Rolling mill cylinder state detection method and device, computer equipment and storage medium

Abstract

The application provides a rolling mill oil cylinder state detection method and device, computer equipment and a storage medium, and relates to the field of iron and steel metallurgy.The method comprises the following steps: controlling the rolling mill oil cylinder to perform a magnetic scale calibration test to calibrate the magnetic scale; after the magnetic scale calibration test is completed, controlling the rolling mill oil cylinder to perform a deviation value test, and obtaining the position average deviation value of the rolling mill oil cylinder by using the calibrated magnetic scale; when the position average deviation value of the rolling mill oil cylinder is less than a preset deviation threshold, controlling the rolling mill oil cylinder to perform a step test, and obtaining the step average duration of the rolling mill oil cylinder; and according to the step average duration and the position average deviation value, obtaining the state of the rolling mill oil cylinder.The rolling mill oil cylinder state detection method effectively improves the rolling stability of the finishing rolling mill group, reduces the failure probability of the rolling oil cylinder, and reduces accidents, thereby reducing the time for stopping production due to the failure of the rolling oil cylinder, and improving production efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of steel smelting, in particular to a rolling mill cylinder state detection method and device, computer equipment and a storage medium. BACKGROUND

[0002] The hydraulic press-up system on the rolling mill can directly change the rolling force in a way, and the accuracy is easily affected by many factors. In order to ensure the accuracy of the strip processing, the rolling mill cylinder of the hydraulic press-up system must be dynamically adjusted under the condition of loading, which leads to the state of the rolling mill cylinder determining the accuracy of the entire system, so it is necessary to detect the state of the rolling mill cylinder.

[0003] In the prior art, only pressure test, stiffness test and other methods are generally used to qualitatively test the roll gap deviation, and then the copper bar experiment is used to verify the test results, so as to finally complete the state detection of the rolling mill cylinder in the hydraulic press-up system. It is time-consuming and laborious, and the detection accuracy is not high, and the ideal detection effect cannot be achieved. SUMMARY

[0004] The technical problem solved by the present application is that the detection of the state of the rolling mill cylinder is time-consuming and laborious, and the detection accuracy is not high, and the ideal detection effect cannot be achieved.

[0005] To solve the above problems, the present application provides a rolling mill cylinder state detection method, comprising:

[0006] controlling the rolling mill cylinder to perform a magnetic scale calibration test to calibrate the magnetic scale;

[0007] After the magnetic scale calibration test is completed, controlling the rolling mill cylinder to perform a deviation value test to obtain the position average deviation value of the rolling mill cylinder through the calibrated magnetic scale;

[0008] When the position average deviation value of the rolling mill cylinder is less than a preset deviation threshold, controlling the rolling mill cylinder to perform a step test to obtain the step average duration of the rolling mill cylinder;

[0009] According to the step average duration and the position average deviation value, the state of the rolling mill cylinder is obtained.

[0010] Optionally, the controlling the rolling mill cylinder to perform a magnetic scale calibration test to calibrate the magnetic scale comprises:

[0011] controlling the rolling mill cylinder to perform reciprocating motion at a preset speed from an initial position;

[0012] wherein the duration of each reciprocating motion is equal;

[0013] According to the reciprocating motion of the rolling mill cylinder, the phase waveform of the magnetic scale is adjusted to calibrate the magnetic scale.

[0014] Optionally, the control of the rolling mill cylinder to perform the deviation value test, the acquisition of the position average deviation value of the rolling mill cylinder by the calibrated magnetic scale, comprises:

[0015] The control of the rolling mill cylinder to perform reciprocating motion from the initial position to the preset target position at the maximum motion speed of the saturated output of the rolling mill cylinder, the acquisition of at least two test deviation values of the rolling mill cylinder by the calibrated magnetic scale;

[0016] The acquisition of the conditional average value of at least two test deviation values as the position average deviation value;

[0017] Wherein, the absolute value of the difference between the top displacement of the rolling mill cylinder and the bottom displacement of the rolling mill cylinder in the same reciprocating motion is taken as one test deviation value of the rolling mill cylinder.

[0018] Optionally, the control mode of the rolling mill cylinder comprises pressure loop control and position loop control; the control of the rolling mill cylinder to perform the step test, the acquisition of the step average duration of the rolling mill cylinder, comprises:

[0019] When the control mode of the rolling mill cylinder is the pressure loop control, the acquisition of the actual rolling force of the rolling mill cylinder;

[0020] When the actual rolling force reaches the preset rolling force range, the control of the actual rolling force to remain unchanged;

[0021] The conversion of the control mode of the rolling mill cylinder to the position loop control, the keeping of the actual rolling force unchanged, the control of the rolling mill cylinder to perform reciprocating motion with a preset fixed stroke for a preset number of times, and the acquisition of at least two groups of step test durations;

[0022] The acquisition of the conditional average value of the at least two groups of step test durations as the step average duration;

[0023] Wherein, the reciprocating motion comprises extension motion and retraction motion, and the duration between the start time of the extension motion and the end time of the retraction motion in the same reciprocating motion is one step test duration.

[0024] Optionally, the acquisition of the state of the rolling mill cylinder according to the step average duration and the position average deviation value, comprises:

[0025] When the position average deviation value is greater than or equal to the preset deviation threshold value, it is determined that the state of the rolling mill cylinder is low synchronization;

[0026] When the position average deviation value is less than the preset deviation threshold value, it is determined that the state of the rolling mill cylinder is normal.

