An on-line detection system and method for thickness deviation of cold-rolled oriented silicon steel plate

Abstract

The application discloses an online detection system and method for thickness deviation of cold-rolled oriented silicon steel plate. The detection system comprises a longitudinal thickness gauge, a transverse thickness gauge, a coiler, a display screen, a PLC controller, a cold-rolling machine arranged in series, a control panel and a steel plate to be detected. The longitudinal thickness gauge comprises a C-shaped support I, a fixing screw rod, an X-ray emitting probe I, an X-ray receiving probe I and a connecting block. The transverse thickness gauge comprises an X-ray emitting probe II, an X-ray receiving probe II, a transverse moving device, a reciprocating driving device and a C-shaped support II. The longitudinal thickness gauge and the transverse thickness gauge are arranged simultaneously, so that the longitudinal thickness, the transverse thickness, the longitudinal thickness deviation, the transverse thickness deviation and the nominal thickness deviation can be detected online, and the abnormal cold-rolled oriented silicon steel plate can be monitored online.

Description

Technical Field

[0001] This invention relates to the field of grain-oriented silicon steel testing technology, and in particular to an online detection system and method for thickness deviation of cold-rolled grain-oriented silicon steel sheets. Background Technology

[0002] Longitudinal thickness deviation refers to the deviation between the actual thicknesses of various points along the longitudinal direction of the steel plate, parallel to the rolling direction (i.e., the longitudinal direction of the steel plate). Transverse thickness deviation refers to the deviation between the actual thicknesses of various points along the transverse direction of the steel plate, perpendicular to the rolling direction (the transverse direction of the steel plate). Nominal thickness deviation refers to the deviation between the actual thickness of various points on the steel plate and the target thickness. Current detection methods are based on longitudinal thickness measured by X-ray thickness gauges or transverse thickness measured manually, calculating longitudinal thickness deviation, transverse thickness deviation, and nominal thickness deviation offline. On the one hand, offline calculation of longitudinal thickness deviation, transverse thickness deviation, and nominal thickness deviation cannot detect abnormal cold-rolled grain-oriented silicon steel sheets in real time, severely impacting production efficiency and product quality. On the other hand, manual measurement data suffers from small data volume and accuracy issues due to human operation, leading to significant fluctuations in measurement results, which severely affects the analysis of transverse thickness deviation and nominal thickness deviation of cold-rolled grain-oriented silicon steel sheets.

[0003] CN111604372A discloses a method for measuring the thickness of cold-rolled non-oriented silicon steel, which involves setting up two thickness gauges sequentially along the rolling direction of the strip, transmitting the thickness data to a PLC control unit, and calculating the thickness deviation between the two thickness gauges online. However, this online measurement is limited to longitudinal thickness deviation and cannot measure transverse thickness deviation online.

[0004] Therefore, there is a lack of a method for simultaneous real-time online detection of longitudinal thickness deviation, transverse thickness deviation, and nominal thickness deviation of cold-rolled grain-oriented silicon steel sheets. Summary of the Invention

[0005] To address the aforementioned shortcomings, this invention provides an online detection system and method for thickness deviation of cold-rolled grain-oriented silicon steel sheets. The detection system and method of this invention can simultaneously detect longitudinal and transverse thicknesses online, and calculate longitudinal thickness deviation, transverse thickness deviation, and nominal thickness deviation, thereby enabling online monitoring of abnormal cold-rolled grain-oriented silicon steel sheets.

[0006] One objective of this invention is to provide an online detection system for thickness deviation of cold-rolled grain-oriented silicon steel sheets. The thickness deviation includes longitudinal thickness deviation, transverse thickness deviation, and nominal thickness deviation. The online detection system includes a longitudinal thickness gauge 4, a transverse thickness gauge 5, a coiler 6, a display screen 7, a PLC controller 8, a cold rolling mill 3 connected in series, a control panel 9, and a steel sheet 10 to be tested. The longitudinal thickness gauge 4 and the transverse thickness gauge 5 are sequentially distributed after the cold rolling mill 3. The display screen 7 is electrically connected to the PLC controller 8 and the control panel 9 in sequence to process and display the detection data. The steel sheet 10 to be tested passes through the transverse thickness gauge 5 and is then coiled by the coiler 6.

[0007] Furthermore, the detection system also includes a strip correction device 1 and a mill inlet tension roll 2; the steel plate 10 to be tested enters the cold rolling mill 3, which is connected in series, under the action of the strip correction device 1 and the mill inlet tension roll 2.

[0008] Furthermore, the longitudinal thickness gauge 4 includes a C-shaped bracket I11, a fixing screw 12, an X-ray emitting probe I13, an X-ray receiving probe I14, and a connecting block 15; the C-shaped bracket I11 is fixed by the fixing screw 12; the X-ray emitting probe I13 and the X-ray receiving probe I14 are respectively fixed to the C-shaped port of the C-shaped bracket I11 by the connecting block 15, and the X-ray emitting probe I13 and the X-ray receiving probe I14 are arranged opposite to each other, for detecting the thickness of the center of the width of the steel plate 10 to be measured, that is, the real-time longitudinal thickness.

