115results about "Rare end control device" patented technology

The invention relates to the technical field of hot-rolled strips, in particular to a three-point difference dynamic adjusting method in the rolling process of hot-rolled strips, which comprises the following steps: S1, preparation before rolling and parameter initialization: roller shape matching and model parameter preloading; s2, dynamic regulation and control at the threading stage: thickness pre-compensation and temperature gradient suppression; s3, steady-state rolling control is conducted, specifically, three-point difference real-time monitoring and compensation are conducted, and thermal convexity dynamic compensation is conducted; and S4, drifting and exception handling: tail stability control and intelligent transition material insertion. According to the method, a full-process control system covering dynamic roll gap regulation and control, temperature-stress coupling compensation and intelligent decision support is constructed, and the problems that head and tail thickness fluctuation is difficult to restrain and edge thinning exceeds the standard by developing an asymmetric roll bending force distribution model and a rolling rhythm self-adaptive roll type matching strategy through traditional single-point thickness control can be effectively solved.

The invention discloses a detection device for rapidly measuring strip steel deviation by adopting an AI visual identification technology, and relates to the technical field of strip steel processing, the detection device comprises a device support, a linear array camera and a visual identification system, the visual identification system comprises an image acquisition unit, an image analysis unit, an environment compensation unit, a deviation prediction unit and a result output unit; real-time image data of a strip steel edge area are collected in real time through a linear array camera, the real-time image data are analyzed through a deep learning model, strip steel edge pixel-level coordinates and image abnormal feature points are output, then distance data and inclination angle data are obtained, fusion correction is carried out through output of a Kalman filter and an AI processing module, and the accuracy of strip steel edge detection is improved. And the correction unit is used for obtaining corrected image data, establishing a strip steel deviation characteristic model based on a convolutional neural network, inputting the corrected image data into the strip steel deviation characteristic model, extracting strip steel deviation characteristics, calculating a strip steel deviation probability and sending the strip steel deviation probability to the result output unit.

To reduce thickness defects at a tail end part of a rolled material, reduce a meandering amount of the rolled material, and suppress occurrence of drawing, in continuous rolling.SOLUTION: There is provided a meandering control method of a rolled material for controlling meandering a rolled material in an M-th stand (1≤M≤N) in rolling of a rolled material by N pieces (N is natural number) of rolling stands which controls at least any one of a roll gap of the M-th stand, roll speed, a lubricant supply amount, a bending force, a roll cross angle, a roll shift amount and a roll crown so that a first kind of parallel rigidity that is an index indicating a degree of meandering of the rolled material when a tail end part of the rolled material passes through the M-th stand decreases while passing the rolled material through the stand at any time.SELECTED DRAWING: Figure 18

The application provides a method for improving the execution precision of a reversible rough rolling mill tail short stroke, and relates to the technical field of industrial automation. The method sets three heat detectors at the entrance of the vertical roll mill, sets the short stroke parameters of the vertical roll mill at each pass tail when the slab is discharged, when the odd pass is detected, the first heat detector detects the loss, and the tail position is tracked according to the set vertical roll mill current pass back slip and actual speed; when the second heat detector detects the loss, the actual back slip value of the vertical roll is calculated according to the distance between the first two heat detectors and the tracking length, and the tracking length is corrected, and the tail is continuously tracked; when the third heat detector detects the loss, the back slip value and the tail tracking position are continuously corrected; when the distance between the tail and the vertical roll mill reaches the start distance of the short stroke, the vertical roll gap is adjusted according to the set value; when the tail leaves the vertical roll, the vertical roll mill keeps the current position until the tail of the steel plate leaves the flat roll mill. The method realizes the real back slip of the vertical roll mill through multiple heat detectors, and improves the tail tracking precision and the width control precision.

The invention discloses a 2.0 mm thin material production efficiency improving method which is applied to a hot continuous rolling production line, and the hot continuous rolling production line comprises a rough rolling area and a finish rolling area. In the advancing direction of the thin material, rough rolling mills R1 and R2 are arranged in the rough rolling area, and finish rolling mills F1-Fn are arranged in the finish rolling area; a roller way area E3 is arranged in the rough rolling area and the finish rolling area, and a roller way G and a coiling and feeding roller are arranged behind the finish rolling machine Fn; the method comprises the steps that the variety and the specification size of a thin material entering a hot continuous rolling production line are limited; according to the variety and width specification of the thin material entering the rough rolling area, the speed of the last pass of R1 and R2 is set; the set steel biting speed of the coil steel on the finishing mill Fk before the first time and the set steel biting speed of the coil steel on the finishing mill Fk after the first time are obtained; based on the sum, obtaining an alarm time interval; and setting an alarm threshold value t, and triggering an alarm at t. The production efficiency and the product quality of the 2.0 mm thin material are obviously improved through the optimal design of the intermediate billet in the rough rolling area and the intelligent control of the rough rolling area and the finish rolling area.

