A control method and system for preventing flattening of the head of a rolled piece

Abstract

This invention discloses a control method for preventing flattening of the rolled piece head, relating to the field of steel production technology, and solving the technical problem that existing technologies for handling flattened round steel heads lead to steel accumulation and equipment failure. The method involves, upon receiving a bite signal, acquiring the real-time speed of the rolled piece and the bite speed of the finishing mill stand; obtaining a speed drop value based on the real-time speed of the rolled piece and the bite speed of the finishing mill stand; comparing the speed drop value with a preset speed drop threshold; and triggering a speed drop alarm and a first correction mechanism when the speed drop value exceeds the speed drop threshold. This invention also discloses a control system for preventing flattening of the rolled piece head. This invention achieves intelligent correction control of the rolling speed, reducing the risk of the rolled piece head colliding with the bite components of the finishing mill stand, and preventing flattening of the rolled piece head and scrap shearing.

Description

Technical Field

[0001] This invention relates to the field of steel production technology, and more specifically, to a control method and system for preventing the head of rolled steel pieces from flattening. Background Technology

[0002] During the rolling of round steel bars, the heads of the bars often flatten. Such finished round steel bars can only be scrapped by cutting off the head section, requiring repeated stops and adjustments during the rolling process. This situation leads to a significant reduction in yield and production interruptions, resulting in a severe decrease in output. Current technology mainly involves a series of process operations and on-site adjustments after the head flattens, but this technology lacks direction and systematic approach, resulting in ineffective adjustments and prolonged production interruptions. Therefore, the current technology has significant drawbacks and defects, specifically in the following aspects: First, the process operations and on-site adjustments after head flattening cause repeated fluctuations in the production process with unstable results, leading to significant fluctuations in finished product quality and ultimately a decrease in product quality. Second, the process operations and on-site adjustments after head flattening cause deviations and fluctuations in related parameters and variables, leading to steel stockpiling, equipment failure, and prolonged production interruptions, resulting in reduced output and increased overall energy consumption per ton of steel. Finally, after the head flattens out, a series of process operations and on-site adjustments are carried out. Since production rolling is underway on-site, the above operations are not only ineffective, but also greatly increase the safety risks for on-site process personnel and equipment inspection and maintenance personnel, thereby greatly reducing the safety controllability of the production process and equipment inspection and maintenance process. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a control method and system for preventing the head of rolled steel from flattening, which addresses the shortcomings of the existing technology and solves the technical problem that the existing technology for handling the head of round steel flattening will cause steel piling and equipment failure.

[0004] The present invention discloses a control method for preventing flattening of the head of a rolled piece, the method comprising:

[0005] Upon receiving a bite signal, the real-time speed of the rolled piece and the bite speed of the finishing mill stand are obtained. Based on the real-time speed of the rolled piece and the bite speed of the finishing mill stand, a speed drop value is obtained. The speed drop value is compared with a preset speed drop threshold. When the speed drop value is greater than the speed drop threshold, a speed drop alarm is triggered and the first correction mechanism is activated.

[0006] The real-time height of the workpiece on the rolling mill is obtained, and the difference between the real-time height and the preset height limit is used to obtain the real-time allowance height of the workpiece. When the real-time allowance height of the workpiece is greater than the preset height allowance limit, a workpiece height alarm is triggered and a second correction mechanism is activated.

[0007] The real-time tension value of the rolled piece is obtained. When the real-time tension value of the rolled piece is greater than the preset tension threshold, a tension alarm is triggered and a third correction mechanism is activated.

[0008] With further improvement, the expression for obtaining the rapid drop value is:

[0009] ;

[0010] Where V0 is the real-time speed of the rolled piece, V1 is the bite speed of the finishing mill stand, V2 is the speed drop value, and a is the speed coefficient.

[0011] Furthermore, the first correction mechanism is to obtain a speed drop correction value by subtracting the speed drop value from the speed drop threshold, obtain a corrected speed of the rolling mill by subtracting the speed drop correction value from the real-time speed of the rolling mill, and set the corrected speed of the rolling mill as the real-time speed of the rolling mill.

[0012] Furthermore, the second correction mechanism is to increase the gap between the rolls to reduce the real-time height of the workpiece on the mill, so that the real-time allowance height of the workpiece is less than a preset height allowance limit.

[0013] Furthermore, the third correction mechanism is to reduce the real-time speed of the rolling mill to reduce the real-time tension value of the rolling mill, so that the real-time tension value of the rolling mill is less than the tension threshold.

