411 results about "Work roll" patented technology

The invention discloses a TC4 titanium alloy preformed blank, a TC4 titanium alloy plate with a full lamellar structure and a preparation method of the TC4 titanium alloy plate, and belongs to the technical field of titanium alloy machining. According to the method, TC4 alloy powder prepared through hydrogenation dehydrogenation and plasma rotating electrode atomization serves as a raw material, and a high-density binary structure preformed blank is prepared through a three-step type hot isostatic pressing technology; a pure titanium sheath is adopted for packaging, two-heating-number rolling is conducted through the sheath, and the plate shape is optimized through convexity design of a working roller and dynamic roller bending force control; and after rolling, solid solution and two-stage aging composite heat treatment are combined, the head and the tail are cut off, and the TC4 titanium alloy plate is obtained. The problem of tissue segregation of a traditional cast ingot is solved through powder metallurgy, the obdurability is improved, and the anisotropy is reduced; and meanwhile, the raw material cost is reduced, the production period is shortened, the yield is increased, the surface quality is improved, and a reliable scheme is provided for green and efficient preparation of high-performance titanium alloy plates in the aerospace field.

The invention relates to the technical field of laser cladding repair, and provides a positioning and clamping system and method for repairing the surface of a large working roll of a steel mill based on laser cladding, a three-field coupling prediction model of a temperature field, a stress field and a displacement field is established, and a partial least squares regression algorithm is combined with a Kalman filter to realize multi-step prospective prediction. According to the predicted thermal deformation, self-adaptive compensation control is implemented through a three-layer cascade compensation mechanism composed of a hydraulic drive, a piezoelectric ceramic driver and a laser head adjusting mechanism. The system adopts a time domain, frequency domain and time-frequency domain joint analysis method to extract vibration characteristics, vibration types are classified and identified through a support vector machine, and an active-passive hybrid suppression strategy is adopted for different vibration sources. High-precision positioning and stable clamping of the large working roller in the laser cladding repairing process are achieved, and the thickness uniformity and the surface quality of a cladding layer are remarkably improved.

Disclosed in the present invention is an automatic disassembly and assembly device for work roll chocks, comprising a carriage base, wherein carriage linear guide rails are arranged on the upper surface of the carriage base, a roll transverse transfer vehicle is slidingly arranged on the carriage linear guide rails, work rolls are placed on the roll transverse transfer vehicle, a work roll chock is mounted at either end of each work roll, a carriage driving mechanism used for driving the roll transverse transfer vehicle to move along the carriage linear guide rails is mounted on the carriage base, and automatic disassembly and assembly structures used for disassembling and assembling the work roll chocks are symmetrically arranged on two sides of the carriage base. The roll transverse transfer vehicle is driven by the carriage driving mechanism to move on the carriage base and transfers the work rolls to the automatic disassembly and assembly structures, and the work roll chocks are disassembled and assembled by means of the automatic disassembly and assembly structures, which replaces conventional manual disassembly and assembly work, reduces the labor intensity of workers, greatly improves the efficiency of disassembling and assembling the chocks, and reduces the workload; additionally, the potential installation danger in the manual disassembly and assembly process is eliminated, and the production safety is guaranteed.

The invention discloses equipment and a method for customizing front and back morphology structures of an invar alloy ultra-thin strip, and belongs to the field of invar alloy ultra-thin strip processing. The equipment comprises a working roller with differentiated surface topography, a first middle roller with a polyurethane-based organic material coating layer, an ultrasonic clamping device, an integrated tension weighting control system and a central control unit. By configuring different surface roughness of the upper working roll and the lower working roll and combining stable transverse pressure stress and axial ultrasonic vibration provided by the first middle roll, asymmetric plastic flow and shape copying of metal on the front face and the back face of the strip are achieved. In the rolling process, plate shape defects caused by friction differences are dynamically compensated by cooperatively adjusting the roll shifting amount of the first intermediate roll and the convexity of the backing roll saddle, finally, customized production of the 4J36 invar alloy ultra-thin strip with the thickness of 15 microns is achieved, the A face and the B face of the strip have different surface roughness, and the surface roughness of the strip is greatly improved. And the specific requirement of a fine metal mask plate pore-forming process on the surface state of the base material is met.

