121 results about "Backup roll" patented technology

The invention provides an evaluation method for surfacing repair of a supporting roller, and belongs to the technical field of surfacing repair, and the evaluation method comprises the following steps: S1, preprocessing: constructing a digital twinborn model according to size data; s2, defect detection: analyzing the flaw detection data in combination with a convolutional neural network, generating defect data, and feeding back the defect data to the digital twinborn model in real time; s3, process design: inputting the optimized process parameters and material component information into a digital twinborn model; s4, surfacing repair: collecting data of temperature, stress and welding parameters in real time, and associating the data with the digital twinborn model in real time; and S5, post-welding treatment is conducted, specifically, detected data are fed back to the digital twinborn model, and the effect of the whole surfacing repair process is evaluated. According to the evaluation method for surfacing repair of the supporting roller, accurate evaluation and optimization of the surfacing repair process of the supporting roller are achieved, the repair quality and efficiency are improved, the production cost is reduced, and a powerful guarantee is provided for stable operation of steel rolling production.

The utility model provides an upper supporting roll balancing device of a finishing machine. The upper supporting roll balancing device comprises a rack, the driving mechanism is used for simultaneously outputting two groups of horizontal forces in opposite directions; the force conversion mechanism is used for correspondingly converting each group of horizontal force into a group of force in the vertical direction at the same time; each group of vertical force has the same direction; the first end of the pull rod mechanism is connected with the force conversion mechanism, and the second end of the pull rod mechanism is matched with the T-shaped groove in the top of the upper supporting roller bearing seat. Therefore, the acting force in the horizontal direction and the acting force in the vertical direction are synchronously converted through a single driving source, the problem of poor synchronism caused by independent work of multiple traditional hydraulic cylinders is solved, the inclination risk in the lifting process of the upper supporting roller is prevented, and potential safety hazards of equipment are eliminated; meanwhile, complex detection elements such as a displacement sensor are omitted, the system structure is simplified, the equipment cost and the failure rate are reduced, and stable lifting of the upper supporting roller under the two working conditions of pushing-in and pushing-out is achieved.

The utility model relates to the technical field of heat treatment, in particular to an induction quenching device for a large forged steel supporting roller, which reduces solid impurities in cooling liquid, facilitates recycling of the cooling liquid, and is convenient to use and high in practicability. Comprising a bottom plate, a support and an electromagnetic induction heating coil, and the electromagnetic induction heating coil is fixedly installed at the upper end of the bottom plate through the support; the inner supporting chuck is installed on the bottom plate through the moving mechanism, the moving mechanism is used for moving the inner supporting chuck, the water tank is fixedly installed on the bottom plate through the supporting frame, a cavity is formed in the water tank, an opening is formed in the upper end of the water tank, and the spraying mechanism is installed on the water tank; the spraying mechanism has a spraying function, the filtering mechanism is installed in a cavity of the water tank and has a filtering function, and cooling liquid is arranged in the cavity of the water tank.

The utility model discloses a rotary driving mechanism for induction heating integral quenching of a bearing ring, which is characterized in that a horizontal support frame is arranged on diagonal lines of four corners of a quenching tank in a cross manner, and a worm and gear transmission mechanism is arranged at the cross center position of the horizontal support frame; the worm and gear transmission mechanism inputs power by a torque motor through a worm gear speed reducer, a gear is arranged on a worm gear shaft, the gear is meshed with a rack, a rotary positioning roller is movably supported and positioned on the annular surface of a workpiece, and the workpiece can be driven to rotate when a driving supporting roller rotates; the structure is compact and reasonable in design, accurate and stable control over overall rotating operation of the induction quenching workpiece can be achieved, the rotating positioning rollers make contact with the annular face of the workpiece all the time in the heating and quenching process, the device adapts to workpiece size and stress changes caused by thermal expansion when the workpiece is heated and cold contraction when quenching cooling is conducted, swinging of the workpiece during high-speed rotating is avoided, and the workpiece quality is improved. Quenching heating and cooling are more uniform, and the product quality of induction heating whole quenching workpieces is improved.

