JPH10214104A - Slab design method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make the unit weight of product large, and to reduce the excess parts even in the case in which various kinds of orders are supplied by allocating a pertinent magnified slab to the order in the case in which no excess is present and successively allocating the order to one kind of the magnified slab of the largest width and length in the case in which the excess is present. SOLUTION: An order continuity judgment part 20, a repeat order slab magnification processing part 30 for performing the magnification processing of the order of the slab with the continuity of the order and a repeat order slab combination processing part 40, etc., are provided. Then, other than a standard slab, one or more kinds of the magnified slabs for which it is magnified are prepared. Then, in the case of judging that the order continuously ordered in the same manufacture specifications is present, the standard slab and one or more kinds of the magnified slabs magnified by considering the ability of a manufacture equipment are estimated and one of the magnified slab is allocated to the order. In this case, the pertinent magnified slab is allocated in the case that no excess is present and one kind of the magnified slab of the largest width and length is successively allocated in the case that the excess is present.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technology for minimizing excess slab when designing a slab material for an order upon manufacturing a thin plate such as a coil in the steel industry. In particular, the present invention relates to a technique for efficiently designing a slab in consideration of a repeated order.

[0002]

2. Description of the Related Art Conventionally, thin coil products are manufactured as a product through a steelmaking (converter) process, a continuous casting process, a hot rolling process, a cooling process, an annealing process (hereinafter simply referred to as annealing), and various surface treatment processes. When manufacturing this thin-plate coil product, the capacity of equipment such as batch annealing, which is the bottleneck of equipment capacity during the manufacturing process, is used as the standard, and the product weight slab that can be manufactured is used as the standard slab. Most manufacture products.

In other words, regarding the batch annealing equipment, the size and weight of the coil that can be annealed are determined by the capacity of the batch annealing equipment. On the other hand, other process capacities are large.Therefore, as long as batch annealing equipment is used, design slabs for orders using standard slabs based on batch annealing equipment that is smaller than other process capacity sizes. I could only do it.

[0004]

In recent years, not only batch annealing equipment but also so-called continuous annealing lines have begun to spread on steel production lines. It has become possible to anneal different types of standard slabs.

However, in the slab design, only one type of standard slab is assumed in consideration of the capability of the batch annealing equipment and the like, so that when various orders are given, excess parts increase. There was a problem.

For example, the weight of one standard slab is 20
(T), two orders, ie, “order A:
Order quantity = 25 (t), delivery date January 31 "," Order B:
If the order quantity = 15 (t) and the delivery date January 31 "are given at the same timing, the slab for order A is two standard slabs, that is," 20 (t) × 2 (books) ". When designed, there is a surplus of 15 (t), and the slab for order B is one standard slab, ie, “20 (t) × 1”.
(Books) "has a surplus of 5 (t). In addition, another order C “order C: order quantity = 2
0 (t), delivery date February 10 ", the surplus is allocated. Specifically, surplus 15 for order A
(T) and the surplus 5 (t) for the order B are allotted to the order C, but the surplus is eliminated, but one standard slab is used for the “January 31” shipping and the “February 1”.
On day 0, it will be for shipping. This has a problem in manufacturing process management. In addition, the probability that allocation can be performed cannot be predicted so that there is no surplus. In the above example, by chance,
The only thing that could be done was to allocate so that there was no surplus.

Accordingly, in view of the spread of continuous annealing lines, a slab design method has been developed that ensures a surplus portion is reduced even if various orders are given, assuming a plurality of types of standard slabs. Was desired.

On the other hand, Japanese Patent Application Laid-Open No. 07-204996 discloses a thin sheet production management method in the steel industry. In order to solve the problems that occur for each order type, this is divided into small lot / large lot order, non-continuity order, and continuity order. In comparison, it is limited to reducing the occurrence of partial surplus, we do not necessarily consider the continuity of orders in the future effectively, we can not make and reserve coils,
The lead time was getting longer.

