Strip steel anti-swing loosening system and method

Abstract

The application provides a strip steel anti-swing loosening system and method, and relates to the field of metal processing. The system comprises: a strip break detection device, which is used for generating a strip break signal when a strip break is detected; a quality measuring device, which is used for acquiring the quality of a coiled steel coil on a coiler; a roll diameter measuring device, which is used for acquiring the roll diameter of the coiled steel coil on the coiler; a rotational speed measuring device, which is used for the instantaneous linear speed of the steel coil; an anti-swing loosening controller, which is used for, in response to the strip break signal, performing the following operations in each control period: acquiring the instantaneous linear speed of the current period, the output power of the coiler motor in the current period and the roll diameter of the current period, and calculating a deceleration control amount of the current period based on the quality at the time of the strip break; and a coiler speed control device, which is used for, in each control period, performing deceleration control on the coiler motor according to the deceleration control amount of the current period until the speed of the coiler motor is reduced to zero.

Description

Technical Field

[0001] This invention relates to the field of metal processing, and in particular to a strip steel anti-loosening system and method. Background Technology

[0002] During 20-roll steel rolling, especially at rolling speeds exceeding 200 meters per minute, the strip is prone to sudden breakage due to uncertainties in the quality of incoming materials, defects such as cracks at the strip edges, or excessive tension differences between the strip's operating and transmission sides caused by operator error. After breakage, the strip, under inertia, will loosen and crease due to mutual compression on the winding side, requiring scrapping and resulting in waste.

[0003] In existing anti-loosening systems or methods, the winding machine motor is stopped by an automated program that sends a curve with a fixed slope to the frequency converter of the winding machine motor after the tape breaks.

[0004] However, due to differences in steel coil quality and speed, the inertia of the steel coil after the strip breaks varies. Therefore, the deceleration scheme using a fixed slope curve has the following shortcomings:

[0005] (1) The influence of the dynamic change in the mass of the steel coil on inertia before the strip breaks was not taken into account;

[0006] (2) When the speed of the strip before it breaks exceeds 200 m / min, the fixed deceleration acceleration cannot match the angular velocity changes of different coil diameters, which can easily lead to the steel coil becoming loose. Summary of the Invention

[0007] To address the technical problems existing in the prior art, the present invention aims to provide a strip steel anti-loosening system and method, which can dynamically adjust the deceleration mode of the coiler motor to ensure that the coiled steel will not loosen due to inertia when the strip steel breaks.

[0008] To achieve the above-mentioned objectives, the present invention provides a strip steel anti-loosening system, comprising:

[0009] A strip breakage detection device is used to generate a strip breakage signal when a strip breakage is detected.

[0010] A quality measuring device used to obtain the quality of the steel coils wound on the coiler;

[0011] A coil diameter measuring device is used to obtain the diameter of the steel coil that has been wound on the coiler;

[0012] A speed measuring device is used to obtain the instantaneous linear speed of the wound steel coil on the coiler;

[0013] Anti-loosening controller, in response to the belt breakage signal, performs the following operations in each control cycle:

[0014] Obtain the instantaneous linear velocity, the output power of the winding machine motor, and the winding diameter for the current cycle, and calculate the braking force for the current cycle.

[0015] Furthermore, based on the mass at the time of the belt break, the roll diameter of the current cycle, and the braking force of the current cycle, the deceleration control amount of the current cycle is calculated.

[0016] The winding machine speed control device is used to perform deceleration control on the winding machine motor according to the deceleration control amount of the current cycle in each control cycle until the speed of the winding machine motor drops to zero.

[0017] According to one technical solution of the present invention, the tape breakage detection device is further used for:

[0018] The tension of the strip between the main rolling mill and the coiler is collected by setting a step size; and when the tension at the next moment decreases to a preset ratio of the tension at the previous moment, the strip is determined to be broken.

[0019] According to one technical solution of the present invention, the mass measuring device includes:

[0020] The strip length measurement module is used to obtain the length of the strip that has been wound into coils on the coiler;

[0021] The quality calculation module is used to calculate the quality of the coiled steel based on the strip length, the pre-stored original coil quality, the original coil length, the previous strip thickness, and the current strip thickness.

[0022] According to one technical solution of the present invention, the anti-loosening controller is also used for:

[0023] In response to the strip breakage signal, a main mill stop signal is generated and transmitted to the main mill control unit.