[0009] Furthermore, the transverse thickness gauge 5 includes an X-ray detection probe, a transverse moving device, a reciprocating drive device, and a C-shaped bracket II20; the X-ray detection probe is fixedly connected to the transverse moving device and moves along the width direction of the steel plate with the transverse moving device; the C-shaped bracket II20 is set on the reciprocating drive device and moves synchronously with the steel plate 10 to be measured under the drive of the reciprocating drive device, thereby measuring the thickness of different points at the same transverse position during the longitudinal movement, returning after completing one transverse thickness measurement, and repeating the above synchronous movement and return process.

[0010] Furthermore, the main body of the C-shaped bracket II20 is provided with a slot 32, and when measuring the transverse thickness, the silicon steel plate passes through the middle of the slot 32.

[0011] Furthermore, the X-ray detection probe includes an X-ray emitting probe II23 and an X-ray receiving probe II24.

[0012] Further, the lateral movement device includes a lateral movement block 18, a lateral movement groove 19, a variable frequency motor II 25, a guide wheel II 26, and a guide wheel rotation track 27; the lateral movement groove 19 is fixed to the end of the C-shaped bracket II 20; the lateral movement block 18 is disposed in the lateral movement groove 19; the lateral movement groove 19 is fixed to the end of the C-shaped bracket II 20; the variable frequency motor II 25 is automatically controlled to rotate forward and backward through a limit switch, and is coaxially connected to the guide wheel II 26, the guide wheel II 26 rotates in the guide wheel rotation track 27, and controls the lateral movement block 18 to reciprocate within the lateral movement groove 19; the X-ray online detection probe is fixedly connected to the lateral movement block 18; the lateral movement block 18 is fixedly connected to the guide wheel II 26.

[0013] Furthermore, the reciprocating drive device is a motor-driven reciprocating motion device used to realize the synchronous movement of the C-shaped bracket II fixed thereon with the steel strip. At the same time, after a single transverse thickness measurement is completed, it can return to continue driving the C-shaped bracket II to reciprocate. The reciprocating motion device includes, but is not limited to, a reciprocating motion structure driven by a motor. This invention does not limit the specific structure of the reciprocating motion device. Any reciprocating motion structure that can realize synchronous movement with the steel plate is within the protection scope of this invention.

[0014] One objective of this invention is to provide an online detection method for thickness deviation of cold-rolled grain-oriented silicon steel sheets. The detection method of this invention is achieved by designing a mobile device that can simultaneously measure the transverse and longitudinal thickness of the silicon steel, and by using a PLC controller and a display to realize real-time detection and monitoring of the longitudinal and transverse thickness of the grain-oriented silicon steel.

[0015] Furthermore, the method for online detection of longitudinal thickness deviation, transverse thickness deviation, and nominal thickness deviation of cold-rolled grain-oriented silicon steel sheets using the aforementioned online detection system specifically includes the following steps:

[0016] (1) When the steel plate 10 to be tested enters the testing system, it is first corrected by the steel strip correction device 1, then tensioned by the mill inlet tensioning roller 2, and then corrected by the steel strip again. After that, the steel plate 10 to be tested enters the cold rolling mill 3 set in series for cold rolling.

[0017] (2) The cold-rolled steel plate 10 to be tested is passed through a longitudinal thickness gauge and a transverse thickness gauge in sequence to perform online detection of longitudinal thickness and transverse thickness.

[0018] (3) The PLC controller 8 calculates in real time and displays the longitudinal thickness deviation, transverse thickness deviation and nominal thickness deviation of the cold-rolled oriented silicon steel sheet on the display screen 7. When the real-time thickness deviation is less than the set allowable thickness deviation, the cold rolling process proceeds normally; otherwise, the system alarm platform is activated and the production of the abnormal cold-rolled oriented silicon steel sheet is terminated.

[0019] Further, in step 2, the specific working process of the longitudinal thickness gauge is as follows: when the steel plate 10 to be measured passes through the longitudinal thickness gauge 4, the X-ray emission probe I13 and the receiving probe I14 are activated, and the longitudinal thickness of the steel plate 10 to be measured is transmitted to the PLC controller 8 and displayed in real time on the display screen 7; the logic analysis in the PLC controller 8 calculates and extracts the real-time longitudinal thickness deviation online, and compares the real-time longitudinal thickness deviation with the longitudinal thickness allowable deviation set by the system; when the real-time longitudinal thickness deviation is less than the longitudinal thickness allowable deviation set by the system, the cold rolling process proceeds normally; otherwise, the system alarm platform is activated, and the production of abnormal cold-rolled oriented silicon steel plates is terminated.

