CN112699534A - Method and device for producing cold-rolled products - Google Patents
Method and device for producing cold-rolled products Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 466
- 238000004519 manufacturing process Methods 0.000 claims abstract description 254
- 238000005098 hot rolling Methods 0.000 claims description 42
- 238000009628 steelmaking Methods 0.000 claims description 32
- 238000005097 cold rolling Methods 0.000 claims description 29
- 229910000831 Steel Inorganic materials 0.000 claims description 15
- 239000010959 steel Substances 0.000 claims description 15
- 238000010079 rubber tapping Methods 0.000 claims description 13
- 238000012216 screening Methods 0.000 claims description 10
- 238000000137 annealing Methods 0.000 claims description 7
- 238000004088 simulation Methods 0.000 claims description 6
- 238000012545 processing Methods 0.000 claims description 4
- 238000005096 rolling process Methods 0.000 claims description 4
- 239000000047 product Substances 0.000 description 55
- 238000013461 design Methods 0.000 description 6
- 238000007619 statistical method Methods 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000005246 galvanizing Methods 0.000 description 2
- 238000005272 metallurgy Methods 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 230000011218 segmentation Effects 0.000 description 2
- 239000011701 zinc Substances 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- FFBHFFJDDLITSX-UHFFFAOYSA-N benzyl N-[2-hydroxy-4-(3-oxomorpholin-4-yl)phenyl]carbamate Chemical compound OC1=C(NC(=O)OCC2=CC=CC=C2)C=CC(=C1)N1CCOCC1=O FFBHFFJDDLITSX-UHFFFAOYSA-N 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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Abstract
The invention provides a method and a device for producing cold-rolled products, wherein reference process parameter intervals of each quality element are determined in advance according to a mechanical property model, and each reference process parameter interval at least comprises one, so that the window of the process parameter interval is thinned; because the mechanical property model is established based on historical production data, no matter which reference process interval the current value of the quality element falls in, the reference process interval of each quality element in the current process can be dynamically adjusted according to the reference process interval of each quality element in the previous process and the quality adjusting table when the current process is used for production aiming at the plate blank produced by the previous process of any current process, and a set of most suitable process parameters is ensured to be matched; the automatic dynamic adjustment method can avoid the condition of order removal production, reduce the production cost and ensure the product quality when adjusting the quality of the cold-rolled product.
Description
Technical Field
The invention relates to the technical field of metallurgy, in particular to a method and a device for producing cold-rolled products.
Background
The quality of the cold-rolled product is converted by product specification, user code, application code and metallurgy specification code, and the customer order requirement is converted into the quality control element of enterprise production. And simultaneously, factors such as production line equipment, capacity, inventory, process maturity and the like are considered, and the optimal process path of the cold-rolled product during production of steel making, hot rolling, acid pickling and cold rolling processes is determined.
However, in the actual production process, the cold-rolled product is directly affected by the processes of steel making, hot rolling and the like in the previous process, and in order to ensure the quality of the final product, some process parameter requirements are adjusted in the subsequent process to meet the quality of the cold-rolled product. Such as: taking a certain mark as an example, the bake hardening BH value varies greatly with the actual excess carbon C of the slab. The optimal range of the grade excess C is 12-15 ppm, but the probability that the excess C content can accurately fall in the range of 12-15 ppm in the actual smelting process is only about 40%, and if the excess C content does not meet the range of 12-15 ppm, the process parameters of the subsequent process are required to be adjusted.
However, when the adjustment is performed according to the conventional rigid mass adjustment method, only the process parameter window is further tightened or the off-line production is performed, which may cause the following problems: firstly, after the quality design scheme is completed, the materials exceeding the adjustment range in the quality design scheme can only be subjected to order removal production, and the subsequent procedures need to be manually matched to perform order removal production, so that not only is the labor wasted, but also the overall production cost is increased. Second, the process parameter window is tightened in the quality design scheme, but this results in a narrowing of the process parameter window, resulting in a large number of rejected products. In addition, in order to meet a process parameter window in the production process, the performance fluctuation of the product is large, and the stability is insufficient.
Disclosure of Invention
Aiming at the problems in the prior art, the embodiment of the invention provides a method and a device for producing a cold-rolled product, which are used for solving the technical problem that the product quality and the production cost cannot be ensured simultaneously when the product quality is adjusted during the production of the cold-rolled product in the prior art.