The invention discloses a high-performance cast cold roll evaluation method based on stress of a working layer and a bonding layer, and belongs to the technical field of metallurgical mechanical equipment design and life evaluation, and the method comprises the following steps: calculating the maximum contact pressure between a working roll and a supporting roll and the flattening width of a contact surface; further determining the maximum shear stress in the working roll and the depth position corresponding to the shear stress; according to radius changes of the working roller in different wear stages, the maximum contact pressure and the contact surface flattening width in different wear stages are calculated for multiple times, and then normal stress at the position of a bonding layer in each stage and shear stress derived from the normal stress are calculated; performing simulation verification on calculation data based on a stress field of finite element simulation; comparing the shear stress of the bonding layer obtained after calculation with the total stress level after the residual stress is considered, and the allowable shear stress of the same material; and the risk is judged. The service life of the roller can be prolonged, and the equipment loss cost of cold-rolled strip steel production is reduced.

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 invention discloses a convexity adjusting device for a working roll of a straightening machine and the straightening machine, relates to the technical field of straightening machines, and aims to solve the problems of how to flexibly and dynamically adjust each supporting roll on the straightening machine and improve the straightening precision and the surface quality of a plate. The convexity adjusting device for the working roll of the straightening machine is applied to the straightening machine, and the straightening machine comprises a rack and the working roll rotationally arranged on the rack. The convexity adjusting device for the working roll of the straightening machine comprises a supporting roll structure, a supporting roll structure and an adjusting device, the supporting roller structures are sequentially arranged in the axial direction of the working roller. The lifting structures are correspondingly and fixedly connected with the supporting roller structures, and the supporting roller structures are located between the lifting structures and the working rollers; the lifting structure is used for driving the supporting roll structure to press or be away from the area of the working roll corresponding to the supporting roll structure; the first mounting plate is fixed on the rack; the end, away from the supporting roller structure, of the lifting structure is fixedly connected with the first mounting plate.

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 provides a kind of replacement device for rolling mill backup roll.The utility model includes replacement subassembly and the backup roll pin cooperation of replacement subassembly, the backup roll pin includes pin head, steel wire rope connecting part and arc lifting lug, pin head, steel wire rope connecting part and arc lifting lug are sequentially connected, replacement subassembly includes handle portion, lengthening rod portion and hooking portion, the handle portion, lengthening rod portion and hooking portion are sequentially connected, the main part of the hooking portion is S shape, the end of the hooking portion can be placed into arc lifting lug.The utility model directly expands the arm action range of operator by setting lengthening rod portion, so that it can reach the backup roll box area that needs to climb ladder originally on ground or safety platform, by setting S-shaped hooking portion, the arc lifting lug of backup roll pin can be reliably hooked / catched, the design of S shape makes it can pull pin, and also can stably push pin, effectively transmit the force applied by operator on ground to pin.

A coating device includes a backup roll configured to transport a workpiece; a coating die configured to discharge a coating liquid onto the workpiece; a drive section capable configured to drive the backup roll; and a heat dissipation section configured to dissipate heat generated in the drive section.

The application discloses a forging method of a wide and thick plate rolling mill supporting roller, belongs to the technical field of wide and thick plate rolling mill supporting roller manufacturing, and is used for solving at least one problem that in the prior art, the forging deformation and the surface quality of an oversized ingot are difficult to be considered, the excess metal at a bulging position is accumulated to the center to form deep layer folding, and the material yield rate and reliability of an oversized supporting roller are poor. The forging method comprises the following steps: providing a blank, pressing the blank, pre-drawing the blank after the blank is pressed, obtaining a square blank, upsetting the square blank in the height direction along the axial direction, obtaining an upset blank, compacting and drawing the upset blank, obtaining a compacted and drawn blank, drawing the compacted and drawn blank to the diameter of a forged roller body to obtain a basic blank, finally drawing the two ends of the basic blank to form a roller neck, and obtaining a final forged product. The application can be used for the forging of the wide and thick plate rolling mill supporting roller.

