JP3052750B2 - Product history management method and management system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for managing a product history from a slab to an intermediate product such as a billet, and further to a product such as a wire and a plate, and a system used for implementing the method.

[0002]

2. Description of the Related Art FIGS. 11 and 12 are explanatory diagrams of history information used in a conventional product history management method described in Japanese Patent Application Laid-Open No. 5-298327, in which charge (CH) → slab ( SL) (Steel tapping to slab yard) → Coil (rolling completed to finishing yard) → Winding (pickling to cold rolling to annealing to final stroke) → Thin sheet product (certification to mechanical testing to production accounting to shipping)
Shows up to completion.

[0003] When a tapping operation is performed, key information CH1 is added to component value information such as the ratio of carbon and manganese to be edited as a process database. The tapping weight information is given and they are compiled as a common database. The information edited in the common database is edited as a charge history for each necessary period, such as one week or one month, based on the tapping date.

When a slab is cut into a plurality of billets by a cutter, the number of each billet, a process code (AK201),
SL1 which is key information is added to the piece weight information and edited as a process database, and when each steel slab is received in the slab yard, the number of the receiving order and the process symbol (HS3
10) The key information SL1 is added to the piece weight information and edited as a process database. Then, the date when each operation was performed is added to the information, and the information is edited as a common database. The information edited in the common database is edited as a slab history for each required period based on the tapping date.

[0005] Each time the rolling and transferring steps to the finishing front yard are completed, the work order number and the process symbol (HK31) are used.
0, HS331), key weight SL with information on piece weight and number of flaws
1 is assigned and edited as a process database. Then, material information (material key), which is the key information of the previous process and the date, is added and edited as a common database. It is edited as a coil history for each necessary period based on the date. In the case of winding including pickling, cold rolling, annealing and final steps, and products including verification, mechanical testing, production accounting and shipping, the order of operations, process symbols, The key information is added to the information on the piece weight and the number of flaws, and each is edited in the process database. Then, the date and the material key are added and edited in the common database, and are edited as a winding history and a product history for each necessary period.

[0006] This makes it possible to read out, for example, the charge history or slab history in the past one month, to manage whether or not a sudden problem has occurred in those processes, and to assign the material key and each number Based on this, a product history from charge to shipment of a thin plate product can be created to perform consistent management of the manufacturing process.

[0007]

However, in the conventional method, it is not possible to obtain the result of the process in which the product flaw occurred in the product history from the slab to the intermediate product to the product. Although such information can be obtained from such a history, it is not possible to obtain information on the cause of the occurrence of the flaw. Therefore, there is a problem that work efficiency is low and many years of experience are required to obtain a highly accurate result.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to provide a method for managing a product history which can easily determine the cause of the occurrence of a flaw, and a management system used for implementing the method. To provide.

[0009]

According to a first aspect of the present invention, there is provided a method for managing a product history, comprising cutting off an end of a slab, rolling and cutting the end, and cutting off the end to produce an intermediate product. In the case where each intermediate product is rolled and the end is cut off to manufacture a product, information relating to the quality of each of the slab, intermediate product and product is taken in, and key information relating to the manufacturing order is included in each information. In the method of assigning and editing the information based on the key information and managing the product history, the length, the cutting length and the rolling direction of each of the products are respectively taken in, and the product length is calculated based on the taken-in length and the cutting length. To determine the growth rate of the intermediate product and the product,
Calculate the relative positional relationship between each product using the obtained elongation rate and imported rolling direction, while operating each product.
It is characterized in that information relating to quality including information and defect information is respectively taken in accordance with the rolling direction of each product, and the information between each product is associated based on the calculated positional relationship.

[0010] A product history management system according to a second aspect of the present invention cuts an end of a slab, rolls and cuts the end, cuts the end, and manufactures an intermediate product. In the case of manufacturing a product by rolling and cutting off the end thereof, information on the quality of each of the slabs, intermediate products and products is taken in, and key information is added to each information in the order of production, and the key information is added. In the system for managing the product history by editing the information based on the information, the length of each of the products, the cut length and the rolling direction are captured, respectively, and the intermediate product and the product based on the captured length and the cut length. A means for calculating the elongation rate of the product, and a means for calculating a relative positional relationship between the products using the obtained elongation ratio and the taken-in rolling direction.
And information relating to quality including operation information and defect information about the respective products in accordance with the rolling direction of each product, and means for associating the information between the products based on the calculated positional relationship. .