The present invention provides a method for producing a cold rolled product, the method comprising:
aiming at different types of steel grades, acquiring historical production data corresponding to each production process, and establishing a corresponding mechanical property analysis model based on the historical production data;
determining mass elements in each production procedure and reference process parameter intervals of the mass elements in each production procedure based on the mechanical property analysis model; the production process comprises the following steps: a steel making process, a hot rolling process and a cold rolling process; the reference process parameter interval at least comprises one, and each reference process parameter interval corresponds to an index number; the reference process parameter interval of each quality element in the current production procedure is adjusted and determined according to the reference process interval of each quality element in the previous production procedure of the current production procedure, and the current production procedure comprises the following steps: a hot rolling step and a cold rolling step;
generating a quality adjustment table according to the quality elements in each production procedure, the process parameter intervals corresponding to the quality elements and the index numbers corresponding to the reference process parameter intervals;
when the current process is used for producing the plate blank output by the previous production process of the current process, obtaining the current value of each quality element in the previous production process;
judging whether the process parameters of the quality elements in the current working procedure need to be adjusted or not based on the current values of the quality elements in the previous production working procedure and the quality adjustment table, and searching corresponding index numbers in the adjustment table based on the current values if the process parameters need to be adjusted;
determining a reference process parameter interval corresponding to each quality element in the current production procedure according to each index number;
and producing cold-rolled products based on the process parameters in each reference process parameter interval in the current production process.
Optionally, the determining the reference process parameter interval of each quality element in each production process includes:
for each mass element in each production procedure, dividing a current process parameter interval corresponding to each mass element in advance;
performing quality simulation analysis on each current process parameter interval by using the mechanical property analysis model to obtain the influence degree of each current process parameter interval on the target quality result of the cold-rolled product; the quality results include: yield strength;
and screening the current parameter process interval according to the influence degree of each current process parameter interval on the target quality result to obtain a reference process parameter interval of each quality element in each production procedure.
Optionally, the mass elements include: the steel-making components in the steel-making process, the tapping temperature, the finish rolling temperature and the coiling temperature in the hot rolling process, the annealing temperature in the cold rolling process, the furnace zone speed and the finishing elongation.
Optionally, the determining whether to adjust the process parameter of each quality element in the current process based on the current value of each quality element in the previous production process and the quality adjustment table includes:
traversing the quality adjustment table for a current value of any quality element;
judging whether a process parameter interval to which the current value of the quality element belongs exists in the quality adjustment table;
if the process parameter interval to which the current value of the quality element belongs exists, continuously judging whether the corresponding index number exists in the process parameter interval to which the current value of the quality element belongs;
and if the corresponding index number exists in the process parameter interval to which the current value of the quality element belongs, determining that the process parameter of each quality element in the current process needs to be adjusted.
The present invention also provides an apparatus for producing a cold rolled product, the apparatus comprising:
the device comprises an establishing unit, a processing unit and a processing unit, wherein the establishing unit is used for acquiring historical production data corresponding to each production process aiming at different types of steel, and establishing a corresponding mechanical property analysis model based on the historical production data;
the determining unit is used for determining the mass elements in each production procedure and the reference process parameter intervals of the mass elements in each production procedure based on the mechanical property analysis model; the production process comprises the following steps: a steel making process, a hot rolling process and a cold rolling process; the reference process parameter interval at least comprises one, and each reference process parameter interval corresponds to an index number; the reference process parameter interval of each quality element in the current production procedure is adjusted and determined according to the reference process interval of each quality element in the previous production procedure of the current production procedure, and the current production procedure comprises the following steps: a hot rolling step and a cold rolling step;
the generating unit is used for generating a quality adjusting table according to the quality elements in each production procedure, the process parameter intervals corresponding to the quality elements and the index numbers corresponding to the reference process parameter intervals;
an acquisition unit, configured to acquire a current value of each of the mass elements in a previous production process when a slab output from the previous production process of the current process is produced by using the current process;
the production unit is used for judging whether the process parameters of the quality elements in the current working procedure need to be adjusted or not based on the current values of the quality elements in the previous production working procedure and the quality adjustment table, and searching corresponding index numbers in the adjustment table based on the current values if the process parameters need to be adjusted; determining a reference process parameter interval corresponding to each quality element in the current production procedure according to each index number; and producing cold-rolled products based on the process parameters in each reference process parameter interval in the current production process.
Optionally, the determining unit is specifically configured to:
for each mass element in each production procedure, dividing a current process parameter interval corresponding to each mass element in advance;
performing quality simulation analysis on each current process parameter interval by using the mechanical property analysis model to obtain the influence degree of each current process parameter interval on the target quality result of the cold-rolled product; the quality results include: yield strength;
and screening the current parameter process interval according to the influence degree of each current process parameter interval on the target quality result to obtain a reference process parameter interval of each quality element in each production procedure.
Optionally, the mass elements include: the steel-making components in the steel-making process, the tapping temperature, the finish rolling temperature and the coiling temperature in the hot rolling process, the annealing temperature in the cold rolling process, the furnace zone speed and the finishing elongation.
