JP2017033407A - Purification plan generation device, purification plan generation method and purification plan generation program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily generate a purification plan to which insert sequence into a purification line is properly attached even in a case in which a large amount of slabs is an object.SOLUTION: A purification plan generation device 1 is equipped with a calculation device 10 that includes: an earliest insert date and time calculation part which calculates an earliest insert date and time at which a slab can be inserted into purification lines 30a-30d earliest from a sending position of a plurality of slabs 3; a latest insert date and time calculation part which calculates a latest insert date and time at which the slab is inserted into the purification lines 30a-30d so as to attain a scheduled thermal pressure data and time; an objective allocation slab extracting part for extracting a slab that satisfies a certain condition; a process sequence imparting part for imparting a sequence to the objective allocation slab; a process data and time imparting part for imparting a scheduled process finish data and time of a purification process to the objective allocation slab; and a purification plan generation part which extracts the slab that satisfies the certain condition from the objective allocation slab and generates the purification plan.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a refining plan creation apparatus, a refining plan creation method, and a refining plan creation program for creating a priority order of a plurality of slabs inserted in a refining line when refining the surface of a slab.

Conventionally, in steelworks, slabs are cut from slabs cast by continuous casting equipment, and the surface of the slabs is subjected to care such as cutting and grinding according to the dimensions and standards of the ordered products (refining treatment). ) To remove wrinkles and scales on the surface (see Patent Document 1). The slab that has been subjected to the refining process is subjected to a hot rolling process, a cold rolling process, or the like in the lower process, and finally becomes a product having a desired quality.
The slab is sequentially inserted into the finishing line that performs the finishing process, but when creating a finishing plan that includes the order of loading the slab, the scheduled date and time when the hot rolling process in the lower process is performed is set. Both slabs must be able to be achieved. Further, since the operator working on the finishing line changes every predetermined work cycle, the slab planned for a certain working cycle needs to be finished within the working time of the working cycle.

However, even if a finishing plan is created in advance before the finishing process, for example, an unscheduled slab for handling an express order may be suddenly allocated to the finishing line. At this time, for unscheduled slabs, it is necessary to interrupt the work on the finishing line in time for the hot rolling process, and for other slabs planned to be processed after this slab. Will have to re-examine the order and recreate the entire refinement plan.
In other words, even a refined plan that has been created once may need to be recreated within a short time according to the progress of the operation. This re-creation can occur repeatedly within a short time. Therefore, for example, if a long-term refinement plan is created for a large number of slabs such as 2000 or 3000, it takes time and effort to recreate the refinement plan according to the amount of slabs. There is a problem that the burden on the person becomes very large.

JP 2014-010004 A

  The present invention has been made paying attention to the above-mentioned problem, and even when a large amount of slabs are targeted, it is easy to make a refining plan with an appropriate order of loading into a refining line. An object is to provide a refined plan creation device, a refined plan creation method, and a refined plan creation program that can be created.

  In order to solve the above-described problems, an aspect of the refinement plan creating apparatus according to the present invention can insert a slab earliest into a refining line for refining a plurality of slabs from a delivery position of the plurality of slabs. The earliest charging date and time calculation part that calculates the earliest charging date and time, and the latest charging date and time for charging the slab to the finishing line so that the hot pressing scheduled date and time for performing the hot rolling after the finishing treatment can be achieved. The latest loading date and time calculation unit to calculate and the date and time when the processing time required for each slab refining process from the earliest charging date and time has arrived within the working time of the work cycle for performing the refining process Slab extraction unit for extracting the slab as the allocation target slab, the processing order giving unit for assigning the order to the allocation target slab in the order of the latest loading date and time, and the order and each process for the allocation slab According to time The processing date and time giving unit that gives the scheduled processing end date and time of the refining process, and the slabs whose processing end scheduled date and time arrives within the work time of the work cycle are extracted from the allocation target slabs as the allocation slabs, and the allocation slabs are processed in order The gist of the invention is to provide an arithmetic unit having a refining plan creation unit that creates a refining plan for a cycle.

  Further, according to one aspect of the method for preparing a refining plan of the present invention, the earliest charging date and time calculation unit inserts a slab earliest into a refining line for refining a plurality of slabs from a delivery position of a plurality of slabs. A step of calculating the earliest possible charging date and time, and the latest charging date and time calculation unit to load the slab into the finishing line so as to achieve the scheduled hot press date and time for hot rolling after the finishing treatment. The step of calculating the delay loading date and time, and the work cycle work in which the date and time when the processing time required for the respective slab refining processing has elapsed from the earliest loading date and time to the allocation target slab extraction unit Extracting slabs that arrive in time as allocation target slabs, processing order giving unit to assigning order to allocation target slabs in order of the latest loading date and time, processing date giving unit A step for assigning the scheduled processing end date and time of the refining process to the allocation target slab according to the order and each processing time, and the processing end scheduled date and time arrives within the working time of the work cycle in the refining plan creation unit The slab is extracted from the allocation target slab as the allocation slab, and the allocation slab is created as a work plan refinement plan together with the order.

  Further, according to one aspect of the refining plan creation program of the present invention, the earliest charging date and time calculation unit inserts a slab earliest into a refining line for refining a plurality of slabs from a delivery position of a plurality of slabs. A step of calculating the earliest possible charging date and time, and the latest charging date and time calculation unit to load the slab into the finishing line so as to achieve the scheduled hot press date and time for hot rolling after the finishing treatment. The step of calculating the delay loading date and time, and the work cycle work in which the date and time when the processing time required for the respective slab refining processing has elapsed from the earliest loading date and time to the allocation target slab extraction unit Extracting the slabs that arrive in time as allocation target slabs, causing the processing order assigning unit to assign an order to the allocation target slabs in the order of the latest loading date and time, and processing dates and times To assign the scheduled finishing date and time of the finishing process according to the order and each processing time to the allocation target slab, and to the finishing plan creation part, the scheduled processing end date and time is within the working time of the work cycle. The slab that arrives at is extracted from the allocation target slab as an allocation slab, and the processing is executed by a computer processing unit including a step of creating the allocation slab as a refinement plan of a work cycle together with an order.

  Therefore, according to the refinement plan creation device, the refinement plan creation method, and the refinement plan creation program according to the present invention, even when a large amount of slabs are targeted, the order of charging into the refinement line is appropriately set. The attached refinement plan can be easily created.

It is a block diagram which illustrates typically the outline of the structure of the refinement plan creation apparatus which concerns on embodiment of this invention. It is a figure which illustrates typically the facility of the steelworks to which the refinement plan creation apparatus which concerns on embodiment of this invention is applied. It is a block diagram explaining the outline of the composition of an arithmetic unit typically. It is a figure explaining an example of the data of the population prepared by the refinement plan creation process which concerns on embodiment of this invention. It is a figure explaining an example of the data of the earliest loading date (EST) calculated by the refinement plan creation process which concerns on embodiment of this invention. It is a figure explaining an example of the data of the latest loading date and time (LST) calculated by the refinement plan creation process which concerns on embodiment of this invention. It is a figure explaining an example of the data of the allocation object slab created by the refinement plan creation process concerning an embodiment of the invention. Schematic of a state in which ESTs, LSTs, and processing times of allocation target slabs created in the refinement plan creation process according to the embodiment of the present invention are arranged in the order of arrival of ESTs in a work cycle shown over time. FIG. It is a figure explaining the state which rearranged the data of the allocation object slab created by the refinement plan creation processing concerning an embodiment of the invention in order of LST arrival. The EST, LST, and processing time of the allocation target slab created in the refinement plan creation process according to the embodiment of the present invention are rearranged in the order of arrival of the LST in the work cycle shown over time. It is a figure explaining typically. It is a figure explaining an example of the data of the process start scheduled date and time and the process end scheduled date calculated by the refinement plan creation process which concerns on embodiment of this invention. Along with the EST, LST, and processing time, in the work cycle showing the scheduled processing start date and time and scheduled processing end date and time of the allocation target slab created in the refinement plan creation process according to the embodiment of the present invention It is a figure explaining typically. It is a figure explaining an example of the data of the slab allocated to the refinement plan created by the refinement plan creation process which concerns on embodiment of this invention. It is a figure explaining an example of the data of the population prepared by the refinement plan creation process which concerns on embodiment of this invention performed with respect to a subsequent work cycle. It is a flowchart explaining the refinement plan creation process which the refinement plan creation apparatus which concerns on embodiment of this invention performs. It is a figure explaining an example of the data of the allocation object slab created by the refinement plan creation process which concerns on embodiment of this invention performed with respect to a subsequent work cycle. In the work cycle in which the EST, LST, and the processing time of the allocation target slab created in the refinement plan creation process according to the embodiment of the present invention executed for the subsequent work cycle are shown over time, It is a figure which illustrates typically the state arranged in order of EST arrival.

