Uncoiling control method and device for high-strength strip steel, medium and electronic equipment

Abstract

This application belongs to the field of strip steel uncoiling control technology, specifically proposing a method, device, medium, and electronic equipment for uncoiling control of high-strength strip steel. The method includes: after the strip steel is welded at the welding machine, pressing down the straightening machine and multiple pinch rolls between the uncoiler and the welding machine to tighten the strip steel; controlling the uncoiler to reverse under the action of the tensioning torque to output the initial uncoiling tension; simultaneously dividing the straightening machine and multiple pinch rolls into a first roll group and a second roll group according to their distance from the uncoiler, and controlling the first roll group and the second roll group to reverse synchronously with the uncoiler according to the first driving speed and the second driving speed, respectively; tracking the uncoiling length of the strip steel during the uncoiling tensioning process in real time, and determining the number of remaining coils of the strip steel on the uncoiler mandrel based on the uncoiling length; controlling the uncoiling tension output by the uncoiler based on the number of remaining coils, and controlling the expansion mode of the uncoiler mandrel. The technical solution provided by this application can improve the yield of high-strength strip steel.

Description

Technical Field

[0001] This application belongs to the field of strip steel uncoiling control technology, and particularly relates to a method, device, medium and electronic equipment for uncoiling control of high-strength strip steel. Background Technology

[0002] In existing uncoiler production lines, during the uncoiler setup process, the uncoiler motor typically outputs torque at a set tension. The uncoiler reverses to flatten the small sleeves of strip steel that arch before and after the welding machine, tightening the strip steel to complete the setup. Then, it uncoils at a set speed until the strip tail detaches from the mandrel. In the initial stage of uncoiler setup, due to the open pinch rollers and the presence of the small sleeves, the outer coil of the steel coil is prone to temporary loosening. The uncoiler mandrel reverses rapidly under the setup torque, which can re-tighten the outer coil, but the internal 3-5 coils are already loose. During high-speed uncoiling, interlayer misalignment occurs under tension, resulting in surface damage. Near the end of uncoiling, with fewer coils remaining, the wrapping force on the mandrel decreases. Under the combined effect of continuous hydraulic expansion and the elastic potential energy of the high-strength steel, the tail coil is also prone to interlayer misalignment, further causing surface damage to the strip steel. This leads to a decrease in the yield of high-strength strip steel. Therefore, how to improve the yield of high-strength strip steel is an urgent technical problem to be solved. Summary of the Invention

[0003] The embodiments of this application provide a method, apparatus, program product, medium, and electronic equipment for uncoiling control of high-strength strip steel, which can improve the yield of high-strength strip steel.

[0004] Other features and advantages of this application will become apparent from the following detailed description, or may be learned in part from practice of this application.

[0005] According to a first aspect of the embodiments of this application, a method for controlling the uncoiling of high-strength strip steel is provided, characterized in that the method includes: after the strip steel is welded at a welding machine, pressing down the straightening machine and multiple pinch rolls between the uncoiler and the welding machine to tighten the strip steel; controlling the uncoiler to reverse under the action of the tensioning torque to output the initial uncoiling tension, while dividing the straightening machine and multiple pinch rolls into a first roll group and a second roll group according to their distance from the uncoiler, and controlling the first roll group and the second roll group to reverse synchronously with the uncoiler according to a first driving speed and a second driving speed, respectively; tracking the uncoiling length of the strip steel during the uncoiling tensioning process in real time, and determining the remaining number of turns of the strip steel on the uncoiler mandrel according to the uncoiling length; controlling the uncoiling tension output by the uncoiler and controlling the expansion mode of the uncoiler mandrel according to the remaining number of turns.

[0006] In some embodiments of this application, based on the foregoing scheme, dividing the straightening machine and multiple pinch rolls into a first roll group and a second roll group according to their distance from the uncoiler includes: dividing the uncoiler pinch rolls and the straightening machine that are closer to the uncoiler into a first roll group; and dividing the intermediate pinch rolls and the starting pinch rolls that are farther from the uncoiler into a second roll group.

[0007] In some embodiments of this application, based on the foregoing scheme, controlling the first roll group and the second roll group to rotate synchronously with the uncoiler at a first driving speed and a second driving speed respectively includes: controlling the uncoiler pinch roll and the straightener in the first roll group to rotate synchronously with the uncoiler at a first driving speed, wherein the first driving speed is slower than the uncoiler's rotation speed by a first preset ratio; and controlling the intermediate pinch roll and the starting pinch roll in the second roll group to rotate synchronously with the uncoiler at a second driving speed, wherein the second driving speed is slower than the uncoiler's rotation speed by a second preset ratio.

[0008] In some embodiments of this application, based on the aforementioned scheme, the first preset ratio is 4% to 5%, and the second preset ratio is 8% to 10%.

[0009] In some embodiments of this application, based on the aforementioned scheme, controlling the unwinding tension output by the uncoiler and controlling the expansion mode of the uncoiler mandrel according to the remaining number of turns includes: if the remaining number of turns decreases to a first preset number of turns, then controlling the unwinding tension output by the uncoiler to decrease to a third preset proportion of the initial unwinding tension, and turning off the expansion mode of the uncoiler mandrel to keep the current outer diameter of the mandrel unchanged; if the remaining number of turns decreases to a second preset number of turns, then controlling the unwinding tension output by the uncoiler to decrease to a fourth preset proportion of the initial unwinding tension, and turning off the expansion mode of the uncoiler mandrel to keep the current outer diameter of the mandrel unchanged, wherein the second preset number of turns is less than the first preset number of turns, and the fourth preset proportion is less than the third preset proportion.