The invention discloses a method for improving the same-plate difference of non-oriented silicon steel through multi-process coordinated regulation and control. The method comprises the following steps: cooperatively controlling the following key process parameters: 1) hot continuous rolling process control: plate shape target control; width control; configuring and grinding a roller; a roller changing period; (2) five-rack acid continuous rolling procedure control: roller configuration; grinding the roller; and roll bending force control is conducted, specifically, the roll bending force of working rolls of all the racks is set to be 320 + / -20 kN for the rack S1, 330 + / -20 kN for the rack S2, 330 + / -20 kN for the rack S3, 330 + / -20 kN for the rack S4 and 330 + / -20 kN for the rack S5, an automatic mode is adopted, and dynamic adjustment is conducted according to feedback of a real-time strip shape instrument. According to the method, key process parameters in the whole hot rolling and cold rolling process are accurately controlled, the synergistic effect is formed, the transverse thickness uniformity of the strip steel is fundamentally improved, and therefore the high-quality non-oriented silicon steel product with the extremely small same-plate difference is obtained.

A splash-proof mechanism of an upper working roller for aluminum coil cold rolling comprises the upper working roller rotationally supported on a cold rolling rack, the two ends of the upper working roller are cone sections, the small-diameter ends of the cone sections face the cold rolling rack, two connecting plates extending in an arc shape are fixedly arranged on the cold rolling rack and correspond to the two ends of the upper working roller respectively, and the two ends of the upper working roller are connected with the cone sections. An oil baffle is fixedly arranged on each connecting plate and is bent in an arc shape, the circle where the oil baffle is located is concentric with the circle where the upper working roller is located, one side of the oil baffle bent in the arc shape is flush with the inner wall of the corresponding side of the cold rolling rack, and the other side of the oil baffle bent in the arc shape extends to the large-diameter end of the cone section at the corresponding end of the upper working roller; the starting end of the oil baffle is located on the discharging side of the upper working roller and corresponds to the bottom of the upper working roller, and the stopping end of the oil baffle extends in the rotating direction of the upper working roller and corresponds to the top of the upper working roller. The cold rolling oil recycling device is simple in structure, low in modification cost, capable of effectively preventing cold rolling oil from splashing out of cold rolling equipment, beneficial to cold rolling oil recycling and capable of avoiding pollution.

The utility model relates to the technical field of rolling mills, and discloses four-roller rolling mill equipment with a roller surface lubricating device, which comprises a transverse plate, two vertical plates are symmetrically and fixedly connected to the upper surface of the transverse plate, and two supporting rollers are rotatably connected between the two vertical plates in a penetrating manner from top to bottom. Two working rollers are rotatably connected between the two vertical plates and the two supporting rollers in a penetrating mode from top to bottom, and a damping mechanism is arranged outside the transverse plate. A lubricating mechanism is arranged in front of the two vertical plates on the upper surface of the transverse plate; by arranging the damping mechanism, looseness and fatigue damage of parts caused by vibration are remarkably reduced, so that the service life of equipment is prolonged, the lubricating mechanism realizes efficient and uniform coating on the surface of the working roller, rolling friction force is reduced, roller surface abrasion and workpiece surface scratches are reduced, and the service life of the equipment is prolonged. And the roller surface temperature is effectively controlled through the cooling effect of the lubricating oil, and roller surface damage caused by local overheating is avoided.

According to the off-line brush roll adjusting device and method, an upper working roll assembly and a lower working roll assembly are placed in a containing groove of an overturning frame body, then the overturning frame body and the working roll assemblies are driven by a driving device to rotate to adjust the angle, and a working roll is pressed against the position, close to a brush roll, of a working roll bearing seat under the action of gravity; and then the brush roll is driven by the hydraulic motor of the brush roll, the gap is eliminated, the brush roll does not need to be adjusted on line, the operation is simple, the adjusting time is shortened, the working efficiency is improved, and the labor burden of workers is greatly relieved. According to the invention, the real state of the working roll and the brush roll during working can be simulated in an off-line manner. When the overturning oil cylinder extends out, the overturning frame body is horizontal, and at the moment, the working roll device can be hoisted. After hoisting is completed, the overturning oil cylinder retracts, the working roller device is overturned by 20 degrees on the overturning frame, the working roller is completely attached to the bearing seat under the action of gravity, the bearing backlash is eliminated, and the real working condition is simulated.

