CN113112122A - Material lifting method and device for producing split flat plate - Google Patents

Material lifting method and device for producing split flat plate Download PDF

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Publication number
CN113112122A
CN113112122A CN202110295737.0A CN202110295737A CN113112122A CN 113112122 A CN113112122 A CN 113112122A CN 202110295737 A CN202110295737 A CN 202110295737A CN 113112122 A CN113112122 A CN 113112122A
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weight
contract
obtaining
length
coil
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CN113112122B (en
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徐锋
徐进桥
尹云洋
毕世龙
黄君
袁金
王立新
魏斌
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Wuhan Iron and Steel Co Ltd
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Wuhan Iron and Steel Co Ltd
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q10/00—Administration; Management
    • G06Q10/06—Resources, workflows, human or project management; Enterprise or organisation planning; Enterprise or organisation modelling
    • G06Q10/063—Operations research, analysis or management
    • G06Q10/0631—Resource planning, allocation, distributing or scheduling for enterprises or organisations
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q10/00—Administration; Management
    • G06Q10/06—Resources, workflows, human or project management; Enterprise or organisation planning; Enterprise or organisation modelling
    • G06Q10/067—Enterprise or organisation modelling
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q50/00—Systems or methods specially adapted for specific business sectors, e.g. utilities or tourism
    • G06Q50/04—Manufacturing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
    • Y02P90/30—Computing systems specially adapted for manufacturing

Abstract

The invention discloses a material lifting method and a material lifting device for producing an open flat plate, wherein the method comprises the following steps: acquiring contract thickness, contract width, contract length, product production parameters, upper limit of contract delivery quantity, lower limit of contract delivery quantity and maximum continuous casting billet weight during production; obtaining the maximum single coil fixed-length number according to the contract thickness, the contract width, the contract fixed-length, the maximum continuous casting billet single weight and the product production parameters; obtaining a large coil number interval according to the upper limit of the delivery amount of the contract, the lower limit of the delivery amount of the contract and the maximum single coil fixed-size sheet number; obtaining the whole roll number of the large roll and the non-whole roll number of the large roll according to the large roll number interval; and obtaining the total material lifting amount according to the number of the whole large rolls and the number of the non-whole large rolls. The method can greatly reduce the yield of the tail board which does not meet the contract sizing.

Description

Material lifting method and device for producing split flat plate
Technical Field
The invention relates to the technical field of steel processing, in particular to a material lifting method and device for producing an open flat plate.
Background
The hot rolling uncoiling plate is a steel plate which is cut to length according to the requirement of a user after a hot rolling raw coil is uncoiled at a transverse tangent line. In actual production, various large production enterprises generally carry out steel-making feeding production according to the comprehensive yield of the products, and do not make requirements on the weight and the size of a single slab, so that the total length of the output steel coil is not controlled. And when the subsequent flattening and transverse cutting are carried out, the last steel plate is judged as the tail plate because the steel plate does not meet the size requirement of the user. The tail board has no other quality problems, and only because the tail board does not meet the size requirement of the contract, the tail board must be used as a waste product to be subjected to price reduction treatment, so that great loss is caused to enterprises.
Therefore, the problem of high yield of the waste tailing plates exists in the process of producing hot rolling flat plates at present.
Disclosure of Invention
In view of the above problems, the invention provides a material lifting method and device for producing an open flat plate, which can effectively reduce the yield of the waste tailing plate.
In a first aspect, the present application provides the following technical solutions through an embodiment:
a lifting method for producing an open flat plate comprises the following steps:
acquiring contract thickness, contract width, contract length, product production parameters, upper limit of contract delivery quantity, lower limit of contract delivery quantity and maximum continuous casting billet weight during production; obtaining the maximum single coil sizing number according to the contract thickness, the contract width, the contract sizing length, the maximum continuous casting billet weight and the product production parameters; obtaining a large volume interval according to the contract delivery amount upper limit, the contract delivery amount lower limit and the maximum single volume fixed-size sheet number; obtaining the whole roll number of the large roll and the non-whole roll number of the large roll according to the large roll number interval; and obtaining the total amount of the material to be lifted according to the number of the whole large rolls and the number of the non-whole large rolls.
Optionally, the product production parameters include: actual thickness offset, planned increase width of the edge cutting steel plate, actual width offset, fixed length tolerance offset, steel plate density, rolling yield, head and tail cut-off weight and safety margin weight; the obtaining the maximum single coil fixed-length sheet number according to the contract thickness, the contract width, the contract fixed-length, the maximum continuous casting billet single weight and the product production parameters comprises:
obtaining the weight of a single fixed-length steel plate without trimming according to the contract thickness, the actual thickness offset, the contract width, the planned increase width of the trimming steel plate, the actual width offset, the contract fixed-length, the fixed-length tolerance offset and the steel plate density; and obtaining the maximum single-coil fixed-length number according to the maximum continuous casting billet singleness, the rolling yield, the head and tail cut-off weight, the safety margin weight and the weight of the single fixed-length non-edge-cutting steel plate.
Optionally, the obtaining a large volume interval according to the upper limit of the contract delivery amount, the lower limit of the contract delivery amount, and the maximum single volume fixed-length sheet number includes:
obtaining the weight of a single piece of fixed-length trimming steel plate according to the contract thickness, the contract width, the contract fixed-length and the steel plate density; obtaining a contract fixed-length sheet interval according to the contract delivery upper limit, the contract delivery lower limit and the weight of the single fixed-length trimming steel plate; and obtaining the large roll number interval according to the contract fixed-length sheet interval and the maximum single-roll fixed-length sheet.
