Method and system for calculating set values of new gauge strip of cold rolling skin pass mill

Abstract

The application provides a cold-rolled skin pass mill new specification strip steel setting value calculation method and system, and comprises the following steps: identifying a new specification strip steel; traversing a strip steel setting value data area to calculate a plurality of new specification strip steel characteristic values; screening the plurality of new specification strip steel characteristic values according to the new specification strip steel characteristic values and a set screening coefficient; and taking the minimum value of the new specification strip steel characteristic values in the screened data as the final new specification strip steel characteristic value of the new specification strip steel. The application is aimed at the skin pass mill new specification product production, and the algorithm calculation can obtain more accurate skin pass mill new specification product production setting values, and has good self-adaptability, so that the production unit obtains more excellent product performance.

Description

Technical Field

[0001] This invention relates to the field of metallurgical automation, and more specifically, to a method and system for calculating the setpoints of new specification strip steel for cold rolling leveling machines. Background Technology

[0002] In traditional cold rolling mills, strip steel production parameters are typically obtained from a parameter setting table by the process control system and then sent to the basic automation system for production control. When the unit produces new products or strip steel of new specifications, since the production parameter table does not include the parameters for that specification, the process control system sends default settings to the basic automation system. Because these default settings cannot meet the production requirements of the new strip steel specifications, the quality of the new strip steel products cannot be guaranteed. Summary of the Invention

[0003] To address the shortcomings of existing technologies, the purpose of this invention is to provide a method and system for calculating the set values ​​of new specification strip steel for cold rolling leveling mills.

[0004] A method for calculating the setpoint of a new specification strip for a cold rolling leveling mill, provided by the present invention, includes:

[0005] Step S1: Confirm the identification marks of the strip steel based on the production data;

[0006] Step S2: Using the identification mark as an index, establish a strip steel set value data area;

[0007] Step S3: Obtain the current specifications of the strip steel;

[0008] Step S4: Based on the search results in the strip set value data area according to the current strip specifications, identify the new specification strip.

[0009] Step S5: Traverse the strip steel set value data area and calculate multiple new specification strip steel characteristic values;

[0010] Step S6: Based on the characteristic values ​​of the new specification strip steel and the set screening coefficient, screen multiple characteristic values ​​of the new specification strip steel;

[0011] Step S7: Take the smallest characteristic value of the new specification strip from the filtered data, and use it as the final characteristic value of the new specification strip.

[0012] Preferably, in step S1:

[0013] The strip steel identification marks include: strip steel grade code SGrade, strip steel thickness H, strip steel width W, target elongation L and yield strength Q; based on the identification marks, record the real-time production data of the unit, take the rolling force Rf and tension T production data M points under constant speed condition, production interval Len meters, and perform data smoothing;

[0014] In step S2:

[0015] Using the identification mark as an index, establish a strip steel setpoint data area; store the actual strip steel production data, such as rolling force Rf and tension T, into the corresponding production data entries in the strip steel setpoint data area;

[0016] For each specification, N recent production data entries are retained. The production performance data to be stored is processed as follows:

[0017] Iterate through the queue of N existing data entries corresponding to the performance values:

[0018]

[0019] In the formula, Vnew is the calculated data to be stored;

[0020] Vstore represents the collected performance value;

[0021] Vn represents the current data;

[0022] g is the gain coefficient;

[0023] n is the index of the currently traversed data;

[0024] N represents the total number of stored data entries.

[0025] Preferably, in step S3:

[0026] The specifications of the strip include: strip grade code SGrade, strip thickness H, strip width W, target elongation L, and yield strength Q;

[0027] In step S4:

[0028] Search for the strip grade code SGrade in the setting parameter table of the strip setting value data area; if no results are found, it is determined to be a new specification strip.

[0029] Preferably, in step S5:

[0030] Using the characteristic values ​​of strip thickness H, strip width W, target elongation L, and yield strength Q of the new specification strip, the characteristic value Di(H,W,L,Q) of the new specification strip is calculated by traversing the set value data area of ​​the strip:

[0031]

[0032] In the formula, Hn, Wn, Ln, and Qn are the strip thickness, strip width, target elongation, and yield strength stored in the set value data area obtained during the nth traversal, respectively.