[0014] A control system for preventing flattening of the head of a rolled piece, the system comprising:

[0015] The first speed sensor is used to acquire the speed of the rolled piece and output the speed signal of the rolled piece;

[0016] The second speed sensor is used to collect the biting speed of the finishing mill stand and output the biting speed signal of the rolled piece.

[0017] A height sensor is used to acquire the height of the workpiece on the rolling mill and output the height signal of the workpiece.

[0018] A tension sensor is used to acquire the tension value of the rolled piece and output the tension signal;

[0019] The controller is used to receive the speed signal of the rolled piece, the bite speed signal of the rolled piece, the height signal of the rolled piece, and the tension signal;

[0020] The controller uses the above-mentioned control method to prevent the head of the rolled piece from flattening by controlling the rolling mill through speed signals, the bite speed signal of the rolled piece, the height signal of the rolled piece, and tension signals.

[0021] Beneficial effects

[0022] The advantages of this invention are:

[0023] 1. This invention obtains the real-time speed of the rolled piece and the biting speed of the finishing mill stand, obtains the speed drop value based on the real-time speed of the rolled piece and the biting speed of the finishing mill stand, and triggers an alarm and a first correction mechanism based on the abnormal speed drop value, thereby realizing intelligent correction control of the rolling speed, reducing the risk of the rolled piece head colliding with the biting components of the finishing mill stand, and preventing the rolled piece head from flattening and being scrapped.

[0024] 2. This invention obtains the real-time height of the workpiece on the rolling mill, issues an alarm for abnormal real-time height, and triggers a second correction mechanism, thereby achieving optimal control of the head height adjustment of the workpiece and preventing the head of the workpiece from flattening during rolling due to excessive height on the rolling mill.

[0025] 3. This invention obtains the real-time tension value of the rolled piece, alarms for abnormal real-time tension values ​​and triggers a third correction mechanism to achieve tension correction and control, thereby avoiding the situation where the head of the rolled piece flattens due to excessive tension. Attached Figure Description

[0026] Figure 1 This is a flowchart of the control method for preventing the head of the rolled piece from flattening according to the present invention. Detailed Implementation

[0027] The present invention will be further described below with reference to embodiments, but this does not constitute any limitation on the present invention. Any limited modifications made by any person within the scope of the claims of the present invention are still within the scope of the claims of the present invention.

[0028] See Figure 1 The present invention provides a control method for preventing the head of a rolled piece from flattening. The method is as follows:

[0029] Upon receiving a bite signal, the real-time speed of the rolled piece and the bite speed of the finishing mill stand are obtained. Based on the real-time speed of the rolled piece and the bite speed of the finishing mill stand, a speed drop value is obtained. The speed drop value is compared with a preset speed drop threshold. When the speed drop value is greater than the speed drop threshold, a speed drop alarm is triggered and the first correction mechanism is activated.

[0030] The expression for obtaining the rate of decrease is:

[0031] ;

[0032] Where V0 is the real-time speed of the rolled piece, V1 is the bite speed of the finishing mill stand, V2 is the speed drop value, and a is the speed coefficient.

[0033] The first correction mechanism involves subtracting the rate drop value from the rate drop threshold to obtain the rate drop correction value, then subtracting the real-time speed of the rolled piece from the rate drop correction value to obtain the corrected speed of the rolled piece, and finally setting the corrected speed of the rolled piece as its real-time speed. This achieves intelligent correction control of the rolling speed, reducing the risk of the rolled piece head colliding with the finishing mill stand's steel-biting components and preventing the rolled piece head from flattening and scrapping.

[0034] The real-time height of the workpiece on the rolling mill is obtained. The difference between the real-time height and the preset height limit is used to obtain the real-time allowance height of the workpiece. When the real-time allowance height of the workpiece is greater than the preset height limit, a workpiece height alarm is triggered and the second correction mechanism is activated.

[0035] The second correction mechanism increases the gap between the rolls to reduce the real-time height of the workpiece on the mill, ensuring that the real-time allowance height of the workpiece is less than the preset height allowance limit. This achieves optimized control of the workpiece head height adjustment, preventing the workpiece head from flattening during rolling due to excessive height on the mill.

[0036] The real-time tension value of the rolled piece is obtained. When the real-time tension value of the rolled piece is greater than the preset tension threshold, a tension alarm is triggered and the third correction mechanism is activated.

[0037] The third correction mechanism involves reducing the real-time speed of the rolled piece to decrease its real-time tension value, ensuring that the real-time tension value is below the tension threshold. This achieves corrective control of the tension, preventing the rolled piece from flattening at the head and being scrapped due to excessive tension.

