A cold rolling mill intermediate roll profile design method, device, equipment and medium

Abstract

The present invention relates to the technical field of roll type design, and discloses a roll type design method, device, equipment and medium for an intermediate roll of a cold rolling mill. The method comprises: obtaining a plurality of historical strip width data, and sorting them from small to large, dividing the historical strip width data into a plurality of intervals, and determining the roll type design standard of each interval; determining the roll type design standard of a target intermediate roll according to the interval to which the target strip width belongs, and performing roll type calculation to obtain a plurality of design parameter values ​​of the target intermediate roll; performing numerical simulation on the roll type of the target intermediate roll according to the design parameter value to obtain the strip edge drop value of the target intermediate roll; if the strip edge drop value is greater than a preset edge drop threshold, returning to the step of interval division, increasing the number of intervals and re-designing the roll type until the strip edge drop value is not greater than the preset edge drop threshold. The present invention can eliminate harmful contact between the intermediate roll and the working roll at the edge of the strip, improve the edge drop of non-oriented silicon steel, and improve the transverse thickness precision control capability of the cold rolling mill.

Description

Technical Field

[0001] The invention relates to the technical field of roll profile design, and in particular to a roll profile design method, device, equipment and medium for an intermediate roll of a cold rolling mill. Background Art

[0002] As end users have higher and higher requirements for motor quality, cold-rolled non-oriented silicon steel, as the main material for making stator and rotor cores of transformers, motors, generators and other equipment, has extremely high requirements for transverse thickness tolerance accuracy and uniformity. During the rolling process, there will be harmful contact between the intermediate roll and the working roll at the edge of the strip, which will cause the edge drop of the strip to be too large. If the edge drop of non-oriented silicon steel is too large, the motor stacking coefficient and the overall performance will be unqualified. The existing cold rolling unit has insufficient edge drop control capability, and the edge drop of the strip is large, which cannot meet the user's requirements for motor quality. Summary of the invention

[0003] In view of this, the present invention provides a method, device, equipment and medium for designing the intermediate roll profile of a cold rolling mill to solve the problem of excessive edge drop of the strip caused by insufficient edge drop control capability of the existing cold rolling unit.

[0004] In a first aspect, the present invention provides a method for designing a roll profile of an intermediate roll of a cold rolling mill, the method comprising:

[0005] Acquire multiple historical strip steel width data, sort the historical strip steel width data from small to large, and determine the maximum and minimum values ​​of the historical strip steel width data;

[0006] According to the maximum and minimum values ​​of the historical strip width data, the historical strip width data is divided into multiple intervals, and the roller design standard of each interval is determined;

[0007] According to the interval to which the target strip width belongs, a roll profile design standard of the target intermediate roll is determined, and a roll profile calculation is performed according to the roll profile design standard of the target intermediate roll to obtain multiple design parameter values ​​of the target intermediate roll;

[0008] According to multiple design parameter values ​​of the target intermediate roll, the roll profile of the target intermediate roll is numerically simulated to obtain the strip edge drop value of the target intermediate roll;

[0009] If the strip edge drop value of the target intermediate roller is greater than the preset edge drop threshold, return to the step of dividing the historical strip width data into multiple intervals, increase the number of intervals, and redesign the roller shape until the strip edge drop value of the target intermediate roller is no greater than the preset edge drop threshold.

[0010] The cold rolling mill intermediate roll profile design method provided by the present invention sets multiple design standards according to historical strip width data, and calculates the roll profile according to the design standards corresponding to the target strip width. The optimal design roll profile is selected through simulation verification, which can eliminate harmful contact between the intermediate roll and the working roll at the edge of the strip, improve the edge drop of non-oriented silicon steel, and improve the transverse thickness accuracy control capability of the cold rolling mill.

[0011] In an optional embodiment, the method further includes:

[0012] Determine the coarse adjustment of the roll shifting amount according to the interval to which the target strip width belongs;

[0013] Obtain the flatness value of the target steel strip, and compare the flatness value of the target steel strip with the preset target flatness value to determine the amount of fine adjustment of the roll shifting;

[0014] The target intermediate roller is controlled to shift the roller according to the coarse adjustment roller shifting amount and the fine adjustment roller shifting amount.

[0015] The cold rolling mill intermediate roll profile design method provided by the present invention determines the coarse adjustment roll shifting amount and the fine adjustment roll shifting amount according to the requirements of the incoming material width and plate shape control, thereby realizing automatic online roll shifting and meeting the mill edge drop control requirements.

[0016] In an optional implementation, the historical strip width data is divided into a plurality of intervals according to the maximum and minimum values ​​of the historical strip width data, and the roll profile design standard of each interval is determined, including:

[0017] Obtain the total output corresponding to multiple historical strip width data, and determine the interval output threshold according to the total output;

[0018] Determine the range of each interval based on the interval production threshold;

[0019] According to the range of each interval and the maximum and minimum values ​​of the historical strip width data, the historical strip width data is divided into multiple intervals, and the range of each interval is within the range of the range;

[0020] The middle value of each interval is used as the roller design standard for the corresponding interval.

[0021] The roll profile design method for the intermediate roll of a cold rolling mill provided by the present invention determines the output threshold of each interval according to the total output, and then determines the range of the extreme value of each interval. The interval division is more in line with the actual production situation, which improves the roll profile design efficiency. The middle value of each interval is used as the roll profile design standard of the corresponding interval, which improves the roll profile design accuracy.

[0022] In an optional embodiment, the design parameter values ​​include: standard strip width, flat roll section length, chamfer section length, chamfer section depth and chamfer extension section depth;

[0023] According to the range to which the target strip width belongs, the roll profile design standard of the target intermediate roll is determined, and the roll profile is calculated according to the roll profile design standard of the target intermediate roll to obtain multiple design parameter values ​​of the target intermediate roll, including:

[0024] Determine the middle value of the interval according to the interval to which the target strip steel width belongs, and use the middle value of the interval as the standard strip steel width;

[0025] Obtain the roll length, and calculate the flat roll section length, chamfer section length, chamfer section depth, and chamfer extension section depth based on the standard strip width and roll length.

