JP5636697B2 - Heating furnace charging order and extraction order / rolling order creation method, and heating furnace charging order and extraction order / rolling order creation device - Google Patents

Description

  In the present invention, after heating a plurality of slabs to be rolled in two or more heating furnaces, the slabs are hot-rolled by a rolling mill to produce a rolled product. Heating furnace charging order and extraction order / rolling order creation method, and heating furnace charging order and extraction order that optimally plan the charging order and extraction order of a plurality of slabs with respect to the furnace, respectively, and the rolling order by the rolling mill -It concerns a rolling order creation device.

  In the case of hot rolling a thick plate (slab) comprising a heating process with two or more heating furnaces and a rolling process with a rolling mill, when manufacturing a rolled product from a plurality of types of slabs, to each heating furnace of each slab material Allocation and charging order, and the planning of the rolling order by the heated slab rolling mill greatly affect production efficiency and production cost. However, such a plan is extremely complicated because there are many restrictions on heating and rolling depending on the material, width, thickness, etc. of each slab material. I had to rely on. For this reason, it took a lot of time for planning, and the labor burden on the workers was large. In addition, the variation of the plan contents was large depending on the workers, and it was difficult to say that it was always optimal.

  As a technique for solving the problems in planning the heating furnace charging order and rolling order as described above, for example, one described in Patent Document 1 is known. That is, Patent Document 1 describes a rolling order determination method capable of optimally assembling heating and rolling schedules with an emphasis on grouping of rolled materials having the same heating conditions. Here, first, a heating group that can be charged in the same heating furnace is formed in the heating group formation step, and a rolling group that can be simultaneously supplied to the rolling mill is formed in the rolling group formation step based on this heating group. To do. Then, the rolling order and the heating furnace are assigned in units of this rolling group.

  According to the method of Patent Document 1, since the rolling order and the allocation of the heating furnace are selected based on the grouping in consideration of the heating conditions, for example, slabs of the same heating condition in the same heating furnace due to quality problems, etc. In order to obtain excellent rolling efficiency while preferentially satisfying such heating conditions even when it is required to charge and heat only, the order of charging the slabs into the heating furnace It becomes possible to determine the rolling order by the rolling mill.

JP 2000-167610 A

  However, in a thick plate hot rolling facility including two or more heating furnaces and rolling mills, heating of a plurality of slabs having different heating times (for example, a hot piece slab and a cold piece slab, slabs having different thicknesses) and When rolling, the following problems occur. In other words, when performing heat rolling by mixing a slab with a short heating time and a long slab, aligning the heating completion timing of each slab with the timing of starting the rolling is the heating of the slab already charged in the heating furnace. Since time and rolling time are also involved, it is very difficult. In a hot rolling facility, if the timing of completion of heating is later than the timing of starting rolling, it is necessary to stop the rolling mill until the heating of the slab is completed. Remarkably deteriorates. Also, if the heating completion timing of the slab is earlier than the rolling start timing, it is necessary to wait the slab in the heating furnace until the rolling can be started, so that wasteful energy (fuel) is consumed by the heating furnace. The

  And in the technique described in patent document 1, the heating time and rolling time of the slab already charged in the heating furnace are not taken into consideration, and the heating of the slab charged in two or more heating furnaces is not considered. Nor is it assumed that the time will change in units of slabs. For this reason, when heating and rolling with a mixture of short slabs and long slabs, the order of charging the slabs into the heating furnace and the order of rolling in the rolling mill are in terms of production efficiency and quality. An optimal schedule cannot be created from a viewpoint.

  The object of the present invention is to extract the plurality of slabs from the heating furnace even when the heating time of the plurality of slabs charged in two or more heating furnaces changes in units of slabs in consideration of the above facts. Heating furnace charging order and extraction order / rolling that can optimally plan the charging order pattern and the extraction order pattern for the heating furnace and the rolling order pattern in the rolling mill so that the sum of the waiting time and rolling time is as short as possible. An object of the present invention is to provide an order creation method and a heating furnace charging order and extraction order / rolling order creation device.

The heating furnace charging sequence and extraction sequence / rolling sequence creation method according to the present invention includes the furnace data corresponding to the state of the slab charged in the heating furnace, the rolling type and the standard in-furnace determined for each slab. A data reading step for reading the operation standard data including time, the material slab data including the attributes of the slab, and a preset number of times, and the inside of the heating furnace based on the in-furnace data An extraction order pattern creating step for creating an extraction order pattern of the slabs in the furnace, and on the charging table for transporting the slab to the heating furnace based on the in-furnace data, the operation reference data and the material slab data and arrangement order pattern generation step of generating arrangement order patterns of the slab that, based on the arrangement order pattern and the extracting order pattern, to create a instrumentation Nyujun pattern to the heating furnace Both on the basis of the extracting order pattern and the operational reference data, and charging Jun及 beauty rolling sequence pattern generating step of generating a rolling sequence pattern by rolling mill, this time created charged Jun及 beauty rolling sequence pattern, compared to the best solutions are stored in the storage unit, when this created charged Jun及 beauty rolling sequence pattern rating higher than that of the best solution is charged Jun及 beauty rolled created this time stored in the storage unit forward pattern as a new best solutions, when this created charged Jun及 beauty rolling sequence pattern rating lower than that of the best solution is the stored in the storage unit top An evaluation and best solution update step for maintaining a good solution as it is, an array order pattern update step for creating a new array order pattern by changing the array order pattern created in the array order pattern creation step, The arrangement order pattern was the basis of the charging Jun及 beauty rolling sequence pattern times created, replaced by a new arrangement order pattern created by the arrangement order pattern updating step, the charging Jun及 beauty rolling sequence pattern created A step of repeatedly executing the evaluation, the best solution update step and the sequence order pattern update step over the designated number of times, and the step stored in the storage means after the end of the repetition step. And a best solution output step for outputting the best solution.
Further, stored in the heating RoSo Nyujun and extracting order-rolled order of creation method, the evaluation and best solutions update step, this time created arrangement order pattern and charged Jun及 beauty rolling sequence pattern, the storage means compared to the best solution is, if the currently created arrangement order pattern and charged Jun及 beauty rolling sequence pattern rating higher than that of the best solution is the arrangement order pattern and charged created this time stored in storage means Jun及 beauty rolling sequence pattern as the new best solution, if the currently created arrangement order pattern and charged Jun及 beauty rolling sequence pattern the evaluation than the best solution is low, the storage The best solution stored in the means is maintained as it is.

Further, the heating furnace charging sequence and extraction sequence / rolling sequence creation device according to the present invention includes in-furnace data corresponding to the state of the slab charged in the heating furnace, the rolling type and standard presence determined for each slab. Data reading means for reading operation standard data including furnace time, material slab data containing attributes of the slab, and a preset number of times, respectively, and a heating furnace based on the in-furnace data An extraction order pattern creating means for creating an extraction order pattern of the slabs within, and an arrangement on the charging table for transporting the slab to the heating furnace based on the in-furnace data, the operation reference data and the material source slab data the arrangement order pattern generating means for generating a sequence order pattern slabs to be, based on the arrangement order pattern and the extracting order pattern, thereby creating instrumentation Nyujun pattern to the heating furnace, Serial extracting order pattern and based on the operation reference data, and charging Jun及 beauty rolling sequence pattern generating means for generating a rolling sequence pattern by rolling mill, this time created charged Jun及 beauty rolling sequence pattern storage means compared to the best solutions are stored, in the case now created charged Jun及 beauty rolling sequence pattern the evaluation than the best solution is high, it is created this time was charged Jun及 beauty rolling sequence pattern was stored in the storage means as a new best solutions, when this created charged Jun及 beauty rolling sequence pattern rating lower than that of the best solution is the best solution stored in said storage means The sequence order pattern update means for creating a new sequence pattern by changing the sequence order pattern created by the sequence order pattern creation means, and the previously created device. input Jun及 beauty pressure The arrangement order pattern was the basis of the forward pattern, replaced by the new arrangement order pattern the arrangement order pattern updating means is created, the charged Jun及 beauty rolling sequence pattern creating means, the evaluation and best solution updating means And the repeated execution means for repeatedly executing the processing executed by the sequence order pattern updating means for the specified number of times, and the processing stored in the storage means after the processing executed by the repeated execution means is completed. And a best solution output means for outputting a good solution to the outside.
Further, stored in the heating RoSo Nyujun and extracting order-rolled order of creation apparatus, the evaluation and the best solution updating means, the current created arrangement order pattern and charged Jun及 beauty rolling sequence pattern, the storage means compared to the best solution is, if the currently created arrangement order pattern and charged Jun及 beauty rolling sequence pattern rating higher than that of the best solution is the arrangement order pattern and charged created this time stored in storage means Jun及 beauty rolling sequence pattern as the new best solution, if the currently created arrangement order pattern and charging Jun及 beauty rolling sequence pattern the evaluation than the best solution is low, the storage The best solution stored in the means is maintained as it is.