[0024] The present invention also provides a method for preventing strip steel from loosening, the steps of which are as follows:

[0025] Step a: When a strip breakage is detected, a strip breakage signal is generated;

[0026] Step b: Obtain the mass, diameter, and instantaneous linear speed of the coiled steel coil on the coiler;

[0027] Step d: In response to the band break signal, perform the following operations in each control cycle:

[0028] Obtain the instantaneous linear velocity, the output power of the winding machine motor, and the winding diameter for the current cycle, and calculate the braking force for the current cycle.

[0029] Furthermore, based on the mass at the time of the belt break, the roll diameter of the current cycle, and the braking force of the current cycle, the deceleration control amount of the current cycle is calculated.

[0030] Step e: In each control cycle, according to the deceleration control amount of the current cycle, perform deceleration control on the winding machine motor until the speed of the winding machine motor drops to zero.

[0031] According to one technical solution of the present invention, the process of detecting strip breakage in step a includes:

[0032] The tension of the strip between the main rolling mill and the coiler is collected by setting a step size; and when the tension at the next moment decreases to a preset ratio of the tension at the previous moment, the strip is determined to be broken.

[0033] According to one technical solution of the present invention, step b, obtaining the mass of the coiled steel coil on the coiler, includes the following process:

[0034] Obtain the length of the strip steel that has been wound into a coil on the coiler;

[0035] The mass of the coiled steel is calculated based on the strip length, the pre-stored original coil mass, the original coil length, the previous strip thickness, and the current strip thickness.

[0036] According to one technical solution of the present invention, step g is further included:

[0037] In response to the strip breakage signal, a main mill stop signal is generated and transmitted to the main mill control unit.

[0038] The present invention provides a strip steel anti-loosening system and method, which has the following beneficial effects:

[0039] 1. By precisely matching the speed of the winding machine motor with the deceleration and acceleration of the steel coil, the movement speed of the winding machine motor when the strip breaks is consistent with the movement speed of the already tightened strip, thereby reducing strip loosening and significantly reducing the probability of strip loosening, thus improving the stability and reliability of strip winding.

[0040] 2. By reducing the probability of strip loosening, the amount of scrap caused by strip loosening is reduced, thus lowering the waste of raw materials. It also reduces the time operators spend handling scrap steel, saving time costs and improving the efficiency of human resource utilization.

[0041] 3. While reducing the probability of loosening, it also reduces equipment downtime caused by handling loose strip steel, making the production process smoother, thereby improving overall production efficiency and enhancing the company's market competitiveness. Attached Figure Description

[0042] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly described below. Obviously, the drawings described below are merely some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without creative effort.

[0043] Figure 1 A flowchart illustrating a method for preventing strip loosening according to an embodiment of the present invention is shown.

[0044] Figure 2 This diagram illustrates the cooperation between the strip breakage detection device, the strip length measurement module, and the 20-roll mill in a strip anti-loosening system according to an embodiment of the present invention.

[0045] Figure 3 The diagram schematically illustrates the electrical structure of a strip steel anti-loosening system according to one embodiment of the present invention. Detailed Implementation

[0046] The description of the embodiments in this specification should be taken in conjunction with the accompanying drawings, which should form part of the complete specification. In the drawings, the shape or thickness of the embodiments may be exaggerated and may be indicated in a simplified or convenient manner. Furthermore, parts of the various structures in the drawings will be described separately; it is worth noting that elements not shown in the figures or not described in words are in a form known to those skilled in the art.

[0047] The descriptions of the embodiments herein, including any references to directions and orientations, are for ease of description only and should not be construed as limiting the scope of the invention. The following description of preferred embodiments involves combinations of features, which may exist independently or in combination; the invention is not particularly limited to the preferred embodiments. The scope of the invention is defined by the claims. Figures 1-3 As shown; Specific Implementation Method 1

[0049] This embodiment of a strip anti-loosening system includes:

[0050] Strip breakage detection device 1 is used to generate a strip breakage signal when a strip breakage is detected;

[0051] Quality measuring device 2 is used to obtain the quality of the steel coil wound on the coiler;

[0052] The coil diameter measuring device 3 is used to obtain the diameter of the coiled steel coil on the coiler;

[0053] The rotational speed measuring device 4 is used to obtain the instantaneous linear speed of the coiled steel coil on the coiler;

[0054] Anti-loosening controller 5, in response to a belt breakage signal, performs the following operations in each control cycle:

[0055] Obtain the instantaneous linear velocity, the output power of the winding machine motor, and the winding diameter for the current cycle, and calculate the braking force for the current cycle.

[0056] Furthermore, based on the mass at the time of belt breakage, the roll diameter of the current cycle, and the braking force of the current cycle, the deceleration control amount of the current cycle is calculated.

[0057] The winding machine speed control device 6 is used to perform deceleration control on the winding machine motor according to the deceleration control amount of the current cycle in each control cycle until the speed of the winding machine motor drops to zero.

