating the rolled material, wherein the speed of the central plant is within the allowable range required for at least one of the chemical treatment or the thermal treatment. Speed control method of a continuous processing facility, characterized in that the change. The method of setting a speed of a continuous processing facility according to claim 2, wherein the continuous processing facility includes a facility other than the inlet facility, the central facility, and the outlet facility. The speed setting method according to claim 2, wherein the speed control is performed for each of the facilities within an allowable range set in accordance with the processing performed at each facility. 6. The speed setting method of a continuous processing facility according to claim 5, wherein the speed change of each facility is performed based on a change rate set to such an extent that it does not affect product precision.

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