Upper cooling bed double-length adjusting method and device and storage medium

Abstract

The invention discloses an upper cooling bed multiple-length adjusting method and device and a storage medium, and belongs to the technical field of cooling bed multiple-length calculation. The calculation method comprises the steps that the number of brake plates, the length of the brake plates and the cold shrinkage rate are obtained, and the actual multiple-length length is calculated according to the number of the brake plates, the length of the brake plates and the cold shrinkage rate; dividing the actual double-length length by the fixed-length length, and taking an integer downwards to obtain a segment number; calculating a residual margin according to the actual double-length length, the fixed-length length and the segment number; cutting processes are obtained, and allowance threshold values are obtained according to the different cutting processes; and comparing the residual allowance with an allowance threshold value, judging whether the current multi-length actual length meets the cutting process requirement or not according to a comparison result, and generating a multi-length adjustment strategy. According to the method, the problem that the section length of the bar rolling line double-length shear is not accurate can be solved, and the yield and the sizing precision are improved.

Description

Technical Field

[0001] This invention relates to a method, device, and storage medium for adjusting the multiple length of a cooling bed, belonging to the technical field of cooling bed multiple length calculation. Background Technology

[0002] In the cooling bed process of bar production lines in the steel rolling industry, the accurate calculation of multiple lengths is the core link to ensure the quality of fixed-length segmentation of rolled products and control the cutting loss rate, which directly determines the yield rate and economic benefits of subsequent products. The mainstream length calculation scheme in the industry currently relies mainly on the "phototube signal triggering + fixed parameter calculation" model. Its technical principle is as follows: The calculation logic commonly used in the industry is based on "dynamic signal capture + empirical coefficient correction." The specific process is as follows: Signal triggering: The phototube installed at the mill exit monitors the workpiece conveying status in real time. When the head of the workpiece triggers the phototube to receive an energized signal, the system begins recording the finished product speed of the mill (preset by the mill transmission system or collected in real time); Basic length calculation: Based on production requirements, the target fixed length (e.g., 6m, 9m) and the number of fixed lengths (the number of sections a single workpiece needs to be divided into) are set. The theoretical total length of the sections is calculated using the formula "Basic length = Fixed length × Number of fixed lengths"; Cold shrinkage correction: Considering the length shrinkage during the workpiece cooling process, a fixed cold shrinkage coefficient of 1.013 (industry empirical value) is introduced to correct the basic length, ultimately obtaining "Computer-calculated multiple length = Fixed length × Number of fixed lengths × 1.013," which serves as the basis for section control before the workpiece is placed on the cooling bed. The original design of this solution was to achieve "real-time triggering and rapid calculation" through phototubes, which is compatible with the high-speed continuous production rhythm of steel rolling production lines and was widely used in early scenarios where the requirements for dimensional accuracy were low.

[0003] However, the above method for calculating multiple-scale lengths based on phototubes and fixed coefficients has a core flaw. 1. The phototube signal is susceptible to interference, leading to deviations in the calculation starting point, including temperature interference,

[0004] 1. Dust and moisture interference, as well as signal transmission fluctuations. These interferences directly cause deviations between the "rolled piece conveying time" recorded by the system and the actual time. When calculated in conjunction with the finished product speed of the rolling mill (usually 10-20 m / s), a signal delay of only 0.1 seconds can cause a length deviation of 1-2 m, far exceeding the fixed length tolerance requirements. 2. Fixed shrinkage coefficient cannot adapt to dynamic production conditions. The existing solution uses a fixed shrinkage coefficient of 1.013 for length correction, without considering the dynamic changes in the temperature and material of the rolled piece during actual production. Material difference impact: The existing solution does not adjust the coefficient for the material, resulting in a large deviation between the corrected length and the actual shrinkage result. 3. Lack of adaptability to allowance thresholds and cutting methods, exacerbating cutting losses. The existing solution only calculates the "theoretical multiple length," without considering the actual allowance requirements of subsequent cutting processes (shearing or sawing).

[0005] Existing technological deficiencies lead to the following production problems: Reduced yield: Deviations in multiple-length cutting increase the average cutting loss per rolled piece by 0.5%-1.2%. For a production line with an annual output of 500,000 tons of bar stock, this translates to an annual steel waste of 2,500-6,000 tons due to cutting losses. Fluctuations in length accuracy: Actual multiple-length cutting deviations exceeding tolerance ranges can reach 8%-15%, requiring manual screening of short and oversized pieces and reprocessing, increasing labor costs and disrupting production. Delayed parameter adjustment: Because existing solutions cannot identify the causes of deviations in real time (e.g., signal interference vs. improper shrinkage coefficient), on-site operators must repeatedly correct parameters through a cycle of "trial cutting-measurement-adjustment," with each adjustment taking 30-60 minutes, severely impacting production efficiency.