[0033] Fh, Fw, Fl, and Fq are adjustment coefficients for strip thickness, strip width, target elongation, and yield strength, respectively.

[0034] Preferably, in step S6:

[0035] Set the screening coefficient S and calculate |Di–S|.

[0036] If |Di–S|>0, then record the actual performance value and the corresponding Di;

[0037] If |Di–S|≤0, then discard the actual value and proceed to the next cycle of calculation;

[0038] In step S7:

[0039] After the traversal is complete, the data dataset is sorted, and the value with the smallest Di is taken as the new specification strip steel setting value.

[0040] A new specification strip setting value calculation system for a cold rolling leveling mill, provided by the present invention, includes:

[0041] Module M1: Confirms the identification mark of the strip steel based on production data;

[0042] Module M2: Using the identification mark as an index, establish a strip steel set value data area;

[0043] Module M3: Retrieves the current strip steel specifications;

[0044] Module M4: Based on the search results in the strip set value data area for the current strip specifications, identify the new specification strip.

[0045] Module M5: Traverses the strip steel setpoint data area and calculates multiple new specification strip steel characteristic values;

[0046] Module M6: Filters multiple characteristic values ​​of new specification strip steel based on the characteristic values ​​of the new specification strip steel and the set filtering coefficient;

[0047] Module M7: Take the smallest characteristic value of the new specification strip from the filtered data, and use it as the final characteristic value of the new specification strip.

[0048] Preferably, in module M1:

[0049] The strip steel identification marks include: strip steel grade code SGrade, strip steel thickness H, strip steel width W, target elongation L and yield strength Q; based on the identification marks, record the real-time production data of the unit, take the rolling force Rf and tension T production data M points under constant speed condition, production interval Len meters, and perform data smoothing;

[0050] In module M2:

[0051] Using the identification mark as an index, establish a strip steel setpoint data area; store the actual strip steel production data, such as rolling force Rf and tension T, into the corresponding production data entries in the strip steel setpoint data area;

[0052] For each specification, N recent production data entries are retained. The production performance data to be stored is processed as follows:

[0053] Iterate through the queue of N existing data entries corresponding to the performance values:

[0054]

[0055] In the formula, Vnew is the calculated data to be stored;

[0056] Vstore represents the collected performance value;

[0057] Vn represents the current data;

[0058] g is the gain coefficient;

[0059] n is the index of the currently traversed data;

[0060] N represents the total number of stored data entries.

[0061] Preferably, in module M3:

[0062] The specifications of the strip include: strip grade code SGrade, strip thickness H, strip width W, target elongation L, and yield strength Q;

[0063] In module M4:

[0064] Search for the strip grade code SGrade in the setting parameter table of the strip setting value data area; if no results are found, it is determined to be a new specification strip.

[0065] Preferably, in module M5:

[0066] Using the characteristic values ​​of strip thickness H, strip width W, target elongation L, and yield strength Q of the new specification strip, the characteristic value Di(H,W,L,Q) of the new specification strip is calculated by traversing the set value data area of ​​the strip:

[0067]

[0068] In the formula, Hn, Wn, Ln, and Qn are the strip thickness, strip width, target elongation, and yield strength stored in the set value data area obtained during the nth traversal, respectively.

[0069] Fh, Fw, Fl, and Fq are adjustment coefficients for strip thickness, strip width, target elongation, and yield strength, respectively.

[0070] Preferably, in module M6:

[0071] Set the screening coefficient S and calculate |Di–S|.

[0072] If |Di–S|>0, then record the actual performance value and the corresponding Di;

[0073] If |Di–S|≤0, then discard the actual value and proceed to the next cycle of calculation;

[0074] In module M7:

[0075] After the traversal is complete, the data dataset is sorted, and the value with the smallest Di is taken as the new specification strip steel setting value.