Optionally, the production unit is specifically configured to:
traversing the quality adjustment table for a current value of any quality element;
judging whether a process parameter interval to which the current value of the quality element belongs exists in the quality adjustment table;
if the process parameter interval to which the current value of the quality element belongs exists, continuously judging whether the corresponding index number exists in the process parameter interval to which the current value of the quality element belongs;
and if the corresponding index number exists in the process parameter interval to which the current value of the quality element belongs, determining that the process parameter of each quality element in the current process needs to be adjusted.
The present invention provides a method for producing a cold rolled product, the method comprising: aiming at different types of steel grades, acquiring historical production data corresponding to each production process, and establishing a corresponding mechanical property analysis model based on the historical production data; determining mass elements in each production procedure and reference process parameter intervals of the mass elements in each production procedure based on the mechanical property analysis model; the production process comprises the following steps: a steel making process, a hot rolling process and a cold rolling process; the reference process parameter interval at least comprises one, and each reference process parameter interval corresponds to an index number; the reference process parameter interval of each quality element in the current production procedure is adjusted and determined according to the reference process interval of each quality element in the previous production procedure of the current production procedure, and the current production procedure comprises the following steps: a hot rolling step and a cold rolling step; generating a quality adjustment table according to the quality elements in each production procedure, the process parameter intervals corresponding to the quality elements and the index numbers corresponding to the reference process parameter intervals; when the current process is used for producing the plate blank output by the previous production process of the current process, obtaining the current value of each quality element in the previous production process; the current production process comprises: a hot rolling step and a cold rolling step; judging whether the process parameters of the quality elements in the current working procedure need to be adjusted or not based on the current values of the quality elements in the previous production working procedure and the quality adjustment table, and searching corresponding index numbers in the adjustment table based on the current values if the process parameters need to be adjusted; determining a reference process parameter interval corresponding to each quality element in the current production procedure according to each index number; producing cold-rolled products based on the process parameters in each reference process parameter interval in the current production process; in this way, reference process parameter intervals of each quality element are determined in advance according to the mechanical property model, and each reference process parameter interval at least comprises one reference process parameter interval, which is equivalent to the process parameter interval window is refined; because the mechanical property model is established based on historical production data, no matter which reference process interval the current value of the quality element falls in, the reference process interval of each quality element in the current process can be dynamically adjusted according to the reference process interval of each quality element in the previous process and the quality adjusting table when the current process is used for production aiming at the plate blank produced by the previous process of any current process, and a set of most suitable process parameters is ensured to be matched; the automatic dynamic adjustment method can avoid the condition of order removal production and reduce the production cost when adjusting the quality of the cold-rolled product, and can also avoid the overlarge fluctuation of the product performance and ensure the quality of the product.
Drawings
FIG. 1 is a schematic flow diagram of a method for producing a cold rolled product according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of an apparatus for producing a cold-rolled product according to an embodiment of the present invention;
fig. 3 is a schematic diagram illustrating comparison of product quality before and after adjustment of process parameters in a production process according to an embodiment of the present invention.
Detailed Description
The technical problem that the product quality and the production cost cannot be ensured simultaneously when the product quality is adjusted in the process of producing cold-rolled products in the prior art is solved. The invention provides a method and a device for producing cold-rolled products.
The technical solution of the present invention is further described in detail by the accompanying drawings and the specific embodiments.
Example one
The present embodiment provides a method for producing a cold rolled product, as shown in fig. 1, the method including:
s110, acquiring historical production data corresponding to each production process aiming at different types of steel grades, and establishing a corresponding mechanical property analysis model based on the historical production data;
for different types of steel, the required process flow and quality elements are different, so that different mechanical property analysis models need to be established for different types of steel.
Aiming at any type of steel, when a corresponding mechanical property analysis model is established, historical production data corresponding to each production process is obtained, and statistical analysis or DOE (design analysis) experiments are utilized to carry out statistical analysis on the historical production data so as to establish the corresponding mechanical property analysis model. Wherein, the production process comprises: a steel making process, a hot rolling process and a cold rolling process; the mechanical property analysis model can be: regression models, clustering models, segmentation models, response optimization models, and the like.
It is understood that, in order to ensure the accuracy of the mechanical property analysis model, before the mechanical property analysis model is established, the method further includes:
and screening the historical production data according to the historical quality result. Thus, only the production data corresponding to the better historical quality result can be reserved; and the production data corresponding to the unqualified historical quality results can be screened.
S111, determining mass elements in each production procedure and reference process parameter intervals of the mass elements in each production procedure based on the mechanical property analysis model;
after the mechanical property analysis model is established, the mass elements in each production process and the reference process parameter intervals of the mass elements in each production process are determined based on the mechanical property analysis model. Wherein, when the production process is a steelmaking process, the quality elements can comprise: steel-making components; when the production process is a hot rolling process, the mass elements may include: tapping temperature, finishing temperature, coiling temperature and the like; when the production process is a cold rolling process, the quality elements may include: annealing temperature, furnace zone speed, finishing elongation and the like; when the production process is a galvanizing process, the quality elements may include: the temperature of the zinc pot, the speed of the air knife and the like.