[0027] When the step average duration is greater than or equal to a preset step duration, it is determined that the state of the rolling mill oil cylinder is seal deterioration;

[0028] When the step average duration is less than the preset step duration, it is determined that the state of the rolling mill oil cylinder is the normal state.

[0029] Optionally, after the position average deviation value of the rolling mill oil cylinder is obtained through the calibrated magnetic scale, the method further comprises:

[0030] When the position average deviation value is greater than or equal to a preset deviation threshold, the maximum movement speed of the rolling mill oil cylinder is adjusted according to the position average deviation value;

[0031] After the maximum movement speed of the rolling mill oil cylinder is adjusted, the rolling mill oil cylinder is controlled to perform the deviation value test again until the position average deviation value is less than the preset deviation threshold.

[0032] Optionally, before the rolling mill oil cylinder is controlled to perform the deviation value test, the method further comprises:

[0033] The rolling mill oil cylinder is controlled to perform a pressing test to obtain an actual rolling force of the rolling mill oil cylinder;

[0034] When the actual rolling force is within a set rolling force range and remains for a preset pressing duration, the pressing test is ended and the rolling mill oil cylinder is controlled to perform a stiffness test to obtain a stiffness value of the rolling mill oil cylinder;

[0035] When the stiffness value is within a preset stiffness range, it is determined that the state of the rolling mill oil cylinder is good stiffness.

[0036] The rolling mill oil cylinder state detection method detects the synchronization of the two ends of the rolling mill oil cylinder through deviation value testing of the rolling mill oil cylinder after calibration of the measuring instrument, detects the seal state of the rolling mill oil cylinder through step testing of the rolling mill oil cylinder through the step duration, and detects the state of the rolling mill oil cylinder, effectively improves the rolling stability of the finishing mill group, reduces the failure probability of the rolling oil cylinder, reduces accidents, thereby reduces the time of stopping production due to rolling oil cylinder failure, and improves production efficiency.

[0037] The present application provides a rolling oil cylinder state detection device, comprising:

[0038] A magnetic scale calibration test unit is configured to control the rolling mill oil cylinder to perform magnetic scale calibration testing and calibrate the magnetic scale.

[0039] A deviation value test unit is configured to control the rolling mill oil cylinder to perform a deviation value test after the magnetic ruler calibration test is completed, and to obtain an average position deviation value of the rolling mill oil cylinder by using the calibrated magnetic ruler.

[0040] A step test unit is configured to control the rolling mill oil cylinder to perform a step test when the average position deviation value of the rolling mill oil cylinder is less than a preset deviation threshold value, and to obtain an average step duration of the rolling mill oil cylinder.

[0041] An obtaining unit is configured to obtain a state of the rolling mill oil cylinder according to the average step duration and the average position deviation value.

[0042] The rolling mill oil cylinder state detection device provided by the application can effectively improve the rolling stability of the finishing mill group, reduce the failure probability of the rolling oil cylinder, reduce accidents, thereby reducing the time for stopping production due to the failure of the rolling oil cylinder, and improving the production efficiency.

[0043] The application further provides a computer device, which comprises a memory, a processor, and a computer program stored in the memory and capable of running on the processor, and the processor implements any one of the rolling oil cylinder state detection methods when executing the computer program.

[0044] The computer device provided by the application can effectively improve the rolling stability of the finishing mill group, reduce the failure probability of the rolling oil cylinder, reduce accidents, thereby reducing the time for stopping production due to the failure of the rolling oil cylinder, and improving the production efficiency.

[0045] The application further provides a computer readable storage medium, which stores a computer program, and the computer program is executed by a processor to implement any one of the rolling oil cylinder state detection methods.

[0046] The computer readable storage medium provided by the application can effectively improve the rolling stability of the finishing mill group, reduce the failure probability of the rolling oil cylinder, reduce accidents, thereby reducing the time for stopping production due to the failure of the rolling oil cylinder, and improving the production efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0047] Figure 1 Fig. 1 is a mechanical structure schematic diagram of a hydraulic press-up system in an embodiment of the present application;

[0048] Figure 2 Fig. 2 is a flow chart of a rolling oil cylinder state detection method in an embodiment of the present application;

[0049] Figure 3 Fig. 3 is a flow chart of a rolling oil cylinder state detection method in another preferred embodiment of the present application;

[0050] Figure 4 Fig. 4 is a flow chart of a rolling oil cylinder state detection method in another preferred embodiment of the present application;

[0051] Figure 5 Fig. 5 is a flow chart of a rolling oil cylinder state detection method in another preferred embodiment of the present application;

[0052] Figure 6 Fig. 6 is a schematic diagram of a rolling oil cylinder state detection device in an embodiment of the present application;

[0053] Figure 7 Fig. 7 is a schematic diagram of a computer device in an embodiment of the present application.

[0054] Explanation of reference signs:

[0055] 1 - upper step pad; 2 - rolling oil cylinder; 3 - upper support roller pad; 4 - upper support roller; 5 - work roller; 6 - lower support roller. DETAILED DESCRIPTION

[0056] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0057] The rolling oil cylinder state detection method of the present application is applied to a hydraulic press-up system, and combines Figure 1 As shown in Fig. 1, the mechanical structure of the hydraulic press-up system includes: an upper step pad 1, a rolling oil cylinder 2, an upper support roller pad 3, an upper support roller 4, a work roller 5 and a lower support roller 6. The upper step pad 1 is arranged at the top of the rolling oil cylinder 2, the upper support roller 3 is arranged at the bottom of the rolling oil cylinder 2, the work roller 5 is arranged between the upper support roller 4 and the lower support roller 6, and the rolling oil cylinder 2 is used to change the roll gap of the support roller and directly provide a downward pressure for changing the intermediate thickness.