[0020] Further, in step 2, the specific working process of the transverse thickness gauge is as follows: After the steel plate to be measured passes through the longitudinal thickness gauge 4, it enters the transverse thickness gauge 5. It can pass normally through the slot 32 of the C-shaped bracket II20. The X-ray detection probe, transverse movement device, and reciprocating drive device are turned on. The X-ray detection probe follows the transverse movement device to measure the transverse thickness of the steel plate. At the same time, the reciprocating drive device drives the C-shaped bracket II20 to move at the same speed as the steel plate. After the X-ray detection probe completes one transverse thickness measurement, the reciprocating drive device drives the C-shaped bracket II20 back. Then, the above process of moving and returning at the same speed is repeated, thereby realizing the transverse thickness measurement at the same position. The transverse thickness of the cold-rolled grain-oriented silicon steel plate measured by the X-ray detection probe is transmitted to the PLC controller 8 and displayed in real time on the display screen 7. The logic analysis in the PLC controller 8 calculates and extracts the real-time transverse thickness deviation online, and compares the real-time transverse thickness deviation with the transverse thickness allowable deviation set by the system. When the real-time transverse thickness deviation is less than the transverse thickness allowable deviation, the cold rolling process proceeds normally; otherwise, the system alarm platform is activated and the production of abnormal cold-rolled grain-oriented silicon steel plates is terminated.

[0021] Furthermore, in step 2, the logic analysis in the PLC controller 8 calculates and extracts the real-time nominal thickness deviation online, and automatically compares the real-time nominal thickness deviation with the nominal thickness allowable deviation set by the system; when the real-time nominal thickness deviation is less than the nominal thickness allowable deviation, the cold rolling process proceeds normally; otherwise, the system alarm platform is activated and the production of abnormal cold-rolled oriented silicon steel sheets is terminated.

[0022] The beneficial technical effects of this invention are as follows:

[0023] This invention, following a cold rolling mill arranged in series, sequentially installs a fixed-position X-ray thickness gauge (longitudinal thickness gauge) and an improved laterally movable X-ray thickness gauge (transverse thickness gauge). The X-ray emitting probe and receiving probe of the longitudinal thickness gauge are fixed below and above the transverse center position of the cold-rolled grain-oriented silicon steel sheet, respectively. The X-ray emitting probe and receiving probe of the transverse thickness gauge are mounted on a transverse moving device. The transverse moving device is connected to a reciprocating drive device via a C-shaped bracket to achieve synchronous and same-speed movement with the cold-rolled grain-oriented silicon steel sheet. This enables online simultaneous detection of both longitudinal and transverse thickness of the cold-rolled grain-oriented silicon steel sheet, improving the accuracy of thickness monitoring. Any thickness discrepancies in either direction can be detected in real time for more timely adjustments.

[0024] Simultaneously, the PLC controller is used to subtract the longitudinal and transverse thicknesses from the target nominal thickness online, enabling online detection of the nominal thickness deviation of the cold-rolled grain-oriented silicon steel sheet. Furthermore, the PLC controller calculates the longitudinal thickness deviation (difference between longitudinal and transverse thicknesses) and the transverse thickness deviation (difference between transverse thicknesses) online in real time, facilitating specific adjustments to the steel sheet thickness.

[0025] This invention improves and optimizes the thickness measurement system for cold-rolled grain-oriented silicon steel sheets. On the one hand, it ensures the measurement accuracy of longitudinal thickness deviation, transverse thickness deviation, and nominal thickness deviation of the steel sheet. On the other hand, it improves the measurement efficiency of longitudinal thickness deviation, transverse thickness deviation, and nominal thickness deviation of the steel sheet. This will significantly improve the pass rate and production efficiency of cold-rolled grain-oriented silicon steel sheets. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0027] Figure 2 This is a schematic diagram of the longitudinal thickness gauge of the present invention.

[0028] Figure 3 This is a schematic diagram of the transverse thickness gauge of the present invention.

[0029] Figure 4 This is a schematic diagram of the C-type bracket II for the transverse thickness gauge of the present invention.

[0030] Figure 5 This is a schematic diagram (bottom view) of the guide wheel assembly of the present invention.

[0031] Figure 1-5In the middle section: 1. Steel strip correction device; 2. Mill inlet tension roll; 3. Cold rolling mill arranged in series; 4. Longitudinal thickness gauge; 5. Transverse thickness gauge; 6. Coiler; 7. Display screen; 8. PLC controller; 9. Control panel; 10. Steel plate to be measured; 11. C-shaped bracket I; 12. Fixing screw; 13. X-ray emitting probe I; 14. X-ray receiving probe I; 15. Connecting block; 16. Drive gear I; 17. Transmission chain; 18. Transverse moving block; 19. Transverse moving groove; 20. C-shaped bracket II; 21. Guide wheel assembly; 22. Motor I; 23. X-ray emitting probe II; 24. X-ray receiving probe II; 25. Variable frequency motor II; 26. Guide wheel II; 27. Guide wheel rotation track; 28. Drive gear II; 29. ​​Connecting shaft sleeve I; 30. Connecting shaft; 31. Connecting shaft sleeve II; 32. Slotted opening; 2101. Driving guide wheel; 2102. Driven guide wheel I; 2103. Driven guide wheel II; 2104. Driven guide wheel III. Detailed Implementation

[0032] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0033] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0034] It should be noted that, in the description of this invention, unless otherwise specified, the terms "connection" and "setup" should be interpreted broadly, for example, referring to a fixed connection, a detachable connection, or other connection methods. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0035] In this invention, the longitudinal thickness deviation or transverse thickness deviation refers to the difference in real-time thickness at different points in the longitudinal or transverse direction; the nominal thickness deviation is the difference between the real-time thickness and the set target thickness.