[0006] The steel rolling industry currently has an urgent need for a "high-precision, adaptive" multiple-length calculation solution. This requires addressing the deviation in the calculation starting point caused by interference from photoelectric tube signals, as well as dynamically adapting multiple parameters such as the shrinkage coefficient, cutting allowance, and saw blade thickness. Ultimately, the goal is to "predict deviations in advance and correct parameters in real time," avoiding cutting losses and efficiency losses due to inaccurate length calculations. However, to date, no mature technical solution has been found both domestically and internationally that can simultaneously cover all of these needs. Existing methods remain at the stage of "passive correction," failing to meet the precise control requirements of modern steel rolling production lines.

[0007] In summary, existing length calculation technologies based on phototubes and fixed coefficients suffer from drawbacks such as weak signal interference resistance, poor parameter adaptability, and failure to consider cutting process requirements. These shortcomings have become key bottlenecks restricting the improvement of yield and length accuracy control in bar production lines, necessitating a more stable and accurate calculation model to address these issues. Summary of the Invention

[0008] The technical problem to be solved by the present invention is to overcome the defects of the prior art and provide a method, device and storage medium for adjusting the length of multiple-length cutting on an upper cooling bed, which can solve the problem of inaccurate length of multiple-length cutting in bar rolling lines, thereby improving the yield and length accuracy.

[0009] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0010] In a first aspect, the present invention discloses a method for adjusting the length of a double-gauge cooling bed, comprising the following steps:

[0011] Obtain the number of brake pads, brake pad length, and shrinkage rate. Calculate the actual length of the multiple-gauge based on the number of brake pads, brake pad length, and shrinkage rate.

[0012] To obtain the fixed length, divide the actual length of the multiple length by the fixed length and round down to the nearest integer to get the number of segments.

[0013] Calculate the remaining allowance based on the actual length of the multiple length, the fixed length, and the number of segments;

[0014] Obtain the cutting process, and determine the allowance threshold based on different cutting processes;

[0015] Compare the remaining allowance with the allowance threshold, determine whether the current length of the multiple scale meets the cutting process requirements based on the comparison result, and generate a multiple scale length adjustment strategy.

[0016] The calculation method for the actual length of the multiple ruler is as follows: Actual length of multiple ruler = Number of brake plates * Length of brake plate * Cold shrinkage rate.

[0017] The shrinkage rate is set in stages according to the ambient temperature, specifically as follows:

[0018] When the ambient temperature is greater than 10℃ and less than 15℃, the shrinkage rate is taken as 0.998.

[0019] When the ambient temperature is between 15℃ and 35℃, the shrinkage rate is 0.996.

[0020] When the ambient temperature is greater than 35°C and less than 40°C, the shrinkage rate is 0.994.

[0021] The method for calculating the remaining margin is as follows: Remaining margin = Actual length of multiple lengths - Number of segments * Fixed length.

[0022] The method of obtaining the allowance threshold according to different cutting processes includes:

[0023] When the cutting process is shearing, the allowance threshold is set to 0.3.

[0024] When the cutting process is sawing, the allowance threshold is 0.8 + saw blade thickness * (number of segments + 1).

[0025] The step of determining whether the actual length of the current multiple-length cutter meets the cutting process requirements based on the comparison results, and generating a multiple-length cutter adjustment strategy, includes:

[0026] When the remaining margin is greater than the margin threshold, it is determined that the actual length of the current multiple ruler does not meet the cutting process requirements. While keeping the number of segments unchanged, the actual length of the multiple ruler is reduced so that the remaining margin is equal to the margin threshold. Alternatively, if the number of segments is increased by 1, the actual length of the multiple ruler is increased so that the updated remaining margin is equal to the margin threshold.

[0027] When the remaining allowance is equal to the allowance threshold, it is determined that the actual length of the current multiple measure meets the cutting process requirements, and no adjustment is made to the actual length of the multiple measure;

[0028] When the remaining allowance is less than the allowance threshold, it is determined that the actual length of the current multiple measure does not meet the cutting process requirements. While keeping the number of segments unchanged, the actual length of the multiple measure is increased so that the remaining allowance equals the allowance threshold.