[0011]

FIG. 2 is a schematic view showing how information is taken in a wire rod manufacturing process. In the figure, T is a slab. A plurality of slabs T are cast, for example, by continuous casting.
Is rolled and cut into a plurality of billets K, each of which is subjected to finish rolling or the like to be made into a wire S.

In the present invention, such a casting step,
In each step of the rolling / cutting process into the billet K and the finishing process into the wire rod S, the length of the slab T, the billet K and the wire rod S, the crop length which is the cut end length, and the rolling direction, and Information on quality such as operation information and defect information and management information indicating whether or not all of the information has been obtained are taken in, and key information including the serial number of the product and the serial number of the previous product is acquired. Each is given. Then, the aforementioned information is systematically edited based on the key information.

Based on the edited length and the crop length, the elongation rates of the intermediate product and the product are obtained based on the following equation (1). Elongation rate = (length of the relevant product + crop length) / length of the previous product ... (1)

Then, for example, the relative positional relationship between the products is calculated as follows. Based on the following formulas (2) to (5), the length of the wire S and the crop length of the wire are converted into the length of the steel slab K or the length of the slab T, and the formulas (6) and (7) ) Based on the formula, the length of the slab K and the length of the crop are converted into the length of the slab T. Wire length (Steel equivalent) = Wire length / Elongation rate (K → S) ... (2) Wire crop length (Steel equivalent) = Wire crop length / Elongation rate (K → S) ... (3) Wire length S (slab conversion) = wire length / {elongation rate (K → S) × elongation rate (T → K)} (4) wire crop length (slab conversion) = wire crop length / ロ ッ プ elongation rate (K → S) × Elongation rate (T → K)｝ (5) Slab length (converted to slab) = Slab length / elongation rate (T → K) ... (6) Slab crop length (converted to slab) = Slab crop length / elongation rate (T → K) (7) The elongation rate (K → S) is the elongation rate related to rolling from slab K to wire S, and the elongation rate (T → K) is The elongation rate relating to the rolling from the slab T to the slab K is shown.

Then, based on the following equation (8) or (9) and the rolling direction, the wire S is positioned at an arbitrary position in the longitudinal direction.
The corresponding longitudinal position of the billet K or the longitudinal direction of the wire S
In the longitudinal direction of the slab T corresponding to an arbitrary position of the slab K, and the longitudinal direction of the slab K based on the formula (10) and the rolling direction.
By calculating the longitudinal position of the slab T corresponding to an arbitrary position, the relative positional relationship between the products is calculated. The longitudinal direction of the billet corresponding to any position in the longitudinal direction of the wire
Position (length from end) = wire crop length (billet exchange)
+ ) Position in wire (length from end / slab conversion)
... (8) The longitudinal direction of the slab corresponding to an arbitrary position in the longitudinal direction of the wire
Position (length from end) = wire crop length (slab change)
+) Slab crop length (converted to slab) + Position in wire (length from end / slab converted)
... (9) The longitudinal direction of the slab corresponding to an arbitrary position in the longitudinal direction of the slab
Position (length from end) = billet crop length (slab change)
+ ) Position on slab (length from end / slab conversion)
…(Ten)

On the other hand, operation information and defect information for each product
Quality information including information on the rolling direction of each product.
Take in each one. And, based on the positional relationship between each product ,
The information relating to the quality including the operation information and the defect information obtained for each product is associated with each other. In FIG. 2,
Although the steel slab is shown as an intermediate product, the present invention is not limited thereto, and cut-rolled steel strip and a semi-product, rather it may be earthenware pots by the rolling to product finishing this Not even.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below with reference to the drawings showing the embodiments. FIG. 1 is a block diagram showing the configuration of a management system according to the present invention. In the figure, reference numeral 1 denotes a process computer that manages, for example, each manufacturing process from blowing to product in manufacturing a wire. The performance information from the process computer 1 is provided to the business computer 3 via the network 2, where key information including a charge number for blowing and casting, a molecular number for cutting and a piece number, and a piece number are given. Edited to full length information database, management information database,
It is provided to the storage device 4.

FIG. 3 is an explanatory diagram of a roll cutting information database in wire rod production. The left column shows the production process, and the right column shows the information stored in the database. In the blowing process, a charge number is given as key information to blowing information such as a raw material composition, a composition after the blowing, and a weight, and the database is compiled. When a plurality of slabs are cast by continuous casting and the slabs are heated in a heating furnace and then hot-rolled, the slab length, top or bottom crop length, rolling direction ( A charge number and a molecular number are assigned as key information to each piece of information of top rolling or bottom rolling), and the information is compiled into a database.