[0010] In some embodiments of this application, based on the aforementioned scheme, the first preset number of revolutions is 8 to 12 revolutions, and the second preset number of revolutions is 6 to 3 revolutions.

[0011] In some embodiments of this application, based on the foregoing scheme, the third preset ratio is 45% to 55%, and the fourth preset ratio is 35% to 25%.

[0012] According to a second aspect of the embodiments of this application, an uncoiling control device for high-strength strip steel is provided, characterized in that the device comprises: a pressing unit, used to press down the straightening machine and multiple pinch rolls between the uncoiler and the welding machine to press the strip steel after welding is completed at the welding machine; a first control unit, used to control the uncoiler to reverse under the action of the tensioning torque, output the initial uncoiling tension, and simultaneously divide the straightening machine and multiple pinch rolls into a first roll group and a second roll group according to their distance from the uncoiler, and control the first roll group and the second roll group to reverse synchronously with the uncoiler according to a first driving speed and a second driving speed, respectively; a determining unit, used to track the uncoiling length of the strip steel in real time during the uncoiling tensioning process, and determine the remaining number of turns of the strip steel on the uncoiler mandrel according to the uncoiling length; and a second control unit, used to control the uncoiling tension output by the uncoiler and control the expansion mode of the uncoiler mandrel according to the remaining number of turns.

[0013] According to a third aspect of the embodiments of this application, a computer program product is provided, the computer program product including computer instructions stored in a computer-readable storage medium and adapted to be read and executed by a processor to cause a computer device having the processor to perform an operation as described in any of the embodiments of the first aspect above.

[0014] According to a fourth aspect of the embodiments of this application, a computer-readable storage medium is provided, the computer-readable storage medium storing at least one computer program instruction, the at least one computer program instruction being loaded and executed by a processor to perform the operation performed by the method described in any of the embodiments of the first aspect above.

[0015] According to a fifth aspect of the present application, an electronic device is provided, the electronic device including one or more processors and one or more memories, the one or more memories storing at least one computer program instruction, the at least one computer program instruction being loaded and executed by the one or more processors to perform the operation performed by the method as described in any of the first aspect embodiments above.

[0016] Based on the technical solution proposed in this application, the strip steel is pressed tightly by a straightening press and multiple pinch rollers, allowing the strip steel to form a tight contact with the equipment. This reduces the relative sliding between the strip steel and the equipment, avoids damage to the strip steel surface caused by friction due to sliding, and protects the surface quality of the strip steel. The uncoiler reverses under the action of the tensioning torque and outputs the initial uncoiling tension, ensuring the stability and continuity of the uncoiling tensioning power and the basic tension. This allows the strip steel to smoothly transition from a relaxed state to a tensioned state, avoiding stress damage or plastic deformation of the high-strength strip steel due to instantaneous changes in power or tension. This adapts to the mechanical properties of high-strength strip steel and monitors the uncoiling process in real time. During the tensioning process, the uncoiling length of the strip is segmented according to the distance from the uncoiler, and the rollers are driven at different speeds and rotated synchronously. This ensures that the strip remains taut during rewinding, preventing the outer coil from loosening. The uncoiling length of the strip is monitored in real time, and the number of remaining coils is determined based on the uncoiling length. The uncoiling tension and the expansion mode of the mandrel are adjusted accordingly based on the number of remaining coils. This avoids the strip and mandrel being too tightly or too loosely fitted due to a fixed expansion mode, reducing abnormal stress between strip layers and between the strip and the mandrel. This further reduces the probability of interlayer misalignment, thereby improving the yield of strip production.

[0017] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0018] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort. In the drawings:

[0019] Figure 1 A flowchart of a method for controlling the uncoiling of high-strength strip steel according to one embodiment of this application is shown; Figure 2 This illustration shows a schematic diagram of strip uncoiling and tensioning in one embodiment of this application; Figure 3 A block diagram of an uncoiling control device for high-strength strip steel according to one embodiment of this application is shown; Figure 4 A schematic diagram of the structure of an electronic device according to one embodiment of this application is shown. Detailed Implementation

[0020] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0021] Furthermore, the described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the following description to give a thorough understanding of embodiments of this application. However, those skilled in the art will recognize that the technical solutions of this application can be practiced without one or more of the specific details, or other methods, components, apparatuses, steps, etc., can be employed. In other instances, well-known methods, apparatuses, implementations, or operations are not shown or described in detail to avoid obscuring various aspects of this application.

[0022] The block diagrams shown in the accompanying drawings are merely functional entities and do not necessarily correspond to physically independent entities. That is, these functional entities can be implemented in software, in one or more hardware modules or integrated circuits, or in different network and / or processor devices and / or microcontroller devices.

[0023] The flowcharts shown in the accompanying drawings are merely illustrative and do not necessarily include all content and operations / steps, nor do they necessarily have to be performed in the described order. For example, some operations / steps can be broken down, while others can be combined or partially combined; therefore, the actual execution order may change depending on the specific circumstances.

[0024] It should also be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such uses of these terms can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described.

[0025] To enable those skilled in the art to better understand this application, the crystallizer vibration device proposed in this application will first be briefly described.

