Hot continuous rolling and finish rolling water beam mark position tracking method

Abstract

The invention discloses a hot continuous rolling and finish rolling water beam mark position tracking method, which belongs to the technical field of metallurgical automation control, and comprises the following steps: according to the size of a plate blank in a heating furnace, obtaining the number of water beams in contact with the plate blank, the diameter of the water beams in contact with the plate blank and the distance between the water beams; calculating the position of the water beam in contact with the slab in the length direction of the slab; calculating the position of each water beam corresponding to the length direction of strip steel at the outlet of each finish rolling rack when the plate blank is heated in the heating furnace according to the size of a finished plate blank; correcting the position of each water beam in the length direction of strip steel rolled by each finish rolling rack according to the head cutting length of the head of the plate blank in a flying shear procedure before finish rolling; according to the rolling speed of each finish rolling rack, calculating the starting time and the ending time when each water beam position of the outlet strip steel is rolled by a rolling mill. According to the method, the problem of position tracking of the steel beam mark with the liquid in the finish rolling process in the hot continuous rolling production line is solved, and the method has positive significance in improving the hot continuous rolling finish rolling thickness control quality.

Description

Technical Field

[0001] The invention relates to the technical field of metallurgical automation control, in particular to a method for tracking the position of a water beam mark in a hot rolling finishing mill. Background Art

[0002] Hot rolling lines are typically equipped with a walking-beam furnace to heat the slabs. The slabs are supported and moved by the coordinated operation of fixed and movable beams within the furnace. Movement within the furnace is achieved by the periodic motion of a movable walking beam at the furnace's bottom, which transports the slabs from the loading to the tapping side via sequential control. However, during the slab heating process, the fixed and movable beams themselves block the slab's radiant heat transfer, resulting in inadequate heating near the contact point between the slab and the spacer. This results in relatively low temperatures and a darker color in the area surrounding the contact point, creating a watermark. Without specialized thickness control methods, this watermark can cause regular and sudden variations in thickness. Therefore, accurately tracking the location of the watermark during the rolling process is crucial for improving thickness quality control.

[0003] In the current existing technology, there is no relevant technology for tracking the watermark position of hot-rolled finishing strip. Patent application with application number CN112139252A proposes a method for optimizing the thickness control of rolled products for watermarks after heating. It discloses a method for optimizing the thickness control of rolled products for watermarks after heating. During the rolling process, the watermark position is found; before and after the watermark position of the next rolling pass, the roll gap compensation gain is optimized to eliminate thickness fluctuations caused by large fluctuations in rolling force. By developing a watermark recognition function, the watermark position can be predicted in advance, and through AGC adjustment, the stability of thickness control is improved, and the occurrence of rolling plate differences is reduced.

[0004] In summary, in the prior art, there is a lack of a method for accurately tracking the position of the water beam mark of the strip during the rolling process. Summary of the Invention

[0005] This invention provides a method for tracking the position of the water beam mark during hot-rolled finishing milling, aiming to address the technical challenges of tracking the position of the water beam mark on finished steel strip in hot-rolled production lines. This method, described in the present invention, effectively tracks the position of the water beam mark along the length of the strip during rolling through automated means combined with relevant rolling parameters, significantly improving the quality control of strip thickness.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0007] A method for tracking the position of a water beam mark in a hot rolling finishing mill, the method comprising:

[0008] (1) According to the size of the slab in the heating furnace, the number of water beams in contact with the slab, the diameter of the water beams in contact with the slab, and the spacing between the water beams are obtained;

[0009] (2) Calculate the position of the water beam in contact with the slab along the length direction of the slab;

[0010] (3) Calculate the length direction of the strip at the exit of each finishing rolling stand corresponding to the position of each water beam when the slab is heated in the heating furnace according to the finished slab size;

[0011] (4) According to the cutting length of the slab head in the flying shear process before finishing rolling, the position of each water beam in the longitudinal direction of the strip rolled in each stand of finishing rolling is corrected;

[0012] (5) Calculate the start and end time of each water beam position of the export strip passing through the rolling mill based on the rolling speed of each finishing rolling stand.

[0013] Furthermore, in step (2), the formula for calculating the position of the water beam in contact with the slab in the length direction of the slab is:

[0014]

[0015] Where, x(m) is the starting position of the m-th water beam printed on the slab in the heating furnace; x′(m) is the ending position of the m-th water beam printed on the slab in the heating furnace; L J is the length of the slab heated in the heating furnace; n is the number of water beam marks under the slab, n = 1, 2, 3...N, N is the total number of water beam marks under the slab, the first one is recorded as 1, the second one is recorded as 2, and so on; s is the distance between the center lines of the two water beam marks; d is the diameter of the water beam.

[0016] Furthermore, step (3) includes:

[0017] The length of the strip rolled out of each finishing stand is calculated based on the slab heated in the heating furnace. The position of the water beam in contact with the slab in the heating furnace in the length direction of the slab is calculated based on the position of each water beam in the length direction of the strip at the outlet of each finishing stand.

