148results about "Counter-pressure devices" patented technology

The invention provides a miniature flexible rolling mill, and belongs to the technical field of rolling mill equipment production and machining. Comprising a supporting unit, an execution unit, an angle compensation unit, a heavy transmission unit and a driving unit, the angle compensation unit is arranged on one side of the execution unit, the heavy transmission unit is arranged on one side of the angle compensation unit, and the driving unit is arranged on one side of the heavy transmission unit. The execution unit, the angle compensation unit, the heavy transmission unit and the driving unit are all arranged above the supporting unit. Efficient and stable rolling operation is achieved, the angle compensation unit and the heavy transmission unit ensure the flexibility and the transmission efficiency of the roller under the complex working condition, and a motor and a speed reducer in the driving unit provide powerful power support. In addition, the rolling effect is optimized through a roller and a supporting structure in the execution unit, the performance and reliability of the rolling mill are improved, and the maintenance cost is reduced.

The invention discloses a control method for solving the rigidity of a rolling mill in a hot rolling procedure, which belongs to the technical field of hot rolling and comprises the following steps: regularly detecting arc-shaped base plates on two sides, and replacing the arc-shaped base plates when the abrasion loss of the arc-shaped base plates on two sides exceeds a first abrasion threshold value or a pit greater than a first depth threshold value exists; the lower step pad is detected regularly, and when the abrasion loss of the lower step pad exceeds a second abrasion threshold value or a pit larger than a second depth threshold value exists, the lower step pad is replaced; the upper step pad is detected regularly, and when the abrasion loss of the upper step pad exceeds a third abrasion threshold value or a pit larger than a third depth threshold value exists, the upper step pad is replaced; and the sizes of the working roller housing window and the supporting roller housing window are regularly measured, the sizes of the working roller and the supporting roller bearing box are synchronously measured, and control is conducted according to the standard. The method aims at meeting the requirement for precise control over the rigidity of the rolling mill in the hot rolling process.

The present invention is provided with: a plurality of hydraulic cylinders including drive-side displacement cylinders (715C), (715D) and operation-side displacement cylinders (715A), (715B) configured so as to apply an axial force to an upper work roll (710); and a hydraulic circuit configured to supply hydraulic oil to the plurality of hydraulic cylinders so that the drive-side displacement cylinders (715C), (715D) and the operation-side displacement cylinders (715A), (715B) move in the axial direction, and maintain the position of the upper working roll (710) in the axial direction, the hydraulic circuit being configured to supply hydraulic oil to the plurality of hydraulic cylinders so that the drive-side displacement cylinders (715C), (715D) and the operation-side displacement cylinders (715A), (715B) move in the axial direction, after the position of the upper working roll (710) in the axial direction is maintained by the hydraulic circuit. When only one of the hydraulic cylinders of the drive-side displacement cylinders (715C, 715D) and the operation-side displacement cylinders (715A, 715B) applies an axial force to the upper work roll (710) due to an external force applied to the upper work roll (710), the other hydraulic cylinder moves in the opposite direction.

The invention discloses steel for a supporting roller and a preparation method of the steel, belongs to the technical field of preparation of steel for supporting rollers, and solves the problems that an existing preparation method of the steel for the supporting roller is long in production period, and high toughness of the interior cannot be ensured while high hardness of a roller surface is ensured. The preparation method comprises the following steps: thermally transferring a forged steel forge piece for the supporting roller into a heating furnace at 661-680 DEG C, and preserving heat; raising the temperature to 900-960 DEG C and keeping the temperature; air cooling: cooling the roller body to 400 + / -50 DEG C, and putting the roller body into a furnace with the temperature of 400 DEG C; reducing the furnace temperature to 300-350 DEG C and preserving heat; raising the temperature below a phase change point Ac1 and preserving heat; rapidly raising the temperature to 960-1000 DEG C and keeping the temperature; oil quenching: discharging oil when the surface temperature of the supporting roller reaches 200 + / -20 DEG C; keeping the temperature at 250-300 DEG C; raising the temperature to 550-630 DEG C and keeping the temperature; cooling to 400 + / -20 DEG C; and continuously cooling to 200 DEG C or below. The method is simple, and the prepared steel for the supporting roller can meet the technical requirements.