The problems of large product quality performance fluctuation and insufficient stability caused by meeting the window requirement of a process parameter interval in the production process are avoided. In the application, each quality original reference process parameter interval at least comprises one, and each reference process parameter interval corresponds to an index number. In this way, the respective index numbers ultimately form a collection of index numbers.
For example, in a steel making process, for example, the C mass element includes three reference process parameter intervals: the index numbers of the first interval, the second interval and the third interval are A1, A2 and A3; in the hot rolling procedure, the tapping temperature comprises two parameter process intervals which are respectively as follows: a fourth interval and a fifth interval; the index numbers corresponding to the intervals are B1 and B2; then a1, a2, A3, B1, B2 form a set of indices. The reference process interval corresponding to each quality element in each production procedure has a preset corresponding relationship, and a complete process flow is formed. Such as: a1 and B1 correspond, a2 and B2 correspond, and so on.
It should be noted that the reference process parameter interval of each quality element in the current production process is adjusted and determined according to the reference process interval of each quality element in the previous production process of the current production process, and the current production process includes: a hot rolling step and a cold rolling step.
As an alternative embodiment, determining the reference process parameter interval of each quality element in each production process includes:
for each quality element in each production procedure, dividing a current process parameter interval corresponding to each quality element in advance;
performing quality simulation analysis on each current process parameter interval by using a mechanical property analysis model to obtain the influence degree of each current process parameter interval on the target quality result of the cold-rolled product; the quality results include: yield strength;
and screening the current parameter process interval according to the influence degree of each current process parameter interval on the target quality result to obtain the reference process parameter interval of each quality element in each production procedure.
For example, if the element C in the steel-making process is the first interval and the tapping temperature in the hot rolling process is the fourth interval, the mechanical property analysis model is used to simulate the production process based on the first interval and the fourth interval, so as to obtain the current quality result; then comparing the current quality result with the target quality result, and if the difference between the current quality result and the target quality result is too large (for example, exceeds a threshold range), filtering out a first interval and a fourth interval; if the current quality result is not much different from the target quality result (for example, within a threshold range), the first interval and the fourth interval are reserved.
S112, generating a quality adjustment table according to the quality elements in each production process, the process parameter intervals corresponding to the quality elements and the index numbers corresponding to the reference process parameter intervals;
and after the quality elements in each production process, the process parameter intervals corresponding to the quality elements and the index numbers corresponding to the reference process parameter intervals are determined, generating a quality adjustment table according to the quality elements in each production process, the process parameter intervals corresponding to the quality elements and the index numbers corresponding to the reference process parameter intervals. The quality adjustment table includes the corresponding relationship among the quality elements in each production process, the process parameter intervals corresponding to each quality element, and the index numbers corresponding to each reference process parameter interval.
S113, when the slab output by the previous production process of the current process is produced by the current process, obtaining the current value of each quality element in the previous production process;
when the current process is used for producing the plate blank output by the previous production process of the current process, the current values of the quality elements in the previous production process are obtained.
For example, when a slab output from a steel making process is produced by a hot rolling process, it is necessary to obtain current values of elements such as C, Si, and Mn in the slab.
S114, judging whether the process parameters of the quality elements in the current working procedure need to be adjusted or not based on the current values of the quality elements in the previous production working procedure and the quality adjustment table, and searching corresponding index numbers in the adjustment table based on the current values if the process parameters need to be adjusted; determining a reference process parameter interval corresponding to each quality element in the current production procedure according to each index number;
after the current values of the quality elements in the previous production process are obtained, in order to ensure the product quality, if the current values do not fall within the preset process parameter range, the process parameters in the current production process need to be adjusted, so that the current values of the quality elements in the previous production process and a quality adjustment table are needed to judge whether the process parameters of the quality elements in the current process need to be adjusted.
As an optional implementation, the determining whether to adjust the process parameters of the current process based on the current values of the quality elements in the previous production process and the quality adjustment table includes:
traversing the quality adjustment table for the current value of any quality element;
judging whether a process parameter interval to which the current value of the quality element belongs exists in the quality adjustment table;
if the process parameter interval to which the current value of the quality element belongs exists, continuously judging whether the corresponding index number exists in the process parameter interval to which the current value of the quality element belongs;
and if the corresponding index number exists in the process parameter interval to which the current value of the quality element belongs, determining that the process parameter of each quality element in the current process needs to be adjusted.