  Embodiments of the present invention will be described below. In the following description of the drawings, the same or similar parts are denoted by the same or similar reference numerals. However, the drawings are schematic, and it should be noted that the relationship between the thickness and the planar dimensions, the ratio of the thickness of each device and each member, and the like are different from the actual ones. Therefore, specific thicknesses and dimensions should be determined in consideration of the following description. Moreover, it is a matter of course that portions having different dimensional relationships and ratios are included between the drawings. Also, the directions of “left and right” and “up and down” in the following description are merely definitions for convenience of description, and do not limit the technical idea of the present invention. Thus, for example, if the paper is rotated 90 degrees, “left and right” and “up and down” are read interchangeably, and if the paper is rotated 180 degrees, “left” becomes “right” and “right” becomes “left”. Of course.

-Structure of the refinement plan creation device-
As shown in FIG. 1, the refinement plan creating apparatus 1 according to the embodiment of the present invention is a refinement plan for performing a refinement process on a plurality of slabs 3 in order with the refinement lines 30 a to 30 d. Is a computer system comprising: a computing device 10 that creates a refined plan; a refined plan database 11 that stores the created refined plan; and terminals 32a to 32d that output the refined plan. The arithmetic device 10 is a central processing unit (CPU) or processor of a computer, and a data storage device 51 and an input device 52 are connected to the arithmetic device 10.

The refinement plan creation apparatus 1 includes a casting plan database 21 in which a cooling start date and time that is a scheduled date and time for starting the cooling process of the slab 3 manufactured by the continuous casting equipment 20 connected to the arithmetic device 10 is stored. Further, the finishing plan creation device 1 is connected to the arithmetic device 10 and the hot-pressure plan in which the scheduled hot-pressing date, which is the scheduled date and time for performing the hot rolling processing of the slab 3 after the finishing processing in the hot rolling equipment 40, is stored. A database 41 is provided.
The data storage device 51 stores data of all the slabs 3 that are subjected to the refining process. The data of the slab 3 can be configured by using the same data stored in a basic database (not shown) managed by, for example, an upper computer of a steel mill. The arithmetic unit 10 is configured to be able to access each data stored in the core database, the finishing plan database 11, the casting plan database 21, the heat pressure plan database 41, and the data storage device 51.

  Further, a terminal 22 for an operator of the continuous casting facility 20 is connected to the casting plan database 21, and information such as a scheduled casting date and time and a cooling start date and time of each slab 3 is input by the operator via the terminal 22. And stored. Further, a terminal 42 for an operator of the hot rolling facility 40 is connected to the hot pressure plan database 41, and information such as a scheduled date and time of each slab 3 is input and stored by the operator via this terminal 42. . The finishing plan creation device 1 takes into account the scheduled cooling date and time of the cooling process that is performed immediately before the finishing process and the scheduled hot press time and date of the hot rolling process that is performed immediately after the finishing process. Create a plan.

First, equipment in a steelworks to which a finishing plan creation device 1 according to an embodiment of the present invention is applied will be schematically described. As shown on the upper left side in FIG. 2, a continuous casting facility 20 for manufacturing the slab 3 is provided in the premises of the steelworks, and four finishing lines 30 a are provided downstream of the continuous casting facility 20. ˜30d are provided. Further, a finishing yard not shown is provided in the vicinity of the entrance side where the slabs 3 of the four finishing lines 30a to 30d are inserted. The four finishing yards are places where the slabs 3 fed from the continuous casting equipment 20 or the three slab stock yards 60a to 60c are kept before being put into the corresponding finishing line.
A hot rolling facility 40 is provided on the downstream side of the four finishing lines 30a to 30d. In addition, three slab stock yards 60a to 60c for storing the slab 3 are provided in the premises of the steelworks. The number of stock yards is not limited to three and can be changed as appropriate.

In the continuous casting facility 20, the slab 3 is manufactured by separating and cutting a slab cast by a continuous casting machine that omits the reference numerals, using a gas torch or the like. The continuous casting facility 20 is provided with a heat treatment facility (cooling facility) including a cooling bed (not shown), and the slab 3 manufactured by the continuous casting facility 20 is cooled to a certain temperature by the heat treatment facility. A cooling process is performed.
As shown in FIG. 2, a transport facility 120 for transporting the slab 3 is provided between the heat treatment facility and the respective trim yards of the four trim lines 30 a to 30 d. In FIG. 2, one transport cart is illustrated as the transport facility 120, but the transport facility 120 can be configured by appropriately combining other transport devices such as a transport crane (not shown). The slab 3 cooled by the heat treatment equipment is directly sent out to the finishing line in which necessary finishing processing is performed among the four finishing lines 30a to 30d via the transport equipment 120, or the continuous casting equipment 20 is used. It is transported as a stock to a continuous casting stock yard 60a that stores the slab 3 for which further downstream processing or hot rolling processing is not planned.

In FIG. 2, the three slab stock yards 60a to 60c are a continuous cast stock yard 60a provided on the exit side of the continuous casting facility 20, and a temporary stock yard 60b provided at an arbitrary location in the steelworks building. And an off-site stock yard 60c provided at an arbitrary location outside the building. Between the continuous cast stock yard 60a and the four finishing yards, a transport facility 160a composed of a transport cart, a transport crane, or the like is provided.
Further, as in the case of the continuous casting stock yard 60a, a transport facility 160b for the slab 3 is provided between the temporary storage stock yard 60b and the four finishing yards. In addition, the off-site stock yard 60c illustrated below the temporary stock yard 60b in FIG. 2 stores, for example, the slab 3 transported by a ship or the like from a place such as another steel mill far from the steel mill. it can. A transfer facility 160c for the slab 3 is also provided between the off-site stock yard 60c and the four finishing yards, as in the case of the continuous casting stock yard 60a.

Of the four finishing lines 30a to 30d, the first finishing line 30a shown in the uppermost stage in FIG. 2 is provided with a cutting device composed of a warm scarf machine (WSM), etc. A cleaning process is performed in which a high-temperature flame is sprayed on the surface of the slab 3 at about 0 ° C. to scour defects such as burrs.
In the second refining line 30b shown in the second stage from the top in FIG. 2, a shot blasting device for injecting and colliding processing fine particles against the surface of the slab 3 and a grindstone are mounted on a grinder or the like. A grinding device such as a grinder that partially grinds the surface of the slab 3 is provided in parallel, and either one or a combination of both is used to partially treat the surface defects.