The invention relates to a control method for preventing turning lines of a six-roller cold-rolling mill, which comprises the following steps of: (1) when the cold-rolling mill adjusts a rolling line, placing a cushion block between working roller seats on the same side of an upper working roller and a lower working roller to ensure that single-side roller surfaces of the upper working roller and the lower working roller are not pressed firstly; the cushion block is taken out after the rolling line is adjusted; (2) completing calibration and warm roller operation of a working roller; (3) controlling a roll gap pressing process: setting a normal pressing gradient of the roll gap; when the roll gap is larger than 5000 microns, the pressing gradient is a normal pressing gradient; when the roll gap is 3000-5000 [mu] m, the pressing gradient is half of the normal pressing gradient; when the roll gap reaches the target value from 3000 microns, the pressing gradient is one third of the normal pressing gradient; and (4) tension building and vehicle starting process control. And turning marks are reduced or eliminated, and the surface quality of products is improved.

The invention provides a method for improving IF steel ferrite rolling end quality and prepared IF steel, and relates to the technical field of IF steel preparation. The method comprises the steps that a to-be-rolled plate blank is obtained; rough rolling is conducted on the to-be-rolled plate blank, and an intermediate blank is obtained; the width of the intermediate billet is reduced through an E2 vertical roller, and the intermediate billet with the width reduced is obtained; the width-reduced intermediate billet is subjected to finish rolling and high-temperature coiling, and an IF steel hot-rolled strip coil is obtained; wherein the rolling tonnage of the E2 vertical roll is smaller than 300,000 tons, the hardness on-machine standard of the E2 vertical roll is larger than or equal to 50 HSD, and the finish rolling process and the high-temperature coiling process are both in an air cooling state. The quality of the ferrite rolling end face can be improved by controlling the quality and hardness of the vertical roll surface; and by controlling the cooling mode, static recrystallization of ferrite at the edge can be promoted, and the quality of the end of the strip steel is further improved. According to the method, by optimizing the hot rolling process, the microstructure of the edge of the strip steel can be obviously improved, and therefore the quality of the IF steel ferrite rolling end is improved.

This control device for a rolling device is to be used for controlling a rolling device including a pair of rolling rolls provided so as to sandwich a metal plate, and a winding machine for winding the metal plate rolled by the pair of rolling rolls, the control device being configured such that after the distal end part of the metal plate is passed between the pair of rolling rolls in a state in which a gap between the pair of rolling rolls is greater than the plate thickness of the metal plate, the pair of rolling rolls are rotated so that the distal end part of the metal plate reciprocates between the pair of rolling rolls and the winding machine before the distal end part of the metal plate reaches the winding machine, in a state in which a distal-end-part tension applied to the distal end part of the metal plate is zero and in which the metal plate is pressed down by the pair of rolling rolls.

The application provides a preparation method of a hot-rolled strip steel of Cr-Mo steel material, the Cr-Mo steel material contains Cr: 0.80-1.10wt%, Mo: 0.15-0.25wt%, the laminar cooling process adopts U-shaped cooling, after the strip steel head passes through the last rack in the multi-rack finishing rolling process, the pinch roll cooling water, the coiling roll cooling water and the mandrel cooling water are closed, after the coiling mandrel is built for a period of time, the pinch roll cooling water and the coiling roll cooling water are opened, the multi-rack finishing rolling process is ended, after the strip steel is tail thrown from the last rack for a period of time, the pinch roll cooling water and the coiling roll cooling water are closed, the mandrel cooling water is opened after the strip steel is discharged from the coiling machine, vertical transportation is adopted after the coiling is unloaded, the steel coil after rolling is placed for slow cooling in the warehouse area, so that the mechanical property uniformity of the steel coil can be obviously improved, the performance stability is improved, the thickness fluctuation of the cold rolling process is reduced, and the flatness quality of the product is improved.