That is, as shown in FIG. 6A, at present, the standard slab is set to 20 (t), and if a repeat order A30 (t), which is a continuous order, is received, two standard slabs are set. Is designed (slab 2, slab 3), and 20 (t) of slab 2 and 10 (t) of slab 3 are assigned to the order. Then, when a product is collected from the order A30 (t), for example, the product is equally divided under the constraint of a product single weight of 5 to 8 (t).
6 (t) coils, and from slab 3, 5.0
Although two coils (t) and a total of five coils have been commercialized, as shown in FIG.
When an order for (t) is received, a new slab 1 (30 (t)) obtained by expanding the standard slab is designed and assigned to an order. 4
So that the weight of the product increases,
You will be able to make and reserve coils.

The present invention has been made in view of the above-mentioned unsolved problems, and an object of the present invention is to perform a design for an order based on a standard pattern slab determined by the constraints of the batch annealing equipment. In consideration of the continuity of the product, by expanding this standard slab and performing order combinations that do not generate a surplus part, even if various orders are given, the product unit weight is large, An object of the present invention is to provide a slab design method in which a surplus portion is reduced.

[0011]

In order to achieve the above object, according to the present invention, in addition to a standard pattern slab, one or more types of enlarged slabs obtained by enlarging the standard pattern slab are prepared, and a slab for an order is prepared. In the design method, when it is determined that there is an order that is continuously received with the same manufacturing specifications, assuming a standard slab and one or more types of expanded slabs expanded in consideration of the capacity of the manufacturing equipment, When any of the enlarged slabs is assigned to the order and there is no surplus, the enlarged slab is assigned to the order. On the other hand, when there is surplus, one having the largest width and length is assigned. This is a slab design method characterized by sequentially assigning orders to different types of enlarged slabs so that there is no surplus.

The present invention described in claim 2 is characterized in that, when the order to be allocated is an order for which continuous orders are received, the surplus allocation is determined for this order amount in consideration of future orders. A slab design method according to claim 1.

According to a third aspect of the present invention, when a slab is designed by combining a standard pattern slab and an enlarged slab, the combined lot of the standard pattern slab and the enlarged slab is compared with the steelmaking capacity and the amount of steel output from the converter is calculated. 3. The slab designing method according to claim 1, wherein the slab is designed in accordance with the lot unit.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. First, a hardware configuration of a system according to an embodiment of the present invention will be described with reference to FIG.

The system 100 includes a CPU 1 for performing predetermined processing in accordance with an operation program, a ROM 4 having a built-in operation program, a RAM 2 functioning as a work area, and the like, and storing necessary information. HDD (hard disk driver) 3 and keyboard 5 for inputting system startup instructions and necessary information
And a CRT 6 for displaying information input via the keyboard 5, information stored in the HDD 3, and the like.
They are connected by a bus 7 so that necessary information can be transmitted and received between them. As described above, the system includes a keyboard 5 as an input device, a CPU 1 as a central processing unit, a RAM 2 as a memory device, an HDD 3, a ROM 4,
Since it is configured to include the CRT 6 as a display device, it can be realized by, for example, one personal computer or a workstation.

FIG. 2 is a functional block diagram showing the hardware shown in FIG. 1 focusing on its functions. In this functional block diagram, reference numeral 20 denotes a continuity judging unit for judging order continuity, and reference numeral 30 denotes a process for enlarging a repeat order slab which is an order of a "repeat slab" which is a slab having order continuity. A repeat order slab enlargement processing unit, 40 is a repeat order order combination processing unit that performs a combination process of “repeat order” as an order of the repeat slab, 12 is a storage unit for storing various information, and 14 is , A display unit for displaying necessary display information, and an input unit 10 for inputting necessary information. The continuity determining unit 20, the repeat order slab enlargement processing unit 30, and the repeat order combination processing unit 40
U1 and ROM containing operation program of CPU1
4, the RAM 2 functioning as a work area, the storage unit 12 corresponds to the HDD 3, the display unit 14 corresponds to the CRT 6, and the input unit 10 corresponds to the keyboard 5. The signal lines connecting the functional units correspond to the bus 7.

Now, the operation performed by the functional block shown in FIG. 2 will be described with reference to a flowchart. FIG. 3 is a flowchart showing an outline of the processing. The storage unit 12 stores one item of information including “manufacturing specifications (order quantity, dimensions, etc.), order date, and customer information” which are past order histories given through the input unit 10. Is stored in advance for each of the orders.

