A casting billet tracking method and system

Abstract

The present invention provides a method and system for tracking a casting blank, which comprises: firstly, dividing the continuous casting process of the casting blank into a plurality of sector units, and after the casting blank fills all the sector units, reading the position sensor data on each sector unit; then calculating the casting blank thickness at the driving roller position on each sector unit according to the position sensor data; then calculating the casting blank volume flux at the driving roller position on each sector unit, and screening out the casting blank volume flux that meets the preset conditions as the target casting blank volume flux; finally, calculating the casting blank length increment according to the target casting blank volume flux, and superimposing it with the casting blank length at the previous moment, and calculating the casting blank length at the current moment. The present invention can achieve the purpose of more accurately tracking the casting blank length by applying the signals of the existing equipment and sensors on the continuous casting machine without increasing the cost, thereby improving the accuracy of the control model and achieving the purpose of improving the casting blank quality.

Description

Technical Field

[0001] The invention relates to the technical field of metallurgy, and in particular to a casting billet tracking method and system. Background Art

[0002] Continuous casting is the process in which liquid steel is cooled and formed into a certain shape of ingot when passing through the guide devices such as the crystallizer and the sector unit, and is continuously pulled out of the sector unit at a certain speed by the drive roller. Among them, the tracking of the ingot length is related to the control accuracy of the process control model, such as the tracking of the liquid core of the ingot, the control of the spray cooling water, the control of the dynamic soft pressure, etc., which directly affects the quality of the continuous casting ingot product.

[0003] Traditionally, an encoder is added to the outlet of the terminal segment unit to track the casting length of the ingot. The encoder rotates synchronously with the corresponding segment unit drive motor and generates counting pulses respectively, which are converted into the length of the ingot for casting strand tracking. This solution is overly dependent on one motor and encoder, has poor accuracy and large accumulated errors, and is prone to tracking disorder or even loss of tracking target, which is very dangerous during the casting process.

[0004] In view of the above technical problems, although the prior art proposes a casting stream tracking scheme for continuous casting machines, it still has the following defects: it does not consider the influence of the roller gap opening of different sector units on the driving roller speed, that is, the influence of the thickness of the billet at different positions on the driving roller speed. According to the principle of mass conservation, the mass flux of the billet in each sector unit of the continuous casting machine is equal. Since the billet thickness of each sector unit is different, the billet speed in each sector unit and the billet length increment per unit time are also different. It is not accurate to directly convert the driving roller encoder pulse into the billet length increment, resulting in a deviation between the tracking value of the billet length and the actual value of the billet length, and the deviation gradually accumulates with the continuous production and becomes larger and larger; it will also directly affect the accuracy of the process control model, such as the liquid core tracking of the billet, the control of the spray cooling water, the control of the dynamic light pressure, etc., thereby affecting the smoothness of the continuous casting production and the quality of the casting products. Summary of the invention

[0005] In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide a casting billet tracking method and system for solving the technical problems existing in the prior art.

[0006] To achieve the above-mentioned object and other related objects, the present invention provides a casting billet tracking method, comprising the following steps:

[0007] The continuous casting process of the ingot is divided into a plurality of sector units, and after the ingot fills all the sector units, the position sensor data on each sector unit is read;

[0008] Calculate the thickness of the casting at the driving roller position of each sector unit according to the position sensor data;

[0009] The billet volume flux at the driving roller position on each sector unit is calculated based on the billet thickness at the driving roller position, and the billet volume flux that meets the preset conditions is screened out as the target billet volume flux;

[0010] The length increment of the casting billet is calculated according to the target casting billet volume flux, and the length increment of the casting billet is superimposed on the casting billet length at the previous moment to calculate the casting billet length at the current moment.

[0011] Optionally, if four position sensors are provided on each segment unit, the process of calculating the thickness of the casting at the driving roller position on each segment unit according to the position sensor data includes:

[0012] Get the data corresponding to the four position sensors on the i-th sector unit, and record them as the first position sensor data Second position sensor data Third position sensor data and the fourth position sensor data

[0013] According to the first position sensor data Second position sensor data Third position sensor data and the fourth position sensor data Calculate the strand thickness at the driving roller position on each segment unit:

[0014] In the formula, i represents the sector unit number, the value of i ranges from 1 to n, and n is the maximum value of the sector unit number;

[0015] h i It represents the thickness of the casting strand at the driving roller position on the i-th segment unit.

[0016] Optionally, the process of calculating the strand volume flux at the driving roller position on each segment unit based on the strand thickness at the driving roller position includes:

[0017] Get the linear velocity of the driving roller fed back by the encoder on the i-th sector unit, denoted as v i ;

[0018] According to the linear velocity of the driving roller fed back by the encoder on the i-th segment unit, the thickness and width of the casting billet at the driving roller position on the i-th segment unit, the casting billet volume flux at the driving roller position on the i-th segment unit is calculated as follows:

[0019] Vi =h i wv i ;

[0020] Where V i represents the strand volume flux at the driving roller position on the i-th segment unit;

[0021] w represents the width of the casting billet;

[0022] h i It represents the thickness of the casting strand at the driving roller position on the i-th segment unit.

