Method and system for calculating residual uncoiling length of high-strength steel

Abstract

The invention provides a high-strength steel uncoiling residual length calculation method and system.The method comprises the steps that S1, whether strip steel is high-strength steel or not is judged, and if yes, the step S2 is executed; if not, calculating the residual length of the strip steel on the uncoiling machine through the coiling diameter; s2, whether the strip steel meets the residual length range or not is judged, and if yes, the residual length range of the strip steel is calculated through a residual length algorithm; and if not, calculating the residual length of the strip steel on the uncoiling machine through the coiling diameter. According to the uncoiling residual length calculation method provided by the invention, the deviation caused by residual length calculation when the high-strength steel is uncoiled at the tail part is effectively reduced, and a belt escape accident is avoided.

Description

Technical Field

[0001] This invention belongs to the field of cold rolling mill production technology, specifically relating to a method and system for calculating the remaining length of high-strength steel after uncoiling. Background Technology

[0002] For the inlet section of the cold rolling mill, such as Figure 1 As shown, the inlet trolley loads the steel coils, after width and height measurement, onto the uncoiler. The strip head passes through the pinch rollers and enters the double cutter. After shearing, the strip head is threaded onto the welding machine and welded to the tail of the previous coil.

[0003] To ensure production continuity, the previous coil of strip should automatically decelerate during high-speed operation based on the remaining length, so that it stops precisely at the welding machine to await welding. This requires accurate calculation of the remaining length on the inlet uncoiler.

[0004] In cold rolling production, with the increasing demand for energy conservation and emission reduction, high-strength steel products account for an increasing proportion. They are mainly used to manufacture structural components that withstand high stress and lightweight sheet materials. They have sufficient toughness and high strength, such as automobile beams, container outer panels, and truck steel.

[0005] For the uncoiling process of high-strength steel, due to its high tensile strength, high yield strength, and high toughness, the uncoiler operates under constant tension control. As the coil diameter decreases, the lever arm of the outer strip on the inner coil shortens, reducing the "tightening" lever arm. This can lead to problems such as uncoiling and loosening of the inner coil. Traditionally, the remaining length of the uncoiler is calculated based on the coil diameter. However, when loosening occurs, the coil diameter increases, and the method of calculating the remaining uncoiling length based on the coil diameter will have a large deviation. This results in inaccurate calculation of the remaining uncoiling length when producing high-strength steel, which affects the positioning accuracy of automatic speed reduction and automatic tailing, and may even lead to serious accidents such as the tail escaping into the looper.

[0006] Patent document CN116460167A discloses a method for precisely controlling the tail length of strip steel in an uncoiler on a continuous annealing unit. This method can accurately calculate the length of the steel coil on the uncoiler, allowing operators to prepare for operation in advance based on the strip length, ensuring that the sheared length meets process requirements. Furthermore, this method optimizes the tension force of the uncoiler drum to achieve tight contact between the steel coil and the drum, preventing the strip from slipping on the uncoiler drum. However, this method does not solve the problem of strip slippage accidents caused by deviations in the calculation of the remaining length when high-strength steel unwinds at the tail end of the uncoiler.

[0007] This problem urgently needs to be solved. Summary of the Invention

[0008] In view of the deficiencies in the prior art, the purpose of this invention is to provide a method and system for calculating the remaining uncoiling length of high-strength steel.

[0009] According to the application, a high-strength steel uncoiling residual length calculation method is provided, comprising:

[0010] Step S1: determining whether the strip steel is high-strength steel, and if yes, executing step S2; if no, calculating the residual length of the strip steel on the uncoiler through the roll diameter;

[0011] Step S2: determining whether the strip steel meets the residual length range, and if yes, calculating the residual length range of the strip steel through the residual length algorithm; if no, calculating the residual length of the strip steel on the uncoiler through the roll diameter.

[0012] Preferably, in the step S1, the yield strength of the high-strength steel is greater than 500 MPa.

[0013] Preferably, the residual length range is 30-50 meters.

[0014] Preferably, the mathematical expression of the residual length algorithm is:

[0015]

[0016] wherein ΔP EBR is the incremental value of the entry tension roller periodic scanning pulse; ΔL is the equivalent value of the entry tension roller pulse length conversion; L 剩余长度 is the preset residual length of the strip steel, and the value range is 30-50 meters;

[0017] If the current residual length does not meet the residual length range, i.e. is less than the preset residual length of the strip steel, the residual length of the strip steel on the uncoiler is calculated through the roll diameter.