[0076] Compared with the prior art, the present invention has the following beneficial effects:

[0077] This invention addresses the production of new specifications of leveling machines by using algorithmic calculations to obtain more accurate production settings for these new specifications, and it also exhibits good adaptability, thereby enabling the production unit to achieve superior product performance. Attached Figure Description

[0078] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0079] Figure 1 This is a schematic diagram of the tension control process when switching specifications of the cold rolling leveling machine according to the present invention. Detailed Implementation

[0080] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0081] The purpose of this invention is to provide a method and system for calculating the setting values ​​of new specification strip steel in a cold rolling mill, which can obtain more accurate setting parameters for new products through calculation.

[0082] The calculation method for the new specification strip setting value of the cold rolling leveling mill includes:

[0083] Step S1: Collect production data and, through data correlation mining, confirm the strip steel identification identifiers: strip steel grade code SGrade, strip steel thickness H, strip steel width W, target elongation L, and yield strength Q.

[0084] Based on the above identification, record the real-time production data of the unit, take the rolling force Rf and tension T production data points M under constant speed condition, and the production interval Len meters, and perform data smoothing processing.

[0085] Step S2: Using the identification mark confirmed in Step S1 as an index, establish a strip steel setpoint data area. Store the actual strip steel production data, such as rolling force Rf and tension T, into the corresponding production data entries in the setpoint data area.

[0086] To prevent overfitting, N recent production data points are retained for each specification. The production performance data to be stored needs to be processed as follows:

[0087] Traverse the N data queues that already exist for the corresponding entry of the actual performance value, as calculated by formula (1).

[0088]

[0089] In the formula, Vnew is the calculated data to be stored;

[0090] Vstore represents the collected performance value;

[0091] Vn represents the current data;

[0092] g is the gain coefficient;

[0093] n is the index of the currently traversed data;

[0094] N represents the total number of stored data entries.

[0095] Step S3: Obtain the setting request from basic automation and extract the data. Set the specification judgment threshold δ, and extract the key parameters of strip steel from the requested setting data: strip steel grade code SGrade, strip steel thickness H, strip steel width W, target elongation L, and yield strength Q.

[0096] Step S4: Identify the new specification strip steel for the unit. Search for the steel grade code SGrade in the parameter setting table. If no results are found, it is determined to be a new specification.

[0097] Step S5: Using the characteristic values ​​of the new specification strip steel—strip thickness H, strip width W, target elongation L, and yield strength Q—traverse the strip steel set value data area and calculate the characteristic value Di(H,W,L,Q) of the new specification strip steel as follows:

[0098]

[0099] In the formula, Hn, Wn, Ln, and Qn are the strip thickness, strip width, target elongation, and yield strength stored in the set value data area obtained during the nth traversal, respectively.

[0100] Fh, Fw, Fl, and Fq are adjustment coefficients for strip thickness, strip width, target elongation, and yield strength, respectively.

[0101] Step S6:

[0102] Set the screening coefficient S and calculate |Di–S|.

[0103] Step S61: If |Di–S|>0, then record the actual performance value and the corresponding Di.

[0104] Step S62: If |Di–S|≤0, then discard the actual value and proceed to the next cycle calculation.

[0105] Step S7: After the traversal ends, the record dataset is processed and sorted, and the value with the smallest Di is taken as the set value of the data.

[0106] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments:

[0107] In step S1:

[0108] The identification mark is used as an index to establish a strip steel setting data area. 100 points of Rf and T production data under constant speed condition are taken, with a production interval of 1 meter, and data smoothing is performed.

[0109] In step S2:

[0110] Taking rolling force as an example, assuming the total number of rolling force data points N=2, and the real-time collected rolling forces Vstore=3681kN, V1=3656kN, V2=3661kN, V2=3722kN, and taking g=0.5, then...

[0111] Vnew=3681+((0.5 / sin((π / 2)*(1 / 3))*(3656-3681))+(0.5 / sin((π / 2)*(2 / 3))*(3661-3681))) / 2+(0.5 / sin((π / 2)*(3 / 3))*(3722-3681))) / 3=3675.7kn In step S5:

[0112] Taking a request message for a strip steel with H = 0.6mm, W = 1200mm, L = 0.8%, and Q = 293MPa as an example, assuming the current iteration is to n, and the setpoint table has Hn = 0.56mm, Wn = 1205mm, Ln = 0.85%, and Qn = 290MPa, and we take Fh = 10000, Fw = 0.3, Fl = 10000, and Fq = 1.5, then...