[0023] Optionally, the process of calculating the billet volume flux at the driving roller position on each sector unit based on the billet thickness at the driving roller position, and selecting the billet volume flux meeting the preset conditions as the target billet volume flux includes:

[0024] Obtaining the strand volume flux at the driving roller position on each segment unit;

[0025] The sector segment unit casting volume flux corresponding to the maximum casting volume flux is filtered out from all casting volume fluxes; and the sector segment unit casting volume flux corresponding to the minimum casting volume flux is filtered out from all casting volume fluxes; and the remaining casting volume flux after filtering is used as the target casting volume flux.

[0026] Optionally, the process of calculating the length increment of the casting strand according to the target casting strand volume flux comprises:

[0027] The average volume flux of the casting billet is calculated according to the target casting billet volume flux, as follows:

[0028] Select the segment unit closest to the continuous casting machine outlet among the remaining segment units, and record it as segment unit k;

[0029] Get the average value of the position sensor at the outlet of the sector unit k, and we have:

[0030] According to the average value of the position sensor at the outlet of the sector unit k, the width of the casting strand and the average volume flux of the casting strand, the length increment of the casting strand is calculated as follows:

[0031] In the formula, It represents the average volume flux of the casting billet;

[0032] Δl represents the increment of the length of the casting billet;

[0033] t represents the calculation period.

[0034] Optionally, the process of superimposing the billet length increment with the billet length at the previous moment to calculate the billet length at the current moment includes:

[0035] Get the length of the last moment, recorded as l t-1 ;

[0036] The billet length increment is superimposed on the billet length at the previous moment to calculate the billet length at the current moment: t = l t-1 +Δl;

[0037] In the formula, l t Indicates the length of the billet at the current moment.

[0038] The present invention also provides a casting billet tracking system, the system comprising:

[0039] A segmentation module is used to divide the continuous casting process of the ingot into multiple sector units;

[0040] A data acquisition module is used to read the position sensor data on each sector unit after the billet fills all the sector units;

[0041] A slab thickness module, used for calculating the slab thickness at the driving roller position on each sector unit according to the position sensor data;

[0042] The slab volume flux module is used to calculate the slab volume flux at the driving roller position on each sector unit according to the slab thickness at the driving roller position, and screen out the slab volume flux that meets the preset conditions as the target slab volume flux;

[0043] The billet tracking module is used to calculate the billet length increment according to the target billet volume flux, and superimpose the billet length increment with the billet length at the previous moment to calculate the billet length at the current moment.

[0044] Optionally, the sector unit further comprises: an upper frame, a lower frame and a hydraulic cylinder, wherein the upper frame and the lower frame are provided with a driving roller and an automatic roller for supporting and guiding;

[0045] The driving roller is driven by a driving motor and is used to drive the casting billet to leave the fan-shaped segment;

[0046] The driving motor is provided with an encoder, and the encoder is used to measure the linear velocity of the driving roller.

[0047] Optionally, one or two driving rollers are provided in the upper frame, and the rest are free rollers;

[0048] The lower frame is provided with one or two driving rollers, and the rest are free rollers.

[0049] Optionally, the segmentation module divides the continuous casting process of the ingot into at least three sector units.

[0050] As described above, the present invention provides a method and system for tracking a casting billet, which has the following beneficial effects: the present invention first divides the continuous casting process of the casting billet into a plurality of sector units, and after the casting billet fills all the sector units, reads the position sensor data on each sector unit; then calculates the casting billet thickness at the driving roller position on each sector unit according to the position sensor data; then calculates the casting billet volume flux at the driving roller position on each sector unit based on the casting billet thickness at the driving roller position, and selects the casting billet volume flux that meets the preset conditions as the target casting billet volume flux; finally, calculates the casting billet length increment according to the target casting billet volume flux, and superimposes the casting billet length increment with the casting billet length at the previous moment to calculate the casting billet length at the current moment. It can be seen from this that the present invention can achieve the purpose of more accurately tracking the casting billet length by applying the signals of the existing equipment and sensors on the continuous casting machine without increasing the cost, thereby improving the accuracy of the control model, such as the liquid core tracking accuracy of the casting billet, the control accuracy of the spray cooling water, and the control accuracy of the dynamic soft pressure, and finally achieves the purpose of improving the casting billet quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 A schematic diagram of a process flow of a casting slab tracking method provided in one embodiment of the present invention;

[0052] Figure 2 A schematic diagram of a continuous casting machine roller array provided in one embodiment of the present invention;

[0053] Figure 3 A schematic diagram of the hardware structure of a casting billet tracking system provided in one embodiment of the present invention. DETAILED DESCRIPTION