In the third finishing line 30c shown in the third stage from the top in FIG. 2, a maintenance process for grinding the entire surface of the slab 3 is performed by a grinding device such as a grinder equipped with a grindstone.
In the fourth finishing line 30d shown in the lowermost stage in FIG. 2, a process for inspecting the surface of the slab 3 with a surface test apparatus to determine whether there are wrinkles or the like that cannot be sufficiently grasped by visual inspection or the like. . In the surface test treatment, for example, a test solution containing a predetermined solvent is poured on the surface of the slab 3 to stay in a thin film, and then a streak or a recessed portion having a predetermined depth is formed on the surface of the retained test solution. Can be performed by observing through an imaging device or the like.

For example, the four finishing lines 30a to 30d may be configured such that all the four finishing lines 30a to 30d are provided together in one building, or a part or all of the four finishing lines 30a to 30d are provided. It may be provided in a separate building. Note that the four finishing lines 30a to 30d shown in FIG. 2 are merely examples, and the actual number of finishing lines and the specific contents of the finishing processing performed in each finishing line have been described. It is not limited to this, and can be changed as appropriate.
Each of the four finishing lines 30a to 30d is provided with an operator, and the operator operates the working time from the work start date and time to the work end date and time of the work cycle to which he belongs, and the equipment of the finishing line in charge. Manage. The work cycle includes, for example, a first work cycle (7:00 am to 3:00 pm, work time: 8 hours), a second work cycle (3 pm to 10 pm, work time: 7 hours) ), As in the third work cycle (10 pm-7 am, work time: 9 hours), it is set to divide 24 hours a day into 3 work cycles that are continuous over time Yes.

The three work cycles are periodically switched from first to second, second to third, and third to first again. In the four finishing lines 30a to 30d, the operator changes according to switching of the three work cycles. That is, one work cycle is a unit of the minimum continuous work time of the operator.
A transport facility 130 for transporting the slab 3 is provided between the four finishing lines 30 a to 30 d and the hot rolling facility 40. In FIG. 2, the transport facility 130 is exemplified by one transport carriage provided on the exit side of the four finishing lines 30 a to 30 d, but each of the four finishing lines 30 a to 30 d has a slab. Three transfer facilities may be provided separately.
In the hot rolling facility 40, the hot slab 3 is subjected to a hot rolling process on the set scheduled date and time for the hot slab 3 respectively. After the hot rolling process, the slab 3 is appropriately subjected to subsequent processes such as a pickling process and a cold rolling process, and finally the dimensions such as thickness, width and length corresponding to the order, and for the welded structure It is finished to a product that satisfies the standards such as for machine structure and the shape such as thick plate and coil.

Next, the arithmetic device 10 provided in the refined plan creation device 1 will be described more specifically. As illustrated in FIG. 3, the arithmetic device 10 includes a population creation unit 101 that creates a population of the slab 3 that is a target of a refinement plan created for a certain work cycle. The population creation unit 101 creates a population for each refined line using data of a plurality of slabs 3 stored in the data storage device 51. The slab 3 included in the population is input with the processing time required for the refining process.
The nine slabs Pa1 to Pa6 and Pb1 to Pb3 illustrated in FIG. 4 are included in the population used in the process of creating the finishing plan of the third finishing line 30c. The nine slabs Pa1 to Pa6 and Pb1 to Pb3 are all slabs 3 that have been assigned to the order, and are scheduled to be subjected to a full grinding (full surface GR) process.

The nine slabs Pa1 to Pa6 and Pb1 to Pb3 are respectively registered with information on the slab ID, dimensions, standards, processing time, delivery position, and scheduled hot press date / time. These pieces of information are registered information as of May 30, 2015 at 5:00 am indicated by the current date “201550530/5: 00” on the upper right in FIG.
The nine slabs Pa1 to Pa6, Pb1 to Pb3 have the same thickness (200 mm) and width (1000 mm), and the length is shown to be different between 6000 mm and 12000 mm. The dimensions of the slab 3 may vary in thickness, width, and length depending on the specifications of the order. Further, the processing times of the nine slabs Pa1 to Pa6 and Pb1 to Pb3 shown in FIG. 4 are the times required for the entire surface grinding processing, and the slab ID of “XXXX1” shown at the top in FIG. In the case of a slab Pa1 having a thickness of about 90 minutes.

Further, the delivery position of the nine slabs Pa1 to Pa6, Pb1 to Pb3 to the third finishing line 30c is, for example, the continuous casting stock yard 60a in the case of the slab Pa1 shown in the uppermost stage in FIG. Further, in the case of the slab Pa2 shown in the second stage from the top in FIG. 4, the delivery position is the temporary storage yard 60b, and in the case of the slab Pa3 shown in the third stage from the top in FIG. Stock yard 60c. Further, in the case of the slab Pb3 shown in the lowermost stage in FIG.
As shown in FIG. 3, the arithmetic unit 10 has an earliest charging date and time (hereinafter referred to as “Early Start Timed”), which allows the slab 3 to be charged earliest from the delivery position of the slab 3 to the finishing line when the finishing plan is created. It is also referred to as “EST”.

The value of the EST is such that the slab 3 in which the EST is set has arrived at the finishing yard of the finishing line where the processing is performed, that is, precision slab or full grinding that is planned for the slab 3 is performed. It means the date and time (date and time) when the adjustment process can be started. The EST has an absolute restriction that it cannot be assigned to the work cycle unless the date and time of the EST arrives in the refinement plan creation process, and the time spent for the cooling process of the slab 3 and the delivery position in the steelworks at the time of the EST setting It is determined in consideration of the time required for movement to and from the finishing line. In particular,
EST = “Starting date and time” + “Cooling time” + “Transport time” + “Auxiliary time” (1)
It is represented by

As the “starting date and time” of the EST, when the slab 3 is sent out from any stock yard in the steelworks, the current date and time at the time of preparing the finishing plan can be adopted. On the other hand, when the slab 3 is sent out from the continuous casting facility 20, the cooling start date and time of the slab 3 can be adopted as the “starting date and time”.
“Cooling time” is a time having a certain width, and is added to “starting date and time” when the temperature of the slab 3 is lowered by the cooling process before the refining process, and the EST value is shifted behind the “starting date and time”. . On the other hand, in the case of the slab 3 that has been cooled at the time of preparation of the refinement plan, the value of “cooling time” can be zero.

The EST “transport time” has a certain time width, similar to the “cooling time”, from the delivery position in the steelworks at the time of EST setting to the finishing yard of the finishing line where the scheduled finishing processing is performed. This is the estimated time that will be spent moving. For example, when the slab 3 is moved from the heat treatment facility to the finishing line using two transport trolleys as the transport facility 120, the value of “transport time” is the processing capacity (travel time) of each transport trolley. It can be expressed as a sum.
Since the processing capacity of the transfer facility 120 changes with the operation of the steel factory, such as failure or stoppage for periodic inspection, the “transfer time” can be set flexibly. For example, even if the “transportation time” is 20 minutes when two transport carts are provided as transport equipment from a certain stockyard to the finishing line, When one unit is under inspection and the remaining one unit is transporting the slab 3, the “conveying time” can be changed to increase to 30 minutes or 40 minutes.

The “accompanying time” of the EST has a certain time width like the “cooling time” and the “conveyance time”, and before the slab 3 is subjected to the refining process, other than the “cooling time” and the “conveyance time”. Is the expected time (buffer) spent in “Attached time” includes, for example, the time required to transfer the slab 3 between a plurality of transport carriages, the time required to change the arrangement of the slab 3 in the stock yard, and the like.
Since the number of all slabs stored in the stockyard changes over time according to the operation of the steelworks, the “incident time” can be set flexibly. For example, if the number of all slabs stored in the off-site stock yard 60c is 100 at a certain point and the “accompanying time” is 30 minutes, it will increase to 150 at the time of preparation of the refining plan. Even in the same slab 3, the “accompanying time” can be changed to increase to 40 minutes or 50 minutes.