[0026] The cold rolling mill intermediate roll profile design method provided by the present invention calculates the flat roll section length, chamfer section length, chamfer section depth, and chamfer extension section depth according to the standard strip width. The values ​​of these parameters are relatively large, easy to calculate, and the values ​​are accurate. The specific roll profile of the intermediate roll can be obtained through these parameters, and the entire intermediate roll is divided into three sections with different roll profiles, allowing different contact methods to be adopted in different incoming material states to adapt to different material properties and rolling requirements.

[0027] In an optional embodiment, the target intermediate roller includes an upper intermediate roller and a lower intermediate roller, and the upper intermediate roller and the lower intermediate roller are anti-symmetric structures;

[0028] Calculate the flat roll section length, chamfer section length, chamfer section depth and chamfer extension section depth based on the standard strip width and roll length, including:

[0029] With the center of the roll as the origin and the X-axis as the axis of the roll, a rectangular coordinate system is established. The roll shape calculation formula of the upper intermediate roll is:

[0030]

[0031]

[0032]

[0033] in, Indicates the coordinates of the connection point between the flat roller segment and the chamfered segment, Indicates the coordinates of the connection point between the chamfer section and the chamfer extension section. Indicates the coordinates of the end point of the chamfer extension section, R indicates the radius of the chamfer section, Indicates the length of the chamfer section;

[0034] According to the coordinates of the connection points between the flat roll section and the chamfered section, the length of the flat roll section is determined as: , according to the coordinates of the connection point between the chamfer section and the chamfer extension section, the depth of the chamfer section is determined as: , according to the coordinates of the end point of the chamfer extension section, the depth of the chamfer extension section is determined as: .

[0035] The cold rolling mill intermediate roll profile design method provided by the present invention determines the coordinates of each key point by establishing a coordinate system, and then determines the design parameter value of the intermediate roll. The roll profile calculation method is simple, more parameter data are determined, and the accuracy of the roll profile design is guaranteed.

[0036] In an optional embodiment, the chamfered section is an arc roller type, the chamfered extension section is a straight roller type, and the chamfered extension section is tangent to the chamfered section at a connection point.

[0037] In an optional embodiment,

[0038]

[0039] in, Indicates standard strip width, Indicates the length of the roller.

[0040] The present invention provides a method for designing the profile of an intermediate roll of a cold rolling mill, wherein the chamfering section adopts an arc roll profile, and the chamfering starting section is located inside the strip steel. The arc section can smoothly connect the flat roll section and the chamfering extension section, thereby reducing stress concentration, avoiding tension and breakage of the strip steel plate in the chamfering section, and improving the service life of the intermediate roll profile.

[0041] In a second aspect, the present invention provides a device for designing the profile of an intermediate roll of a cold rolling mill, the device comprising:

[0042] A historical data acquisition module is used to acquire multiple historical strip steel width data, sort the historical strip steel width data from small to large, and determine the maximum and minimum values ​​of the historical strip steel width data;

[0043] An interval division module is used to divide the historical strip width data into multiple intervals according to the maximum and minimum values ​​of the historical strip width data, and determine the roller design standard for each interval;

[0044] A roll shape calculation module is used to determine the roll shape design standard of the target intermediate roll according to the interval to which the target strip width belongs, and to perform roll shape calculation according to the roll shape design standard of the target intermediate roll to obtain multiple design parameter values ​​of the target intermediate roll;

[0045] A numerical simulation module is used to perform numerical simulation on the roll profile of the target intermediate roll according to multiple design parameter values ​​of the target intermediate roll to obtain the strip edge drop value of the target intermediate roll;

[0046] The design update module is used to return to the step of dividing the historical strip width data into multiple intervals, increase the number of intervals, and redesign the roller shape if the strip edge drop value of the target intermediate roller is greater than the preset edge drop threshold, until the strip edge drop value of the target intermediate roller is no greater than the preset edge drop threshold.

[0047] In a third aspect, the present invention provides a computer device, comprising: a memory and a processor, the memory and the processor being communicatively connected to each other, the memory storing computer instructions, and the processor executing the method of the first aspect or any corresponding embodiment thereof by executing the computer instructions.

[0048] In a fourth aspect, the present invention provides a computer-readable storage medium having computer instructions stored thereon, the computer instructions being used to cause a computer to execute the method of the first aspect or any corresponding embodiment thereof. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0050] Figure 1 is a schematic flow chart of a method for designing a roll profile of an intermediate roll of a cold rolling mill according to an embodiment of the present invention;

[0051] Figure 2 is a structural schematic diagram of a six-high rolling mill in a method for designing a roll profile of an intermediate roll of a cold rolling mill according to an embodiment of the present invention;

[0052] Figure 3 is a schematic flow chart of another method for designing a roll profile of an intermediate roll of a cold rolling mill according to an embodiment of the present invention;

[0053] Figure 4 is a coordinate schematic diagram of the calculation of the roll profile of the upper intermediate roll in the roll profile design method of the cold rolling mill according to an embodiment of the present invention;

[0054] Figure 5 is a structural block diagram of a device for designing a roll profile of an intermediate roll of a cold rolling mill according to an embodiment of the present invention;

[0055] Figure 6 It is a schematic diagram of the hardware structure of a computer device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0056] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0057] An embodiment of the present invention provides a method for designing the profile of an intermediate roll of a cold rolling mill, which eliminates harmful contact between the intermediate roll and the working roll at the edge of the strip and improves the edge drop of non-oriented silicon steel through roll profile design, calculation, and simulation verification of the intermediate roll.