[0054] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0055] It should be noted that the illustrations provided in this embodiment are only used to illustrate the basic concept of the present invention in a schematic manner. Therefore, the drawings only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0056] See also Figure 1 As shown, this embodiment provides a casting billet tracking method, comprising the following steps:

[0057] S110, dividing the continuous casting process of the ingot into a plurality of sector units, and after the ingot fills all the sector units, reading the position sensor data on each sector unit;

[0058] S120, calculating the thickness of the casting at the driving roller position of each sector unit according to the position sensor data;

[0059] S130, calculating the billet volume flux at the driving roller position on each sector unit based on the billet thickness at the driving roller position, and screening out the billet volume flux that meets the preset conditions as the target billet volume flux;

[0060] S140, calculating the length increment of the casting billet according to the target casting billet volume flux, and superimposing the casting billet length increment with the casting billet length at the previous moment to calculate the casting billet length at the current moment.

[0061] It can be seen from this that, without increasing costs, this embodiment can achieve the purpose of more accurately tracking the length of the ingot by applying the signals of existing equipment and sensors on the continuous casting machine, thereby improving the accuracy of the control model, such as the tracking accuracy of the liquid core of the ingot, the control accuracy of the spray cooling water, and the control accuracy of dynamic light pressure, thereby ultimately achieving the purpose of improving the quality of the ingot.

[0062] In an exemplary embodiment, if four position sensors are provided on each segment unit, the process of calculating the thickness of the casting at the driving roller position on each segment unit according to the position sensor data includes: obtaining the data corresponding to the four position sensors on the i-th segment unit, and recording them as the first position sensor data and the second position sensor data. Second position sensor data Third position sensor data and the fourth position sensor data According to the first position sensor data Second position sensor data Third position sensor data and the fourth position sensor data Calculate the strand thickness at the driving roller position on each segment unit: Where i represents the number of the fan segment unit, and the value of i ranges from 1 to n, where n is the maximum value of the fan segment unit number; h i represents the thickness of the slab at the driving roller position on the i-th segment unit. As an example, Figure 2The continuous casting machine roller array shown in the figure, in this embodiment, the four position sensor data can be set at the left entrance value Right entry value Left exit value and the right exit value

[0063] In an exemplary embodiment, the process of calculating the strand volume flux at the driving roller position on each segment unit based on the strand thickness at the driving roller position includes: obtaining the linear velocity of the driving roller fed back by the encoder on the i-th segment unit, denoted as v i ; According to the linear velocity of the driving roller fed back by the encoder on the i-th segment unit, the thickness and width of the casting billet at the driving roller position on the i-th segment unit, the volume flux of the casting billet at the driving roller position on the i-th segment unit is calculated, and: V i =h i wv i ; Where V i represents the strand volume flux at the driving roller position on the i-th segment unit; w represents the strand width; h i represents the thickness of the casting billet at the driving roller position on the i-th sector unit. As an example, in this embodiment, the casting billet volume flux V i The unit is mm 3 / min; the unit of the billet width w is mm; the linear speed v of the driving roller fed back by the encoder on the i-th sector unit i The unit is mm / min.

[0064] In an exemplary embodiment, the process of calculating the billet volume flux at the driving roller position on each sector unit based on the billet thickness at the driving roller position, and screening out the billet volume flux that meets the preset conditions as the target billet volume flux includes: obtaining the billet volume flux at the driving roller position on each sector unit; filtering out the billet volume flux of the sector unit corresponding to the maximum billet volume flux from all billet volume fluxes; and filtering out the billet volume flux of the sector unit corresponding to the minimum billet volume flux from all billet volume fluxes; and using the remaining billet volume flux after filtering as the target billet volume flux. As an example, when screening the billet volume flux that meets the preset conditions, the present embodiment may discard the data with excessive deviation of the sector volume flux. For example, the sector data with the largest and smallest volume fluxes are discarded, and then the remaining volume flux data is n-2 volume flux data after discarding the largest and smallest volume fluxes.

[0065] In an exemplary embodiment, the process of calculating the length increment of the casting strand according to the target casting strand volume flux includes: calculating the average casting strand volume flux according to the target casting strand volume flux, as follows: The sector unit closest to the continuous casting machine outlet among the remaining sector units is selected and recorded as sector unit k; the average value of the position sensor at the outlet of sector unit k is obtained, and: According to the average value of the position sensor at the outlet of the sector unit k, the width of the casting strand and the average volume flux of the casting strand, the length increment of the casting strand is calculated as follows: In the formula, represents the average volume flux of the casting billet; Δl represents the increment of casting billet length; t represents the calculation period.

[0066] In an exemplary embodiment, the process of superimposing the billet length increment with the billet length at the previous moment to calculate the billet length at the current moment includes: obtaining the billet length at the previous moment, recorded as l t-1 ; The billet length increment is superimposed on the billet length at the previous moment, and the billet length at the current moment is calculated, and: l t = l t-1 +Δl; where l t Indicates the length of the billet at the current moment.