First, when a start instruction is given via the input unit 10, in step S100, the continuity judgment unit 20
Grasps the past order history stored in the storage unit 100. Then, in step S110, the continuity determining unit 20 determines whether or not there is a predetermined number or more orders before the predetermined period, for example, five or more orders (repeat orders) within the past three months. If no is found, the process ends. If there is a repeat order, the process proceeds to step S120.

Now, in step S120, the repeat order slab enlargement processing section 30 performs the repeat order slab enlargement processing. This processing will be described in detail with reference to the flowchart of FIG. In this process, in addition to the standard slab, multiple types (for example, three types) of expanded slabs in which the standard slab is expanded in consideration of equipment restrictions are assumed, and the expanded slab is adopted in place of the standard slab. If the number of slabs to be produced can be reduced and the weight to be tapped becomes an integral multiple of the enlarged slab (no surplus), the slab is designed by using the enlarged slab.

First, in step S10, it is determined whether or not the order is a strictly single product strict instruction order, ie, an order without continuity.
If there is no continuity, the process proceeds to step S12, where a standard material design process, which is a conventional design employing only the standard slab, is performed (corresponding to the "end" process in FIG. 3). Proceed to. In step S14,
Considering the width constraint of the hot-rolling heating furnace (length constraint for slabs)
In the case where the slab length is expanded to the maximum heating furnace width (Max), in the condition of the coil during transportation (the relationship between the width and outer diameter at the time of up-end was evaluated from the viewpoint of safety and the limit of overturning was obtained) Considering the overturn limit, the case where the slab width is expanded to the overturn limit, and considering the coil outer diameter limit due to the equipment restriction on the cold pickling line (hereinafter referred to as PK) entry side, enter the cold PK entry side. It is assumed that the slab length and width are expanded to the maximum (Max), and in consideration of the neck restrictions of the equipment to be used, the heating furnace Max weight obtained from the length and width, the overturn limit weight, In addition, the cold PK entry side Max weight is given via the input unit 10.

Next, in step S16, "Heating furnace Max
It is determined whether or not “weight ≦ overturn limit weight” is satisfied, and if it is satisfied, the heating furnace Max weight is used as a constraint, and if not, the flow proceeds to step S20 which is a cold rolling side condition. . Subsequently, in step S18, it is determined whether or not “heating furnace Max weight ≦ cold PK entry side Max weight” is satisfied.
The process proceeds to step S24 if not established.

In step S20, it is determined whether or not "overturn limit weight≤maximum weight on the cold PK entrance side" is satisfied. If so, the process proceeds to step S26. If not, the process proceeds to step S28. . Then, step S2
The heating furnace Max weight, the cold PK entry side Max weight, the overturn limit weight, and the cold PK entry side Max weight, which are the conclusions of 2, 24, 26, and 28, respectively, are defined as the enlarged slab weight. The expanded slab weight in consideration of the equipment capacity is determined by the above-described comparison processing with the hot rolling and cold rolling restrictions.

Next, in step S34, a comparison is made with the conditions on the steelmaking side, which is the side for supplying the slab.
It is determined whether or not “order weight requiring tapping ≧ slab design application slab weight” is satisfied. If not, the process proceeds to step S40, and if it is, the process proceeds to step S36. In step S36, the order is applied to all the enlarged slab weights (without surplus) to create an enlarged slab. Then, in step S38, the enlarged slab weight is subtracted from the order weight requiring tapping, and the process proceeds to step S34. The processing of steps S36 and S38 is repeated until it is determined as "No" in S34. That is, the combination lot of the standard pattern slab and the enlarged slab is matched with the lot unit of the output from the converter in comparison with the steelmaking capacity.

Then, in a step S40, it is determined whether or not the order weight requiring tapping has become "0".
Otherwise, the process proceeds to step S42, and if "0", the process ends. This step S40 is
This corresponds to the determination of whether or not there is a surplus in step S130 in FIG. 3. In the case of “order weight requiring tapping = 0”, “excess No”, and in the case of “order weight requiring tapping ≠ 0”. This corresponds to “Yes with surplus”. By performing the above-described processing by the repeat order slab enlargement processing unit 30, it is possible to adopt an enlarged slab with good production efficiency and to design a slab with no surplus to the order weight.

It should be noted that steps S30 and S32 shown in FIG. 8 may be added between steps S22, S24 and S28 and step S34 in the steps described in FIG.