A rolling mill stand for rolling a metallic product (P′) that includes, inter alia: first and second movable rails arranged to allow unimpeded movement of work roll chocks of upper and lower work rolls when in an idle position during rolling operations, and replacement of the upper and lower work rolls when in a service position. Methods are provided for moving the first and second movable rails between the idle position and the service position in order to replace the upper and lower work rolls.

A rolling mill includes three or more rolling rolls aligned along a circumferential direction and arranged so each rotary shaft is skewed with respect to a pass line of a material to be rolled, wherein the material to be rolled made of a pipe or bar material passes between the rolling rolls while being rotated to undergo diameter reducing rolling. At least one rolling roll selected from the three or more rolling rolls is smaller in roll diameter than at least one other rolling roll. When at least one rolling roll having a relatively maximum roll diameter defined as a maximum diameter rolling roll and at least one rolling roll smaller in roll diameter than the maximum is defined as a small diameter rolling roll, the small diameter rolling roll has a roll diameter equal to or less than 90% of the roll diameter of the maximum diameter rolling roll.

To provide an electrode rolling device capable of reducing variation in thickness of an electrode sheet depending on the position in a width direction.SOLUTION: An electrode rolling device acquires the thickness Tc of a central portion 1C in a width direction, the thickness Twe of an end portion 1WE on a first side, the thickness Tde of an end portion 1DE on a second side, the thickness Twc of a first intermediate portion 1WC set between the central portion 1C and the end portion 1WE on the first side, and the thickness Tdc of a second intermediate portion 1DC set between the central portion 1C and the end portion 1DE on the second side for an electrode sheet 1. The electrode rolling device acquires the deviation ΔTwe between the thickness Tc and the thickness Twe, and the deviation ΔTwc between the thickness Tc and the thickness Twc, and also acquires the deviation ΔTde between the thickness Tc and the thickness Tde, and the deviation ΔTdc between the thickness Tc and the thickness Tdc, and performs control so as to reduce the larger one of the deviation ΔTwe and the deviation ΔTwc and the larger one of the deviation ΔTde and the deviation ΔTdc.SELECTED DRAWING: Figure 6

The utility model discloses a pole piece rolling mill which comprises two bases which are oppositely arranged front and back, an upper roller, a lower roller, an upper roller driving mechanism and a lower roller driving mechanism, the upper roller and the lower roller are oppositely arranged up and down, and a gap is formed between the roller surface of the upper roller and the roller surface of the lower roller. The two ends of the upper roller are rotatably arranged on two upper supports respectively, the two upper supports are movably arranged in the two bases respectively, and the two ends of the lower roller are rotatably arranged on two lower supports respectively. The two lower supports are movably arranged in the two bases correspondingly and located below the two upper supports correspondingly. The device further comprises two upper supporting rollers arranged in a bilateral symmetry mode, two lower supporting rollers arranged in a bilateral symmetry mode, an upper gap adjusting driving mechanism and a lower gap adjusting driving mechanism. According to the utility model, the quality of the pole piece is improved, meanwhile, the device can be suitable for thinning dry-method diaphragms with different thicknesses and sizes, the application range is wide, and the use requirements are met.

The invention discloses a six-roller copper foil rolling mill press roll rolling reduction accurate control device which comprises a rack, a press roll and a supporting roll are rotationally arranged on the rack, the press roll is located above the supporting roll, two upper balance rolls are symmetrically arranged on the press roll in a front-back mode, and the two upper balance rolls are arranged along the rack in an up-down sliding mode. Two lower balance rollers are arranged below the supporting roller in a front-back symmetry mode and tangent to the supporting roller, an adjusting mechanism is arranged between a rotating shaft of the pressing roller and a rotating shaft of the supporting roller and used for adjusting the distance between the pressing roller and the supporting roller, and a linkage mechanism is arranged between the two upper balance rollers and the rotating shaft of the pressing roller and used for adjusting the distance between the pressing roller and the supporting roller. And the linkage mechanism is used for adjusting the two upper balance rollers to slide along the rack. The problem that in the prior art, when a compression roller of a copper foil rolling mill rolls a copper foil strip, the copper foil strip is directly snapped or cracks occur is solved.