[0038] A control system for preventing flattening of the head of a rolled piece, the system comprising:

[0039] The first speed sensor is used to acquire the speed of the rolled piece and output the speed signal of the rolled piece.

[0040] The second speed sensor is used to collect the biting speed of the finishing mill stand and output the biting speed signal of the rolled piece.

[0041] A height sensor is used to acquire the height of the workpiece on the rolling mill and output the height signal of the workpiece.

[0042] Tension sensors are used to collect the tension value of rolled parts and output tension signals.

[0043] The controller is used to receive the speed signal of the rolled piece, the bite speed signal of the rolled piece, the height signal of the rolled piece, and the tension signal.

[0044] The controller uses the above-mentioned control method to prevent the head of the rolled piece from flattening by controlling the rolling mill through speed signals, the bite speed signal of the rolled piece, the height signal of the rolled piece, and tension signals.

[0045] This system is equipped with a first speed sensor, a second speed sensor, a height sensor, a tension sensor, and a controller to achieve intelligent correction control of the rolling speed, reducing the risk of the workpiece head colliding with the finishing mill stand's biting components and preventing the workpiece head from flattening. It also achieves optimized control of the workpiece head height adjustment, preventing flattening of the workpiece head during rolling due to excessive height on the mill. Finally, it implements corrective control of tension to avoid flattening of the workpiece head due to excessive tension.

[0046] The above description is only a preferred embodiment of the present invention. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of the present invention, and these will not affect the effectiveness of the implementation of the present invention or the practicality of the patent.

Claims

1. A control method for preventing the head of a rolled piece from flattening, characterized in that, The method is as follows: Upon receiving a bite signal, the real-time speed of the rolled piece and the bite speed of the finishing mill stand are obtained. Based on the real-time speed of the rolled piece and the bite speed of the finishing mill stand, a speed drop value is obtained. The speed drop value is compared with a preset speed drop threshold. When the speed drop value is greater than the speed drop threshold, a speed drop alarm is triggered and the first correction mechanism is activated. The real-time height of the workpiece on the rolling mill is obtained, and the difference between the real-time height and the preset height limit is used to obtain the real-time allowance height of the workpiece. When the real-time allowance height of the workpiece is greater than the preset height allowance limit, a workpiece height alarm is triggered and a second correction mechanism is activated. The real-time tension value of the rolled piece is obtained. When the real-time tension value of the rolled piece is greater than the preset tension threshold, a tension alarm is triggered and a third correction mechanism is activated. The expression for obtaining the rate of decrease is: Where V0 is the real-time speed of the rolled piece, V1 is the bite speed of the finishing mill stand, V2 is the speed drop value, and a is the speed coefficient.

2. The control method for preventing flattening of the head of a rolled piece according to claim 1, characterized in that, The first correction mechanism is to obtain a speed drop correction value by subtracting the speed drop value from the speed drop threshold, obtain a corrected speed of the rolling mill by subtracting the speed drop correction value from the real-time speed of the rolling mill, and set the corrected speed of the rolling mill as the real-time speed of the rolling mill.

3. The control method for preventing flattening of the head of a rolled piece according to claim 1, characterized in that, The second correction mechanism is to increase the gap between the rolls to reduce the real-time height of the workpiece on the mill, so that the real-time allowance height of the workpiece is less than the preset height allowance limit.

4. The control method for preventing flattening of the head of a rolled piece according to claim 1, characterized in that, The third correction mechanism is to reduce the real-time speed of the rolling mill to reduce the real-time tension value of the rolling mill, so that the real-time tension value of the rolling mill is less than the tension threshold.

5. A control system for preventing the head of a rolled piece from flattening, characterized in that, The system includes: The first speed sensor is used to acquire the speed of the rolled piece and output the speed signal of the rolled piece; The second speed sensor is used to collect the biting speed of the finishing mill stand and output the biting speed signal of the rolled piece. A height sensor is used to acquire the height of the workpiece on the rolling mill and output the height signal of the workpiece. A tension sensor is used to acquire the tension value of the rolled piece and output a tension signal; The controller is used to receive the speed signal of the rolled piece, the bite speed signal of the rolled piece, the height signal of the rolled piece, and the tension signal; The controller uses a control method for preventing flattening of the rolled piece head as described in any one of claims 1-4 to control the rolling mill to prevent flattening of the rolled piece head by means of speed signals, rolling piece bite speed signals, rolling piece height signals and tension signals.

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