First, in step S30, comparison with the conditions on the steelmaking side for supplying the slab is performed in step S30.
Same as 34, but here, the steelmaking side conditions are also taken into account. The continuous casting condition is calculated as the number of slabs for tapping as the number of slabs. In the first case, ie, in the case of a) standard slab design, a calculation of “unallocated product weight ÷ standard slab weight” is performed, and the calculation result is set as the number X. In the second case, ie, b ) In the case of expanded slab design, "unallocated product weight divided by expanded slab weight"
Is calculated, and this calculation result is set as the number Y. In addition,
Here, the unassigned product weight refers to a product that has an order but has not yet been subjected to slab design. Then, in step S32, it is determined whether or not the number of slabs to be tapped can be reduced by expanding the slab, specifically, whether or not “Y <X” is satisfied. The process proceeds to step S42 for use, and if one is satisfied, the process proceeds to step S34 for using the enlarged slab.

Next, as shown in step S140 in FIG. 3, if there is a surplus (including a case where it is more efficient to adopt a standard slab), the process proceeds to step S42 in FIG.
A repeat order combination process, which is the next process, is performed. In the repeat order combination, the future (for example, 3
It is preferable that the expected order quantity be combined in consideration of the order quantity of a month or a short period of six months).

The processing performed by the repeat order combination processing section 40 will be described with reference to FIG. Note that this processing is performed by using one type of enlarged slab having the largest width and length. First, in step S50, surplus order information that is a surplus order is sequentially read from the storage unit 12, and in steps S52 and S54, the surplus order information is stored in a specific area of the storage unit 12 until the data is completed. Store. Then, in step S56, the accumulated surplus order information stored in the specific area is sorted into groups by, for example, the following items. As a grouping item, the same number is already issued in the repeat order (for example, an operation program may be created so that the continuity determination unit 20 issues the same number).
It is designed to: Order repeat No. (number), 2. 2. continuous casting classification; 3. charge code; 4. Slab width; Delivery date and the like.

Next, the remaining information is confirmed in step S57, and step S58 is a step for determining whether or not all the processes for the order have been completed. this is,
This is because the following processing is performed for each order. If all the orders have been completed, this process ends. Otherwise, the process proceeds to step S59.

In step S59, it is confirmed whether or not there is an order weight requiring tapping in the n-th case. If yes, the process proceeds to step S59-1 in order to apply the surplus. In addition,
In step S59-1, whether or not tapping is possible is determined as in step S59-2, including the order information for the n-th and subsequent orders. In step S60, whether the n-th order and the m-th order repeat number are the same. It is determined whether they are the same or not, and if they are the same, the process proceeds to step S62.
Proceed to. In step S62, it is determined whether or not there is a surplus in the enlarged slab of the n-th order. If there is no surplus, the process proceeds to step S68, while if there is a surplus, the process proceeds to step S64. Next, in step S64, it is determined whether or not the inequality expression “excess weight of the nth order-enlarged slab <excess weight of the mth order requiring tapping” is satisfied. If not, the process proceeds to step S66. On the other hand, if the condition is satisfied, an order combination with the m-th and subsequent items is considered.

In step S66, a process of applying the weight required for tapping of the m-th order to the surplus portion of the nth-order enlarged slab is performed to eliminate the tapping of the m-th order (step S70). It returns to S59-1. A process for creating an enlarged slab is performed based on the results obtained up to step S68. By performing the above processing by the repeat order combination processing unit 40, if there is a surplus, the order is sequentially assigned to one type of enlarged slab having the largest width and length, and the slab design is performed so that there is no surplus. can do.

In order to facilitate understanding of the invention, an outline of the repeat order combination processing will be described with reference to FIG. First, as shown in FIG. 7A, it is assumed that five orders of A, B, C, D, and E are repeat orders, and orders are generated in the order of A, B, C, D, and E. In addition, the slab to be assigned an order is a slab having the maximum width and length (maximum width / length slab), 30 (t), in consideration of the facility capacity.