[0026] In the existing uncoiling production line, during the uncoiling and tensioning process, the uncoiler motor usually outputs the corresponding torque according to the set tension. The uncoiler reverses to flatten the small sleeves of the strip steel that are arched in front and behind the welding machine and tightens the strip steel to complete the tensioning. Then, it is uncoiled at the set speed until the strip tail is separated from the mandrel. In the initial stage of uncoiling and tensioning, due to the opening of the pinch rolls and the presence of the strip sleeve, the outer coil of the steel coil is prone to temporary loosening. The uncoiling mandrel reverses rapidly under the tensioning torque, which can re-tighten the outer coil of the strip, but the inner 3 to 5 coils have already loosened. During high-speed uncoiling, interlayer misalignment occurs under tension, resulting in surface scratches. When uncoiling is nearing completion, the number of remaining coil coils is small, reducing the wrapping force on the mandrel. Under the combined influence of the continuous expansion of the mandrel under hydraulic pressure and the elastic potential energy of the high-strength steel itself, the tail coil is also prone to interlayer misalignment, which in turn causes surface scratches on the strip, leading to a decrease in the yield of high-strength strip steel. Based on this, this application proposes an uncoiling control method for high-strength strip steel to improve the yield of high-strength strip steel.

[0027] Next, we will combine Figure 1 The uncoiling control method for high-strength strip steel proposed in this application is described in detail.

[0028] See Figure 1 The diagram illustrates a flowchart of an uncoiling control method for high-strength strip steel according to one embodiment of this application. This method can be executed by a device with computational processing capabilities, such as... Figure 1 As shown, the method may include at least steps 110 to 140: Step 110: After the strip steel is welded at the welding machine, the straightening machine and multiple pinch rollers between the uncoiler and the welding machine are pressed down to tighten the strip steel.

[0029] Step 120: Control the uncoiler to reverse under the action of the tensioning torque, output the initial unwinding tension, and at the same time divide the straightening machine and multiple pinch rolls into a first roll group and a second roll group according to the distance from the uncoiler, and control the first roll group and the second roll group to reverse synchronously with the uncoiler according to the first driving speed and the second driving speed, respectively.

[0030] Step 130: Track the uncoiling length of the strip during the uncoiling and tensioning process in real time, and determine the remaining number of coils of strip on the uncoiling mandrel based on the uncoiling length.

[0031] Step 140: Based on the remaining number of turns, control the unwinding tension output by the uncoiler and control the expansion mode of the uncoiler mandrel.

[0032] In this application, after the strip steel is welded at both ends at the welding machine, the straightener and multiple pinch rolls located between the uncoiler and the welding machine are pressed down in a timely manner to tighten the strip steel. This operation physically adheres the strip steel between the uncoiler and the welding machine to fix the strip steel. The straightener and pinch rolls, as transmission and positioning components that are in direct contact with the strip steel, ensure that the strip steel forms a tight contact with the roll body and the working surface of the straightener, thus preventing the outer ring of the strip steel coil from becoming loose for a short period of time. This reduces the probability of interlayer misalignment and surface damage under tension during high-speed uncoiling, thereby improving the yield of strip steel production.

[0033] In this application, the tensioning torque is the power basis for the uncoiler to complete the tensioning action. It can provide a continuous and stable torque output for the uncoiler to reverse. The purpose of the reversing action is to pull the strip steel that has arched after welding, so as to achieve the tensioning and unsleeving of the strip steel. The initial uncoiling tension provides the basic tension force for the strip steel, allowing the strip steel to gradually transition from the relaxed state after welding to the tensioned state required for uncoiling. Moreover, the stable output of the initial tension can prevent the strip steel from plastic deformation due to excessive instantaneous force.

[0034] In this application, the straightening machine and multiple pinch rolls are divided into a first roll group and a second roll group according to their distance from the uncoiler. The two roll groups are controlled to rotate synchronously with the uncoiler at a first drive speed and a second drive speed, respectively. Synchronous rotation means that the movement direction of the rolls and the uncoiler is completely consistent, with only a difference in speed. This design ensures that the strip moves in the same direction under the traction of the uncoiler and pinch rolls, avoiding the strip from being pulled or jammed due to inconsistent movement directions. Controlling the two roll groups to rotate synchronously with the uncoiler at the first drive speed and the second drive speed, respectively, ensures that the strip is always in a taut state, avoiding loosening due to the presence of strip sleeves, reducing the probability of surface scratches, and improving the yield of strip production.

[0035] In this application, please refer to Figure 2 This illustrates a schematic diagram of strip uncoiling and tensioning in one embodiment of this application, as shown below. Figure 2As shown, the steel coil 202 is threaded onto the welding machine 209 to complete the welding process with the tail of the previous coil. Driven by the uncoiler mandrel 201, it begins to reverse and build tension, eliminating the small sleeves 208 of the strip that arch up before and after the welding machine during welding. In traditional control methods, after the uncoiling and tensioning command is issued, the pinch rollers and straighteners in contact with the strip on the channel must all be opened, that is, the uncoiler pinch roller 204, the intermediate pinch roller 206, the initial sleeve pinch roller 207, and the straightener 205 must all be opened to ensure the smoothness of the tensioning action. Due to the presence of the small sleeves 208 of the strip before and after the welding machine, especially for high-strength, thick-gauge steel grades, the amount of these sleeves should not be too small to avoid the strip being subjected to gravity and surface stress, resulting in sleeve failure. At this time, the uncoiler pressure rollers open, the uncoiler reverses, sets tension, and releases the coil. Due to the brief loss of tension, and the small pressure rollers 203 on the uncoiler that hold the steel coil in place are not driven, the outer layers of the steel coil begin to loosen. If many layers loosen, the steel coil cannot be restored to its original tightly wrapped state after the uncoiler sets tension. During the high-speed uncoiling process, interlayer misalignment leads to surface scratches on the strip steel.

[0036] In this application, reference continues to be made to Figure 2 According to the technical solution of this application, by pressing down the straightening machine and multiple pinch rollers (uncoiler pinch roller 204, intermediate pinch roller 206, starting pinch roller 207, and straightening machine 205) between the uncoiler and the welding machine, the strip steel is pressed tightly, which can prevent the outer ring from loosening during the process of the uncoiler reversing to build tension and remove the sleeve.

[0037] In this application, the uncoiling length of the strip is tracked in real time during the uncoiling and tensioning process. That is, the actual length data of the strip being pulled out from the uncoiling mandrel is continuously and dynamically collected. Then, the number of remaining coils of the strip on the uncoiling mandrel is determined based on the uncoiling length. Since the thickness of the strip and the basic specifications of the uncoiling mandrel are fixed parameters, the number of coils of the strip on the mandrel and the total length of the strip are fixed. Thus, the uncoiling length collected in real time can be accumulated, and the number of uncoiled strip coils remaining on the mandrel can be accurately determined and calculated, providing a basis for subsequent tension and expansion mode control.

[0038] In this application, the remaining number of coils of strip steel on the uncoiler mandrel reflects the wrapping state of the strip steel on the mandrel and the stress distribution state of the strip steel itself. When there are more remaining coils, the wrapping force of the strip steel on the mandrel is stronger, and the adhesion between the strip steel layers is higher. When there are fewer remaining coils, the wrapping force of the strip steel on the mandrel will weaken, and the stress state between the strip steel layers will also change. By adjusting the expansion mode of the mandrel, the expansion and contraction state of the mandrel can be adapted to the wrapping requirements of the remaining strip steel. This avoids the situation where, when there are fewer remaining coils of steel coil on the uncoiler mandrel, the wrapping force of the steel coil on the mandrel decreases, the mandrel continues to expand under hydraulic action, and at the same time, the elastic potential energy of the high-strength steel is superimposed, causing the remaining tail coil to produce interlayer misalignment. This reduces the probability of surface damage and improves the yield of strip steel production.

[0039] In this application, the strip steel is pressed together by a straightening press and multiple pinch rollers, ensuring close contact between the strip steel and the equipment. This reduces relative slippage between the strip steel and the equipment, preventing damage to the strip steel surface caused by friction from slippage and protecting the surface quality of the strip steel. The uncoiler reverses under the action of the tensioning torque and outputs the initial uncoiling tension, ensuring the stability and continuity of the uncoiling tensioning power and the basic tension. This allows the strip steel to smoothly transition from a relaxed state to a tensioned state, avoiding stress damage or plastic deformation of the high-strength strip steel due to sudden changes in power or tension. This adapts to the mechanical properties of high-strength strip steel and allows for real-time monitoring of the uncoiling tensioning process. During the process, the uncoiling length of the strip steel is segmented according to the distance from the uncoiler, and the rollers are driven at different speeds and rotated synchronously. This ensures that the strip steel remains taut throughout the rewinding process, preventing the outer coil from loosening. The uncoiling length of the strip steel is monitored in real time, and the number of remaining coils is determined based on the uncoiling length. The uncoiling tension and the expansion mode of the mandrel are adjusted accordingly based on the number of remaining coils. This avoids the strip steel from being too tight or too loose with the mandrel due to a fixed expansion mode, reduces abnormal stress between strip steel layers and between the strip steel and the mandrel, and further reduces the probability of interlayer misalignment, thereby improving the yield of strip steel production.

[0040] In step 120 above, the process of dividing the straightening machine and multiple pinch rolls into a first roll group and a second roll group according to their distance from the uncoiler can be specifically performed according to steps 121 to 122 below: Step 121: Divide the uncoiler pinch roll and the straightener that are closer to the uncoiler into the first roll group.

[0041] Step 122: Divide the intermediate pinch roll and the starting pinch roll, which are far from the uncoiler, into a second roll group.

[0042] In this application, the uncoiler pinch roll and straightener, which are close to the uncoiler, are classified as the first roll group. From the perspective of their arrangement, the uncoiler pinch roll and straightener are equipment arranged adjacent to the uncoiler, and the two are close to each other. They belong to the near-end transition section between the uncoiler and the subsequent rolls. They are the first transmission and straightening equipment that the uncoiler mandrel contacts after pulling out the strip. From the perspective of their functions, the uncoiler pinch roll can receive the power traction of the uncoiler and perform initial pinching and guiding of the strip pulled out from the mandrel to ensure that the strip stably leaves the mandrel. The straightener, on the other hand, straightens the strip that has just been pulled out of the coil at this near-end position, eliminating the curling curvature of the strip and ensuring that the strip enters the subsequent roll group straight. The reason for classifying the two as the same roll group is that they belong to the first section of uncoiler power and tension transmission, which is suitable for the strip control requirements of the near-end section.

[0043] In this application, the intermediate pinch roll and the uncoiling pinch roll, which are far from the uncoiler, are classified as the second roll group. From the perspective of their arrangement, the intermediate pinch roll and the uncoiling pinch roll are located on the side of the first roll group that is far away from the uncoiler and closer to the welding machine end. This belongs to the far end section between the uncoiler and the welding machine and is the core transition equipment for the strip steel to be transferred from the near end section to the welding machine end. From the perspective of their functional attributes, the intermediate pinch roll can be used for pinching and tension transfer in the middle section of the strip steel; the uncoiling pinch roll can be used for the uncoiling and uncoiling processes in the welding process. The reason for classifying the two into the same roll group is that both are located in the far end section of the uncoiler power and tension transfer, and both serve the smooth transfer of the strip steel to the welding machine end and the uncoiling action, which is suitable for the strip steel control requirements of the far end section.

[0044] In this application, the uncoiling pinch roll and the straightening machine can be divided into a first roll group, the intermediate pinch roll into a second roll group, and the starting pinch roll into a third roll group. The first roll group, the second roll group and the third roll group can be controlled to rotate synchronously with the uncoiling machine according to the first driving speed, the second driving speed and the third driving speed, respectively. This application does not make specific limitations in this regard.

[0045] In this application, integrating equipment with similar locations and functions into the same roll group clarifies the target of subsequent drive speed control. Drive parameters are uniformly set for all equipment in the same roll group, improving the operational efficiency of uncoiling control. Dividing the roll group into sections based on near and far ends matches the process characteristics of tension gradually transferring from the uncoiler to the welding machine during uncoiling. This provides a basis for segmenting the roll groups to use differentiated drive speeds, enabling precise speed control to adapt to the tension transmission requirements of different sections. This reduces the probability of surface damage and increases the yield of strip steel production.

[0046] In step 120 above, the control of the first and second roller groups to rotate synchronously with the uncoiler at the first driving speed and the second driving speed, respectively, can be specifically executed according to steps 123 to 124 below: Step 123: Control the uncoiling pinch roll and the straightening machine in the first roll group to rotate synchronously with the uncoiler at the first driving speed. The first driving speed is slower than the uncoiler's rotation speed by a first preset ratio.

[0047] Step 124: Control the intermediate pinch roll and the starting pinch roll in the second roll group to rotate in reverse synchronously with the uncoiler at the second driving speed. The second driving speed is slower than the uncoiler's reverse speed by a second preset ratio.

[0048] In this application, the first preset ratio can be 4% to 5%, for example, 4.5%, and the second preset ratio can be 8% to 10%, for example, 9%. This application does not make any specific limitation on this.

[0049] In this application, if the uncoiling pinch roll and the straightening machine are divided into a first roll group, the intermediate pinch roll is divided into a second roll group, and the starting pinch roll is used as a third roll group, and the first roll group, the second roll group, and the third roll group are controlled to rotate synchronously with the uncoiling machine at a first drive speed, a second drive speed, and a third drive speed, respectively, then the ratio corresponding to the first drive speed can be 3% slower than the reverse speed of the uncoiling machine, the ratio corresponding to the second drive speed can be 6% slower than the reverse speed of the uncoiling machine, and the ratio corresponding to the third drive speed can be 9% slower than the reverse speed of the uncoiling machine. This application does not make specific limitations on this.

[0050] In this application, controlling the first drive speed to be slower than the uncoiler's reversing speed is to create a small speed difference between the first roll group and the uncoiler. This speed difference allows the strip steel, which has just detached from the mandrel, to maintain a moderate tension, preventing the strip steel from becoming loose or slack between the uncoiler and the first roll group. Synchronous reversal means that the movement direction of the first roll group is the same as the movement direction of the uncoiler, both being reversible. This ensures that the strip steel pulled from the uncoiler mandrel can be pulled in the same direction by the first roll group, avoiding reverse pulling between the strip steel and the rolls and the straightener due to inconsistent movement directions, and preventing the strip steel from bending or jamming. Uniform speed within the same roll group means that the uncoiler pinch roll and the straightener use the same first drive speed. Because the two are arranged at similar distances and share the function of near-end traction and straightening of the strip steel, uniform speed ensures that the movement and stress state of the strip steel in this section is consistent, avoiding uneven local stress and abnormal surface friction of the strip steel caused by different speeds of a single device.

[0051] In this application, controlling the second drive speed to be slower than the uncoiler reversing speed is to keep the strip in the second roll section under tension. The second preset ratio corresponding to this speed difference should be greater than the first preset ratio, that is, the second drive speed is slower than the first drive speed, so as to ensure that a small speed difference is formed between the second roll group and the first roll group. This speed difference is used to keep the strip between the second roll group and the first roll group under appropriate tension, avoid the phenomenon of loose coils, reduce the probability of interlayer misalignment, and improve the strip yield.

[0052] In this application, all roller sets rotate synchronously with the uncoiler and move in the same direction, ensuring that the strip steel is always in a state of unidirectional traction from the uncoiler mandrel to the welding machine end. This avoids the pulling and jamming problems caused by reverse movement, prevents the strip steel from bending and plastic deformation, and ensures the integrity of the strip steel's physical form. At the same time, it makes the transfer process of the strip steel between the roller sets smoother and improves the stability of uncoiler tensioning. Different speed difference ratios are set according to the distance between the roller sets and the uncoiler, so that the strip steel can maintain appropriate tension throughout the entire conveying channel to prevent the steel coil from loosening, thereby reducing the damage to the strip steel surface caused by friction and extrusion, protecting the surface quality of the strip steel, and improving the strip steel yield.