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 present application relates to the technical field of steel plate rolling, in particular to a kind of plate mill calibration method, comprising the following calibration steps: after completing mill equipment zero adjustment, open main drive to rotate at preset speed;When hydraulic press-down pressurization, stop when pressurizing each step pressure value n, after supporting roller complete rotation one week, continue pressurization again, until pressurization to maximum stiffness test pressure value m, pause pressurization;According to the roll gap and pressure data under constant pressure value obtained according to the above calibration steps, the duration under constant pressure value specifically refers to the duration when stopping pressurizing each step pressure value n and waiting for supporting roller complete rotation one week.The present application pressurizes according to step pressure during calibration process, and after stopping and waiting for supporting roller complete rotation one week, continue pressurization, the average roll gap and average pressure of mill under each step pressure can be obtained, using these data, model can regress more accurate mill stiffness curve under current supporting roller state.

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 provides a special tool for mounting a base plate at the bottom of a lower supporting roll bearing seat, which relates to the technical field of rolling mill roll system assembly and comprises a supporting base, universal wheels arranged at the bottom of the supporting base, a hydraulic telescopic mechanism arranged at the upper part of the supporting base and an elastic supporting mechanism arranged at the upper part of the hydraulic telescopic mechanism, an internal spring is arranged in the elastic supporting mechanism, a limiting mechanism for preventing the base plate from displacing from the upper portion of the elastic supporting mechanism is arranged on the upper portion of the elastic supporting mechanism, and a fixing mechanism for fixing the lowest moving position of the limiting mechanism is arranged on the side portion of the elastic supporting mechanism. The cushion block can move in the horizontal direction and the vertical direction, whether the cushion plate is installed in place or not is determined through the elastic supporting mechanism, the situation that the cushion plate to be installed is pressed and damaged is prevented while the installation quality is guaranteed, and the installation efficiency of the cushion block and the safety of the installation process are further improved by arranging the limiting mechanism.

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 stainless steel cold continuous rolling unit, which relates to the technical field of rolling equipment and comprises a rolling mill section, the rolling mill section comprises a plurality of rolling mills arranged in sequence, and each rolling mill comprises a working roll, a middle roll and a supporting roll. The symmetrical center line of the cross section projection of the supporting roller in the direction perpendicular to the extension direction of the supporting roller is deviated by a first preset distance relative to the symmetrical center line of the cross section projection of the middle roller in the direction perpendicular to the extension direction of the middle roller; the symmetrical center line of the cross section projection of the working roller in the direction perpendicular to the extension direction deviates by a second preset distance relative to the symmetrical center line of the cross section projection of the middle roller in the direction perpendicular to the extension direction, and the first preset distance is larger than the second preset distance. The roll system of the rolling mill adopts a double-eccentric design, and roll system stability and rolling mill service life can be both considered.

The present invention relates to a method for providing backup rolls and / or inserts (1) for work rolls of a roll stand required during roll change. In order to simplify the logistics during the replacement of the rolls of the roll stand, particularly the backup rolls, and to shorten the replacement time, the method comprises: a) assembling at least one insert (1), preferably at least two or three inserts (1), into an insert pack (2) at a first position remote from the roll stand; b) moving the insert pack (2) to a carrier element (3) at the first position; c) transporting the carrier element (3) together with the insert pack (2) from the first position to a position near the roll stand; d) removing the insert pack (2) from the carrier element (3) at the position near the roll stand; and e) using the insert (1) during roll change. Furthermore, the present invention relates to an apparatus therefor.

The application provides a rolling mill roll changing device, and relates to the technical field of steel rolling. The rolling mill roll changing device comprises a frame body, a first cover plate, a work roll transfer train, a chassis structure and a hydraulic cylinder. The frame body is slidingly connected to the chassis structure. The hydraulic cylinder is arranged on the chassis structure. The hydraulic cylinder is used to drive the frame body to slide relative to the chassis structure, so that the first cover plate and a backup roll connected to the frame body move together in a direction away from the rolling mill. The frame body is provided with a first longitudinal track. The chassis structure is provided with a second longitudinal track. The hydraulic cylinder is used to drive the frame body to slide relative to the chassis structure, so that the first longitudinal track is aligned with the second longitudinal track. The work roll transfer train is used to replace the work roll and move on the aligned second longitudinal track and first longitudinal track. Compared with the prior art, the rolling mill roll changing device solves the problem that a large cover plate needs to be manually lifted when the backup roll of the rolling mill is replaced, and improves the automation level and production efficiency of the rolling mill roll changing process.

