A strip steel billet design system based on order and process constraints

Abstract

The invention discloses a strip steel billet design system based on order and process constraints, comprising an establishment module and a development module. The establishment module is used for establishing a strip steel billet design benchmark library based on an Oracle database; the development module is provided with a development benchmark maintenance unit, a development object order selection unit, a development steel billet design logic unit and a steel billet design result correction unit; the development benchmark maintenance unit is used for storing data in the strip steel billet design benchmark library based on the Oracle database, and performing maintenance of corresponding standards through an HMI; the development object order selection unit is used for determining object order information of steel billet design and steel billet design standards suitable for production conditions; the development steel billet design logic unit is used for one-key automatic design through an HMI; the steel billet design result correction unit is used for studying and analyzing the design results of steel billets and modifying design errors; the strip steel billet design automation is realized, the labor intensity of planners is reduced, the work efficiency of production planning is improved, and the amount of surplus materials is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of steel, and in particular relates to a strip steel billet design system based on order and process constraints. Background Art

[0002] The production and operation of steel enterprises must not only meet the personalized needs of customers' orders for multiple varieties, multiple specifications, and small batches, but also adapt to large-scale production. It is inevitable to build an order-driven integrated sales and production production and operation system. The core of the integrated sales and production system is the production planning and scheduling business with orders as the core object, and the key link in production planning and scheduling is the design of intermediate steel billets. The difficulty of steel billet design lies in meeting customer orders and adapting to the capacity conditions of process equipment, and designing the optimal parameters of the steel billet (width, length, unit weight, quantity) to ensure the minimum order margin and the maximum billet specification size.

[0003] With the development of information technology, although most steel companies have put the MES (Manufacturing Execution System) system online, the design of steel billets based on order and process constraints is still manual or semi-automatic. The work intensity of planners is high and the work efficiency is low, resulting in a large amount of waste materials.

[0004] Therefore, a strip steel billet design system based on order and process constraints is needed. Summary of the invention

[0005] The purpose of the present invention is to provide a strip steel billet design system based on order and process constraints, to realize the automation of strip steel billet design, to reduce the labor intensity of planners, to improve the work efficiency of production planning, and to reduce the amount of surplus material.

[0006] The technical solution adopted by the present invention to solve the technical problem is: a strip steel billet design system based on order and process constraints, including an establishment module and a development module, the establishment module is used to establish a strip steel billet design benchmark library based on an Oracle database;

[0007] The development module is equipped with a development benchmark maintenance unit, a development object order selection unit, a development billet design logic unit, and a billet design result correction unit;

[0008] Develop a benchmark maintenance unit to store data in the Oracle database-based strip steel billet design benchmark library and maintain the corresponding standards through the HMI;

[0009] Develop an object order selection unit for determining object order information for billet design and billet design standards suitable for production conditions;

[0010] Developed a billet design logic unit to enable one-click automatic design through HMI;

[0011] The billet design result correction unit is used to study and analyze the billet design results and modify design errors.

[0012] Specifically, the development of the billet design logic unit includes items for converting order quantity into billet quantity, one-time billet design items considering equipment constraints, one-time billet design weight items considering the producible unit weights of hot rolling and cold rolling and improving the billet, one-time billet division number calculation item, billet unit weight and total number of sheet determination items, and billet width and length determination items.

[0013] Specifically, the order quantity is converted into a steel billet quantity item, which is used to receive customer order quantity, packaging unit weight, and delivery allowable tolerance information from the order process management, and calculate the applicable yield rate by multiplying the yield rate of each process. According to the customer's delivery allowable tolerance and the applicable yield rate, the order quantity is converted into steel billet quantity.

[0014] Specifically, the one-time billet design item taking equipment constraints into consideration receives target hot-rolled coil width information from quality design results, reads the continuous casting equipment constraint benchmark from the benchmark library to obtain the thickness, width and length of the billet that can be produced; reads the hot rolling equipment constraint benchmark to obtain the thickness, width, length and trimming range of the billet that can be produced; reads the specific gravity benchmark information, and calculates the width, length and unit weight range of the one-time billet design by comprehensively considering the process constraints.