[0058] Specifically, such as Figures 2-3 As shown, the strip anti-loosening system of this embodiment is used in conjunction with an existing 20-roll cold rolling mill. A 20-roll cold rolling mill typically has one coiler on each side of the main mill. The cold rolling process of the strip involves first feeding the raw steel coil into the space between the upper and lower roll groups via an uncoiler (or a feeding trolley). When using a bidirectional reversible rolling method, the strip shuttles back and forth between the two ends of the main mill, with the coilers on both sides alternately acting as feed and discharge, thereby achieving multi-pass rolling.

[0059] Therefore, the strip breakage detection device 1, quality measurement device 2, coil diameter measurement device 3, rotational speed measurement device 4, anti-loosening controller 5, and coiler speed control device 6 should correspond to the two coilers, meaning that relevant data can be acquired when either coiler is winding. They can be configured as two sets, or, in the case of one set, can perform relevant detections on both coilers separately. The rotational speed measurement device 4 can obtain the instantaneous linear velocity by collecting the angular velocity of the coiler motor and then calculating it based on the coil diameter.

[0060] The following explanation uses a single-sided winding machine as an example:

[0061] The strip breakage detection device 1 is installed between the main rolling mill and the coiler to detect the strip breakage status at a preset frequency. When a strip breakage is detected, a strip breakage signal is generated as a trigger signal to activate the subsequent strip anti-loosening mechanism.

[0062] The parameter acquisition modules, including the quality measuring device 2, the coil diameter measuring device 3, and the rotation speed measuring device 4, can obtain the quality of the wound steel coil in real time. Instantaneous linear velocity , roll diameter Parameters such as these.

[0063] The anti-slip controller 5 (PLC) is pre-configured with an algorithm / program that calculates the deceleration control quantity based on the above parameters. The deceleration control quantity is achieved through braking deceleration acceleration. ( The curve (where negative values ​​indicate deceleration) is represented as follows: It also calculates and updates the deceleration acceleration based on the instantaneous linear velocity obtained at a set period (e.g., 0.1s). .

[0064] in, This is a correction factor, which needs to be determined based on the material. It typically ranges from 0.6 to 0.95, especially when the strip material is silicon steel. ; It is braking force ( ), It's about quality. It is the current volume diameter ( ).

[0065] The aforementioned braking force The larger the value, the greater the deceleration and acceleration. The larger; braking force The output power of the winding machine motor can be used as a reference. and the instantaneous linear velocity of the steel coil get( The upper limit is determined by the maximum power of the winding machine motor, which typically has a maximum power of 5000KW. As for quality... or roll diameter The larger the value, the greater the deceleration and acceleration. The smaller the value (because the moment of inertia increases, making it more difficult to decelerate).

[0066] The winding machine speed control device 6 can use a medium-voltage frequency converter to execute a dynamic deceleration curve (periodically updated deceleration acceleration). The motion control of the coiler motor is performed. If the steel coil is... The system is running at high speed and in the winding state. If a tape breakage occurs at this point, the system detects the breakage signal and issues a deceleration strategy, using a periodically updated deceleration acceleration. The speed is reduced. Simultaneously, the speed measuring device 4 (a combination of encoder and PLC) calculates the instantaneous linear velocity. To be used to calculate deceleration acceleration .

[0067] This implementation method uses intelligent deceleration matching to automatically calculate the most suitable deceleration control amount based on the weight of the steel coil and the current linear speed, ensuring that the coiler and the steel coil stop synchronously.

[0068] Simultaneously, it can respond rapidly at the moment of tape breakage. That is, after detecting tape breakage, the system can adjust the deceleration force within a very short time (e.g., 0.05s) to prevent the steel coil from continuing to rotate due to inertia. The deceleration force is dynamically adjusted according to the principle that the heavier and faster the steel coil, the smoother the deceleration should be, to prevent sudden braking from causing loosening. Specific Implementation Method Two

[0070] This embodiment is a further explanation of embodiment one. In this embodiment, the tape breakage detection device 1 is also used for:

[0071] The tension of the strip between the main rolling mill and the coiler is collected by setting a step size; and when the tension at the next moment decreases to a preset ratio of the tension at the previous moment, the strip is determined to be broken.