[0018] The expression of the roll diameter calculation is:

[0019]

[0020] wherein D Por is the outer diameter of the uncoiler coil; D Br is the diameter of the tension roller; P BR is the number of tension roller encoder pulses; P Por is the number of uncoiler encoder pulses; K BR is the reduction ratio of the tension roller; K Ppr is the reduction ratio of the uncoiler.

[0021] According to the application, a high-strength steel uncoiling residual length calculation system is provided, comprising:

[0022] Module M1: determining whether the strip steel is high-strength steel, and if yes, triggering the work of module M2; if no, calculating the residual length of the strip steel on the uncoiler through the roll diameter;

[0023] Module M2: judging whether the strip steel meets the remaining length range, and if yes, calculating the remaining length range of the strip steel by a remaining length algorithm; and if no, calculating the remaining length of the strip steel on the uncoiler by a roll diameter.

[0024] Preferably, in the module M1, the yield strength of the high-strength steel is greater than 500 MPa.

[0025] Preferably, the range of the remaining length is 30-50 meters.

[0026] Preferably, the mathematical expression of the remaining length algorithm is:

[0027]

[0028] Wherein, ΔP EVR is the incremental value of the periodic scanning pulse of the entry tension roll; ΔL is the equivalent value of the pulse length conversion of the entry tension roll; L 剩余长度 is the preset remaining length of the strip steel, and the value range is 30-50 meters;

[0029] If the current remaining length does not meet the range of the remaining length, i.e. is less than the preset remaining length of the strip steel, the remaining length of the strip steel on the uncoiler is calculated by the roll diameter.

[0030] The expression of the roll diameter calculation is:

[0031]

[0032] Wherein, D Por is the outer diameter of the steel roll of the uncoiler; D Br is the diameter of the tension roll; P BR is the pulse number of the encoder of the tension roll; P Por is the pulse number of the encoder of the uncoiler; K BR is the reduction ratio of the tension roll; K Por is the reduction ratio of the uncoiler.

[0033] According to the present application, a computer readable storage medium storing a computer program is provided, and the computer program is executed by a processor to implement the steps of the uncoiling remaining length calculation method of the high-strength steel.

[0034] According to the present application, an electronic device is provided, which comprises a memory, a processor, and a computer program stored in the memory and executable on the processor, and the computer program is executed by the processor to implement the steps of the uncoiling remaining length calculation method of the high-strength steel.

[0035] Compared with the prior art, the present application has the following beneficial effects:

[0036] 1. The uncoiling residual length calculation method provided by the application effectively reduces the deviation caused by the residual length calculation when the high-strength steel uncoiling tail is scattered, and avoids the escape accident.

[0037] 2. The residual length calculation method provided by the application avoids the abnormal calculation of the roll diameter caused by loose winding of the uncoiled strip, thereby affecting the calculation of the residual length.

[0038] 3. The calculation method provided by the application uses the traditional roll diameter calculation of the unit before the uncoiling residual length reaches the set range, thereby obtaining the residual length of the strip on the uncoiler, and has better flexibility and avoids the abnormal calculation of the roll diameter caused by loose winding. BRIEF DESCRIPTION OF DRAWINGS

[0039] Other features, objects and advantages of the application will become more apparent from the following detailed description of non-limiting embodiments, with reference to the accompanying drawings:

[0040] Figure 1 The inlet device arrangement diagram provided by the application. DETAILED DESCRIPTION

[0041] The application will be described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the application, but do not limit the application in any form. It should be pointed out that those skilled in the art can make several changes and improvements without departing from the concept of the application. These all belong to the protection scope of the application.

[0042] A new uncoiling residual length calculation method for high-strength steel is proposed to solve the problem of inaccurate calculation of the uncoiling residual length of the high-strength steel caused by the characteristics of the high-strength steel during the production of the high-strength steel in the cold rolling unit. The method described in the application more efficiently avoids the influence of the loose winding of the high-strength steel.

[0043] The application mainly solves the problem of inaccurate calculation of the uncoiling residual length caused by loose winding of the tail during the production of high-strength steel in the prior art.