[0015] Specifically, the method considers the producible unit weight of hot rolling and cold rolling and improves the first designed unit weight of the steel billet, considers the maximum value of the producible unit weight of hot rolling and the producible unit weight of cold rolling, and improves the first designed unit weight of the steel billet in the first steel billet design item considering the equipment constraints.

[0016] Specifically, the calculation item for the maximum number of steel billet divisions is the maximum number of steel billet divisions = maximum value of the steel billet unit weight range / maximum value of the packaging unit weight.

[0017] Specifically, the items for determining the single weight and total number of steel billets include calculating the number of steel billet divisions and single weight range levels, calculating the total number of steel billets that can be produced, and the total design quantity of steel billets for two times.

[0018] Specifically, the width and length of the steel billet are determined by the following calculation:

[0019] Width Min = Max ((single weight of steel billet / (thickness * length Max * specific gravity)), 1st width design value Min);

[0020] Width Max = Min ((single weight of steel billet / (thickness*length Min*specific gravity)), 1st width design value Max);

[0021] Length Min = Max ((single weight of steel billet / (thickness * width Max * specific gravity)), 1st length design value Min);

[0022] Length Max = Min ((single weight of steel billet / (thickness x width Min x specific gravity)), 1st length design value Max);

[0023] If the continuous casting equipment has a commonly used billet width, the billet width is determined between the calculated width Min and Max.

[0024] Specifically, the reference library includes a continuous casting equipment constraint reference table, a hot rolling equipment constraint reference table, a hot rolling fixed width reference table, a hot rolling rollable weight reference table and a factory yield rate reference table.

[0025] Specifically, the object order information includes whether it is a stock order, the order product width, length and packaging unit weight range, design waiting time, and operation deadline; the billet design standard includes the maximum unit weight of the slab and the maximum unit weight of the product.

[0026] The present invention has the following beneficial effects: the present invention realizes the automated design of strip steel billets, which not only meets customer orders but also can adapt to process equipment conditions, designs the optimal width, length, unit weight, and quantity of the billets, ensures the minimum order margin and the maximum billet specification size, reduces the labor intensity of planners, and improves work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A structural diagram of the system architecture.

[0028] Figure 2 Flowchart of the logic unit for developing a steel billet. DETAILED DESCRIPTION

[0029] The present invention will now be described in further detail with reference to the accompanying drawings.

[0030] like Figure 1-2 , a steel enterprise inquiry benefit calculation system, including: an establishment module, a development module and an environment deployment module.

[0031] 1. Create a module

[0032] The design establishes a strip steel billet design benchmark library based on Oracle database, including the following benchmark tables: continuous casting equipment constraint benchmark table, hot rolling equipment constraint benchmark table, hot rolling fixed width benchmark table, hot rolling rollable weight benchmark table, and factory yield rate benchmark table.

[0033] 2. Development Module

[0034] (1) Development of benchmark maintenance unit

[0035] Develop a maintenance function for billet design standards (reference table in 1) to store data in an Oracle database to establish a reference library, so that personnel proficient in production processes can maintain the corresponding standards through the HMI.

[0036] (2) Development target order selection unit

[0037] Develop the object order selection unit to determine the object order information of the billet design, including: checking whether the order of the design object is a stock order, the width, length and packaging unit weight range of the order product, the design waiting amount, the operation deadline, etc. It is used to determine the billet design standards suitable for production conditions: the maximum unit weight of the slab, the maximum unit weight of the product, etc.

[0038] (3) Development of billet design logic unit

[0039] The width, length, unit weight and quantity of the steel billet are designed by comprehensively considering the specifications of the continuous casting and rolling equipment (hot rolling trimming amount, production capacity, etc.) and the unit weight range requirements of the products.