[0058] As shown in Fig. 2, the embodiment provides a rolling oil cylinder state detection method, which includes: Figure 2 As shown in Fig. 2, the embodiment provides a rolling oil cylinder state detection method, which includes:

[0059] S1: controlling the rolling mill oil cylinder to perform a magnetic scale calibration test, calibrating the magnetic scale;

[0060] S2: when the magnetic scale calibration test is completed, controlling the rolling mill oil cylinder to perform a deviation value test, obtaining a position average deviation value of the rolling mill oil cylinder through the calibrated magnetic scale;

[0061] S3: when the position average deviation value of the rolling mill oil cylinder is less than a preset deviation threshold, controlling the rolling mill oil cylinder to perform a step test, obtaining a step average duration of the rolling mill oil cylinder;

[0062] S4: obtaining a state of the rolling mill oil cylinder according to the step average duration and the position average deviation value.

[0063] In the embodiment of the present application, the rolling mill oil cylinder state detection method is used in a hydraulic press-up system, wherein the magnetic scale is an instrument used for position detection in the hydraulic press-up system, and in the deviation value test in the rolling mill oil cylinder state detection method, accurate measurement of the position is required to obtain accurate position values, so the magnetic scale needs to be adjusted when performing the deviation value test and the step test to ensure the accuracy of the detection. In the magnetic scale calibration test of the oil cylinder, the magnetic scale is involved in the measurement while the oil cylinder is moving, and the magnetic scale is calibrated according to the measurement results. After calibration, an accurate measuring instrument is obtained, and the state detection of the rolling mill oil cylinder is started.

[0064] When the rolling mill oil cylinder makes a large displacement, the speeds of the two ends of the rolling mill oil cylinder are inconsistent due to its own characteristics or system deviation, so the deviation value test of the rolling mill oil cylinder is required. The deviation of the two ends of the rolling mill oil cylinder is represented by the corresponding position average deviation value. When the position average deviation value is less than a preset deviation threshold, it is confirmed that the synchronization of the two ends of the rolling mill oil cylinder is good. The rolling mill oil cylinder can continue to be controlled to perform a step test. The step test is used to judge the dynamic performance of the rolling mill oil cylinder, which is one of the important elements for judging the dynamic characteristics of the rolling mill oil cylinder. The magnetic scale needs to perform accurate position detection, and the final result is the step duration. The response time of the rolling mill oil cylinder is observed through the step duration, and the response time is used to judge whether the oil cylinder will appear not timely, i.e. slow response. If the rolling mill oil cylinder responds slowly, it means that the sealing causes the oil cylinder to not work according to the preset hydraulic pressure, so as to judge the sealing state of the rolling mill oil cylinder.

[0065] In the preferred embodiment of the present application, due to the detection of the state of the rolling mill oil cylinder, the steel stacking accidents caused by the poor state of the rolling mill oil cylinder can be reduced by three times a year, and according to the one-hour downtime caused by each accident and the loss of 444775 yuan of benefits per hour, the loss of benefits caused by the accident is 1334325 yuan per year; at the same time, due to the detection of the state of the rolling mill oil cylinder, the online failure of the rolling mill oil cylinder is eliminated, and according to the 8-hour processing of each online failure and the loss of 444775 yuan of benefits per hour, the loss of benefits caused by the online failure of the rolling mill oil cylinder is 1779100 yuan per year, and the total loss of benefits is 3113425 yuan by combining the two, so the total benefits of 3113425 yuan can be improved due to the detection of the state of the rolling mill oil cylinder, that is, the production benefits are improved.

[0066] The rolling mill oil cylinder state detection method of the present application detects the synchronization of the two ends of the rolling mill oil cylinder by calibrating the measuring instrument and then testing the deviation value of the rolling mill oil cylinder, and detects the sealing state of the rolling mill oil cylinder by step testing the rolling mill oil cylinder and detecting the step duration. By detecting the state of the rolling mill oil cylinder, the rolling stability of the finishing mill group is effectively improved, the failure probability of the rolling oil cylinder is reduced, the accident is reduced, and thus the time of stopping production due to the failure of the rolling oil cylinder is reduced, and the production benefits are improved.

[0067] In the embodiment of the present application, the control of the rolling mill oil cylinder for magnetic scale calibration testing calibrates the magnetic scale, including:

[0068] The rolling mill oil cylinder is controlled to reciprocate at a preset speed from an initial position;

[0069] Wherein, the duration of each reciprocation is equal;

[0070] According to the reciprocation of the rolling mill oil cylinder, the phase waveform of the magnetic scale is adjusted to calibrate the magnetic scale.

[0071] In the present embodiment, since the magnetic scale is used to detect position information, the accuracy of the magnetic scale determines the accuracy of the detection of the state of the rolling oil cylinder, so before starting the state detection of the rolling oil cylinder, the magnetic scale needs to be calibrated. Therefore, before the detection process starts, the rolling oil cylinder is controlled to retract to the initial position, and when the rolling oil cylinder returns to the initial position, the rolling oil cylinder is controlled to reciprocate at a constant speed. When the phase waveform of the magnetic scale is obtained, an instrument such as an oscilloscope can be used to detect the displayed waveform, and then the magnetic scale is calibrated according to the displayed phase waveform.