  FIG. 5 shows an example of data in a state where ESTs are calculated and registered in the slabs 3 included in the population according to the respective delivery positions. In the case of the slab Pa1 shown in the uppermost row in FIG. 5, the delivery position is the continuous casting stock yard 60a, and the columns of the cooling start date and time, the cooling time, and the cooling status are blank. The EST of the uppermost slab Pa1 is the date and time when the transport time “20 minutes” and the accompanying time “25 minutes” have elapsed from the current date and time “May 30, 2015, 5:00 am” as the starting date and time. It is indicated as “201550530/5: 45” in FIG. 5 that it is “5:45 am on May 30, 2015”. That is, the uppermost slab Pa1 is stored in the finishing yard of the third finishing line 30c at "5:45 am on May 30, 2015" and is loaded into the third finishing line 30c. Can be processed.

Further, for example, in the case of the slab Pa4 shown in the fourth stage from the top in FIG. 5, the delivery position is the continuous casting equipment 20, and the cooling start date and time is “9:25 pm on May 29, 2015” The cooling time is 9 hours. Therefore, at the time of the current date and time “May 30, 2015, 5:00 am”, the cooling state is “Cooling”.
The EST of this slab Pa4 has a cooling time “9 hours”, a conveyance time “20 minutes” and an incident time “40 minutes” from the starting date and time “May 29, 2015 9:25 pm”. If it is “7:25 am on May 30, 2015” which is the date and time that has passed, it can be loaded into the third refining line 30c at any time after “7:25 am on May 30, 2015” It is.

  The values of “cooling time”, “transport time”, and “incident time” of EST can be determined by empirical rules and are stored in the data storage device 51 via the input device 52. It should be noted that the “starting date and time” of the EST can be adopted even at a time other than the cooling start date and time. For example, you may use the scheduled date and time (scheduled cutting date and time) when the slab 3 is cut out from a slab cast by a continuous casting machine. When adopting the scheduled cutting date and time as the “starting date and time”, the “transport time” and “accompanying time” of the EST may be set so as to further include the time spent moving between the cutting position and the heat treatment equipment. .

As shown in FIG. 3, the arithmetic unit 10 also includes the latest start date and time (Latest Started) for inserting the slab 3 into the finishing line so that the scheduled heat and pressure date and time of the slab 3 at the time of preparation of the finishing plan can be achieved. The latest loading date and time calculation unit 103 that calculates Time (hereinafter also referred to as “LST”) is included. The value of LST means the start deadline date and time at which the refining process needs to be started at the latest in order for the slab 3 in which the LST is set to meet the scheduled hot press date and time in the subsequent hot rolling process. .
That is, the LST is set retrospectively from the scheduled hot press date and time in consideration of the processing time spent for the finishing process of the slab 3 and the time required for the movement between the finishing line and the hot rolling equipment 40. In particular,
LST = “Starting Date / Time” − “Processing Time” − “Transport Time” − “Attached Time” (2)
Can be expressed as

The “processing time” of the LST is a time having a certain width, and is set and set according to conditions such as the size of the slab 3, the standard, the content of the finishing process to be performed, the processing capacity of the finishing line, etc. The value is stored in the data storage device 51 via the input device 52. A processing time table (not shown) for storing the processing time is created in advance and stored in the data storage device 51. When the population creation unit 101 creates the population of each slab 3, the data The processing time can be automatically set with reference to the storage device 51.
The “conveying time” of the LST has a certain time width like the “processing time”, and the slab 3 from the exit side of the finishing line of the processed slab 3 to the entrance side of the hot rolling equipment 40. Is the estimated time spent traveling until The value of “transport time” can be expressed by the sum of the processing capacities of the respective apparatuses constituting the transport equipment 130 provided, similarly to the “transport time” of EST. The “accompanying time” of the LST has a certain time width like the “processing time”, and before the slab 3 arrives at the hot rolling facility 40 side, other than “processing time” and “conveying time” Expected time spent (buffer).

  FIG. 6 shows an example of data in a state where the LST is calculated and registered in the slab 3 included in the population according to each scheduled date and time for heat pressure. The LST of the slab Pa1 shown in the uppermost row in FIG. 6 starts from the scheduled heat pressure date and time “May 30, 2015, 14:00 pm”, which is the starting date and time, processing time “90 minutes”, and conveyance time “30 minutes”. "And 15/30: 11: 45" indicating that it is "11:45 am on May 30, 2015", which is the date and time of "135 minutes" that is the sum of the incident time "15 minutes" Yes. That is, the uppermost slab Pa1 is grounded as if it was inserted into the third finishing line 30c at the latest "11:45 am on May 30, 2015" in order to be in time for the scheduled hot press time. Processing must be completed.

In addition, the LST of the slab Pa4 shown in the fourth row from the top in FIG. 6 is the processing time “60 minutes” and the conveyance time “30 minutes” from the scheduled hot press date “May 30, 2015 0:30 pm”. ”And the accompanying time“ 15 minutes ”,“ 105 minutes ”, which is the date and time of the sum of“ 105 minutes ”, is“ 10:45 am on May 30, 2015 ”. As in the case of the uppermost slab Pa1, this slab Pa4 needs to be loaded into the third finishing line 30c at the latest "10:45 am on May 30, 2015".
The values of “processing time”, “carrying time”, and “accompanying time” of LST can be determined by empirical rules as in the case of EST, and are stored in the data storage device 51 via the input device 52. Note that the LST may be calculated in consideration of the process of the slab 3 other than the movement performed immediately after the refining process, such as the heat process previously performed for the hot rolling process. At this time, as the “starting date and time” of the LST, for example, the scheduled date and time of charging to the heating furnace is used, and the “conveying time” and “incident time” of the LST are used for the movement between the finishing line and the heating furnace What is necessary is just to set using the time spent with it.

  As shown in FIG. 3, the arithmetic unit 10 is configured so that the date and time when the processing time required for each refining process of the slab 3 from the EST has arrived within the work time of the work cycle for performing the refining process. Is allocated as a slab to be allocated from a population. Specifically, the allocation target slab extraction unit 104 first sets, as the allocation target slab, the slab 3 in which each EST of the slab 3 included in the population is earlier than the work start date and time of the work cycle for creating the refinement plan. Selective extraction (first extraction).

Next, even if each EST is a slab 3 having a value after the work start date and time of the work cycle, the allocation target slab extraction unit 104 uses the date and time when each processing time has elapsed from the EST as the work end date and time. The slab 3 that arrives until then is selectively extracted as the allocation target slab (second extraction). That is, the allocation target slab extraction unit 104 selects the slab 3 from the population through a two-stage process.
In FIG. 7, the nine slabs included in the population are prepared when the refining plan for the first work cycle (from 7:00 am to 3:00 pm) on May 30, 2015 is created. An area surrounded by double lines in which six slabs Pa1 to Pa6 having slab IDs from “XXXX1” to “XXXX6” are extracted as allocation target slabs from Pa1 to Pa6, Pb1 to Pb3 It is illustrated by.
The six extracted slabs Pa1 to Pa6 are arranged from the top in the order in which the ESTs arrive early (ascending order). On the other hand, the order of arrangement and the ascending order of LST are not related. As shown in the column of “EST + processing time”, the six slabs Pa1 to Pa6 are all slabs in which the date and time when each processing time has elapsed from the EST comes within the working time of the first work cycle. 3.