[0072] Specifically, the strip breakage signal is generated when the strip tension between the main rolling mill and the coiler suddenly drops by more than 70% as detected by the strip breakage detection device 1. The strip breakage detection device 1 uses a tension meter to collect the tension of the strip in real time during normal operation. Using the real-time tension during stable operation as a benchmark, a strip breakage is determined when the tension drops by 70% from the benchmark within one second and persists for more than 0.5 seconds, while simultaneously excluding interference conditions such as equipment start-up, shutdown, and instantaneous load changes. Specific Implementation Method 3

[0074] This embodiment is a further explanation of embodiment one or two. In this embodiment, the mass measuring device 2 includes:

[0075] Strip length measurement module 2-1 is used to obtain the strip length of the coiled steel coil on the coiler;

[0076] The quality calculation module 2-2 is used to calculate the quality of the coiled steel based on the strip length, the pre-stored original coil quality, the original coil length, the previous strip thickness, and the current strip thickness.

[0077] Specifically, the initial quality of the original steel coil and the original steel coil length The data is pre-entered manually into the anti-loosening controller 5 (or other control unit or storage unit that transmits data with the anti-loosening controller 5). This data pertains to the quality of the coils already wound on both sides of the coiler during the rolling process. It changes in real time, therefore the quality The quality calculation module 2-2 can be used based on the original steel coil. and the original steel coil length This is obtained by performing a geometric conversion, i.e., at the current moment. Equal to the current moment ( This indicates the real-time length of the strip steel that has been wound on one of the coilers. This indicates the thickness ratio between the previous and current passes during the rolling process. Typically, the original steel coil has a strip thickness of 2.3 mm, which, after… The required thickness is achieved after each rolling pass. For example, if the original strip thickness in the steel coil is 2.3mm, and the second pass requires a thickness of 1.4mm, then... ).

[0078] Wherein, formula In the middle, the real-time length of the coiled strip. The length is calculated by the strip length measuring module 2-1. The strip length measuring module can be an encoder, installed on the non-output side of the winding motor to measure the length of the wound strip. Specific Implementation Method Four

[0080] This embodiment is a further explanation of embodiment three. In this embodiment, the anti-loosening controller 5 is also used for:

[0081] In response to the strip breakage signal, a main mill stop signal is generated and transmitted to the main mill control unit.

[0082] Specifically, upon determining that a strip breakage has occurred, the main rolling mill must be immediately shut down. A main rolling mill shutdown signal is generated in response to the strip breakage signal and transmitted to the main rolling mill's control unit. Upon receiving the main rolling mill shutdown signal, the control unit can shut down the main rolling mill according to a preset shutdown control method. Detailed Implementation Method Five

[0084] The following are the steps of a method for preventing strip steel from loosening according to this embodiment:

[0085] Step a: When a strip breakage is detected, a strip breakage signal is generated;

[0086] Step b: Obtain the mass, diameter, and instantaneous linear speed of the coiled steel coil on the coiler;

[0087] Step c: In response to the band break signal, perform the following operations in each control cycle:

[0088] Obtain the instantaneous linear velocity, the output power of the winding machine motor, and the winding diameter for the current cycle, and calculate the braking force for the current cycle.

[0089] Furthermore, based on the mass at the time of belt breakage, the roll diameter of the current cycle, and the braking force of the current cycle, the deceleration control amount of the current cycle is calculated.

[0090] Step d: In each control cycle, deceleration control is performed on the winding machine motor according to the deceleration control amount of the current cycle until the speed of the winding machine motor drops to zero. Specific Implementation Method Six

[0092] This embodiment is a further explanation of embodiment five. In this embodiment, the process of detecting strip breakage in step a includes:

[0093] The tension of the strip between the main rolling mill and the coiler is collected by setting a step size; and when the tension at the next moment decreases to a preset ratio of the tension at the previous moment, the strip is determined to be broken. Detailed Implementation Method Seven

[0095] This embodiment is a further explanation of embodiment five or six. In this embodiment, step b, obtaining the mass of the coiled steel coil on the coiler, includes the following process:

[0096] Obtain the length of the strip steel that has been wound into a coil on the coiler;

[0097] The mass of the coiled steel is calculated based on the strip length, the pre-stored original coil mass, the original coil length, the previous strip thickness, and the current strip thickness. Detailed Implementation Method Eight

[0099] This embodiment is a further explanation of embodiment seven. In this embodiment, step g is also included:

[0100] In response to the strip breakage signal, a main mill stop signal is generated and transmitted to the main mill control unit.