  According to the heating furnace charging sequence and extraction sequence / rolling sequence creation method, and the heating furnace charging sequence and extraction sequence / rolling sequence creation apparatus according to the present invention, a plurality of tubes charged in two or more heating furnaces Even when the heating time of the slab changes in units of slabs, the charging sequence pattern for the heating furnace and the heating furnace so that the sum of the waiting time for extraction from the heating furnace and the rolling time for a plurality of slabs is as short as possible. The extraction order pattern and the rolling order pattern in the rolling mill can be optimally planned.

It is a top view which shows typically the structure of the thick plate factory to which the heating furnace charging order and extraction order / rolling order preparation method which concerns on embodiment of this invention is applied. It is a figure which shows an example of the rollable position for every roll chance division. It is a flowchart which shows the processing flow of the heating furnace charging order and extraction order / rolling order preparation method performed with the heating furnace charging order and extraction order / rolling order preparation apparatus which concerns on embodiment of this invention. It is a block diagram which shows functionally the structure of the heating furnace charging order and extraction order / rolling order preparation apparatus which concerns on 1st embodiment of this invention. It is a top view which shows typically the state of the slab currently charged in the heating furnace and a heating furnace. It is a side view which shows typically the structure of the thick plate factory to which the heating furnace charging order and extraction order / rolling order creation method concerning embodiment of this invention is applied. (A) is a top view which shows typically the state of the heating furnace and the slab charged in the heating furnace, (B) is a figure which shows the charging pattern of the slab charged in the heating furnace. (A) is a plan view schematically showing the heating furnace and the state of the slab charged in the heating furnace, (B) is a diagram showing the charging pattern of the slab charged in the heating furnace, (C) FIG. 3 is a diagram showing an extraction pattern of slabs extracted from a heating furnace. (A) is a figure which shows the rolling pass schedule of each slab at the time of rolling several types of slab, (B) is a timing chart which shows the optimal rolling order of the slab shown by (A). (A) is a plan view schematically showing the heating furnace and the state of the slab charged in the heating furnace, (B) is a diagram showing the charging pattern of the slab charged in the heating furnace, (C) FIG. 3 is a diagram showing an extraction pattern of slabs extracted from a heating furnace. (A) is a plan view schematically showing the heating furnace and the state of the slab charged in the heating furnace, (B) is a diagram showing the charging pattern of the slab charged in the heating furnace, (C) FIG. 3 is a diagram showing an extraction pattern of slabs extracted from a heating furnace. (A) is a plan view schematically showing the heating furnace and the state of the slab charged in the heating furnace, (B) is a diagram showing the charging pattern of the slab charged in the heating furnace, (C) (D) And (E) is a figure which shows the extraction pattern of the slab extracted from a heating furnace. (A) is a plan view schematically showing the heating furnace and the state of the slab charged in the heating furnace, (B) is a diagram showing the charging pattern of the slab charged in the heating furnace, (C) (D) And (E) is a figure which shows the extraction pattern of the slab extracted from a heating furnace. (A) is a plan view schematically showing the heating furnace and the state of the slab charged in the heating furnace, (B) is a diagram showing the charging pattern of the slab charged in the heating furnace, (C) FIG. 3 is a diagram showing an extraction pattern of slabs extracted from a heating furnace. It is a figure for demonstrating the evaluation method of deviation DV with the actual rolling order of the slab with respect to RC standard. It is a figure for demonstrating the method to change the arrangement | sequence order pattern on a charging table using the method of a local search by making the order on the charging table already created into an initial solution. It is a block diagram which shows functionally the structure of the heating furnace charging order and extraction order and rolling order preparation apparatus which concern on 2nd embodiment of this invention. It is a figure for demonstrating the method of producing the temporary holding | grip unit with respect to a yard crane regarding the carrying-in scheduled slab of the arrangement | sequence order pattern on a charging table. It is a figure for demonstrating the method of creating a temporary slab mountain about a carrying-in slab from a temporary grip unit.

Hereinafter, a heating furnace charging order and extraction order / rolling order creation method and a heating furnace charging order and extraction order / rolling order creation apparatus according to an embodiment of the present invention will be described with reference to the drawings.
The plan view of FIG. 1 schematically shows the configuration of a thick plate factory to which a heating furnace charging order and extraction order / rolling order creation method according to an embodiment of the present invention is applied. In FIG. 1, a slab 12 manufactured by a continuous casting machine in a steelmaking factory is conveyed to a slab yard 10 by a trailer or the like. In the slab yard 10, roll chance categories and slabs classified according to sizes (slab sizes) related to a plurality of types of slabs 12 to be rolled, finished widths and finished thicknesses (rolled sizes) of rolled products manufactured from the slabs 12. Considering rolling restriction data describing the rolling type for 12 and the rolling position range of the slab 12 set for each roll chance category, the individual slabs are classified into a plurality and satisfy the mountain height restriction H. Piled up like so. In the following description, a plurality of slabs 12 stacked in the slab yard 10 as needed is referred to as “slab mountain 14”.

  The slab 12 of the slab mountain 14 is gripped by the yard crane 16 in order from the upper tier and moved onto the charging table 22. Here, the yard crane 16 grabs one or a plurality of slabs 12 from the slab mountain 14 within a range satisfying a predetermined gripping constraint condition of the crane, and normally, the slab 12 of one slab mountain 14 is plural times. It is divided and moved on the charging table 22. The yard crane 16 can be lifted at a time (maximum gripping weight: CG tons) and the sum of the thicknesses of the slabs 12 that can be gripped at a time (the maximum gripping slab thickness: TK mm). There is a restriction on the number of the lines. Therefore, the yard crane 16 holds one or more slabs 12 within a range that satisfies these constraints, that is, a moving unit that satisfies the crane gripping constraint conditions (hereinafter referred to as “grip unit”), and is in a standby stage. 18 is moved and stacked. In addition, since the yard crane 16 has the above-mentioned grasping restriction conditions, it is desirable that the slab mountain 14 is configured with as few grasping units as possible.

  The slabs 12 stacked on the standby stage 18 are sent one by one to the charging table 22 by the depiler device 20 and are transferred by the charging table 22 in the transfer direction (arrow FC direction). Then, the slab 12 conveyed on the charging table 22 is distributed and charged into the two heating furnaces 24 and 26. In FIG. 1, two heating furnaces 24 and 26 are installed in a plank factory, and each of the two heating furnaces 24 and 26 is provided with two rows of heating passages 28, 30, 32, and 34 in total. Shows the case. Here, the order pattern of the slabs 12 linearly arranged on the charging table 22 and conveyed one by one (hereinafter, this order pattern is referred to as “an ordering pattern on the charging table”) is expressed in yards. A plurality of patterns can be taken by changing the number of slabs 12 that the crane 16 grips at one time and the order in which the slabs 12 are gripped. The same applies when one or more heating furnaces are installed.