  On the other hand, the slab Pa7 having the slab ID “XXXX7” shown in the seventh row from the top in FIG. 7 is “date and time when the processing time“ 120 minutes ”has elapsed from the EST“ May 30, 2015, 3: 5 pm Since “minute” exceeds the work end date and time of the first work cycle “May 30, 2015, 3:00 pm”, it is not extracted as the first allocation target slab. Further, the two slabs Pa8 and Pa9 shown below the slab Pa7 also have a value in the column of “EST + processing time” exceeding the work end date and time of the first work cycle, as in the case of the slab Pa7. It is not extracted as the allocation target slab.

  In FIG. 8, the temporal positional relationship of the six extracted slabs Pa1 to Pa6 shown in FIG. 7 indicates that six horizontal rectangles are included in the scale including the work time of the first work cycle. Each is illustrated with an open white bar. Each of the white bars is drawn such that the position of the left end with the letter “E” indicates EST and the position of the right end with the letter “L” indicates LST. . The six white bars are arranged at intervals from the top to the bottom. The six white bars in FIG. 8 indicate that the position of the left end of each of the six slabs Pa1 to Pa6 is arranged in ascending order of the EST and that the position of each left end is the rear side over time. It arrange | positions so that it may shift sequentially toward the right side.

In addition, inside the six white bars, horizontally long and rectangular bars included in the white bars, which are slightly smaller in size than the white bars, are arranged with diagonal lines. . The length in the left-right direction of the shaded bar is drawn so as to indicate the length of the processing time of the refining process of each slab 3. The left end portion of the white bar and the left end portion of the shaded bar are arranged so as to overlap each other, and indicate a state in which the scheduled processing start date and time and the EST of the refining processing of each slab 3 are the same value.
Even if the EST is earlier than the work start date and time, for example, the slab placed in a place where the transport time and incidental time fluctuate greatly depending on the environment, or the adjustment is expected to be completed even if the adjustment is performed. Due to special factors to which the slab belongs, such as a thin slab, there is a EST with extremely low credibility. The slab belonging to such a special factor is not automatically assigned to the work cycle by using the refinement plan creation device 1, but is manually assigned to the work cycle, for example, and the time zone in which this special slab is assigned. What is necessary is just to comprise so that a refined plan may be produced using the refined plan preparation apparatus 1 with respect to time zones other than.

  Further, as illustrated in FIG. 3, the arithmetic device 10 includes a processing order assigning unit 105 that assigns orders to the allocation target slabs in the order of arrival of each LST (ascending order). Specifically, the processing order assigning unit 105 includes all the slabs 3 included in the allocation target slabs, as exemplified by the six slabs Pa1 to Pa6 whose vertical alignment positions are changed in FIG. Rearrange in ascending order of LST. The six slabs Pa1 to Pa6 are arranged from top to bottom in the order of Pa3, Pa2, Pa4, Pa1, Pa6, and Pa5. The processing order assigning unit 105 corresponds to the order of Pa3, Pa2, Pa4, Pa1, Pa6, Pa5 for six slabs Pa1 to Pa6, such as No. 1 for slab Pa3, No. 2 for slab Pa2, and so on. The order of No. 1 to No. 6 is given respectively.

Of the six slabs Pa1 to Pa6 shown in FIG. 9, the slab 3 in which the LST arrives earliest is the slab Pa3 having a slab ID of “XXXX3” (LST: May 30, 2015, 7:50 am) The slab 3 in which the LST arrives the latest is the slab Pa5 (LST: May 30, 2015 2:05 pm) having a slab ID of “XXXX5”.
Further, in FIG. 10, the positional relationship of the six slabs Pa1 to Pa6 after rearrangement shown in FIG. 9 with time is provided with six white bars and diagonal lines as in FIG. Each of which is illustrated with a bar. In the six white bars, the six slabs Pa1 to Pa6 are arranged in ascending order of LST so that the position of each right end portion is sequentially shifted toward the right side in FIG. Is arranged.

  As illustrated in FIG. 3, the arithmetic device 10 includes a processing date and time assigning unit 106 that assigns a processing end scheduled date and time of the refining process to the allocation target slab according to the assigned order and each processing time. Specifically, for example, as shown in FIG. 11, the processing date and time assigning unit 106 maintains the order given to each of the six slabs Pa1 to Pa6, while the first slab Pa3 has the entire surface. As the scheduled processing start date and time of grinding, the same value as the work start date and time “May 30, 2015, 7:00 am” of the first work cycle is given. Then, the processing date and time giving unit 106 adds the processing time “75 minutes” of the slab Pa3 to the scheduled processing start date and time “May 30, 2015 at 7:00 am” of the slab Pa3 “May 30, 2015. “8:15 am” is calculated as the scheduled end date of the entire grinding process of the slab Pa3, and is given to the first slab Pa3.

Next, the processing date and time giving unit 106 calculates the scheduled processing start date and time of the second slab Pa2. At this time, for example, the third finishing line 30c is configured to insert and grind the slabs 3 one by one into the line so that the subsequent slabs 3 cannot be inserted into the line until the grinding of the preceding slab 3 is completed. If there is, the processing date and time giving unit 106 gives the scheduled processing start date and time of the second slab Pa2 and the scheduled processing end date and time of "No. 1 slab Pa3" on May 30, 2015 at 8:15 am. . Then, the processing date and time giving unit 106 adds the processing time “75 minutes” to the scheduled processing start date and time “May 30, 2015, 8:15 am” of slab Pa2, “May 30, 2015 am “9:30” is calculated as the scheduled date and time for finishing the entire grinding process and is given to the second slab Pa2.
In addition, when the slabs 3 are loaded one by one in the third finishing line 30c, if it is necessary to leave a certain interval (idle time) separately from the processing time, for example, the processing of the preceding slab 3 ends. The date and time when the necessary idle time has elapsed from the scheduled date and time may be set as the scheduled processing start date and time of the subsequent slab 3. Alternatively, the “processing time” of the preceding slab 3 may be set so as to include not only the time required for the finishing process but also the necessary idle time.

Subsequently, as the scheduled processing start date and time of the third slab Pa4, the processing date and time assigning unit 106 assigns the value of the scheduled processing end date and time “May 30, 2015 9:30 am” of the second slab Pa2. To do. Then, the processing date and time giving unit 106 adds the processing time “60 minutes” to the scheduled processing start date and time “9:30 am on May 30, 2015” of the third slab Pa4 “May 2015”. “30:30 am on the 30th” is calculated as the scheduled date and time for finishing the entire grinding process and is given to the third slab Pa4.
Subsequently, as the scheduled processing start date and time of the fourth slab Pa1, the processing date and time assigning unit 106 sets the value of the scheduled processing end date and time “10:30 am on May 30, 2015” of the third slab Pa4. The process of adding the processing time “90 minutes” of the slab Pa1 to the sixth slab Pa5 is sequentially repeated, and as shown in FIG. 11, the scheduled start date and time of processing of the six slabs Pa1 to Pa6, as shown in FIG. Calculate and assign all scheduled end dates and times.

  In FIG. 12, the vertical positional relationship of the six hollow bars respectively indicating the six slabs Pa1 to Pa6 is drawn in the same manner as the positional relationship shown in FIG. It is shown that the order from No. 6 to No. 6 is maintained. In FIG. 12, the six diagonally shaded bars match the right end of the upper diagonally-lined bar with the left end of the lower diagonally-lined bar. In this way, as it goes from the upper side to the lower side, it shifts toward the right side in FIG. The coincidence point between the right end of the upper hatched bar and the left end of the lower hatched bar is the same as the processing end scheduled date and time of the slab 3 indicated by the upper bar. This indicates that the scheduled processing start date and time of the slab 3 indicated by the bar is set.