The rolled and cooled slab is further rolled in the cold, cut into slabs according to the product length, and after being cared for such as scarfing, the slab length, top or bottom crop is cut. A charge, a molecular number, and a piece number are assigned as key information to each information of the length and the rolling direction, and the information is compiled into a database. The prepared steel slab is heated in a heating furnace, then rolled to product dimensions, wound up, inspected, bound and shipped. Then, a charge number, a molecular number, a piece number, and a bundle number are assigned to each information of the product length, the top or bottom crop length, and the rolling direction, and are made into a database.

FIGS. 4 and 5 are explanatory diagrams of the full length information database and the management information database. As shown in FIGS. 4 and 5, each piece of total length information is provided with a charge number and a molecular number as key information for the slab length information and slab management information, and a key number for the slab length information and slab management information. charge number as information, molecular number and piece number is given, the product entire length information and product management information, charge number, molecular number, migraine number and bundle number is the data base of granted as key information.

FIG. 6 and FIG. 7 are explanatory diagrams of the above-described steel slab length information and cast slab length information. As shown in FIG. 6, the slab length information is obtained by dividing the slab K into, for example, 2 sections in the longitudinal direction, 3 sections in the center in the width direction, and sections at the both ends of the section into a total of 5 sections. is there. If there is a flaw in each zone, it is reversed or displayed in color. When a flawed zone is designated, the degree of the flaw length and the number of flaws are displayed for each flaw type. . As for the slab total length information, as shown in FIG. 7, the molten metal level in the mold at the time of continuous casting is digitized for each slab. As the product full length information, information such as surface conditions and defects in the longitudinal direction of each product is stored in a database.

And, for each slab, slab and product,
When rolling cut information and full length information data are available
Is controllable, and either rolling cut information or full length information
If data has not been obtained, it is considered unmanageable and
If it is a slab, the corresponding charge number and minute
A child number is assigned, and if it is a billet, the corresponding char
Gin number, molecular number, and piece number are assigned to the product.
If there is, the corresponding charge number, molecular number, one side
The number and the bundle number are assigned and edited in the management information database.

As shown in FIG. 1, a business computer 3 and a workstation 5 are connected by a network 2. The workstation 5 reads each database stored in the storage device 4 and stores a quality history database relating to the product. Edit and give it to the storage device 6.
When the key information is input, the workstation 5 reads the quality history from the storage device 6 and associates the total length information between the products based on the rolling cut information in the quality history.

FIG. 8 is a flowchart showing a procedure for editing the quality history database in the workstation 5 shown in FIG. The rolling cut information, the total length information, and the management information are read from the storage device (steps S1, S2,
3). Based on the key information of the charge number, molecular number, piece number, and bundle number, a process of editing the roll cutting information, the total length information, and the management information to which the same key information is added in the order of processes is performed (step S4), and the quality history The data is stored in a storage device as a database (step S5).

FIGS. 9 and 10 are flowcharts showing a procedure for associating the total length information between the wire rod and the slab.
When the key information is input, the corresponding history is read from the quality history database (step S11), and the rolling cut information and the total length information are converted into a database (DB) for the product, the billet or the slab based on the management information. It is determined whether or not each of them is present (steps S12, S13, S14). If any one of them is not stored in the database, it is determined that the positioning is impossible and the process is terminated. For products, billets or slabs, if rolling cut information and total length information are stored in a database,
The elongation rate of the product is obtained based on the following equation (1) (step S15). Elongation rate = (length of the relevant product + crop length) / length of the previous product ... (1)

The following equation (2) using the obtained elongation rate:
Based on (5), the length of the product (S) and the crop length of the product are converted into the length of the steel slab (K) or the length of the cast slab (T), and the equations (6) and (7) Based on the equation, the length of the slab and the length of the crop are converted into the length of the slab (step S1).
6). Product length (Sheet conversion) = Product length / Elongation rate (K → S) ... (2) Product crop length (Sheet conversion) = Product crop length / Elongation rate (K → S) ... (3) Product length Sa (slab equivalent) = product length / {elongation rate (K → S) × elongation rate (T → K)} ... (4) Product crop length (slab equivalent) = product crop length / ｛elongation rate (K → S) × Elongation rate (T → K)｝ (5) Slab length (converted to slab) = Slab length / elongation rate (T → K) ... (6) Slab crop length (converted to slab) = Billet crop length / Elongation rate (T → K) ... (7)