Optionally, the product production parameters further include: the ratio coefficient of the actual singleness to the theoretical singleness of the steel billet; when the number of the large non-whole rolls is zero, the total material lifting amount is the total weight of the maximum rolled steel blank; the obtaining of the total lifting amount according to the number of the whole large rolls and the number of the non-whole large rolls comprises the following steps:
obtaining the maximum coil weight according to the maximum single coil fixed-length number, the weight of the single fixed-length steel plate without trimming, the weight of the head and the tail which must be cut off and the safety margin weight; obtaining the maximum coil weight of the steel billet according to the maximum coil weight, the rolling yield and the ratio coefficient of the actual single weight of the steel billet to the theoretical single weight; and obtaining the total weight of the maximum rolled steel blank according to the single weight of the maximum rolled steel blank and the number of the whole large-roll rolls.
Optionally, the product production parameters further include: allowing entry into the furnace for a minimum billet weight; when the number of the large-volume non-whole rolls is not zero, obtaining the total lifting amount according to the number of the large-volume whole rolls and the number of the large-volume non-whole rolls, including:
acquiring contract fixed-length sheets; obtaining the minimum coil weight according to the contract cut-to-length number, the number of the whole large coil, the maximum single coil cut-to-length number, the weight of the single cut-to-length steel plate without trimming, the weight of the head and the tail which must be cut off and the safety margin weight; obtaining the minimum coil weight of the steel billet according to the minimum coil weight, the rolling yield and the ratio coefficient of the actual single weight of the steel billet to the theoretical single weight; judging whether the single weight of the minimum coil of steel billet is greater than the minimum weight of the steel billet allowed to enter the furnace; if so, obtaining the total material lifting amount according to the single weight of the minimum coil steel blank and the total weight of the maximum coil steel blank; if not, obtaining the total material lifting amount according to the single weight of the minimum coil of the steel billet, the total weight of the maximum coil of the steel billet and the minimum weight of the steel billet allowed to enter the furnace.
Optionally, the obtaining the total amount of the extracted material according to the single weight of the minimum coil of the steel billet, the total weight of the maximum coil of the steel billet and the minimum weight of the steel billet allowed to enter the furnace includes:
obtaining a target specified-size sheet number according to the weight of the minimum steel billet allowed to enter the furnace and the weight of a single specified-size steel plate without trimming; obtaining the weight of the secondary large coil according to the target number of the specified sizes, the number of the specified sizes of the contract, the number of the whole large coil, the maximum number of the specified sizes of the single coil, the weight of the single specified-size steel plate without trimming, the weight of the head and the tail which must be cut off and the weight of the safety margin; obtaining the single weight of the secondary large coil steel blank according to the coil weight of the secondary large coil, the rolling yield and the ratio coefficient of the actual single weight of the steel blank to the theoretical single weight; and obtaining the total material lifting amount according to the single weight of the secondary large coil steel blank, the single weight of the minimum coil steel blank and the total weight of the maximum coil steel blank.
In a second aspect, based on the same inventive concept, the present application provides the following technical solutions through an embodiment:
a production is opened material lifting device of flat board includes:
the production data acquisition module is used for acquiring the contract thickness, the contract width, the contract length, the product production parameters, the upper limit of the contract delivery quantity, the lower limit of the contract delivery quantity and the maximum continuous casting billet weight during production; the number obtaining module is used for obtaining the maximum single-coil fixed-size number according to the contract thickness, the contract width, the contract fixed-size length, the maximum continuous casting billet single weight and the product production parameters; the first volume number obtaining module is used for obtaining a large volume number interval according to the contract delivery amount upper limit, the contract delivery amount lower limit and the maximum single volume fixed-size number; the second volume number obtaining module is used for obtaining the whole volume number of the large volume and the non-whole volume number of the large volume according to the large volume number interval; and the material lifting amount obtaining module is used for obtaining the total material lifting amount according to the number of the whole large-roll rolls and the number of the non-whole large-roll rolls.
Optionally, the product production parameters include: actual thickness offset, planned increase width of the edge cutting steel plate, actual width offset, fixed length tolerance offset, steel plate density, rolling yield, head and tail cut-off weight and safety margin weight; the number obtaining module is specifically configured to:
obtaining the weight of a single fixed-length steel plate without trimming according to the contract thickness, the actual thickness offset, the contract width, the planned increase width of the trimming steel plate, the actual width offset, the contract fixed-length, the fixed-length tolerance offset and the steel plate density; and obtaining the maximum single-coil fixed-length number according to the maximum continuous casting billet singleness, the rolling yield, the head and tail cut-off weight, the safety margin weight and the weight of the single fixed-length non-edge-cutting steel plate.
Optionally, the first volume number obtaining module is specifically configured to:
obtaining the weight of a single piece of fixed-length trimming steel plate according to the contract thickness, the contract width, the contract fixed-length and the steel plate density; obtaining a contract fixed-length sheet interval according to the contract delivery upper limit, the contract delivery lower limit and the weight of the single fixed-length trimming steel plate; and obtaining the large roll number interval according to the contract fixed-length sheet interval and the maximum single-roll fixed-length sheet.
In a third aspect, based on the same inventive concept, the present application provides the following technical solutions through an embodiment:
a computer-readable storage medium, having stored thereon a computer program which, when being executed by a processor, carries out the steps of the method of any of the first aspects.
The invention provides a material lifting method and device for producing an open flat plate, wherein the method comprises the following steps: acquiring contract thickness, contract width, contract length, product production parameters, upper limit of contract delivery quantity, lower limit of contract delivery quantity and maximum continuous casting billet weight during production; obtaining the maximum single coil fixed-length number according to the contract thickness, the contract width, the contract fixed-length, the maximum continuous casting billet single weight and the product production parameters; obtaining a large coil number interval according to the upper limit of the delivery amount of the contract, the lower limit of the delivery amount of the contract and the maximum single coil fixed-size sheet number; obtaining the whole roll number of the large roll and the non-whole roll number of the large roll according to the large roll number interval; and obtaining the total material lifting amount according to the number of the whole large rolls and the number of the non-whole large rolls. Therefore, the material lifting model can be optimized according to the contract quantity and the size specification, the obtained total material lifting quantity can be optimally matched with the output quantity of the open plate, and the output capacity of the tail plate which does not meet the contract size can be greatly reduced.
The foregoing description is only an overview of the technical solutions of the present invention, and the embodiments of the present invention are described below in order to make the technical means of the present invention more clearly understood and to make the above and other objects, features, and advantages of the present invention more clearly understandable.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts. In the drawings:
fig. 1 is a flow chart illustrating a lifting method for producing an open flat plate according to a first embodiment of the present invention;
fig. 2 shows a schematic structural diagram of a lifting device for producing an open flat plate according to a second embodiment of the present invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
First embodiment
Referring to fig. 1, fig. 1 shows a flow chart of a lifting method for producing an open flat plate according to a first embodiment of the present invention. The method comprises the following steps:
step S10: and acquiring the contract thickness, the contract width, the contract length, the product production parameters, the upper limit of the contract delivery quantity, the lower limit of the contract delivery quantity and the maximum continuous casting billet weight during production.
In step S10, the demand enterprise provides the production enterprise with demand information, such as orders and contracts, according to the actual demand. The requirement information includes, but is not limited to, contract thickness, contract width, contract length, contract number of cut sheets, upper limit of contract delivery amount, and lower limit of contract delivery amount corresponding to the opening board. In addition, production enterprises can follow certain production indexes during production, different enterprises have different production equipment or different production standards and may have different product production parameters and maximum continuous casting billet singles during different productions. The production parameters of the product comprise: actual thickness offset, planned increase width of the cut steel plate, actual width offset, fixed length tolerance offset, steel plate density, rolling yield, head and tail cut-off weight, safety margin weight, ratio coefficient of actual singles to theoretical singles of the steel billet, minimum allowable billet weight to enter the furnace, shape coefficient of the continuous casting billet and the like. The product production parameters are known data.
When the production parameters of the product are obtained, the production parameters can be obtained according to the historical data, for example, the average value of the historical data in a certain time period is used as the production parameters of the product currently used for generation. For example, the historical average values of different parameters are classified and counted according to varieties and specifications, and the following can be obtained:
Δ 1, actual thickness offset,/mm; delta 2, the planned increase width of the trimming steel plate,/mm; Δ 3, actual width offset,/mm; Δ 4, the cut-to-length tolerance offset,/mm; alpha, rolling yield, which is percentage; beta, the ratio coefficient of the actual single weight to the theoretical single weight of the steel billet is percentage; k, the shape coefficient of the continuous casting billet, namely the obtuse angle continuous casting billet K generally takes a value of 0.994, and the right angle continuous casting billet K takes a value of 1.0.
Step S20: and obtaining the maximum single coil sizing sheet number according to the contract thickness, the contract width, the contract sizing length, the maximum continuous casting billet weight and the product production parameters.
In step S20, first, the weight of a single piece of cut-to-length non-cut steel sheet can be obtained from the contract thickness, the actual thickness offset, the contract width, the planned increase width of the cut steel sheet, the actual width offset, the contract cut length, the cut length tolerance offset, and the steel sheet density. Specifically, the weight of a single sized uncut steel plate can be expressed as:
T1＝(h+Δ1)*(w+Δ2+Δ3)*(l+Δ4)*ρboard
Wherein T1 is the weight of a single fixed-length steel plate without trimming edges; h is the contract thickness; Δ 1 is the actual thickness offset,/mm; delta 2 is increased for the planning of edge cutting of steel plateAdding width,/mm; Δ 3 is the actual width offset,/mm; delta 4 is the length tolerance offset,/mm; w is the contract width; l is the contract length; rhoBoardThe density of the steel plate is, for example, that of carbon steel, which can be 7.85 × 103kg/m3。
And then, obtaining the maximum single-coil fixed-length number according to the maximum continuous casting billet weight, the rolling yield, the head and tail cut-off weight, the safety margin weight and the weight of the single fixed-length non-edge-cutting steel plate. Specifically, the maximum number of single-coil cut-to-length sheets can be expressed as:
n1′＝(M0*α-w1-w2)/T1
n 1' rounds down to n1 according to the calculation result. Wherein n1 is the maximum single coil fixed-length sheet number, M0 is the maximum continuous casting billet single weight, w1 is the weight of cutting off the head and the tail, w2 is the weight of safety margin, alpha is the rolling yield, and T1 is the weight of a single fixed-length steel plate without cutting edges. It should be noted that, in this embodiment, the maximum continuous casting billet basis weight M0 value taking method is to take a smaller value from the maximum designed billet weight M1 of the hot continuous rolling production line and the maximum overhead crane weight M2. M1 is the maximum billet weight allowed to be designed by the hot continuous rolling line according to the width of the finished steel plate. M2 is the maximum allowable blank weight of the crane in the continuous rolling line. Therefore, the blank weight maximization under the condition of meeting the production line requirement can be ensured.
Furthermore, the weight that must be cut off from the head and the tail indicates that, in the non-trimming state, the production process and the parts that must be cut off and do not meet the delivery standard of the contract are determined by each production line according to the actual situation. The safety margin weight is used for preventing the influence on the total length of the steel coil caused by the fluctuation of the hot rolling size precision, and is generally designed according to 0.05-0.1 time of the contract length, so that the problem of insufficient slab quantity after rolling can be avoided.
Step S30: and obtaining a large volume interval according to the upper limit of the contract delivery amount, the lower limit of the contract delivery amount and the maximum single volume fixed-size sheet number.
In step S30, the sub-steps are implemented as follows:
firstly, the weight of a single piece of fixed-length trimming steel plate can be obtained according to the contract thickness, the contract width, the contract fixed-length and the steel plate density; specifically, the acquisition mode of sola scale side cut steel sheet weight does:
t0＝h*w*l*ρboard
Wherein t0 is the weight of a single fixed-length steel plate without trimming, h is the contract thickness, w is the contract width, l is the contract fixed-length, and rhoBoardThe steel plate density.
Then, a contract cut-to-length number section is obtained from the upper limit of the delivery amount of the contract, the lower limit of the delivery amount of the contract, and the weight of the single-piece cut-to-length steel plate, the contract cut-to-length number section being composed of the lower limit of the contract cut-to-length number and the upper limit of the contract cut-to-length number. Specifically, the lower limit of the contract number of cut sheets is:
A1＝g1/T0
wherein A1 is the lower limit of the contract number of sized sheets, g1 is the lower limit of the delivery amount of the contract, and t0 is the weight of a single sized steel plate without edge cutting.
The upper limit of the contract number of cut sheets is:
A2＝g2/t0
wherein A2 is the lower limit of the contract number of fixed-length sheets, g2 is the upper limit of the delivery amount of the contract, and t0 is the weight of a single fixed-length steel plate without edge cutting. The contract number-to-length interval is [ A1, A2 ].
And finally, obtaining a large roll number interval according to the contract fixed-length sheet number interval and the maximum single-roll fixed-length sheet number. Specifically, the large winding number section is composed of a lower limit of the large winding number and an upper limit of the large winding number, and the lower limit of the large winding number can be obtained according to the following equation:
Q1＝A1/n1
where Q1 is the lower limit of the number of large rolls, A1 is the lower limit of the number of contract cut-to-length sheets, and n1 is the maximum number of single roll cut-to-length sheets.
The upper limit of the number of large rolls can be obtained according to the following equation:
Q2＝A2/n1
where Q2 is the upper limit of the number of large rolls, A2 is the lower limit of the number of contract cut-to-length sheets, and n1 is the maximum number of single roll cut-to-length sheets. The large coil number interval is [ Q1, Q2], and the final contract requirements can be met by rolling according to the coil number in the interval.
Step S40: and obtaining the whole roll number of the large roll and the non-whole roll number of the large roll according to the large roll number interval.
In step S40, the material lifting method can be divided into two ways, where the material is required to be just the number of whole large rolls. Specifically, if an integer exists in the interval of the number of large rolls, the condition that the material is just the number of the whole large rolls can be satisfied. The second situation is that after the material can form the maximum number of the whole large roll, a part of the material is not enough to form the large roll, and the minimum roll design or the secondary large roll design needs to be carried out on the rest part of the material. In contrast, in the large volume interval, the entire large volume is rounded down at the lower limit of the interval. And then subtracting the whole number of the large rolls from the lower limit of the number of the large rolls to obtain a decimal part, wherein the decimal part is the part of the number of the large rolls which is not the whole number of the large rolls. In the step, the material is extracted according to the two conditions of the number of the whole large-roll rolls and the number of the non-whole large-roll rolls, so that the extracted material can be effectively utilized, and the yield of the tail board is reduced.
Step S50: and obtaining the total amount of the material to be lifted according to the number of the whole large rolls and the number of the non-whole large rolls.
In step S50, if the material extraction is performed according to the above-mentioned condition of step S40, that is, the number of whole large rolls can be exactly rounded, and the number of non-whole large rolls can be exactly 0. At the moment, the total material lifting amount is the total weight of the maximum coil steel blank, and the specific material lifting amount obtaining steps are as follows:
first, the maximum coil weight is obtained based on the maximum number of single coil fixed-length sheets, the weight of a single fixed-length steel plate without trimming, the weight of the head and the tail which must be cut off, and the weight of a safety margin. That is, the maximum volume weight is obtained according to the following formula:
J1＝n1*t1+w1+w2
wherein J1 is the maximum coil weight, n1 is the maximum single coil fixed-size number, w1 is the weight of the end to end which needs to be cut off, w2 is the safety margin weight, and t1 is the weight of a single fixed-size uncut steel plate.
Then, obtaining the maximum coil steel billet single weight according to the maximum coil weight, the rolling yield and the ratio coefficient of the actual single weight of the steel billet to the theoretical single weight; the specific acquisition mode is as follows:
M3＝J1/α/β
wherein M3 is the maximum coil weight of the steel billet, J1 is the maximum coil weight, alpha is the rolling yield, and beta is the ratio coefficient of the actual single weight to the theoretical single weight of the steel billet.
And finally, obtaining the total weight of the maximum coil of the steel billet according to the single weight of the maximum coil of the steel billet and the number of the whole large coil. In this embodiment, if the number of whole large coils is N, the total weight of the maximum coil blank is:
Wbig (a)＝N*M3
Wherein, WBig (a)The total weight of the maximum rolled steel blank is the total weight of the extracted material; m3 is the maximum coil billet basis weight. Since the length, width, thickness, density, etc. of the billet are constant, the weight corresponding to each maximum volume of billet singles may be converted into a billet length, where the billet length Lt corresponding to each maximum volume of billet singles is:
Lt＝M3/K/ρblank/H/W
Wherein Lt is the maximum single length of the rolled steel billet, H is the design thickness of the steel billet, W is the design width of the steel billet, M3 is the maximum single weight of the rolled steel billet, K is the shape coefficient of the continuous casting billet, and rhoBlankThe density of the steel billet is 7.8 multiplied by 10 for common carbon steel3kg/m3。
If the number of large coils is the second case in step S40, that is, if the number of non-whole large coils is not zero, the total amount of material to be extracted should include the minimum single coil weight of steel blank, or the minimum single coil weight of steel blank and the redesigned single secondary large coil weight of steel blank, in addition to the total weight of the maximum steel blank. At this time, step S50 includes:
step S51: acquiring contract fixed-length sheets.
Step S52: and obtaining the minimum coil weight according to the contract cut-to-length number, the number of the whole large coil, the maximum single coil cut-to-length number, the weight of the single cut-to-length steel plate without trimming, the weight of the head and the tail which must be cut off and the safety margin weight.
In step S52, when the remaining remainder to be extracted is not enough to form the maximum coil after determining the number of the whole coils of the maximum coil, the minimum coil can be formed to ensure that the tail board is produced with low probability after rolling and the contract number of the full-length sheets is satisfied. The minimum volume weight is:
J2＝(ncombination of Chinese herbs-N*n1)*t1+w1+w2
Wherein J2 is the minimum coil weight, nCombination of Chinese herbsFor the number of contract fixed-length sheets, N1 is the maximum number of single-roll fixed-length sheets, w1 is the weight of the end-to-end cut-off, w2 is the safety margin weight, t1 is the weight of a single fixed-length steel plate without edge cutting, and N is the number of the whole set large-roll rolls.
Step S53: and obtaining the minimum coil weight of the steel billet according to the minimum coil weight, the rolling yield and the ratio coefficient of the actual singleweight of the steel billet to the theoretical singleweight.
In step S53, the minimum coil billet singlet weight may be:
M4＝J2/α/β
wherein M4 is the minimum coil weight of the billet, J2 is the minimum coil weight, alpha is the rolling yield, and beta is the ratio coefficient of the actual singleweight to the theoretical singleweight of the billet.
Step S54: and judging whether the single weight of the minimum coil of the steel billet is larger than the minimum weight of the steel billet allowed to enter the furnace.
Step S55: and if so, obtaining the total lifting amount according to the single weight of the minimum coil steel blank and the total weight of the maximum coil steel blank.
In steps S54-S55, when the minimum steel billet weight allowed to enter the furnace is satisfied by the minimum steel billet weight, the material lifting requirement can be satisfied by only designing the maximum number of non-whole coils as one minimum coil. The total material lifting amount is the sum of the total weight of the maximum rolled steel blank and the single weight of the minimum rolled steel blank. Likewise, the minimum coil billet singles may be converted to a minimum coil billet length Ls as follows:
Ls＝M4/K/ρblank/H/W
Wherein Ls is the minimum coil billet length, H is the billet design thickness, W is the billet design width, M4 is the minimum coil billet singleweight, K is the continuous casting billet shape coefficient, rhoBlankThe density of the steel billet is 7.8 multiplied by 10 for common carbon steel3kg/m3。
Step S56: if not, obtaining the total material lifting amount according to the single weight of the minimum coil of the steel billet, the total weight of the maximum coil of the steel billet and the minimum weight of the steel billet allowed to enter the furnace.
In step S56, when the single weight of the minimum coil billet does not satisfy the minimum billet weight allowed to enter the furnace, a secondary large coil needs to be additionally designed, so that the partial lifting amount of a maximum coil is allocated to the minimum coil to satisfy the minimum billet weight allowed to enter the furnace. At this time, the minimum single coil weight is calculated according to the minimum weight of the billet allowed to enter the furnace, that is, the minimum single coil weight is equal to the minimum weight of the billet allowed to enter the furnace. For convenience of explanation, in the present embodiment, the single weight of the minimum coil billet is M5, which is the minimum allowable billet weight.
Specifically, first, a target number of cut-to-length sheets can be obtained according to the minimum billet weight allowed to enter the furnace, that is:
n2＝(M5*α-w1-w2)/t1
wherein M5 is the minimum billet weight allowed to enter the furnace, n2 is the target number of the specified sheets, w1 is the weight of the head and the tail which must be cut off, w2 is the safety margin weight, and t1 is the weight of a single specified steel plate without cutting edges.
The length of the billet corresponding to M5 is:
Ls′＝M5/K/ρblank/H/W
Wherein Ls' is the length of the billet corresponding to M5, H is the design thickness of the billet, W is the design width of the billet, M5 is the minimum weight of the billet allowed to enter the furnace, K is the shape coefficient of the continuous casting billet, and rhoBlankThe density of the steel billet is 7.8 multiplied by 10 for common carbon steel3kg/m3。
Then, obtaining the secondary large coil weight according to the target fixed-length number, the contract fixed-length number, the whole large coil number, the maximum single coil fixed-length number, the weight of a single fixed-length steel plate without trimming, the head and tail weight which must be cut off and the safety margin weight; namely:
J3＝(n1-(n2-(ncombination of Chinese herbs-N*n1)))*t1+w1+w2
Wherein J3 is the secondary large coil weight, nCombination of Chinese herbsFor the number of contract cut-to-length sheets, N1 is the maximum number of single coil cut-to-length sheets, N2 is the target number of cut-to-length sheets, w1 is the head and tail cut-to-length weight, w2 is the safety margin weight, t1 is the weight of a single cut-to-length steel plate without cutting edges, and N is the number of set large coil and whole coil.
And then, obtaining the single weight of the secondary large coil steel blank according to the coil weight of the secondary large coil, the rolling yield and the ratio coefficient of the actual single weight of the steel blank to the theoretical single weight. In particular to a method for preparing a high-performance nano-silver alloy,
M6＝J3/α/β
wherein M6 is the single weight of the secondary large coil steel blank, J3 is the secondary large coil weight, alpha is the rolling yield, and beta is the ratio coefficient of the actual single weight to the theoretical single weight of the steel blank.
Correspondingly, the lengths of the steel billets corresponding to the secondary large coil steel billet are as follows:
Lc＝M6/K/ρblank/H/W
Wherein Lc is the length of the steel billet corresponding to the secondary large coil steel billet, H is the design thickness of the steel billet, W is the design width of the steel billet, M6 is the single weight of the secondary large coil steel billet, K is the shape coefficient of the continuous casting billet, and rhoBlankThe density of the steel billet is 7.8 multiplied by 10 for common carbon steel3kg/m3。
And finally, obtaining the total amount of the extracted materials according to the single weight of the secondary large coil steel blank, the single weight of the minimum coil steel blank and the total weight of the maximum coil steel blank. At the moment, because the secondary large coil is designed on the basis of the maximum coil, the maximum coil number in the total material extraction amount is N-1; therefore, the total material lifting amount is the sum of the maximum total weight of the rolled steel blank-the maximum single weight of the rolled steel blank, the minimum single weight of the rolled steel blank and the single weight of the secondary large rolled steel blank. The step S56 can ensure that the yield of the end plate is reduced, and simultaneously, the situation that the billet can not enter the furnace because the billet does not meet the minimum weight requirement when the excess stock is designed into the minimum coil can be avoided.
In conclusion, the total amount of the material is WGeneral assemblyExpressed, the total amount of material extracted in this example is as follows:
1. when the maximum roll can be rounded and meets the contract or order requirements, then WGeneral assembly＝WBig (a)，WBig (a)The maximum total weight of the rolled steel blank.
2. When the maximum coil can not be rounded, but the excess material can meet the minimum furnace entering requirement, WGeneral assembly＝WBig (a)+M4，WBig (a)The maximum total weight of the rolled steel blank and the M4 the minimum single weight of the rolled steel blank.
3. When the maximum coil can not be rounded and the excess material can not meet the minimum furnace entering requirement, WGeneral assembly＝WBig (a)-M3+M5+M6，WBig (a)The maximum total weight of the rolled steel blank, M3 the maximum single weight of the rolled steel blank, M4 the maximumThe single weight of the small coil steel blank, and M6 is the single weight of the second large coil steel blank.
When the total amount of the extracted materials is determined and then production is carried out, steel-making feeding production is carried out according to the size and the number of the steel billets (continuous casting billets), and the requirement on the cutting weight precision of the steel billets is controlled within the limit length of the short plate. And rolling according to a conventional hot rolling path to produce a steel coil, cooling, performing transverse cutting line slab-opening production, reasonably distributing the cut sizes of the head and the tail according to the weight (converted into length) of the head and the tail which must be cut during blank design, and performing transverse cutting according to the specified size and the length tolerance delta 4.
Through investigation, the yield of the end plate of a transversely-cut flat plate production line in main hot continuous rolling production enterprises in China is generally 2.5-4.0%, and the yield of the end plate is 1.0-1.6 ten thousand tons calculated according to an open flat plate production line producing 40 ten thousand tons every year, the price difference between a positive material and a judged material is 1000 yuan/ton on average, and the annual loss is as high as 1000-1600 yuan. The invention aims at the technical problem that the last steel plate often fails to meet the requirement of contract sizing and causes degradation judgment in the production of the hot rolled steel coil transverse cutting flat plate, and the designed material lifting method for producing the cutting flat plate can optimize a material lifting model according to the order/contract quantity and the size specification, and can accurately design the length of each coil of steel for cutting flat into integral multiple of the sizing plate except the part which needs to be cut off, thereby greatly reducing the yield of the tail plate which does not meet the contract sizing.
Furthermore, according to production inspection, the method can enable the calculated rolling length of the steel coil to be more than 98% compared with the actual rolling length after the material lifting model for flat plate production is opened, and the model accuracy is improved to more than 90% and the yield of the original variety is improved. And the short-length yield of the transversely-cut flat tail plate is reduced to below 1.40 percent, and the enterprise cost is reduced by over 500 ten thousand in one year.
Second embodiment
Referring to fig. 2, a second embodiment of the present invention provides a lifting device 300 for producing an open flat plate based on the same inventive concept. The production of division of flat board carries material device 300 includes:
the production data acquisition module 301 is used for acquiring the contract thickness, the contract width, the contract length, the product production parameters, the upper limit of the contract delivery quantity, the lower limit of the contract delivery quantity and the maximum continuous casting billet weight during production; a number obtaining module 302, configured to obtain a maximum single-coil fixed-length number according to the contract thickness, the contract width, the contract fixed-length, the maximum continuous casting billet weight, and the product production parameter; a first volume number obtaining module 303, configured to obtain a large volume number interval according to the upper limit of the contract delivery amount, the lower limit of the contract delivery amount, and the maximum single-volume fixed-size number; the second volume number obtaining module 304 is configured to obtain the whole volume number of the large volume and the non-whole volume number of the large volume according to the large volume number interval; and the material lifting amount obtaining module 305 is configured to obtain a total material lifting amount according to the number of whole large rolls and the number of non-whole large rolls.
As an alternative embodiment, the product production parameters include: actual thickness offset, planned increase width of the edge cutting steel plate, actual width offset, fixed length tolerance offset, steel plate density, rolling yield, head and tail cut-off weight and safety margin weight; the number obtaining module 302 is specifically configured to:
obtaining the weight of a single fixed-length steel plate without trimming according to the contract thickness, the actual thickness offset, the contract width, the planned increase width of the trimming steel plate, the actual width offset, the contract fixed-length, the fixed-length tolerance offset and the steel plate density; and obtaining the maximum single-coil fixed-length number according to the maximum continuous casting billet singleness, the rolling yield, the head and tail cut-off weight, the safety margin weight and the weight of the single fixed-length non-edge-cutting steel plate.