[0018] Furthermore, the length of the strip rolled out of each finishing rolling stand is calculated based on the slab heated in the heating furnace, and the formula is:

[0019]

[0020] Among them, L Fi is the length of the strip rolled out of the i-th stand of the finishing rolling mill; where i represents the number of finishing mills, such as i = 1, 2, 3...M, M is the total number of finishing mills, and the value range is 6 to 8; L J h is the length of the heated slab in the heating furnace; J is the thickness of the heated slab in the heating furnace; wJ h is the width of the heated slab in the heating furnace; Fi w is the thickness of the strip rolled out of the finishing mill stand i; F It is the strip width at the outlet of the finishing mill stand.

[0021] Furthermore, the position of each water beam in the length direction of the strip at the outlet of each finishing mill stand is calculated using the following formula:

[0022]

[0023] Wherein, Fxi(m) is the starting position of the m-th water beam printed on the i-th stand of the finishing mill to roll out the strip; Fx′i(m) is the ending position of the m-th water beam printed on the i-th stand of the finishing mill to roll out the strip; L J h is the length of the heated slab in the heating furnace; J is the thickness of the heated slab in the heating furnace; w J h is the width of the heated slab in the heating furnace; Fi w is the thickness of the strip rolled out of the finishing mill stand i; F is the strip width at the outlet of the finishing mill stand; s is the distance between the center lines of the two water beam marks; d is the diameter of the water beam.

[0024] Furthermore, in step (4), the head cutting length of the flying shear is the length of the irregular shape of the head of the intermediate billet that is about to enter the finishing mill for rolling, and the length direction position of each water beam in each finishing mill stand is corrected by the head cutting length.

[0025] According to the cutting length of the flying shear before finishing rolling, the correction amount of the strip length at the outlet of each finishing stand is calculated. The calculation formula is:

[0026]

[0027] Among them, L Fi0 h is the correction amount of the cutting length of the flying shear before finishing rolling to the strip length at the outlet of each finishing stand; R h is the thickness of the intermediate billet entering the finishing mill; Fi L is the thickness of the strip rolled out of the finishing rolling stand i; C The cutting length of the flying shear.

[0028] Furthermore, in step (4), the position of each water beam in the longitudinal direction of the strip rolled in each finishing rolling stand is corrected by the cut length, and the calculation formula is:

[0029]

[0030] Wherein, Fxic(m) is the starting position of the mth water beam printed on the i-th stand of the finishing mill according to the trimming length; Fx′ic(m) is the ending position of the mth water beam printed on the i-th stand of the finishing mill according to the trimming length; LJ is the length of the heated slab in the heating furnace; s is the distance between the center lines of the two water beam marks; d is the diameter of the water beam; h J is the thickness of the heated slab in the heating furnace; w J h is the width of the heated slab in the heating furnace; Fi w is the thickness of the strip rolled out of the finishing mill stand i; F L is the strip width at the outlet of the finishing mill; Fi0 It is the correction amount of the strip length at the outlet of each finishing rolling stand based on the cutting length of the flying shear before finishing rolling.

[0031] Furthermore, step (5) includes: calculating the strip speed at the outlet of each finishing mill based on the rolling speed of each finishing mill stand and the forward slip of the strip; calculating the rolling time of each water beam mark passing through each finishing mill based on the starting position and ending position of each water beam mark at each finishing mill obtained by calculation in step (4).

[0032] Furthermore, the formula for calculating the strip speed at the exit of each finishing mill is:

[0033] v Fsi =v Fi ×(1+f Fi )

[0034] Among them, v Fsi v is the strip rolling speed of the finishing rolling stand i; Fi f is the linear speed of the rollers in the finishing rolling stand i; Fi It is the forward sliding of the exit strip of the finishing rolling stand i.

[0035] Furthermore, the formula for calculating the rolling time of each water beam mark passing through each finishing mill is:

[0036]

[0037] Among them, T Fi(m) T′ is the time required for the finishing rolling stand i to pass the starting position of the mth water beam mark; Fi(m) is the time required for the finishing mill stand i to pass the end position of the mth water beam mark; Fxic(m) is the starting position of the mth water beam mark at the finishing mill stand i after the strip is rolled out, corrected according to the crop length; Fx′ic(m) is the end position of the mth water beam mark at the finishing mill stand i after the strip is rolled out, corrected according to the crop length; v Fsi is the strip rolling speed of the finishing rolling stand i

[0038] On the other hand, the present invention further provides an electronic device, comprising a processor and a memory; wherein the memory stores at least one instruction, and the instruction is loaded and executed by the processor to implement the above method.

[0039] In yet another aspect, the present invention further provides a computer-readable storage medium, wherein the storage medium stores at least one instruction, and the instruction is loaded and executed by a processor to implement the above method.