[0058] According to an embodiment of the present invention, an embodiment of a method for designing a roll profile of an intermediate roll of a cold rolling mill is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0059] In this embodiment, a method for designing the profile of an intermediate roll of a cold rolling mill is provided, which can be used in the above-mentioned computer system. Figure 1 : is a flow chart of a method for designing a roll profile of an intermediate roll of a cold rolling mill according to an embodiment of the present invention. Figure 1 As shown, the process includes the following steps:

[0060] Step S101, obtaining a plurality of historical steel strip width data, and sorting the historical steel strip width data from small to large, and determining the maximum value and the minimum value of the historical steel strip width data.

[0061] Specifically, the cold rolling mill in this embodiment is a six-roller cold rolling mill. Figure 2 The figure shows the structure diagram of the position between the rollers of the six-roller cold rolling mill. With the cold-rolled strip as the central axis, the upper working roll, lower working roll, upper intermediate roll, lower intermediate roll, upper support roll, and lower support roll are symmetrically distributed above and below. The left side is the operating side, and the right side is the transmission side. During production, the strip is driven from the inside to the outside by the two working rolls between the upper working roll and the lower working roll. For each cold rolling mill, when designing the roll type of its intermediate roll, it is necessary to collect the cold-rolled strip width data of the plant where the cold rolling mill is located for at least one year, and arrange the cold-rolled strip width data of at least one year in ascending order from small to large to determine the maximum and minimum values ​​of the historical strip width data. This is equivalent to determining the width range of the cold-rolled strip that needs to be produced in the plant where the cold rolling mill is located within one year. Based on this, the roll type of the intermediate roll of the cold rolling mill can be designed to ensure that the cold rolling mill meets the production needs of most cold-rolled strips.

[0062] Step S102, dividing the historical strip steel width data into a plurality of intervals according to the maximum and minimum values ​​of the historical strip steel width data, and determining the roller design standard for each interval.

[0063] Specifically, the historical strip width data is divided into multiple intervals according to the maximum and minimum values ​​of the historical strip width data. For example, if the maximum value of the historical strip width data is y and the minimum value is a, the multiple intervals divided include: the first interval [a, b), the second interval [b, c), the third interval [c, d) ... the nth interval [x, y), where y>x> ...>d>c>b>a, which is only used as an example but not limited to this. The roller design standard is determined according to the two end values ​​of each interval. The roller design standard is the width of the cold-rolled strip produced by the cold rolling mill. The roller design standard of each interval is the average value of the corresponding interval end value (the middle value of the corresponding interval). For example, the roller design standard of the first interval is .

[0064] Step S103, determining the roll profile design standard of the target intermediate roll according to the interval to which the target strip width belongs, and performing roll profile calculation according to the roll profile design standard of the target intermediate roll to obtain multiple design parameter values ​​of the target intermediate roll.

[0065] Specifically, the target strip width is the incoming material width. According to the interval to which the incoming material width belongs, the roll design standard of the target intermediate roll is determined. For example, if the incoming material width is between [a, b), the roll design standard of the target intermediate roll is ,Will The roll profile is calculated as the strip width to obtain a plurality of design parameter values ​​of the target intermediate roll, and the complete roll profile of the target intermediate roll can be obtained based on the plurality of design parameter values.

[0066] Step S104, performing numerical simulation on the roll profile of the target intermediate roll according to multiple design parameter values ​​of the target intermediate roll, and obtaining the strip edge drop value of the target intermediate roll.

[0067] Specifically, a numerical simulation platform is used to perform numerical simulation on the roller profile according to multiple design parameter values ​​of the target intermediate roller to obtain the strip edge drop value of the target intermediate roller under the design parameter values. The specific numerical simulation process is a mature existing technology and will not be repeated here.

[0068] Step S105, if the strip edge drop value of the target intermediate roller is greater than the preset edge drop threshold, return to the step of dividing the historical strip width data into multiple intervals, increase the number of intervals, and redesign the roller shape until the strip edge drop value of the target intermediate roller is no greater than the preset edge drop threshold.

[0069] Specifically, if the strip edge drop value of the target intermediate roller obtained by numerical simulation is greater than the preset edge drop threshold, it means that the edge drop is too large and does not meet the production requirements, and the interval needs to be re-divided. Return to the step of dividing the historical strip width data into multiple intervals, increase the number of divided intervals, for example, divide the historical strip width data into n+1 intervals, re-design the roll shape, obtain the updated design parameter value of the target intermediate roller, use the updated design parameter value to perform numerical simulation, update the strip edge drop value of the target intermediate roller, until the strip edge drop value of the target intermediate roller is not greater than the preset edge drop threshold, and use the last updated design parameter value to design the intermediate roller shape. The preset edge drop threshold can be 7μm, for example only, but not limited to this.

[0070] The cold rolling mill intermediate roll profile design method provided in this embodiment sets multiple design standards according to historical strip width data, and calculates the roll profile according to the design standards corresponding to the target strip width. The optimal design roll profile is selected through simulation verification, which can eliminate harmful contact between the intermediate roll and the working roll at the edge of the strip, improve the edge drop of non-oriented silicon steel, and improve the transverse thickness accuracy control capability of the cold rolling mill.

[0071] In some optional embodiments, the method further comprises:

[0072] Step a1, determining the coarse adjustment of the roller shifting amount according to the interval to which the target strip width belongs.

[0073] Specifically, the roll shifting in the six-roll cold rolling mill is to ensure the strip shape at the inlet and outlet, and is generally performed through the intermediate rolls. The intermediate roll shifting includes a coarse roll shifting module and a fine roll shifting module. The coarse roll shifting module can determine the interval according to the incoming material width, and then determine the coarse roll shifting amount. The coarse roll shifting amount is expressed by the formula: in, Indicates the width of the incoming material. It indicates the middle value of the range to which the incoming material width belongs, that is, the roller design standard for the range to which the incoming material width belongs.

[0074] Step a2, obtaining the flatness value of the target steel strip, and comparing the flatness value of the target steel strip with the preset target flatness value to determine the fine adjustment of the roller shifting amount.