  The slab 12 charged in the heating furnaces 24 and 26 cannot be extracted from the heating furnaces 24 and 26 until the residence time in the heating furnaces 24 and 26 satisfies a predetermined reference in-furnace time (zt01 to zt53). Therefore, as shown in Table 1 below, a standard in-furnace time corresponding to the slab size (here, the thickness of the slab 12) and the slab temperature at the time of charging (charging slab temperature) is set in advance on the data table. In addition, it is preferable to allocate two (a pair) of slabs 12 to be simultaneously charged into the same heating furnaces 24 and 26 based on that. Thereby, it becomes possible to reduce the useless residence time while satisfying the standard in-furnace time of the pair of slabs 12 respectively.

  Table 1 shows a case where the slab 12 is classified into three types (t1, t2 and t3, where t1 <t2 <t3) depending on the thickness of the slab 12. The charging slab temperature (T1 to T5, where T1 <T2 <T3 <T4 <T5) is, as shown in Table 2 below, from the slab generation time when the slab 12 has been manufactured by the continuous casting machine, 26 is determined according to the time difference (st1 to st6, where st1> st2> st3> st4> st5> st6) until the heating furnace charging time is completed.

  The slab 12 that has been heated by the heating furnaces 24 and 26 is rolled by the rolling mill 36 in the order extracted from the heating furnaces 24 and 26. Here, the upper limit value of the number of slabs that can be rolled is determined according to the type of the rolling roll 38 used in the rolling mill 36, and the rolling roll 38 is replaced when the upper limit value is reached. The slab 12 to be rolled is a standard of a position (order) that can be rolled for each roll chance section (hereinafter referred to as “RC section”) between the upper limits of the number of slabs that can be rolled immediately after replacement of the rolling roll 38. Is decided.

The rolling mill 36 is provided with a standby facility 42 and a standby facility 44 on the front surface and the rear surface of the rolling stand 37, respectively, and an overtaking facility 46 to enable the preceding slab 12 to be overrolled. ing.
RC classification is a classification classified according to the rolling size (finishing width W1-W4 (however, W1>W2>W3> W4) and finishing thickness t) of the slab 12 (rolled product) after rolling, They are classified as shown in Table 3 below. Note that the RC classification method can be set as appropriate according to equipment specifications, operation conditions, and the like, and is not limited to the case of Table 3.

  Table 4 below shows an example of RC reference data defined by the rolling start position (start number) and end position (end number) after replacement of the rolling rolls 38 determined for each RC section. Moreover, the other example which illustrated the rolling possible position for every RC division is shown by FIG. In FIG. 2, the vertical axis represents the RC section, the horizontal axis represents the rolling position (the number of slabs 12 to be rolled after roll replacement), and 0 on the horizontal axis represents the replacement timing of the rolling roll 38. In FIG. 2, for example, in the case of RC section 0, rolling is performed in the range of the p3th to p6th rolling, and a maximum of n0 can be rolled during this time. In addition, rolling may be performed by mixing slabs of different RC sections within a range where the ranges of rolling positions overlap as in RC section 4 and RC section 6.

(First embodiment)
FIG. 3 shows an example of the processing flow of the heating furnace charging order and extraction order / rolling order creation method executed by the heating furnace charging order and extraction order / rolling order creation device according to the first embodiment of the present invention. It is shown. In FIG. 4, the configuration of the heating furnace charging order and extraction order / rolling order creation apparatus according to the present embodiment is functionally shown as a block diagram.

The heating furnace charging order and extraction order / rolling order creation method of the present embodiment is the charging order that achieves high efficiency from the viewpoints of both rolling (rolling mill 36) and heating (heating furnaces 24 and 26). The order of extraction and the order of rolling are created.
Here, from the viewpoint of rolling, the total rolling time is the minimum, that is, double rolling (the slab 12 is kept waiting in standby spaces provided on the front and rear surfaces of the rolling mill 36 to roll another slab 12). And overtaking rolling using the overtaking equipment 46 (see FIG. 1), and the slabs 12 of the same type of RC section are lined up.

From the viewpoint of heating, the extraction waiting time of the slab 12 is minimal, the slab 12 of the same size is heated in the same heating furnace 24, 26 as much as possible, or the extraction between the plurality of heating furnaces 24, 26 is completed. It is required that the timings are almost the same (four slabs 12 can be extracted simultaneously).
Moreover, regarding the slab 12 scheduled to be carried into the slab yard 10 from the steel factory, the number of movements of the yard crane 16 to the standby stage 18 is minimal, and the number of slab mountains 14 created in the slab yard 10 is the same. The minimum is required.
Hereinafter, based on the processing flow shown in FIG. 3, the heating furnace charging order and extraction order / rolling order creation method executed by the heating furnace charging order and extraction order / rolling order creation apparatus of the first embodiment of the present invention. Each step will be described in detail.

[Specified times input step (S2-1)]
In the designated number input step (S2-1), the data reading means 52 shown in FIG. 4 reads the preset designated number from the internal memory or the like, and inputs this designated number to the repeated execution means 66. Here, the designated number of times is the number of times of changing the order of the slabs 12 already arranged on the charging table 22 according to a predetermined rule, and the number of times of recreating the order of the slabs 12 arranged on the charging table 22. Means the sum of

[Step of reading in-furnace data and planning data (S2-2)]
In the step of reading the in-furnace data and the planning data (S2-2), the data reading means 52 reads the in-furnace data and the planning data from the host computer 40 that performs production management. Data is stored in the database 54. The planning data includes material slab data and operation standard data regarding a plurality of types of slabs 12 to be rolled. The planning data and the in-furnace data are stored in the database 54 in association with “plate numbers” (see Table 5) that are numbers for identifying individual slabs 12.

  Table 5 below shows an example of in-furnace data and planning data read by the data reading means 52. The material slab data includes the slab size (slab thickness and slab width) and slab weight (G1...), The RC classification classified according to the rolling size (finish width and finish thickness) for the slab 12, and the slab occurrence time. Slab yard arrival time, stacking time, mountain number and mountain number.

  Here, the slab generation time is the time when the slab 12 was cast by a continuous casting machine, the time when the slab was cut with a torch, the arrival time of the slab yard is the arrival time of the slab yard 10 or the expected arrival time, and the stacking time is the slab This means the time when the slab 12 carried into the yard 10 is stacked on the yard floor or another slab 12. Further, the mountain number is a number corresponding to the position of the slab mountain 14 in the slab yard 10, and the mountain number is a number indicating the step number of the slab 12 from the yard floor. Regarding the slab 12 to be carried in, the stacking time, peak number, peak number, reference furnace time, heating furnace charging time, furnace number, heating furnace extraction time, and rolling start time are blank.

  The operation reference data includes the pass schedule data of the slab 12 in the rolling mill 36 and the reference in-furnace time. The pass schedule data is determined by the computer 40 in association with the material slab data of the slab 12 and the rolling type, and is set for each slab 12 (plate number) to be rolled, as shown in Table 5, A rolling process 1, a cooling process 1, a rolling process 2, a cooling process 2 and a rolling process 3 are included. Here, (FR1...), (FC1...), (IR1...), (IR1...), (IR1) entered in the columns of rolling process 1, cooling process 1, rolling process 2, cooling process 2 and rolling process 3, respectively. LC1... And (LR1...) Represent the time required for each process. In addition, the reference in-furnace time in the operation reference data is a time length determined according to the slab size of the slab 12 and the charging slab temperature when charging into the heating furnaces 24 and 26 as described above (see Table 1). ).