[0067] In another exemplary embodiment of the present invention, the embodiment further provides a continuous casting tracking method, comprising the following steps:

[0068] S1: Divide the continuous casting process of the ingot into multiple sector units, and after the ingot fills all the sector units, read the position sensor data corresponding to the four position sensors on each sector unit. As an example, in this embodiment, the number of the multiple sector units is not less than 3, and the sector unit includes hardware devices such as an upper frame, a lower frame, a hydraulic cylinder, and a position sensor; the upper frame and the lower frame include multiple rollers for supporting and guiding, wherein the rollers of the upper frame and the lower frame include 1 or 2 drive rollers, and the others are free rollers. The drive roller drives the ingot out of the sector, and the drive roller is driven by a drive motor, and an encoder is installed on the drive motor to measure the linear velocity of the drive roller.

[0069] S2: Calculate the thickness of the casting at each sector drive roller position; Specifically, if the four position sensor data are the left inlet values Right entry value Left exit value Right side exit value Where i is the sector number, ranging from 1 to n, where n is the maximum value of the sector number; then calculate the thickness of the casting at the driving roller position h i The formula is

[0070] S3: Calculate the casting volume flux at the driving roller position; as an example, the calculated casting volume flux V i , unit is mm3 / min, preferably, V i =h i wv i , where w is the width of the billet in mm, v i It is the linear speed of the driving roller according to the encoder feedback, in mm / min.

[0071] S4: discard the data with too large deviation of the volume flux of the sector, and reversely calculate the length increment of the casting billet according to the remaining volume flux data; as an example, in this embodiment, when discarding the data with too large deviation of the volume flux of the sector, it is preferred to discard the data of the sector with the largest and smallest volume fluxes, and then the remaining volume flux data is the n-2 volume flux data after discarding the largest and smallest volume fluxes. The process of reversely calculating the length increment of the casting billet can be: first calculate the average volume flux Then select the sector k closest to the continuous casting machine outlet among the remaining n-2 sectors, and obtain the average value of the position sensor at the sector outlet: The length increment of the billet can be calculated as Where t is the calculation period.

[0072] S5: Accumulate the incremental length to obtain the real-time length of the billet. For example, obtain the billet length l at the last moment t-1 Then the billet length increment is superimposed on the billet length at the previous moment to calculate the billet length at the current moment. t = l t-1 +Δl, where l t-1 is the length of the billet at the last moment, l t is the length of the billet at the current moment.

[0073] In a specific example, Figure 2 Taking the continuous casting machine with the roller array shown as an example, a continuous casting tracking method is provided. Figure 2 There are 13 sector units in the continuous casting process. In the continuous casting process, the production section is 1650mm wide and 230mm thick. When the billet fills all the sectors, the continuous casting tracking method includes the following steps:

[0074] 1) Read the data of the four position sensors of each sector, as shown in Table 1 below.

[0075] Table 1 Data of 4 position sensors on each sector

[0076] Segment ID Inlet left cylinder mm Inlet right cylinder mm Outlet left cylinder mm Outlet right cylinder mm 1 240.88 240.98 240.11 240.24 2 239.98 240.00 239.21 239.50 3 239.08 239.17 238.31 238.44 4 238.17 238.40 237.41 237.51 5 237.27 237.53 236.51 236.62 6 236.44 236.63 236.08 236.24 7 236.02 236.30 235.69 235.89 8 235.64 235.84 235.31 235.51 9 235.25 235.37 234.92 235.11 10 234.87 235.16 234.54 234.73 11 234.48 234.54 234.15 234.25 12 234.10 234.34 233.77 233.93 13 233.71 233.76 233.38 233.51 14 233.33 233.36 233.00 233.13

[0077] 2) Calculate the thickness h of the casting at the driving roller position of each sector i , billet thickness h i Calculation method such as: The calculated slab thickness at the driving roller position of each sector is shown in Table 2 below.

[0078] Table 2 Driving roller position of each sector casting thickness

[0079] Segment ID Driving roller position slab thickness mm 1 241.31 2 240.31 3 239.50 4 238.70 5 237.82 6 236.72 7 236.35 8 235.91 9 235.46 10 235.21 11 234.67 12 234.41 13 233.88 14 233.49

[0080] 3) Calculate the volume flux of the casting at the driving roller position, the calculation formula is V i =h i wv i , and then the volume flux of the casting billet at the driving roller position of each sector is obtained as shown in Table 3 below.