[0044] According to the uncoiling residual length calculation method for high-strength steel provided by the application, the method comprises the following steps:

[0045] Step 1: Determine whether the strip is high-strength steel:

[0046] The calculation method provided by the application is mainly for high-strength steel, and the main basis for determining whether it is high-strength steel is the yield strength. Generally, steel with a yield strength greater than 500 MPa is identified as high-strength steel.

[0047] Step 2: According to the characteristics of high-strength steel with strong tensile strength, loose winding mainly occurs in the tail of the strip during uncoiling.

[0048] Therefore, the remaining length calculation method provided by the present application is mainly aimed at the tail several turns of the uncoiling strip, and the remaining length calculation before this is still obtained by the traditional roll diameter calculation.

[0049] Specifically, the higher the strength of the high-strength steel, the more the tail turns, the highest definition of the remaining length is 50 meters, the lowest definition of the remaining length is 30 meters, the maximum is 20 turns, and the minimum is 10 turns.

[0050] The traditional strip remaining length calculation is as follows:

[0051]

[0052] Wherein, L 残长 represents the remaining length of the strip, D Por is the outer diameter of the uncoiler coil, d Por is the inner diameter of the uncoiler coil, the default value is 760mm, δ is the interlayer compactness adjustment coefficient of the uncoiler, T 带钢 is the raw material thickness.

[0053] Step 3: The remaining length calculation based on the present application is actually the definition of the tail turns of the strip, and the tail turns are directly input by the operator on the man-machine picture or the corresponding tail turn value is set in the program according to the strength of the strip, so as to define the required adjustment range of the tail turns of the strip corresponding to the incoming material state abnormality or different yield strength.

[0054] Specifically, the higher the strength of the high-strength steel, the more the tail turns, the highest definition of the remaining length is 50 meters, the lowest definition of the remaining length is 30 meters, the maximum is 20 turns, and the minimum is 10 turns.

[0055] The set number is to set the length, which can be calculated by the traditional formula.

[0056] When the uncoiling remaining length has not reached the set range, the traditional roll diameter calculation of the unit is used, so as to obtain the remaining length of the strip on the uncoiler, and specifically, the calculation method of step 2 is referred to.

[0057] Step 4: When the remaining length is less than the set range, in order to avoid the abnormal roll diameter calculation caused by loose winding and affect the calculation of the remaining length, the calculation of the remaining length is switched to the method of the present application.

[0058] The remaining length of the inner core of the coil is calculated as follows:

[0059]

[0060] Wherein, ΔP EBR is the periodic scanning pulse increment of the inlet tension roller, ΔL is the pulse length conversion equivalent of the inlet tension roller, L 剩余长度The preset remaining length of the strip steel is in the range of 30-50 meters;

[0061] When the remaining length is less than the value, the computing method of the application is switched to perform relay computing of the remaining length.

[0062] According to the scheme of the application, the high-strength steel uncoiling remaining length computing method of the application is adopted by a cold continuous rolling mill of a certain steel plant.

[0063] The application further provides a high-strength steel uncoiling remaining length computing system, which can be realized by executing the flow steps of the high-strength steel uncoiling remaining length computing method, i.e., the high-strength steel uncoiling remaining length computing method can be understood as a preferred implementation of the high-strength steel uncoiling remaining length computing system by those skilled in the art.

[0064] According to the application, a high-strength steel uncoiling remaining length computing system is provided, which comprises:

[0065] Module M1: determining whether the strip steel is high-strength steel, and if yes, triggering module M2 to work; if no, obtaining the remaining length of the strip steel on the uncoiler through coil diameter calculation;

[0066] Module M2: determining whether the strip steel meets the remaining length range, and if yes, obtaining the remaining length range of the strip steel through the remaining length algorithm; if no, obtaining the remaining length of the strip steel on the uncoiler through coil diameter calculation.

[0067] Those skilled in the art know that, in addition to implementing the system and each device, module and unit thereof provided by the application in the form of pure computer readable program code, the system and each device, module and unit thereof provided by the application can also be realized in the form of logic gate, switch, application specific integrated circuit, programmable logic controller and embedded microcontroller by logically programming the method steps to achieve the same function. Therefore, the system and each device, module and unit thereof provided by the application can be considered as a hardware component, and the devices, modules and units included therein for achieving various functions can also be considered as structures in the hardware component; the devices, modules and units for achieving various functions can also be considered as both software modules for achieving the method and structures in the hardware component.