[0040] The beneficial effects brought about by the technical solution provided by the present invention include at least:

[0041] The present invention provides a method for tracking the position of water beam marks in hot-rolled finishing mills. The method determines the number of water beams in contact with the slab, its diameter, and the spacing between them based on the size of the slab being heated in the heating furnace. The method also calculates the lengthwise position of each water beam along the slab. Based on the finished slab size, the method calculates the lengthwise position of the strip at the exit of each finishing mill stand corresponding to the position of each water beam when the slab is heated in the heating furnace. The method also corrects the rolling length of each finishing mill stand based on the length of the "cropped" slab head caused by the flying shear process before finishing. Finally, the method calculates the start and end times of each water beam position as the strip passes through the mill based on the rolling speed of each finishing mill stand. This method solves the problem of tracking the position of strip water beam marks during finishing rolling in hot-rolled mills, significantly improving the quality of thickness control in hot-rolled finishing mills. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0043] Figure 1 This is a flow chart of a method for tracking the position of a water beam mark in a hot rolling finishing mill provided by an embodiment of the present invention;

[0044] Figure 2 This is a schematic diagram of a slab being heated and placed in a heating furnace according to a method for tracking the position of a water beam mark of a hot rolling finishing mill provided by an embodiment of the present invention;

[0045] Figure 3 This is a system block diagram of an electronic device provided by an embodiment of the present invention.

[0046] Explanation of reference numerals: 21, slab; 31, fixed beam; 32, movable beam. DETAILED DESCRIPTION

[0047] To make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0048] First, it should be noted that in the embodiments of the present invention, words such as "exemplarily" and "for example" are used to indicate examples, illustrations, or explanations. Any embodiment or design described as an "example" in the present invention should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of the word "exemplarily" is intended to present concepts in a concrete manner. In addition, in the embodiments of the present invention, the meaning of "and / or" can be both or either of the two.

[0049] First embodiment: This embodiment provides a method for tracking the position of water beam marks in hot-rolled finishing rolling, which obtains the number of water beams in contact with the slab, the diameter of the water beams, and the spacing between the water beams according to the size of the slab heated by the heating furnace; calculates the position of each water beam in the length direction of the slab; calculates the position of each water beam in the length direction of the outlet strip of each finishing rolling stand corresponding to the position of each water beam when the slab is heated in the heating furnace according to the finished slab size; corrects the rolling length of each finishing rolling stand according to the "cut-off" length of the slab head in the flying shear process before finishing rolling; calculates the start and end time of each water beam position of the outlet strip when passing through the rolling mill according to the rolling speed of each finishing rolling stand.

[0050] The execution process of this method is as follows Figure 1 As shown, the following steps are included:

[0051] S1, according to the size of the slab being heated in the heating furnace, obtain the number of water beams in contact with the slab, the diameter of the water beams, and the distance between the water beams;

[0052] Specifically, in this embodiment, the above S1 includes the following steps:

[0053] Determine the number of water beams in contact with the heated slab as n, the diameters of the fixed beams and the movable beam as d, in m, and the spacing between adjacent water beams as s, in m.

[0054] S2, calculate the position of each water beam in the length direction of the slab;

[0055] Specifically, in this embodiment, the above S2 includes the following steps:

[0056] The calculation formula for the position of the water beam in contact with the slab in the length direction of the slab is:

[0057]

[0058] Where x(m) is the starting position of the m-th water beam printed on the slab in the heating furnace; x′(m) is the ending position of the m-th water beam printed on the slab in the heating furnace; L Jis the length of the slab heated in the heating furnace; n is the number of water beam marks under the slab, n = 1, 2, 3...N, N is the total number of water beam marks under the slab; the first one is recorded as 1, the second one is recorded as 2, and so on; s is the distance between the center lines of the two water beam marks; d is the diameter of the water beam, in m; x′(m) is the end position of the mth water beam mark on the slab in the heating furnace, in m.

[0059] S3, calculating the length direction of the strip at the exit of each finishing rolling mill stand corresponding to the position of each water beam when the slab is heated in the heating furnace according to the finished slab size;

[0060] Specifically, in this embodiment, the above S3 includes the following steps:

[0061] The length of the strip rolled out of each finishing mill stand is calculated based on the slab heated in the heating furnace. The position of the water beam in contact with the slab in the heating furnace along the length direction of the slab is calculated.

[0062] S31, the formula for calculating the length of the strip rolled out of each finishing rolling stand based on the slab heated in the heating furnace is:

[0063]

[0064] Among them, L Fi L is the length of the strip rolled out of the i-th stand in the finishing rolling mill, in meters; i represents the number of finishing mills, such as i = 1, 2, 3...M, M is the total number of finishing mills, ranging from 6 to 8; J h is the length of the slab heated by the heating furnace, in m; J is the thickness of the slab heated by the heating furnace, in m; w J h is the width of the slab heated by the heating furnace, in m; Fi is the thickness of the strip rolled out of the finishing mill stand i, in m; w F is the strip width at the outlet of the final stand of finishing rolling mill, in m; i represents the number of finishing mills.