[0072] In the preferred embodiment of the present application, since the reciprocating motion is divided into the extension motion and the retraction motion of the rolling cylinder, the extension motion and the retraction motion are performed according to the specified time, and since the movement speed of the rolling cylinder is fast, in order to distinguish that the position of the magnetic scale has reached the upper limit position and the lower limit position, a stop duration can be set between the extension motion and the retraction motion of the rolling cylinder, and during the stop duration, the position detection of the magnetic scale is stopped, and when the opposite motion is performed, the position detection is continued, and the position average deviation value of the rolling cylinder is obtained by combining the position detection of the magnetic scale and the position detection of the encoder. Figure 3 As shown in the figure, the magnetic scale calibration test flow is as follows: after the rolling cylinder is retracted to the initial position, the rolling cylinder is controlled to perform the reciprocating motion, that is, the extension motion is performed at a speed of 10 mm / s for 10 s, then stopped for 2 s, the retraction motion is performed for 10 s, and the reciprocating motion is continued until the calibration of the magnetic scale is completed, that is, the reciprocating motion of the rolling cylinder is stopped, and after the rolling cylinder is controlled to retract to the initial position, the reference position of the magnetic scale is cleared.

[0073] The rolling cylinder state detection method of the present application calibrates the magnetic scale, so that the detection accuracy of the magnetic scale is higher, and the rolling cylinder state detection is more accurate, thereby reducing accidents, reducing the production stop time due to rolling cylinder failure, and improving production efficiency.

[0074] In the embodiment of the present application, the control of the rolling cylinder to perform the deviation value test obtains the position average deviation value of the rolling cylinder through the calibrated magnetic scale, and the method comprises the following steps of:

[0075] The rolling cylinder is controlled to perform the reciprocating motion from the initial position to the preset target position at the maximum movement speed of the saturated output of the rolling cylinder, and at least two test deviation values of the rolling cylinder are obtained through the calibrated magnetic scale.

[0076] The conditional average of at least two test deviation values is obtained as the position average deviation value.

[0077] The absolute value of the difference between the top displacement of the rolling cylinder and the bottom displacement of the rolling cylinder in the same reciprocating motion is taken as one test deviation value of the rolling cylinder.

[0078] In the embodiment, when the rolling cylinder is in reciprocating motion, the speed of the two ends of the cylinder is different due to its own characteristics or system influence, which leads to the decline of the synchronization of the cylinder, so the synchronization of the cylinder needs to be detected, the rolling cylinder is controlled to extend at the maximum speed of the saturated hydraulic output, when the rolling cylinder reaches the preset target position, the rolling cylinder is controlled to retract to the initial position, the calibrated magnetic scale has good precision and can detect the displacement of the two ends of the rolling cylinder, the absolute value of the difference between the top displacement and the bottom displacement is taken as a test deviation value, since the deviation value test can obtain multiple test deviation values according to the above calculation method, a representative deviation value is selected for summation and averaging, and the average value of the selected test deviation value is taken as the position average deviation value of this test, if greater than or equal to the preset deviation threshold, the speed of the rolling cylinder is adjusted, and the deviation value test is re-performed.

[0079] In combination Figure 4 As shown in the preferred embodiment of the application, after the rolling cylinder is controlled to retract to the initial position, a preset target value of 100mm stroke is set for the rolling cylinder, and reciprocating motion is performed, when the rolling cylinder extends at the maximum motion speed and reaches 100mm, the rolling cylinder is controlled to retract 100mm, until the above-mentioned position average deviation value is less than 1mm, and the test can be stopped.

[0080] The rolling mill cylinder state detection method of the application measures the displacement of the two ends of the rolling cylinder through the magnetic scale, judges whether the synchronization of the rolling cylinder is normal according to the obtained deviation value, improves the accuracy of the rolling mill cylinder state detection, detects the state of the rolling cylinder to avoid accidents, reduces the time of stopping production due to the failure of the rolling cylinder, and improves the production efficiency.

[0081] In the embodiment, the control mode of the rolling mill cylinder includes pressure ring control and position ring control, the rolling mill cylinder is controlled to perform step test, and the step average duration of the rolling mill cylinder is obtained, including:

[0082] When the control mode of the rolling mill cylinder is the pressure ring control, the actual rolling force of the rolling mill cylinder is obtained;

[0083] When the actual rolling force reaches the preset rolling force range, the actual rolling force is controlled to remain unchanged;

[0084] The control mode of the rolling mill cylinder is converted to the position ring control, the actual rolling force is kept unchanged, the rolling mill cylinder is controlled to perform reciprocating motion with a preset fixed stroke for a preset number of times, and at least two groups of step test durations are obtained;

[0085] The conditional average value of the at least two groups of step test durations is taken as the step average duration;

[0086] The reciprocating motion comprises an extension motion and a retraction motion, and a time length between a start time of the extension motion and an end time of the retraction motion in the same reciprocating motion is a step test time length.