For example, taking element C as an example, after steel making is finished, a current value of element C is obtained, and it is determined that the current value falls into the first interval, it is determined whether the first interval has a corresponding index number, and if it is determined that the first interval has a corresponding index number, it is determined that the process parameter of the hot rolling process needs to be adjusted, and then a reference process parameter interval of each mass element in the hot rolling process is determined based on the first interval and the mass adjustment table. Such as: if the index number corresponding to the element C is A1, the index number corresponding to the element A1 can be determined to be B1 based on the quality adjustment table, and the tapping temperature in the hot rolling process is the reference process parameter interval corresponding to the element B1.
And S115, producing a cold-rolled product based on the process parameters in each reference process parameter interval in the current production process.
In the current production process, after the reference process parameter intervals of the quality elements are determined, cold-rolled products are produced based on the process parameters in the reference process parameter intervals in the current production process.
Specifically, the process parameters in each reference process parameter interval in the current production process are issued to the secondary execution system to produce the cold-rolled product.
In this way, reference process parameter intervals of each quality element are determined in advance according to the mechanical property model, and each reference process parameter interval at least comprises one reference process parameter interval, which is equivalent to the process parameter interval window is refined; the mechanical property model is established based on historical production data; then, for the slab produced in the previous process of any current process, no matter which reference process interval the current value of the quality element falls in, when the current process is used for production, the reference process interval of each quality element in the current process can be dynamically adjusted according to the reference process interval of each quality element in the previous process and the quality adjustment table, so as to ensure that a set of most suitable process parameters is matched; the automatic dynamic adjustment method can avoid the condition of order removal production and reduce the production cost when adjusting the quality of the cold-rolled product; but also can ensure the product quality.
Based on the same inventive concept, the application also provides a device for producing cold-rolled products, which is detailed in embodiment II.
Example two
The present embodiment provides an apparatus for producing a cold rolled product, as shown in fig. 2, the apparatus including: the device comprises a building unit 21, a determining unit 22, a generating unit 23, an acquiring unit 24 and a producing unit 25; wherein the content of the first and second substances,
the establishing unit 21 is used for acquiring historical production data corresponding to each production process aiming at different types of steel, and establishing a corresponding mechanical property analysis model based on the historical production data;
a determining unit 22, configured to determine, based on the mechanical property analysis model, a mass element in each of the production processes and a reference process parameter interval of each of the mass elements in each of the production processes; the production process comprises the following steps: a steel making process, a hot rolling process and a cold rolling process; the reference process parameter interval at least comprises one, and each reference process parameter interval corresponds to an index number; the reference process parameter interval of each quality element in the current production procedure is adjusted and determined according to the reference process interval of each quality element in the previous production procedure of the current production procedure, and the current production procedure comprises the following steps: a hot rolling step and a cold rolling step;
a generating unit 23, configured to generate a quality adjustment table according to the quality elements in each production process, the process parameter intervals corresponding to each quality element, and the index numbers corresponding to each reference process parameter interval;
an obtaining unit 24, configured to obtain a current value of each of the mass elements in a previous production process when a slab output from the previous production process of the current process is produced by the current process; the current production process comprises: a hot rolling step and a cold rolling step;
a production unit 25, configured to determine whether to adjust a process parameter of the current process based on the current value of each quality element in the previous production process and the quality adjustment table, and if so, look up a corresponding index number in the adjustment table based on the current value; determining a reference process parameter interval corresponding to each quality element in the current production procedure according to each index number; and producing cold-rolled products based on the process parameters in each reference process parameter interval in the current production process.
Specifically, for different types of steel, the required process flow and quality elements are different, so that different mechanical property analysis models need to be established for different types of steel.
For any type of steel grade, when establishing a corresponding mechanical property analysis model, the establishing unit 21 is configured to: and acquiring historical production data corresponding to each production process, and performing statistical analysis on the historical production data by using statistical analysis or DOE (design analysis) experiments to establish a corresponding mechanical property analysis model. Wherein, the production process comprises: a steel making process, a hot rolling process and a cold rolling process; the mechanical property analysis model can be: regression models, clustering models, segmentation models, response optimization models, and the like.
It is understood that, in order to ensure the accuracy of the mechanical property analysis model, the apparatus further comprises: a screening unit 26, before establishing the mechanical property analysis model, the screening unit 26 is further configured to:
and screening the historical production data according to the historical quality result. Thus, only the production data corresponding to the better historical quality result can be reserved; and the production data corresponding to the unqualified historical quality results can be screened.
After the mechanical property analysis model is established, the determining unit 22 is configured to determine the mass elements in each production process and the reference process parameter intervals of the mass elements in each production process based on the mechanical property analysis model. Wherein, when the production process is a steelmaking process, the quality elements can comprise: steel-making components; when the production process is a hot rolling process, the mass elements may include: tapping temperature, finishing temperature, coiling temperature and the like; when the production process is a cold rolling process, the quality elements may include: annealing temperature, furnace zone speed, finishing elongation and the like; when the production process is a galvanizing process, the quality elements may include: the temperature of the zinc pot, the speed of the air knife and the like.