[0065] S32, the formula for calculating the position of each water beam in the strip length direction at the outlet of each finishing mill stand is:

[0066]

[0067] Among them, Fxi(m) is the starting position of the mth water beam printed on the i-th stand of the finishing rolling mill, and the unit is m; L J is the length of the slab heated by the heating furnace, in m; n is the number of water beam marks below the slab, the first one is recorded as 1, the second one is recorded as 2, and so on; s is the center line distance between the two water beam marks, in m; d is the diameter of the water beam, in m; h J is the thickness of the slab heated by the heating furnace, in m; w Jh is the width of the slab heated by the heating furnace, in m; Fi is the thickness of the strip rolled out of the finishing mill stand i, in m; w F is the strip width at the exit of the last stand of finishing rolling, in m; Fx′i(m) is the end position of the strip rolled out by the mth water beam printed on the ith stand of finishing rolling, in m; i represents the number of finishing mills.

[0068] S4, according to the “cut-off” length of the slab head in the flying shear process before finishing rolling, the rolling length of each stand of finishing rolling is corrected;

[0069] Specifically, in this embodiment, the above S4 includes the following steps:

[0070] The "cut-off" length of the flying shear is the length of the irregular shape of the head of the intermediate billet that is about to enter the finishing mill for rolling. The "cut-off" length is needed to correct the length direction position of each water beam in the finishing rolling stand of the rolled strip.

[0071] S41, according to the "crop" length of the flying shear before finishing rolling, the calculation formula for the strip length correction of each finishing stand is:

[0072]

[0073] Among them, L Fi0 h is the correction amount of the strip length at the outlet of each stand of finishing rolling due to the “cut length” of the flying shear before finishing rolling, in m; R is the thickness of the intermediate billet entering the finishing mill, in m; h Fi is the thickness of the strip rolled out of the finishing rolling stand i, in m; L C is the length of the flying shear "cut head", in meters; i represents the number of finishing mills;

[0074] S42, the calculation formula for correcting the position of each water beam in the longitudinal direction of the strip rolled in each finishing rolling stand is as follows:

[0075]

[0076] Wherein, Fxic(m) is the starting position of the strip rolled out by the mth water beam mark at the i-th stand of the finishing mill, corrected according to the length of the “crop”, in m; L is the length of the slab heated by the heating furnace, in m; n is the number of water beam marks under the slab, the first one is recorded as 1, the second one is recorded as 2, and so on; L J is the length of the slab heated by the heating furnace; s is the distance between the center lines of the two water beam marks, in m; d is the diameter of the water beam, in m; h J is the thickness of the slab heated by the heating furnace, in m; w J h is the width of the slab heated by the heating furnace, in m; Fi is the thickness of the strip rolled out of the finishing mill stand i, in m; wF L is the strip width at the outlet of the finishing mill stand, in m; Fi0 is the correction amount of the strip length at the outlet of the i-th finishing stand due to the “crop length” of the flying shear before finishing rolling, and the unit is m; Fx′ic(m) is the end position of the strip rolled out of the m-th water beam printed on the i-th finishing stand according to the “crop length” correction, and the unit is m; i represents the number of finishing mills.

[0077] S5, calculating the start and end time of each water beam position of the outlet strip passing through the rolling mill according to the rolling speed of each finishing rolling stand.

[0078] Specifically, in this embodiment, the above S5 includes the following steps:

[0079] According to the rolling speed of each finishing rolling stand and the forward slip of the strip, the strip speed at the outlet of each finishing mill is calculated. According to the starting and ending positions of each water beam mark at each finishing mill, the rolling time of each water beam mark passing through each finishing mill is calculated.

[0080] S51, the formula for calculating the strip speed at the exit of each finishing mill is:

[0081] v Fsi =v Fi ×(1+f Fi )

[0082] Among them, v Fsi is the strip rolling speed of the finishing rolling stand i, in m / s; v Fi is the linear speed of the rollers in the finishing rolling stand i, in m / s; f Fi It is the forward sliding of the strip at the outlet of the i-th finishing rolling stand; i represents the number of finishing mills.

[0083] S52, the formula for calculating the rolling time of each water beam mark passing through each finishing mill is:

[0084]

[0085] Among them, T Fi(m) is the time required for the finishing mill stand i to pass the starting position of the mth water beam mark, in seconds; Fxic(m) is the starting position of the mth water beam mark at the finishing mill stand i after the mth water beam mark is corrected according to the length of the “crop”, in meters; Fx′ic(m) is the ending position of the mth water beam mark at the finishing mill stand i after the mth water beam mark is corrected according to the length of the “crop”, in meters; v Fsi is the strip rolling speed of the finishing mill stand i, in m / s; T′ Fi(n) It is the time required for the i-th finishing rolling stand to pass the n-th water beam mark end position, in seconds; where i represents the number of finishing rolling stands, and n represents the number of water beam marks below the heating furnace heating slab.