[0036] Figure 1-5 This is a schematic diagram of the detection system and its components according to the present invention.

[0037] Example 1

[0038] An online detection system for thickness deviation of cold-rolled grain-oriented silicon steel sheet, wherein the thickness deviation includes longitudinal thickness deviation, transverse thickness deviation, and nominal thickness deviation, and the online detection system, such as... Figure 1As shown, the system includes a strip straightening device 1, a mill inlet tension roll 2, a longitudinal thickness gauge 4, a transverse thickness gauge 5, a coiler 6, a display screen 7, a PLC controller 8, a cold rolling mill 3 connected in series, a control panel 9, and a steel plate 10 to be tested. The longitudinal thickness gauge 4 and the transverse thickness gauge 5 are sequentially distributed after the cold rolling mill 3 connected in series. The display screen 7 is electrically connected to the PLC controller 8 and the control panel 9 in series to realize the processing and display of detection data. The steel plate 10 to be tested passes through the transverse thickness gauge 5 and is then coiled by the coiler 6. The steel plate 10 to be tested enters the cold rolling mill 3 connected in series under the action of the strip straightening device 1 and the mill inlet tension roll 2.

[0039] The coiler 6, together with the tensioning wheel and the steel strip correction device, ensures the stability of the steel plate during movement and improves the detection accuracy.

[0040] The longitudinal thickness gauge 4 (such as...) Figure 2 As shown, it includes a C-shaped bracket I11, a fixing screw 12, an X-ray emitting probe I13, an X-ray receiving probe I14, and a connecting block 15; the C-shaped bracket I11 is fixed by the fixing screw 12; the X-ray emitting probe I13 and the X-ray receiving probe I14 are respectively fixed to the C-shaped port of the C-shaped bracket I11 by the connecting block 15, and the X-ray emitting probe I13 and the X-ray receiving probe I14 are arranged opposite to each other, for detecting the thickness of the center of the width of the steel plate 10 to be tested, that is, the real-time longitudinal thickness.

[0041] The transverse thickness gauge 5 includes an X-ray detection probe, a transverse moving device, a reciprocating drive device, and a C-shaped bracket II20. The X-ray detection probe includes an X-ray emitting probe II23 and an X-ray receiving probe II24; the X-ray emitting probe II23 and the X-ray receiving probe II24 are arranged opposite to each other; the X-ray detection probes are all fixedly connected to the transverse moving device and move along the width direction of the steel plate with the transverse moving device; the main body of the C-shaped bracket II20 is provided with a slot 32, through which the silicon steel plate passes during transverse thickness measurement; the C-shaped bracket II20 is mounted on the reciprocating drive device and moves synchronously and at the same speed as the steel plate 10 under the drive of the reciprocating drive device, returning after completing one transverse thickness measurement, and then repeating the above synchronous and speed-based movement and return process to achieve transverse thickness measurement at different positions of the steel plate 10;

[0042] The lateral moving device works in conjunction with the reciprocating motion device to achieve thickness detection of the steel plate in the same width direction.

[0043] The lateral movement device is a structure that moves laterally along the steel plate by means of a motor, and the speed of movement is controlled by the motor.

[0044] The lateral movement device includes a lateral movement block 18, a lateral movement groove 19, a variable frequency motor II 25, a guide wheel II 26, and a guide wheel rotation track 27. The lateral movement groove 19 is fixed to the C-shaped end of the C-shaped bracket II 20. The lateral movement block 18 is disposed in the lateral movement groove 19. The variable frequency motor II 25 is controlled to rotate in both directions via a limit switch. The variable frequency motor II 25 is coaxially connected to the guide wheel II 26, which rotates in the guide wheel rotation track 27. The guide wheel II 26 is fixedly connected to the lateral movement block 18, and drives the lateral movement block 18 to reciprocate within the lateral movement groove 19. The X-ray online detection probe is fixedly connected to the lateral movement block 18 and reciprocates with it. In the lateral movement device, the speed of the lateral movement block 18 is adjusted by the variable frequency motor. The motor frequency setting depends on the required amount of lateral thickness data. The higher the frequency, the faster the motor rotates, the faster the lateral movement block moves, the more positions that can measure the lateral thickness, and the larger the amount of lateral thickness data.

[0045] The reciprocating drive device is a mechanism driven by a motor that enables the C-shaped bracket II20 to reciprocate. It is used to enable the C-shaped bracket II fixed on it to move synchronously with the steel belt. At the same time, after a single transverse thickness measurement is completed, it can return to continue driving the C-shaped bracket II to reciprocate.

[0046] A method for online detection of longitudinal thickness deviation, transverse thickness deviation, and nominal thickness deviation of cold-rolled grain-oriented silicon steel sheets using the above-mentioned online detection system specifically includes the following steps:

[0047] (1) When the steel plate 10 to be tested enters the testing system, it is first corrected by the steel strip correction device 1, then tensioned by the mill inlet tensioning roller 2, and then corrected by the steel strip again. After that, the steel plate 10 to be tested enters the cold rolling mill 3 set in series for cold rolling.

