A four-point straightening force online quick correction method of a full hydraulic roller straightener

Abstract

This invention relates to the field of straightening technology in metallurgical plate production, and in particular to a method for online rapid correction of four-point straightening force in a fully hydraulic roller straightener. The method first tracks the straightening process of multiple consecutive steel plates, recording the changes in straightening force at four points. Correction is performed during the time interval between the entry of the next steel plate into the straightener. After the straightening roller gap automatically rises to the target value of the exit roller gap, the system switches back to manual mode. A fine-tuning input is made for the roller gap base value corresponding to the location with the largest deviation in the four-point straightening force. The roller gap correction mode is activated, and a calibration operation is performed until the roller gap base value displayed on the monitoring interface is updated to the fine-tuning input value, completing the roller gap fine-tuning. This invention solves the problem of steel plate misalignment or straightening roller surface distortion caused by large straightening force deviations in fully hydraulic roller straighteners. It allows for rapid online adjustment during production without stopping the machine, thus improving production efficiency and fault control.

Description

Technical Field

[0001] This invention relates to the field of straightening technology in metallurgical plate production, and in particular to a method for rapid online correction of four-point straightening force in a fully hydraulic roller straightener. Background Technology

[0002] When a fully hydraulic roller straightener straightens steel plates, the four-point straightening force fluctuates. When this fluctuation occurs regularly at one or more points, two main types of problems can easily occur: first, a large straightening force on the same side causes the straightened steel plate to deviate; second, a large straightening force diagonally causes the straightening roller surface to twist. Both of these negatively impact the equipment and the quality of the steel plate. Furthermore, each shutdown and recalibration generates significant downtime, affecting production organization and downtime control. Therefore, this invention proposes an online rapid correction method for the four-point straightening force of a fully hydraulic roller straightener. Summary of the Invention

[0003] To address the aforementioned technical problems and solve the issue of large deviations in straightening force, this invention proposes an online rapid correction method for the four-point straightening force of a fully hydraulic roller straightener. This method uses data from the calibration of the fully hydraulic straightener as a benchmark, and the four-point straightening force displayed on the operation interface, as well as the difference between the inlet and outlet straightening forces, as the basis for adjustment and correction. This method aims to achieve rapid prevention and control.

[0004] This solution provides a method for rapid online correction of the four-point straightening force of a fully hydraulic roller straightener. This method is implemented during the production process after the fully hydraulic roller straightener has completed self-calibration and been put into operation, without requiring machine downtime. The specific steps include: S1. Pattern Tracking: Track the straightening process of multiple steel plates in succession, monitor and record the changes in straightening force at four points, and identify the regularity of excessive deviation in straightening force at four points; S2. Gap Correction: Utilize the time gap between the end of the straightening of the previous steel plate leaving the straightening machine and the entry of the next steel plate into the straightening machine to perform a correction operation; S3. Mode switching and roll gap reset: On the straightener monitoring and operation interface, switch the control mode from automatic mode to manual mode; input the exit roll gap target value in the first-level setting and confirm, then switch back to automatic mode. After the straightener roll gap automatically rises to the exit roll gap target value, switch back to manual mode. S4. Parameter fine-tuning and calibration: Enter the parameter calibration interface, and fine-tune the roll gap base value corresponding to the position with the largest straightening force deviation at the four points. The input value is determined based on the current base value and the preset fine-tuning amount; activate the roll gap correction mode and perform the calibration operation until the roll gap base value displayed on the monitoring interface is updated to the fine-tuning input value, and the roll gap fine-tuning is completed. S5. Resume Production Verification: Return to the main control page of the straightener, switch the control mode from manual mode to automatic mode, and activate the secondary input, thickness control roll gap and thickness control speed functions, and wait for the next steel plate to enter for straightening verification; S6. Cyclic Correction: Repeat steps S1 to S5 until the deviation of the four-point straightening force is controlled within the preset requirement range.

[0005] The technical solution further defined in this invention is: Furthermore, in step S1, the thickness of the tracked steel plate ranges from 20mm to 30mm, and the number of tracked steel plates is 5 to 10.

[0006] Furthermore, in step S3, the target value of the exit roll gap is set to 30mm; specifically, in manual mode, 30mm is entered in the exit roll gap input box in the first-level setting and confirmed, then switched to automatic mode and waited for the actual position of the roll gap to reach 30mm before switching back to manual mode.

[0007] Furthermore, in step S4, the specific steps for fine-tuning the roll gap base value corresponding to the location with the largest deviation of the four straightening forces are as follows: If a downward adjustment is required for this orientation, the input fine-tuning value should be greater than the current roll gap base value. If an upward adjustment is required for this orientation, the input fine-tuning value should be less than the current roll gap base value.

[0008] Furthermore, when the pressure baseline value on the inlet operation side is detected to be at its maximum and negative, it is determined that the side needs to be adjusted downwards. At this time, the value entered in the roller gap input box on the inlet operation side of the parameter calibration interface is 0.1mm larger than the current baseline value.

[0009] Furthermore, in step S4, after performing the calibration operation, a verification step is also included: observe the displayed value of the roll gap base value at the bottom of the interface. If the displayed value has not changed, click the calibration button again to perform the calibration again until the displayed value is updated.