[0040] First, the order quantity (product production volume) is converted into the total amount of billets by considering the yield rate, and then the unit weight range is calculated after the billets are split to make the unit weight range match the optimal number of billets, and then the width, length range, and target unit weight value are calculated again. The planner can perform one-click automatic design through the HMI.

[0041] (4) Billet design result correction unit

[0042] Finally, the design results of the steel billet are studied and analyzed and the design errors are corrected.

[0043] 3. System environment deployment module

[0044] The server and storage environment for the developed functional software deployment are shown in Table 3-1.

[0045] Table 3-1: System deployment environment description

[0046]

[0047]

[0048] 4. Example of developing a billet design logic unit

[0049] like Figure 1 The present invention is further described in detail by taking a steel enterprise as an example. The specific implementation logic method of the steel billet design function is as follows:

[0050] (1) Order volume converted into billet volume

[0051] Receive customer order quantity, packaging unit weight, delivery tolerance and other information from order process management, calculate the applicable yield rate by multiplying the yield rate of each process, and convert the order quantity into billet quantity based on the customer's delivery tolerance and the applicable yield rate.

[0052] For example: The customer's order quantity is 245 tons, the packaging unit weight is 8 to 12 tons, and the delivery tolerance is ±5%.

[0053] ①Consider delivery tolerance

[0054] The total design quantity of steel billet is 245*(1-5%)~245*(1+5%)=232.75~257.75ton.

[0055] ② Consider the comprehensive yield rate (assumed to be 0.867)

[0056] The total design quantity of steel billet once = (232.75 ~ 257.75 tons) / 0.867 = 268.45 ~ 296.71 tons,

[0057] Designed packaging weight = (8-12 tons) / 0.867 = 9.23-13.84 tons.

[0058] (2) Primary billet design considering equipment constraints

[0059] Receive the target hot-rolled coil width information from the quality design results; read the continuous casting equipment constraint benchmark from the benchmark library: producible thickness, width, length; read the hot rolling equipment constraint benchmark: producible thickness, width, length / trimming range, etc. Read the specific gravity benchmark information; comprehensively consider the process constraints to calculate the width, length, and unit weight range of the slab design; the calculation rules are as follows:

[0060] Width Min = Max (continuous casting producible width Min, hot rolling producible width Min, target hot rolling coil width + trimming range Min value);

[0061] Width Max = Min (Maximum width that can be produced by continuous casting, Maximum width that can be produced by hot rolling, Maximum value of target hot rolling coil width + Max value of trimming range);

[0062] Length Min = Hot rolling producible length Min;

[0063] Max length = Max length that can be produced by hot rolling;

[0064] Unit weight = thickness * width * length * specific gravity;

[0065] For example: continuous casting can produce widths of 900 to 2000 mm, hot rolling can produce widths of 700 to 1650 mm, hot rolling trimming range is 20 to 130 mm, target hot rolled coil width is 1228 mm, hot rolling can produce lengths of 5500 to 11880 mm, continuous casting production thickness is 250 mm, and the steel specific gravity is 7.82 ton / m.

[0066] ① Calculation of billet width

[0067] Billet width Min = Max (900, 700, (1228 + 20)) = 1248 mm;

[0068] Billet width Max = Min (2000, 1650, (1228 + 130)) = 1358 mm;

[0069] ② Calculation of billet length

[0070] Billet length = 5500 ~ 11880mm,

[0071] ③ Calculation of the range of unit weight of steel billets

[0072] Min. weight of steel billet = 250 / 10*1248 / 10*5500 / 10*7.82 = 13.42 ton,

[0073] Max single weight of steel billet = 250 / 10*1358 / 10*11880 / 10*7.82 = 31.54 ton.

[0074] (3) Considering the single weight that can be produced by hot rolling and cold rolling, the single weight of the steel billet can be improved once.

[0075] Considering the maximum value of hot-rolled producible unit weight and the cold-rolled producible unit weight, improve the billet unit weight designed once in step (2) (if necessary, add the hot-rolled / cold-rolled producible unit weight calibration value). The maximum value and calibration value of hot-rolled producible unit weight and the value and calibration value of cold-rolled producible unit weight are defined by the benchmark information.