[0048] (2) The cold-rolled steel plate 10 to be tested is passed through a longitudinal thickness gauge and a transverse thickness gauge in sequence to perform online detection of longitudinal thickness and transverse thickness;

[0049] (3) The PLC controller 8 calculates in real time and displays the longitudinal thickness deviation, transverse thickness deviation and nominal thickness deviation of the cold-rolled oriented silicon steel sheet on the display screen 7. When the real-time thickness deviation is less than the set allowable thickness deviation, the cold rolling process proceeds normally; otherwise, the system alarm platform is activated and the production of the abnormal cold-rolled oriented silicon steel sheet is terminated.

[0050] Further, in step 2, the specific working process of the longitudinal thickness gauge is as follows: when the steel plate 10 to be measured passes through the longitudinal thickness gauge 4, the X-ray emission probe I13 and the receiving probe I14 are activated, and the longitudinal thickness of the steel plate 10 to be measured is transmitted to the PLC controller 8 and displayed in real time on the display screen 7; the logic analysis in the PLC controller 8 calculates and extracts the real-time longitudinal thickness deviation online, and compares the real-time longitudinal thickness deviation with the longitudinal thickness allowable deviation set by the system; when the real-time longitudinal thickness deviation is less than the longitudinal thickness allowable deviation set by the system, the cold rolling process proceeds normally; otherwise, the system alarm platform is activated, and the production of abnormal cold-rolled oriented silicon steel plates is terminated.

[0051] Further, in step 2, the specific working process of the transverse thickness gauge is as follows: After the steel plate to be measured passes through the longitudinal thickness gauge 4, it enters the transverse thickness gauge 5. It can pass normally through the slot 32 of the C-shaped bracket II20. The X-ray detection probe, transverse movement device, and reciprocating drive device are turned on. The X-ray detection probe follows the transverse movement device to measure the transverse thickness of the steel plate. At the same time, the reciprocating drive device drives the C-shaped bracket II20 to move synchronously with the steel plate. After the X-ray detection probe completes one transverse thickness measurement, the reciprocating drive device drives the C-shaped bracket II20 back. Then, the above synchronous movement and return process is repeated to realize the transverse thickness measurement at the same position. The transverse thickness of the cold-rolled grain-oriented silicon steel plate measured by the X-ray detection probe is transmitted to the PLC controller 8 and displayed in real time on the display screen 7. The logic analysis in the PLC controller 8 calculates and extracts the real-time transverse thickness deviation online, and compares the real-time transverse thickness deviation with the transverse thickness allowable deviation set by the system. When the real-time transverse thickness deviation is less than the transverse thickness allowable deviation, the cold rolling process proceeds normally; otherwise, the system alarm platform is activated and the production of abnormal cold-rolled grain-oriented silicon steel plates is terminated.

[0052] Furthermore, in step 2, the logic analysis in the PLC controller 8 calculates and extracts the real-time nominal thickness deviation online, and automatically compares the real-time nominal thickness deviation with the nominal thickness allowable deviation set by the system; when the real-time nominal thickness deviation is less than the nominal thickness allowable deviation, the cold rolling process proceeds normally; otherwise, the system alarm platform is activated and the production of abnormal cold-rolled oriented silicon steel sheets is terminated.

[0053] Example 2

[0054] An online detection system for thickness deviation of cold-rolled grain-oriented silicon steel sheet is disclosed. The thickness deviation includes longitudinal thickness deviation, transverse thickness deviation, and nominal thickness deviation. The online detection system includes a longitudinal thickness gauge 4, a transverse thickness gauge 5, a coiler 6, a display screen 7, a PLC controller 8, a cold rolling mill 3 connected in series, a control panel 9, a steel plate to be tested 10, a strip correction device 1, and a mill inlet tension roll 2. The longitudinal thickness gauge 4 and the transverse thickness gauge 5 are sequentially distributed after the cold rolling mill 3. The display screen 7 is electrically connected to the PLC controller 8 and the control panel 9 to process and display the detection data. The steel plate to be tested 10 passes through the transverse thickness gauge 5 and is coiled by the coiler 6. The steel plate to be tested 10 enters the cold rolling mill 3 under the action of the strip correction device 1 and the mill inlet tension roll 2.

[0055] The structure of the longitudinal thickness gauge 4 is the same as that in Embodiment 1.

[0056] The transverse thickness gauge 5, such as Figure 3-5 As shown, it includes an X-ray detection probe, a lateral moving device, a reciprocating drive device, and a C-shaped bracket II20. The X-ray detection probe includes an X-ray emitting probe II23 and an X-ray receiving probe II24. The X-ray emitting probe II23 and the X-ray receiving probe II24 are arranged opposite to each other. The end of the X-ray detection probe is fixed to the lateral moving block 18 of the lateral moving device by adhesive bonding. The X-ray detection probe moves along the width direction of the steel plate with the lateral moving device.