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 application discloses a kind of medium wideband centrifugal composite steel supporting roller's quenching and tempering heat treatment method, belongs to supporting roller heat treatment technical field, solve the technical problem that after using existing supporting roller quenching and tempering heat treatment method, roll neck cracking or roll body hardness is unqualified.It is included in the quenching and tempering heat treatment method of the application: step 1, supporting roller is heated and kept warm as a whole;Step 2, after keeping warm, supporting roller is taken out of furnace, and is hoisted and transported to spray quenching bed;Step 3, carry out regional quenching treatment on spray quenching bed, reciprocating rotating supporting roller during regional quenching treatment process;Step 4, supporting roller after quenching is loaded into furnace and is tempered;Step 5, after tempering, the hardness of supporting roller is detected.The application is different for roll body roll neck material, and cooling is carried out by different cooling methods, and the production of high-quality centrifugal composite steel supporting roller product is realized.

The utility model discloses a feeding structure of a vertical ring rolling machine, which belongs to the technical field of vertical ring rolling machines and comprises an upper footstock, a stand column, a lower supporting seat and a lower base which are assembled into a frame-shaped three-dimensional structure through a first super nut and a second super nut. Meanwhile, an ejection cylinder of the oil cylinder is connected with the main shaft base, so that the main shaft base can move up and down along the stand column under the driving of the oil cylinder; a main roller is arranged between the main shaft bases, is movably mounted on the main shaft bases, and is driven by a motor connecting shaft to rotate during working; supporting rollers are symmetrically and movably installed on the lower supporting seats, and meanwhile the supporting rollers are arranged in parallel relative to the main roller. According to the device, the ejection oil cylinder is placed at the top end, so that the ejection oil cylinder is more convenient to disassemble, repair and maintain; and meanwhile, oxide skin and powder can be prevented from entering the copper sleeve to cause quick abrasion of the stand column and the copper sleeve.

A roller suspension mechanism of a rolling mill and a control method of the roller suspension mechanism are characterized in that a roller system and a power system are arranged in the rolling mill, three rows of rollers are sequentially distributed on the roller system from top to bottom and comprise four supporting rollers, three second middle rollers and two first middle rollers, and the power system comprises a hydraulic oil cylinder and a telescopic sleeve rod. The hydraulic oil cylinder is provided with a secondary pressure control valve, one end of the telescopic sleeve rod is controlled through the hydraulic oil cylinder, the other end of the telescopic sleeve rod is provided with a connecting rod, and the other end of the connecting rod is connected with the second middle roller and the first middle roller, so that the hydraulic oil cylinder drives the second middle roller and the first middle roller to act. The power system drives the supporting rollers to transmit through the transmission mechanism, suspension of the two intermediate rollers is adjusted through a pressure control program, a high-pressure suspension state and a low-pressure suspension state are included, remote switching is carried out, and therefore the functions of prolonging the service life and reducing the maintenance cost are achieved.

The invention discloses a method for repairing a quenched and tempered supporting roller, belongs to the technical field of supporting roller preparation, and solves the problems of long repairing process time and low production efficiency of the existing quenched and tempered supporting roller with unqualified hardness. The repair treatment method after hardening and tempering comprises the steps of preheating, differential temperature heating-quenching and tempering. The preheating comprises the following steps of: loading the supporting roller forge piece into a furnace at 280-320 DEG C for heating and heat preservation; quickly heating to T3, and preserving heat, wherein T3 is 575-630 DEG C; then, the furnace temperature is adjusted to 480-530 DEG C, and heat preservation continues; the differential temperature heating-quenching comprises the following steps: transferring the supporting roller into a differential temperature furnace, only heating a roller body, rapidly raising the furnace temperature to 1021-1070 DEG C, and carrying out air cooling on a roller neck; the temperature is kept at 1021-1070 DEG C; the furnace temperature is adjusted to 980-1000 DEG C for heat preservation; and then the roller body is sprayed and cooled. The surface hardness of the roller body and the hardness of the roller neck of the supporting roller obtained through the repairing method meet the technical requirements, and the residual stress is small.