The application discloses a kind of work roll box grinding full-automatic overturning and supporting system, belong to machine tool technical field, comprising: support seat first base is set on common base, sliding component is set on first base, support seat second base and sliding component sliding connection, second base drive component is set on support seat first base, bearing box support is set on support seat second base, support seat detection component is set on support seat first base;Lifting assembly is set on positioning support, roll support is set on lifting assembly, soft landing detection component is set on positioning support;Guide rail shell is set on common base, box turning drive component is set on guide rail shell, box turning support is set on arc-shaped overturning gear, box turning detection component is set on guide rail shell.The application can avoid the various interference that occurs during work roll box grinding action process overturning roll box.

This invention provides a fully automatic cold rolling equipment for producing copper strip, belonging to the technical field of fully automatic cold rolling equipment for producing copper strip. It includes: a main body, mounting plates, mounting frames, a cleaner, a waste trough, and an electric cylinder. Mounting plates are respectively installed on the upper and lower front sides of the main body. Mounting frames are installed on the inner sides of each mounting plate. Electric cylinders are installed on the front sides of each mounting frame. A cleaner is installed on the rear side of each mounting frame. The cleaner consists of a felt layer and a fiber cloth layer. A waste trough is installed on the inner side of each mounting frame. The cleaner, driven by the electric cylinder, presses against the roller surface from the side of the work roll end. The felt layer scrapes off large copper shavings, the fiber cloth layer cleans residual oil, and the waste trough collects the waste material. This system is interlocked with the main drive motor, achieving automatic online cleaning without stopping the machine. This effectively improves the surface quality of the copper strip and production efficiency. The structure is compact and easy to install and modify on existing equipment.

The invention relates to a working roll for rolling metal products, in particular for rolling metal strips, comprising: a metal matrix; and a wear-resistant protective layer at least partially arranged on the base body, the wear-resistant protective layer being a thermally sprayed protective layer; wherein the particle size of the wear-resistant protective layer is less than or equal to 50 m, preferably less than or equal to 45 m, particularly preferably less than or equal to 30 m or less than or equal to 20 m.

The utility model relates to the technical field of cold roll heat treatment, in particular to a novel cold-rolled working roll heat treatment device which comprises a tempering furnace, a furnace door, a heat exchanger and a heat exchanger, a mounting structure is mounted on the inner side of the tempering furnace, the mounting structure comprises a fixing column, the fixing column is fixedly mounted on the inner wall of the tempering furnace, a sliding block is slidably mounted on the fixing column, and a positioning groove is formed in the top surface of the sliding block; a collecting structure is installed on the front face of the tempering furnace and comprises a fixing frame, and the fixing frame is fixedly installed at the lower end of the front face of the tempering furnace. The positioning groove is formed in the top face of the sliding block, during use, a cold roller can be vertically placed into the positioning groove, convenient installation of the cold roller on the sliding block is achieved, the positioning groove is of a V-shaped structure, the installation requirements of the cold rollers with different diameters can be met, meanwhile, the cold roller can be prevented from shaking on the sliding block, and the service life of the cold roller is prolonged. And the use experience of the device is improved.

The utility model relates to the technical field of bearing box discloses a kind of finishing mill work roll bearing box end cover, including the end cover body of being movably installed on bearing box ontology, the end cover body is installed on bearing box ontology by bolt ontology, the side of the end cover body close to bearing box ontology is provided with alignment component and sealing rubber ring, the alignment component is evenly set on end cover body;In the utility model, by setting alignment component, in the process of end cover body installation to the side of bearing box ontology, it is convenient for staff to temporarily fix end cover body in the side of bearing box ontology, avoid needing staff to manually fix end cover body, simultaneously avoid the end cover body deviation leads to needing to adjust position again, speed up the efficiency of installation.