The invention discloses uniform-pressure silicon steel cold rolling equipment, and relates to the field of silicon steel cold rolling, the uniform-pressure silicon steel cold rolling equipment comprises a linearly through rack, two working rollers are distributed in the rack in parallel up and down, a gap for conducting silicon steel is formed between the two working rollers, two supporting rollers are symmetrically arranged on the far sides of the two working rollers, and the two supporting rollers are horizontally distributed at intervals; two parallel contact lines are arranged between the two supporting rollers and the working roller, symmetrical abutting force is applied to the working roller through the positions of the two contact lines, so that the working roller is positioned, it is guaranteed that the working roller has high rigidity, and the service life of the working roller is prolonged. And position deviation or self-deformation of the working roll is avoided, uniform pressure of the working roll is ensured, and the cold rolling quality of silicon steel is improved.

The invention discloses a hollow roller sleeve and a preparation method thereof, belongs to the technical field of preparation of hollow roller sleeves, and solves the problems that the high hardness of a roller surface cannot be ensured and the interior has relatively high hardness and toughness cannot be ensured in an existing preparation method of the hollow roller sleeve. The preparation method comprises the following steps: integrally tempering the hollow roller sleeve; the hollow roller sleeve is integrally preheated at the temperature of 300-350 DEG C; the hollow roller sleeve is transferred into a differential temperature furnace, the furnace temperature is rapidly increased to 1030-1080 DEG C, and the heating rate is larger than 800 DEG C / h; heat preservation is conducted at the temperature of 1030-1080 DEG C; and the furnace temperature is reduced to 950-1000 DEG C, and then tempering treatment is carried out after spray cooling is carried out on the surface of the roller body. The hollow roller sleeve prepared through the method is high in roller surface hardness, high in strength and good in wear resistance, and the inner wall of the hollow roller sleeve has certain hardness and strength and is excellent in toughness.

The invention belongs to the technical field of cold-rolled strip steel production control in the metallurgical industry, and particularly relates to an electromagnetic induction heating uniform bulging twenty-high rolling mill backing roller which comprises a mandrel and a plurality of supporting devices, the supporting devices are evenly arranged in the axial direction of the mandrel, and the supporting devices are arranged on the mandrel. An electromagnetic regulation and control assembly is arranged between every two adjacent supporting devices, screw-down gears are installed at the two ends of the core shaft, positioning rings are installed between the screw-down gears and the adjacent supporting devices, a first through hole is formed in the core shaft, and a plurality of second through holes corresponding to the electromagnetic regulation and control assemblies one to one are formed in the core shaft. According to the production line, a hydraulic device is replaced with electromagnetic induction, the problem that strip steel is polluted due to hydraulic oil leakage is solved, and the safety and the environmental protection property of the production line are improved.

A processing roller for a rolling mill for thinning a sheet of an alkali metal or its alloy into a film is disclosed. The processing roller has a cylindrical central portion defining a central axis and having an outer surface defining a thinning surface, and first and second frusto-conical portions extending from first and second ends of the central portion. When the central axis is straight, the angle between the outer surface of the central portion and the outer surfaces of each of the first and second frusto-conical portions is less than 0.05 degrees. The width of the central portion is greater than the width of each of the first and second frusto-conical portions. The width of the central portion is less than the sum of the widths of the first and second portions. A rolling mill having two such processing rollers is also disclosed.

A roll press rolls each including an upper roll and a lower roll that are supported by a main bearing at both ends and rotate at a predetermined speed, upper and lower bending bearings that are disposed outside each of the main bearings and correct deflection of the press rolls by receiving a bending load, an upper reverse operation bending mechanism provided in the upper roll that operates with hydraulic oil, a lower reverse operation bending mechanism provided in the lower roll, and two upper reverse operation bending mechanisms and two lower reverse operation bending mechanisms being installed in the upper and lower bending bearings, respectively. Deflection occurring in the upper roll and the lower roll is corrected by causing the upper reverse operation bending mechanism or the lower reverse operation bending mechanism to generate downward power or upward power, respectively.

The invention relates to the technical field of rolling, in particular to a metal plate rolling device and a rolling process thereof.The metal plate rolling device comprises a base, two control boxes are fixedly connected to the top of the base, a plurality of rolling assemblies are arranged between the two control boxes, and each rolling assembly comprises two rolling rollers which are sequentially arranged in the vertical direction; the two ends of the rolling roller are fixedly connected with first connecting shafts correspondingly, the first connecting shafts are sleeved with lifting bases in a rotating mode, a plurality of first avoiding holes are formed in the inner walls of the two control boxes correspondingly, and the two ends of each first connecting shaft penetrate through the corresponding first avoiding holes correspondingly. A movable shaft is arranged between every two adjacent first connecting shafts, the first connecting shafts are rotationally sleeved with connecting plates, and every two adjacent connecting plates are rotationally connected with the corresponding movable shaft. And the distance between the two rolling rollers on each rolling assembly can be conveniently adjusted, the adjusting efficiency is improved, the downtime is shortened, and application and popularization are facilitated.