First, when an order A15 (t) of the repeat order is received, the maximum width / length slab is obtained.
Slab 1 is designed and order A15 (t) is assigned. At this time, the surplus portion of the slab 1 is ready for the next order. Next, in order B, 10 (t)
When order is received, order B, 10
(T) is assigned. At this time, the surplus part of the slab 1
Be prepared for the next order. Next, when an order C, 15 (t) is received, the order C, 5 (t) is allocated to the surplus portion of the slab 1. At this time, slab 1
The surplus part of is eliminated. Then, for the remaining 10 (t) of order C, the maximum width / length slabs 2, 3
0 (t) is designed, and the remaining 10 (t) of order C is assigned. At this time, the surplus portion of the slab 2 is ready for the next order.

Next, in the order D, 20 (t)
Is assigned, the order D is assigned to the surplus part of the slab 2. At this time, the surplus portion of the slab 2 disappears. Then, when an order E, 25 (t) is received, the maximum width / length slab 3, 30 (t) is designed, and the order E is assigned to the slab 3. At this time, the surplus portion of the slab 3 is ready for the next order. In this way, the order is sequentially assigned to the maximum width / length slab, and if there is no surplus part, the next maximum width / length slab is designed and processing for continuing the order assignment is performed. At this time, the surplus portion of the maximum width / length slab is allocated so as to always be ready for the next order. By such processing, a surplus portion can be reduced.

As described above, according to the present embodiment, in consideration of the continuity of orders, an enlarged slab is first employed so as not to generate a surplus. Since the enlarged slab is selected and the order is sequentially allocated, the generation of a surplus portion can be suppressed, and the coil can be enlarged. In addition, since the design is made by determining the continuity of the order, it is possible to make and reserve the coil, and the lead time can be reduced.

[0036]

As described above, according to the present invention,
In addition to the standard pattern slab, one or more types of enlarged slabs are prepared. If it is determined that there is an order that has been continuously receiving orders with the same manufacturing specifications, the capacity of the standard slab and the manufacturing equipment will be considered. Assuming one or more types of enlarged slabs expanded and then assigning any of the enlarged slabs to the order, and if there is no surplus, assign the enlarged slab to the order, while the surplus is In some cases,
Since the order is sequentially assigned to one type of enlarged slab with the largest width and length so that there is no surplus,
Even when various orders are given, it is possible to design a slab in which the product single weight is large and the surplus portion is reduced.

[Brief description of the drawings]

FIG. 1 is a hardware configuration diagram of an embodiment according to the present invention.

FIG. 2 is a functional block diagram of an embodiment according to the present invention.

FIG. 3 is a flowchart showing an outline of processing according to the embodiment of the present invention.

FIG. 4 is a flowchart showing a repeat order slab enlargement process.

FIG. 5 is a flowchart showing a repeat order combination process.

FIG. 6 is an explanatory diagram illustrating a repeat order slab enlargement process.

FIG. 7 is an explanatory diagram illustrating a repeat order combination process.

FIG. 8 is a flowchart showing a repeat order slab enlargement process.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 CPU 2 RAM 3 HDD 4 ROM 5 Keyboard 6 CRT 7 Bus 10 Input unit 12 Storage unit 14 Display unit 20 Continuity judgment unit 30 Repeat order slab enlargement processing unit 40 Repeat order combination processing unit

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kazushi Sasai 1-chome, Mizushima-Kawasaki-dori, Kurashiki-shi, Okayama Pref. Chome (without street address) Inside Kawanishi Information System Co., Ltd. West Japan Office

Claims (3)

[Claims] 1. A method of preparing one or more types of enlarged slabs in addition to a standard pattern slab and designing a slab for the order, wherein there is an order continuously receiving orders with the same manufacturing specifications. If it is determined that one of the expanded slabs is assigned to the order, assuming a standard slab and one or more expanded slabs expanded in consideration of the capacity of the manufacturing equipment, and if there is no surplus, In order to assign the enlarged slab to the order, on the other hand, if there is a surplus, the order is sequentially assigned to one type of enlarged slab having the largest width and length so that the surplus is eliminated. Design method. 2. The method according to claim 1, wherein when the order to be assigned is an order for which continuous orders are received, a surplus allocation judgment is performed on the order amount in consideration of future orders.
The slab design method described. 3. When a slab is designed by combining a standard pattern slab and an enlarged slab, a combination lot of the standard pattern slab and the enlarged slab is designed in accordance with a lot unit of the output of a converter in comparison with a steelmaking capacity. The slab design method according to claim 1 or 2, wherein: