CN116798200A - Multistage early warning method based on cold-rolled product counting and coiling rationality pre-judgment - Google Patents

Abstract

The invention discloses a multi-stage early warning method based on cold-rolled product counting and dividing coil rationality pre-judging, which automatically calculates the coil dividing number according to the upper limit and the lower limit of a target sub-coil of a cold-rolled product, judges whether qualified coil dividing can be performed according to a coil dividing unqualified risk coefficient, and establishes a coil dividing rationality pre-judging model. Before the production plan is executed, the model is applied to make the judgment of the rationality of the split rolls, and the split roll numbers based on different split roll strategies are given for the production plan capable of qualified split rolls; aiming at the production plan of unqualified coil separation, marking early warning is carried out on the system, so that a producer can take measures in advance, the problem that the coil separation cannot be reasonably carried out after the product is produced is avoided, and the generation of coil judgment due to unqualified weight and defect is reduced.

Description

Multistage early warning method based on cold-rolled product counting and coiling rationality pre-judgment

Technical Field

The invention belongs to the technical field of cold rolling, and particularly relates to a multistage early warning method based on cold rolling product counting and coiling rationality pre-judgment.

Background

The production process flow of the cold-rolled sheet is long, and the process flow from steelmaking blank to final finished product relates to hot rolling, pickling, cold rolling, continuous annealing/galvanization, rewinding and other procedures. The steel-making billets undergo a loss of yield as they go through each process, resulting in a continuous decrease in weight of the billets.

The method is limited by the conditions of deep processing equipment of users, the users of cold-rolled products generally have requirements on the weight of the received steel coil, and the upper limit and the lower limit of the weight of a single coil are usually set, so that the steel coil is ensured not to exceed equipment load in the processing process of the users, such as the maximum hoisting weight of a travelling crane, the maximum uncoiling weight of an uncoiler and the like.

The slitting operation of the cold rolling finished product process is a process of slitting one parent roll into a plurality of sub rolls according to the upper limit and the lower limit of the weight of a single roll of a user. In order to ensure that the weight of the produced steel coil meets the contract requirement after multiple cutting, different algorithm logics are adopted by each cold rolling process continuous production unit, and the most perfect weight cutting result is calculated.

One problem that usually occurs is that after a parent roll cuts out 1 to 2 sub-rolls that meet the upper and lower limits of the user's single roll weight, the last sub-roll cannot meet the requirements, i.e. the roll weight is not a logical coil. When the situation occurs, most units need to be temporarily changed into manual calculation and cutting, or the whole roll is directly produced without cutting, so that the production rhythm is seriously influenced, and unnecessary resource waste is increased. And the sub-rolls which do not meet the roll weight requirement can only be sealed for treatment and even are judged to be unqualified products.

The patent of the publication No. CN109909304B discloses a cold-rolled steel coil weight slitting algorithm with supplementary logic, and the invention uses the idea of average slitting to make the weight of each slit small coil the same as possible. And a pre-calculation method is adopted, a real-time dynamic calculation mode is abandoned, raw material production information data is fully utilized, and after the inlet steel coil is fed, the preliminary calculation of a slitting algorithm is completed. It can be ensured that the weight of each partial roll is approximately the same.

The pre-calculation method is to simulate the conventional split winding process, and the core is to calculate the average split winding weight corresponding to different split winding numbers from the split winding number 1 in an iterative mode and judge whether the average split winding weight is between the single upper limit and the single lower limit. After the pre-calculation method is applied to feeding the inlet steel coil, even if the splitting logic is found to be not suitable, a splitting mode is still needed to be selected for production, and the problem that the splitting result is inconsistent with the requirement of a user is necessarily caused. In addition, the solution given after the sub-rolls are not logically separated is to firstly cut the sub-rolls which meet the requirements as far as possible, and then the smallest sub-rolls are left to judge as unqualified products.

The invention adopts a split-coil rationality judgment logic completely different from the prior art, and provides a multi-stage early warning method based on the split-coil rationality prediction of a cold-rolled product.

Disclosure of Invention

The invention aims to provide a multistage early warning method based on the division and rolling rationality pre-judgment of a cold-rolled product.

The technical scheme adopted for solving the technical problems is as follows: a multi-stage early warning method based on cold-rolled product counting and dividing rationality pre-judging comprises a split winding rationality pre-judging model, wherein the split winding rationality pre-judging model comprises the following steps:

1) Acquiring order line basic information;

2) From the upper and lower singleton limits W1 and W2, the average singleton is calculated: wa= (w1+w2)/2; single range tolerance: wt= (W1-W2)/2;

3) According to the current process raw material roll weight W0 and the single upper limit W1, the least number of rolls is budgeted: c1 =round dup (w0×μ/W1, 0), the yield from the current process to the final product is noted μ; according to the current process raw material roll weight W0 and the single-weight lower limit W2, the least number of rolls is budgeted: c2 =round down (w0×μ/w2, 0); budget split median: c3 =round ((c1+c2)/2, 0), where the round function is round up and the round function is round down;

4) Dividing the rolls according to the number of the C1, C2 and C3 rolls, and budgeting unqualified roll dividing risk coefficients: f1 =abs (w0×μ/C1-Wa)/Wt; f2 =abs (w0×μ/C2-Wa)/Wt; f3 =abs (w0×μ/C3-Wa)/Wt, three sub-volume reject risk factors f1, f2, f3, at least one of f1, f2, f3 being smaller than a preset value f0, i.e. determining that a sub-volume is acceptable, the system is marked "OK", otherwise determining that a sub-volume is not acceptable, the system is marked "NG";

5) In the production and manufacturing execution system, embedding the split rationality pre-judging model in each process plan, if the raw material coil is judged to be unqualified in budget split, reminding in system early warning, closing and waiting, revising the upper limit and the lower limit of singleness until the qualified split condition is met, and then transferring the coil production plan to the next process to ensure that the on-line steel coil is qualified split.

Specifically, the specific steps in the step 5) are as follows:

1) In a production and manufacturing execution system, setting a split winding rationality prejudging result OK or NG for displaying a split winding rationality prejudging model in each blank production planning row in a hot rolling production plan;

2) In a production and manufacturing execution system, setting a split coil rationality pre-judging result OK or NG for displaying a split coil rationality pre-judging model in each coil raw material production planning row in an acid rolling production plan;

3) In a production and manufacturing execution system, setting a split winding rationality prejudging result OK or NG for displaying a split winding rationality prejudging model in each winding raw material production planning row in a continuous annealing production plan;

4) In a production and manufacturing execution system, setting a split winding rationality prejudging result OK or NG for displaying a split winding rationality prejudging model in each winding raw material production planning row in a hot galvanizing production plan;

5) When checking the production plan of the current working procedure before production of each working procedure, screening out a plan line marked as NG, sealing to be processed, resetting the upper limit and the lower limit of singleweight until qualified rolls can be separated and then transferred into a normal production program.

The invention has the following beneficial effects:

1) The rationality of the split rolls is quantitatively judged through the unqualified risk coefficient of the budget split rolls, the judgment speed is high, and the judgment is more accurate;

2) The split coil rationality of each coil is automatically judged by embedding the split coil rationality pre-judging model into a production planning system of each process of the whole production process of the cold-rolled product. Aiming at a production plan capable of qualified volume division, giving the volume division number based on different volume division strategies; aiming at the production plan that the coil cannot be qualified and separated, marking early warning is made on the system, so that the condition that the coil is on line under the condition that a reasonable cutting scheme is not available and the coil cannot be qualified and cut or the whole coil is produced is avoided, and resource waste is avoided;

3) The multi-stage early warning is realized before the steel coil is produced on line, enough response time is reserved for the producer and the user to negotiate and revise the upper limit and the lower limit of the single weight of the steel coil, conditions are created for the production and marketing research collaborative optimization production flow, and win-win of the user requirement and the production efficiency is obtained.

Drawings

FIG. 1 is a flow chart of a split volume rationality prediction model.

FIG. 2 is a multi-stage early warning workflow diagram.

Detailed Description

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

1-2, a multi-stage early warning method based on cold-rolled product counting and dividing rationality pre-judging is to pre-calculate sub-coil weight according to the sub-coil weight through reasonable sub-coil number of single upper limit and lower limit budget of a steel coil, introduce sub-coil unqualified risk coefficient and quantitatively judge the sub-coil rationality. Aiming at a production plan capable of qualified volume division, giving the volume division number based on different volume division strategies; and marking and early warning is carried out on the system aiming at the production plan of unqualified sub-rolls. After the pre-judging model is applied to continuous casting, hot rolling, acid rolling and continuous annealing/galvanization processes, the pre-judging model is pre-budgeted for the rationality of coil splitting in advance before the raw materials are delivered to the next production process, and multi-stage pre-warning is carried out, so that enough response time is reserved for negotiating and revising the single upper limit and the single lower limit of the steel coil for a producer and a user, and qualified coil splitting during on-line production is ensured.

And (5) a split-coil rationality pre-judging model:

1) From the upper and lower singleton limits W1 and W2, the average singleton is calculated: wa= (w1+w2)/2; single range tolerance: wt= (W1-W2)/2;

2) According to the current process raw material roll weight W0 and the single upper limit W1, the least number of rolls is budgeted: c1 =round dup (w0×μ/W1, 0); marking the yield of the finished product from the current working procedure as mu; according to the current process raw material roll weight W0 and the single-weight lower limit W2, the least number of rolls is budgeted: c2 =round down (w0×μ/w2, 0); budget split median: c3 =round ((c1+c2)/2, 0), where the function of the round function is rounded up and the function of the round function is rounded down;

3) Dividing the rolls according to the number of the C1, C2 and C3 rolls, and budgeting unqualified roll dividing risk coefficients: f1 =abs (w0×μ/C1-Wa)/Wt;

f2 =abs (w0×μ/C2-Wa)/Wt; f3 The risk coefficient of disqualification of the three sub-volumes of (W0 μ/C3-Wa)/Wt, f1, f2, f3, if one of the risk coefficients is smaller than a preset value f0, the sub-volume is judged to be qualified, and the system is marked as "OK"; otherwise, the system is marked as NG, and f0=90% is generally selected.