The in-furnace data is data set only for the slab 12 already charged in the heating furnaces 24 and 26. As shown in Table 5, the heating furnace charging time, the numbers of the heating furnaces 24 and 26 (furnace No. 1 or 2), heating furnace extraction time (scheduled time) and rolling start time (scheduled time).
Here, the extraction time of the heating furnace is a time at which the slab 12 can be extracted from the heating furnaces 24 and 26. Actually, the slab 12 is removed from the heating furnaces 24 and 26 unless the rolling start time has elapsed. It cannot be extracted. Therefore, when the rolling start time is after the heating furnace extraction time, the difference between the heating furnace extraction time and the rolling start time becomes the standby time (extraction waiting time) of the slab 12 in the heating furnaces 24 and 26.

[Reading step of RC reference data and constraint condition (S2-3)]
In the RC reference data and constraint condition reading step (S2-3), the data reading means 52 performs RC classification on all slabs 12 to be subjected to the heating furnace charging order and extraction order / rolling order creation method from the source slab data. The grip constraint condition of the yard crane 16 and the height constraint condition of the slab mountain 14 are read. Charged Jun及 beauty rolling sequence pattern creating means 62 (see FIG. 4) determines the criteria for rollable position (order) of all of the slab 12 based on the RC segment data reading unit 52 has read.

As described above, the upper limit of the number of slabs that can be rolled is determined for the rolling roll 38 used in the rolling mill 36 according to the type of the rolling roll 38, and the rolling roll 38 is replaced when the upper limit is reached. Is done. As shown in FIG. 2, the slab 12 to be rolled has a reference (RC reference) of a position (order) that can be rolled for each RC section between the upper limit values of the number of slabs that can be rolled immediately after replacement of the rolling roll 38. It has been decided.
Note that the RC classification is not a constraint condition in hot rolling operation, and is positioned as a quality compliance condition that requires compliance as much as possible.

[Step for creating extraction sequence pattern of slab in furnace (S2-4)]
In the generation step (S2-4) of the extraction order pattern of the furnace slab, all the slabs in the heating furnaces 24 and 26 are extracted by the extraction order pattern creation means 56 based on the furnace number and the heating furnace extraction time in the furnace data. Twelve extraction order patterns are created. Here, the extraction order pattern of the in-furnace slab is, as shown in FIG. 5, when the four slabs 12 in the heating furnaces 24 and 26 reach the forefront line (KF = 1) on the outlet side. This is a calculation of how many of the four slabs 12 that have reached can be extracted.

  In FIG. 5, an arrow FF indicates the conveying direction of the slab 12 in the heating furnaces 24 and 26, and the interval between the pair of adjacent slabs 12 along the conveying direction is that the upstream slab 12 is unloaded. To the length of time until the downstream slab 12 can be carried out. For example, four slabs 12 positioned in the front row (KF = 1) along the transport direction can be extracted at the same time, but only two slabs 12 positioned at KF = 4 can be extracted at the same time. . Moreover, in this embodiment, since two slabs 12 can be simultaneously inserted into the two heating furnaces 24 and 26, the number of slabs 12 that are the minimum unit of charging and extraction with respect to the heating furnaces 24 and 26 is Think of it as two.

[Sequence pattern creation step on the charging table (S2-5)]
In the sequence order pattern creating step (S2-5) on the charging table, the sequence pattern creating means 58 shown in FIG. 4 arranges the sequence pattern of the slabs 12 arranged on the charging table 22 (array on the charging table). Order pattern).

  As shown in FIG. 6, the slabs 12 piled on the slab yard 10 are gripped by a yard crane 16 (see FIG. 1) for each predetermined number of moving units (gripping units) and provided on the upstream side of the charging table 22. Then, it is transported and stacked on the standby stage 18. The plurality of slabs 12 stacked on the standby stage 18 are crushed by the depiler device 20 and sent one by one from the lowermost slab 12 toward the uppermost slab 12 onto the charging table 22. . For example, four slabs 12 are included in one gripping unit, and the peak numbers of these slabs 12 are N, (N-1), (N-2), and (N-3) from the top. In this case, these slabs 12 are arranged in the order of (N-3), (N-2), (N-1), and N on the charging table 22.

In the case where the depiler device 20 is not installed and the slab 12 is sent from the standby stage 18 onto the charging table 22 by a crane or the like, one piece at a time from the uppermost slab 12 toward the lowermost slab 12 one by one. It is sent out onto the charging table 22.
The arrangement order pattern on the charging table satisfies the above-described gripping constraint conditions of the yard crane 16 and if the order 1 to M of the gripping units by the yard crane 16 shown in FIG. A simple pattern may be created.

[Best solution initialization step (S2-6)]
As shown in FIG. 4, the heating furnace charging order and extraction order / rolling order creation apparatus 50 includes a memory 60 for temporary storage for storing the best solution. In the best solution initialization step (S2-6), the arrangement order pattern creating means 58 initializes the memory 60 so that a new best solution can be stored.

[Charged Jun及 beauty rolling sequence pattern creating step (S2-7)]
In charging Jun及 beauty rolling sequence pattern creating step (S2-7), charged Jun及 Beauty rolling sequence pattern creating means 62 shown in FIG. 4, the furnace slab prepared in step (S2-4) extracting order patterns, and, together with on the basis of the arrangement order pattern on loading table created in step (S2-5), to create the instrumentation Nyujun pattern of the slab 12 to the heating furnace 24 and 26, due to the rolling mill 36 A rolling order pattern for the slab 12 is created.

  Here, the extraction order pattern of the in-furnace slab created in step (S2-4) corresponds to the order in which the slab 12 already charged in the heating furnaces 24 and 26 is extracted. In S2-7), it is handled as confirmed. On the other hand, the arrangement order pattern on the charging table created in step (S2-5) is the slab arranged on the charging table 22 after the charging order pattern, the extraction order pattern, and the rolling order pattern are created. Since there are 12 sequential patterns, it is possible to change them. And if the arrangement | sequence order pattern on a charging table changes, naturally, a charging order pattern, an extraction order pattern, and a rolling order pattern will also change.

  First, a method of creating a charging sequence pattern when charging the slab 12 into the heating furnaces 24 and 26 will be described. When four slabs 12 in the front row (KF = 1) are extracted at the same time in the heating furnaces 24 and 26 shown in FIG. ), The four slabs 12 (A1, A2, B1, B2) in the front row (KC = 1) of the charging order pattern table 90 shown in FIG. At this time, the time when the four slabs 12 (A1, A2, B1, B2) can be charged into the two heating furnaces 24, 26 is in the front row (KF = 1) of the heating furnaces 24, 26. It is assumed that it coincides with the final extraction time of the four slabs 12.

  The odd order region 92G and the even number region 94E are set in the charging order pattern table 90, and the slabs 12 arranged in the odd number region 92G are heated in order from the one in the front row (KC = 1). The slabs 12 charged in the furnace 24 and arranged in the even-numbered region 94E are charged into the other heating furnace 26 in order from the one in the front row (KC = 1).

At the same time, the four slabs 12 (A1, A2, B1, B2) charged in the heating furnaces 24, 26 can be extracted at the last four slabs in the heating furnaces 24, 26. 12 (KF = f) is the time when all are extracted. From the above, the heating time (final heating time) of the four slabs 12 (A1, A2, B1, B2) charged in the heating furnaces 24, 26 is calculated by the following equation (1).
(Future heating time) = (Final extraction time of four slabs 12 (KF = f)) − (Fillable time of four slabs 12 (A1, A2, B1, B2)) (1 )

Here, charging Jun及 Beauty rolling sequence pattern creating means 62, the reference stationary furnace time of four to be charged into the heating furnace 24 and 26 of the 2 groups slab 12 (A1, A2, B1, B2) and the The expected heating time obtained by the equation (1) is compared, and it is determined whether or not four slabs 12 (A1, A2, B1, B2) can be extracted after the expected heating time has elapsed. In the present embodiment, since the slab 12 is handled in units of two (pair) at the time of charging and extraction with respect to the heating furnaces 24 and 26, the reference in-furnace time is the longest of the reference in-furnace times of the pair of slabs 12. The thing is the criterion.