The present invention relates to a rolling mill (100) and method for hot rolling a metal strip (20) through at least one finishing roll stand (110). After finish rolling, the flatness of the metal strip (20) is measured, and the metal strip is then wound by a winding device (160). To improve the results of the flatness measurement, the rolling mill (100) and method of the present invention contemplate that the metal strip is cross-cut into individual strip portions (20') by a cutting device (13) after passing through the last finishing roll stand (110) and before being wound. The flatness measurement of the present invention is performed without causing tensile stress to at least the individual strip portions (20') after cross-cutting the metal strip and before passing through a drive device (150) upstream of the winding device (160).

The application relates to a rolling piece head tracking method for a hot rolling and coiling production line, the hot rolling and coiling production line comprising a rolling channel for conveying a rolling piece, pinch rolls matched with the rolling channel, and detection elements arranged directly above the rolling channel, and the method comprises the following steps: acquiring a head signal of the rolling piece, starting tracking and recording first tracking data S1; acquiring a signal that the rolling piece reaches the pinch rolls, stopping tracking; acquiring a horizontal installation interval L between the detection elements and the pinch rolls, and correcting the first tracking data S1 to S1=L; the method does not need to additionally increase the detection elements, reduces the cost of rolling piece head tracking, can reduce error correction caused by error signals of the increased detection elements, and guarantees the accuracy and reliability of rolling piece head position tracking; the correction means is not referenced by light signals, and can effectively avoid the influence of interference sources such as water vapor, fog, light pollution and the like in the field environment.

The present invention relates to a method for cross-process shape feedforward control of strip steel applicable to a continuous annealing and tempering unit, comprising: performing pattern recognition on the shape of the strip steel at the outlet of the cold tandem rolling mill; based on the recognized pattern, using a defect prediction model to predict the waviness defect data of the strip steel shape at the outlet of the cold tandem rolling mill; based on the waviness defect data, using a quality prediction model for the inheritance and evolution of the strip steel shape quality before and after continuous annealing to predict the actual shape quality of the strip steel after continuous annealing; converting the actual shape quality into the IU value distribution of the strip steel at the inlet of the tempering mill, and based on the IU value distribution of the strip steel at the inlet of the tempering mill, performing bending roll force feedforward control of the strip steel shape. The present invention can solve the problem of poor control accuracy of the shape control in the existing continuous annealing and tempering unit, thereby significantly improving the shape quality of the strip steel product.

The invention relates to a control method for preventing rough rolling upwarp during low-temperature production of non-oriented silicon steel, which comprises the following steps: adopting a hot charging and hot delivery process for a non-oriented silicon steel slab, and controlling the temperature difference between the upper surface and the lower surface of the slab within 10 DEG C after the slab enters a second heating section; the total heating time of the second heating section and the soaking section is not less than 70 minutes, and the total time of the second heating section and the soaking section in the furnace is 170-230 minutes; the tapping temperature of the plate blank is 1100-1120 DEG C; the R2 rolling mill working roll is pressed downwards, and the roll diameter difference is 1-2 mm; and the rolling reduction rate of the fourth pass of rough rolling is controlled to be 20%-25%. By controlling the charging temperature of the plate blank, the temperature difference between the upper surface and the lower surface of the plate blank when the plate blank enters the furnace, the heating temperature and time of each section and controlling the reduction rate of the fourth pass of rough rolling and the R2 working roller, the head warping phenomenon after low-temperature heating during rough rolling is effectively controlled, energy is saved, accidents caused by head warping of the plate blank are prevented, and the production efficiency is improved. And the excellent magnetic performance of the low-temperature non-oriented silicon steel product is ensured.

The application relates to the technical field of steel rolling, and discloses a hot continuous rolling strip head thickness deviation control method and device and electronic equipment. The method comprises the following steps: acquiring an actual head thickness value of a current strip in a hot continuous rolling mill rolling process and a target head thickness value of the current strip; determining a head thickness deviation value of the current strip according to the actual head thickness value and the target head thickness value; acquiring an actual rolling force of the current strip and a calculated rolling force of the current strip; determining a rolling force deviation value of the current strip according to the actual rolling force and the calculated rolling force; and determining a target set rolling force of a next coil of the current strip according to the head thickness deviation value and the rolling force deviation value. The technical scheme disclosed by the application can effectively improve the strip head thickness deviation problem caused by the rolling force setting calculation deviation, reduce the thickness out-of-tolerance occurrence rate, improve the product thickness control precision and the yield rate.