This invention relates to a method for producing support roll steel, belonging to the field of metallurgical industry, and solves the problems of high cost and severe shrinkage porosity in existing support roll steel. The method for producing support roll steel includes: smelting, deoxidizing, desulfurizing, and refining the support roll steel ingot raw material, adjusting the alloy composition to obtain a first portion of support roll steel molten steel, tapping the steel, vacuum casting, and solidifying to obtain a solidified billet shell and liquid steel inside the billet shell; smelting, deoxidizing, desulfurizing, and refining the support roll steel ingot raw material, adjusting the alloy composition to obtain a second portion of support roll steel molten steel, tapping the steel, mixing the second portion of support roll steel molten steel with the liquid steel inside the billet shell within the solidified billet shell of the first portion of support roll steel, vacuum casting, solidifying to obtain a complete support roll steel ingot, demolding, removing the sprue, forging, removing the riser, heat treating, and machining to obtain the support roll steel; the composition of the first portion of support roll steel and the second portion of support roll steel molten steel differs.

The invention discloses an eccentricity compensation method, device and system for a supporting roller of a cold rolling mill, and the method comprises the steps: obtaining an inlet thickness through measurement, carrying out the delayed output, and determining an outlet thickness calculation value according to the inlet thickness outputted in a delayed manner; obtaining an outlet thickness measurement value through measurement, and determining a calculation thickness error according to the outlet thickness measurement value and the outlet thickness calculation value; a back-up roll rotation double-frequency component and a back-up roll rotation double-frequency component in the thickness error are filtered and calculated, and a back-up roll eccentric main body signal is obtained; based on the backup roller eccentric main body signal, reconstructing the backup roller eccentric main body signal through a recursive least square method; performing phase deviation on the reconstructed backup roller eccentric main body signal; determining a roll gap compensation value according to the backup roll eccentric main body signal after phase deviation; and controlling the roll gap according to the roll gap compensation value. By means of the method, accurate compensation of the eccentricity of the supporting roller is achieved, and the quality of rolled products is improved.

A rolling machine (1) comprises: a work roll (10) that contacts a rolling material (K); a backup roll (20) that supports the work roll (10); a housing (30) that houses the work roll (10) and the backup roll (20); a first bearing (40) that supports the work roll (10) with respect to the housing (30); and a second bearing (50) that supports the backup roll (20) with respect to the housing (30).

A roll stand for rolling a metallic product and having two work-rolls supported in the roll stand by respective work-roll chocks. An axial displacement arrangement is provided with which the work-rolls can be displaced in direction of their longitudinal axes, and at least one work-roll locking arrangement is provided with which the work-roll chocks can be locked and unlocked in the roll stand. A rotation prevention arrangement is provided with which the axial displacement arrangement can be prevented from rotation about longitudinal axes of the work-roll. A bending arrangement is provided which includes a bending block and with which a bending torque can be applied to the work-rolls. In order to achieve a simpler design of the assembly and improved lubrication possibilities for the component to be lubricated, the rotation prevention arrangement and the axial displacement arrangement are fixedly connected with the bending block.

The utility model relates to the technical field of supporting rollers, and discloses a forged steel supporting roller convenient to disassemble and maintain, which comprises a base, the inner wall of the base is connected with a sliding mounting plate in a sliding manner, the inner wall of the base is fixedly provided with a guide rail, the outer wall of the base is fixedly provided with a motor I, and the motor I is fixedly provided with a motor II. A first double-end lead screw is fixedly mounted on an output shaft of the first motor, a supporting roller body is movably connected to the inner wall of the sliding mounting plate, a threaded rod is rotatably connected to the inner wall of the sliding mounting plate, and a limiting rod is slidably connected to the inner wall of the sliding mounting plate. A threaded rod is rotated to drive a threaded sleeve to move upwards, then the threaded sleeve drives a pressing piece at the bottom to move upwards, at the moment, the fixing relation of a supporting roller body disappears, a first motor is started to drive a first double-end lead screw to rotate, the first double-end lead screw drives two sliding mounting plates to move towards the two sides, and then the supporting roller body is fixed. The sliding mounting plate is separated from the supporting roller body, and the supporting roller body can be taken out at the moment.