[0075] Specifically, for the fine-tuning roller shifting module, the fine-tuning roller shifting amount is mainly determined based on the relationship between the incoming material plate shape value and the preset target plate shape value. Specifically, when the incoming material plate shape value is not greater than the preset target plate shape value, the automatic plate shape control model recognizes that fine-tuning of the intermediate roller is not performed; when the incoming material plate shape value is greater than the preset target plate shape value, the automatic plate shape control model recognizes that fine-tuning of the intermediate roller is performed. The fine-tuning roller shifting amount and roller shifting direction are automatically calculated by the online automatic plate shape control model to achieve automatic micro-shifting of the intermediate roller.

[0076] The size of the plate shape value reflects the flatness of the plate. The smaller the plate shape value, the more uniform the thickness distribution of the plate and the higher the flatness; conversely, the larger the plate shape value, the more uneven the thickness distribution of the plate and the lower the flatness.

[0077] Step a3, controlling the target intermediate roller to shift the roller according to the coarse adjustment roller shifting amount and the fine adjustment roller shifting amount.

[0078] Specifically, the coarse adjustment roller shifting amount and the fine adjustment roller shifting amount are in the same roller shifting direction. When the coarse adjustment roller shifting amount is a positive value, it means that the upper intermediate roller shifts from the transmission side to the operating side, and the lower intermediate roller shifts from the operating side to the transmission side; when the coarse adjustment roller shifting amount is a negative value, the upper intermediate roller shifts from the operating side to the transmission side, and the lower intermediate roller shifts from the transmission side to the operating side.

[0079] The cold rolling mill intermediate roll profile design method provided in this embodiment determines the coarse adjustment roll shifting amount and the fine adjustment roll shifting amount according to the requirements of the incoming material width and plate shape control, thereby realizing automatic online roll shifting and meeting the mill edge drop control requirements.

[0080] In this embodiment, a method for designing the profile of an intermediate roll of a cold rolling mill is provided, which can be used in the above-mentioned computer system. Figure 3 : is a flow chart of a method for designing a roll profile of an intermediate roll of a cold rolling mill according to an embodiment of the present invention. Figure 3 As shown, the process includes the following steps:

[0081] Step S201, obtain multiple historical strip width data, and sort the historical strip width data from small to large to determine the maximum and minimum values ​​of the historical strip width data. Figure 1 Step S101 of the illustrated embodiment will not be described in detail here.

[0082] Step S202, dividing the historical strip steel width data into a plurality of intervals according to the maximum and minimum values ​​of the historical strip steel width data, and determining the roller design standard for each interval.

[0083] Specifically, the above step S202 includes:

[0084] Step S2021, obtain the total output corresponding to multiple historical strip width data, and determine the interval output threshold based on the total output.

[0085] Specifically, when the intervals are divided for the first time, the interval production threshold needs to be determined based on the total output of cold-rolled strip products produced in the plant where the cold rolling mill is located in the past year. The difference in the output of each interval does not exceed 25% of the total output. This is only an example, but not limited to this. If the difference in the output of each interval is too large, the interval output is relatively high, and the width of the strip in this interval may vary greatly, and all strip widths cannot be covered by a set of roller types.

[0086] Step S2022, determine the range of each interval based on the interval production threshold.

[0087] Specifically, according to the interval division requirement that the difference in output of each interval does not exceed 25% of the total output, the range of each interval is determined to be 20~200mm, which is only used as an example, but not limited to this. For example, the width and output of the strip produced by the factory where the cold rolling mill is located in the past year are: 1020mm is 300,000 tons, 1080mm is 200,000 tons, 1150mm is 100,000 tons, and 1250mm is 400,000 tons, then the following intervals can be divided: [1020, 1050), [1050, 1200), [1200, 1250], the output in the interval [1020, 1050) is 300,000 tons, and the range is 30mm; the output in the interval [1050, 1200) is 300,000 tons, and the range is 150mm. It can be seen from this that if the output of strip steel products in a certain width range is high, it means that the factory mainly produces strip steel products within this range, and the range of this range is set smaller, and more sets of roll types can be designed; if the output of strip steel products in a certain width range is low, the range of this range is set larger. On the one hand, it ensures that the designed roll type can cover all width ranges of strip steel products, and on the other hand, it reduces the number of spare rolls and the cost of spare rolls.

[0088] Step S2023, dividing the historical strip steel width data into multiple intervals according to the range of each interval, the maximum value and the minimum value of the historical strip steel width data, and the range of each interval is within the range of the range.

[0089] Specifically, according to the range of each interval and the maximum and minimum values ​​of the historical strip width data, the historical strip width data are divided into multiple intervals to ensure that the range of each interval is within the range. For the divided intervals: the first interval [a, b), the second interval [b, c), the third interval [c, d)...the nth interval [x, y), among which, y>x>...>d>c>b>a, it is necessary to satisfy that yx,...,dc,cb,ba are all within the range of range.

[0090] Step S2024: taking the middle value of each interval as the roller shape design standard of the corresponding interval.

[0091] Specifically, calculate the average of the two end values ​​of each interval and determine the middle value of each interval, D mid1 , D mid2 , D mid3 ,……,D midn , as the design standard for the intermediate rolls in each section. The intermediate roll design is based on the middle width of the strip in the section to determine the length of the flat roll section, chamfer section and chamfer extension section.

[0092] The cold rolling mill intermediate roll profile design method provided in this embodiment determines the output threshold of each interval according to the total output, and then determines the range of the extreme value of each interval. The interval division is more in line with the actual production situation, which improves the roll profile design efficiency. The middle value of each interval is used as the roll profile design standard of the corresponding interval, which improves the roll profile design accuracy.

[0093] Step S203, determining the roll profile design standard of the target intermediate roll according to the interval to which the target strip width belongs, and performing roll profile calculation according to the roll profile design standard of the target intermediate roll to obtain multiple design parameter values ​​of the target intermediate roll.