At this time, about the heating time of the four slabs 12 (A1, A2, B1, and B2) extracted from the heating furnaces 24 and 26, the following cases (a), (b), and (c) are considered.
(A) All four slabs 12 (A1, A2, B1, B2) satisfy the standard furnace time.
(B) Two slabs 12 in one of the heating furnaces 24 and 26 satisfy the standard in-furnace time, but the two slabs 12 in the other heating furnace 24 and 26 do not satisfy the standard in-furnace time (c) All of the four slabs 12 (A1, A2, B1, B2) in the two heating furnaces 24, 26 do not satisfy the reference in-furnace time.

  In the case of (a), when the four slabs 12 (A1, A2, B1, B2) reach the front row (KF = 1) of the heating furnaces 24, 26, all can be extracted simultaneously. In this case, as shown in the charging order pattern table 90 in FIG. 8B, the four slabs 12 (A1, A2, B1, B2) in the front row (KC = 1) are heated simultaneously. As shown in the extraction order pattern table 96 in FIG. 8C, four slabs 12 (A1, A2, B1, B2) can be simultaneously supplied from the heating furnaces 24, 26. Extraction is possible (however, extraction from the heating furnaces 24 and 26 to the rolling mill 36 is performed one by one in accordance with a predetermined order).

In the extraction order pattern table 96, as in the charging order pattern table 90, odd-numbered areas 98G and even-numbered areas 100E are set, and the slab 12 extracted from one heating furnace 24 is set in the odd-numbered areas 98G. Are arranged in order, and the slabs 12 extracted from the other heating furnace 26 are arranged in order in the even-numbered region 100E.
Further, in the charging order pattern table 90, a plurality of slabs 12 surrounded by a two-dot chain line CS indicate a combination of the slabs 12 that can be simultaneously charged into the heating furnaces 24 and 26. In the extraction order pattern table 96, A plurality of slabs 12 surrounded by a two-dot chain line ES indicates a combination of slabs 12 that can be simultaneously extracted from the heating furnaces 24 and 26.

In this case, the four slabs 12 (A1, A2, B1, B2) may be extracted from the heating furnaces 24, 26 in any order. For this reason, the combinations of the extraction orders 1 to 4 in which the rolling times of the four slabs 12 are the shortest are calculated, and the extraction times 1 to 4 are obtained for the respective slabs 12.
Specifically, for example, when the four slabs 12 (A1, A2, B1, B2) are rolled by the pass schedule shown in FIG. 9A, the four slabs 12 (A1, A2, When rolling B1 and B2) in the extraction order 1 to 4 shown in FIG. 9B, the rolling time (total rolling time) of the four slabs 12 (A1, A2, B1, and B2) can be minimized. . The “temperature control wait time” in FIG. 9A is the time until the subsequent rolling process can be started when the temperature of the slab 12 is adjusted after the completion of the previous rolling process.

  In the case of (b) above, as shown in the charging sequence pattern table 90 of FIG. 10 (B), four slabs 12 (A1, A2, B1, B2) are provided in the two heating furnaces 24, 26. However, as shown in the extraction order pattern table 96 of FIG. 10 (C), even if the in-furnace time of the two slabs 12 (B1, B2) in the even-numbered region 100E satisfies the reference in-furnace time. The in-furnace time of the two slabs 12 (A1, A2) in the odd region 98G may not reach the quasi-in-furnace time. Therefore, in this case, only two slabs 12 (B1, B2) can be extracted from the heating furnace 26.

For the (b), charged Jun及 Beauty rolling sequence pattern creating means 62, FIG. 10 two slabs 12 in the odd region 98G of extracting order pattern table 96 of (C) a (A1, A2), instrumentation is moved to even region 94E of Nyujun pattern table 90, we create a new Sonyujun patterns. This new instrumentation in Nyujun pattern, so that the two slabs 12 (A1, A2) is charged into the heating furnace 26.

  At this time, the two slabs 12 (B1, B2) in the even-numbered area 100E of the extraction order pattern table 96 in FIG. 10C satisfy the reference in-furnace time, and may be extracted in any order. Therefore, as in the case of the four slabs 12 (A1, A2, B1, and B2), the combination calculation of the extraction order that minimizes the rolling time is performed, and the extraction time for each slab 12 is obtained.

In the case of (b) above, after the two slabs 12 (B1, B2) are extracted from the heating furnace 26, the charging sequence pattern of the slabs 12 charged and extracted from the heating furnaces 24, 26 and The extraction order pattern will be described.
As shown in the loading order pattern table 90 of FIG. 11B, the four slabs 12 (C1, C2, D1, D2) follow the four slabs 12 (A1, A2, B1, B2). When charging at the same time, whether or not the four slabs 12 (C1, C2, D1, D2) charged in the heating furnaces 24, 26 satisfy the reference in-furnace time is determined by the two slabs 12 (B1 , B2) and the loading times of the four slabs 12 (C1, C2, D1, D2).

At this time, the following cases (b-1), (b-2) and (b-3) are conceivable.
(B-1) All four slabs 12 (C1, C2, D1, D2) satisfy the standard in-furnace time.
(B-2) One of the two slabs 12 (C1, C2) and the two slabs 12 (D1, D2) satisfies the reference in-furnace time, but the other does not satisfy the reference in-furnace time.
(B-3) All four slabs 12 (C1, C2, D1, D2) do not satisfy the standard in-furnace time.
For the (b-1) or (b-2), charged Jun及 Beauty rolled order of creation unit 62, as shown in FIG. 12 (C), after extraction of the slab 12 (B1, B2), 2 present It is determined whether two slabs 12 (D1, D2) or two slabs 12 (C1, C2) can be extracted (four extractions) simultaneously with the slabs 12 (A1, A2).

In this case, first, when the two slabs 12 (B1, B2) are extracted, both of the two slabs 12 (D1, D2) and the two slabs 12 (C1, C2) are present. A case where it is determined that the furnace time is satisfied will be described.
Charged Jun及 beauty rolled order of creation unit 62, first, as shown in FIG. 12 (D), simultaneously with the two slabs 12 (A1, A2), two slabs 12 (D1, D2) is simultaneously extracted When it is determined that it becomes possible, the extraction order pattern created by the insertion order pattern and the extraction order pattern creation means 56 is adopted as a part of the best solution (part of the constituent elements).

In addition, the two slabs 12 (A1, A2) and the two slabs 12 (D1, D2) cannot be extracted simultaneously, but the two slabs 12 (C1, C2) moved from the odd number region 92G to the even number region 94E. When it is determined that C2) can be extracted, the insertion order pattern and the extraction order pattern created by the extraction order pattern creation means 56 are adopted as a part of the best solution.
The charged Jun及 beauty rolled order of creation unit 62, simultaneously with the two slabs 12 (A1, A2), two slabs 12 (D1, D2) and two slab 12 (A1, A2) both of When it is determined that extraction is not possible, after extracting the two slabs 12 (B1, B2) as shown in the extraction order pattern table 96 of FIG. 12E, the two slabs 12 (D1, D2) are subsequently extracted. ) and instrumentation Nyujun patterns for extracting, after extracting the two slabs 12 (B1, B2), to create a subsequently instrumentation Nyujun pattern for extracting the two slabs 12 (C1, C2), The charging order pattern in which the total rolling time of the combined four slabs 12 becomes the shortest and the extraction order pattern created by the extraction order pattern creating means 56 are adopted as part of the best solution.