The invention belongs to the field of hot continuous rolling strip steel production processes, and particularly relates to a process lubricating method for a hot continuous rolling unit in the rolling process, which comprises the following steps of: determining a process lubricating oil proportion of each rack; collecting a head and tail cutting signal of a flying shear and an on-load signal of a rolling mill, and preparing an oil-water mixture based on the proportion of process lubricating oil; after an on-load signal of the F1 is triggered, an oil-water mixture is sprayed to a supporting roller of the F1, and the rotating supporting roller transmits the oil-water mixture to a working roller in contact with the supporting roller; after the on-load signals of F2, F3 and F4 are triggered, delaying for first preset time, and spraying an oil-water mixture onto a working roller of a rack; after an on-load signal of the F5 is triggered, delaying a second preset time and spraying an oil-water mixture onto a working roller of the F5; and when a tail cutting signal of the flying shear is triggered, the hot rolling oil valve is closed, and the oil-water mixture injection valve is closed after a third preset time is delayed after the tail cutting signal is triggered. The problem of slipping of the first rolling mill is completely eradicated.

The application discloses a kind of strip steel's flattening method and device, the flattening method is by obtaining the strip steel flattening sequence comprising multiple flattening periods, determine whether the first strip steel roughness of current period is greater than the second strip steel roughness of next period, when the first strip steel roughness is greater than the second strip steel roughness, control current flattening strip steel of current period to polish the flattening work roll, so that the flattening work roll reaches the target roughness of next period, when the strip steel flattening of next period is implemented, based on the flattening work roll reaching target roughness, the strip steel to be flattened of next period is flattened and handled, since the flattening work roll is polished to the roughness required by control strip steel during flattening process, so that there is no need to change roll when flattening is implemented in next period, the roll changing frequency of flattening work roll on the flattening machine is reduced, and then the flattening efficiency of strip steel is improved.

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 discloses a temper mill and finishing mill system for a pickling galvanizing unit, and relates to the technical field of strip steel leveling in steel production equipment, the temper mill and finishing mill system comprises an uncoiler, a pickling section, a temper mill, a galvanizing section, a finishing mill and a coiler which are arranged along the direction of a production line, the temper mill is a four-roller temper mill, the temper mill adopts a dry-type leveling mode, and the recoiling machine is a four-roller temper mill. A working roller wiper and a supporting roller wiper are arranged, and a suction device is arranged to suck away dust generated in the leveling process; and the finishing machine is provided with a wet finishing spraying beam and a high-pressure water cleaning trolley, so that the real-time lubrication and cleaning of strip steel and rollers can be realized, and the quality of a galvanized sheet finished product is effectively ensured.

The utility model discloses a kind of eighteen roller thrust wheel state detection devices, belong to thrust wheel technical field, comprising: driven wheel, driven wheel and the thrust wheel rolling connection in the thrust structure for the axial limiting of work roll in eighteen roll mill;Vibration probe, vibration probe is connected with thrust structure, for detecting the vibration amplitude of thrust structure;And hall component, hall component includes: hall probe and magnet, magnet is located on the circumferential side wall of driven wheel, hall probe is spaced apart from driven wheel, and hall probe is used to detect the rotation from thrust wheel.In the case where not damaging thrust wheel, the real-time monitoring of thrust wheel state is realized, the problem of various benefit loss caused by rolling mill thrust wear is solved, the rolling mill thrust wear and ablation are prevented, personnel casualties and property losses caused by safety accidents are avoided due to equipment failure, the equipment is maintained in time, the product failure rate is reduced, the product quality is improved, and the production efficiency is improved.

The invention provides a continuous variable convexity rolling mill working roll shape design method, a storage medium and electronic equipment, and belongs to the technical field of steel production equipment design. The method comprises the following steps that configuration parameters and target control parameters of a rolling mill and the roll abrasion condition are obtained; a basic roll shape curve of a working roll is determined according to the rolling mill configuration parameters and the target control parameters, and a superposition function curve and the action range of the superposition function curve are determined according to the roll abrasion condition; and according to the action range of the superposition function curve, the superposition function curve is combined on the basic roll shape curve, and the surface roll shape curve of the working roll is obtained. The plate shape problem that the thickness of the edge of the plate strip is suddenly reduced can be relieved, the plate shape quality and the yield of a production line are improved, and the roller shape design and optimization method can bring remarkable economic benefits to iron and steel enterprises.