[0086] Next, a method for tracking the position of a water beam mark in a hot rolling finishing mill of the present invention is applied to a hot rolling production line, and the implementation process of the method for tracking the position of a water beam mark in a hot rolling finishing mill of the present invention is further described. Specifically, in this application scenario, the method of the present invention is operated according to the following steps:

[0087] (1) According to the size of the slab heated by the heating furnace, the number of water beams in contact with the slab, the diameter of the water beams, and the distance between the water beams are obtained; Figure 2 As shown in the figure, the length of the heated slab is 9.8m, the number of water beams in contact with the heated slab is 9, the diameters of the fixed beams and the movable beams are 0.3m, and the spacing between adjacent water beams is 1m.

[0088] (2) Calculate the position of each water beam in the length direction of the slab; the calculation formula for the position of the water beam in contact with the slab in the length direction of the slab is:

[0089]

[0090] The calculation results are shown in Table 1 below:

[0091] Table 1 Calculation results based on the position of the water beam in contact with the slab in the length direction of the slab

[0092] n 1 2 3 4 5 6 7 8 9 x(n) 0.75 1.75 2.75 3.75 4.75 5.75 6.75 7.75 8.75 x′(n) 1.05 2.05 3.05 4.05 5.05 6.05 7.05 8.05 9.05

[0093] (3) Calculate the length direction of the strip at the exit of each stand of the finishing rolling mill corresponding to the position of each water beam when the slab is heated in the heating furnace according to the finished slab size;

[0094] The formula for calculating the length of strip rolled out of each stand of the finishing rolling mill based on the slab heated in the heating furnace is:

[0095]

[0096] The relevant data results are shown in Table 2 below:

[0097] Table 2 Calculation of strip length at each stand of finishing rolling mill based on slab heated in heating furnace

[0098]

[0099]

[0100] The formula for calculating the position of each water beam in the strip length direction at the outlet of each finishing stand is:

[0101]

[0102] The relevant data takes the first water beam mark as an example, and the results are shown in Table 3 below:

[0103] Table 3 takes the first water beam mark as an example, and shows the calculation results of the strip length position at the exit of each finishing stand:

[0104] i F1 F2 F3 F4 F5 F6 F7 F8 Fxi(1) 9.8 17.2 27.7 38.0 51.1 65.5 74.4 81.9 Fx′i(1) 13.7 24.1 38.8 53.3 71.6 91.7 104.2 114.6

[0105] (4) According to the “cut-off” length of the slab head in the flying shear process before finishing rolling, the rolling length of each stand of finishing rolling is corrected;

[0106] The calculation formula for the correction amount of strip length at the outlet of each stand of finishing rolling is calculated based on the “cut head” length of the flying shear before finishing rolling:

[0107]

[0108] The relevant data results are shown in Table 4 below:

[0109] Table 4 Calculation results of strip length correction

[0110] i F1 F2 F3 F4 F5 F6 F7 F8 <![CDATA[h R ]]> 0.031 0.031 0.031 0.031 0.031 0.031 0.031 0.031 <![CDATA[L C ]]> 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 <![CDATA[h Fi ]]> 0.0167 0.0095 0.0059 0.0043 0.0032 0.0025 0.0022 0.002 <![CDATA[L Fi0 ]]> 0.185 0.326 0.525 0.72 0.96 1.24 1.4 1.55

[0111] The calculation formula for correcting the position of each water beam in the length direction of the strip rolled in each finishing rolling stand by the "cut head" length is:

[0112]

[0113] The relevant data takes the first water beam mark as an example, and the results are shown in Table 5 below:

[0114] Table 5 Taking the first water beam mark as an example, the calculation results of the length direction position of the rolled strip in each stand of the finishing rolling mill

[0115] i F1 F2 F3 F4 F5 F6 F7 F8 <![CDATA[L Fi0 ]]> 0.185 0.326 0.525 0.72 0.96 1.24 1.4 1.55 Fxic(1) 9.62 16.91 27.24 37.37 50.22 64.28 73.05 80.35 Fx′ic(1) 13.54 23.81 38.34 52.61 70.7 90.49 102.83 113.12

[0116] (5) Calculate the start and end time of each water beam position of the outlet strip passing through the rolling mill according to the rolling speed of each finishing rolling stand;

[0117] The formula for calculating the strip speed at the exit of each finishing mill is:

[0118] v Fsi =v Fi ×(1+f Fi )

[0119] The relevant data results are shown in Table 6 below:

[0120] Table 6 Calculation results of strip speed at the exit of each finishing mill