[0057] The lateral moving device works in conjunction with the reciprocating motion device to achieve thickness detection of the steel plate in the same width direction.

[0058] The lateral movement device is a structure that moves laterally along the steel plate by means of a motor, and the speed of movement is controlled by the motor.

[0059] The lateral movement device includes a lateral movement block 18, a lateral movement groove 19, a variable frequency motor II25, a guide wheel II26, and a guide wheel rotation track 27. The variable frequency motor II25 is controlled to rotate in both directions via a limit switch. The variable frequency motor II25 is coaxially connected to the guide wheel II26, which rotates within the guide wheel rotation track 27. The lateral movement groove 19 is located at the C-shaped end of the C-shaped bracket II20. The lateral movement block 18 is placed within the lateral movement groove 19 and is bonded to the connecting shaft sleeve I29 of the guide wheel 26. The guide wheel 26 controls the reciprocating motion of the lateral movement block 18 within the lateral movement groove 19. The X-ray online detection probe is bonded to the lateral movement block 18. When the lateral movement device is operating, the lateral movement block 18's movement speed is controlled by the variable frequency motor. The motor frequency setting depends on the required amount of lateral thickness data. A higher frequency results in a faster motor rotation speed, a faster lateral movement block movement speed, more measurable lateral thickness positions, and a larger amount of lateral thickness data.

[0060] The main body of the C-shaped bracket II20 is provided with a slot 32. When measuring the transverse thickness, the silicon steel plate passes through the middle of the slot 32. The C-shaped bracket II20 is fixed on the reciprocating drive device and moves synchronously and at the same speed with the steel plate 10 to be tested under the drive of the reciprocating drive device. After completing one transverse thickness test, it returns. Then, the above synchronous movement and return process is repeated to realize the transverse thickness test at different positions of the steel plate 10 to be tested.

[0061] The reciprocating drive device is driven by a motor and can realize the reciprocating motion mechanism of the C-shaped bracket II20. It is used to realize the synchronous movement of the C-shaped bracket II fixed on it with the steel belt. At the same time, after the single transverse thickness measurement is completed, it can return to continue to drive the C-shaped bracket II to reciprocate.

[0062] The reciprocating drive device, such as Figure 3-5As shown, it specifically includes a motor I22, a drive gear set, a transmission chain 17, and a guide wheel set; wherein, the drive gear set includes a drive gear I16 and a drive gear II28; the motor I22 is coaxially connected to the drive gear I16; the motor I22 is automatically controlled to rotate in both directions via a limit switch, and the drive gear I16 drives the guide wheel set through the transmission chain 17 and the drive gear II28. The guide wheel set includes a driving guide wheel 2101, a driven guide wheel I2102, a driven guide wheel II2103, and a driven guide wheel III2104; the driving guide wheel 2101 is coaxial with the drive gear II27 and is connected to the drive gear II28. Driven by 27, the active guide wheel 2101 and the driven guide wheel I 2102 are coaxially connected through a connecting shaft 30; the driven guide wheel II 2103 and the driven guide wheel III 2104 are also coaxially connected; a connecting shaft sleeve II 31 is provided on the connecting shaft between the active guide wheel 2101 and the driven guide wheel I 2102 and the connecting shaft between the driven guide wheel II 2103 and the driven guide wheel III 2104, and the connecting shaft sleeve II 31 is fixed to the bottom of the C-shaped bracket II 20 by adhesive bonding; the active guide wheel 2101 drives the driven guide wheel I 2102 to rotate through the coaxial connection; the active guide wheel 2101 and the driven guide wheel I 2102 drive the driven guide wheel II 2103 and the driven guide wheel III 2104 to rotate through the C-shaped bracket II 20. The C-shaped bracket II20 is fixed on the reciprocating drive device to achieve synchronous reciprocating motion with the reciprocating drive device, ensuring that the X-ray detection probe moves synchronously with the steel plate during the measurement, thereby realizing the measurement of the thickness of different points on the same transverse line of the steel plate.

[0063] A method for online detection of longitudinal thickness deviation, transverse thickness deviation and nominal thickness deviation of cold-rolled grain-oriented silicon steel sheet using the online detection system includes the following steps:

[0064] (1) When the steel plate 10 to be tested enters the testing system, it is first corrected by the steel strip correction device 1, then tensioned by the mill inlet tensioning roller 2, and then corrected by the steel strip again. After that, the steel plate 10 to be tested enters the cold rolling mill 3 set in series for cold rolling.

[0065] (2) The cold-rolled steel plate 10 to be tested is passed through a longitudinal thickness gauge and a transverse thickness gauge in sequence to perform online detection of longitudinal thickness and transverse thickness.

[0066] (3) The PLC controller 8 calculates in real time and displays the longitudinal thickness deviation, transverse thickness deviation and nominal thickness deviation of the cold-rolled oriented silicon steel sheet on the display screen 7. When the real-time thickness deviation is less than the set allowable thickness deviation, the cold rolling process proceeds normally; otherwise, the system alarm platform is activated and the production of the abnormal cold-rolled oriented silicon steel sheet is terminated.