The present application relates to a kind of hot galvanizing production line finishing machine roll replacement reduces the method of degraded product, belong to hot galvanizing continuous production process technical field.The technical scheme is: according to the following steps to operate: step one: reduce process section one and process section two strip speed;Step two: when strip weld reaches finishing machine outlet, process section two strip speed reduces to 0 m / min;Step three: replace finishing machine work roll, and flushing is carried out to the work roll after replacement;Step four: after finishing machine work roll flushing is completed, process section two speed strip starts to run with the minimum strip running speed specified by finishing machine, tension leveler and roll coater, when finishing machine, tension leveler and roll coater start finishing, tension leveling and roll coating, process section two strip speed is gradually increased, and intermediate looper is released, until process section one and process section two restore normal production speed.The beneficial effects of the present application are: it can reduce the degraded product of strip due to not finishing when finishing machine roll replacement.

This invention relates to a method for controlling roll wear, belonging to the technical field of hot continuous rolling processes. The technical solution of this invention is as follows: collecting characteristic parameters of a four-high rolling mill; collecting performance and dimensional parameters of typical strip steel during rolling; setting initial roll profile parameters for the CVC work rolls; establishing a comprehensive objective function model for controlling strip exit shape and roll wear; optimizing the work roll profile parameters and outputting optimal parameter values. The beneficial effects of this invention are: minimizing roll wear while ensuring actual production, improving strip shape quality, bringing economic benefits to enterprises, and possessing good promotional value.

The utility model provides a working roll capable of reducing transverse thickness difference of cold-rolled strip steel, which relates to the technical field of cold rolling process, a roll convexity is arranged in the middle of a roll body of the working roll, symmetrical strip steel edge thinning areas are arranged at positions of the roll body corresponding to two side parts of the strip steel, and small-diameter areas are formed. The diameter of the roller body corresponding to the strip steel edge thinning area is smaller than the diameter of the roller convexity in the middle of the roller body; wherein the strip steel edge thinning area is an extension area of the part of the strip steel width and the edge of the strip steel in the width direction and is used for counteracting the thickness difference caused by too high rolling pressure of the edge of the strip steel in the rolling process. Rolling mill equipment and rollers do not need to be modified, and roller consumption of the rollers is not increased. And the transverse thickness difference of the strip steel is less than 0.0068 mm.

The present application relates to the technical field of hot continuous rolling low carbon steel, in particular to a method for controlling the surface pitted scale defects of hot continuous rolling low carbon steel. 1) The temperature of the low carbon steel heating furnace is controlled at 1160-1200 DEG C; 2) according to the change of the target thickness of the product, the entry temperature of the finishing mill is controlled: if the target thickness is less than or equal to 2.2 mm, the entry temperature of the finishing mill is controlled at 1035-1060 DEG C; if the target thickness is greater than 2.2 mm, the entry temperature of the finishing mill is controlled at 1015-1040 DEG C; 3) the first rolling mill of the finishing mill is F1, and the Nth rolling mill is FN in turn, and the roll gap cooling water of F1-F5 is put in; 4) the hot rolling oil manifold and nozzle are installed at the outlet of the backup roll of F1-F5; 5) the high speed steel work roll is used for the rolling mill; 6) the water pressure of F1-F7 is controlled at 0.5-1.2 MPa; 7) the target value of the finish rolling temperature is controlled at 750-900 DEG C; 8) the cycle of the high speed steel work roll is controlled within 2-6 cycles; 9) the same batch of high speed steel work roll is avoided to be at the end period. The surface pitted scale defects of hot continuous rolling low carbon steel can be effectively controlled, and the surface quality of the strip steel is improved.

The utility model relates to the technical field of veneer reeling machines, and discloses a veneer reeling machine high-precision roller positioning device which comprises a veneer reeling machine body, a base, an adjusting mechanism, a material taking mechanism and an encoder. The first guide rods are symmetrically arranged relative to the center of the first lead screw, the first sliding block is in threaded connection with the outer side of the first lead screw, and the mounting plate is fixedly mounted on the side, close to the plate rolling machine body, of the first sliding block. The first motor drives the first lead screw to rotate so as to drive the sliding block to move longitudinally, then the sliding block and the mounting plate are used in cooperation so as to drive the working roller to move longitudinally, the first lead screw is connected with the encoder through the elastic coupler, and the encoder measures the rotation of the first lead screw so as to adjust the position of the working roller. Therefore, the longitudinal displacement distance of the working roll driven by the first sliding block can be accurately calculated, and high-precision adjustment of the working roll is achieved.