As shown in FIG. 3, the arithmetic unit 10 extracts the slab 3 whose processing end scheduled date and time comes within the work time of the work cycle from the assignment target slab as the assignment slab, and each of the extracted assignment slabs is given. And a refining plan creation unit 107 that creates a refining plan for a work cycle.
For example, as shown in FIG. 12, among the six slabs Pa1 to Pa6, the processing end scheduled date and time of the five slabs Pa1 to Pa4 and Pa6 excluding the lowest slab Pa5 is the first work cycle. Arrives within working hours. On the other hand, the scheduled processing end date and time of the lowermost slab Pa5 in FIG. 12 is “3:15 pm on May 30, 2015”, and the work ending date and time of the first work cycle “pm on May 30, 2015 3:00 "is exceeded.

Therefore, the refining plan creation unit 107 determines that the slab Pa5 of the order No. 6 cannot finish the entire grinding process within the working time, and the five slabs Pa1 to Pa4 and Pa6 excluding this slab Pa5 are determined. As shown in the area surrounded by the double line in FIG. The data of the scheduled processing start date and time and the scheduled processing end date and time of the extracted allocation slab are stored in the data storage device 51 as the refinement plan of the corresponding first work cycle together with the processing order.
As shown in FIG. 3, the arithmetic unit 10 determines that the slab 3 that is not allocated to the preceding work cycle (hereinafter referred to as “non-assigned slab”) among the allocation target slabs is adjusted for the subsequent work cycle. A non-allocated slab initialization unit 108 that initializes registration information of non-allocated slabs is included so as to be included in the population created in the process of creating a plan. Specifically, for example, the EST slab Pa5 in the order 6 shown in FIG. 13 is released from the state of the allocation target slab of the first work cycle, and is calculated in the refining plan of the first work cycle. The data state is initialized so that various form data such as LST, scheduled process start date and time, scheduled process end date and time are blank.

  In FIG. 14, after the non-allocated slab initialization unit 108 executes the non-allocated slab initialization process, a population different from the population shown in FIG. An example is illustrated. The seven slabs Pa5, Pb1 to Pb6 shown in FIG. 14 create an adjustment plan for the third adjustment line 30c in the same manner as the nine slabs Pa1 to Pa6 and Pb1 to Pb3 shown in FIG. All are slabs 3 included in the population used in the process and allotted to orders. In addition, the latest date as of 5:30 am on May 30, 2015, about 30 minutes after the execution date and time of “priority refining plan creation processing shown in FIG. 4” on May 30, 2015 at 5:00 am Is registered.

Of the seven slabs Pa5, Pb1 to Pb6 shown in FIG. 14, the four slabs Pa5, Pb1 to Pb3 from the uppermost slab Pa5 to the central slab Pb3 are the nine shown in FIG. The slab 3 included in the slabs Pa1 to Pa6 and Pb1 to Pb3. As in the uppermost slab Pa5, the non-assigned slab that has not been assigned to the refinement plan of the preceding first work cycle is subjected to initialization processing, so that the non-assigned slab is refined in the subsequent work cycle. It can be included in the population when creating a plan.
Further, the values of the processing time, the delivery position, and the scheduled heat pressure date and time of the four slabs Pa5, Pb1 to Pb3 in FIG. 14 are exemplified as the values shown in FIG. The schedule of the scheduled slab casting date and the scheduled date and time of hot pressing change from time to time with the operation, and are appropriately stored in the corresponding database. Therefore, each time a refining plan is repeatedly created at intervals, the processing time of the slab 3 included in the population, the delivery position, and the scheduled heat pressure date and time can be updated to the latest information. In addition, since the number of slabs 3 used for setting the “transport time” and “incident time” of each EST and LST also changes in the same way as the processing time, etc., the latest each time a refinement plan is created. It is possible to update the information.

The refined plan database 11 stores the created refined plan. As shown in FIG. 1, operator terminals 32 a to 32 d of four finishing lines 30 a to 30 d are connected to the finishing plan database 11, respectively, and are created via the four terminals 32 a to 32 d. The refined plan is disclosed to the operator. The four terminals 32a to 32d correspond to “output devices”.
Further, for example, when an operator who visually observes the actual surface of the slab 3 conveyed to the finishing yard determines that it is impossible or inappropriate to perform the planned finishing treatment on the slab 3, The operator can also transmit the determination to the arithmetic device 10 side via the terminals 32a to 32d. In addition, the fact that the trimming process has actually been performed in the four trimming lines 30a to 30d is input as data to be added to the data of each slab 3 via the four terminals 32a to 32d. Is possible.

The prepared finishing plan is stored in the basic database of the steel mill, and the terminal 42 for the operator of the hot rolling facility 40 and the terminal 22 for the operator of the continuous casting facility 20 can access the basic database, respectively. If it comprises, the finishing plan can be shared also in the continuous casting equipment 20 and the hot rolling equipment 40.
Each apparatus such as the arithmetic unit 10 and the database included in the refinement plan creation apparatus 1 can be configured by a general computer including a CPU, a RAM, a ROM, an HDD, and the like. Further, the refinement plan creation device 1 is provided by connecting a display device (not shown) to the arithmetic device 10, and the arithmetic device 10 displays the scheduled heat pressure date, the cooling start date, EST, LST, the refinement plan, etc., respectively. You may comprise so that it may read from a corresponding database and may display on a display apparatus.

−Preparation plan creation process−
Next, the refinement plan creation process using the refinement plan creation device 1 according to the embodiment of the present invention will be described. In the refinement plan creation process described below, a refinement plan has been created from May 29, 2015 at 10:00 pm to the third work cycle on May 30, 2015 at 7:00 am And preparing a refining plan for the slab 3 after the first work cycle (7:00 am to 3:00 pm on May 30, 2015) following this third work cycle. To do.

First, in step S1 of FIG. 15, the population creation unit 101 of the computing device 10 registers the contents of the newly registered steel product order registered in the casting plan database 21 and the hot-pressure plan database 41, or existing ones. The latest slab 3 data reflecting information such as correction / deletion of the contents of the order is read. At the time of reading, a list of the latest data of the unallocated slab 3 that is not included in the refinement plan of any work cycle is created and stored in the data storage device 51.
Next, the population creation unit 101 extracts data in which the scheduled date and time of heat pressure are registered from the slabs 3 included in the created data list. Then, the population creation unit 101 distributes the extracted data of the slab 3 for each of the four finishing lines 30a to 30d according to the type of the finishing process applied to the slab 3, as shown in FIG. A population (first population) is prepared.

Next, in step S2, the earliest charging date calculation unit 102 calculates ESTs for all slabs 3 included in the first population for each refinement line, and calculates as shown in FIG. The registered EST is registered in each slab 3.
Next, in step S3, the latest charging date calculation unit 103 calculates LST for all slabs 3 included in the first population for each refinement line, as shown in FIG. The calculated LST is registered in each slab 3.
Next, in step S4, the allocation target slab extraction unit 104 selects the slabs 3 that can be allocated to the first work cycle from the first population of the first work cycle as shown in FIGS. , Extracted as the first allocation target slab.

Next, in step S5, the processing order assigning unit 105 assigns the processing order to all the slabs 3 included in the first assignment target slab, as shown in FIGS. 9 and 10, in ascending order of LST.
Next, in step S6, the processing date and time assigning unit 106 considers the processing time of each slab 3 while maintaining the processing order between the first allocation target slabs, and sets the processing start scheduled date and time and processing of the refining processing. The scheduled end date and time are calculated and assigned to the first allocation target slab as shown in FIGS.