[0121] i F1 F2 F3 F4 F5 F6 F7 F8 <![CDATA[v Fs ]]> 0.9 1.6 2.5 3.6 4.9 6.1 7.3 8.0 <![CDATA[f Fi ]]> 0.119 0.109 0.098 0.075 0.073 0.059 0.044 0.026 <![CDATA[v Fsi ]]> 1.007 1.774 2.745 3.87 5.257 6.459 7.621 8.208

[0122] The formula for calculating the rolling time of each water beam mark passing through each finishing mill is:

[0123]

[0124] The relevant data takes the first water beam mark as an example, and the results are shown in Table 7 below:

[0125] Table 7 Rolling time of the first water beam mark passing through each finishing mill

[0126]

[0127]

[0128] In summary, this embodiment provides a method for tracking the position of water beam marks in hot-rolled finishing mills. The method obtains the number of water beams in contact with the slab, as well as the water beam diameter and the spacing between the water beams based on the size of the slab heated in the heating furnace; calculates the lengthwise position of each water beam in the slab; calculates the lengthwise position of the strip at the outlet of each finishing mill stand corresponding to the position of each water beam when the slab is heated in the heating furnace based on the finished slab size; corrects the rolling length of each finishing mill stand based on the "head cut" length of the slab head in the flying shear process before finishing; and calculates the start and end time of each water beam position of the strip at the outlet when it passes through the rolling mill based on the rolling speed of each finishing mill stand. The present invention solves the problem of tracking the position of strip water beam marks during finishing rolling in a hot-rolled production line, and has positive significance for improving the quality of thickness control of hot-rolled finishing mills.

[0129] Second embodiment

[0130] This embodiment provides an electronic device, such as Figure 3 As shown, the electronic device includes: a processor and a memory; wherein the processor and the memory can be connected via a communication bus; the memory stores at least one instruction, which is loaded and executed by the processor to implement the method of the first embodiment described above. In addition, the electronic device may also include a transceiver; the processor and the transceiver can be connected via a communication bus, and the transceiver is used to communicate with other devices.

[0131] Next, combine Figure 3 The following is a detailed introduction to the various components of the electronic equipment:

[0132] Among them, the processor is the control center of the electronic device, and the electronic device may include multiple processors, each of which may be a single-core processor (single-CPU) or a multi-core processor (multi-CPU). The processor here can be a processor or a general term for multiple processing elements. For example, the processor is one or more central processing units (CPUs), or other general-purpose processors, application specific integrated circuits (ASICs), or one or more integrated circuits configured to implement an embodiment of the present invention, such as one or more microprocessors (digital signal processors, DSPs), or one or more field programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor, etc. The processor can perform various functions of the electronic device by running or executing software programs stored in the memory and calling data stored in the memory.

[0133] In a specific implementation, as an embodiment, the processor may include one or more CPUs, such as Figure 3 The CPU0 and CPU1 shown in FIG are, of course, only exemplary.

[0134] The memory is used to store the software program for executing the solution of the present invention, and the execution is controlled by the processor. The specific implementation method can refer to the above method embodiment and will not be repeated here.

[0135] Optionally, the memory may be a read-only memory (ROM) or other type of static storage device that can store static information and instructions, a random access memory (RAM) or other type of dynamic storage device that can store information and instructions, or an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compact disc, laser disc, optical disc, digital versatile disc, Blu-ray disc, etc.), a magnetic disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto. The memory may be integrated with the processor or exist independently and accessed through the interface circuit ( Figure 3 (not shown) is coupled to the processor, which is not specifically limited in this embodiment of the present invention.

[0136] The transceiver may include a receiver and a transmitter ( Figure 3 The receiver is used to implement the receiving function, and the transmitter is used to implement the sending function. The transceiver can be integrated with the processor or exist independently and communicate with the electronic device through the interface circuit ( Figure 3 (not shown) is coupled to the processor, which is not specifically limited in this embodiment of the present invention.

[0137] In addition, it should be noted that Figure 3 The structure of the electronic device shown in the figure does not constitute a limitation on the device. The actual device may include more or fewer components than shown, or may combine certain components, or arrange the components differently. In addition, the technical effects achieved by the electronic device when executing the method of the first embodiment can refer to the technical effects described in the first embodiment above, and therefore will not be repeated here.

[0138] Third embodiment

[0139] This embodiment provides a computer-readable storage medium storing at least one instruction, which is loaded and executed by a processor to implement the method of the first embodiment described above. The computer-readable storage medium may be a ROM, random access memory, CD-ROM, magnetic tape, floppy disk, or optical data storage device. The instructions stored therein can be loaded by a processor in a terminal to execute the method described above.