[0094] Specifically, the design parameter values ​​include: standard strip width, flat roll section length, chamfer section length, chamfer section depth and chamfer extension section depth. The above step S203 includes:

[0095] Step S2031, determining the middle value of the interval according to the interval to which the target strip width belongs, and taking the middle value of the interval as the standard strip width.

[0096] Specifically, the target strip width is the incoming material width, and the middle value of the interval is determined as the standard strip width according to the interval to which the target strip width belongs. For example, the target strip width is 1230 mm, and the divided intervals include: [1020, 1200), [1200, 1240), and [1240, 1280]. The target strip width belongs to the [1200, 1240) interval, and the middle value of the interval is 1220. Then 1220 mm is used as the standard strip width for roller design.

[0097] Step S2032, obtain the roll length, and calculate the flat roll section length, chamfer section length, chamfer section depth and chamfer extension section depth according to the standard strip width and roll length.

[0098] Specifically, the roll length and standard strip width are fixed values. The roll length includes the flat roll section length, chamfer section length, and chamfer extension section length. The standard strip width includes the flat roll section length and chamfer section length. After the standard strip width is determined according to the incoming material width, the flat roll section length, chamfer section length, chamfer section depth, and chamfer extension section depth are calculated according to the roll length and standard strip width to obtain the final intermediate roll profile.

[0099] The cold rolling mill intermediate roll profile design method provided in this embodiment calculates the flat roll section length, chamfer section length, chamfer section depth, and chamfer extension section depth according to the standard strip width. The value accuracy requirements of these parameters are low, the calculation is convenient, and the numerical values ​​are accurate. The specific roll profile of the intermediate roll can be obtained through these parameters, and the entire intermediate roll is divided into three different roll profiles, allowing different contact methods to be adopted in different incoming material states to adapt to different material properties and rolling requirements.

[0100] In some optional embodiments, the target intermediate roller includes an upper intermediate roller and a lower intermediate roller, and the upper intermediate roller and the lower intermediate roller are anti-symmetric structures. The above step S2032 includes:

[0101] Step b1, taking the center position of the roller as the origin and the axis direction of the roller as the X-axis, a plane rectangular coordinate system is established. The roller shape calculation formula of the upper intermediate roller is:

[0102]

[0103]

[0104]

[0105] in, Indicates the coordinates of the connection point between the flat roller segment and the chamfered segment, Indicates the coordinates of the connection point between the chamfer section and the chamfer extension section. Indicates the coordinates of the end point of the chamfer extension section, R indicates the radius of the chamfer section, Indicates the chamfer segment length.

[0106] Specifically, the roller type design of the middle roller is a unilateral asymmetric roller type, the upper middle roller and the lower middle roller are anti-symmetric structures, the transmission side edge of the upper middle roller is the roller type design section, and the operating side edge of the lower middle roller is the roller type design section. It can also be understood that the roller type design sections of the upper middle roller and the lower middle roller are the same, but the installation directions are different.

[0107] Take the roller design of the above intermediate roller as an example to illustrate. Figure 4 As shown in the figure, a plane rectangular coordinate system is established with the center position of the roll as the origin and the roll axis direction of the intermediate roll as the X-axis. The coordinates of the starting point of the flat roll section of the upper intermediate roll are: The end point coordinates are ; The coordinates of the starting point of the chamfer segment are The end point coordinates are , if the center coordinates of the chamfered segment are set to , then according to the Pythagorean theorem of a triangle we get ; The coordinates of the starting point of the chamfer extension section are The end point coordinates are .

[0108] according to Figure 4 It can be seen that the calculation formula for the upper intermediate roller is:

[0109]

[0110]

[0111]

[0112] in, Indicates the coordinates of the connection point between the flat roller segment and the chamfered segment, Indicates the coordinates of the connection point between the chamfer section and the chamfer extension section. Indicates the coordinates of the end point of the chamfer extension section, R indicates the radius of the chamfer section, Indicates the chamfer segment length.

[0113] like represents the chamfer extension length, then , The target chamfer insertion amount of the intermediate roll.

[0114] Step b2, determining the length of the flat roller segment according to the coordinates of the connection point between the flat roller segment and the chamfered segment: , according to the coordinates of the connection point between the chamfer section and the chamfer extension section, the depth of the chamfer section is determined as: , according to the coordinates of the end point of the chamfer extension section, the depth of the chamfer extension section is determined as: .

[0115] The cold rolling mill intermediate roll profile design method provided in this embodiment determines the coordinates of each key point by establishing a coordinate system, and then determines the design parameter value of the intermediate roll. The roll profile calculation method is simple, and more parameter data are determined to ensure the accuracy of the roll profile design.

[0116] In some optional embodiments, the chamfered section is an arc roller type, the chamfered extension section is a straight roller type, and the chamfered extension section is tangent to the chamfered section at a connection point.

[0117] In some optional embodiments, ,in, Indicates standard strip width, Indicates the length of the roller.

[0118] Specifically, in actual production, the chamfering depth The value range is 0.04mm-0.06mm, and the depth of the chamfer extension section The value range is: 0.40mm-0.60mm, chamfer insertion amount The value range is , is only used as an example, but is not limited to this.

[0119] The present embodiment provides a method for designing the intermediate roll profile of a cold rolling mill, in which the chamfering section adopts an arc roll profile, and the chamfering starting section is located inside the strip. The arc section can smoothly connect the flat roll section and the chamfering extension section, thereby reducing stress concentration, avoiding tension and breakage of the strip plate in the chamfering section, and increasing the service life of the intermediate roll profile.

[0120] Step S204, numerically simulate the roll profile of the target intermediate roll according to the multiple design parameter values ​​of the target intermediate roll to obtain the strip edge drop value of the target intermediate roll. Figure 1 Step S104 of the illustrated embodiment will not be described in detail here.