[0029] If the remaining margin is less than half of the fixed length, the actual length of the multiple ruler is reduced while keeping the number of segments unchanged, so that the remaining margin is equal to the margin threshold; if the remaining margin reaches half of the fixed length, the actual length of the multiple ruler is increased by 1 while keeping the number of segments unchanged, so that the updated remaining margin is equal to the margin threshold.

[0030] When the number of segments is increased by 1, the increase in the actual length of the double ruler is calculated as: fixed length + margin threshold - remaining margin.

[0031] Secondly, the present invention discloses a device for adjusting the length of a double-length upper cooling bed, comprising:

[0032] The module for calculating the actual length of the multiple scale is used to obtain the number of moving plates, the length of the brake plate, and the shrinkage rate, and then calculates the actual length of the multiple scale based on these parameters.

[0033] The segment count calculation module is used to obtain the fixed length. It divides the actual length of the multiple length by the fixed length and rounds down to the nearest integer to get the segment count.

[0034] The remaining margin calculation module is used to calculate the remaining margin based on the actual length of the multiple length, the fixed length, and the number of segments.

[0035] The allowance threshold determination module is used to obtain the cutting process and obtain the allowance threshold according to different cutting processes.

[0036] The judgment and adjustment module is used to compare the remaining margin with the margin threshold, determine whether the actual length of the current multiple scale meets the cutting process requirements based on the comparison result, and generate a multiple scale length adjustment strategy.

[0037] Thirdly, the present invention discloses a computer-readable storage medium storing a computer program / instruction thereon, which, when executed by a processor, implements the above-described method for adjusting the length of the upper cooling bed.

[0038] The beneficial effects of this invention are as follows: This invention provides a method, device, and storage medium for adjusting the length of multiple-length cutting on an upper cooling bed. It calculates the remaining allowance based on the actual length of the multiple-length cutting, the fixed length, and the number of segments, obtains the cutting process, acquires allowance thresholds based on different cutting processes, compares the remaining allowance with the allowance thresholds, and generates a multiple-length adjustment strategy based on the comparison results. By calculating the actual length of the upper cooling bed, parameters are adjusted to reduce or increase the length so that the fixed length of the segments reaches the optimal length. This solves the problem of inaccurate segment lengths in multiple-length cutting on bar rolling lines, thereby improving yield and fixing accuracy. Attached Figure Description

[0039] Figure 1 This is a flowchart illustrating a method for adjusting the length of a cooling bed according to the present invention.

[0040] Specific implementation process

[0041] The present invention will be further described below. The following embodiments are only used to illustrate the technical solution of the present invention more clearly, and should not be used to limit the scope of protection of the present invention.

[0042] Example 1

[0043] like Figure 1 As shown, this invention discloses a method for adjusting the length of a cooling bed in multiples of its dimensions, comprising the following steps:

[0044] Step 1: Obtain the number of brake plates, the length of the brake plates, and the shrinkage rate. Calculate the actual length of the multiple gauge based on the number of brake plates, the length of the brake plates, and the shrinkage rate.

[0045] Step 2: Obtain the fixed length. Divide the actual length of the multiple length by the fixed length and round down to the nearest integer to get the number of segments.

[0046] Step 3: Calculate the remaining allowance based on the actual length of the multiple length, the fixed length, and the number of segments.

[0047] Step 4: Obtain the cutting process and determine the allowance threshold based on the different cutting processes.

[0048] Step 5: Compare the remaining allowance with the allowance threshold, determine whether the actual length of the current multiple length meets the cutting process requirements based on the comparison result, and generate a multiple length adjustment strategy.

[0049] This invention adjusts parameters by calculating the actual length of the cooling bed to reduce or increase the length, thereby achieving the optimal length for each segment. This solves the problem of inaccurate segment lengths in bar rolling mills, improving yield and sizing accuracy.

[0050] Example 2

[0051] like Figure 1 As shown, this invention discloses a method for adjusting the length of multiple-length sections on an upper cooling bed. Based on core parameters such as the number, size, and shrinkage rate of brake plates (skirts), and combined with differences in cutting processes, it achieves accurate calculation of the length of multiple-length sections on the upper cooling bed and outputs production adjustment suggestions through standardized calculations. This solves the problems of high cutting losses and low fixed-length rates caused by traditional calculation deviations. The method includes the following steps:

[0052] Step 1: Obtain the number of brake plates, brake plate length, and shrinkage rate. Calculate the actual length of the multiple-length steel piece based on these parameters. When the red-hot steel rests on the cooling bed, its length is directly related to the number of brake plates covering it and the fixed length of each brake plate. The length contraction effect (shrinkage rate) after cooling must also be considered. The calculation method for the actual length of the multiple-length steel piece is: Actual length of multiple-length steel piece = Number of brake plates * Brake plate length * Shrinkage rate.