This invention discloses a process for producing 65Mn steel through continuous casting and rolling of thin slabs, belonging to the field of steel production. The method includes the following steps: steelmaking, casting and rolling, and slow cooling. The steel composition is controlled as follows: C: 0.62%-0.70%, Si: 0.17%-0.37%, Mn: 0.90%-1.20%, P≤0.035%, S≤0.030%, Cr≤0.20%, Ni≤0.30%, Cu≤0.25%, with the balance being Fe and impurities. In the continuous casting process, the slab thickness is 90mm-110mm, the casting speed is controlled at 4.0m / min-4.8m / min, and the temperature difference of the slab cross-section is controlled at 40℃-65℃. In the finishing rolling process, the F3 work roll uses high-speed steel rolls, and the F4 and F5 work rolls use high-nickel-chromium rolls. The crown of the F3 work roll is set to be 200µm larger than that of other steel grades, and the load distribution of each stand follows a decreasing principle. Compared with existing technologies, this method improves the yield rate of straight hair curls.

The invention belongs to the technical field of strip steel processes, and provides a strip steel rolling process emulsion concentration calculation method which comprises the following steps: determining the demulsification critical temperature of an emulsion, and comparing the demulsification critical temperature with the temperature before the emulsion is sprayed to a working roll to judge whether primary correction of emulsion concentration calculation needs to be carried out or not; if necessary, constructing a temperature-oil phase enrichment model, determining an oil phase enrichment coefficient at the temperature before the emulsion is jetted to a working roll, performing primary correction of emulsion concentration calculation in combination with the apparent concentration of the emulsion calculated by a sampling and weighing method, performing unit sample division on the emulsion, and calculating the concentration of the emulsion; the method comprises the following steps: extracting an emulsion unit sample, carrying out demulsification complete analysis on the emulsion unit sample, judging whether the emulsion concentration calculation needs to be subjected to secondary correction or not, and if so, carrying out secondary correction on the emulsion concentration calculation according to an emulsion demulsification ratio obtained by the demulsification complete analysis, so as to eliminate the influence of high-temperature demulsification and local non-uniform demulsification on the emulsion concentration calculation layer by layer.

The application discloses a rolling device and a rolling system, relates to the rolling technical field, and aims to solve the problems of reducing strip defects such as edge wave and edge crack and improving the quality of composite strip. The rolling device comprises a straightening device, an auxiliary device and a rolling device. The straightening device is used for straightening a strip to obtain a straightened strip. The auxiliary device comprises a surrounding lining strip, and the surrounding lining strip has a first accommodating space. In the height direction of the rolling device, the rolling device comprises a first work roll and a second work roll which are oppositely and spacedly arranged, and at least part of the second work roll is located in the first accommodating space. When the rolling device works, the lining strip and the straightened strip are attached together and are located between the first work roll and the second work roll, and the straightened strip is located between the lining strip and the first work roll.

The utility model discloses a rolling mill capable of reducing oil spots on the surface of a rolled product, and relates to the technical field of rolling mills. The oil-gas lubricating system comprises an oil-gas lubricating disc and a high-level oil tank which are connected with each other, the oil-gas lubricating disc is connected with a compressed air generating device, and compressed air drives lubricating oil to the working rollers; the oil gas discharging system comprises an oil gas collecting cover, a smoke discharging pipeline and a smoke discharging fan, the oil gas collecting cover covers the working roller and is connected to the smoke discharging pipeline, and the other end of the smoke discharging pipeline is connected to the smoke discharging fan. By improving the structure, oil spots of rolled products are reduced.

The invention relates to a four-roll or six-roll cold rolling mill (1) configured to roll a metal strip,-a roll stand (2) comprising a first pair of uprights on the front side and a second pair of uprights on the rear side,-an upper working roll (WRS) comprising a roll table configured to be in contact with the upper surface of the metal strip and two guide ends,-a lower working roll (WRI) comprising a first pair of uprights on the front side and a second pair of uprights on the rear side, the invention relates to a metal strip roller comprising a roller table configured to be in contact with a lower surface of a metal strip and two guide ends. A first left and right pushing mechanism (31g, 31d) and a second left and right pushing mechanism comprising all or part of the rotating screw pushing means to ensure lateral displacement between the working rolls and the roll bearings on the working rolls.