The invention provides a D-shaped steel pipe rolling device which comprises a rolling frame, a plurality of driving assemblies and an auxiliary supporting assembly, a plurality of sets of rollers are arranged in the rolling frame, and each set of rollers comprises an upper roller and a lower roller. The supporting columns on the upper roller and the lower roller can be supported in an auxiliary mode through the auxiliary supporting assemblies, annular grooves in the surfaces of the supporting columns are supported, namely, the supporting columns are supported in the radial direction, the supporting columns are also supported in the axial direction, and therefore the top pressure, borne by the upper roller and the lower roller, of a steel pipe body is resisted; and the effect of the jacking force on the connecting points between the supporting columns and the rolling frame is reduced, then loss of the connecting positions between the rollers and the rolling frame is reduced, and the loss speed of the connecting positions between the rollers and the rolling frame can be reduced.

The invention relates to the technical field of rolling mill supporting rollers, and particularly provides a rolling mill supporting roller inclination state processing method and system, a terminal and a storage medium. Detecting a second distance from the transmission side of the hydraulic cylinder to the upper plane of the back-up roll bearing seat by using a second laser range finder; the difference value between the first distance and the second distance is calculated, and if the absolute value of the difference value reaches a preset error threshold value, an adjusting task is generated; and the adjusting task is issued to a PID controller, so that the PID controller generates adjusting signals for speed adjusting valves on the two sides of the supporting roller based on the adjusting task. Detection of the inclination state of the supporting roller of the rolling mill is achieved, error adjustment is carried out based on the detection result, and the inclination state is eliminated.

The utility model discloses a tool for replacing a hot rolled plate pressure head, which comprises two groups of racks, two groups of guide rails, a pressure head and a tool, the guide rails are arranged on the two groups of racks, the pressure head is arranged on the lower parts of the racks, the tool is arranged on the guide rails in a sliding manner, the tool comprises rollers and a frame, and the rollers are arranged on the frame. A plurality of groups of rollers are symmetrically arranged, the rollers are arranged on the guide rail in a sliding manner, and the frame is arranged on the roller outer frame. The utility model relates to the field of hot-rolled plate pressure head using and replacing tool design, in particular to a tool for replacing a hot-rolled plate pressure head.

The utility model relates to the technical field of supporting rollers, and discloses a sectional flexible supporting roller mechanical property regulating structure which comprises an independent supporting roller, the inner side of the independent supporting roller is slidably connected with a shaft center, the inner side of the shaft center is provided with a pressure regulating mechanism, and the outer side of the independent supporting roller is provided with a limiting mechanism. Flexible sheets are arranged on the inner sides of the independent supporting rollers, the outer sides of the flexible sheets are attached to the inner sides of the independent supporting rollers, the limiting mechanisms comprise limiting plates, the limiting plates are fixedly connected to the outer sides of the independent supporting rollers, bidirectional threaded rods are rotationally connected to the inner sides of the limiting plates, and anti-skid wheels are fixedly connected to the middles of the peripheries of the bidirectional threaded rods. The anti-skid wheels drive the bidirectional threaded rods to rotate, so that the bidirectional threaded rods drive the movable plates to move through the threaded plates, the movable plates can drive the insertion rods to be inserted into the inner sides of the axes, the positions of the axes are limited, and when external equipment drives the axes, the axes can drive the independent supporting rollers to rotate through the insertion rods.

The invention relates to the technical field of profile rolling, and particularly discloses a flat-rolling ultrathin aluminum alloy profile rolling device which comprises rolling racks, and a profile pretreatment unit is fixedly arranged between the front faces of the two rolling racks through bolts; sectional material rolling units are symmetrically arranged on the upper portion and the lower portion between the two rolling racks, and auxiliary supporting assemblies are arranged on the two sectional material rolling units. Through the composite structure design of the working roller, the rolling quality is improved from three aspects: the flat roller and the convexity roller are adapted to the thickness control requirements of profiles with different widths; the nano ceramic coating strengthens the wear resistance of the roller surface; by means of the micro-nano rib and pit structure, on one hand, the contact area of the roller and the profile is reduced, the friction coefficient is reduced, drawing marks or wrinkles of the profile are avoided, and on the other hand, the pits are used for storing lubricating oil and containing aluminum skimmings to protect the surface of the profile. And meanwhile, the servo electric cylinder is matched with the adjusting frame, so that the distance between the rollers can be accurately adjusted to adapt to rolling of profiles with different thicknesses, and the rolling precision is guaranteed.