Next, in the case of the above (b-1) or (b-2), when the two slabs 12 (B1, B2) are extracted, only the two slabs 12 (D1, D2) are present. A case where the furnace time is satisfied and the two slabs 12 (C1, C2) do not satisfy the reference in-furnace time will be described.
Charged Jun及 beauty rolling sequence pattern creating means 62, first, as shown in FIG. 13 (D), simultaneously with the two slabs 12 (A1, A2), two slabs 12 (D1, D2) is extracted If it is determined that (four extraction) is possible, the extraction order pattern created by the insertion order pattern and the extraction order pattern creation means 56 is adopted as a part of the best solution.

The charged Jun及 beauty rolling sequence pattern creating means 62, simultaneously with the two slabs 12 (A1, A2), when it is determined not to extract the two slabs 12 (D1, D2), FIG. 13 (E) As shown in FIG. 5, after the two slabs 12 (B1, B2) are extracted, the slab 12 (D1, D2) is subsequently extracted by the loading order pattern and extraction order pattern creating means 56. The extracted order pattern is adopted as a part of the best solution.

Further, the four slabs 12 (c) (C1, C2, D1, D2) if does not meet all criteria stationary furnace time, charged Jun及 Beauty rolling sequence pattern creating means 62, FIG. 14 (B) As shown in FIG. 14 (C), the four slabs 12 (C1, C2, D1, D2) charged simultaneously into the heating furnaces 24, 26 are simultaneously transferred as shown in FIG. A charging order pattern and an extraction order pattern that are kept in the heating furnaces 24 and 26 until extraction is possible are adopted as part of the best solution.

Charged Jun及 beauty rolling sequence pattern creating means 62, the work of creating Sonyujun pattern as described above was performed for all the slab to be rolled target 12 (Material source slabs), all of the slab 12 after you create the instrumentation Nyujun pattern of, to create a rolling order pattern the total rolling time is the shortest. Then, charged Jun及 Beauty rolling sequence pattern creating means 62, Sonyujun pattern, extracting order pattern and based on the rolling sequence pattern, calculates all the charging time for the slab 12, extraction time and rolling start time respectively .

[Evaluation step of loading order, extraction order and rolling order pattern (S2-8)]
In the evaluation step (S2-8) of the charging order, extraction order and rolling order pattern, the evaluation and best solution updating means 64 is the charging order pattern, extraction order pattern and rolling order pattern created in (S2-7). Compute the objective function for. The objective function is defined as shown in the following equation (2).

(Objective function) = (total rolling time) + (heating furnace extraction waiting time) + (RC standard evaluation) (2)
The evaluation and best solution updating means 64 is the charging order in which the values calculated by the above formula (2) (referred to as “evaluation values”) for the charging order pattern, extraction order pattern and rolling order pattern are minimized. A pattern, an extraction order pattern, and a rolling order pattern are determined as the best solutions at that time.

  Here, the total rolling time is the time from the rolling start time to the rolling completion time of all slabs 12 to be rolled. The heating furnace extraction waiting time is a cumulative value of the difference between the intended heating time for each slab 12 and the reference in-furnace time. In addition, as shown in FIG. 15, the RC evaluation standard is an evaluation of the degree of deviation (deviation degree DV) from the actual rolling order of the slab 12 with respect to the given RC standard. Deviation degree DV is calculated by the following equation (3).

Deviation DV = A × ((value of upper limit or lower limit of RC built-in standard that is close to rolling order of target slab) − (rolling order of target slab)) ² ... (3)
Here, A is a weighting coefficient. However, when the rolling order of the target slab is between the upper limit value and the lower limit value of the RC incorporation standard, the deviation degree DV = 0. Further, in the example shown in FIG. 15, (the upper limit value or the lower limit value of the RC incorporation standard is a value close to the rolling order of the target slab) = 100 and (the rolling order of the target slab) = 98. Moreover, by defining the deviation degree DV by a quadratic function, the degree of deviation of the rolling order of the target slab with respect to the RC incorporation standard can be greatly evaluated and reflected in the evaluation value of the objective function.

[Best Solution Derivation Judgment Step (S2-9) and Best Solution Update and Storage Step (S2-10)]
In the best solution derivation determination step (S2-9), the evaluation and best solution update unit 64 stores the evaluation value of the best solution stored in the memory 60, the charging order pattern created this time, the extraction order pattern, and The evaluation value of the rolling order pattern is compared.

  In the update and storage step (S2-10) of the best solution, the evaluation values of the charging order pattern, the extraction order pattern, and the rolling order pattern created by the evaluation and best solution update means 64 this time are the evaluation values of the best solution. If it is determined that the value is smaller, the contents of the memory 60 are reset, and the loading order pattern, the extraction order pattern and the rolling order pattern created this time are stored in the memory 60 as new best solutions. Further, the evaluation and best solution updating means 64, when the evaluation values of the loading order pattern, the extraction order pattern and the rolling order pattern created this time are larger than the evaluation value of the best solution, Keep the good solution as it is.

[Specified number of repetitions determination step (S2-11) and number of repetitions counting step (S2-12)]
In the specified number of repetitions determination step (S2-11), the repetition execution means 66 compares the number of repetitions with the specified number of times, and if the number of repetitions has not reached the specified number of times, the step of counting up the number of repetitions (S2) In step -12), “1” is added (incremented) to the number of iterations, and if the actual number of iterations has reached the designated number, the processing routine is changed to the best solution output step (S2-14). Transition.

[Pattern Update Sequence on Placement Table (S2-13)]
In the arrangement order pattern update step (S2-13) on the insertion table, the arrangement order pattern update means 68 changes the arrangement order pattern on the insertion table created in step (S2-5).
Even when the arrangement sequence pattern update unit 68 newly creates an “array sequence pattern on the charging table”, the “sequence sequence pattern on the charging table” is created in the same manner as in step (S2-5). However, at that time, the arrangement order pattern update means 68 sets a new creation condition by adding a random element to the selection of the gripping unit of the yard crane 16, the selection of the slab mountain 14, and the like according to this new creation condition. Create an "sequence order pattern".

  Further, the arrangement order pattern update means 68 can change the “sequence order pattern on the insertion table” using a local search method with the order on the insertion table already created as an initial solution. In this case, first, the arrangement order pattern update means 68 is arranged on the “arrangement on the charging table” which is the basis of “the charging order pattern, the extraction order pattern and the rolling order pattern” stored in the memory 60 as the best solution. As shown in FIG. 16A, the “order pattern” is set as an initial solution, and a combination of “grip unit” and “movement destination” constituting this “sequence order pattern on the charging table” is created.

  Next, as shown in FIG. 16B, the array order pattern update unit 68 uses the “gripping unit” positioned in an arbitrary order (here, m-th) in the initial solution 70 as a reference, and this m-th “ The “grip unit” located at the (m + 1) th position adjacent to the “grip unit” is moved next to the gripping unit located at any other order (here, m−1). As a result, a new “sequence pattern 72 on the charging table” is created.

  The arrangement order pattern update means 68 evaluates the new “sequence order pattern 72 on the charging table”. At this time, if the evaluation of the new “sequence order pattern 74 on the charging table” is higher than the evaluation of “initial solution 70”, a new “sequence order pattern 72 on the charging table” is created next. Adopt as the basis of “in-order pattern, extraction order pattern and rolling order pattern”.

  When the evaluation of the new “sequence pattern 72 on the charging table” is lower than the evaluation of the “initial solution 70”, the sequence order pattern update means 68 performs the first time as shown in FIG. Execute the return process. In the first returning process, the m-1st “gripping unit” adjacent to the first moved “m + 1” “gripping unit” is moved to the next (front side) of the reference mth gripping unit. Let As a result, a new “sequence order pattern 74 on the charging table” is created.