From these results, based on the following expression (8) or (9) and the rolling direction, the length of the wire in the longitudinal direction was determined.
The longitudinal position of the steel strip corresponding to the position at will, or wire
The longitudinal position of the slab corresponding to any position in the longitudinal direction
Location, and (10) based on the equation and the rolling direction, elongated slab
By calculating the position of the slab in the longitudinal direction corresponding to an arbitrary position in the direction, the relative positional relationship between the products is calculated (step S17). The longitudinal direction of the billet corresponding to any position in the longitudinal direction of the wire
Position (length from end) = product crop length (billet exchange)
+ ) Position in wire (length from end / slab conversion)
... (8) The longitudinal direction of the slab corresponding to an arbitrary position in the longitudinal direction of the wire
Position (length from end) = product crop length (slab change)
+) Slab crop length (converted to slab) + Position in wire (length from end / slab converted)
... (9) The longitudinal direction of the slab corresponding to an arbitrary position in the longitudinal direction of the slab
Position (length from end) = billet crop length (slab change)
+ ) Position on slab (length from end / slab conversion)
…(Ten)

Then, the total length information obtained for each product is
Uptake respectively with reference to the rolling direction of the goods, on the basis of the positional relationship between the goods, the total length information obtained for each article each
Correspondence is made between products (step S18).

In this embodiment, information relating to quality is associated with a product → a billet / a slab or a slab → a slab.
Although are then manner, the present invention is not limited to this, it is needless to say that may perform correlation for the opposite direction.

[0030]

As described in detail above, according to the present invention, since the product history can be managed by associating the quality information between the products without manual operation, the cause of the defect occurrence can be investigated. And the like can be performed with high efficiency and high accuracy, and the quality of the next operation can be improved.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a system according to the present invention.

FIG. 2 is a schematic diagram showing the capture of information in a wire rod manufacturing process.

FIG. 3 is an explanatory diagram of a roll cutting information database in wire rod production.

FIG. 4 is an explanatory diagram of a full length information database.

FIG. 5 is an explanatory diagram of a management information database.

FIG. 6 is an explanatory diagram of billet full length information.

FIG. 7 is an explanatory diagram of slab total length information.

FIG. 8 is a flowchart showing a procedure for editing a quality history database in the workstation shown in FIG. 1;

FIG. 9 is a flowchart showing a procedure for associating full length information between a wire and a slab.

FIG. 10 is a flowchart showing a procedure for associating full length information between a wire and a slab.

FIG. 11 is an explanatory diagram of history information used in a conventional product history management method.

FIG. 12 is an explanatory diagram of history information used for a conventional product history management method.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Process computer 2 Network 3 Business computer 4 Storage device 5 Workstation 6 Storage device

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G05B 19/418 B23Q 41/08 G06F 17/60

Claims (2)

(57) [Claims] 1. An end of a slab is cut, rolled and cut, and the end is cut to produce an intermediate product. Each intermediate product is rolled, and the end is cut. When manufacturing a product, information relating to the quality of each of the slabs, intermediate products, and products is taken in, key information relating to the order of manufacture is added to each information, and the information is edited based on the key information to produce the product. In the method for managing the history, the length, the cut length, and the rolling direction of each of the products are taken in, and the elongation rates of the intermediate product and the product are obtained based on the taken-in length and the cut length. And calculate the relative positional relationship between each product using the taken-in rolling direction, while including operation information and defect information for each product.
A product history management method, wherein information relating to quality is taken in accordance with the rolling direction of each product, and the information between the products is associated with each other based on the calculated positional relationship. 2. An end of a slab is cut, rolled and cut, and the end is cut to produce an intermediate product. Each intermediate product is rolled, and the end is cut. When manufacturing a product, information relating to the quality of each of the slabs, intermediate products, and products is taken in, key information relating to the order of manufacture is added to each information, and the information is edited based on the key information to produce the product. In a system for managing history, means for obtaining the length, cut length, and rolling direction of each of the articles, respectively, and a means for obtaining an elongation rate of the intermediate product and the product based on the obtained length and cut length. Means for calculating the relative positional relationship between each product by using the elongation rate and the taken-in rolling direction, while operating information and
A product history management system comprising: means for taking in information relating to quality including defect information in accordance with the rolling direction of each product, and associating the information between the products based on the calculated positional relationship. .