[0068] The specific embodiments of the present application are described above. It needs to be understood that the present application is not limited to the specific embodiments described above, and various changes or modifications can be made by those skilled in the art within the scope of the claims, which does not affect the essential content of the present application. The embodiments of the present application and the features in the embodiments can be combined with each other at will without conflict.

Claims

1. A method for calculating the remaining uncoiling length of high-strength steel, characterized in that, include: Step S1: Determine whether the strip steel is high-strength steel. If the result is yes, proceed to step S2. If the result is negative, the remaining length of the strip on the uncoiler is calculated using the coil diameter. Step S2: Determine whether the strip steel meets the remaining length range. If the result is yes, calculate the remaining length range of the strip steel using the remaining length algorithm. If the result is no, calculate the remaining length of the strip steel on the uncoiler using the coil diameter.

2. The method for calculating the remaining uncoiling length of high-strength steel according to claim 1, characterized in that, In step S1, the yield strength of the high-strength steel is greater than 500 MPa.

3. The method for calculating the remaining uncoiling length of high-strength steel according to claim 1, characterized in that, The remaining length is in the range of 30 to 50 meters.

4. The method for calculating the remaining uncoiling length of high-strength steel according to claim 3, characterized in that, The mathematical expression for the remaining length algorithm is: L 剩余长度 ′ =L 剩余长度 -∑ΔP EBR *ΔL Wherein, ΔP EBR ΔL is the incremental pulse of the inlet tension roller periodic scanning; ΔL is the equivalent of the inlet tension roller pulse length; L 剩余长度 The remaining length of the strip is the preset value, ranging from 30 to 50 meters. If the current remaining length does not meet the remaining length range, that is, it is less than the preset remaining length of the strip, then the remaining length of the strip on the uncoiler is calculated based on the coil diameter. The expression for calculating the roll diameter is: Among them, D Por D is the outer diameter of the steel coil uncoiler; Br P is the diameter of the tension roller; BR P is the number of pulses from the tension roller encoder. Por K is the number of encoder pulses for the uncoiler; BR K is the tension roller reduction ratio. Ppr This is the reduction ratio of the uncoiler.

5. A system for calculating the remaining uncoiled length of high-strength steel, characterized in that, include: Module M1: Determines whether the strip is high-strength steel. If the result is yes, then module M2 is triggered to work. If the result is negative, the remaining length of the strip on the uncoiler is calculated using the coil diameter. Module M2: Determines whether the strip steel meets the remaining length range. If the result is yes, the remaining length range of the strip steel is calculated by the remaining length algorithm; if the result is no, the remaining length of the strip steel on the uncoiler is calculated by the coil diameter.

6. The system for calculating the remaining uncoiling length of high-strength steel according to claim 5, characterized in that, In module M1, the yield strength of the high-strength steel is greater than 500 MPa.

7. The system for calculating the remaining uncoiling length of high-strength steel according to claim 5, characterized in that, The remaining length is in the range of 30 to 50 meters.

8. The system for calculating the remaining uncoiling length of high-strength steel according to claim 5, characterized in that, The mathematical expression for the remaining length algorithm is: L 剩余长度 ′ =L 剩余长度 -∑ΔP EBR *ΔL Wherein, ΔP EBR ΔL is the incremental pulse of the inlet tension roller periodic scanning; ΔL is the equivalent of the inlet tension roller pulse length; L 剩余长度 The remaining length of the strip is the preset value, ranging from 30 to 50 meters. If the current remaining length does not meet the remaining length range, that is, it is less than the preset remaining length of the strip, then the remaining length of the strip on the uncoiler is calculated based on the coil diameter. The expression for calculating the roll diameter is: Among them, D Por D is the outer diameter of the steel coil uncoiler; Br P is the diameter of the tension roller; BR P is the number of pulses from the tension roller encoder. Por K is the number of encoder pulses for the uncoiler; BR K is the tension roller reduction ratio. Por This is the reduction ratio of the uncoiler.

9. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by the processor, it implements the steps of the method for calculating the remaining uncoiling length of high-strength steel as described in any one of claims 1 to 4.

10. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the computer program is executed by the processor, it implements the steps of the method for calculating the remaining uncoiling length of high-strength steel as described in any one of claims 1 to 4.

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