The problems of large product quality performance fluctuation and insufficient stability caused by meeting the window requirement of a process parameter interval in the production process are avoided. In the application, each quality original reference process parameter interval at least comprises one, and each reference process parameter interval corresponds to an index number. In this way, the respective index numbers ultimately form a collection of index numbers.
For example, in a steel making process, for example, the C mass element includes three reference process parameter intervals: the index numbers of the first interval, the second interval and the third interval are A1, A2 and A3; in the hot rolling procedure, the tapping temperature comprises two parameter process intervals which are respectively as follows: a fourth interval and a fifth interval; the index numbers corresponding to the intervals are B1 and B2; then a1, a2, A3, B1, B2 form a set of indices. The reference process interval corresponding to each quality element in each production procedure has a preset corresponding relationship, and a complete process flow is formed. Such as: a1 and B1 correspond, a2 and B2 correspond, and so on.
It should be noted that the reference process parameter interval of each quality element in the current production process is adjusted and determined according to the reference process interval of each quality element in the previous production process of the current production process, and the current production process includes: a hot rolling step and a cold rolling step.
As an alternative embodiment, the determining unit 22 is specifically configured to:
for each quality element in each production procedure, dividing a current process parameter interval corresponding to each quality element in advance;
performing quality simulation analysis on each current process parameter interval by using a mechanical property analysis model to obtain the influence degree of each current process parameter interval on the target quality result of the cold-rolled product; the quality results include: yield strength;
and screening the current parameter process interval according to the influence degree of each current process parameter interval on the target quality result to obtain the reference process parameter interval of each quality element in each production procedure.
For example, if the element C in the steel-making process is the first interval and the tapping temperature in the hot rolling process is the fourth interval, the mechanical property analysis model is used to simulate the production process based on the first interval and the fourth interval, so as to obtain the current quality result; then comparing the current quality result with the target quality result, and if the difference between the current quality result and the target quality result is too large (for example, exceeds a threshold range), filtering out a first interval and a fourth interval; if the current quality result is not much different from the target quality result (for example, within a threshold range), the first interval and the fourth interval are reserved.
After the quality elements in each production process, the process parameter intervals corresponding to the quality elements, and the index numbers corresponding to the reference process parameter intervals are determined, the generation unit 23 is configured to generate the quality adjustment table according to the quality elements in each production process, the process parameter intervals corresponding to the quality elements, and the index numbers corresponding to the reference process parameter intervals. The quality adjustment table includes the corresponding relationship among the quality elements in each production process, the process parameter intervals corresponding to each quality element, and the index numbers corresponding to each reference process parameter interval.
The obtaining unit 24 is configured to obtain current values of the quality elements in the previous production process when the slab output from the previous production process of the current process is produced by the current process.
For example, when a slab output from a steel making process is produced by a hot rolling process, it is necessary to obtain current values of elements such as C, Si, and Mn in the slab.
After the current values of the quality elements in the previous production process are obtained, in order to ensure the product quality, if the current values do not fall within the preset process parameter range, the process parameters in the current production process need to be adjusted, so that the production unit 25 needs the current values of the quality elements in the previous production process and the quality adjustment table to determine whether the process parameters in the current process need to be adjusted.
As an alternative implementation, the production unit 25 is specifically configured to:
traversing the quality adjustment table for the current value of any quality element;
judging whether a process parameter interval to which the current value of the quality element belongs exists in the quality adjustment table;
if the process parameter interval to which the current value of the quality element belongs exists, continuously judging whether the corresponding index number exists in the process parameter interval to which the current value of the quality element belongs;
and if the corresponding index number exists in the process parameter interval to which the current value of the quality element belongs, determining the process parameter of the current process needing to be adjusted.
For example, after the steel making is finished, the current value of the element C is obtained, and if the current value falls into the first interval, it is determined whether the first interval has a corresponding index number, and if it is determined that the first interval has a corresponding index number, it is determined that the process parameter of the hot rolling process needs to be adjusted, and then the reference process parameter interval of each quality element in the hot rolling process is determined based on the first interval and the quality adjustment table. Such as: if the index number corresponding to the element C is A1, the index number corresponding to the element A1 can be determined to be B1 based on the quality adjustment table, and the tapping temperature in the hot rolling process is the reference process parameter interval corresponding to the element B1.
After the reference process parameter intervals of the quality elements are determined in the current production process, the production unit 25 is further configured to produce the cold-rolled product based on the process parameters in the reference process parameter intervals in the current production process.
Specifically, the process parameters in each reference process parameter interval in the current production process are issued to a secondary execution system to produce the cold-rolled product.