[0087] In the embodiment, the rolling mill cylinder control comprises pressure loop control and position loop control; wherein the pressure loop control is that after feedback adjustment of the actual pressure of the rolling mill cylinder to the set pressure, the rolling mill cylinder is controlled by using the adjusted set pressure; the position loop control is that after feedback adjustment of the actual position of the rolling mill cylinder to the set position, the rolling mill cylinder is controlled to move according to the feedback adjusted set position;

[0088] When the rolling mill cylinder is subjected to step test, the control mode of the rolling mill cylinder needs to be set to pressure loop control first, so as to facilitate setting of the unilateral pressure of the rolling mill cylinder, i.e. the actual rolling force; when the actual rolling force reaches the preset rolling force range, the actual rolling force is controlled to remain unchanged; at this time, the control mode of the rolling mill cylinder is switched to position loop control; a preset fixed stroke is set for the rolling mill cylinder; after the extension motion of the rolling mill cylinder reaches the preset fixed stroke, the rolling mill cylinder is controlled to retract the preset fixed stroke; when the reciprocating motion is completed for the preset number of times, the step test is ended; at this time, the same step test time length as the preset number of times is obtained; at this time, the sum average value of the selected step test time lengths is taken as the step average time length.

[0089] In combination with Figure 5 As shown in the figure, in the preferred embodiment of the application, when the control mode of the rolling mill cylinder is pressure loop control, the actual rolling force on both sides of the rolling mill cylinder is increased until the actual rolling force is increased to the range of 2900KN to 3100KN, and the actual rolling force is controlled to remain unchanged; after the control mode is switched to position loop control, step test is performed; the set value on both sides of the rolling mill cylinder is 100μm; the interval time length from the start time of the extension motion to the end time of the retraction motion in the same reciprocating motion is 200ms; when the reciprocating motion of the rolling mill cylinder is repeated for 3 times, the step test is ended.

[0090] The rolling mill cylinder state detection method of the application can more reflect whether the sealing of the rolling mill cylinder deteriorates, because the large-stroke rolling mill cylinder movement cannot accurately judge the state of the rolling mill cylinder, and a fixed pressure mode is used to perform small-stroke movement.

[0091] In the embodiment of the application, the state of the rolling mill cylinder is obtained according to the step average time length and the position average deviation value, and the method comprises:

[0092] When the position average deviation value is greater than or equal to the preset deviation threshold value, it is determined that the state of the rolling mill cylinder is low synchronization;

[0093] determining that the state of the rolling mill oil cylinder is a normal state when the position average deviation value is less than the preset deviation threshold value;

[0094] determining that the state of the rolling mill oil cylinder is sealing deterioration when the step average duration is greater than or equal to a preset step duration;

[0095] determining that the state of the rolling mill oil cylinder is the normal state when the step average duration is less than the preset step duration.

[0096] In the embodiment, the synchronization of the rolling mill oil cylinder is determined by judging the relationship between the position average deviation value and the preset deviation threshold value, wherein when the position average deviation value is greater than or equal to the preset deviation threshold value, it indicates that the displacement deviation of the two sides of the rolling mill oil cylinder is too large, resulting in low synchronization, and the speed of the rolling mill oil cylinder needs to be adjusted again for deviation value testing, and when the position average deviation value is less than the preset deviation threshold value, it indicates that the displacement deviation of the two sides of the rolling mill oil cylinder is within a reasonable range, and the state of the rolling mill oil cylinder is a normal state. The sealing of the rolling mill oil cylinder is determined by judging the relationship between the step duration and the preset step duration, wherein when the step average duration is greater than or equal to the preset step duration, the response duration of the rolling mill oil cylinder is too slow, and the reason can be determined that the state of the rolling mill oil cylinder is sealing deterioration, and when the step average duration is less than the preset step duration, the state of the rolling mill oil cylinder is determined to be a normal state.

[0097] The rolling mill oil cylinder state detection method provided by the application detects the synchronization of the two ends of the rolling mill oil cylinder by deviation value testing of the rolling mill oil cylinder, and detects the sealing state of the rolling mill oil cylinder by step duration through step testing of the rolling mill oil cylinder. By detecting the state of the rolling mill oil cylinder, the rolling stability of the finishing mill group is effectively improved, the failure probability of the rolling oil cylinder is reduced, the accident is reduced, the production time due to the failure of the rolling oil cylinder is reduced, and the production efficiency is improved.

[0098] In the embodiment, after the position average deviation value of the rolling mill oil cylinder is obtained by the calibrated magnetic ruler, the method further comprises:

[0099] adjusting the maximum movement speed of the rolling mill oil cylinder according to the position average deviation value when the position average deviation value is greater than or equal to the preset deviation threshold value;

[0100] after the maximum movement speed of the rolling mill oil cylinder is adjusted, the rolling mill oil cylinder is controlled to perform the deviation value test again until the position average deviation value is less than the preset deviation threshold value.

[0101] In the embodiment, when the position average deviation value is greater than or equal to the preset deviation threshold value, the synchronization of the rolling mill oil cylinder is low, at this time, according to the position average deviation value, the maximum movement speed of the rolling mill oil cylinder is adjusted by the hydraulic pressing system, after the adjustment is completed, the deviation value test of the rolling mill oil cylinder is continued, the above-mentioned cycle is maintained, until the position average deviation value is less than the preset deviation threshold value, the synchronization of the rolling mill oil cylinder is restored to normal.

[0102] The rolling mill oil cylinder state detection method provided by the application detects the synchronization of the two ends of the rolling mill oil cylinder through the deviation value test of the rolling mill oil cylinder, when the synchronization of the rolling mill oil cylinder is too low, the maximum movement speed of the rolling mill oil cylinder is actively adjusted, so that the state of the rolling mill oil cylinder is restored to normal, thereby reducing accidents, reducing the production stop time due to rolling mill oil cylinder failure, and improving production efficiency.