[0067] In step 2, the specific working process of the longitudinal thickness gauge is as follows: When the steel plate 10 to be measured passes through the longitudinal thickness gauge, the X-ray emission probe I13 and the receiving probe I14 are activated, and the longitudinal thickness of the steel plate 10 to be measured is transmitted to the PLC controller 8 and displayed in real time on the display screen 7; the logic analysis in the PLC controller 8 calculates and extracts the real-time longitudinal thickness deviation online, and compares the real-time longitudinal thickness deviation with the longitudinal thickness allowable deviation set by the system; when the real-time longitudinal thickness deviation is less than the longitudinal thickness allowable deviation set by the system, the cold rolling process proceeds normally; otherwise, the system alarm platform is activated, and the production of abnormal cold-rolled oriented silicon steel plates is terminated.

[0068] In step 2, the specific working process of the transverse thickness gauge is as follows: When the steel plate 10 to be measured passes through the transverse thickness gauge, the X-ray emitting probe II 23, the receiving probe II 24, and the motor I 22 are activated; after the motor I 22 is activated, the drive gear set starts to rotate, and drives the guide wheel set installed at the bottom of the C-shaped bracket II 20 to rotate through the transmission chain 17. The guide wheel set drives the C-shaped bracket II 20 and the transverse moving device to move, thereby realizing the synchronous movement of the X-ray emitting probe II 23 and the receiving probe II 24 with the steel plate 10 to be measured in the longitudinal direction of the steel plate, transmitting the transverse thickness of the cold-rolled grain-oriented silicon steel plate to the PLC controller 8 and displaying it on the display screen 7 in real time; the logic analysis in the PLC controller 8 calculates and extracts the real-time transverse thickness deviation online, and compares the real-time transverse thickness deviation with the transverse thickness allowable deviation set by the system; when the real-time transverse thickness deviation is less than the transverse thickness allowable deviation, the cold rolling process proceeds normally; otherwise, the system alarm platform is activated and the production of abnormal cold-rolled grain-oriented silicon steel plates is terminated.

[0069] Meanwhile, the logic analysis in PLC controller 8 calculates and extracts the real-time nominal thickness deviation online, and automatically compares the real-time nominal thickness deviation with the nominal thickness allowable deviation set by the system. When the real-time nominal thickness deviation is less than the nominal thickness allowable deviation, the cold rolling process proceeds normally; otherwise, the system alarm platform is activated and the production of abnormal cold-rolled oriented silicon steel sheets is terminated.

[0070] This invention, by simultaneously designing a longitudinal thickness gauge and a transverse thickness gauge that can move synchronously with the steel strip and detect the thickness at different points along the strip's width, and in conjunction with a PLC controller, achieves real-time online detection of the longitudinal and transverse thickness of silicon steel. It also calculates the longitudinal thickness deviation, transverse thickness deviation, and nominal thickness deviation in real time based on the longitudinal and transverse thicknesses, and compares them with the allowable deviations for the longitudinal, transverse, and nominal thicknesses, respectively. If the thickness deviation is less than the allowable deviation, the system operates normally; otherwise, an alarm platform is activated, terminating the cold rolling process. After cold rolling, pressing the "End" button on the control panel stops the system. The detection system and method described in this invention achieve real-time and accurate detection and monitoring of the thickness of silicon steel.

[0071] The above description is merely a preferred embodiment of the present invention, and the present invention is not limited to the above embodiments. It can be understood that other improvements and variations directly derived or conceived by those skilled in the art without departing from the spirit and concept of the present invention should be considered to be included within the protection scope of the present invention.

Claims

1. An on-line system for detecting longitudinal thickness deviation, transverse thickness deviation and nominal thickness deviation of a cold-rolled grain-oriented silicon steel sheet, characterized by, The detection system comprises a longitudinal thickness gauge (4), a transverse thickness gauge (5), a coiler (6), a display screen (7), a PLC controller (8), the cold rolling mill (3) arranged in series, a control panel (9) and a steel plate to be detected (10); the longitudinal thickness gauge (4) and the transverse thickness gauge (5) are sequentially arranged behind the cold rolling mill (3) arranged in series; the display screen (7) is electrically connected with the PLC controller (8) and the control panel (9) in sequence to realize processing and display of detection data; the steel plate to be detected (10) passes through the transverse thickness gauge (5) and is coiled by the coiler (6). The longitudinal thickness gauge (4) comprises a C-shaped support I (11), a fixing screw rod (12), an X-ray emitting probe I (13), an X-ray receiving probe I (14) and a connecting block (15); the C-shaped support I (11) is fixed by the fixing screw rod (12); the X-ray emitting probe I (13) and the X-ray receiving probe I (14) are fixed at the C-shaped ports of the C-shaped support I (11) by the connecting block (15) respectively, and the X-ray emitting probe I (13) and the X-ray receiving probe I (14) are oppositely arranged to detect the thickness of the width center of the steel plate to be detected (10), i.e. the real-time longitudinal thickness. The transverse thickness gauge (5) comprises an X-ray detection probe, a transverse moving device, a reciprocating driving device and a C-shaped support II (20); the X-ray detection probe is fixedly connected to the transverse moving device and moves along the width direction of the steel plate with the transverse moving device; the C-shaped support II (20) is arranged on the reciprocating driving device and moves synchronously with the steel plate to be detected (10) under the driving of the reciprocating driving device, returns after completing one transverse thickness detection, and repeats the above synchronous moving and returning process. The transverse moving device comprises a transverse moving block (18), a transverse moving groove (19), a variable frequency motor II (25), a guide wheel II (26) and a guide wheel rotating track (27); the transverse moving groove (19) is fixed at the end of the C-shaped support II (20); the transverse moving block (18) is arranged in the transverse moving groove (19); the variable frequency motor II (25) is coaxially connected with the guide wheel II (26), the guide wheel II (26) rotates in the guide wheel rotating track (27) and controls the reciprocating movement of the transverse moving block (18) in the transverse moving groove (19); the X-ray detection probe is fixedly connected with the transverse moving block (18); the reciprocating driving device is a motor-driven reciprocating movement device.