[0053] In step 140 above, controlling the unwinding tension output by the uncoiler and controlling the expansion mode of the uncoiler mandrel based on the remaining number of turns can be specifically performed according to steps 141 to 142 as follows: Step 141: If the remaining number of turns decreases to the first preset number of turns, the unwinding tension output by the uncoiler is controlled to decrease to the third preset ratio of the initial unwinding tension, and the uncoiler mandrel expansion mode is turned off to keep the current outer diameter of the mandrel unchanged.

[0054] Step 142: If the remaining number of turns decreases to the second preset number of turns, the unwinding tension output by the uncoiler is controlled to decrease to the fourth preset ratio of the initial unwinding tension, and the mandrel expansion mode of the uncoiler is turned off to keep the current outer diameter of the mandrel unchanged. The second preset number of turns is less than the first preset number of turns, and the fourth preset ratio is less than the third preset ratio.

[0055] In this application, the first preset number of laps is 8 to 12 laps, specifically 10 or 11 laps, and the second preset number of laps is 6 to 3 laps, specifically 5 or 4 laps. This application does not make any specific limitation on this.

[0056] In this application, the third preset ratio is 45% to 55%, specifically 50%, and the fourth preset ratio is 35% to 25%, specifically 30%. This application does not make any specific limitation on this.

[0057] In this application, when the remaining number of coils of strip steel on the mandrel decreases to the first preset number of coils, two operations are performed: reducing the uncoiling tension to the third preset ratio of the initial tension and closing the mandrel expansion mode, while keeping the current outer diameter unchanged. From the perspective of tension control, at this time, there are still a certain number of coils of strip steel on the mandrel. Although the wrapping force of the strip steel on the mandrel has decreased compared to the middle of the uncoiling, it still has a certain basis for adhesion. Reducing the tension to the third preset ratio is both suitable for the slight decrease in wrapping force, avoiding excessive tension that would cause excessive stretching of the strip steel, and preventing the strip steel from loosening due to excessive tension reduction, thus ensuring that the strip steel remains in a stable uncoiling state. From the perspective of mandrel control, in the early stage of the final uncoiling stage, the wrapping force of the strip steel has already begun to decrease. If the mandrel continues to maintain the expansion mode, it will exert additional compression on the inner coil of the strip steel. Combined with the elastic potential energy of high-strength steel, this can easily cause interlayer misalignment. At this time, closing the expansion mode and locking the outer diameter of the mandrel at the current state can eliminate the compression interference of the mandrel expansion zone and keep the contact state between the strip steel and the mandrel stable.

[0058] In this application, when the remaining number of strip coils on the mandrel is further reduced to the second preset number of coils, the uncoiling tension is reduced to the fourth preset ratio of the initial tension, and the mandrel expansion mode is kept off to maintain the current outer diameter of the mandrel. From the perspective of tension control, at this time, the number of strip coils on the mandrel is even smaller, and the wrapping force of the strip on the mandrel is significantly reduced. The elastic potential energy of high-strength steel becomes the main factor affecting the state of the strip. The tension is further reduced to the fourth preset ratio to adapt to the significant decrease in wrapping force, avoiding excessive tension pulling the tail coil and causing interlayer separation or misalignment, and reducing the probability of surface damage to the strip. From the perspective of mandrel control, because the number of tail coil coils is small, the fit to the mandrel is low. If the outer diameter of the mandrel shows an expansion trend, it will cause the tail coil to loosen. Therefore, it is necessary to lock the outer coil of the mandrel to ensure that the tail coil does not loosen.

[0059] In this application, the uncoiling tension is gradually reduced as the number of remaining coils of the strip decreases, avoiding sudden tension drops caused by a single tension reduction, thus ensuring a smooth transition of the strip's stress state at the end of the uncoiling process. Simultaneously, the tension reduction ratio corresponds to the layer number of remaining coils, ensuring that the strip's stress is always matched to its own wrapping force on the mandrel, avoiding excessive tension pulling or excessively low tension relaxation, and reducing interlayer slippage caused by abnormal stress. Furthermore, the mandrel expansion mode is closed and the outer diameter is locked, eliminating the squeezing interference caused by mandrel expansion, ensuring a stable contact state between the strip and the mandrel throughout the uncoiling process, avoiding inner coil squeezing and loosening problems caused by mandrel expansion and contraction, effectively reducing the probability of interlayer slippage and improving the strip's yield.

[0060] Based on the technical solution proposed in this application, the strip steel is pressed tightly by a straightening press and multiple pinch rollers, allowing the strip steel to form a tight contact with the equipment. This reduces the relative sliding between the strip steel and the equipment, avoids damage to the strip steel surface caused by friction due to sliding, and protects the surface quality of the strip steel. The uncoiler reverses under the action of the tensioning torque and outputs the initial uncoiling tension, ensuring the stability and continuity of the uncoiling tensioning power and the basic tension. This allows the strip steel to smoothly transition from a relaxed state to a tensioned state, avoiding stress damage or plastic deformation of the high-strength strip steel due to instantaneous changes in power or tension. This adapts to the mechanical properties of high-strength strip steel and monitors the uncoiling process in real time. During the tensioning process, the uncoiling length of the strip is segmented according to the distance from the uncoiler, and the rollers are driven at different speeds and rotated synchronously. This ensures that the strip remains taut during rewinding, preventing the outer coil from loosening. The uncoiling length of the strip is monitored in real time, and the number of remaining coils is determined based on the uncoiling length. The uncoiling tension and the expansion mode of the mandrel are adjusted accordingly based on the number of remaining coils. This avoids the strip and mandrel being too tightly or too loosely fitted due to a fixed expansion mode, reducing abnormal stress between strip layers and between the strip and the mandrel. This further reduces the probability of interlayer misalignment, thereby improving the yield of strip production.