[0076] For example: the maximum weight of the billet produced by hot rolling is 30.9 tons, the calibrated weight of the billet produced by hot rolling is -0.05 tons, the weight of the hot rolled coil produced by cold rolling is 9.5 to 35 tons, the calibrated weight of the hot rolled coil produced by cold rolling is -0.05 tons, and the designed weight of the billet in step (2) is 13.42 to 31.54 tons.

[0077] ① Improve the unit weight that can be produced by hot rolling

[0078] Billet weight Max = 30.9-0.05 = 30.85 ton,

[0079] ② Improve the cold-rolled production unit weight

[0080] Cold rolling can produce single weight Max value = 35-0.05 = 34.05 ton,

[0081] The designed unit weight of 13.42 to 30.85 tons is included in the cold-rolled producible unit weight of 9.5 to 34.05 tons. Therefore, after considering the producible unit weight constraints of hot rolling and cold rolling, the designed unit weight range of the steel billet is determined to be 13.42 to 30.85 tons.

[0082] (4) Calculation of the maximum number of steel billet divisions

[0083] Considering the packaging unit weight required by the customer, calculate and design the number of divisions of a single billet.

[0084] Maximum number of steel billet divisions = Maximum value of steel billet unit weight range / Maximum value of packaging unit weight,

[0085] Calculate the decimal point of the maximum number of steel billet divisions and perform carry processing.

[0086] For example: the design result of the unit weight of the steel billet in step (3) is 13.42 to 30.85 tons, and the unit weight range of the package in step (1) is 9.23 to 13.84 tons.

[0087] ① Calculation of the number of steel billet divisions

[0088] Maximum number of steel billet divisions = 30.85 / 13.84 = 2.23,

[0089] ② Carrying of decimal places

[0090] The maximum number of final billet divisions = 2.23 → 3

[0091] (5) Determination of single weight and total number of billets

[0092] Based on the total design quantity of steel billets calculated in step (1), the packaging unit weight range, the steel billet unit weight designed and calculated in step (3), and the maximum number of steel billet divisions calculated in step (4), the final steel billet unit weight, number of divisions, and total number of steel billets produced are determined.

[0093] 1) Calculate the number of steel billet divisions and the range of unit weight

[0094] The possible unit weight range of the billet is calculated by dividing the billet into smaller numbers than the maximum number of divisions. The unit weight range of the billet is calculated based on the packaging unit weight range in step (1) and the first design unit weight after improvement in step (3).

[0095] For example: the design result of the single weight of the steel billet in step (3) is 13.42 to 30.85 tons, the single weight range of the packaging in step (1) is 9.23 to 13.84 tons, and the maximum number of divisions of the steel billet in step (4) is 3.

[0096] ①If divided into 3 pieces, the unit weight of the steel billet: 27.69~30.85Ton (minimum unit weight of packaging * 3~maximum unit weight of steel billet)

[0097] ②If divided into 2 pieces, the unit weight of the steel billet: 18.46~27.68Ton (minimum unit weight of packaging * 2~maximum unit weight of packaging * 2)

[0098] ③If not split, the unit weight of the steel billet: 13.42~13.84Ton (the minimum unit weight of the steel billet design~the maximum unit weight of the packaging)

[0099] 2) Calculate the total number of billets that can be produced

[0100] According to the number of divisions and the range of unit weight of the steel billets that can be produced, the total number of steel billets that can be produced is calculated. The calculation rules are as follows:

[0101] Calculate the total number of billets that can be produced = (total minimum design quantity of billets at one time / maximum possible single weight of billets according to the number of divisions and layers) ~ (total maximum design quantity of billets at one time / minimum possible single weight of billets according to the number of divisions and layers).

[0102] For example: the total design quantity of steel billets in step (1) is 268.45-296.71 tons, the design result of the single weight of steel billets in step (3) is 13.42-30.85 tons, and the packaging single weight range in step (1) is 9.23-13.84 tons. The total number of steel billets that can be produced is calculated as shown in Table 4-1.