[0081] Table 3 Volume flux of the strand at each segment drive roller position

[0082] Segment ID Driving roller linear speed mm / s Driving roller position Casting volume flux mm3 / min 1 21.79 8454632.91 2 21.94 8467131.73 3 21.71 8519985.51 4 22.12 8522350.40 5 21.94 8522622.09 6 22.07 8536839.62 7 21.75 8596255.69 8 21.89 8620265.56 9 22.37 8661100.95 10 22.41 8723995.90 11 22.43 8745564.80 12 22.49 8783096.40 13 22.43 8893201.38 14 22.44 8932627.91

[0083] 4) Discarding the data with too large deviation of the sector volume flux, preferably, discarding the sector data with the largest and smallest volume flux. The remaining volume flux data are n-2 volume flux data after discarding the maximum volume flux of sector 1 and the minimum volume flux of sector 10. The reverse calculation of the billet length increment first calculates the average volume flux The calculated result is 8632700.8mm 3 / s, then select the sector 14 closest to the continuous casting machine outlet among the remaining n-2 sectors, and obtain the average value of the position sensor at the sector outlet: The result is 233.05 mm, so the length increment of the ingot can be calculated. The result is 22.45mm, and the calculation period t here is 1s.

[0084] 5) Accumulate the incremental length to obtain the real-time length of the ingot; t = l t-1 +Δl, the length of the billet in the previous calculation cycle l t-1 is 12500mm, then the length of the billet in this calculation cycle is l t It is 12522.45mm.

[0085] It can be seen from this that, without increasing costs, this embodiment can achieve the purpose of more accurately tracking the length of the ingot by applying the signals of existing equipment and sensors on the continuous casting machine, thereby improving the accuracy of the control model, such as the tracking accuracy of the liquid core of the ingot, the control accuracy of the spray cooling water, and the control accuracy of dynamic light pressure, thereby ultimately achieving the purpose of improving the quality of the ingot.

[0086] In summary, the present invention provides a method for tracking a casting billet, firstly, the continuous casting process of the casting billet is divided into a plurality of sector units, and after the casting billet fills all the sector units, the position sensor data on each sector unit is read; then, the casting billet thickness at the driving roller position on each sector unit is calculated according to the position sensor data; then, the casting billet volume flux at the driving roller position on each sector unit is calculated based on the casting billet thickness at the driving roller position, and the casting billet volume flux that meets the preset conditions is screened out as the target casting billet volume flux; finally, the casting billet length increment is calculated according to the target casting billet volume flux, and the casting billet length increment is superimposed with the casting billet length at the previous moment to calculate the casting billet length at the current moment. It can be seen from this that, without increasing the cost, the method can achieve the purpose of more accurately tracking the casting billet length by applying the signals of the existing equipment and sensors on the continuous casting machine, thereby improving the accuracy of the control model, such as the liquid core tracking accuracy of the casting billet, the control accuracy of the spray cooling water, and the control accuracy of the dynamic soft pressure, and finally achieve the purpose of improving the casting billet quality.

[0087] like Figure 3 As shown, the present invention also provides a casting billet tracking system, the system comprising:

[0088] The segmentation module 310 is used to divide the continuous casting process of the ingot into a plurality of sector units. As an example, the continuous casting process of the ingot can be divided into three sector units in this embodiment.

[0089] The data acquisition module 320 is used to read the position sensor data on each sector unit after the casting billet fills all the sector units;

[0090] A casting strand thickness module 330, for calculating the casting strand thickness at the driving roller position on each sector unit according to the position sensor data;

[0091] The slab volume flux module 340 is used to calculate the slab volume flux at the driving roller position on each sector unit according to the slab thickness at the driving roller position, and select the slab volume flux that meets the preset conditions as the target slab volume flux;

[0092] The billet tracking module 350 is used to calculate the billet length increment according to the target billet volume flux, and to superimpose the billet length increment with the billet length at the previous moment to calculate the billet length at the current moment.

[0093] It can be seen from this that, without increasing costs, this embodiment can achieve the purpose of more accurately tracking the length of the ingot by applying the signals of existing equipment and sensors on the continuous casting machine, thereby improving the accuracy of the control model, such as the tracking accuracy of the liquid core of the ingot, the control accuracy of the spray cooling water, and the control accuracy of dynamic light pressure, thereby ultimately achieving the purpose of improving the quality of the ingot.

[0094] In an exemplary embodiment, the sector unit further comprises: an upper frame, a lower frame and a hydraulic cylinder, wherein the upper frame and the lower frame are provided with driving rollers and automatic rollers for supporting and guiding; the driving rollers are driven by a driving motor and are used to drive the casting to leave the sector; an encoder is provided on the driving motor, and the encoder is used to measure the linear velocity of the driving roller. Among them, one or two driving rollers are provided in the upper frame, and the rest are free rollers; one or two driving rollers are provided in the lower frame, and the rest are free rollers.