The arrangement order pattern update means 68 evaluates the new “sequence order pattern 74 on the charging table”. At this time, if the evaluation of the “sequence order pattern 74 on the charging table” is higher than the evaluation of the “initial solution 70”, the “sequence order pattern 74 on the charging table” is created next by the “loading order pattern 74”. Adopt as a basis for “pattern, extraction order pattern and rolling order pattern”.
When the evaluation of the “array order pattern 74 on the charging table” is lower than the evaluation value of the “initial solution 70”, the array order pattern update means 68, as shown in FIG. A second return process is executed. In this second returning process, the m-2th “gripping unit” that is one distance away from the first moved “m + 1” “gripping unit” is next to the m-th gripping unit as a reference (front side). Move to. As a result, a new “sequence pattern 76 on the charging table” is created. The arrangement order pattern update means 68 evaluates the new “sequence order pattern 76 on the charging table”. At this time, if the evaluation of the “sequence order pattern 76 on the charging table” is higher than the evaluation of the “initial solution 70”, the “sequence order pattern 76 on the charging table” is created next, Adopt as a basis for “pattern, extraction order pattern and rolling order pattern”.

  In the above example of local search, after the “sequence order pattern on the charging table” is first changed, the return process is performed up to two times, but the return process may be repeatedly executed an arbitrary number of times. Is possible. If the evaluation does not become better than the evaluation of the initial solution 70 even if the return processing is repeatedly executed over an arbitrary number of times, the arrangement order pattern update unit 68, as described above, A new creation condition is set by adding a random element to the selection of the slab mountain 14, etc., and an “array order pattern on the charging table” is created according to the new creation condition.

[Best Solution Output Step (S2-14)]
In the best solution output step (S2-14), when the same number of loading order patterns, extraction order patterns, and rolling order patterns as the designated number are repeatedly created, the best solution output means 78 stores the best solution as the best solution. The charging order, extraction order, and rolling order pattern stored in 60 are output to the upper computer 40. The computer 40, for example, based on the charging order pattern, the extraction order pattern, and the rolling order pattern input from the best solution output means 78, the yard crane 16, the charging table 22, the heating furnaces 24 and 26, the rolling mill 36, and the like. The work plan data are respectively prepared and transmitted to information terminals (not shown) installed in the yard crane 16, the charging table 22, the heating furnaces 24 and 26, the rolling mill 36, etc. The work plan data is displayed via the information terminal.

  According to the heating furnace charging order and extraction order / rolling order creation method executed by the heating furnace charging order and extraction order / rolling order creation device according to the first embodiment of the present invention described above, Even when the reference in-furnace times of the plurality of types of slabs 12 charged in the heating furnaces 24 and 26 change in units of slabs, the waiting time for extraction from the heating furnaces 24 and 26 for the plurality of types of slabs 12 and rolling The charging order pattern and the extraction order pattern for the heating furnaces 24 and 26 and the rolling order pattern in the rolling mill 36 can be optimally planned so that the total rolling time (total rolling time) by the machine 36 becomes as short as possible.

  In addition, in the heating furnace charging order and extraction order / rolling order creation method, when evaluating the charging order pattern, the extraction order pattern and the rolling order pattern, the total rolling time + the heating furnace extraction waiting time is used as an evaluation criterion, Since the evaluation is based on the degree of deviation (deviation degree DV) from the actual rolling order of the slab 12 with respect to the RC standard, the rolling order of the slab 12 is deviated from the RC standard. It is possible to effectively prevent the quality of the rolled product from becoming unstable.

(Second embodiment)
Next, a heating furnace charging order and extraction order / rolling order creation method and a heating furnace charging order and extraction order / rolling order creation apparatus according to a second embodiment of the present invention will be described with reference to the drawings. The description of the same parts as those of the first embodiment of the present invention described above will be omitted.

  FIG. 17 shows an example of the processing flow of the heating furnace charging order and extraction order / rolling order creation method executed by the heating furnace charging order and extraction order / rolling order creation apparatus according to the second embodiment of the present invention. It is shown. This is the processing of the heating furnace charging order and extraction order / rolling order creation method executed by the heating furnace charging order and extraction order / rolling order creation device according to the first embodiment of the present invention shown in FIG. This corresponds to a flow, and steps (S3-1), (S3-2),..., (S3-14) in FIG. 17 are steps (S2-1) and (S2-2) in FIG. ),..., (S2-14).

  Hereinafter, based on the processing flow shown in FIG. 17, the heating furnace charging order and extraction order / rolling order creation method executed by the heating furnace charging order and extraction order / rolling order creation apparatus of the second embodiment of the present invention. Of these steps, steps (S3-8), (S3-9), and (S3-10) different from the first embodiment will be described in detail.

[Evaluation Step of Arrangement Order Pattern and Charging Order, Extraction Order, and Rolling Order Pattern (S3-8)]
In the evaluation step (S3-8) of the arrangement order pattern and the charging order, the extraction order, and the rolling order pattern, the evaluation and best solution update means 64 is arranged in the order on the charging table created in (S3-5). The objective function is calculated for the pattern, the loading order pattern, the extraction order pattern, and the rolling order pattern created in (S3-7). The objective function is defined as shown in the following equation (4).
(Objective function) = (total rolling time) + (heating furnace extraction waiting time) + (RC standard evaluation) + (scheduled slab tentative number) (4)

  The evaluation and best solution update means 64 has a minimum value (referred to as “evaluation value”) calculated by the above formula (4) for the arrangement order pattern, the loading order pattern, the extraction order pattern, and the rolling order pattern. The arrangement sequence pattern, the loading sequence pattern, the extraction sequence pattern, and the rolling sequence pattern are determined as the best solution at that time.

  Here, the total rolling time is the time from the rolling start time to the rolling completion time of all slabs 12 to be rolled. The heating furnace extraction waiting time is a cumulative value of the difference between the intended heating time for each slab 12 and the reference in-furnace time. In addition, as shown in FIG. 15, the RC evaluation standard is an evaluation of the degree of deviation (deviation degree DV) from the actual rolling order of the slab 12 with respect to the given RC standard. The divergence degree DV is calculated by the above-described equation (3).

The number of temporary slabs to be carried in is a value for evaluating the efficiency of the yard crane 16 with respect to the slab to be carried into the slab yard 10 from the steel factory. The number of slab tentative slabs to be carried in is calculated according to the following procedure.
First, a temporary gripping unit for the yard crane 16 is created for a slab to be carried in an arrangement order pattern on the charging table. FIG. 18 is a diagram showing an example of creating a temporary grip unit. It is assumed that the temporary gripping unit satisfies all the following constraints (a) to (c).
(A) Adjacent slabs must be unloaded slabs (b) Own slab width ≧ adjacent slab width (c) Temporary gripping unit satisfies the constraints of the yard crane 16

  In FIG. 18, in the example 18-1, the slab A 2 adjacent to the slab A 1 is a slab mountain slab. Therefore, the slab A 1 is a temporary gripping unit based on the constraint conditions. The example 18-2 is an example in which the slabs A5, A6, A7, and A8 are used as temporary gripping units because the constraint condition is not satisfied with the slab A9 since the slab A5 is started. The above is performed for all the arrangement order patterns on the charging table, and a temporary grip unit is created.

A temporary slab mountain is created for the planned slab from the temporary grip unit created above. FIG. 19 shows an example of creating a temporary slab mountain, and shows an arrangement order pattern in (temporary) gripping units on the charging table in a state where the temporary gripping units are created. The temporary slab mountain is created by satisfying the following constraints (a) to (c).
(A) Do not mix with existing slab mountain (b) Do not mix RC (c) Height of temporary slab mountain (sum of slab thickness) does not exceed mountain height constraint H

In FIG. 19, 19-1 is an example in which a temporary slab mountain 19-2 is created using the temporary gripping unit 1 as a temporary slab mountain creation start point. As shown in 19-1, the constraint condition with the (provisional) grabbing unit in the ascending order of the arrangement order in the (provisional) grabbing unit is checked, and those satisfying the constraint are regarded as the same temporary slab mountain. The provisional slab mountain is defined as the temporary gripping unit when the height limit of the temporary slab mountain or the upper limit of the number of violations of the constraint is exceeded.
The number of temporary slab hills created above is set as the number of slab tentative slabs to be carried in according to Equation (4).