[0140] Furthermore, it should be noted that the present invention may be provided as a method, apparatus, or computer program product. Therefore, embodiments of the present invention may take the form of a fully or partially hardware embodiment, a fully or partially software embodiment, or an embodiment combining software and hardware aspects. Furthermore, when implemented using software, embodiments of the present invention may take the form of a computer program product implemented on one or more computer-usable storage media containing computer-usable program code. The computer program product comprises one or more computer instructions or computer programs. When the computer instructions or computer program are loaded or executed on a computer, the processes or functions described in accordance with the embodiments of the present invention are fully or partially generated. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via a wired connection (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium may be any available medium accessible by a computer or a data storage device such as a server or data center that contains a collection of one or more available media. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a DVD), or a semiconductor medium. The semiconductor medium may be a solid state drive.

[0141] The embodiments of the present invention are described with reference to the flowcharts and / or block diagrams of the methods, terminal devices (systems), and computer program products according to the embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of the processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, an embedded processor, or other programmable data processing terminal device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing terminal device generate instructions for implementing the process in the flowchart and / or block diagram. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0142] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing terminal device to operate in a specific manner, so that the instructions stored in the computer readable memory produce a manufactured product including an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1These computer program instructions can also be loaded onto a computer or other programmable data processing terminal device, so that a series of operation steps are executed on the computer or other programmable terminal device to produce a computer-implemented process, thereby providing instructions for implementing the process in the process. Figure 1 a process or multiple processes and / or boxes Figure 1 The steps for the function specified in one or more boxes.

[0143] It should also be noted that, in the present invention, relational terms such as first and second are merely used to distinguish one entity or operation from another, and do not necessarily require or imply any actual relationship or order between these entities or operations. The terms "include," "comprises," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or terminal device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article, or terminal device. Without further limitation, an element defined by the phrase "comprising a..." does not preclude the presence of other identical elements in the process, method, article, or terminal device comprising the element. In addition, the term "and / or" is merely a description of an associative relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, or B exists alone, where A and B can be singular or plural. In addition, in the present invention, the character " / " generally indicates that the objects before and after are in an "or" relationship, but it may also indicate an "and / or" relationship, which can be understood with reference to the context. "At least one" refers to one or more, and "more" refers to two or more. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, at least one of a, b or c can be represented by: a, b, c, ab, ac, bc, or abc, where a, b, c can be single or multiple.

[0144] In addition, it can be understood that in various embodiments of the present invention, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

[0145] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed in the present invention can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present invention.

[0146] In the several embodiments provided herein, it should be understood that the disclosed devices, apparatuses, and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of functional modules / units is merely a logical functional division. In actual implementation, other division methods may be used, such as multiple units or components being combined or integrated into another device, or some features being ignored or not implemented. Furthermore, the coupling or direct coupling or communication connection shown or discussed between each other may be through some interface, indirect coupling or communication connection between devices or units, and may be electrical, mechanical, or other forms. Units described as separate components may or may not be physically separate, and components shown as units may or may not be physical units, i.e., they may be located in one place or distributed across multiple network units. Some or all of the units may be selected to achieve the purpose of the present embodiment according to actual needs. In addition, the functional units in the various embodiments of the present invention may be integrated into a single processing unit, each unit may exist physically separately, or two or more units may be integrated into a single unit.

[0147] If the method is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0148] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention. It should be noted that, although preferred embodiments of the present invention have been described, those skilled in the art, once understanding the basic inventive concepts of the present invention, may make various improvements and modifications without departing from the principles of the present invention. Such improvements and modifications should also be considered within the scope of protection of the present invention. Therefore, the appended claims are intended to be interpreted as covering the preferred embodiments and all variations and modifications that fall within the scope of the embodiments of the present invention.

Claims

1. A method for tracking the position of a water beam mark in a hot rolling mill, characterized in that: The method comprises: (1) According to the size of the slab in the heating furnace, the number of water beams in contact with the slab, the diameter of the water beams in contact with the slab, and the spacing between the water beams are obtained; (2) Calculate the position of the water beam in contact with the slab along the length direction of the slab; (3) Calculate the length direction of the strip at the exit of each finishing rolling stand corresponding to the position of each water beam when the slab is heated in the heating furnace according to the finished slab size; (4) According to the cutting length of the slab head in the flying shear process before finishing rolling, the position of each water beam in the longitudinal direction of the strip rolled in each stand of finishing rolling is corrected; (5) Calculate the start and end time of each water beam position of the export strip passing through the rolling mill based on the rolling speed of each finishing rolling stand.

2. A method for tracking the position of a water beam mark in hot rolling finishing mill according to claim 1, characterized in that: In step (2), the formula for calculating the position of the water beam in contact with the slab in the longitudinal direction of the slab is: Where x(m) is the starting position of the m-th water beam printed on the slab in the heating furnace; x′(m) is the ending position of the m-th water beam printed on the slab in the heating furnace; L J is the length of the slab heated in the heating furnace; n is the number of water beam marks below the slab, n = 1, 2, 3...N, N is the total number of water beam marks below the slab; s is the distance between the center lines of the two water beam marks; d is the diameter of the water beam.