[0103] Table 4-1: Calculation table of the total number of billets that can be produced

[0104]

[0105] 3) Calculation of the total design quantity of steel billets for the second time

[0106] According to the calculation of the number of divisions in step 1) and the total number of billets that can be produced in step 2), the total billet design quantity is calculated twice. The calculation rules are as follows:

[0107] Total design quantity of steel billets for the second time = single weight of steel billets that can be produced * total number of steel billets (must be within the range of total design quantity for the first time),

[0108] Considering the total design quantity of steel billets, unit weight of steel coils, number of steel coils, unit weight of steel billets, and number of steel coils, the final unit weight and total number of steel billets are determined.

[0109] For example: the total design quantity of steel billet is 268.45-296.71 tons, the design result of steel billet unit weight is 13.42-30.85 tons, the packaging unit weight range is 9.23-13.84 tons, and the calculation of steel billet production twice is shown in Table 4-2.

[0110] Table 4-2: Secondary design of producible steel billets

[0111]

[0112] Considering the total design quantity of steel billets, the unit weight of steel coils, the number of steel coils, the unit weight of steel billets, and the number of steel coils, the final unit weight and total number of steel billets are determined. The final unit weight and total number of steel billets are determined as shown in Table 4-2, where the total number of steel billets is 11. The second design unit weight of steel billets is 26.97 tons, the total design quantity of steel billets is 296.71 tons, and the total design number of steel billets is 11.

[0113] (6) Determination of billet width and length

[0114] The width and length of the billet are determined by the first design value of the billet weight, billet width and length. The calculation rules are as follows:

[0115] Width Min = Max ((single weight of steel billet / (thickness * length Max * specific gravity)), 1st width design value Min);

[0116] Width Max = Min ((single weight of steel billet / (thickness*length Min*specific gravity)), 1st width design value Max);

[0117] Length Min = Max ((single weight of steel billet / (thickness * width Max * specific gravity)), 1st length design value Min);

[0118] Length Max = Min ((single weight of steel billet / (thickness x width Min x specific gravity)), 1st length design value Max);

[0119] If the continuous casting equipment has a commonly used billet width, the billet width is determined between the calculated width Min and Max.

[0120] For example: The single weight of the steel billet determined in (5) is 26.97 tons, the first design value of the width in (2) is 1248-1358 mm, and the first design value of the length is 5500-11880 mm.

[0121] ①Width calculation

[0122] Width Min = Max ((26.97 / (250 / 10*11880 / 10*7.82))*1000,1248) = 1248 mm,

[0123] Width Max = Min ((26.97 / (250 / 10*5500 / 10*7.82))*1000,1358) = 1358 mm,

[0124] ② Length calculation

[0125] Length Min = Max ((26.97 / (250 / 10*1358 / 10*7.82))*1000,5500mm) = 10159mm,

[0126] Length Max = Min ((26.97 / (250 / 10*1248 / 10*7.82)*1000), 11880mm) = 11054mm,

[0127] ③Determine the width and length

[0128] If the commonly used billet width is 1000, 1250, 1400, 1600, 1750, 1950 mm,

[0129] Final billet width (determined within the range of 1248-1358mm) 1250mm,

[0130] The final billet length is (26.97 / (25010*125010*7.82))*1000→11036mm.

[0131] A strip steel billet design system based on order and process constraints comprehensively considers factors such as customer orders, steel rolling process yield rate and steel rolling process equipment capacity constraints, and determines the optimal billet design, including billet thickness, billet width, billet length and billet unit weight, to maximize billet specifications and minimize order margins.

[0132] Attached Figure 2 The Slab in it means steel billet.

[0133] The present invention is not limited to the above-mentioned implementation modes, and anyone should be aware of the structural changes made under the enlightenment of the present invention, and all those having the same or similar technical solutions as the present invention fall within the protection scope of the present invention.