As an optional implementation manner, the first volume number obtaining module 303 is specifically configured to:
obtaining the weight of a single piece of fixed-length trimming steel plate according to the contract thickness, the contract width, the contract fixed-length and the steel plate density; obtaining a contract fixed-length sheet interval according to the contract delivery upper limit, the contract delivery lower limit and the weight of the single fixed-length trimming steel plate; and obtaining the large roll number interval according to the contract fixed-length sheet interval and the maximum single-roll fixed-length sheet.
As an optional embodiment, the product production parameters further include: the ratio coefficient of the actual singleness to the theoretical singleness of the steel billet; when the number of the large non-whole rolls is zero, the total material lifting amount is the total weight of the maximum rolled steel blank; the material lifting amount obtaining module 305 is specifically configured to:
obtaining the maximum coil weight according to the maximum single coil fixed-length number, the weight of the single fixed-length steel plate without trimming, the weight of the head and the tail which must be cut off and the safety margin weight; obtaining the maximum coil weight of the steel billet according to the maximum coil weight, the rolling yield and the ratio coefficient of the actual single weight of the steel billet to the theoretical single weight; and obtaining the total weight of the maximum rolled steel blank according to the single weight of the maximum rolled steel blank and the number of the whole large-roll rolls.
As an optional embodiment, the product production parameters further include: allowing entry into the furnace for a minimum billet weight; when the number of the large non-whole rolls is not zero, the material lifting amount obtaining module 305 is further specifically configured to:
acquiring contract fixed-length sheets; obtaining the minimum coil weight according to the contract cut-to-length number, the number of the whole large coil, the maximum single coil cut-to-length number, the weight of the single cut-to-length steel plate without trimming, the weight of the head and the tail which must be cut off and the safety margin weight; obtaining the minimum coil weight of the steel billet according to the minimum coil weight, the rolling yield and the ratio coefficient of the actual single weight of the steel billet to the theoretical single weight; judging whether the single weight of the minimum coil of steel billet is greater than the minimum weight of the steel billet allowed to enter the furnace; if so, obtaining the total material lifting amount according to the single weight of the minimum coil steel blank and the total weight of the maximum coil steel blank; if not, obtaining the total material lifting amount according to the single weight of the minimum coil of the steel billet, the total weight of the maximum coil of the steel billet and the minimum weight of the steel billet allowed to enter the furnace.
As an optional implementation manner, the material lifting amount obtaining module 305 is further specifically configured to include:
obtaining a target specified-size sheet number according to the weight of the minimum steel billet allowed to enter the furnace and the weight of a single specified-size steel plate without trimming; obtaining the weight of the secondary large coil according to the target number of the specified sizes, the number of the specified sizes of the contract, the number of the whole large coil, the maximum number of the specified sizes of the single coil, the weight of the single specified-size steel plate without trimming, the weight of the head and the tail which must be cut off and the weight of the safety margin; obtaining the single weight of the secondary large coil steel blank according to the coil weight of the secondary large coil, the rolling yield and the ratio coefficient of the actual single weight of the steel blank to the theoretical single weight; and obtaining the total material lifting amount according to the single weight of the secondary large coil steel blank, the single weight of the minimum coil steel blank and the total weight of the maximum coil steel blank.
It should be noted that, the embodiment of the present invention provides a lifting device 300 for producing an open flat plate, which is implemented and produces the same technical effects as the foregoing method embodiment, and for the sake of brief description, reference may be made to the corresponding contents in the foregoing method embodiment where no part of the embodiment of the device is mentioned.
Third embodiment
Based on the same inventive concept, the third embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, which when executed by a processor implements the steps of the method according to any one of the first embodiments described above.
It should be noted that, in the computer-readable storage medium provided by the embodiment of the present invention, the specific implementation and the generated technical effect of each step when the program is executed by the processor are the same as those of the foregoing method embodiment, and for the sake of brief description, for the sake of brevity, reference may be made to the corresponding content in the foregoing method embodiment for the non-mentioned point of the embodiment.
The term "and/or" appearing herein is merely one type of associative relationship that describes an associated object, meaning that three relationships may exist, e.g., a and/or B, may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship; the word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The usage of the words first, second and third, etcetera do not indicate any ordering. These words may be interpreted as names.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims (10)

1. A lifting method for producing an open flat plate is characterized by comprising the following steps:
acquiring contract thickness, contract width, contract length, product production parameters, upper limit of contract delivery quantity, lower limit of contract delivery quantity and maximum continuous casting billet weight during production;
obtaining the maximum single coil sizing number according to the contract thickness, the contract width, the contract sizing length, the maximum continuous casting billet weight and the product production parameters;
obtaining a large volume interval according to the contract delivery amount upper limit, the contract delivery amount lower limit and the maximum single volume fixed-size sheet number;
obtaining the whole roll number of the large roll and the non-whole roll number of the large roll according to the large roll number interval;
and obtaining the total amount of the material to be lifted according to the number of the whole large rolls and the number of the non-whole large rolls.
2. The method of claim 1, wherein the product production parameters comprise: actual thickness offset, planned increase width of the edge cutting steel plate, actual width offset, fixed length tolerance offset, steel plate density, rolling yield, head and tail cut-off weight and safety margin weight; the obtaining the maximum single coil fixed-length sheet number according to the contract thickness, the contract width, the contract fixed-length, the maximum continuous casting billet single weight and the product production parameters comprises:
obtaining the weight of a single fixed-length steel plate without trimming according to the contract thickness, the actual thickness offset, the contract width, the planned increase width of the trimming steel plate, the actual width offset, the contract fixed-length, the fixed-length tolerance offset and the steel plate density;
and obtaining the maximum single-coil fixed-length number according to the maximum continuous casting billet singleness, the rolling yield, the head and tail cut-off weight, the safety margin weight and the weight of the single fixed-length non-edge-cutting steel plate.