[0010] The beneficial effects of this invention are: (1) This invention uses the data of the fully hydraulic straightening machine during calibration as the benchmark value, and uses the four-point straightening force displayed on the operation interface and the difference between the inlet and outlet straightening forces as the basis for adjustment and correction. It proposes a method for quickly correcting the four-point straightening force during online production to achieve rapid prevention and control. (2) The method of the present invention solves the problem of steel plate deviation or straightening roller surface distortion caused by large deviation of straightening force in fully hydraulic roller straightener. It can be quickly adjusted online during production without stopping the machine, which helps to improve production efficiency and fault control. It can be applied to the rapid adjustment and correction when the difference of straightening force at four points is too large during the production process of fully hydraulic straightener, avoiding the occurrence of rapid unloading and deviation of straightened steel plate during the straightening process, and fundamentally ensuring the stability of the straightener roller box. Detailed Implementation

[0011] The online rapid correction method for the four-point straightening force of the fully hydraulic roller straightener of the present invention, from the end of calibration and when the deviation of the four-point straightening force is too large, shall be operated in the following manner.

[0012] 1. Track the straightening process of 5-10 steel plates with a thickness of 20-30mm and find the regular changes in the straightening force at four points.

[0013] 2. Make quick adjustments by utilizing the time interval between the end of straightening the previous steel plate and the start of straightening the next steel plate.

[0014] 3. In the straightening machine monitoring interface, first use the mouse to switch from automatic mode to manual mode. Then, enter 30mm in the exit roll gap setting and press Enter. Switch back to automatic mode; the roll gap will automatically rise to 30mm. Once the roll gap has automatically risen to 30mm, switch back to manual mode. The displayed pressure baseline value on the inlet operation side will be at its maximum and will be negative.

[0015] 4. Click on the parameter calibration interface, enter 30.1mm in the inlet operation side roll gap and press Enter (Note: If the entered value is larger than the baseline value, it will be pressed down; if it is smaller, it will be raised). Click on the roll gap correction mode with the mouse. The word "Calibration" will appear below. Click on calibration again and observe whether the roll gap baseline value below has changed (to prevent duplicate calibration). If the baseline value changes from 30mm to 30.1mm, it means that the roll gap has been fine-tuned. If the baseline value changes, click on calibration again and observe.

[0016] 5. Finally, click to return to the main control page of the straightening machine, switch from manual mode to automatic mode, and turn on "Secondary Input", "Thickness Control Roller Gap" and "Thickness Control Speed" to wait for the straightening verification of the next steel plate.

[0017] 6. Repeat this operation until the straightening force at the four points is controlled within the required range.

[0018] In addition to the embodiments described above, the present invention may have other implementations. All technical solutions formed by equivalent substitution or equivalent transformation fall within the protection scope claimed by the present invention.

Claims

1. A method for rapid online correction of four-point straightening force in a fully hydraulic roller straightener, characterized in that, Includes the following steps: S1. Track the straightening process of multiple steel plates in succession, monitor and record the change data of the straightening force at four points, and identify the regularity of excessive deviation of the straightening force at four points. S2. Utilize the time gap between the end of the straightening of the previous steel plate leaving the straightening machine and the entry of the next steel plate into the straightening machine to perform a correction operation; S3. On the straightening machine monitoring and operation interface, switch the control mode from automatic mode to manual mode; input the target value of the exit roll gap in the first-level setting and confirm, then switch back to automatic mode. After the straightening roll gap automatically rises to the target value of the exit roll gap, switch back to manual mode. S4. Enter the parameter calibration interface, and fine-tune the roll gap base value corresponding to the position with the largest straightening force deviation at the four points. The input value is determined based on the current base value and the preset fine-tuning amount. Activate the roll gap correction mode and perform the calibration operation until the roll gap base value displayed on the monitoring interface is updated to the fine-tuning input value, and the roll gap fine-tuning is completed. S5. Return to the main control page of the straightener, switch the control mode from manual mode to automatic mode, and activate the secondary input, thickness control roll gap and thickness control speed functions, and wait for the next steel plate to enter for straightening verification. S6. Repeat steps S1 to S5 until the deviation of the four-point straightening force is controlled within the preset requirement range.

2. The method for online rapid correction of four-point straightening force in a fully hydraulic roller straightener according to claim 1, characterized in that, In step S1, the thickness of the tracked steel plate ranges from 20mm to 30mm, and the number of tracked steel plates is 5 to 10.

3. The method for online rapid correction of four-point straightening force in a fully hydraulic roller straightener according to claim 1, characterized in that, In step S3, the target value of the exit roll gap is set to 30mm; specifically, in manual mode, 30mm is entered in the exit roll gap input box in the first-level setting and confirmed, then switched to automatic mode and waited for the actual position of the roll gap to reach 30mm before switching back to manual mode.

4. The method for online rapid correction of four-point straightening force in a fully hydraulic roller straightener according to claim 1, characterized in that, In step S4, the specific steps for fine-tuning the roll gap base value corresponding to the location with the largest deviation of the four-point straightening force are as follows: If a downward adjustment is required for this orientation, the input fine-tuning value should be greater than the current roll gap base value. If an upward adjustment is required for this orientation, the input fine-tuning value should be less than the current roll gap base value.

5. The method for online rapid correction of four-point straightening force in a fully hydraulic roller straightener according to claim 4, characterized in that, When the pressure baseline value on the inlet operating side is detected to be at its maximum and negative, it is determined that the side needs to be adjusted downwards. At this time, the value entered in the roller gap input box on the inlet operating side of the parameter calibration interface is 0.1mm larger than the current baseline value.

6. The method for online rapid correction of four-point straightening force in a fully hydraulic roller straightener according to claim 1, characterized in that, In step S4, after performing the calibration operation, a verification step is also included: Observe the basic value of the roll gap displayed at the bottom of the interface. If the displayed value does not change, click the calibration button again to execute the calibration again until the displayed value is updated.