[0061] The following describes an embodiment of the apparatus described in this application, which can be used to execute the uncoiling control method for high-strength strip steel described in the above embodiments of this application. For details not disclosed in the apparatus embodiments of this application, please refer to the embodiments of the uncoiling control method for high-strength strip steel described in the above applications.

[0062] Figure 3 A block diagram of an uncoiling control device for high-strength strip steel according to one embodiment of this application is shown.

[0063] Reference Figure 3 According to one embodiment of the present application, a high-strength strip uncoiling control device 300 includes: a clamping unit 301, a first control unit 302, a determining unit 303, and a second control unit 304.

[0064] The unit includes a pressing unit 301, which presses down the straightener and multiple pinch rolls between the uncoiler and the welding machine to press the strip after welding is completed at the welding machine; a first control unit 302, which controls the uncoiler to reverse under the tensioning torque, outputs the initial uncoiling tension, and divides the straightener and multiple pinch rolls into a first roll group and a second roll group according to their distance from the uncoiler, and controls the first roll group and the second roll group to reverse synchronously with the uncoiler according to the first driving speed and the second driving speed, respectively; a determining unit 303, which tracks the uncoiling length of the strip during the uncoiling tensioning process in real time and determines the number of remaining turns of the strip on the uncoiler mandrel based on the uncoiling length; and a second control unit 304, which controls the uncoiling tension output by the uncoiler and the expansion mode of the uncoiler mandrel based on the number of remaining turns.

[0065] In some embodiments of this application, based on the foregoing scheme, the first control unit 302 is configured to: divide the uncoiler pinch roll and the straightener that are closer to the uncoiler into a first roll group; and divide the intermediate pinch roll and the take-off pinch roll that are farther from the uncoiler into a second roll group.

[0066] In some embodiments of this application, based on the foregoing scheme, the first control unit 302 is further configured to: control the uncoiling pinch roll and the straightening machine in the first roll group to rotate synchronously with the uncoiler at a first driving speed, wherein the first driving speed is slower than the reversing speed of the uncoiler by a first preset ratio; and control the intermediate pinch roll and the starting pinch roll in the second roll group to rotate synchronously with the uncoiler at a second driving speed, wherein the second driving speed is slower than the reversing speed of the uncoiler by a second preset ratio.

[0067] In some embodiments of this application, based on the aforementioned scheme, the first preset ratio is 4% to 5%, and the second preset ratio is 8% to 10%.

[0068] In some embodiments of this application, based on the foregoing scheme, the second control unit 304 is configured to: if the remaining number of turns decreases to a first preset number of turns, control the unwinding tension output by the uncoiler to decrease to a third preset ratio of the initial unwinding tension, and turn off the uncoiler mandrel expansion mode to keep the current outer diameter of the mandrel unchanged; if the remaining number of turns decreases to a second preset number of turns, control the unwinding tension output by the uncoiler to decrease to a fourth preset ratio of the initial unwinding tension, and turn off the uncoiler mandrel expansion mode to keep the current outer diameter of the mandrel unchanged, wherein the second preset number of turns is less than the first preset number of turns, and the fourth preset ratio is less than the third preset ratio.

[0069] In some embodiments of this application, based on the aforementioned scheme, the first preset number of revolutions is 8 to 12 revolutions, and the second preset number of revolutions is 6 to 3 revolutions.

[0070] In some embodiments of this application, based on the foregoing scheme, the third preset ratio is 45% to 55%, and the fourth preset ratio is 35% to 25%.

[0071] Based on the same inventive concept, embodiments of this application provide a computer program product, the computer program product including computer instructions stored in a computer-readable storage medium and adapted to be read and executed by a processor to cause a computer device having the processor to perform the operations performed as described above.

[0072] Based on the same inventive concept, embodiments of this application provide a computer-readable storage medium storing at least one computer program instruction, which is loaded and executed by a processor to perform the operations described above.

[0073] Figure 4 A schematic diagram of the structure of an electronic device according to one embodiment of this application is shown.

[0074] Based on the same inventive concept, embodiments of this application also provide an electronic device. (Reference) Figure 4 The diagram shows a schematic of the structure of an electronic device according to an embodiment of this application. The electronic device includes one or more memories 404, one or more processors 402, and at least one computer program (program code) stored in the memory 404 and executable on the processor 402. When the processor 402 executes the computer program, it implements the method described above.

[0075] Among them, Figure 4In this document, a bus architecture (represented by bus 400) is used. Bus 400 may include any number of interconnected buses and bridges, linking various circuits including one or more processors represented by processor 402 and memory represented by memory 404. Bus 400 may also link various other circuits such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art and therefore will not be described further herein. Bus interface 405 provides an interface between bus 400 and receiver 401 and transmitter 403. Receiver 401 and transmitter 403 may be the same element, i.e., a transceiver, providing a unit for communicating with various other devices over a transmission medium. Processor 402 is responsible for managing bus 400 and general processing, while memory 404 can be used to store data used by processor 402 during operation.

