CN-122007169-A - Anti-slip scratch water-proof roller system for continuous rolling of thin-specification steel strip and control method

Abstract

The invention relates to the field of metal pressure processing, discloses a slip-resistant scratch-resistant water-proof roller system for continuous rolling of thin-specification steel belts and a control method, and aims to solve the problems that the water-proof roller slips and scratches the steel belts due to fluid dynamic pressure effect during high-speed continuous rolling of the thin-specification steel belts. The method comprises the steps of obtaining linear speeds, acting loads and cooling liquid environment parameters of a steel belt and a water-proof roller in real time, constructing a slip rate monitoring model, calculating fluid dynamic pressure distribution characteristics, judging slip risk levels, dynamically adjusting compaction loads or active driving torques to offset floating lift force generated by fluid dynamic pressure, maintaining a critical static friction state, and correcting control parameters in real time through feedback monitoring. The system comprises a sensor array, a control unit, an actuating mechanism and a water isolation roller with a drainage structure. According to the invention, through active compensation and closed-loop control, the running synchronization precision of the equipment is improved, the defect of steel belt slip scratch is effectively eliminated, the adaptability to the working condition of the polar end is enhanced, and the service life of the equipment is prolonged.

Inventors

• SUN ZENGLI
• LI FENG
• YUE QI

Assignees

• 山东宏旺实业有限公司

Dates

Publication Date

20260512

Application Date

20260330

Claims (10)

1. 1. The method for controlling the anti-skidding scratch water-proof roller for continuous rolling of the thin-specification steel belt is characterized by comprising the following steps of: S1, acquiring a linear velocity signal, a rotation linear velocity signal of a water-proof roller, an acting load of the water-proof roller on the surface of the thin steel strip and a cooling liquid environment parameter at the inlet side of a roller gap of the water-proof roller in real time through a sensor array; s2, constructing a slip rate monitoring model according to the linear velocity signal and the rotating linear velocity signal, and solving fluid dynamic pressure distribution characteristics of a contact interface of the water-proof roller and the thin-specification steel belt by combining the cooling liquid environment parameter so as to judge the slip risk level under the current working condition; S3, outputting an adjusting instruction to an executing mechanism according to the slip risk level, and dynamically adjusting the compaction load or the active driving torque of the water-proof roller to offset the radial floating force generated by the hydrodynamic effect and maintain the critical static friction state between the thin steel belt and the water-proof roller; and S4, continuously monitoring the interface contact state after adjustment, and correcting the control parameters in real time through iterative compensation logic according to the change rate of the slip rate.
2. 2. The method according to claim 1, wherein the sensor array in step S1 includes a laser doppler velocimeter mounted above a frame in front of the water-proof rolls for capturing the linear velocity of the thin gauge steel strip, a high precision rotary encoder, and a load sensor disposed on the water-proof roll support.
3. 3. The method according to claim 1, wherein the coolant environment parameters in step S1 include the flow rate of the coolant, the spray pressure, and the temperature in the runner.
4. 4. The method according to claim 1, wherein the step S2 of calculating the hydrodynamic distribution characteristics includes establishing a fluid lubrication model based on Reynolds equation, the fluid lubrication model introducing dynamic viscosity of the coolant, surface roughness of the thin gauge steel strip, and convergent wedge interval geometric parameters of the thin gauge steel strip and the hydrodynamic pressure to quantify the reduction degree of the effective positive pressure of the interface.
5. 5. The method for controlling a water-proof and scratch-resistant water-proof roller for continuous rolling of thin-gauge steel strip according to claim 1, wherein in step S2, the slip risk level is divided according to the magnitude of the slip rate, the corresponding initial risk level is determined when the slip rate exceeds a preset low-order threshold value, the corresponding high-order risk level is determined when the slip rate exceeds a preset high-order threshold value, and the control unit matches corresponding response strategies according to the risk levels of different levels.
6. 6. The method for controlling a slip-resistant and scratch-resistant water-proof roll for continuous rolling of thin-gauge steel strip according to claim 1, wherein the actuator in the step S3 comprises a servo hydraulic cylinder or a proportional control cylinder, and the oil inlet amount and pressure of the servo hydraulic cylinder are controlled by an electro-hydraulic proportional valve to realize the adjustment of the compaction load.
7. 7. The method for controlling a slip-preventing and scratch-preventing water-stop roller for continuous rolling of thin gauge steel strip according to claim 1, wherein the active driving torque in step S3 is provided by a variable frequency motor whose operation mode is switched between rotation speed control and torque control, and the variable frequency motor increases the driving torque to compensate for friction loss caused by hydrodynamic pressure when a slip trend is recognized.
8. 8. The method for controlling a slip-resistant and scratch-resistant water-stop roll for continuous rolling of thin gauge steel strip according to claim 1, further comprising scanning the surface of the thin gauge steel strip passing through the water-stop roll with a linear array camera, recognizing whether there is a streak-like scratch due to instantaneous slip, and feeding back the recognition result to a control unit.
9. 9. A slip and scratch resistant water-resistant roller system for tandem rolling of thin gauge steel strip, comprising: The sensor array is used for acquiring a linear speed signal, a rotation linear speed signal of the water-proof roller, an acting load of the water-proof roller on the surface of the thin-specification steel belt and a cooling liquid environment parameter at the roller gap inlet side of the water-proof roller in real time in the running process of the thin-specification steel belt; A control unit for executing the control method according to any one of claims 1 to 8; the execution mechanism is driven by the control unit and is used for dynamically adjusting the compaction load or the active driving torque of the water-proof roller; the waterproof roller comprises a metal mandrel and a wear-resistant synthetic rubber layer coated on the outer layer of the metal mandrel, wherein drainage threads or cross grid grooves with a preset depth are processed on the surface of the wear-resistant synthetic rubber layer.
10. 10. The anti-slip, scratch marine riser system for tandem rolling of thin gauge steel strip of claim 9 wherein the actuator further comprises a piezoceramic actuator mounted on the marine riser support arm, the control unit applying a high frequency oscillating pressure component through the piezoceramic actuator to disrupt the continuity of the interfacial liquid film.