In this way, reference process parameter intervals of each quality element are determined in advance according to the mechanical property model, and each reference process parameter interval at least comprises one reference process parameter interval, which is equivalent to the process parameter interval window is refined; because the mechanical property model is established based on historical production data, no matter which reference process interval the current value of the quality element falls in, the reference process interval of each quality element in the current process can be dynamically adjusted according to the reference process interval of each quality element in the previous process and the quality adjusting table when the current process is used for production aiming at the plate blank produced by the previous process of any current process, and a set of most suitable process parameters is ensured to be matched; the automatic dynamic adjustment method can avoid the condition of order removal production and reduce the production cost when adjusting the quality of the cold-rolled product; but also can ensure the product quality.
The method and the device for producing the cold-rolled product provided by the application have the following beneficial effects that:
the present application provides a method and apparatus for producing cold rolled products, the method comprising: aiming at different types of steel grades, acquiring historical production data corresponding to each production process, and establishing a corresponding mechanical property analysis model based on the historical production data; determining mass elements in each production procedure and reference process parameter intervals of the mass elements in each production procedure based on the mechanical property analysis model; the production process comprises the following steps: a steel making process, a hot rolling process and a cold rolling process; the reference process parameter interval at least comprises one, and each reference process parameter interval corresponds to an index number; the reference process parameter interval of each quality element in the current production procedure is adjusted and determined according to the reference process interval of each quality element in the previous production procedure of the current production procedure, and the current production procedure comprises the following steps: a hot rolling step and a cold rolling step; generating a quality adjustment table according to the quality elements in each production procedure, the process parameter intervals corresponding to the quality elements and the index numbers corresponding to the reference process parameter intervals; when the current process is used for producing the plate blank output by the previous production process of the current process, obtaining the current value of each quality element in the previous production process; the current production process comprises: a hot rolling step and a cold rolling step; judging whether the process parameters of the current process need to be adjusted or not based on the current value of each mass element in the previous production process and the quality adjustment table, and searching a corresponding index number in the adjustment table based on the current value if the process parameters need to be adjusted; determining a reference process parameter interval corresponding to each quality element in the current production procedure according to each index number; producing cold-rolled products based on the process parameters in each reference process parameter interval in the current production process; in this way, reference process parameter intervals of each quality element are determined in advance according to the mechanical property model, and each reference process parameter interval at least comprises one reference process parameter interval, which is equivalent to the process parameter interval window is refined; because the mechanical property model is established based on historical production data, no matter which reference process interval the current value of the quality element falls in, the reference process interval of each quality element in the current process can be dynamically adjusted according to the reference process interval of each quality element in the previous process and the quality adjusting table when the current process is used for production aiming at the plate blank produced by the previous process of any current process, and a set of most suitable process parameters is ensured to be matched; the automatic dynamic adjustment method can avoid the condition of order removal production and reduce the production cost when adjusting the quality of the cold-rolled product; but also can ensure the product quality.
EXAMPLE III
In practical application, when BH steel is produced by using the method and apparatus provided in the first and second embodiments, the parameters of the respective quality elements corresponding to the original design requirements, 3 process flows before adjustment, and 4 process flows after adjustment are shown in table 1:
TABLE 1
It can be understood that each process flow includes process parameter intervals of all quality elements in all production procedures; taking the pre-adjustment process 1 as an example, the range of the excess C in the steel-making process is 9-11 ppm, the tapping temperature in the hot rolling is 1220 ℃, and the coiling temperature is 740 ℃; the annealing temperature in the cold rolling process was 765 c, and the resulting BH value was 23.
As can be seen from fig. 3, the fluctuation range of the BH value obtained from the adjusted process parameters is significantly smaller than that obtained from the process parameters before adjustment, which means that the method for producing cold-rolled products provided by the present application is feasible and effective.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, and any modifications, equivalents, improvements, etc. that are within the spirit and principle of the present invention should be included in the present invention.
Claims (8)
1. A method for producing a cold rolled product, characterized in that the method comprises:
aiming at different types of steel grades, acquiring historical production data corresponding to each production process, and establishing a corresponding mechanical property analysis model based on the historical production data;
determining mass elements in each production procedure and reference process parameter intervals of the mass elements in each production procedure based on the mechanical property analysis model; the production process comprises the following steps: a steel making process, a hot rolling process and a cold rolling process; the reference process parameter interval at least comprises one, and each reference process parameter interval corresponds to an index number; the reference process parameter interval of each quality element in the current production procedure is adjusted and determined according to the reference process interval of each quality element in the previous production procedure of the current production procedure, and the current production procedure comprises the following steps: a hot rolling step and a cold rolling step;
generating a quality adjustment table according to the quality elements in each production procedure, the process parameter intervals corresponding to the quality elements and the index numbers corresponding to the reference process parameter intervals;
when the current process is used for producing the plate blank output by the previous production process of the current process, obtaining the current value of each quality element in the previous production process;
judging whether the process parameters of the quality elements in the current working procedure need to be adjusted or not based on the current values of the quality elements in the previous production working procedure and the quality adjustment table, and searching corresponding index numbers in the adjustment table based on the current values if the process parameters need to be adjusted;
determining a reference process parameter interval corresponding to each quality element in the current production procedure according to each index number;
and producing cold-rolled products based on the process parameters in each reference process parameter interval in the current production process.