In a Manufacturing Execution System (MES), embedding the model into each process plan, if the raw coil is judged to be unqualified in budget coil separation, warning a producer in a system early warning mode, closing and waiting for the producer to negotiate with a customer with the aim of taking a coil separation unqualified risk coefficient smaller than f0, revising the upper limit and the lower limit of a single weight until the qualified coil separation condition is met, and then, transferring the coil production plan to the next process to ensure that the online steel coil can be qualified in coil separation. The method comprises the following specific steps:

1) A hot rolling production planning interface of a production Manufacturing Execution System (MES), wherein a field is arranged in each blank production planning row, and a split winding rationality prejudging result OK or NG estimated according to the split winding rationality prejudging model is displayed;

2) An acid rolling production planning interface of a production Manufacturing Execution System (MES), wherein a field is arranged in each roll raw material production planning line, and a division roll rationality prejudging result OK or NG estimated according to the division roll rationality prejudging model is displayed;

3) Setting a field in each roll raw material production planning line of a continuous annealing production planning interface of a production Manufacturing Execution System (MES), and displaying a roll rationality prejudging result OK or NG according to the roll rationality prejudging model budget;

4) A hot galvanizing production planning interface of a production Manufacturing Execution System (MES), wherein a field is arranged in each roll raw material production planning line, and a division winding rationality prejudging result OK or NG estimated according to the division winding rationality prejudging model is displayed;

when checking the production plan of the current process before production of each process, screening out a plan line marked as NG, sealing to be processed, and transferring to a business person to contact a user to negotiate a new single upper limit and a new single lower limit until qualified rolls can be separated and transferred into a normal production program.

The present invention is not limited to the above embodiments, and any person who can learn the structural changes made under the teaching of the present invention can fall within the scope of the present invention if the present invention has the same or similar technical solutions.

The technology, shape, and construction parts of the present invention, which are not described in detail, are known in the art.

Claims (2)

1. The multi-stage early warning method based on the division and the rationality pre-judgment of the cold-rolled product is characterized by comprising a division and rationality pre-judgment model, wherein the division and rationality pre-judgment model comprises the following steps:

1) Acquiring order line basic information;

2) From the upper and lower singleton limits W1 and W2, the average singleton is calculated: wa= (w1+w2)/2; single range tolerance: wt= (W1-W2)/2;

3) According to the current process raw material roll weight W0 and the single upper limit W1, the least number of rolls is budgeted: c1 =round dup (w0×μ/W1, 0), the yield from the current process to the final product is noted μ; according to the current process raw material roll weight W0 and the single-weight lower limit W2, the least number of rolls is budgeted: c2 =round down (w0×μ/w2, 0); budget split median: c3 =round ((c1+c2)/2, 0), where the round function is round up and the round function is round down;

4) Dividing the rolls according to the number of the C1, C2 and C3 rolls, and budgeting unqualified roll dividing risk coefficients: f1 =abs (w0×μ/C1-Wa)/Wt; f2 =abs (w0×μ/C2-Wa)/Wt; f3 =abs (w0×μ/C3-Wa)/Wt, three sub-volume reject risk factors f1, f2, f3, at least one of f1, f2, f3 being smaller than a preset value f0, i.e. determining that a sub-volume is acceptable, the system is marked "OK", otherwise determining that a sub-volume is not acceptable, the system is marked "NG";

5) In the production and manufacturing execution system, embedding the split rationality pre-judging model in each process plan, if the raw material coil is judged to be unqualified in budget split, reminding in system early warning, closing and waiting, revising the upper limit and the lower limit of singleness until the qualified split condition is met, and then transferring the coil production plan to the next process to ensure that the on-line steel coil is qualified split.

2. The multi-stage early warning method based on the division and rationality pre-judgment of cold rolled products according to claim 1, wherein the specific steps in the step 5) are as follows:

1) In a production and manufacturing execution system, setting a split winding rationality prejudging result OK or NG for displaying a split winding rationality prejudging model in each blank production planning row in a hot rolling production plan;

2) In a production and manufacturing execution system, setting a split coil rationality pre-judging result OK or NG for displaying a split coil rationality pre-judging model in each coil raw material production planning row in an acid rolling production plan;

3) In a production and manufacturing execution system, setting a split winding rationality prejudging result OK or NG for displaying a split winding rationality prejudging model in each winding raw material production planning row in a continuous annealing production plan;

4) In a production and manufacturing execution system, setting a split winding rationality prejudging result OK or NG for displaying a split winding rationality prejudging model in each winding raw material production planning row in a hot galvanizing production plan;

5) When checking the production plan of the current working procedure before production of each working procedure, screening out a plan line marked as NG, sealing to be processed, resetting the upper limit and the lower limit of singleweight until qualified rolls can be separated and then transferred into a normal production program.