Next, in step S7, the refinement plan creation unit 107 sets the process end scheduled date / time among the first allocation target slabs in which the process start scheduled date / time and the process end scheduled date / time are set to the work end of the first work cycle. As shown in FIG. 13, slabs 3 that arrive before the date and time are selectively extracted as slabs 3 to be assigned to the first work cycle.
Next, in step S8, the unallocated slab initialization unit 108 initializes an unallocated slab that has not been allocated to the first work cycle.
Next, in step S9, the refinement plan creation process is continued, and the refinement plan of the second work cycle (May 30, 2015 from 3:00 pm to 10:00 pm) following the first work cycle. 15, as shown in FIG. 15, the arithmetic unit 10 returns to step S <b> 1 and rereads the latest slab 3 information registered in the casting plan database 21 and the hot-pressure plan database 41. Then, the contents of the newly added order and the contents of changes such as correction / deletion of the contents of the existing order are reflected in the data list of the slab 3 stored in the data storage device 51, as shown in FIG. The second population updated to the latest state is prepared.

  Next, the finishing plan creation device 1 proceeds to step S2, and similarly to the case of the first work cycle, executes the processes up to step S3, step S4,. Create a cycle refinement plan. In FIG. 16, in step S <b> 4 in the refinement plan creation process of the second work cycle, the bottom tier in FIG. 16 is selected from the seven slabs Pa <b> 5, Pb <b> 1 to Pb <b> 6 included in the second population. A state in which the six slabs Pa5, Pb1 to Pb5 excluding the slab Pb6 are extracted as the second allocation target slabs is illustrated in an area surrounded by a double line. In the removed slab Pb6, the value of “EST + processing time” (10:30 pm on May 30, 2015) is the work end date and time of the second work cycle (10:00 pm on May 30, 2015) ).

  Also, in FIG. 17, white bars and hatched bars corresponding to the seven slabs Pa5, Pb1 to Pb6 shown in FIG. 16 are shown, respectively. A state that does not end within the work time of the second work cycle is shown. As described above, the finishing plan creation process for the subsequent work cycle is executed by a so-called hill-climbing method that targets a non-allocated slab generated in the finishing plan for the preceding work cycle. When creating a finishing plan for the third work cycle following the second work cycle, the finishing plan creation device 1 returns to step S1 again in step S9, as in the case of the second work cycle. Then, a series of processes up to step S9 is executed.

For successive work cycles, the refinement plan creation process is sequentially executed while the unassigned slabs are included in the population of the subsequent work cycles, and a plurality of created refinement plans are accumulated. A refined plan will be created. When the refined plan is created for all desired work cycles, the refined plan creating apparatus 1 proceeds to step S10 in step S9 without returning to step S1, and refines the created refined plan. Store in the plan database 11. And the refinement plan creation apparatus 1 outputs the refinement plan produced with respect to each terminal 32a-32d of the four refinement lines 30a-30d, and the refinement plan creation which concerns on embodiment of this invention The process ends.
Thereafter, when the work start date and time of each work cycle arrives, the operators assigned to the four finishing lines 30a to 30d refer to the finishing plans via the terminals 32a to 32d, respectively. Then, the processing order of the slabs 3 is confirmed, and the slabs 3 stored in the finishing yard are sequentially inserted into the finishing lines 30a to 30d from the first slab 3 and the respective finishing processes are started. .

  According to the refinement plan creation device 1 according to the embodiment of the present invention, the EST and LST of the slab 3 at the time of creation of the refinement plan are calculated, and the target of the refinement plan is calculated in consideration of the calculated EST and LST. The slab 3 to be finally included in the finishing plan is determined from the population of the plurality of slabs 3 together with the order of the finishing processing. In other words, the refinement plan creation apparatus 1 according to the embodiment of the present invention creates a refinement plan using a uniform standard derived from the relationship between the work cycle schedule and the ESTs and LSTs of the slab 3. Therefore, even for an extremely large number of slabs 3 such as 2000 sheets or 3000 sheets, it is possible to create a refining plan with an appropriate order easily and quickly while suppressing labor.

  In addition, the finishing plan creation device 1 according to the embodiment of the present invention can easily and quickly create a finishing plan with reduced labor, and after creating the plan, the unscheduled slab 3 suddenly enters the finishing line. Even if there is not enough time, such as interrupts and refining a new refinement plan in a short time before the start time of the work cycle, it is possible to create an error in the appropriate order with less errors. Therefore, it is possible to smoothly operate the refining process at the site of the refining line. According to the embodiment of the present invention, the number of slabs 3 to be subjected to the refining process increases as the quality required for steel products increases year by year and the processing amount per sheet also increases. The refinement plan creation apparatus 1 is particularly effective.

Further, according to the refinement plan creating apparatus 1 according to the embodiment of the present invention, it is possible to create a refinement plan for a long period of time such as one week or longer, not a short plan of about one day. For this reason, it is not necessary to frequently repeat the creation of a short-term plan at the site of the finishing lines 30a to 30d.
Further, according to the refinement plan creating apparatus 1 according to the embodiment of the present invention, the EST and LST of the non-allocated slab other than the slab 3 allocated to the preceding work cycle are initialized, and the refinement in the subsequent work cycle is performed. Include in the planning population. Therefore, even if a refinement plan is created continuously, it can be executed efficiently.

Further, according to the refinement plan creating apparatus 1 according to the embodiment of the present invention, each time a refinement plan for a subsequent work cycle is created, the population is updated, and the “conveying time” and “accompanying” of each slab 3 are updated. The value of a parameter such as “time” is changed. For this reason, the latest data on the steelworks is reflected in the registered data of the population every time it is updated, so it is possible to create a refined plan that is more effective each time it is created. .
Moreover, according to the refinement plan creation apparatus 1 which concerns on embodiment of this invention, the refinement plan stored in the refinement plan database 11 is each of the refinement lines 30a-30d via the terminals 32a-32d. It can be quickly and easily communicated to the operator. In addition, exchange can be easily performed through the terminals 32a to 32d so as to adjust the order of the refining process that can be performed between the refining plan creation apparatus 1 side and the operator side. Moreover, the performance data of the finishing process is input through the terminals 32a to 32d, so that the slab 3 that has been subjected to the finishing process can be accurately grasped.

  In addition, the EST used in the finishing plan creation device 1 according to the embodiment of the present invention takes into consideration the delivery position of the slab 3 immediately before the finishing processing, such as the continuous casting equipment 20 and the slab stock yards 60a to 60c. Is calculated. The LST is calculated in consideration of the scheduled date and time for performing the process immediately after the finishing process such as the hot rolling process. Therefore, since the time required for processing and moving the slab 3 on both the upstream side and the downstream side of the finishing line is taken into consideration, a finishing plan that is consistent with continuous processing steps in the steel works is created. be able to. In particular, it is possible to set a processing order in accordance with a request for a scheduled heat pressure date and time of the lower process of the finishing process, and thus a delivery date requested by the customer.

  In the steelworks to which the refinement plan creating apparatus 1 according to the embodiment of the present invention is applied, even for the same steel product, the production lead time can be shortened, for example, by about 1.5 days compared to before application. . In addition, the stock amount of the slab 3 that needs to be refined in the steelworks can be reduced by about 2% (for example, about 500 tons if the total amount is about 20,000 to 25,000 tons). Further, the efficiency of feeding the slab 3 from the finishing lines 30a to 30d to the hot rolling equipment 40 is improved, so that the processing efficiency of the hot rolling equipment 40 is also improved, and the processing amount is about 0.4% compared to before application. (For example, if the processing amount per month is about 350,000 to 400,000 tons, it is about 1400 tons).