2. The method of claim 1, wherein said determining a reference process parameter interval for each of said mass elements in each production run comprises:
for each mass element in each production procedure, dividing a current process parameter interval corresponding to each mass element in advance;
performing quality simulation analysis on each current process parameter interval by using the mechanical property analysis model to obtain the influence degree of each current process parameter interval on the target quality result of the cold-rolled product; the quality results include: yield strength;
and screening the current parameter process interval according to the influence degree of each current process parameter interval on the target quality result to obtain a reference process parameter interval of each quality element in each production procedure.
3. The method of claim 1, wherein the quality element comprises: the steel-making components in the steel-making process, the tapping temperature, the finish rolling temperature and the coiling temperature in the hot rolling process, the annealing temperature in the cold rolling process, the furnace zone speed and the finishing elongation.
4. The method of claim 1, wherein the determining whether the process parameters of each quality element in the current process need to be adjusted based on the current value of each quality element in the previous production process and the quality adjustment table comprises:
traversing the quality adjustment table for a current value of any quality element;
judging whether a process parameter interval to which the current value of the quality element belongs exists in the quality adjustment table;
if the process parameter interval to which the current value of the quality element belongs exists, continuously judging whether the corresponding index number exists in the process parameter interval to which the current value of the quality element belongs;
and if the corresponding index number exists in the process parameter interval to which the current value of the quality element belongs, determining that the process parameter of each quality element in the current process needs to be adjusted.
5. An apparatus for producing cold rolled products, characterized in that it comprises:
the device comprises an establishing unit, a processing unit and a processing unit, wherein the establishing unit is used for acquiring historical production data corresponding to each production process aiming at different types of steel, and establishing a corresponding mechanical property analysis model based on the historical production data;
the determining unit is used for determining the mass elements in each production procedure and the reference process parameter intervals of the mass elements in each production procedure based on the mechanical property analysis model; the production process comprises the following steps: a steel making process, a hot rolling process and a cold rolling process; the reference process parameter interval at least comprises one, and each reference process parameter interval corresponds to an index number; the reference process parameter interval of each quality element in the current production procedure is adjusted and determined according to the reference process interval of each quality element in the previous production procedure of the current production procedure, and the current production procedure comprises the following steps: a hot rolling step and a cold rolling step;
the generating unit is used for generating a quality adjusting table according to the quality elements in each production procedure, the process parameter intervals corresponding to the quality elements and the index numbers corresponding to the reference process parameter intervals;
an acquisition unit, configured to acquire a current value of each of the mass elements in a previous production process when a slab output from the previous production process of the current process is produced by using the current process;
the production unit is used for judging whether the process parameters of the quality elements in the current working procedure need to be adjusted or not based on the current values of the quality elements in the previous production working procedure and the quality adjustment table, and searching corresponding index numbers in the adjustment table based on the current values if the process parameters need to be adjusted; determining a reference process parameter interval corresponding to each quality element in the current production procedure according to each index number; and producing cold-rolled products based on the process parameters in each reference process parameter interval in the current production process.
6. The apparatus of claim 5, wherein the determination unit is specifically configured to:
for each mass element in each production procedure, dividing a current process parameter interval corresponding to each mass element in advance;
performing quality simulation analysis on each current process parameter interval by using the mechanical property analysis model to obtain the influence degree of each current process parameter interval on the target quality result of the cold-rolled product; the quality results include: yield strength;
and screening the current parameter process interval according to the influence degree of each current process parameter interval on the target quality result to obtain a reference process parameter interval of each quality element in each production procedure.
7. The apparatus of claim 5, wherein the quality element comprises: the steel-making components in the steel-making process, the tapping temperature, the finish rolling temperature and the coiling temperature in the hot rolling process, the annealing temperature in the cold rolling process, the furnace zone speed and the finishing elongation.
8. The device according to claim 5, wherein the production unit is in particular adapted to:
traversing the quality adjustment table for a current value of any quality element;
judging whether a process parameter interval to which the current value of the quality element belongs exists in the quality adjustment table;
if the process parameter interval to which the current value of the quality element belongs exists, continuously judging whether the corresponding index number exists in the process parameter interval to which the current value of the quality element belongs;
and if the corresponding index number exists in the process parameter interval to which the current value of the quality element belongs, determining that the process parameter of each quality element in the current process needs to be adjusted.
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