[0103] In the embodiment, before the control of the deviation value test of the rolling mill oil cylinder, the method further comprises:

[0104] The control of the pressing test of the rolling mill oil cylinder is performed, and the actual rolling force of the rolling mill oil cylinder is obtained.

[0105] When the actual rolling force is within the set rolling force range and the preset pressing duration is maintained, the pressing test is ended and the stiffness test of the rolling mill oil cylinder is controlled, and the stiffness value of the rolling mill oil cylinder is obtained.

[0106] When the stiffness value is within the preset stiffness range, it is determined that the state of the rolling mill oil cylinder is good stiffness.

[0107] In the embodiment, before the deviation value test, the pressing test and the stiffness test of the rolling mill oil cylinder are performed, wherein the pressing test sets the actual rolling force of the rolling mill oil cylinder within a specified range and lasts for a preset pressing duration, and then determines whether the pressing test is successful, so as to set a position reference point for the zero position of the roll gap of the rolling mill, and then perform the stiffness test, detect the stiffness of the rolling mill by the magnetic ruler, and determine whether the stiffness state of the rolling mill oil cylinder is good according to the stiffness value, so as to qualitatively test the state of the rolling mill oil cylinder.

[0108] The rolling mill oil cylinder state detection method provided by the application detects the synchronization of the two ends of the rolling mill oil cylinder through the deviation value test of the rolling mill oil cylinder, when the synchronization of the rolling mill oil cylinder is too low, the maximum movement speed of the rolling mill oil cylinder is actively adjusted, so that the state of the rolling mill oil cylinder is restored to normal, thereby reducing accidents, reducing the production stop time due to rolling mill oil cylinder failure, and improving production efficiency.

[0109] In combination with Figure 6 The application also provides a rolling mill oil cylinder state detection device 100, which comprises:

[0110] The magnetic scale calibration test unit 110 is configured to control the rolling mill oil cylinder to perform a magnetic scale calibration test, and calibrate the magnetic scale.

[0111] The deviation value test unit 120 is configured to control the rolling mill oil cylinder to perform a deviation value test after the magnetic scale calibration test is completed, and obtain an average position deviation value of the rolling mill oil cylinder by using the calibrated magnetic scale.

[0112] The step test unit 130 is configured to control the rolling mill oil cylinder to perform a step test when the average position deviation value of the rolling mill oil cylinder is less than a preset deviation threshold, and obtain an average step duration of the rolling mill oil cylinder.

[0113] The obtaining unit 140 is configured to obtain a state of the rolling mill oil cylinder according to the average step duration and the average position deviation value.

[0114] In an embodiment of the present application, the rolling mill oil cylinder state detection device 100 further comprises a pressing test unit 150 and a stiffness test unit 160.

[0115] The magnetic scale calibration test unit 110 is further configured to control the rolling mill oil cylinder to perform a reciprocating motion at a preset speed from an initial position, wherein the duration of each reciprocating motion is equal, and adjust a phase waveform of the magnetic scale according to the reciprocating motion of the rolling mill oil cylinder to calibrate the magnetic scale.

[0116] The deviation value test unit 120 is further configured to control the rolling mill oil cylinder to perform a reciprocating motion from an initial position to a preset target position at a maximum motion speed of a saturated output of the rolling mill oil cylinder, and obtain at least two test deviation values of the rolling mill oil cylinder by using the calibrated magnetic scale; obtain a conditional average of the at least two test deviation values as the average position deviation value; wherein the absolute value of the difference between the top displacement of the rolling mill oil cylinder and the bottom displacement of the rolling mill oil cylinder in the same reciprocating motion is taken as one test deviation value of the rolling mill oil cylinder.

[0117] The step test unit 130 is further configured to obtain an actual rolling force of the rolling mill oil cylinder when the control mode of the rolling mill oil cylinder is the pressure loop control.

[0118] When the actual rolling force reaches a preset rolling force range, the actual rolling force is controlled to remain unchanged.

[0119] The control mode of the rolling mill oil cylinder is switched to the position loop control, the actual rolling force is kept unchanged, the rolling mill oil cylinder is controlled to perform a reciprocating motion with a preset fixed stroke for a preset number of times, and at least two groups of step test durations are obtained.

[0120] A conditional average of the at least two groups of step test durations is obtained as the average step duration.

[0121] The reciprocating motion comprises an extension motion and a retraction motion, and a time length between a start time of the extension motion and an end time of the retraction motion in the same reciprocating motion is a step test time length;

[0122] The acquisition unit 140 is further configured to determine that the state of the rolling mill oil cylinder is low synchronization when the position average deviation value is greater than or equal to the preset deviation threshold value.

[0123] The state of the rolling mill oil cylinder is determined to be a normal state when the position average deviation value is less than the preset deviation threshold value.

[0124] The state of the rolling mill oil cylinder is determined to be seal deterioration when the step average time length is greater than or equal to a preset step time length.

[0125] The state of the rolling mill oil cylinder is determined to be the normal state when the step average time length is less than the preset step time length.

[0126] The deviation value test unit 120 is further configured to adjust a maximum motion speed of the rolling mill oil cylinder according to the position average deviation value when the position average deviation value is greater than or equal to the preset deviation threshold value, and control the rolling mill oil cylinder to perform the deviation value test again after the maximum motion speed of the rolling mill oil cylinder is adjusted until the position average deviation value is less than the preset deviation threshold value.

[0127] The pressing test unit 150 is configured to control the rolling mill oil cylinder to perform a pressing test and acquire an actual rolling force of the rolling mill oil cylinder.