[0095] In an exemplary embodiment, if four position sensors are provided on each segment unit, the process of calculating the thickness of the casting at the driving roller position on each segment unit according to the position sensor data includes: obtaining the data corresponding to the four position sensors on the i-th segment unit, and recording them as the first position sensor data and the second position sensor data. Second position sensor data Third position sensor data and the fourth position sensor data According to the first position sensor data Second position sensor data Third position sensor data and the fourth position sensor data Calculate the strand thickness at the driving roller position on each segment unit: Where i represents the number of the fan segment unit, and the value of i ranges from 1 to n, where n is the maximum value of the fan segment unit number; h i represents the thickness of the slab at the driving roller position on the i-th segment unit. As an example, Figure 2 The continuous casting machine roller array shown in the figure, in this embodiment, the four position sensor data can be set at the left entrance value Right entry value Left exit value and the right exit value

[0096] In an exemplary embodiment, the process of calculating the strand volume flux at the driving roller position on each segment unit based on the strand thickness at the driving roller position includes: obtaining the linear velocity of the driving roller fed back by the encoder on the i-th segment unit, denoted as v i ; According to the linear velocity of the driving roller fed back by the encoder on the i-th segment unit, the thickness and width of the casting billet at the driving roller position on the i-th segment unit, the volume flux of the casting billet at the driving roller position on the i-th segment unit is calculated, and: V i =h i wv i ; Where V irepresents the strand volume flux at the driving roller position on the i-th segment unit; w represents the strand width; h i represents the thickness of the casting billet at the driving roller position on the i-th sector unit. As an example, in this embodiment, the casting billet volume flux V i The unit is mm 3 / min; the unit of the billet width w is mm; the linear speed v of the driving roller fed back by the encoder on the i-th sector unit i The unit is mm / min.

[0097] In an exemplary embodiment, the process of calculating the billet volume flux at the driving roller position on each sector unit based on the billet thickness at the driving roller position, and screening out the billet volume flux that meets the preset conditions as the target billet volume flux includes: obtaining the billet volume flux at the driving roller position on each sector unit; filtering out the billet volume flux of the sector unit corresponding to the maximum billet volume flux from all billet volume fluxes; and filtering out the billet volume flux of the sector unit corresponding to the minimum billet volume flux from all billet volume fluxes; and using the remaining billet volume flux after filtering as the target billet volume flux. As an example, when screening the billet volume flux that meets the preset conditions, the present embodiment may discard the data with excessive deviation of the sector volume flux. For example, the sector data with the largest and smallest volume fluxes are discarded, and then the remaining volume flux data is n-2 volume flux data after discarding the largest and smallest volume fluxes.

[0098] In an exemplary embodiment, the process of calculating the length increment of the casting strand according to the target casting strand volume flux includes: calculating the average casting strand volume flux according to the target casting strand volume flux, as follows: The sector unit closest to the continuous casting machine outlet among the remaining sector units is selected and recorded as sector unit k; the average value of the position sensor at the outlet of sector unit k is obtained, and: According to the average value of the position sensor at the outlet of the sector unit k, the width of the casting strand and the average volume flux of the casting strand, the length increment of the casting strand is calculated as follows: In the formula, represents the average volume flux of the casting billet; Δl represents the increment of casting billet length; t represents the calculation period.

[0099] In an exemplary embodiment, the process of superimposing the billet length increment with the billet length at the previous moment to calculate the billet length at the current moment includes: obtaining the billet length at the previous moment, recorded as l t-1 ; The billet length increment is superimposed on the billet length at the previous moment, and the billet length at the current moment is calculated, and: l t = l t-1 +Δl; where l t Indicates the length of the billet at the current moment.

[0100] In another exemplary embodiment of the present invention, the embodiment further provides a continuous casting tracking method, comprising the following steps:

[0101] S1: Divide the continuous casting process of the ingot into multiple sector units, and after the ingot fills all the sector units, read the position sensor data corresponding to the four position sensors on each sector unit. As an example, in this embodiment, the number of the multiple sector units is not less than 3, and the sector unit includes hardware devices such as an upper frame, a lower frame, a hydraulic cylinder, and a position sensor; the upper frame and the lower frame include multiple rollers for supporting and guiding, wherein the rollers of the upper frame and the lower frame include 1 or 2 drive rollers, and the others are free rollers. The drive roller drives the ingot out of the sector, and the drive roller is driven by a drive motor, and an encoder is installed on the drive motor to measure the linear velocity of the drive roller.

[0102] S2: Calculate the thickness of the casting at each sector drive roller position; Specifically, if the four position sensor data are the left inlet values Right entry value Left exit value Right side exit value Where i is the sector number, ranging from 1 to n, where n is the maximum value of the sector number; then calculate the thickness of the casting at the driving roller position h i The formula is

[0103] S3: Calculate the casting volume flux at the driving roller position; as an example, the calculated casting volume flux V i , unit is mm 3 / min, preferably, V i =h i wv i , where w is the width of the billet in mm, v i It is the linear speed of the driving roller according to the encoder feedback, in mm / min.