(First modification)
In the above-described refining plan creation process according to the embodiment of the present invention, the LST is set retrospectively so as to achieve the scheduled hot press date and time, and the refining of each slab 3 is performed in consideration of this LST. In the present invention, it is possible to set the scheduled processing start date and time to be a date and time that comes after each LST. That is, in the first modified example, unlike the EST, the LST is not an absolute constraint, but is a temporary parameter as an index for prioritizing the processing order, and the scheduled processing start date and time of the slab 3 is a date and time after the LST. Execute the refinement planning process so that it is allowed.
At this time, for example, the operation of the corresponding equipment is adjusted so as to shorten the “conveying time” and “incident time” of the LST related to the movement of the slab 3 between the finishing line and the hot rolling equipment 40. In this way, the overall lead time until shipment is maintained. Moreover, it is also possible to adjust on the downstream hot rolling equipment 40 side, such as shifting the scheduled hot press date and time backward. By allowing the scheduled processing start date and time to be later than the LST, it is possible to quickly calculate the scheduled processing start date and time of the slab 3 assigned to the subsequent work cycle.

(Second modification)
In addition, for example, it is determined that any of the four finishing lines 30a to 30d needs to be processed by the fourth finishing line 30d for performing the surface test process and the other three finishing lines 30b to 30d. When the generated slab 3 is generated, the slab 3 may be used again as a target for subsequent refinement plan creation processing. As the “start date and time” of the new EST of the slab 3, for example, “current date and time” is used, and as the “transport time” and “incident time” of the EST, the adjustment yard of the fourth adjustment line 30d, What is necessary is just to set using the time concerning the conveyance between the adjustment yards of the adjustment line which performs a required adjustment process.

(Other embodiments)
Although the present invention has been described by the embodiments disclosed above, it should not be understood that the descriptions and drawings constituting a part of this disclosure limit the present invention. From this disclosure, it should be understood that various alternative embodiments, examples, and operational techniques will become apparent to those skilled in the art. For example, in the embodiment of the present invention, the refinement plan creation apparatus 1 that is a computer system executes the refinement plan creation process. Instead of the refinement plan creation apparatus 1, the refinement plan creation apparatus 1 has contents equivalent to the refinement plan creation process. By performing the processing manually by an operator, a refined plan creation method can be configured.

In the refining plan creation device 1 according to the embodiment of the present invention, the cooling start date / time, the heat pressure scheduled date / time, and the refining plan are respectively stored in the casting plan database 21, the heat pressure plan database 41, and the refining plan database 11. Although they are configured to be stored separately, for example, all of them may be stored together in the data storage device 51 or the basic database. As long as the arithmetic device 10 can access the corresponding database, the refinement plan creation processing according to the present invention can be executed.
Moreover, a refinement plan creation program can be comprised by comprising the program which makes the arithmetic unit 10 perform each step of the refinement plan creation process which concerns on embodiment of this invention. In order to execute the refinement plan creation program, for example, the refinement plan creation program is stored in a main storage device (not shown) of the arithmetic unit 10 and the stored refinement plan creation program is appropriately read from the main storage device. Just execute.

  As described above, the present invention includes various embodiments and the like not described in the present specification and drawings, and the technical scope of the present invention is an invention according to the scope of claims reasonable from the above description. It is determined only by specific matters.

DESCRIPTION OF SYMBOLS 1 Refinement plan preparation apparatus 3 Slab 10 Arithmetic apparatus 11 Refinement plan database 20 Continuous casting equipment 21 Casting plan database 30a 1st refinement line 30b 2nd refinement line 30c 3rd refinement line 30d 4th refinement line 32a ~ 32d Terminal 40 Hot rolling equipment 41 Hot pressure plan database 51 Data storage device 52 Input device 60a Continuous casting stock yard 60b Temporary stock yard 60c Off-site stock yard 120, 130, 160a to 160c Conveying equipment

Claims (6)

An earliest charging date and time calculating unit that calculates the earliest charging date and time that can be charged the slab earliest into a refining line for refining the plurality of slabs from the delivery position of a plurality of slabs,
The latest charging date and time calculating unit for calculating the latest charging date and time for charging the slab into the finishing line so as to achieve the hot press scheduled date and time for performing the hot rolling process after the finishing process,
A slab in which the date and time when the processing time for each of the slabs of the slab has elapsed from the earliest charging date and time arrives within the work time of the work cycle for performing the rectification process is extracted as a slab to be allocated An allocation target slab extraction unit to perform,
A processing order assigning unit that assigns an order to the allocation target slabs in the order of the earliest date and time of the latest loading;
A processing date and time giving unit for assigning a processing end scheduled date and time of the refining process to the allocation target slab according to the order and the processing time of each.
A slab in which the scheduled processing end date and time arrives within the work time of the work cycle is extracted from the slab to be assigned as an assigned slab, and the assigned slab is created together with the order as a refined plan of the work cycle. The creation department;
A refinement plan creation apparatus comprising an arithmetic unit having   In the process of creating the refinement plan of the preceding work cycle of the two consecutive work cycles, the arithmetic device is a non-assigned slab that has not been assigned to the preceding work cycle of the assignment target slabs Further includes a non-allocated slab initialization unit that initializes registration information of the non-allocated slabs so that it is included in the population created in the process of creating the refinement plan of the subsequent work cycle. The refinement plan creation apparatus according to claim 1, wherein:   The earliest charging date and time is set in consideration of a time associated with movement of the slab between the finishing line and a hot rolling facility for performing the hot rolling process. The refinement plan creation apparatus according to 1 or 2.   The earliest charging date and time is set in consideration of a time associated with the movement of the slab between the delivery position of the slab and the finishing line. Refinement plan creation device described in 1. A step of calculating an earliest charging date and time at which the slab can be charged earliest in a refining line for refining the plurality of slabs from a delivery position of the plurality of slabs,
A step of causing the latest charging date and time calculating unit to calculate the latest charging date and time for charging the slab into the finishing line so as to achieve the scheduled hot press date and time for performing the hot rolling process after the finishing process. When,
The slab in which the date and time when the processing time for each of the slabs of the slab has elapsed from the earliest loading date and time is within the working time of the work cycle in which the slab processing is performed. Extracting as a slab to be allocated,
A step of causing the processing order assigning unit to assign an order to the allocation target slabs in order of the latest loading date and time;
A step of giving a processing date and time assigning unit a processing end scheduled date and time of the refining processing according to the order and each of the processing times to the allocation slab;
A slab whose scheduled process end date and time arrives within the work time of the work cycle is extracted from the slab to be assigned as an assigned slab, and the assigned slab is refined in the work cycle together with the order. A step to create as a plan,
A refined plan creation method characterized by including: A step of calculating an earliest charging date and time at which the slab can be charged earliest in a refining line for refining the plurality of slabs from a delivery position of the plurality of slabs,
A step of causing the latest charging date and time calculating unit to calculate the latest charging date and time for charging the slab into the finishing line so as to achieve the scheduled hot press date and time for performing the hot rolling process after the finishing process. When,
The slab in which the date and time when the processing time for each of the slabs of the slab has elapsed from the earliest loading date and time is within the working time of the work cycle in which the slab processing is performed. Extracting as a slab to be allocated,
A step of causing the processing order assigning unit to assign an order to the allocation target slabs in order of the latest loading date and time;
A step of giving a processing date and time assigning unit a processing end scheduled date and time of the refining processing according to the order and each of the processing times to the allocation slab;
A slab whose scheduled process end date and time arrives within the work time of the work cycle is extracted from the slab to be assigned as an assigned slab, and the assigned slab is refined in the work cycle together with the order. A step to create as a plan,
An elaboration plan creation program that causes a computing device of a computer to execute a process including:

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