[0113]

[0114] In step S7:

[0115] After the traversal is complete, the data dataset is processed and sorted, and the value with the smallest Di is taken as the set value for that data.

[0116] Assuming that there are three data points that satisfy the condition |Di–S|>0 after calculation, namely 7.87, 5.63, and 9.58, then the rolling force stored in the entry corresponding to 5.63 is the optimal setting rolling force for this new specification strip steel.

[0117] The present invention also provides a calculation system for the set value of new specification strip steel for cold rolling leveling mill. Those skilled in the art can implement the calculation system by executing the steps of the calculation method for the set value of new specification strip steel for cold rolling leveling mill. That is, the calculation method for the set value of new specification strip steel for cold rolling leveling mill can be understood as a preferred embodiment of the calculation system for the set value of new specification strip steel for cold rolling leveling mill.

[0118] Those skilled in the art will understand that, in addition to implementing the system, apparatus, and their modules provided by this invention in purely computer-readable program code, the same program can be implemented in the form of logic gates, switches, application-specific integrated circuits, programmable logic controllers, and embedded microcontrollers by logically programming the method steps. Therefore, the system, apparatus, and their modules provided by this invention can be considered a hardware component, and the modules included therein for implementing various programs can also be considered structures within the hardware component; alternatively, modules for implementing various functions can be considered both software programs implementing the method and structures within the hardware component.

[0119] Specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. A method for calculating the set values ​​of new specification strip steel for a cold rolling leveling mill, characterized in that, include: Step S1: Confirm the identification marks of the strip steel based on the production data; Step S2: Using the identification mark as an index, establish a strip steel set value data area; Step S3: Obtain the current specifications of the strip steel; Step S4: Based on the search results in the strip set value data area according to the current strip specifications, identify the new specification strip. Step S5: Traverse the strip steel set value data area and calculate multiple new specification strip steel characteristic values; Step S6: Based on the characteristic values ​​of the new specification strip steel and the set screening coefficient, screen multiple characteristic values ​​of the new specification strip steel; Step S7: Take the smallest characteristic value of the new specification strip steel from the filtered data, and use it as the final characteristic value of the new specification strip steel. In step S2: Using the identification mark as an index, establish a strip steel setpoint data area; store the actual strip steel production data, such as rolling force Rf and tension T, into the corresponding production data entries in the strip steel setpoint data area; For each specification, N recent production data entries are retained. The production performance data to be stored is processed as follows: Iterate through the queue of N existing data entries corresponding to the performance values: In the formula, Vnew is the calculated data to be stored; Vstore represents the collected performance value; Vn represents the current data; g is the gain coefficient; n is the index of the currently traversed data; N is the total number of stored data entries; In step S5: Using the characteristic values ​​of strip thickness H, strip width W, target elongation L, and yield strength Q of the new specification strip, the characteristic value Di(H,W,L,Q) of the new specification strip is calculated by traversing the set value data area of ​​the strip: In the formula, Hn, Wn, Ln, and Qn are the strip thickness, strip width, target elongation, and yield strength stored in the set value data area obtained during the nth traversal, respectively, and Fh, Fw, Fl, and Fq are the adjustment coefficients of strip thickness, strip width, target elongation, and yield strength, respectively. In step S6: Set the screening coefficient S, and calculate |Di – S|; If |Di – S|>0, then record the actual performance value and the corresponding Di; If |Di – S| ≤ 0, then discard the actual value and proceed to the next cycle calculation.

2. The method for calculating the set value of new specification strip steel for cold rolling leveling mill according to claim 1, characterized in that, In step S1: The strip steel identification marks include: strip steel grade code SGrade, strip steel thickness H, strip steel width W, target elongation L and yield strength Q; based on the identification marks, record the real-time production data of the unit, take the rolling force Rf and tension T production data M points under constant speed condition, and the production interval Len meters, and perform data smoothing.