2. The online detection system of claim 1, wherein, The detection system further comprises a steel strip deviation rectifying device (1) and a mill entry tensioning roller (2); the steel plate to be detected (10) enters the cold rolling mill (3) arranged in series under the action of the steel strip deviation rectifying device (1) and the mill entry tensioning roller (2).

3. The online detection system of claim 1, wherein, The X-ray detection probe comprises an X-ray emitting probe II (23) and an X-ray receiving probe II (24).

4. A method for on-line detecting the longitudinal thickness deviation, the transverse thickness deviation and the nominal thickness deviation of a cold-rolled oriented silicon steel sheet by using the on-line detecting system according to any one of claims 1-3, characterized in that, The method comprises the following steps: (1) The steel plate to be measured (10) enters the detection system, first passes through the steel strip deviation rectifying device (1) to rectify the deviation, then passes through the entry tensioning roller (2) of the rolling mill to be tensioned, and then passes through the steel strip deviation rectifying device again, and then the steel plate to be measured (10) enters the tandem cold rolling mill (3) to be cold rolled; (2) The cold-rolled steel plate to be measured (10) passes through the longitudinal thickness gauge (4) and the transverse thickness gauge (5) in sequence, and the online detection of the longitudinal thickness and the transverse thickness is carried out in sequence; (3) The PLC controller (8) calculates the longitudinal thickness deviation, the transverse thickness deviation and the nominal thickness deviation of the cold-rolled oriented silicon steel plate in real time and displays them on the display screen (7). When the real-time thickness deviation is less than the set thickness allowable deviation, the cold rolling process is normal; otherwise, the system alarm platform is started to terminate the production of the abnormal cold-rolled oriented silicon steel plate.

5. The method of claim 4, wherein, In step (2), the specific working process of the longitudinal thickness gauge is as follows: when the steel plate to be measured (10) passes through the longitudinal thickness gauge (4), the X-ray emitting probe I (13) and the X-ray receiving probe I (14) are started, the longitudinal thickness of the steel plate to be measured (10) is transmitted to the PLC controller (8), and the real-time display is carried out on the display screen (7); the logic analysis in the PLC controller (8) online calculates and extracts the real-time longitudinal thickness deviation, and compares the real-time longitudinal thickness deviation with the system set longitudinal thickness allowable deviation; when the real-time longitudinal thickness deviation is less than the system set longitudinal thickness allowable deviation, the cold rolling process is normal; otherwise, the system alarm platform is started, and the production of the abnormal cold-rolled oriented silicon steel plate is terminated.

6. The method of claim 4, wherein, In step (2), the specific working process of the transverse thickness gauge is as follows: when the steel plate to be measured (10) passes through the transverse thickness gauge (5), the X-ray detection probe, the transverse moving device and the reciprocating driving device are started, the X-ray detection probe measures the transverse thickness of the steel plate following the transverse moving device, and the reciprocating driving device drives the C-shaped bracket II (20) to move at the same speed as the steel plate, so as to realize the transverse thickness detection of different points at the same transverse position in the longitudinal movement, and the transverse thickness of the cold-rolled oriented silicon steel plate measured by the X-ray detection probe is transmitted to the PLC controller (8) and displayed in real time on the display screen (7); the logic analysis in the PLC controller (8) online calculates and extracts the real-time transverse thickness deviation, and compares the real-time transverse thickness deviation with the system set transverse thickness allowable deviation; when the real-time transverse thickness deviation is less than the transverse thickness allowable deviation, the cold rolling process is normal; otherwise, the system alarm platform is started, and the production of the abnormal cold-rolled oriented silicon steel plate is terminated.

7. The method of claim 4, wherein, In step (2), the logic analysis in the PLC controller (8) online calculates and extracts the real-time nominal thickness deviation, and automatically compares the real-time nominal thickness deviation with the system set nominal thickness allowable deviation; when the real-time nominal thickness deviation is less than the nominal thickness allowable deviation, the cold rolling process is normal; otherwise, the system alarm platform is started, and the production of the abnormal cold-rolled oriented silicon steel plate is terminated.

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