The invention relates to an elastic floating support for forming die forging of a large supporting roller, a tool and a method, belongs to the technical field of supporting roller forging, and solves the problems that in the prior art, the time for removing a support is not easy to grasp, and the support removing operation is complex. The invention provides an elastic floating support for forming die forging of a large supporting roller, the elastic floating support comprises two semi-annular supports, and each semi-annular support is provided with a plurality of elastic assemblies with prestress and a plurality of limiting assemblies. The elastic floating support has certain prestress, and when the elastic floating support bears the weight of the extrusion cylinder, the elastic floating support does not change; when the borne load is further increased, the elastic assembly is compressed, and the effect that the upper end of the support floats along with the extrusion cylinder is achieved; according to the elastic floating support, the link that the support is removed in the supporting roller loose tooling forging process can be avoided, and on-site loose tooling forging operation is simplified.

The invention discloses a segmented combined bushing type large wide and thick plate supporting roller, and belongs to the technical field of large supporting rollers. The large wide and thick plate supporting roller comprises a roller shaft and a roller sleeve arranged on the roller shaft in a sleeving mode, the outer surface of the roller shaft and an inner hole of the roller sleeve are each of a taper structure with the outer side diameter larger than the inner side diameter, additional axial force pointing to the middle of the roller shaft is formed after hot charging, and the interference magnitude of the outer side of the roller sleeve is smaller than that of the inner side of the roller sleeve; grooves are formed in the outer surface of the roller shaft and the inner surface of the roller sleeve, and the grooves of the roller shaft and the roller sleeve are matched to form an oil storage cavity; a wireless pressure test valve mounting hole communicated with the oil storage cavity is formed between the contact surfaces of the roller sleeve and the roller shaft, a wireless pressure test valve is mounted in the wireless pressure test valve mounting hole, and the wireless pressure test valve remotely displays the pressure of the oil storage cavity through the Internet of Things technology; the roller sleeve comprises a left side roller sleeve body, a middle roller sleeve body and a right side roller sleeve body which are sequentially arranged in the axial direction of the roller shaft and are inlaid with the roller shaft through overall hot charging.

This invention discloses a heat treatment method for improving the internal toughness of a heavy plate support roller, belonging to the technical field of heavy plate support rollers; it solves the technical problems of poor internal toughness and weak accident resistance of existing heavy plate support rollers. The heat treatment method includes: S1, performing post-forging heat treatment on the heavy plate support roller; S2, performing quenching and tempering heat treatment on the heavy plate support roller; specifically including: S21, holding the post-forging heat-treated heavy plate support roller at 250-300℃ for the first time; S22, raising the temperature to 650-670℃ after the first holding; S23, performing a second holding at 650-670℃; S24, raising the temperature to 900-940℃ after the second holding; S25, performing a third holding at 900-940℃; S26, quenching after the third holding, followed by tempering to complete the quenching and tempering heat treatment; step 3, performing differential temperature heat treatment to obtain the heavy plate support roller product. This invention improves the impact toughness of the roll body while ensuring the mechanical properties of the roll neck.

This invention relates to the field of forged steel support roll manufacturing technology, specifically to a method for handling support rolls whose heating has been interrupted or which cannot be removed from the furnace for quenching. The method includes: cooling the support roll in a furnace while it is heating; and reheating the support roll in the furnace when the roll body temperature drops to 480-500°C. This invention seals the support roll in the furnace for annealing after heating has been interrupted or when it cannot be removed from the furnace, while simultaneously measuring the roll body surface temperature. Once the roll body surface temperature drops to 480-500°C, the heating and subsequent spray quenching and tempering processes are repeated, thus eliminating the preheating step. The method of this invention has the advantages of fewer steps, shorter cycle time, lower cost, and higher equipment utilization.

The present disclosure relates to a four-high or six-high rolling mill (1) comprising a roll stand having a first pair of uprights (M1, M2) and a second pair of uprights (M3, M4), a lateral-offset adjustment system configured to implement a lateral offset, seen in the direction of rolling, between, on the one hand, an axis of the lower work roll (or respectively of the upper work roll), and, on the other hand, an axis of a roll pressing against the work roll, such as a lower (or respectively upper) backup roll, the uprights of the first pair of uprights and of the second pair of uprights noticeably having bosses (B2; B4), pointing towards one another in pairs.