3. The method for calculating the setting value of new specification strip steel for cold rolling leveling mill according to claim 2, characterized in that, In step S3: The specifications of the strip include: strip grade code SGrade, strip thickness H, strip width W, target elongation L, and yield strength Q; In step S4: Search for the strip grade code SGrade in the setting parameter table of the strip setting value data area; if no results are found, it is determined to be a new specification strip.

4. The method for calculating the setting value of new specification strip steel for cold rolling leveling mill according to claim 1, characterized in that, In step S7: After the traversal is complete, the data dataset is sorted, and the value with the smallest Di is taken as the new specification strip steel setting value.

5. A calculation system for setting values ​​of new specification strip steel for a cold rolling leveling mill, characterized in that, The method for calculating the set value of new specification strip steel for cold rolling leveling mills according to any one of claims 1 to 4 includes: Module M1: Confirms the identification mark of the strip steel based on production data; Module M2: Using the identification mark as an index, establish a strip steel set value data area; Module M3: Retrieves the current strip steel specifications; Module M4: Based on the search results in the strip set value data area for the current strip specifications, identify the new specification strip. Module M5: Traverses the strip steel setpoint data area and calculates multiple new specification strip steel characteristic values; Module M6: Filters multiple characteristic values ​​of new specification strip steel based on the characteristic values ​​of the new specification strip steel and the set filtering coefficient; Module M7: Take the smallest characteristic value of the new specification strip from the filtered data, and use it as the final characteristic value of the new specification strip.

6. The calculation system for the new specification strip setting value of the cold rolling leveling mill according to claim 5, characterized in that, In module M1: The strip steel identification marks include: strip steel grade code SGrade, strip steel thickness H, strip steel width W, target elongation L and yield strength Q; based on the identification marks, record the real-time production data of the unit, take the rolling force Rf and tension T production data points M under constant speed condition, production interval Len meters, and perform data smoothing; In module M2: Using the identification mark as an index, establish a strip steel setpoint data area; store the actual strip steel production data, such as rolling force Rf and tension T, into the corresponding production data entries in the strip steel setpoint data area; For each specification, N recent production data entries are retained. The production performance data to be stored is processed as follows: Iterate through the queue of N existing data entries corresponding to the performance values: In the formula, Vnew is the calculated data to be stored; Vstore represents the collected performance value; Vn represents the current data; g is the gain coefficient; n is the index of the currently traversed data; N represents the total number of stored data entries.

7. The calculation system for the new specification strip steel setting value of the cold rolling leveling mill according to claim 6, characterized in that, In module M3: The specifications of the strip include: strip grade code SGrade, strip thickness H, strip width W, target elongation L, and yield strength Q; In module M4: Search for the strip grade code SGrade in the setting parameter table of the strip setting value data area; if no results are found, it is determined to be a new specification strip.

8. The calculation system for the new specification strip steel setting value of the cold rolling leveling mill according to claim 7, characterized in that, In module M5: Using the characteristic values ​​of strip thickness H, strip width W, target elongation L, and yield strength Q of the new specification strip, the characteristic value Di(H,W,L,Q) of the new specification strip is calculated by traversing the set value data area of ​​the strip: In the formula, Hn, Wn, Ln, and Qn are the strip thickness, strip width, target elongation, and yield strength stored in the set value data area obtained during the nth traversal, respectively, and Fh, Fw, Fl, and Fq are the adjustment coefficients of strip thickness, strip width, target elongation, and yield strength, respectively.

9. The calculation system for the setpoint of new specification strip steel for cold rolling leveling mill according to claim 8, characterized in that, In module M6: Set the screening coefficient S, and calculate |Di – S|; If |Di – S|>0, then record the actual performance value and the corresponding Di; If |Di – S| ≤ 0, then discard the actual value and proceed to the next cycle calculation; In module M7: After the traversal is complete, the data dataset is sorted, and the value with the smallest Di is taken as the new specification strip steel setting value.

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