[0121] Step S205: If the strip edge drop value of the target intermediate roll is greater than the preset edge drop threshold, return to the step of dividing the historical strip width data into multiple intervals, increase the number of intervals, and redesign the roll shape until the strip edge drop value of the target intermediate roll is no greater than the preset edge drop threshold. Figure 1 Step S105 of the illustrated embodiment will not be described in detail here.

[0122] The cold rolling mill intermediate roll profile design method provided in this embodiment sets multiple design standards according to historical strip width data, and calculates the roll profile according to the design standards corresponding to the target strip width. The optimal design roll profile is selected through simulation verification, which can improve the harmful bending moment generated by the intermediate roll on the working roll, improve the edge drop of non-oriented silicon steel, and improve the transverse thickness accuracy control capability of the cold rolling mill.

[0123] In a specific implementation, in a large steel plant, the length of the intermediate roll of the cold rolling mill is 1420 mm, which is used as the design basis for the roll length. The cold rolled products in the past year are 1 million tons; the incoming material width is 1230 mm, and the specific roll design process is as follows:

[0124] (1) Historical data collection and analysis:

[0125] The width of cold-rolled strip in the plant where the cold rolling mill is located in the past year was collected. The maximum strip width produced in the plant was 1280mm and the minimum width was 1020mm. The strip was divided into three intervals: [1020, 1200), [1200, 1240), and [1240, 1280]. The output of each interval was 300,000 tons, 400,000 tons, and 300,000 tons, respectively.

[0126] (2) Determination of roller design standards:

[0127] In each width range, the middle widths are: 1110mm, 1220mm, 1260mm; according to the incoming material width of 1230mm, it belongs to the width range of [1200, 1240), so the roller design standard is designed according to the width of 1220mm.

[0128] (3) Roller shape calculation:

[0129] Select 540mm; 610mm, 0.05mm, 70mm; 710mm, 0.40mm, 100mm, .

[0130] According to the above conditions, the roller type calculation formula is used to calculate and obtain the design parameter value of the upper intermediate roller.

[0131]

[0132]

[0133]

[0134] (4) The specific roller shifting method is as follows: in the coarse adjustment module, in order to make the roller profile depth corresponding to the edge of the strip a fixed value of 0.05 mm, the upper roller shifts 5 mm toward the transmission side and the lower roller shifts 5 mm toward the operating side; in the fine adjustment module, the plate shape automatic determination system performs identification and determination.

[0135] (5) Roller profile verification analysis: The roller profile is numerically simulated, and the results of the numerical simulation show that the edge drop is ≤7μm. If it meets the requirements, the roller profile design is carried out based on the design parameter values ​​obtained by the above roller profile calculation.

[0136] In another specific embodiment, in a large steel plant, the length of the intermediate roll of the cold rolling mill is 1420 mm, which is used as the design basis for the roll length. The cold rolled products in the past year are 1 million tons; the incoming material width is 1180 mm, and the specific roll shape design process is as follows:

[0137] (1) Data collection and analysis:

[0138] The width of cold-rolled strip in the plant where the cold rolling mill is located in the past year was collected. The maximum strip width produced in the plant was 1280mm and the minimum width was 1020mm. The strip was divided into three intervals: [1020, 1200), [1200, 1240), and [1240, 1280]. The output of each interval was 300,000 tons, 400,000 tons, and 300,000 tons, respectively.

[0139] (2) Roller type standard formulation:

[0140] In each width range, the middle widths are: 1110mm, 1220mm, 1260mm; according to the incoming material width of 1180mm, it belongs to the width range of [1020, 1200), so the roller design standard is designed according to the width of 1110mm.

[0141] (3) Roller shape calculation:

[0142] Select 485mm; 555mm, 0.05mm, 70mm; 710mm, 0.40mm, 160mm, .

[0143] According to the above conditions, the roller type calculation formula is used to calculate and obtain the design parameter value of the upper intermediate roller.

[0144]

[0145]

[0146]

[0147] (4) The specific roller shifting method is as follows: in the coarse adjustment module, in order to make the roller profile depth corresponding to the edge of the strip a fixed value of 0.05 mm, the upper roller shifts 35 mm toward the transmission side and the lower roller shifts 35 mm toward the operating side; in the fine adjustment module, the plate shape automatic determination system performs identification and determination.

[0148] (5) Roller profile verification analysis: The roller profile is numerically simulated. The result of the numerical simulation shows that if the edge drop is greater than 7 μm, the process returns to the interval division step and the width interval is redivided.

[0149] (5.1) The intervals are re-divided into: [1020, 1110), [1110, 1200), [1200, 1240), [1240, 1280]. According to the incoming material width of 1180mm, it belongs to the width interval of [1110, 1200), so the roller design standard is designed based on the width of 1155mm.

[0150] (5.2) Roller shape calculation:

[0151] Select 508mm; 578mm, 0.05mm, 70mm; 710mm, 0.40mm, 132mm, .

[0152] (5.3) Based on the above conditions, the roller profile calculation formula is used to recalculate and obtain the design parameter value of the upper intermediate roller.

[0153]

[0154]

[0155]

[0156] (5.4) The specific roller shifting method is as follows: in the coarse adjustment module, in order to make the roller profile depth corresponding to the edge of the strip a fixed value of 0.05 mm, the upper roller shifts 12 mm toward the transmission side and the lower roller shifts 12 mm toward the operating side; in the fine adjustment module, the plate shape automatic determination system performs identification and determination.

[0157] (5.5) Roller profile verification analysis: The roller profile was subjected to numerical simulation, and the results of the numerical simulation indicated that the edge drop was ≤7 μm.

[0158] During actual use, the compliance rate of the edge drop level controlled at 7μm was increased from 62.4% to over 72.7%. The intermediate roller has a long service life, and there is no color difference on the surface of the strip at the end of the roller use, so the cold-rolled products produced meet customer needs.