[0101] The present invention discloses a strip steel anti-loosening system and method, wherein the system comprises: a strip breakage detection device for generating a strip breakage signal when a strip breakage is detected; a mass measuring device for acquiring the mass of the coiled steel on the coiler; a coil diameter measuring device for acquiring the coil diameter of the coiled steel on the coiler; a rotational speed measuring device for measuring the instantaneous linear speed of the steel coil; an anti-loosening controller for performing the following operations in each control cycle in response to the strip breakage signal: acquiring the instantaneous linear speed of the current cycle, the output power of the coiler motor of the current cycle, and the coil diameter of the current cycle, and calculating the deceleration control amount of the current cycle based on the mass at the time of strip breakage; and a coiler speed control device for performing deceleration control on the coiler motor according to the deceleration control amount of the current cycle in each control cycle until the speed of the coiler motor drops to zero.

[0102] Furthermore, it should be noted that the present invention can be provided as a method, apparatus, or computer program product. Therefore, embodiments of the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Moreover, embodiments of the present invention can take the form of a computer program product implemented on one or more computer-usable storage media containing computer-usable program code.

[0103] Embodiments of the present invention are described with reference to flowchart illustrations and / or block diagrams of methods, terminal devices (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, embedded processor, or other programmable data processing terminal device to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing terminal device, generate instructions for implementing the flowchart illustrations. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0104] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing terminal device to operate in a particular manner, 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 functions specified in one or more boxes. These computer program instructions may also be loaded onto a computer or other programmable data processing terminal equipment to cause a series of operational steps to be performed on the computer or other programmable terminal equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable terminal 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.

[0105] It should also be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or terminal device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or terminal device. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or terminal device that includes said element.

[0106] Finally, it should be noted that the above description represents a preferred embodiment of the present invention. It should be pointed out that although preferred embodiments have been described, those skilled in the art, once they understand the basic inventive concept of the present invention, can make various improvements and modifications without departing from the principles described herein. These improvements and modifications should also be considered within the scope of protection of the present invention. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the embodiments of the present invention.

Claims

1. A strip steel anti-loosening system, characterized in that, include: A strip breakage detection device is used to generate a strip breakage signal when a strip breakage is detected. A quality measuring device is used to obtain the quality of the steel coils wound on the coiler. ; A coil diameter measuring device is used to obtain the diameter of the steel coils wound on the coiler. ; The speed measuring device is used to obtain the instantaneous linear speed of the coiled steel on the coiler. ; Anti-loosening controller, in response to the belt breakage signal, performs the following operations in each control cycle: Get the instantaneous linear velocity of the current period Output power of the current cycle winder motor and the diameter of the current cycle The braking force for the current cycle is calculated. ;in, ; And, based on the mass at the time of the band breakage The diameter of the current cycle and the braking force of the current cycle The deceleration control amount for the current cycle is calculated. Deceleration control quantity is achieved through braking deceleration acceleration. The curve represents: ; in, This is a correction factor, ranging from 0.6 to 0.95; The winding machine speed control device is used to perform deceleration control on the winding machine motor according to the deceleration control amount of the current cycle in each control cycle until the speed of the winding machine motor drops to zero.

2. The strip anti-loosening system according to claim 1, characterized in that, The band breakage detection device is also used for: The tension of the strip between the main rolling mill and the coiler is collected by setting a step size; and when the tension at the next moment decreases to a preset ratio of the tension at the previous moment, the strip is determined to be broken.

3. The strip anti-loosening system according to claim 1, characterized in that, The anti-loosening controller is also used for: In response to the strip breakage signal, a main mill stop signal is generated and transmitted to the main mill control unit.

4. A method for preventing strip steel from loosening, characterized in that, The steps are as follows: Step a: When a strip breakage is detected, a strip breakage signal is generated; Step b: Obtain the mass of the coiled steel coil on the coiler. , roll diameter Instantaneous linear velocity ; Step c: In response to the band break signal, perform the following operations in each control cycle: Get the instantaneous linear velocity of the current period Output power of the current cycle winder motor and the diameter of the current cycle The braking force for the current cycle is calculated. ;in, ; And, based on the mass at the time of the band breakage The diameter of the current cycle and the braking force of the current cycle The deceleration control amount for the current cycle is calculated. Deceleration control quantity is achieved through braking deceleration acceleration. The curve represents: ; in, This is a correction factor, ranging from 0.6 to 0.95; Step d: In each control cycle, deceleration control is performed on the winding machine motor according to the deceleration control amount of the current cycle until the speed of the winding machine motor drops to zero.

5. The method for preventing strip loosening according to claim 4, characterized in that, The process of detecting steel strip breakage in step a includes: The tension of the strip between the main rolling mill and the coiler is collected by setting a step size; and when the tension at the next moment decreases to a preset ratio of the tension at the previous moment, the strip is determined to be broken.

6. The method for preventing strip loosening according to claim 4, characterized in that, It also includes step g: In response to the strip breakage signal, a main mill stop signal is generated and transmitted to the main mill control unit.

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