[0128] The stiffness test unit 160 is configured to end the pressing test and control the rolling mill oil cylinder to perform a stiffness test when the actual rolling force is within a set rolling force range and remains for a preset pressing time length, acquire a stiffness value of the rolling mill oil cylinder, and determine that the state of the rolling mill oil cylinder is good stiffness when the stiffness value is within a preset stiffness range.

[0129] In combination with Figure 7 The application further provides a computer device, which comprises a memory, a processor, and a computer program stored in the memory and executable on the processor, and the processor implements the following steps when executing the computer program:

[0130] The rolling mill oil cylinder is controlled to perform a magnetic scale calibration test to calibrate the magnetic scale.

[0131] The rolling mill oil cylinder is controlled to perform a deviation value test after the magnetic scale calibration test is completed, and a position average deviation value of the rolling mill oil cylinder is acquired by the calibrated magnetic scale.

[0132] When the position average deviation value of the rolling mill oil cylinder is less than a preset deviation threshold value, the rolling mill oil cylinder is controlled to perform a step test, and a step average duration of the rolling mill oil cylinder is acquired;

[0133] According to the step average duration and the position average deviation value, a state of the rolling mill oil cylinder is acquired.

[0134] The computer device of the present application detects the synchronization of the two ends of the rolling mill oil cylinder by calibrating the measuring instrument and then testing the deviation value of the rolling mill oil cylinder, and detects the sealing state of the rolling mill oil cylinder by performing a step test on the rolling mill oil cylinder and through the step duration. By detecting the state of the rolling mill oil cylinder, the rolling stability of the finishing mill group is effectively improved, the failure probability of the rolling oil cylinder is reduced, the accident is reduced, and thus the time for stopping production due to the failure of the rolling oil cylinder is reduced, and the production efficiency is improved.

[0135] The present application also provides a computer readable storage medium, wherein a computer program is stored, and the computer program is executed by a processor to realize the following steps: controlling a rolling mill oil cylinder to perform a magnetic scale calibration test, and calibrating the magnetic scale;

[0136] When the magnetic scale calibration test is completed, the rolling mill oil cylinder is controlled to perform a deviation value test, and a position average deviation value of the rolling mill oil cylinder is acquired through the calibrated magnetic scale;

[0137] When the position average deviation value of the rolling mill oil cylinder is less than a preset deviation threshold value, the rolling mill oil cylinder is controlled to perform a step test, and a step average duration of the rolling mill oil cylinder is acquired;

[0138] According to the step average duration and the position average deviation value, a state of the rolling mill oil cylinder is acquired.

[0139] The computer readable storage medium of the present application detects the synchronization of the two ends of the rolling mill oil cylinder by calibrating the measuring instrument and then testing the deviation value of the rolling mill oil cylinder, and detects the sealing state of the rolling mill oil cylinder by performing a step test on the rolling mill oil cylinder and through the step duration. By detecting the state of the rolling mill oil cylinder, the rolling stability of the finishing mill group is effectively improved, the failure probability of the rolling oil cylinder is reduced, the accident is reduced, and thus the time for stopping production due to the failure of the rolling oil cylinder is reduced, and the production efficiency is improved.

[0140] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program. The program can be stored in a non-volatile computer readable storage medium, and when the program is executed, the processes of the above-mentioned embodiments of the methods can be included. Any reference to memory, storage, databases, or other media in this application includes non-volatile and / or volatile memory. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), or flash memory. Volatile memory can include random access memory (RAM) or external cache memory. As an illustration but not limitation, RAM is available in many forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), etc.

[0141] It should be noted that the relational terms herein such as "first" and "second" and the like are used solely to distinguish one from another entity or action, without necessarily requiring or implying any such actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element preceded by "comprises a" does not, without more constraints, foreclose the existence of additional identical elements in the process, method, article, or apparatus that comprises the element.

[0142] The above description is merely one specific implementation of the application. Many modifications and variations of the described embodiments can be apparent to those skilled in the art without departing from the spirit or scope of the application. Thus, it is intended that the present application cover the modifications and variations of this application provided they come within the scope of the appended claims and their equivalents.

Claims

1. A method of detecting a state of a rolling mill cylinder, characterized by, The method comprises the following steps: controlling the rolling mill oil cylinder to perform a magnetic scale calibration test to calibrate the magnetic scale; after the magnetic scale calibration test is completed, controlling the rolling mill oil cylinder to perform a deviation value test, and obtaining an average position deviation value of the rolling mill oil cylinder by using the calibrated magnetic scale; wherein the control mode of the rolling mill oil cylinder comprises pressure loop control and position loop control; the control of the rolling mill oil cylinder to perform a step test to obtain an average step time of the rolling mill oil cylinder comprises: when the control mode of the rolling mill oil cylinder is the pressure loop control, obtaining an actual rolling force of the rolling mill oil cylinder; when the actual rolling force reaches a preset rolling force range, controlling the actual rolling force to remain unchanged; changing the control mode of the rolling mill oil cylinder to the position loop control while keeping the actual rolling force unchanged, controlling the rolling mill oil cylinder to perform a preset number of reciprocating movements with a preset fixed stroke, and obtaining at least two groups of step test times; obtaining a conditional average value of the at least two groups of step test times as the average step time; wherein the reciprocating movement comprises an extension movement and a retraction movement, and the time length between the start time of the extension movement and the end time of the retraction movement in the same reciprocating movement is a step test time; when the average position deviation value of the rolling mill oil cylinder is less than a preset deviation threshold, controlling the rolling mill oil cylinder to perform a step test to obtain an average step time of the rolling mill oil cylinder; according to the average step time and the average position deviation value, obtaining the state of the rolling mill oil cylinder; wherein the obtaining of the state of the rolling mill oil cylinder according to the average step time and the average position deviation value comprises: when the average position deviation value is greater than or equal to the preset deviation threshold, determining that the state of the rolling mill oil cylinder is low synchronization; when the average position deviation value is less than the preset deviation threshold, determining that the state of the rolling mill oil cylinder is a normal state; when the average step time is greater than or equal to a preset step time, determining that the state of the rolling mill oil cylinder is seal deterioration; and when the average step time is less than the preset step time, determining that the state of the rolling mill oil cylinder is the normal state.