[0159] In this embodiment, a device for designing the profile of an intermediate roll of a cold rolling mill is also provided, and the device is used to implement the above-mentioned embodiments and preferred implementation modes, and the descriptions that have been made are omitted. As used below, the term "module" can be a combination of software and / or hardware that implements a predetermined function. Although the device described in the following embodiments is preferably implemented in software, the implementation of hardware, or a combination of software and hardware, is also possible and conceivable.

[0160] This embodiment provides a device for designing the profile of an intermediate roll of a cold rolling mill. Figure 5 As shown, including:

[0161] The historical data acquisition module 501 is used to acquire a plurality of historical strip steel width data, sort the historical strip steel width data from small to large, and determine the maximum value and the minimum value of the historical strip steel width data.

[0162] The interval division module 502 is used to divide the historical strip width data into multiple intervals according to the maximum and minimum values ​​of the historical strip width data, and determine the roller design standard of each interval.

[0163] The roll shape calculation module 503 is used to determine the roll shape design standard of the target intermediate roll according to the interval to which the target strip width belongs, and perform roll shape calculation according to the roll shape design standard of the target intermediate roll to obtain multiple design parameter values ​​of the target intermediate roll.

[0164] The numerical simulation module 504 is used to perform numerical simulation on the roll profile of the target intermediate roll according to multiple design parameter values ​​of the target intermediate roll to obtain the strip edge drop value of the target intermediate roll.

[0165] The design update module 505 is used to return to the step of dividing the historical strip width data into multiple intervals, increase the number of intervals, and redesign the roller shape if the strip edge drop value of the target intermediate roller is greater than the preset edge drop threshold, until the strip edge drop value of the target intermediate roller is not greater than the preset edge drop threshold.

[0166] In some optional implementations, the interval division module 502 includes:

[0167] The output threshold determination unit is used to obtain the total output corresponding to multiple historical strip width data and determine the interval output threshold based on the total output.

[0168] The interval range determination unit is used to determine the range of each interval according to the interval production threshold.

[0169] The interval division unit is used to divide the historical strip steel width data into multiple intervals according to the range of each interval and the maximum and minimum values ​​of the historical strip steel width data, and the range of each interval is within the range of the range.

[0170] The design standard determination unit is used to use the middle value of each interval as the roller shape design standard of the corresponding interval.

[0171] In some optional implementations, the roll shape calculation module 503 includes:

[0172] The standard strip steel width determination unit is used to determine the middle value of the interval according to the interval to which the target strip steel width belongs, and use the middle value of the interval as the standard strip steel width.

[0173] The parameter calculation unit is used to obtain the roll length, and calculate the flat roll section length, chamfer section length, chamfer section depth and chamfer extension section depth according to the standard strip width and roll length.

[0174] The further functional description of each of the above modules and units is the same as that of the above corresponding embodiments and will not be repeated here.

[0175] The cold rolling mill intermediate roll profile design device in this embodiment is presented in the form of a functional unit, where the unit refers to an ASIC (Application Specific Integrated Circuit) circuit, a processor and memory that executes one or more software or fixed programs, and / or other devices that can provide the above functions.

[0176] The embodiment of the present invention also provides a computer device having the above Figure 5 The roll profile design device of the intermediate roll of the cold rolling mill is shown.

[0177] See also Figure 6 , Figure 6is a schematic diagram of the structure of a computer device provided by an optional embodiment of the present invention, such as Figure 6 As shown, the computer device includes: one or more processors 10, a memory 20, and interfaces for connecting various components, including high-speed interfaces and low-speed interfaces. Various components are connected to each other using different buses for communication, and can be installed on a common mainboard or installed in other ways as needed. The processor can process the instructions executed in the computer device, including instructions stored in or on the memory to display the graphical information of the GUI on an external input / output device (such as, a display device coupled to the interface). In some optional embodiments, if necessary, multiple processors and / or multiple buses can be used together with multiple memories and multiple memories. Similarly, multiple computer devices can be connected, and each device provides some necessary operations (for example, as a server array, a group of blade servers, or a multi-processor system). Figure 6 A processor 10 is taken as an example.

[0178] The processor 10 may be a central processing unit, a network processor or a combination thereof. The processor 10 may further include a hardware chip. The hardware chip may be a dedicated integrated circuit, a programmable logic device or a combination thereof. The programmable logic device may be a complex programmable logic device, a field programmable gate array, a general purpose array logic or any combination thereof.

[0179] The memory 20 stores instructions executable by at least one processor 10, so that the at least one processor 10 executes the method shown in the above embodiment.

[0180] The memory 20 may include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application required for at least one function; the data storage area may store data created according to the use of the computer device, etc. In addition, the memory 20 may include a high-speed random access memory, and may also include a non-transient memory, such as at least one disk storage device, a flash memory device, or other non-transient solid-state storage device. In some optional embodiments, the memory 20 may optionally include a memory remotely arranged relative to the processor 10, and these remote memories may be connected to the computer device via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0181] The memory 20 may include a volatile memory, such as a random access memory; the memory may also include a non-volatile memory, such as a flash memory, a hard disk or a solid state drive; the memory 20 may also include a combination of the above types of memory.

[0182] The computer device further comprises a communication interface 30 for the computer device to communicate with other devices or a communication network.

[0183] The embodiment of the present invention also provides a computer-readable storage medium. The method according to the embodiment of the present invention can be implemented in hardware, firmware, or can be implemented as a computer code that can be recorded in a storage medium, or can be implemented as a computer code that is originally stored in a remote storage medium or a non-temporary machine-readable storage medium and will be stored in a local storage medium through a network download, so that the method described herein can be stored in such software processing on a storage medium using a general-purpose computer, a dedicated processor, or programmable or dedicated hardware. Among them, the storage medium can be a magnetic disk, an optical disk, a read-only storage memory, a random access memory, a flash memory, a hard disk or a solid-state hard disk, etc.; further, the storage medium can also include a combination of the above types of memories. It can be understood that a computer, a processor, a microprocessor controller, or programmable hardware includes a storage component that can store or receive software or computer code. When the software or computer code is accessed and executed by a computer, a processor, or hardware, the method shown in the above embodiment is implemented.