[0104] S4: discard the data with too large deviation of the volume flux of the sector, and reversely calculate the length increment of the casting billet according to the remaining volume flux data; as an example, in this embodiment, when discarding the data with too large deviation of the volume flux of the sector, it is preferred to discard the data of the sector with the largest and smallest volume fluxes, and then the remaining volume flux data is the n-2 volume flux data after discarding the largest and smallest volume fluxes. The process of reversely calculating the length increment of the casting billet can be: first calculate the average volume flux Then select the sector k closest to the continuous casting machine outlet among the remaining n-2 sectors, and obtain the average value of the position sensor at the sector outlet: The length increment of the billet can be calculated as Where t is the calculation period.

[0105] S5: Accumulate the incremental length to obtain the real-time length of the billet. For example, obtain the billet length l at the last moment t-1 Then the billet length increment is superimposed on the billet length at the previous moment to calculate the billet length at the current moment. t = l t-1 +Δl, where l t-1 is the length of the billet at the last moment, l t is the length of the billet at the current moment.

[0106] In summary, the present invention provides a billet tracking system, which first divides the continuous casting process of the billet into a plurality of sector units, and after the billet fills all the sector units, reads the position sensor data on each sector unit; then calculates the billet thickness at the driving roller position on each sector unit according to the position sensor data; then calculates the billet volume flux at the driving roller position on each sector unit based on the billet thickness at the driving roller position, and selects the billet volume flux that meets the preset conditions as the target billet volume flux; finally calculates the billet length increment according to the target billet volume flux, and superimposes the billet length increment with the billet length at the previous moment to calculate the billet length at the current moment. It can be seen that the system can achieve the purpose of more accurate tracking of the billet length without increasing the cost by applying the signals of the existing equipment and sensors on the continuous casting machine, thereby improving the accuracy of the control model, such as the liquid core tracking accuracy of the billet, the control accuracy of the spray cooling water, and the control accuracy of the dynamic soft pressure, and finally achieves the purpose of improving the billet quality.

[0107] It should be noted that the billet tracking system provided in the above embodiment and the billet tracking method provided in the above embodiment belong to the same concept, wherein the specific manner in which each module and unit performs the operation has been described in detail in the method embodiment, and will not be repeated here. In practical applications, the billet tracking system provided in the above embodiment can allocate the above functions to different functional modules as needed, that is, divide the internal structure of the system into different functional modules to complete all or part of the functions described above, which is not limited here. Therefore, the present invention effectively overcomes various shortcomings in the prior art and has a high industrial utilization value.

[0108] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

[0109] The structures, proportions, sizes, etc. illustrated in the drawings in this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change of the proportion relationship or adjustment of the size, without affecting the effects and purposes that can be achieved by the present invention, should still fall within the scope of the technical content disclosed by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. The change or adjustment of their relative relationship should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0110] It should be understood that, although the terms first, second, third, etc. may be used to describe preset ranges, etc. in the embodiments of the present invention, these preset ranges should not be limited to these terms. These terms are only used to distinguish preset ranges from each other. For example, without departing from the scope of the embodiments of the present invention, the first preset range may also be referred to as the second preset range, and similarly, the second preset range may also be referred to as the first preset range.

Claims

1. A method for tracking a casting billet, characterized in that: The method comprises the following steps: The continuous casting process of the ingot is divided into a plurality of sector units, and after the ingot fills all the sector units, the position sensor data on each sector unit is read; Calculate the thickness of the casting at the driving roller position of each sector unit according to the position sensor data; The billet volume flux at the driving roller position on each sector unit is calculated based on the billet thickness at the driving roller position, and the billet volume flux that meets the preset conditions is screened out as the target billet volume flux; Calculating a length increment of the casting billet according to the target casting billet volume flux, and superimposing the length increment of the casting billet with the casting billet length at the previous moment to calculate the casting billet length at the current moment; The process of calculating the billet volume flux at the driving roller position on each sector unit based on the billet thickness at the driving roller position and selecting the billet volume flux that meets the preset conditions as the target billet volume flux includes: obtaining the linear velocity of the driving roller fed back by the encoder on the i-th sector unit, denoted as v i ; According to the linear velocity of the driving roller fed back by the encoder on the i-th segment unit, the thickness and width of the casting billet at the driving roller position on the i-th segment unit, the volume flux of the casting billet at the driving roller position on the i-th segment unit is calculated, and: V i =h i wv i ; Where V i represents the strand volume flux at the driving roller position on the i-th segment unit; w represents the strand width; h i represents the thickness of the casting billet at the driving roller position on the i-th sector unit; and, obtains the casting billet volume flux at the driving roller position on each sector unit; filters out the sector unit casting billet volume flux corresponding to the maximum casting billet volume flux from all casting billet volume fluxes; and, filters out the sector unit casting billet volume flux corresponding to the minimum casting billet volume flux from all casting billet volume fluxes; and uses the remaining casting billet volume flux after filtering as the target casting billet volume flux; The process of calculating the length increment of the casting billet according to the target casting billet volume flux comprises: calculating the average casting billet volume flux according to the target casting billet volume flux, which is: The sector unit closest to the continuous casting machine outlet among the remaining sector units is selected and recorded as sector unit k; the average value of the position sensor at the outlet of sector unit k is obtained, and: According to the average value of the position sensor at the outlet of the sector unit k, the width of the casting strand and the average volume flux of the casting strand, the length increment of the casting strand is calculated as follows: In the formula, represents the average volume flux of the casting billet; Δl represents the increment of casting billet length; t represents the calculation period.