[0134] The techniques, shapes, and structural parts not described in detail in the present invention are all well-known techniques.

Claims

1. A strip steel billet design system based on order and process constraints, characterized in that: It includes establishment module, development module and establishment module, which are used to establish a strip steel billet design benchmark library based on Oracle database; The development module is equipped with a development benchmark maintenance unit, a development object order selection unit, a development billet design logic unit, and a billet design result correction unit; Develop a benchmark maintenance unit to store data in the Oracle database-based strip steel billet design benchmark library and maintain the corresponding standards through the HMI; Develop an object order selection unit for determining object order information for billet design and billet design standards suitable for production conditions; Developed a billet design logic unit to enable one-click automatic design through HMI; The billet design result correction unit is used to study and analyze the billet design results and correct design errors; Develop the billet design logic unit, including the conversion of order quantity into billet quantity, the first billet design item considering equipment constraints, the first billet design item considering the producible unit weight of hot rolling and cold rolling and improving the unit weight of the billet, the calculation item of the maximum number of billet divisions, the determination item of the unit weight and total number of billets, and the determination item of the billet width and length; Considering the equipment constraints, the first steel billet design item receives the target hot-rolled coil width information from the quality design result, and reads the continuous casting equipment constraint benchmark from the benchmark library to obtain the thickness, width, and length of the steel billet that can be produced; reads the hot rolling equipment constraint benchmark to obtain the thickness, width, length, and trimming range of the steel billet that can be produced; reads the specific gravity benchmark information, and comprehensively considers the process constraints to calculate the width, length, and unit weight range of the first steel billet design; The items for determining the single weight and total number of steel billets include calculating the number of steel billet divisions and single weight range levels, calculating the total number of steel billets that can be produced, and the total design quantity of steel billets for the second time.

2. The strip steel billet design system based on order and process constraints according to claim 1, characterized in that: The order quantity is converted into a billet quantity item, which is used to receive customer order quantity, packaging unit weight, and delivery tolerance information from the order process management, and calculate the applicable yield rate by multiplying the yield rate of each process. According to the customer's delivery tolerance and the applicable yield rate, the order quantity is converted into billet quantity.

3. The strip steel billet design system based on order and process constraints according to claim 1, characterized in that: The method takes into account the producible unit weight of hot rolling and cold rolling and improves the first designed unit weight of the steel billet, takes into account the maximum value of the producible unit weight of hot rolling and the producible unit weight of cold rolling, and improves the first designed unit weight of the steel billet in the first steel billet design item that takes into account the equipment constraints.

4. The strip steel billet design system based on order and process constraints according to claim 1, characterized in that: The calculation item for the maximum number of steel billet divisions is the maximum number of steel billet divisions = maximum value of the steel billet unit weight range / maximum value of the packaging unit weight.

5. The strip steel billet design system based on order and process constraints according to claim 1, characterized in that: The width and length of the steel billet are determined by the following calculation: Width Min = Max ((single weight of steel billet / (thickness * length Max * specific gravity)), 1st width design value Min); Width Max = Min ((single weight of steel billet / (thickness*length Min*specific gravity)), 1st width design value Max); Length Min = Max ((single weight of steel billet / (thickness * width Max * specific gravity)), 1st length design value Min); Length Max = Min ((single weight of steel billet / (thickness x width Min x specific gravity)), 1st length design value Max); If the continuous casting equipment has a commonly used billet width, the billet width is determined between the calculated width Min and Max.

6. The strip steel billet design system based on order and process constraints according to claim 1, characterized in that: The reference library includes a continuous casting equipment constraint reference table, a hot rolling equipment constraint reference table, a hot rolling fixed width reference table, a hot rolling rollable weight reference table and a factory yield rate reference table.

7. The strip steel billet design system based on order and process constraints according to claim 1, characterized in that: The object order information includes whether it is a stock order, the width, length and packaging unit weight range of the order product, the design waiting time, and the operation deadline; the billet design standards include the maximum unit weight of the slab and the maximum unit weight of the product.

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