Description

Anti-slip scratch water-proof roller system for continuous rolling of thin-specification steel strip and control method Technical Field The invention belongs to the field of metal pressure processing, and particularly relates to a skid and scratch prevention water-proof roller system for continuous rolling of thin steel strips and a control method. Background The cold continuous rolling and finish rolling process of the metal strip is a core link for producing high-performance thin-specification steel strips, and the production efficiency and the surface quality of the metal strip directly determine the final performance of subsequent deep-processing products. In the continuous rolling process, in order to ensure the stable state of the steel strip between different rolling mill frames or process sections, the surface of the steel strip is usually required to be cooled and cleaned at high frequency, so as to realize accurate control of the temperature and the surface cleanliness of the strip. In particular, to prevent the cooling medium or cleaning fluid from entering the subsequent dry zone with the steel strip traveling at high speed, a rotating, water-tight roll system is typically provided at the end of the process section. The system generates sealing compaction force through physical contact between the roller surface and the moving steel belt, and aims to block follow-up migration of a liquid film, so that synchronous stability of drying environment and belt surface tension in subsequent procedures is ensured. However, in the prior art, with continuous improvement of continuous rolling speed and development of extremely thin steel strip specifications, it is difficult for the conventional water-proof roller system to maintain the water-proof effect and simultaneously consider the motion synchronism of the roller surface. Because the thin steel belt can drive a large amount of cooling liquid with certain kinetic energy to accumulate at the inlet side of the roll gap under high-speed running, a fluid lubrication film with dynamic pressure effect is easily formed between the roll and the belt, and the fluid dynamic pressure can greatly reduce the effective friction coefficient between interfaces, so that the instant slip of the water-proof roll relative to the steel belt is caused. Once the speed instability occurs, the roller surface in a dynamic slipping state can generate severe mechanical friction with the surface of the steel belt, so that irreparable scratch defects appear on the surface of the steel belt, and the yield and the surface consistency of the high-precision thin-specification belt are seriously affected. Disclosure of Invention The invention aims to provide a skid and scratch prevention water-proof roller system for continuous rolling of thin steel strips and a control method, which can effectively solve the problems in the background technology. In order to achieve the aim, the technical scheme adopted by the invention is that the anti-slip scratch waterproof roll system for continuous rolling of the thin steel strip and the control method thereof comprise the following specific steps: S1, acquiring a linear velocity signal of a thin-specification steel belt in the running process and a real-time rotating linear velocity signal of a water-proof roller in real time through a sensor array, and synchronously acquiring an acting load of the water-proof roller on the surface of the thin-specification steel belt and a cooling liquid environment parameter at the inlet side of a roller gap; S2, constructing a slip rate monitoring model based on the acquired linear velocity signal and the real-time rotating linear velocity signal, calculating hydrodynamic pressure distribution characteristics of a contact interface of the water-proof roller and the thin-specification steel belt by combining the environmental parameters of the cooling liquid, and judging the slip risk level under the current working condition; S3, outputting an adjusting instruction to an executing mechanism through a control unit according to the slip risk level, and dynamically adjusting the compression load or the active driving torque of the water-proof roller to offset the radial floating force generated by the hydrodynamic effect, so as to maintain the critical static friction state between the thin steel belt and the water-proof roller; and S4, continuously carrying out feedback monitoring on the adjusted interface contact state, and correcting control parameters in real time through an iteration compensation logic to ensure that the water-isolation roller and the thin-specification steel belt keep synchronous operation in the high-speed continuous rolling and specification switching process. Preferably, the sensor array in step S1 includes a laser doppler velocimeter, a high-precision rotary encoder, and a load sensor disposed on a supporting seat of the marine riser, where the laser doppler velocimeter is installed abo