2. The method for tracking the casting strand according to claim 1, characterized in that: If four position sensors are provided on each segment unit, the process of calculating the thickness of the casting strand at the driving roller position on each segment unit according to the position sensor data includes: Get the data corresponding to the four position sensors on the i-th sector unit, and record them as the first position sensor data Second position sensor data Third position sensor data and the fourth position sensor data According to the first position sensor data Second position sensor data Third position sensor data and the fourth position sensor data Calculate the strand thickness at the driving roller position on each segment unit: In the formula, i represents the sector unit number, the value of i ranges from 1 to n, and n is the maximum value of the sector unit number; h i It represents the thickness of the casting strand at the driving roller position on the i-th segment unit.

3. The casting strand tracking method according to claim 1 or 2, characterized in that: The process of superimposing the billet length increment with the billet length at the previous moment to calculate the billet length at the current moment includes: Get the length of the last moment, recorded as l t-1 ; The billet length increment is superimposed on the billet length at the previous moment to calculate the billet length at the current moment: t = l t-1 +Δl; In the formula, l t Indicates the length of the billet at the current moment.

4. A casting billet tracking system, characterized in that: The system comprises: A segmentation module is used to divide the continuous casting process of the ingot into multiple sector units; A data acquisition module is used to read the position sensor data on each sector unit after the billet fills all the sector units; A slab thickness module, used for calculating the slab thickness at the driving roller position on each sector unit according to the position sensor data; The slab volume flux module is used to calculate the slab volume flux at the driving roller position on each sector unit according to the slab thickness at the driving roller position, and screen out the slab volume flux that meets the preset conditions as the target slab volume flux; A casting slab tracking module, used for calculating the casting slab length increment according to the target casting slab volume flux, and superimposing the casting slab length increment with the casting slab length at the previous moment to calculate the casting slab length at the current moment; The billet volume flux module calculates the billet volume flux at the driving roller position on each sector unit according to the billet thickness at the driving roller position, and selects the billet volume flux that meets the preset conditions as the target billet volume flux. The process includes: obtaining the linear velocity of the driving roller fed back by the encoder on the i-th sector unit, denoted as v i ; According to the linear velocity of the driving roller fed back by the encoder on the i-th segment unit, the thickness and width of the casting billet at the driving roller position on the i-th segment unit, the volume flux of the casting billet at the driving roller position on the i-th segment unit is calculated, and: V i =h i wv i ; Where V i represents the strand volume flux at the driving roller position on the i-th segment unit; w represents the strand width; h i represents the thickness of the casting billet at the driving roller position on the i-th sector unit; and, obtains the casting billet volume flux at the driving roller position on each sector unit; filters out the sector unit casting billet volume flux corresponding to the maximum casting billet volume flux from all casting billet volume fluxes; and, filters out the sector unit casting billet volume flux corresponding to the minimum casting billet volume flux from all casting billet volume fluxes; and uses the remaining casting billet volume flux after filtering as the target casting billet volume flux; The process of calculating the length increment of the casting billet according to the target casting billet volume flux by the casting billet tracking module includes: calculating the average casting billet volume flux according to the target casting billet volume flux, which includes: The sector unit closest to the continuous casting machine outlet among the remaining sector units is selected and recorded as sector unit k; the average value of the position sensor at the outlet of sector unit k is obtained, and: According to the average value of the position sensor at the outlet of the sector unit k, the width of the casting strand and the average volume flux of the casting strand, the length increment of the casting strand is calculated as follows: In the formula, represents the average volume flux of the casting billet; Δl represents the increment of casting billet length; t represents the calculation period.

5. The casting strand tracking system according to claim 4, characterized in that: The sector unit further comprises: an upper frame, a lower frame and a hydraulic cylinder, wherein the upper frame and the lower frame are provided with a driving roller and an automatic roller for supporting and guiding; The driving roller is driven by a driving motor and is used to drive the casting billet to leave the fan-shaped segment; The driving motor is provided with an encoder, and the encoder is used to measure the linear velocity of the driving roller.

6. The casting strand tracking system according to claim 5, characterized in that: The upper frame is provided with one or two driving rollers, and the rest are free rollers; The lower frame is provided with one or two driving rollers, and the rest are free rollers.

7. The casting strand tracking system according to any one of claims 4 to 6, characterized in that: The segmentation module divides the continuous casting process of the ingot into at least three segment units.

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