[0053] The following parameters are specified: **Number of Brake Plates:** The actual number of brake plates covering the cooling bed, accurate to a decimal (e.g., 80.5 plates, indicating a scenario where the red steel does not completely cover a single brake plate). This needs to be measured on-site or obtained through the cooling bed positioning system. **Single Brake Plate Length:** An inherent parameter of the cooling bed equipment, usually a fixed value (e.g., 1.190m), determined by the equipment design drawings. The error must be controlled within ±0.001m. **Shrinkage Rate:** A coefficient less than 1, reflecting the effect of temperature on the shrinkage of the rolled piece length. It conforms to actual industrial scenarios and is set according to environmental temperature levels. When the ambient temperature is greater than 10℃ and less than 15℃ (low-temperature environment, winter), the shrinkage rate is 0.998; when the ambient temperature is between 15℃ and 35℃ (medium-temperature environment, spring and autumn), the shrinkage rate is 0.996; when the ambient temperature is greater than 35℃ and less than 40℃ (high-temperature environment, summer), the shrinkage rate is 0.994. The shrinkage rate values ​​are derived by fitting cooling test data of rolled parts (low carbon steel, alloy steel) at different temperatures to ensure consistency with the actual shrinkage pattern.

[0054] Step 2: Obtain the standard length. Divide the actual length of the multiple length by the standard length and round down to the nearest integer to get the number of segments. The standard length is the finished product length required by the production order (e.g., 6m, 9m), accurate to ±0.001m, and synchronized to the calculation model by the production planning system. Based on the standard length required for production, divide the actual length into several qualified standard segments, ensuring that each segment does not exceed the standard length (to avoid oversized scrap). Formula: Number of segments = Math.floor(Actual length of multiple length / Standard length). Calculation rule: Use rounding down (floor function). For example, when the actual length is 95.808m and the standard length is 6.000m, 95.808 / 6.000 = 15.968, and the number of segments is 15 (ensuring that all 15 segments are qualified standard length segments of 6.000m).

[0055] Step 3: Calculate the remaining allowance based on the actual length of the multiple cut, the standard length, and the number of segments. The remaining "excess length" after subtracting the total length of all qualified standard segments from the actual length needs to be determined in conjunction with the cutting method to determine if it meets the process allowance requirements. The calculation method for the remaining allowance is: Remaining allowance = Actual length of multiple cut - Number of segments * Standard length. Example: When the actual length is 95.808m, the number of segments is 15, and the standard length is 6.000m, the remaining allowance = 95.808 - 15 × 6.000 = 5.808m.

[0056] Step four: Obtain the cutting process and determine the allowance threshold based on different cutting processes. Set different allowance thresholds according to the process characteristics of the cutting method (shearing / sawing) to ensure that the length of the cut section is qualified, with no short sections or excessive cutting damage.

[0057] (1) Cutting method

[0058] Process characteristics: The shearing machine achieves segmentation through blade closure, requiring only a single-cut allowance (to ensure a smooth cut and avoid burrs), with no additional waste. Formula: Allowance threshold = Cutting allowance. Parameter value: The cutting allowance is fixed at 0.300m (based on industry-standard shearing equipment, matching the blade closure stroke with cut quality requirements).

[0059] (2) Sawing method

[0060] Process Characteristics: Sawing involves rotating a saw blade. Each cut generates kerf loss (saw blade thickness). Cutting n segments requires (n+1) cuts, thus the total kerf loss must be accumulated. The allowance threshold is 0.8 + saw blade thickness * (number of segments + 1). Sawing Allowance: A basic allowance to ensure the dimensional accuracy at the start and end of the sawing, fixed at 0.800m (industry experience value, adapted to the feed and retraction strokes of the sawing equipment). Saw Blade Thickness: The actual thickness of the saw blade used in the sawing equipment, typically 0.003-0.015m (e.g., 0.003m, must be filled in according to the saw blade specifications). Example: With 15 segments, a sawing allowance of 0.800m, and a saw blade thickness of 0.003m, the allowance = 0.800 + (15+1) × 0.003 = 0.848m.