The invention relates to a method for controlling a stretch-reducing mill in which tube ends of stretched tubes are optimised by controlling one or more motors of the stretch-reducing mill (1), said method comprising at least one wall thickness measurement on the discharge side and automatic adaptation of the magnitude of the change in the speed of the motors to the tube wall thickness profile, wherein the development over time of the changes in the speed of individual or all the motors is adapted automatically on the basis of the tube wall thickness measurement values.

The invention belongs to the technical field of bar rolling, and discloses a control method for eliminating a deformed steel bar shearing end face elbow, which comprises the following steps: S1, arranging a compression roller at an inlet of a cooling bed; s2, positions of movable teeth and static teeth of the cooling bed are calibrated; S3, the mounting height of the arrangement chain is adjusted to eliminate the height difference between the arrangement chain and the movable teeth of the cooling bed; s4, a dense arrangement roller and a tail sweeping device are arranged; a head water cooling device is mounted at the end of the cooling bed; s6, optimizing the replacement mode of the cold shear blade and the mounting structure of the front cover plate of the shear blade; through multi-link targeted control, key inducements causing the deformed steel bar shearing end face elbow are eliminated from the source, the problem of shearing end face elbow puzzling small-specification deformed steel bar production for a long time is effectively solved, the shape of the end of a finished product is regular, the packaging quality of the small-specification finished product is greatly improved, and the production cost is reduced. And the problems of disordered packaging arrangement, difficult packaging and the like caused by bends are avoided.

The invention provides a coiling side guide plate control method and system, and the method comprises the steps: S1, after strip steel enters a side guide plate, the side guide plate executes two times of short-stroke actions, and after the head of the strip steel enters a pinch roll, the side guide plate enters a pressure control mode according to a set pressure; s2, in the pressure control mode, when the total pressure of the two sides exceeds two times or more of the set pressure, the side guide plate locks the current position and exits from the pressure control mode; s3, in the position control mode, when the total pressure is increased, the opening degree of a side guide plate is correspondingly increased, the positions on the two sides are also increased accordingly, and it is ensured that the strip steel is aligned with the rolling center line; and S4, when the side guide plate is kept in the pressure control mode and the tail of the strip steel throws steel from the finishing mill, if the pressure is continuously increased and the position of the side guide plate is opened to the set value of the width of the strip steel, the pressure control mode is quitted, and the current position is locked. The problems of side guide plate steel clamping, staggered layer edge forming and the like caused by a single control mode can be avoided.

The invention relates to the technical field of metallurgical automatic control, and discloses a hot continuous rolling finish rolling tail automatic deviation correction method, which comprises the following steps: firstly, defining relevant parameters, for example, using a finish rolling mill with an automatic deviation correction function as Fx, and defining a calculation mode of rolling force and roll gap deviation; after the finishing mill Fx-3 throws steel, the rolling force deviation of Fx-1 is sampled and locked; and after Fx-2 steel throwing, the tail deviation direction is judged according to the deviation variable quantity and the locking value of Fx-1, and meanwhile, the rolling force deviation of Fx is sampled and locked. And after Fx-1 steel throwing, the deviation direction is judged in the same way. And then the deviation directions of the Fx and the Fx-1 are compared, the roll gap deviation adjustment amount of the Fx is calculated, amplitude limiting is set, and real-time adjustment is conducted after the Fx-1 is subjected to steel throwing. And after the Fx is subjected to steel throwing, the tail deviation rectification adjustment amount is reset. The method can effectively solve the drifting problem caused by temperature reduction of the strip steel tail of the finishing mill, has great significance in improving the rolling stability of the tail of the finishing mill, and can reduce the roller replacement frequency and improve the production efficiency.

The invention discloses a pipeline steel finishing mill group, a control method and device thereof and a medium. The finishing mill group comprises a plurality of finishing mill racks, each finishing mill rack comprises a working roller group arranged at an inlet of the rack, each working roller group comprises an upper working roller and a lower working roller which are arranged on the two opposite sides of the slab conveying belt, and the upper working roller is provided with a first roller gap cooling water collecting pipe and a first roller cooling water collecting pipe. The lower working roll is provided with a second roll gap cooling water collecting pipe and a second roll cooling water collecting pipe, and the method comprises the following steps: after a first duration from the starting moment when a plate blank of the pipeline steel enters the working roll group, controlling the second roll cooling water collecting pipe to be opened; and / or the second roll gap cooling water collecting pipe is controlled to be opened before the plate blank of the pipeline steel enters the working roll set, and the first roll gap cooling water collecting pipe is controlled to be opened after a second duration from the starting moment when the plate blank of the pipeline steel enters the working roll set. Therefore, the problem that the head of the plate blank of the pipeline steel tilts can be solved.