To ameliorate at least some of inconveniences present in the prior art.SOLUTION: Disclosed is a working roller for a rolling mill for forming a film by thinning a sheet of alkali metal or alloy thereof. The working roller has: a cylindrical center portion defining a central axis, the center portion having an outer surface defining a lamination surface; and first and second frustoconical portions extending from first and second ends of the center portion. When the central axis is straight, an angle between the outer surface of the center portion and an outer surface of each of the first and second frustoconical portions is less than 0.05 degrees. A width of the center portion is greater than a width of each of the first and second frustoconical portions. The width of the center portion is less than a sum of the widths of the first and second portions. A rolling mill having two such working rollers is also disclosed.SELECTED DRAWING: Figure 5

The invention provides a forging method for improving the steel ingot utilization rate of a supporting roller and the supporting roller, and relates to the technical field of forge piece forging, the forging method for improving the steel ingot utilization rate of the supporting roller comprises the following steps: forging for a first heating number: after a steel ingot blank is subjected to heat preservation for a first preset time at a first preset temperature, carrying out first overall drawing-out on the steel ingot blank; the steel ingot blank is subjected to heat preservation at a second preset temperature for a second preset duration, then the steel ingot blank is subjected to upsetting through the cooperative use of an upsetting cover plate with a blind hole and a bottoming type upsetting leakage disc, and then the upset steel ingot blank is subjected to second overall drawing-out; and the steel ingot blank is subjected to overall drawing-out and blanking after being subjected to heat preservation at the third preset temperature for a third preset duration. Compared with the prior art, the forging method for improving the utilization rate of the supporting roll steel ingot has the advantages that waste of blanks is reduced in the forging process of the supporting roll forge piece, and the utilization rate of the steel ingot is improved.

A backup roll device for a multi-roll mill, the backup roll device comprising a shaft, a support body that supports the shaft, a backup roll that is supported on the shaft, and a detector that detects the load applied to the backup roll. The backup roll includes an inner ring that is fixed to the shaft, an outer ring that is arranged on the outside of the inner ring in the radial direction, and a plurality of rolling bodies that are arranged between the inner ring and the outer ring in the radial direction. The detector is attached to the inner ring, and a wiring passage through which a cable for the detector is passed is formed in the shaft along the axial direction of the shaft.

To provide laminated films of an alkali metal or an alloy thereof, and an apparatus for making the same.SOLUTION: A working roller for a rolling mill for laminating a sheet of an alkali metal or alloy thereof to a film is disclosed. The working roller has: a cylindrical center portion defining a central axis, and having an outer surface defining a lamination surface; and first and second frustoconical portions extending from first and second ends of the center portion, respectively. When the central axis is straight, an angle between the outer surface of the center portion and an outer surface of each of the first and second frustoconical portions is less than 0.05°. A width of the center portion is greater than a width of each of the first and second frustoconical portions. The width of the center portion is less than the sum of the widths of the first and second portions. A rolling mill having two such working rollers is also disclosed. A laminated sheet of an alkali metal or alloy thereof obtained by the working roller of the present technology is also disclosed.SELECTED DRAWING: Figure 2

The embodiment of the utility model provides a rolling mill and a battery production system. The rolling mill comprises a measuring mechanism and a roller mechanism. The roller mechanism comprises two supporting rollers and two working rollers, the two supporting rollers are arranged at intervals in the first direction, the two working rollers are arranged between the two supporting rollers in the first direction and arranged side by side in the first direction, and a gap allowing a plate to penetrate through is formed between the two working rollers. The two supporting rollers are used for abutting against the adjacent working rollers correspondingly, at least one of the two supporting rollers is provided with a flow channel structure allowing heat exchange media to flow, a liquid inlet flow path and a liquid outlet flow path, the liquid inlet flow path and the liquid outlet flow path communicate with the flow channel structure, the flow channel structure is located in the supporting rollers, and the area, corresponding to the flow channel structure, of the working rollers is a cooled area. The measuring mechanism is used for measuring the thickness of the plate pressed by the cooled area. The quality of rolled products can be improved.