3. The method for tracking the position of the water beam mark of hot rolling finishing mill according to claim 1, characterized in that: Step (3) includes: The length of the strip rolled out of each finishing stand is calculated based on the slab heated in the heating furnace. The position of the water beam in contact with the slab in the heating furnace in the length direction of the slab is calculated based on the position of each water beam in the length direction of the strip at the outlet of each finishing stand.

4. A method for tracking the position of a water beam mark in hot rolling finishing mill according to claim 3, characterized in that: The length of the strip rolled out of each finishing rolling stand is calculated based on the slab heated in the heating furnace. The formula is: Among them, L Fi L is the length of the strip rolled out of the finishing rolling stand i; J h is the length of the heated slab in the heating furnace; J is the thickness of the heated slab in the heating furnace; w J h is the width of the heated slab in the heating furnace; Fi w is the thickness of the strip rolled out of the finishing rolling stand i; F It is the strip width at the outlet of the finishing mill stand.

5. The method for tracking the position of the water beam mark of hot rolling finishing mill according to claim 3, characterized in that: The formula for calculating the position of each water beam in the length direction of the strip at the outlet of each finishing mill stand is: Wherein, Fxi(m) is the starting position of the m-th water beam printed on the i-th stand of the finishing mill to roll out the strip; Fx′i(m) is the ending position of the m-th water beam printed on the i-th stand of the finishing mill to roll out the strip; L J h is the length of the heated slab in the heating furnace; J is the thickness of the heated slab in the heating furnace; w J h is the width of the heated slab in the heating furnace; Fi w is the thickness of the strip rolled out of the finishing rolling stand i; F is the strip width at the outlet of the finishing mill stand; s is the distance between the center lines of the two water beam marks; d is the diameter of the water beam.

6. The method for tracking the position of the water beam mark of hot rolling finishing mill according to claim 1, characterized in that: In step (4), the correction amount of the strip length at the outlet of each stand of the finishing rolling mill is calculated based on the crop length of the flying shear before finishing rolling. The calculation formula is: Among them, L Fi0 h is the correction amount of the cutting length of the flying shear before finishing rolling to the strip length at the outlet of each finishing stand; R h is the thickness of the intermediate billet entering the finishing mill; Fi L is the thickness of the strip rolled out of the finishing rolling stand i; C The cutting length of the flying shear.

7. A method for tracking the position of a water beam mark in hot rolling finishing mill according to claim 6, characterized in that: In step (4), the position of each water beam in the longitudinal direction of the strip rolled in each finishing rolling stand is corrected by the cut head length, and the calculation formula is: Wherein, Fxic(m) is the starting position of the mth water beam printed on the i-th stand of the finishing mill according to the trimming length; Fx′ic(m) is the ending position of the mth water beam printed on the i-th stand of the finishing mill according to the trimming length; L J is the length of the heated slab in the heating furnace; s is the distance between the center lines of the two water beam marks; d is the diameter of the water beam; h J is the thickness of the heated slab in the heating furnace; w J h is the width of the heated slab in the heating furnace; Fi w is the thickness of the strip rolled out of the finishing rolling stand i; F L is the strip width at the outlet of the finishing mill; Fi0 It is the correction amount of the strip length at the outlet of each finishing rolling stand based on the cutting length of the flying shear before finishing rolling.

8. A method for tracking the position of a water beam mark in hot rolling finishing mill according to claim 7, characterized in that: Step (5) includes: calculating the strip speed at the outlet of each finishing mill based on the rolling speed of each finishing mill stand and the forward slip of the strip; calculating the rolling time of each water beam mark passing through each finishing mill based on the starting position and ending position of each water beam mark at each finishing mill obtained by calculation in step (4).

9. A method for tracking the position of a water beam mark in hot rolling finishing mill according to claim 8, characterized in that: The formula for calculating the strip speed at the exit of each finishing mill is: v Fsi =v Fi ×(1+f Fi ) Among them, v Fsi v is the strip rolling speed of the finishing rolling stand i; Fi f is the linear speed of the rollers in the finishing rolling stand i; Fi It is the forward sliding of the exit strip of the finishing rolling stand i.

10. A method for tracking the position of a water beam mark in hot rolling finishing mill according to claim 9, characterized in that: The formula for calculating the rolling time of each water beam mark passing through each finishing mill is: Among them, T Fi(m) T′ is the time required for the finishing rolling stand i to pass the starting position of the mth water beam mark; Fi(m) is the time required for the finishing mill stand i to pass the end position of the mth water beam mark; Fxic(m) is the starting position of the mth water beam mark at the finishing mill stand i after the strip is rolled out, corrected according to the crop length; Fx′ic(m) is the end position of the mth water beam mark at the finishing mill stand i after the strip is rolled out, corrected according to the crop length; v Fsi is the strip rolling speed of the finishing rolling stand i.

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