[0061] Step 5: Compare the remaining allowance with the allowance threshold, determine whether the actual length of the current multiple length meets the cutting process requirements based on the comparison result, and generate a multiple length adjustment strategy.

[0062] When the remaining allowance exceeds the allowance threshold, it is determined that the current actual length of the multiple cut does not meet the cutting process requirements. If the remaining allowance is less than half of the fixed length, the actual length of the multiple cut is reduced while keeping the number of segments unchanged (to avoid cutting losses and waste), so that the remaining allowance equals the allowance threshold. If the remaining allowance reaches half of the fixed length, the actual length of the multiple cut is increased by adding 1 segment (adding 1 fixed length segment), so that the updated remaining allowance equals the allowance threshold. The increase in the actual length of the multiple cut = fixed length + allowance threshold - remaining allowance. For example, if the remaining allowance is 5.808m > the allowance of 0.842m, it is recommended to increase it by 1.034m ((6m fixed length + 0.842m) - 5.808m).

[0063] When the remaining allowance equals the allowance threshold, it is determined that the actual length of the current multiple measure meets the cutting process requirements, and no adjustment is made to the actual length of the multiple measure.

[0064] When the remaining allowance is less than the allowance threshold, it is determined that the actual length of the current multiple length does not meet the cutting process requirements. While keeping the number of segments unchanged, the actual length of the multiple length is increased (to avoid short-length scrap) so that the remaining allowance equals the allowance threshold. If the remaining allowance is 0.5m < the allowance of 0.842m, it is recommended to increase it by 0.342m (0.0842m - 0.5m).

[0065] Taking the production of 20mm diameter HRB400E bars on a bar production line (annual output of 500,000 tons) as an example, the effects of the traditional method and this implementation method are compared. The traditional "phototube + fixed coefficient" method often has a length tolerance deviation exceeding ±8mm, failing to meet the ±5mm requirement. In contrast, the length tolerance deviation of this invention is controlled within ±2mm, a 75% reduction compared to the traditional method. The cutting loss rate of the traditional "phototube + fixed coefficient" method is 0.5%-1.2%, while the cutting loss rate of this invention is 0.1%-0.3%, a 60%-75% reduction. The adjustment time for a single rolled piece using the traditional "phototube + fixed coefficient" method is 30-60 minutes (trial cut - measurement - adjustment), while this invention calculates in real time and outputs adjustment suggestions directly, improving adjustment efficiency by 99% compared to the traditional method. The traditional "phototube + fixed coefficient" method wastes 2,500-6,000 tons of steel per year, while the method of this invention wastes 500-1,500 tons of steel, saving 2,000-4,500 tons of steel per year compared to the traditional method.

[0066] Example 3

[0067] This embodiment discloses a device for adjusting the length of a double-gauge upper cooling bed, comprising:

[0068] The module for calculating the actual length of the multiple scale is used to obtain the number of moving plates, the length of the brake plate, and the shrinkage rate, and then calculates the actual length of the multiple scale based on these parameters.

[0069] The segment count calculation module is used to obtain the fixed length. It divides the actual length of the multiple length by the fixed length and rounds down to the nearest integer to get the segment count.

[0070] The remaining margin calculation module is used to calculate the remaining margin based on the actual length of the multiple length, the fixed length, and the number of segments.

[0071] The allowance threshold determination module is used to obtain the cutting process and obtain the allowance threshold according to different cutting processes.

[0072] The judgment and adjustment module is used to compare the remaining margin with the margin threshold, determine whether the actual length of the current multiple scale meets the cutting process requirements based on the comparison result, and generate a multiple scale length adjustment strategy.

[0073] Example 4

[0074] This embodiment discloses a computer-readable storage medium storing a computer program / instruction thereon. When the computer program / instruction is executed by a processor, it implements the upper cooling bed multiple-length adjustment method of embodiment 1 or embodiment 2.

[0075] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0076] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to operate in a particular process, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0077] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0078] The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A method of adjusting the coil size on a cooling bed, characterized by: The method comprises the following steps: Obtain the number of brake plates, the length of brake plates and the cold shrinkage rate, and calculate the actual length of the double-length according to the number of brake plates, the length of brake plates and the cold shrinkage rate: Obtain the fixed-length, and obtain the segmentation number by dividing the actual length of the double-length by the fixed-length and taking the integer part downward: Calculate the remaining allowance according to the actual length of the double-length, the fixed-length and the segmentation number; Obtain the cutting process, and obtain the allowance threshold according to different cutting processes; Compare the remaining allowance with the allowance threshold, determine whether the actual length of the double-length meets the requirement of the cutting process according to the comparison result, and generate the double-length adjustment strategy.