The invention relates to an automatic centering control method for a hydraulic cylinder, which adopts a control system consisting of a displacement sensor, a proportional valve and a programmable controller, the displacement sensor detects the displacement value of a piston rod of the hydraulic cylinder in real time, and the proportional valve receives control information sent by the programmable controller and controls the piston rod of the hydraulic cylinder to move. The method is novel and practical, the centering motion synchronism of the hydraulic cylinder is high through closed-loop control, the displacement is accurate, steel plates with different widths can be centered intelligently and automatically, the centering precision is high, and the centering precision is high. And the phenomena of hydraulic cylinder damage and clamping steel plate deformation and scrapping are avoided, the centering work efficiency is high, and the service life is long.

The invention provides a hot rolling width necking compensation control method and system.The method comprises the steps that when the strip steel width within the preset length of the head of finished strip steel exceeds the preset target lower limit, the preset width is narrowed to be marked; and the head and tail necking compensation initial position, the compensation length and the compensation amount of the corresponding intermediate billet are calculated, so that the rough rolling last-pass vertical roll gap is compensated, and the head and tail width of the intermediate billet is kept within the preset target range. By calculating the head and tail necking compensation starting position, the compensation length and the compensation amount of the intermediate billet, finished strip steel width narrowing caused by the moment of steel biting of the winding drum can be accurately compensated, accurate compensation of the width narrowing position is achieved, the width size control accuracy is guaranteed, and the strip steel head width hit rate is increased.

The present application relates to the technical field of intelligent steel production application, especially to a strip tail section control method and device based on rolling force difference data.A strip tail section control method based on rolling force difference data includes: collecting field operation side data and transmission side data for division to obtain reference section data, full output section data and one-way output section data; calculating according to the reference section data to obtain a rolling force difference reference value; determining the roll gap leveling value direction according to the full output section data, and determining whether the roll gap leveling operation is issued according to the one-way output section data.The strip tail section is controlled.The present application is a high-efficiency and stable finishing strip tail section control method based on rolling force difference data.

The application discloses a control method for improving tail quality of thin-gauge high-strength steel, and the method comprises the following steps: calibrating parameters of a rough rolling mill and a finishing mill; adjusting the distance between the head tail of the intermediate billet in the rough rolling mill and the rolling center line, and setting the tail short stroke value of the entry side guide plate of the finishing mill; based on the calibrated rolling mill parameters, when the tail of the thin-gauge high-strength steel is rolled, the short stroke value is increased based on the set tail short stroke value of the entry side guide plate of the finishing mill, the parameters of the automatic opening of the entry side guide plate of the finishing mill are set, and the parameters of the roll gap of the finishing mill are set. The application can solve the local folding, one-side tail flinging and rolling failure caused by the inconsistent extension of the two sides of the strip steel due to the temperature, rolling pressure, abnormal plate shape adjustment and the like in the actual production process, and the production efficiency is improved.

The application provides a method for improving quality and efficiency and controlling tailing deviation of a rolling mill by using a flattening roller at the entrance of the rolling mill, wherein the flattening roller group at the entrance of the rolling mill comprises a fixed roller and one movable upper roller; the upper roller is a flattening roller for pressing the strip, and the pressing position of the upper roller depends on the position of a depth adjusting device platform; the position of the depth adjusting device platform is vertically adjusted by a motor and a transmission device connected to the motor; in the method, an encoder is installed at the motor, and a depth adjusting target value is automatically generated according to the thickness of the strip at the entrance to control the pressing position of the upper roller; and the application can optimize the rolling mill process.

This invention relates to a control method for simultaneous online coiling of two steel sections in hot continuous rolling, comprising the following steps: S1, constructing a head-tail tracking module and a simultaneous online buffer for the two steel sections; S2, the head-tail tracking module tracks the head-tail position data of each of the two rolled sections when they are simultaneously online, and sends the head-tail position data to the coiling computer; S3, the process machine receives the coiling machine function selection, and sends the actual control parameters to the simultaneous online buffer for the two steel sections according to the coiling machine function selection; the coiling computer sends the actual control parameters to the coiling machine according to the on-site strip logic. This solution solves the problem of flashing malfunction in hot strip inspection, enhances the stability of the system, thereby meeting the control requirements for online coiling of two steel sections, improving the coiling rhythm of the coiling machine, and thus improving the overall rolling rhythm of hot continuous rolling.