[0076] The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored as one or more instructions or codes on or transmitted via a computer-readable medium. Other examples and embodiments are within the scope and spirit of this application and the appended claims. For example, due to the nature of software, the functions described above may be implemented using software executed by a processor, hardware, firmware, hardwired, or any combination thereof. Furthermore, the functional units may be integrated into a single processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit.

[0077] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of units can be a logical functional division, and in actual implementation, there may be other division methods. For instance, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual coupling, direct coupling, or communication connection may be through some interfaces; the indirect coupling or communication connection between units or modules may be electrical or other forms.

[0078] The units described as separate components may or may not be physically separate. Similarly, the components of the control device may or may not be physical units; they may be located in one place or distributed across multiple units. Some or all of the units can be selected to achieve the purpose of this embodiment, depending on actual needs.

[0079] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as a USB flash drive, read-only memory (ROM), random access memory (RAM), portable hard drive, magnetic disk, or optical disk.

[0080] The above description is merely an embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A method for controlling the uncoiling of high-strength strip steel, characterized in that, The method includes: After the strip steel is welded at the welding machine, the straightening machine and multiple pinch rolls between the uncoiler and the welding machine are pressed down to tighten the strip steel; The uncoiler is controlled to reverse under the action of the tensioning torque to output the initial uncoiling tension. At the same time, the straightening machine and multiple pinch rolls are divided into a first roll group and a second roll group according to their distance from the uncoiler. The first roll group and the second roll group are controlled to reverse synchronously with the uncoiler according to the first driving speed and the second driving speed, respectively. The uncoiling length of the strip is tracked in real time during the uncoiling and tensioning process, and the remaining number of coils of strip on the uncoiling mandrel is determined based on the uncoiling length. Based on the remaining number of turns, the unwinding tension output by the uncoiler is controlled, as well as the expansion mode of the uncoiler mandrel is controlled.

2. The method according to claim 1, characterized in that, The step of dividing the straightening machine and multiple pinch rollers into a first roller group and a second roller group according to their distance from the uncoiler includes: The uncoiler pinch roll and the straightener that are closer to the uncoiler are divided into the first roll group; The intermediate pinch rolls and the take-off pinch rolls, which are farther away from the uncoiler, are divided into a second roll group.

3. The method according to claim 2, characterized in that, The control of the first and second roller groups to rotate synchronously with the uncoiler at the first and second driving speeds, respectively, includes: The uncoiling pinch roll and the straightening machine in the first roll group are controlled to rotate synchronously with the uncoiler at a first driving speed, and the first driving speed is slower than the uncoiler's rotation speed by a first preset ratio. The intermediate pinch roll and the starting pinch roll in the second roll group are controlled to rotate in reverse synchronously with the uncoiler at a second driving speed, and the second driving speed is slower than the uncoiler's reverse speed by a second preset ratio.

4. The method according to claim 3, characterized in that, The first preset ratio is 4% to 5%, and the second preset ratio is 8% to 10%.

5. The method according to claim 1, characterized in that, The step of controlling the unwinding tension output by the uncoiler based on the remaining number of turns, and controlling the expansion mode of the uncoiler mandrel, includes: If the remaining number of turns decreases to the first preset number of turns, the unwinding tension output by the uncoiler is controlled to decrease to the third preset ratio of the initial unwinding tension, and the uncoiler mandrel expansion mode is turned off to keep the current outer diameter of the mandrel unchanged. If the remaining number of turns decreases to the second preset number of turns, the unwinding tension output by the uncoiler is controlled to decrease to the fourth preset ratio of the initial unwinding tension, and the uncoiler mandrel expansion mode is turned off to keep the current outer diameter of the mandrel unchanged. The second preset number of turns is less than the first preset number of turns, and the fourth preset ratio is less than the third preset ratio.

6. The method according to claim 5, characterized in that, The first preset number of laps is 8 to 12 laps, and the second preset number of laps is 6 to 3 laps.

7. The method according to claim 5, characterized in that, The third preset ratio is 45% to 55%, and the fourth preset ratio is 35% to 25%.

8. A high-strength strip uncoiling control device, characterized in that, The device includes: The clamping unit is used to press down the straightening machine and multiple pinch rollers between the uncoiler and the welding machine to clamp the strip steel after welding is completed at the welding machine. The first control unit is used to control the uncoiler to reverse under the action of the tensioning torque, output the initial unwinding tension, and at the same time divide the straightening machine and multiple pinch rolls into a first roll group and a second roll group according to the distance from the uncoiler, and control the first roll group and the second roll group to reverse synchronously with the uncoiler according to the first driving speed and the second driving speed, respectively. The determination unit is used to track the uncoiling length of the strip steel in real time during the uncoiling and tensioning process, and determine the number of remaining coils of strip steel on the uncoiling mandrel based on the uncoiling length; The second control unit is used to control the unwinding tension output by the uncoiler and the expansion mode of the uncoiler mandrel based on the remaining number of turns.

9. A computer-readable storage medium storing at least one computer program instruction, the at least one computer program instruction being loaded and executed by a processor to implement the method as described in any one of claims 1 to 7.

10. An electronic device, characterized in that, The electronic device includes one or more processors and one or more memories, wherein at least one piece of program code is stored in the one or more memories, and the at least one piece of program code is loaded and executed by the one or more processors to implement the method as described in any one of claims 1 to 7.

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