2. The method of adjusting the length of the billet on the upper cooling bed according to claim 1, characterized in that: The calculation method of the actual length of the double-length is: actual length of double-length = number of brake plates * length of brake plates * cold shrinkage rate.

3. The method of adjusting the length of the billet on the upper cooling bed according to claim 1, characterized in that: The cold shrinkage rate is graded according to the ambient temperature, specifically: When the ambient temperature is greater than 10 DEG C and less than 15 DEG C, the cold shrinkage rate is 0.998; When the ambient temperature is between 15 DEG C and 35 DEG C, the cold shrinkage rate is 0.996; When the ambient temperature is greater than 35 DEG C and less than 40 DEG C, the cold shrinkage rate is 0.

994.

4. The method of adjusting the length of the billet on the upper cooling bed according to claim 1, characterized in that: The calculation method of the remaining allowance is: remaining allowance = actual length of double-length - segmentation number * fixed-length.

5. The method of adjusting the length of the billet on the upper cooling bed according to claim 1, characterized in that: The method of obtaining the allowance threshold according to different cutting processes comprises: When the cutting process is shearing, the allowance threshold is 0.3; When the cutting process is sawing, the allowance threshold is 0.8 + saw blade thickness * (segmentation number + 1).

6. The method of adjusting the length of the billet on the upper cooling bed according to claim 1, characterized in that: The method of determining whether the actual length of the double-length meets the requirement of the cutting process according to the comparison result and generating the double-length adjustment strategy comprises: When the remaining allowance is greater than the allowance threshold, it is determined that the actual length of the double-length does not meet the requirement of the cutting process, the actual length of the double-length is reduced under the condition that the segmentation number remains unchanged, so that the remaining allowance is equal to the allowance threshold, or the actual length of the double-length is increased under the condition that the segmentation number + 1, so that the updated remaining allowance is equal to the allowance threshold; When the remaining allowance is equal to the allowance threshold, it is determined that the actual length of the double-length meets the requirement of the cutting process, and the actual length of the double-length is not adjusted; When the remaining allowance is less than the allowance threshold, it is determined that the actual length of the double-length does not meet the requirement of the cutting process, the actual length of the double-length is increased under the condition that the segmentation number remains unchanged, so that the remaining allowance is equal to the allowance threshold.

7. The method of adjusting the length of the coil on the upper cooling bed according to claim 6, characterized in that: If the remaining allowance is less than half of the fixed-length, the actual length of the double-length is reduced under the condition that the segmentation number remains unchanged, so that the remaining allowance is equal to the allowance threshold; if the remaining allowance reaches half of the fixed-length, the actual length of the double-length is increased under the condition that the segmentation number + 1, so that the updated remaining allowance is equal to the allowance threshold.

8. The method of adjusting the length of the coil on the upper cooling bed according to claim 7, characterized in that: In the method of increasing the actual length of the double-length under the condition that the segmentation number + 1, the actual length of the double-length is increased by: fixed-length + allowance threshold - remaining allowance.

9. A device for adjusting the billet length on a cooling bed, characterized in that: It comprises: The double-length actual length calculation module is used for obtaining the number of brake plates, the length of brake plates and the cold shrinkage rate, and calculating the actual length of the double-length according to the number of brake plates, the length of brake plates and the cold shrinkage rate: The segmentation number calculation module is used for obtaining the fixed-length, and obtaining the segmentation number by dividing the actual length of the double-length by the fixed-length and taking the integer part downward: The remaining allowance calculation module is used for calculating the remaining allowance according to the actual length of the double-length, the fixed-length and the segmentation number; The excess threshold value determination module is configured to obtain a cutting process and obtain an excess threshold value according to different cutting processes. The judgment and adjustment module is configured to compare the remaining excess with the excess threshold value, judge whether the actual length of the multiple length meets the requirement of the cutting process according to the comparison result, and generate a multiple length adjustment strategy.

10. A computer readable storage medium having stored thereon computer programs / instructions, characterized in that: The computer program / instruction is executed by the processor to implement the upper cooling bed multiple length adjustment method in any one of claims 1-8.

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