2. The rolling mill cylinder condition detection method according to claim 1, characterized in that, The control of the rolling mill oil cylinder to perform a magnetic scale calibration test to calibrate the magnetic scale comprises: controlling the rolling mill oil cylinder to perform reciprocating movements at a preset speed from an initial position; wherein the duration of each reciprocating movement is equal; adjusting the phase waveform of the magnetic scale according to the reciprocating movement of the rolling mill oil cylinder to calibrate the magnetic scale.

3. The rolling mill cylinder condition detection method according to claim 1, characterized in that, The control of the rolling mill oil cylinder to perform a deviation value test to obtain an average position deviation value of the rolling mill oil cylinder by using the calibrated magnetic scale comprises: controlling the rolling mill oil cylinder to perform reciprocating movements from an initial position to a preset target position at a maximum movement speed of saturated output of the rolling mill oil cylinder, and obtaining at least two test deviation values of the rolling mill oil cylinder by using the calibrated magnetic scale; obtaining a conditional average value of the at least two test deviation values as the average position deviation value. The absolute value of the difference between the top displacement of the rolling mill cylinder and the bottom displacement of the rolling mill cylinder in the same reciprocating motion is taken as a test deviation value of the rolling mill cylinder.

4. The rolling mill cylinder condition detection method according to claim 1, characterized in that, After the position average deviation value of the rolling mill cylinder is obtained through the calibrated magnetic ruler, the method further comprises: When the position average deviation value is greater than or equal to the preset deviation threshold value, the maximum movement speed of the rolling mill cylinder is adjusted according to the position average deviation value; After the maximum movement speed of the rolling mill cylinder is adjusted, the rolling mill cylinder is controlled to perform the deviation value test again until the position average deviation value is less than the preset deviation threshold value.

5. The rolling mill cylinder condition detection method according to claim 1, characterized in that, Before the rolling mill cylinder is controlled to perform the deviation value test, the method further comprises: The rolling mill cylinder is controlled to perform a pressing test to obtain an actual rolling force of the rolling mill cylinder; When the actual rolling force is within a set rolling force range and remains unchanged for a preset pressing duration, the pressing test is ended and the rolling mill cylinder is controlled to perform a stiffness test to obtain a stiffness value of the rolling mill cylinder; When the stiffness value is within a preset stiffness range, it is determined that the state of the rolling mill cylinder is good stiffness.

6. A rolling mill cylinder state detecting device characterized by comprising: The method comprises: A magnetic ruler calibration test unit is configured to control the rolling mill cylinder to perform a magnetic ruler calibration test to calibrate the magnetic ruler; A deviation value test unit is configured to control the rolling mill cylinder to perform a deviation value test to obtain a position average deviation value of the rolling mill cylinder through the calibrated magnetic ruler after the magnetic ruler calibration test is completed; wherein the control mode of the rolling mill cylinder comprises pressure loop control and position loop control; the control of the rolling mill cylinder to perform the step test to obtain the step average duration comprises: when the control mode of the rolling mill cylinder is the pressure loop control, an actual rolling force of the rolling mill cylinder is obtained; when the actual rolling force reaches a preset rolling force range, the actual rolling force is controlled to remain unchanged; the control mode of the rolling mill cylinder is switched to the position loop control while the actual rolling force remains unchanged, the rolling mill cylinder is controlled to perform a preset number of reciprocating motions with a preset fixed stroke, and at least two groups of step test durations are obtained; a conditional average value of the at least two groups of step test durations is taken as the step average duration; wherein the reciprocating motion comprises an extension motion and a retraction motion, and the duration between the start time of the extension motion and the end time of the retraction motion in the same reciprocating motion is a step test duration; A step test unit is configured to control the rolling mill cylinder to perform a step test to obtain a step average duration of the rolling mill cylinder when the position average deviation value of the rolling mill cylinder is less than a preset deviation threshold value; A step test unit is configured to control the rolling mill cylinder to perform a step test to obtain a step average duration of the rolling mill cylinder when the position average deviation value of the rolling mill cylinder is less than a preset deviation threshold value; The acquisition unit is configured to acquire the state of the rolling mill oil cylinder according to the step average time length and the position average deviation value; wherein, the acquisition of the state of the rolling mill oil cylinder according to the step average time length and the position average deviation value comprises: when the position average deviation value is greater than or equal to the preset deviation threshold, determining that the state of the rolling mill oil cylinder is low synchronization; when the position average deviation value is less than the preset deviation threshold, determining that the state of the rolling mill oil cylinder is a normal state; when the step average time length is greater than or equal to a preset step time length, determining that the state of the rolling mill oil cylinder is seal deterioration; and when the step average time length is less than the preset step time length, determining that the state of the rolling mill oil cylinder is the normal state.

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