Transmission cascade speed regulation wire rod low-energy-consumption rolling method and transmission cascade speed regulation wire rod low-energy-consumption rolling system

Abstract

The invention discloses a low-energy-consumption wire rolling method and system for transmission cascade speed regulation, belongs to the technical field of metal rolling control, and aims to solve the problem that energy consumption is high due to the fact that an existing loop and cascade speed regulation are independent in control and lack of collaborative optimization. A real-time loop energy flow closed-loop regulation ratio is defined as a core performance index. And by taking the index as feedback, the proportional gain of the loop height controller and the loop compensation gain in the cascade speed regulation system are synchronously and adaptively adjusted. The method forces the loop system to operate at the highest energy efficiency, thereby minimizing the dynamic regulation loss and oscillation energy consumption of the transmission system, while maintaining the global stability of the speed chain through a gain coordination mechanism. The energy consumption in the rolling process is remarkably reduced, and the control quality is comprehensively improved.

Description

Technical Field

[0001] This invention belongs to the field of metal rolling control technology, and particularly relates to a low-energy-consumption wire rolling method and system with cascaded speed regulation. Background Technology

[0002] In existing technologies, wire rod finishing mills generally employ a cascaded speed control system and install loopers between stands to absorb tension fluctuations. To maintain stable looper height, conventional methods use an independent looper height closed-loop controller (such as a PID controller), whose proportional gain is usually set empirically or subjected to limited adaptive tuning. Simultaneously, the cascaded speed control system proportionally compensates for upstream stand speed deviations based on the looper height, a process known as "looper compensation." This compensation gain is also often a fixed value or manually adjusted within a small range.

[0003] However, the aforementioned existing technologies have significant drawbacks: looper height control and cascaded speed regulation are relatively independent, lacking a unified, synergistic optimization index that can quantify the overall operational efficiency of the tension buffer system. Existing methods cannot distinguish whether the looper's movement "precisely and effectively" absorbs tension fluctuations or "over- or under-adjusts," introducing additional energy losses. This makes it difficult for the control system to maintain optimal performance under dynamically changing rolling conditions, often resulting in suboptimal states of under-control (causing tension shocks and increasing transmission load) or over-control (causing looper and speed chain oscillations and generating ineffective work), thus limiting further reductions in overall energy consumption. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a low-energy-consumption wire rolling method and system with cascaded transmission speed regulation, thus solving the aforementioned problems.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a low-energy-consumption wire rod rolling method with cascaded speed regulation, comprising:

[0006] S1. Obtain adjacent racks and During the assessment period The theoretical flow rate difference per second within the range, and based on the theoretical flow rate difference per second and the target tensile stress Obtain the corresponding sliding sleeve Theoretical energy absorption / release required to completely eliminate tension fluctuations Meanwhile, according to the sliding sleeve The implementing agency during the assessment period Internal bearing force and its displacement change Obtain the sliding sleeve Actual energy absorbed / released ;

[0007] S2, based on the sliding sleeve in S1 Theoretical absorption / release of energy and actual absorption / release of energy, obtained;

[0008] S3, the sliding sleeve obtained in step S2 Real-time sliding sleeve energy flow closed-loop control ratio As feedback quantities, the proportional gain of the sleeve height controller is respectively... The sleeve compensation gain of the corresponding sliding sleeve in the cascaded speed control system of the transmission Make adjustments;

[0009] S4. Adjust the proportional gain of the sliding sleeve height controller after step S3. The sleeve compensation gain of the corresponding sliding sleeve in the cascaded speed control system of the transmission The control is applied to the preset sleeve height closed-loop controller and the preset transmission cascade speed regulation system respectively to coordinate the control of the finishing mill; and then returns to step S1 to perform the cycle.

[0010] Based on the above technical solutions, the present invention also provides the following optional technical solutions:

[0011] Further technical solution: In step S1, the sliding sleeve... The formula for calculating the theoretical energy absorbed / released to completely eliminate tension fluctuations is as follows:

[0012]

[0013] in, Indicates the sliding sleeve Theoretically, the energy absorbed / released is required to completely eliminate tension fluctuations. This represents the total number of sampling points within the assessment period. Indicates at the sampling time Adjacent racks and The theoretical difference in flow rate per second between them Indicates the target tensile stress. Sampling time interval, This represents the absolute value operator.