[Best Solution Derivation Judgment Step (S3-9) and Best Solution Update and Storage Step (S3-10)]
In the best solution derivation determination step (S3-9), the evaluation and best solution update means 64 stores the evaluation value of the best solution stored in the memory 60, the arrangement order pattern on the charging table created this time, The evaluation values of the charging order pattern, the extraction order pattern, and the rolling order pattern are compared.

  In the best solution update and storage step (S3-10), the evaluation and best solution update means 64 evaluates the arrangement order pattern, the insertion order pattern, the extraction order pattern, and the rolling order pattern on the charging table created this time. When it is determined that the value is smaller than the evaluation value of the best solution, the contents of the memory 60 are reset, and the arrangement order pattern, the charging order pattern, the extraction order pattern, and the rolling order pattern on the charging table created this time are displayed. Save in memory 60 as the new best solution. The evaluation and best solution update means 64 is used when the evaluation value of the arrangement order pattern, the insertion order pattern, the extraction order pattern, and the rolling order pattern on the charging table created this time is larger than the evaluation value of the best solution. Maintains the best solution stored in the memory 60 as it is.

  According to the heating furnace charging order and extraction order / rolling order creation method executed by the heating furnace charging order and extraction order / rolling order creation apparatus according to the second embodiment of the present invention described above, In addition to the effects of the embodiment, for the slab 14 scheduled to be carried into the slab yard 10 from the steel factory, a temporary gripping unit, a slab mountain is created and the number of temporary slab mountains is used as an evaluation criterion. The number of movements to the 16 standby stages 18 can be made efficient.

10 slab yard 12 slab 14 slab mountain 16 yard crane 18 standby stage 20 depiler device 22 charging table 24, 26 heating furnace 30, 32, 34, 36 heating passage 36 rolling mill 38 rolling roll 40 computer 42, 44 standby equipment 46 additional Yue equipment 50 heating RoSo Nyujun and extracting order-rolled order of creation unit 52 data reading means 54 database 56 extracting order pattern creating means 58 arrangement sequence pattern creating means 60 memory 62 charged Jun及 beauty rolling sequence pattern creating means 64 evaluate and Best solution update means 66 Repetitive execution means 68 Array order pattern update means 70 Initial solution 72, 74, 76 Array order pattern on the charging table 78 Best solution output means 90 Loading order pattern table 92G Odd area 94E Even area 96 Extraction order pattern table 98G Number area

Claims (4)

In-furnace data corresponding to the state of the slab charged in the heating furnace, operation standard data including the rolling type and standard in-furnace time determined for each slab, and material sources containing the attributes of the slab A data reading step for reading slab data and a preset number of times, respectively,
An extraction order pattern creating step for creating an extraction order pattern of the slab in the heating furnace based on the in-furnace data;
Based on the in-furnace data, the operation reference data and the material source slab data, an arrangement order pattern creating step for creating an arrangement order pattern of slabs arranged on a charging table for transporting the slab to the heating furnace,
Charged based on the arrangement order pattern and the extracting order pattern, thereby creating instrumentation Nyujun pattern to the heating furnace, which, based on the extracted sequence pattern and the operational reference data, to create a rolling sequence pattern by rolling mill and Jun及 beauty rolling order pattern creating step,
This time created charged Jun及 beauty rolling sequence pattern, compared to the best solution stored in the storage means, is higher rated than the currently created charged Jun及 beauty rolling sequence pattern the best solution the stores in the storage means the current created charged Jun及 beauty rolling sequence pattern as the new best solution, is lower rating than currently created charged Jun及 beauty rolling sequence pattern the best solution if In this case, an evaluation and best solution update step for maintaining the best solution stored in the storage means as it is,
An array order pattern update step of changing the array order pattern created in the array order pattern creating step to create a new array order pattern;
The arrangement order pattern was the basis of the charging Jun及 beauty rolling sequence pattern previously created, replaced by the new arrangement order pattern created by the arrangement order pattern updating step, the charging Jun及 beauty rolling sequence pattern created Repeatedly executing the step, the evaluation and the best solution update step and the sequence order pattern update step over the specified number of times,
A best solution output step of outputting the best solution stored in the storage means after completion of the repeated execution step;
A heating furnace charging order and extraction order / rolling order creation method. The evaluation and best solutions update step, this time created arrangement order pattern and charged Jun及 beauty rolling sequence pattern, compared to the best solutions are stored in the storage means, this created arrangement order pattern and when charging Jun及 beauty rolling sequence pattern the evaluation than the best solution is high, and stored in the storage means created this time sequence order pattern and charged Jun及 beauty rolling sequence pattern as the new best solution, We created this time sequence order pattern and charged Jun及 beauty rolling sequence pattern wherein when rating than optimal solution is low, the best solutions are stored in the storage means in which it maintains The heating furnace charging order and extraction order / rolling order creation method according to claim 1. In-furnace data corresponding to the state of the slab charged in the heating furnace, operation standard data including the rolling type and standard in-furnace time determined for each slab, and material sources containing the attributes of the slab A data reading means for reading the slab data and a predetermined number of times set in advance;
Extraction order pattern creating means for creating an extraction order pattern of the slab in the heating furnace based on the in-furnace data;
Based on the in-furnace data, the operation reference data and the material source slab data, an arrangement order pattern creating means for creating an arrangement order pattern of slabs arranged on a charging table for transporting the slab to the heating furnace,
Charged based on the arrangement order pattern and the extracting order pattern, thereby creating instrumentation Nyujun pattern to the heating furnace, which, based on the extracted sequence pattern and the operational reference data, to create a rolling sequence pattern by rolling mill and Jun及 beauty rolling order pattern creating means,
This time created charged Jun及 beauty rolling sequence pattern, compared to the best solution stored in the storage means, is higher rated than the currently created charged Jun及 beauty rolling sequence pattern the best solution the stores in the storage means the current created charged Jun及 beauty rolling sequence pattern as the new best solution, is lower rating than currently created charged Jun及 beauty rolling sequence pattern the best solution if In this case, an evaluation and best solution update unit for maintaining the best solution stored in the storage unit as it is,
An array order pattern update means for changing the array order pattern created by the array order pattern creating means and creating a new array order pattern;
The arrangement order pattern was the basis of the charging Jun及 beauty rolling sequence pattern previously created is replaced with the new arrangement order pattern the arrangement order pattern updating means is created, the charged Jun及 beauty rolling sequence pattern created Means for repeatedly executing the evaluation and the best solution update means and the processing performed by the arrangement order pattern update means over the designated number of times,
The best solution output means for outputting the best solution stored in the storage means to the outside after the processing executed by the repeated execution means is completed;
A heating furnace charging order and extraction order / rolling order creation apparatus. The evaluation and the best solution updating means, the current created arrangement order pattern and charged Jun及 beauty rolling sequence pattern, compared to the best solutions are stored in the storage means, this created arrangement order pattern and when charging Jun及 beauty rolling sequence pattern the evaluation than the best solution is high, and stored in the storage means created this time sequence order pattern and charged Jun及 beauty rolling sequence pattern as the new best solution, We created this time sequence order pattern and charged Jun及 beauty rolling sequence pattern wherein when rating than optimal solution is low, the best solutions are stored in the storage means in which it maintains The heating furnace charging order and extraction order / rolling order creation apparatus according to claim 3.

Images