[0184] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A method for designing a cold rolling mill intermediate roll profile, characterized in that: The method comprises: Acquire multiple historical strip steel width data, and sort the historical strip steel width data from small to large, and determine the maximum value and minimum value of the historical strip steel width data; Dividing the historical strip steel width data into a plurality of intervals according to the maximum value and the minimum value of the historical strip steel width data, and determining the roller design standard for each interval; Determining a roll profile design standard of a target intermediate roll according to the interval to which the target strip width belongs, and performing roll profile calculation according to the roll profile design standard of the target intermediate roll to obtain multiple design parameter values ​​of the target intermediate roll; Performing numerical simulation on the roll profile of the target intermediate roll according to multiple design parameter values ​​of the target intermediate roll to obtain the strip edge drop value of the target intermediate roll; If the strip edge drop value of the target intermediate roller is greater than the preset edge drop threshold, return to the step of dividing the historical strip width data into multiple intervals, increase the number of intervals, and redesign the roller shape until the strip edge drop value of the target intermediate roller is no greater than the preset edge drop threshold.

2. The method according to claim 1, characterized in that: The method further comprises: Determine the coarse adjustment of the roll shifting amount according to the interval to which the target strip width belongs; Obtaining a flatness value of a target steel strip, and comparing the flatness value of the target steel strip with a preset target flatness value to determine a fine adjustment roll shifting amount; The target intermediate roller is controlled to shift according to the coarse adjustment roll shifting amount and the fine adjustment roll shifting amount.

3. The method according to claim 1, characterized in that: The historical strip steel width data is divided into a plurality of intervals according to the maximum value and the minimum value of the historical strip steel width data, and the roller profile design standard of each interval is determined, including: Obtain the total output corresponding to multiple historical strip width data, and determine the interval output threshold according to the total output; Determine the range of each interval according to the interval production threshold; Dividing the historical strip steel width data into a plurality of intervals according to the range of each interval and the maximum and minimum values ​​of the historical strip steel width data, wherein the range of each interval is within the range of the range; The middle value of each interval is used as the roller design standard for the corresponding interval.

4. The method according to claim 3, characterized in that The design parameter values ​​include: standard strip width, flat roll section length, chamfer section length, chamfer section depth and chamfer extension section depth; The roller profile design standard of the target intermediate roller is determined according to the interval to which the target strip width belongs, and the roller profile is calculated according to the roller profile design standard of the target intermediate roller to obtain multiple design parameter values ​​of the target intermediate roller, including: Determine the middle value of the interval according to the interval to which the target strip steel width belongs, and use the middle value of the interval as the standard strip steel width; The roll length is obtained, and the flat roll section length, chamfer section length, chamfer section depth and chamfer extension section depth are calculated according to the standard strip width and the roll length.

5. The method according to claim 4, characterized in that The target intermediate roller comprises an upper intermediate roller and a lower intermediate roller, and the upper intermediate roller and the lower intermediate roller are in an anti-symmetric structure; The flat roll section length, chamfer section length, chamfer section depth and chamfer extension section depth are calculated according to the standard strip width and roll length, including: With the center of the roll as the origin and the X-axis as the axis of the roll, a rectangular coordinate system is established. The roll shape calculation formula of the upper intermediate roll is: in, Indicates the coordinates of the connection point between the flat roller segment and the chamfered segment, Indicates the coordinates of the connection point between the chamfer section and the chamfer extension section. Indicates the coordinates of the end point of the chamfer extension section, R indicates the radius of the chamfer section, Indicates the length of the chamfer section; According to the coordinates of the connection points between the flat roll section and the chamfered section, the length of the flat roll section is determined as: , according to the coordinates of the connection point between the chamfer section and the chamfer extension section, the depth of the chamfer section is determined as: , according to the coordinates of the end point of the chamfer extension section, the depth of the chamfer extension section is determined as: .

6. The method according to claim 5, characterized in that The chamfering section is an arc roller type, the chamfering extension section is a straight roller type, and the chamfering extension section is tangent to the chamfering section at a connection point.

7. The method according to claim 5, characterized in that in, Indicates standard strip width, Indicates the length of the roller.

8. A cold rolling mill intermediate roll profile design device, characterized in that: The device comprises: A historical data acquisition module is used to acquire a plurality of historical strip steel width data, and sort the historical strip steel width data from small to large, and determine the maximum value and the minimum value of the historical strip steel width data; An interval division module, used for dividing the historical strip steel width data into a plurality of intervals according to the maximum value and the minimum value of the historical strip steel width data, and determining the roller design standard of each interval; A roll shape calculation module, used to determine the roll shape design standard of the target intermediate roll according to the interval to which the target strip width belongs, and perform roll shape calculation according to the roll shape design standard of the target intermediate roll to obtain multiple design parameter values ​​of the target intermediate roll; A numerical simulation module, used for performing numerical simulation on the roll profile of the target intermediate roll according to a plurality of design parameter values ​​of the target intermediate roll, so as to obtain the strip edge drop value of the target intermediate roll; A design update module is used to return to the step of dividing the historical strip width data into multiple intervals, increase the number of intervals, and redesign the roller shape if the strip edge drop value of the target intermediate roller is greater than the preset edge drop threshold, until the strip edge drop value of the target intermediate roller is no greater than the preset edge drop threshold.

9. A computer device, characterized in that: include: A memory and a processor, wherein the memory and the processor are communicatively connected to each other, the memory stores computer instructions, and the processor executes the method according to any one of claims 1 to 7 by executing the computer instructions.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a computer to execute the method according to any one of claims 1 to 7.

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