The invention discloses a control method for solving the problem of soft strip steel head coil loosening, and relates to the technical field of metallurgical steel rolling. According to the control method for solving the problem of head loosening of the soft strip steel, the coiling temperature gradient, the laminar cooling gradient and the coiling tension gradient are cooperatively controlled and optimized, and the problem of head loosening generally occurring after the soft strip steel is cooled is solved from the process technology level. A low-temperature coiling method is adopted in the head area, high-strength cooling operation is implemented in cooperation with a laminar cooling system, and the hardness of the head of the strip steel is greatly improved through the synergistic effect of the two. And meanwhile, a large-tension coiling control strategy is applied, so that the coiling compactness of the steel coil is practically ensured. The three gradient control means are matched with one another to form closed-loop regulation and control, so that the strip steel can still keep a good coiled state even after being cooled, and the overall quality of a steel coil is remarkably improved.

The application belongs to the technical field of hot continuous rolling finishing rolling, and particularly relates to a control method for improving tailing in hot continuous rolling finishing rolling, which comprises the following steps: after gradient heating treatment of a slab, rough rolling and finishing rolling are performed; in the gradient heating treatment, the head heating temperature of the slab is 1180 DEG C to 1200 DEG C, the intermediate part heating temperature is 10 DEG C to 15 DEG C higher than the head heating temperature, and the tail heating temperature is 10 DEG C to 15 DEG C higher than the intermediate part heating temperature. The control method for improving tailing in hot continuous rolling finishing rolling provided by the application adopts a gradient heating mode, so that when the slab enters the finishing rolling, the temperature difference between the head and the tail of the slab is small, the tail is easy to deform, and thus the tailing risk is reduced.

The present disclosure relates to a tail-end extrusion suppression device for a tandem rolling mill that rolls a rolled material by a series of N (N≥2) rolling stands. The i-th rolling stand (1≤i≤N) of the tandem rolling mill has an i-th roll bending device that presses the rolled material with a predetermined roll bending pressure. The tail-end extrusion suppression device continuously reduces the roll bending pressure of the (j+1)-th to N-th roll bending devices that are downstream of the j-th rolling stand from when the j-th rolling stand (1≤j≤N−1) is separated from the tail end of the rolled material until the N-th rolling stand is separated.

This invention relates to a method for reducing head warping in cold-rolled duplex steel, belonging to the field of hot-rolled strip steel production technology in the metallurgical industry. The technical solution is as follows: When rolling cold-rolled duplex steel, a cooling water delay program is initiated before the pinch rolls bite the steel; after the pinch rolls bite the steel, the cumulative contact length Lacc between the strip and the pinch rolls is obtained; simultaneously, the cumulative contact time Tacc between the strip and the pinch rolls is calculated, and the upper limit time Th of the pinch roll cooling water delay is calculated based on the coiling temperature setting. When either Lacc ≥ Lh or Tacc ≥ Th is satisfied, the pinch roll cooling water is turned on. The beneficial effects of this invention are: by dynamically controlling the opening and closing sequence of the coiler pinch roll cooling water, the strip head is placed in a relatively stable cooling environment, reducing interference from the cooling water, ensuring uniform temperature drop and phase transformation in the width direction of the strip head, reducing residual stress in the strip, maintaining a good strip shape at the strip head, and reducing the occurrence of head warping.

The utility model relates to the field of aluminum cold rolling mills, in particular to an automatic drifting device for an aluminum cold rolling mill and a control system.The automatic drifting device comprises a cold rolling assembly, folding and unfolding assemblies are arranged at the two ends of the cold rolling assembly, the cold rolling assembly comprises a machine frame, drifting assemblies are fixedly installed on the two sides of the machine frame, and each drifting assembly comprises an installation frame; three guide rollers are rotationally connected to the end, close to the machine frame, of the top of the mounting frame, deviation rectifying rings are fixedly mounted on the outer sides of the two ends of each guide roller, the diameter of the guide roller arranged in the middle is smaller than that of the other two guide rollers, and a damper is arranged between the guide roller in the middle and the mounting frame. Second telescopic rods are fixedly installed at the two ends of the guide roller in the middle, a lifting seat is fixedly installed at the output ends of the second telescopic rods, shaft seats are fixedly installed at the two ends of the bottom of the lifting seat, two clamping rollers are rotationally connected between the shaft seats, and the two clamping rollers are arranged at the tops of the three guide rollers. And waste materials are reduced.