3. The method according to claim 2, wherein obtaining a large volume interval according to the upper contract delivery amount limit, the lower contract delivery amount limit, and the maximum number of cut-to-size sheets for single volume comprises:
obtaining the weight of a single piece of fixed-length trimming steel plate according to the contract thickness, the contract width, the contract fixed-length and the steel plate density;
obtaining a contract fixed-length sheet interval according to the contract delivery upper limit, the contract delivery lower limit and the weight of the single fixed-length trimming steel plate;
and obtaining the large roll number interval according to the contract fixed-length sheet interval and the maximum single-roll fixed-length sheet.
4. The method of claim 2, wherein the product production parameters further comprise: the ratio coefficient of the actual singleness to the theoretical singleness of the steel billet; when the number of the large non-whole rolls is zero, the total material lifting amount is the total weight of the maximum rolled steel blank; the obtaining of the total lifting amount according to the number of the whole large rolls and the number of the non-whole large rolls comprises the following steps:
obtaining the maximum coil weight according to the maximum single coil fixed-length number, the weight of the single fixed-length steel plate without trimming, the weight of the head and the tail which must be cut off and the safety margin weight;
obtaining the maximum coil weight of the steel billet according to the maximum coil weight, the rolling yield and the ratio coefficient of the actual single weight of the steel billet to the theoretical single weight;
and obtaining the total weight of the maximum rolled steel blank according to the single weight of the maximum rolled steel blank and the number of the whole large-roll rolls.
5. The method of claim 4, wherein the product production parameters further comprise: allowing entry into the furnace for a minimum billet weight; when the number of the large-volume non-whole rolls is not zero, obtaining the total lifting amount according to the number of the large-volume whole rolls and the number of the large-volume non-whole rolls, including:
acquiring contract fixed-length sheets;
obtaining the minimum coil weight according to the contract cut-to-length number, the number of the whole large coil, the maximum single coil cut-to-length number, the weight of the single cut-to-length steel plate without trimming, the weight of the head and the tail which must be cut off and the safety margin weight;
obtaining the minimum coil weight of the steel billet according to the minimum coil weight, the rolling yield and the ratio coefficient of the actual single weight of the steel billet to the theoretical single weight;
judging whether the single weight of the minimum coil of steel billet is greater than the minimum weight of the steel billet allowed to enter the furnace;
if so, obtaining the total material lifting amount according to the single weight of the minimum coil steel blank and the total weight of the maximum coil steel blank;
if not, obtaining the total material lifting amount according to the single weight of the minimum coil of the steel billet, the total weight of the maximum coil of the steel billet and the minimum weight of the steel billet allowed to enter the furnace.
6. The method of claim 5, wherein said obtaining said total amount of lading based on said minimum coil billet basis, said maximum coil billet total weight, and said minimum allowable entry billet weight comprises:
obtaining a target specified-size sheet number according to the weight of the minimum steel billet allowed to enter the furnace and the weight of a single specified-size steel plate without trimming;
obtaining the weight of the secondary large coil according to the target number of the specified sizes, the number of the specified sizes of the contract, the number of the whole large coil, the maximum number of the specified sizes of the single coil, the weight of the single specified-size steel plate without trimming, the weight of the head and the tail which must be cut off and the weight of the safety margin;
obtaining the single weight of the secondary large coil steel blank according to the coil weight of the secondary large coil, the rolling yield and the ratio coefficient of the actual single weight of the steel blank to the theoretical single weight;
and obtaining the total material lifting amount according to the single weight of the secondary large coil steel blank, the single weight of the minimum coil steel blank and the total weight of the maximum coil steel blank.
7. The utility model provides a production is opened dull and stereotyped and is carried material device which characterized in that includes:
the production data acquisition module is used for acquiring the contract thickness, the contract width, the contract length, the product production parameters, the upper limit of the contract delivery quantity, the lower limit of the contract delivery quantity and the maximum continuous casting billet weight during production;
the number obtaining module is used for obtaining the maximum single-coil fixed-size number according to the contract thickness, the contract width, the contract fixed-size length, the maximum continuous casting billet single weight and the product production parameters;
the first volume number obtaining module is used for obtaining a large volume number interval according to the contract delivery amount upper limit, the contract delivery amount lower limit and the maximum single volume fixed-size number;
the second volume number obtaining module is used for obtaining the whole volume number of the large volume and the non-whole volume number of the large volume according to the large volume number interval;
and the material lifting amount obtaining module is used for obtaining the total material lifting amount according to the number of the whole large-roll rolls and the number of the non-whole large-roll rolls.
8. The apparatus of claim 7, wherein the product production parameters comprise: actual thickness offset, planned increase width of the edge cutting steel plate, actual width offset, fixed length tolerance offset, steel plate density, rolling yield, head and tail cut-off weight and safety margin weight; the number obtaining module is specifically configured to:
obtaining the weight of a single fixed-length steel plate without trimming according to the contract thickness, the actual thickness offset, the contract width, the planned increase width of the trimming steel plate, the actual width offset, the contract fixed-length, the fixed-length tolerance offset and the steel plate density;
and obtaining the maximum single-coil fixed-length number according to the maximum continuous casting billet singleness, the rolling yield, the head and tail cut-off weight, the safety margin weight and the weight of the single fixed-length non-edge-cutting steel plate.
9. The apparatus of claim 8, wherein the first volume number obtaining module is specifically configured to:
obtaining the weight of a single piece of fixed-length trimming steel plate according to the contract thickness, the contract width, the contract fixed-length and the steel plate density;
obtaining a contract fixed-length sheet interval according to the contract delivery upper limit, the contract delivery lower limit and the weight of the single fixed-length trimming steel plate;
and obtaining the large roll number interval according to the contract fixed-length sheet interval and the maximum single-roll fixed-length sheet.
10. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 6.
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