[0014] Further technical solution: In step S1, adjacent racks and The formula for calculating the theoretical difference in flow rate per second is:

[0015]

[0016] in, Indicates adjacent racks and The theoretical per-second flow difference between the racks represents the rack's capacity. The linear speed of the rolls, Indicates rack The theoretical cross-sectional area of ​​the rolled piece at the exit point, Indicates rack The linear speed of the rolls, Indicates rack The theoretical cross-sectional area of ​​the rolled piece at the exit.

[0017] Further technical solution: In step S1, the sliding sleeve... Actual energy absorbed / released The calculation formula is:

[0018]

[0019] in, Indicates the sliding sleeve The actual energy absorbed / released. This represents the total number of sampling points within the assessment period. Indicates at the sampling time Time Slipper The forces borne by the implementing agency Indicates the sampling interval Inner Sliding Sleeve The amount of displacement change of the actuator. This represents the absolute value operator.

[0020] Further technical solution: In step S3, adjust the proportional gain of the sliding sleeve height controller. The adjustment formula is:

[0021]

[0022] in, This indicates the proportional gain after adjustment in the next control cycle. This represents the proportional gain for the current control cycle. This indicates the preset sensitivity adjustment coefficient and , Indicates the sliding sleeve Real-time sliding sleeve energy flow closed-loop control ratio.

[0023] Further technical solution: In step S3, the compensation gain in the cascaded transmission speed regulation system is adjusted. The adjustment formula is:

[0024]

[0025] in, This indicates the overlay gain after adjustment in the next control cycle. This represents the overlay gain for the current control cycle. Indicates the sliding sleeve Real-time sliding sleeve energy flow closed-loop control ratio, Indicates the preset stabilization offset and .

[0026] Further technical solution: In step S1, the sliding sleeve... Real-time sliding sleeve energy flow closed-loop control ratio The calculation formula is:

[0027]

[0028] in, Indicates the sliding sleeve Real-time sliding sleeve energy flow closed-loop control ratio, Indicates the sliding sleeve The actual energy absorbed / released. Indicates the sliding sleeve Theoretically, it absorbs / releases energy.

[0029] A low-energy-consumption wire rod rolling system with cascaded speed regulation, employing the aforementioned low-energy-consumption wire rod rolling method with cascaded speed regulation, includes:

[0030] The energy flow calculation module is used to execute steps S1 and S2 to calculate the theoretical energy, actual energy, and control ratio.

[0031] The adaptive optimization module is used to execute step S3, adjusting the control parameters according to the control ratio;

[0032] The collaborative control execution module is used to execute step S4 and apply optimized parameters to control the rolling process.

[0033] A further technical solution: The energy flow calculation module, adaptive optimization module, and collaborative control execution module are integrated into the automated control system of the finishing mill.

[0034] This invention provides a low-energy-consumption wire rolling method and system with cascaded speed regulation, which has the following advantages compared with the prior art:

[0035] 1. This invention enables the looper system to operate at near-theoretical optimal energy efficiency, thereby minimizing dynamic losses and ineffective work of the transmission system caused by tension fluctuations and speed oscillations, and achieving low-energy-consumption operation of the rolling process under all working conditions.

[0036] 2. This invention breaks down the information silos between loop control and cascade speed regulation, and uses a unified energy flow efficiency index to drive the parameters of the two subsystems to adapt collaboratively, thereby improving the overall control quality.

[0037] 3. This invention can automatically adapt to changes in different steel types, specifications, and equipment conditions, maintaining efficient and stable control performance at all times, and reducing reliance on human experience;

[0038] 4. This invention, through its unique loop compensation gain adjustment logic, can automatically attenuate the interference of the loop control on the main speed chain when the loop control performance is poor, effectively isolate local disturbances, and ensure the overall operational stability of the cascade transmission system. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of the process of the present invention. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0041] The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

[0042] Please see Figure 1 According to one embodiment of the present invention, a low-energy-consumption wire rolling method with cascaded speed regulation includes:

[0043] S1. Obtain adjacent racks and During the assessment period The theoretical flow rate difference per second within the range, and based on the theoretical flow rate difference per second and the target tensile stress Obtain the corresponding sliding sleeve The theoretical energy absorbed / released to completely eliminate tension fluctuations (the absorbed / released energy is a positive scalar value reflecting the total work done by the sliding sleeve actuator during the assessment cycle). Meanwhile, according to the sliding sleeve The implementing agency during the assessment period Internal bearing force and its displacement change Obtain the sliding sleeve Actual energy absorbed / released ;

[0044] S2, based on the sliding sleeve in S1 The theoretical and actual absorbed / released energy are used to obtain the sliding sleeve. Real-time sliding sleeve energy flow closed-loop control ratio The calculation formula is as follows:

[0045]

[0046] in, Indicates the sliding sleeve Real-time sliding sleeve energy flow closed-loop control ratio, Indicates the sliding sleeve The actual energy absorbed / released. Indicates the sliding sleeve Theoretical absorption / release of energy;

[0047] S3, the sliding sleeve obtained in step S2 Real-time sliding sleeve energy flow closed-loop control ratio As feedback quantities, the proportional gain of the sleeve height controller is respectively... The sleeve compensation gain of the corresponding sliding sleeve in the cascaded speed control system of the transmission Make adjustments;

[0048] S4. Adjust the proportional gain of the sliding sleeve height controller after step S3. The sleeve compensation gain of the corresponding sliding sleeve in the cascaded speed control system of the transmission The control is applied to the preset sleeve height closed-loop controller and the preset transmission cascade speed regulation system respectively to coordinate the control of the finishing mill; and then returns to step S1 to perform the cycle.

[0049] The following example will provide a more detailed explanation of the above technical solution:

[0050] Suppose that in a wire rod finishing mill, user A is rolling wire of a specific specification. The mill contains multiple rolling stands, where adjacent stands... and A sliding sleeve is installed between them. During the rolling process, the flow rate of the rolled material between stands may change instantaneously due to factors such as the characteristics of the rolled material, roll wear, and temperature fluctuations, which can cause tension fluctuations.

[0051] First, in step S1, the system will set an assessment cycle. For example, within a 10-second assessment cycle, the system continuously monitors and calculates adjacent racks. and The theoretical difference in flow rate per second between them Specifically, the system will acquire rack data in real time. and Roll linear speed , and the theoretical cross-sectional area at the exit of the rolled piece , And based on these parameters, the instantaneous flow difference is calculated. For example, at a certain moment... ,if The flow rate is slightly greater than The traffic, A positive value indicates a tendency for the rolled piece to accumulate between the stands. Simultaneously, the system presets a target tensile stress. For example, 100MPa. Based on these real-time flow differences and target tensile stress, the system calculates the sliding sleeve. Theoretical energy absorption / release required to completely eliminate these tension fluctuations .Should This represents the work that the sliding sleeve should perform under ideal conditions to maintain the stability of the tension between the frames.

[0052] At the same time, the system will also monitor the sliding sleeve in real time. Based on the actual operating conditions, the system can obtain the actuator's status during the assessment cycle through force sensors and displacement sensors installed on the sliding sleeve actuator. Internal bearing force and its displacement change For example, when the sliding sleeve arm is raised, the displacement change is positive, and the force is the force resisting tension; when the sliding sleeve arm is lowered, the displacement change is negative, and the force is the force releasing tension. The system integrates or accumulates these real-time data to calculate the sliding sleeve's displacement. Actual energy absorbed / released during the assessment period .Should This reflects the actual amount of work done by the sliding sleeve.

[0053] Next, in step S2, the system will use the theoretical absorbed / released energy obtained in step S1. and actual absorption / release of energy The comparisons were made, and the real-time sliding sleeve energy flow closed-loop control was calculated. For example, if much smaller ,but A value less than 1 indicates that the sliding sleeve is not performing sufficient work to eliminate tension fluctuations, potentially indicating under-adjustment of control. Much larger ,but A value greater than 1 may indicate excessive movement of the sliding sleeve, introducing additional energy loss. The value provides a quantitative indicator for evaluating the working efficiency and energy utilization of the sliding sleeve.

[0054] Subsequently, in step S3, the real-time sliding sleeve energy flow closed-loop control ratio is used. As feedback, the system adaptively adjusts key gain parameters in the sliding sleeve height controller and the cascaded speed control system. Specifically, the proportional gain of the sliding sleeve height controller... According to Adjust the size. For example, when When the deviation from the ideal value of 1, This will be increased or decreased accordingly to enable the sleeve height controller to respond more effectively to sleeve height deviations. Simultaneously, the sleeve compensation gain corresponding to the sleeve in the cascaded speed control system will also be adjusted. Also according to Make adjustments. For example, when At lower speeds, it may be necessary to increase the compensation gain to enhance the compensation effect of the cascaded speed control system on the upstream rack speed, thereby more actively suppressing tension fluctuations.

[0055] Finally, in step S4, these adjusted scaling gains are... and compensation gain The system is applied in real-time to a pre-set closed-loop controller for the sleeve height and a pre-set cascaded speed control system for the drive. These two controllers work together to provide overall control of the finishing mill. The sleeve height closed-loop controller maintains a stable sleeve height, while the cascaded speed control system coordinates the flow between stands through speed compensation, jointly suppressing tension fluctuations. After completing one assessment cycle, the system returns to step S1 and repeats the above process, thereby achieving continuous optimization and adaptive adjustment of the rolling process. Through this closed-loop feedback mechanism, the system can dynamically adjust control parameters based on the real-time energy flow assessment results, ensuring that the sleeve always operates at optimal efficiency, thus achieving the low-energy consumption target of wire rod rolling.

[0056] Based on the above examples, the technical concept of this embodiment demonstrates a significant technical contribution. In the prior art, as mentioned in the background section, looper height control and cascade speed adjustment are usually relatively independent, with their gain parameters mostly set empirically or adjusted to a limited extent adaptively. This separate control method lacks a unified, quantitative indicator to evaluate the operational efficiency of the entire tension buffering system. For example, in the rolling process described above, if the controller is adjusted solely based on the traditional looper height deviation, it may be impossible to distinguish whether the sliding sleeve action accurately and effectively absorbs tension fluctuations or whether over-adjustment or under-adjustment introduces additional energy loss.

[0057] In contrast, this embodiment introduces a real-time sliding sleeve energy flow closed-loop control ratio. This innovative indicator provides a quantitative means of evaluating the working efficiency and energy utilization of a sliding sleeve. This ratio directly reflects the relationship between the actual work done by the sliding sleeve and the theoretically required work, thus enabling precise judgment of whether the sliding sleeve is under-controlled or over-controlled. For example, when... When the deviation from the ideal value of 1 is reached, the system can clearly identify the existence of energy loss or ineffective work.

[0058] Furthermore, in this embodiment, the closed-loop control ratio of the energy flow is... As a feedback quantity, the proportional gain of the sleeve height controller The compensation gain in a cascaded speed control system Coordinated adaptive adjustment is performed. This gain adjustment mechanism based on energy flow assessment overcomes the limitations of existing technologies where gain parameter settings lack a basis and are difficult to adapt to dynamic operating conditions. By dynamically adjusting these two key gains, the system can achieve deep coupling and coordinated optimization of looper height control and cascaded speed regulation. For example, when When the slip sleeve is not working sufficiently, the system can simultaneously increase the proportional gain of the slip sleeve height controller and the compensation gain of the cascaded speed control system to respond more actively to tension fluctuations, thereby avoiding tension shocks and increased transmission load. Conversely, when... This indicates that when the sliding sleeve is over-operated, the system can reduce the gain accordingly to avoid oscillation between the sleeve and the speed chain, thereby reducing unnecessary power consumption.

[0059] Therefore, the technical solution of this embodiment provides a more refined and efficient wire rod rolling control strategy. By constructing an energy flow closed-loop regulation mechanism, it achieves coordinated control of the finishing mill, enabling the sliding sleeve to operate at near-optimal efficiency, effectively suppressing tension fluctuations and reducing ineffective power consumption. This method not only improves the stability of the rolling process but also provides solid technical support for achieving the low-energy consumption target of wire rod rolling, demonstrating significant progress.

[0060] Preferably, in step S1:

[0061] The sliding sleeve The formula for calculating the theoretical energy absorbed / released to completely eliminate tension fluctuations is as follows:

[0062]

[0063] in, Indicates the sliding sleeve Theoretically, the energy absorbed / released is required to completely eliminate tension fluctuations. This represents the total number of sampling points within the assessment period. Indicates at the sampling time Adjacent racks and The theoretical difference in flow rate per second between them Indicates the target tensile stress. Sampling time interval, This represents the absolute value operator;

[0064] Adjacent racks and The formula for calculating the theoretical difference in flow rate per second is:

[0065]

[0066] in, Indicates adjacent racks and The theoretical per-second flow difference between the racks represents the rack's capacity. The linear speed of the rolls, Indicates rack The theoretical cross-sectional area of ​​the rolled piece at the exit point, Indicates rack The linear speed of the rolls, Indicates rack The theoretical cross-sectional area of ​​the rolled piece at the exit point;

[0067] The sliding sleeve Actual energy absorbed / released The calculation formula is:

[0068]

[0069] in, Indicates the sliding sleeve The actual energy absorbed / released. This represents the total number of sampling points within the assessment period. Indicates at the sampling time Time Slipper The forces borne by the implementing agency Indicates the sampling interval Inner Sliding Sleeve The amount of displacement change of the actuator. This represents the absolute value operator.

[0070] The above theory absorbs / releases energy The calculation formula is used to quantify the sliding sleeve. During the assessment period The innermost layer represents the work required to completely eliminate tension fluctuations, reflecting the impact of adjacent stands during the rolling process. and Tension fluctuations caused by flow mismatch between the two, sliding sleeves The energy required to compensate for these fluctuations through displacement can be measured by real-time monitoring of adjacent racks. and The theoretical difference in flow rate per second between them And combined with target tensile stress and sampling time interval During the assessment period The energy demand at each sampling moment is accumulated and averaged to obtain the value. Alternatively, a mathematical model of the rolling process can be pre-established, and simulation calculations can be performed on adjacent stands under different operating conditions. and The theoretical per-second flow rate difference, combined with the target tensile stress. Estimate the sliding sleeve Theoretical absorption / release of energy .

[0071] Adjacent racks and Theoretical per second flow difference The calculation formula is used to accurately calculate the relationship between adjacent stands during the rolling process. and The difference in the volumetric flow rate of metal passing between stands per unit time is the main cause of tension fluctuations in the rolled piece between stands. This flow difference can be measured in real time by the stand... and Roll linear speed and And the workpiece on the stand, as measured according to the rolling schedule or in real time. and Theoretical cross-sectional area at the exit and Alternatively, the relevant parameters can be obtained by directly substituting them into the formula for calculation. In addition, the speed sensor and workpiece size measuring device in the rolling mill control system can be used to obtain the relevant parameters and perform real-time calculation through the data processing unit.

[0072] Sliding sleeve Actual energy absorbed / released The calculation formula is used to quantify the sliding sleeve. During the assessment period The actual work performed internally reflects the sliding sleeve. In actual operation, the implementing agency withstands the test of strength. And generate displacement change The actual energy consumption or output for adjusting the tension of the rolled piece can be measured via the sleeve. Force and displacement sensors are installed on the actuator to collect the forces it experiences in real time. and at the sampling interval displacement change Then, substitute these data into the formula to calculate the average, or you can use a sliding sleeve. The electrical parameters of the drive system, such as current and voltage, combined with the motor model and mechanical transmission efficiency, are used to indirectly estimate the sliding sleeve. The work done by the actuator, thus obtaining the actual absorbed / released energy. .

[0073] As one specific implementation method, during the rolling process, a device installed on the rolling mill stand can be used. and Speed ​​sensors on the rolls are used to obtain the linear speed of the rolls in real time. and Meanwhile, by using non-contact measuring equipment such as laser diameter gauges or infrared width gauges at the workpiece exit, combined with the reduction amount set in the rolling specifications, the position of the workpiece on the stand can be measured in real time or estimated. and Theoretical cross-sectional area at the exit and This data is sent to a central control unit, which processes it according to a formula. Calculate adjacent racks and Theoretical per second flow difference For theoretical absorption / release of energy The calculation involves the control unit pre-setting a target tensile stress. For example, a specific MPa value can be set based on different steel grades and product specifications. Sampling time interval. It can be set to milliseconds, for example, 10ms. During the assessment period... Inside, the control unit will continuously collect data. The data, and according to the formula Perform cumulative and average calculations. This applies to the actual absorbed / released energy. Calculation of sliding sleeve Pressure or force sensors can be installed on the actuator to monitor the force it is subjected to in real time. Simultaneously, the displacement sensor is used to measure the sliding sleeve in real time. The displacement was calculated at each sampling interval. displacement change These forces and displacement change The data is also sent to the central control unit and processed according to the formula. Accumulation and averaging calculations are performed. In this way, accurate theoretical and actual energy values ​​can be obtained, providing a reliable input for subsequent closed-loop control.

[0074] The above technical solution precisely quantifies the sliding sleeve. Theoretical energy absorption / release required to completely eliminate tension fluctuations and sliding sleeve Actual energy absorbed / released Specifically, by using adjacent racks and Theoretical per second flow difference and target tensile stress To calculate It can accurately reflect the physical nature of the rolling process of the sliding sleeve. The energy required to maintain stable tension. Meanwhile, through a sliding sleeve-based... The force borne by the implementing agency and its displacement change To calculate It can accurately reflect the sliding sleeve. This method eliminates the work done by tension fluctuations during actual operation. This precise energy quantification method allows for subsequent calculations of the real-time sliding sleeve energy flow closed-loop control ratio. It has higher accuracy and reliability. Based on more accurate This value allows for more precise matching of the actual needs of the rolling process when adjusting the gain in the sleeve height controller and the cascaded speed control system in subsequent steps, thus significantly improving the accuracy and stability of tension control during rolling. This not only helps reduce accidents such as workpiece breakage and steel piling, improving product quality, but also optimizes the sleeve... The energy absorption / release efficiency effectively reduces energy consumption during the rolling process, achieving the goal of low-energy wire rod rolling.

[0075] Preferably, in step S3:

[0076] Proportional gain of the sliding sleeve height controller The adjustment formula is:

[0077]

[0078] in, This indicates the proportional gain after adjustment in the next control cycle. This represents the proportional gain for the current control cycle. This indicates the preset sensitivity adjustment coefficient and , Indicates the sliding sleeve Real-time sliding sleeve energy flow closed-loop control ratio;

[0079] The overlay gain in the aforementioned cascaded speed control system The adjustment formula is:

[0080]

[0081] in, This indicates the overlay gain after adjustment in the next control cycle. This represents the overlay gain for the current control cycle. Indicates the sliding sleeve Real-time sliding sleeve energy flow closed-loop control ratio, Indicates the preset stabilization offset and .

[0082] Among them, proportional gain The proportional gain is a key parameter in the closed-loop controller for the sliding sleeve height. It determines the controller's response strength to sliding sleeve height deviations. A higher proportional gain usually means a faster response speed, but may also lead to system oscillation or instability. Conversely, a lower proportional gain may cause a sluggish system response. Using the adjustment formula described above, the proportional gain can be adjusted based on the real-time energy flow closed-loop control ratio. The gain is dynamically adjusted to adapt to changes in rolling conditions, for example, when... When the value deviates from the target value, the gain can be appropriately increased or decreased to optimize the control effect of the sliding sleeve height.

[0083] Overlay gain This is a crucial parameter in a cascaded speed control system, used to compensate for deviations in roll linear speed caused by various disturbances during the rolling process (such as changes in workpiece size and temperature), thereby maintaining stable tension between stands. Properly setting this gain is essential for ensuring the smoothness of the rolling process and product quality. Using the above adjustment formula, the real-time energy flow closed-loop control ratio can be adjusted. The gain is dynamically adjusted to achieve more precise tension control.

[0084] Adjust sensitivity coefficient It is a preset positive parameter that determines the proportional gain. Closed-loop regulation ratio of energy flow The response sensitivity to the deviation. Larger deviations... The value will make The adjustments were more radical, while the smaller ones... This allows for a smoother adjustment. This coefficient can be set according to specific rolling process requirements and system dynamic characteristics to balance control response speed and stability, or obtained through expert experience or historical data regression analysis. For example, in certain operating conditions with high response speed requirements, it can be appropriately increased. Value; however, under operating conditions where high stability is required, the value can be appropriately reduced. value.

[0085] Stabilization offset It is also a preset positive parameter, whose main function is to prevent [something] from happening. When the value is too small (close to zero), the overlay gain... The adjustment formula avoids situations where the denominator approaches zero, thus preventing the calculation results from diverging or causing system instability. Meanwhile, It can also provide a base offset for adjusting the overlay gain, ensuring that even when... Even when the value is close to the ideal value of 1, fine-tuning can still be performed to maintain the robustness of the system. This parameter can be set according to the system's stability requirements, specifically through empirical assignment or regression analysis of historical data. For example, it can be set to a small positive number to maximize the accuracy of adjustment while ensuring stability.

[0086] The solution in this application introduces a sliding sleeve. Real-time sliding sleeve energy flow closed-loop control ratio As a feedback quantity, the proportional gain of the sleeve height controller is dynamically adjusted based on this. The compensation gain in a cascaded speed control system This creates an adaptive control mechanism. When When deviating from the ideal value of 1 (e.g., actual energy absorbed / released) With theoretical absorption / release of energy A mismatch indicates a deviation in the energy balance of the sliding sleeve under the current rolling conditions, requiring correction of the control parameters. Specifically, when... When the value is less than 1, it indicates that the actual energy absorption / release of the sliding sleeve is insufficient. In this case, according to the adjustment formula, the proportional gain... This will increase, making the sleeve height controller more responsive to deviations, thus more actively adjusting the sleeve height to eliminate tension fluctuations; simultaneously, the sleeve compensation gain... This will also increase and enhance the compensation capability of the cascaded speed control system for the roll linear speed, allowing for a faster restoration of tension balance between stands. Conversely, when A value greater than 1 indicates that the actual energy absorbed / released by the sliding sleeve is excessive; in this case, the proportional gain... It will decrease the overlay gain. This will also be reduced to avoid over-adjustment and maintain stable system operation. This adaptive adjustment based on the energy flow closed-loop control ratio enables the control system to sense and respond to changes in rolling conditions in real time, ensuring that the sleeve height and tension between stands are always in optimal control, thereby effectively eliminating tension fluctuations and reducing rolling energy consumption.

[0087] The following is a concrete example to illustrate this. Suppose that in a certain control cycle... In the middle, sliding sleeve Real-time sliding sleeve energy flow closed-loop control ratio The calculated value is 0.8, indicating that the actual energy absorption / release is lower than the theoretical requirement. At this point, the preset sensitivity adjustment coefficient... It can be set to 0.2, the stabilization offset. It can be set to 0.05. Then, in the next control cycle... In the middle, the proportional gain of the sliding sleeve height controller According to the formula Make adjustments, that is It will be appropriately increased. Simultaneously, the compensation gain in the cascaded transmission speed control system will be... According to the formula Make adjustments, that is The pressure will also be appropriately increased. In this way, the control system can dynamically adjust the control parameters based on the real-time energy balance to more effectively eliminate tension fluctuations and optimize the rolling process.

[0088] Through the above technical solution, the control parameters during the rolling process are no longer fixed, but can be adaptively adjusted according to real-time rolling conditions and the closed-loop energy flow control ratio. This significantly improves the robustness and adaptability of the sleeve height control and transmission cascade speed regulation system, enabling the system to maintain excellent tension control accuracy and stability even when facing changes in rolling conditions. Ultimately, this helps to more effectively eliminate tension fluctuations during wire rod rolling, reduce unnecessary energy loss, thereby achieving low-energy wire rod rolling and improving product quality.

[0089] A low-energy-consumption wire rod rolling system with cascaded speed regulation, employing the aforementioned low-energy-consumption wire rod rolling method with cascaded speed regulation, includes:

[0090] The energy flow calculation module is used to execute steps S1 and S2 to calculate the theoretical energy, actual energy, and control ratio.

[0091] The adaptive optimization module is used to execute step S3, adjusting the control parameters according to the control ratio;

[0092] The collaborative control execution module is used to execute step S4 and apply optimized parameters to control the rolling process.

[0093] The energy flow calculation module, adaptive optimization module, and collaborative control execution module are integrated into the automated control system of the finishing mill.

[0094] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus 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 apparatus.

[0095] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A low-energy-consumption wire rolling method with cascaded speed regulation, characterized in that, include: S1. Obtain adjacent racks and During the assessment period The theoretical flow rate difference per second within the range, and based on the theoretical flow rate difference per second and the target tensile stress Obtain the corresponding sliding sleeve Theoretical energy absorption / release required to completely eliminate tension fluctuations Meanwhile, according to the sliding sleeve The implementing agency during the assessment period Internal bearing force and its displacement change Obtain the sliding sleeve Actual energy absorbed / released ; S2, based on the sliding sleeve in S1 Theoretical absorption / release of energy and actual absorption / release of energy, obtained; S3, the sliding sleeve obtained in step S2 Real-time sliding sleeve energy flow closed-loop control ratio As feedback quantities, the proportional gain of the sleeve height controller is respectively... The sleeve compensation gain of the corresponding sliding sleeve in the cascaded speed control system of the transmission Make adjustments; S4. Adjust the proportional gain of the sliding sleeve height controller after step S3. The sleeve compensation gain of the corresponding sliding sleeve in the cascaded speed control system of the transmission These are respectively applied to the preset sleeve height closed-loop controller and the preset transmission cascade speed regulation system to perform coordinated control of the finishing mill unit; Then return to step S1 and repeat the process.

2. The low-energy-consumption wire rolling method with cascaded speed regulation according to claim 1, characterized in that, In step S1, the sliding sleeve The formula for calculating the theoretical energy absorbed / released to completely eliminate tension fluctuations is as follows: ； in, Indicates the sliding sleeve Theoretically, the energy absorbed / released is required to completely eliminate tension fluctuations. This represents the total number of sampling points within the assessment period. Indicates at the sampling time Adjacent racks and The theoretical difference in flow rate per second between them Indicates the target tensile stress. Sampling time interval, This represents the absolute value operator.

3. The low-energy-consumption wire rolling method with cascaded speed regulation according to claim 2, characterized in that, In step S1, adjacent racks and The formula for calculating the theoretical difference in flow rate per second is: ； in, Indicates adjacent racks and The theoretical per-second flow difference between the racks represents the rack's capacity. The linear speed of the rolls, Indicates rack The theoretical cross-sectional area of ​​the rolled piece at the exit point, Indicates rack The linear speed of the rolls, Indicates rack The theoretical cross-sectional area of ​​the rolled piece at the exit.

4. The low-energy-consumption wire rolling method with cascaded speed regulation according to claim 1, characterized in that, In step S1, the sliding sleeve Actual energy absorbed / released The calculation formula is: ； in, Indicates the sliding sleeve The actual energy absorbed / released. This represents the total number of sampling points within the assessment period. Indicates at the sampling time Time Slipper The forces borne by the implementing agency Indicates the sampling interval Inner Sliding Sleeve The amount of displacement change of the actuator. This represents the absolute value operator.

5. The low-energy-consumption wire rolling method with cascaded speed regulation according to claim 1, characterized in that, In step S3, the proportional gain of the sliding sleeve height controller is adjusted. The adjustment formula is: ； in, This indicates the proportional gain after adjustment in the next control cycle. This represents the proportional gain for the current control cycle. This indicates the preset sensitivity adjustment coefficient and , Indicates the sliding sleeve Real-time sliding sleeve energy flow closed-loop control ratio.

6. The low-energy-consumption wire rolling method with cascaded speed regulation according to claim 1, characterized in that, In step S3, the compensation gain in the cascaded transmission speed control system is adjusted. The adjustment formula is: ； in, This indicates the overlay gain after adjustment in the next control cycle. This represents the overlay gain for the current control cycle. Indicates the sliding sleeve Real-time sliding sleeve energy flow closed-loop control ratio, Indicates the preset stabilization offset and .

7. The low-energy-consumption wire rolling method with cascaded speed regulation according to claim 1, characterized in that, In step S1, the sliding sleeve Real-time sliding sleeve energy flow closed-loop control ratio The calculation formula is: ； in, Indicates the sliding sleeve Real-time sliding sleeve energy flow closed-loop control ratio, Indicates the sliding sleeve The actual energy absorbed / released. Indicates the sliding sleeve Theoretically, it absorbs / releases energy.

8. A low-energy-consumption wire rod rolling system with cascaded speed regulation, characterized in that, The low-energy-consumption wire rolling method using the cascaded speed regulation transmission method according to any one of claims 1-7 includes: The energy flow calculation module is used to execute steps S1 and S2 to calculate the theoretical energy, actual energy, and control ratio. The adaptive optimization module is used to execute step S3, adjusting the control parameters according to the control ratio; The collaborative control execution module is used to execute step S4 and apply optimized parameters to control the rolling process.

9. The low-energy-consumption wire rolling system with cascaded speed regulation according to claim 8, characterized in that, The energy flow calculation module, adaptive optimization module, and collaborative control execution module are integrated into the automated control system of the finishing mill.

Images