80 results about "Backup roll" patented technology

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 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.

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 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.

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.

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.

The utility model provides a kind of finishing mill support roll locking device, including locking plate and two fixed blocks, fixed block is equipped with fixed through-hole, fixed block is fixed on the face of arch by connecting piece through fixed through-hole, the upper and lower sides of each fixed block are formed with guide slot, locking plate is recessed and formed with two sliding slots, and the upper and lower sides of each sliding slot in locking plate are formed with guide block, the middle part of locking plate is equipped with long hole, locking plate is connected on the face of arch by connecting piece through long hole, and the side of fixed block close to the face of arch is set out of locking plate. So push locking plate to act in fixed block guide slot, because the side of fixed block close to the face of arch is set out of locking plate, so that locking plate is not close to the face of arch, so that action is smooth, and there is no friction loss problem;And fixed block does not participate in action;The guide slot of fixed block also plays the role of guiding movement, can avoid the problem that locking plate is inclined and cannot be completely withdrawn.

The present application relates to a kind of continuous rolling mill backup roll's forging tool and forging method, belong to backup roll forging technical field, solve the technical problems of the heart of the forging piece flaw detection unqualified, more forging piece surface crack and low forging production efficiency in prior art.The forging tool includes full coverage wide flat anvil auxiliary tool;Full coverage wide flat anvil auxiliary tool includes upper flat anvil and lower flat anvil;The structure and size of upper flat anvil and lower flat anvil are same and completely cover blank between upper flat anvil and lower flat anvil.The forging method includes: step 1, using full coverage wide flat anvil auxiliary tool to carry out multiple pass square bar drawing, chamfering and roundness;Step 2, after roundness, blank both ends are cut off, and the roll neck of the length of the nozzle section and the riser end is drawn, finally finishing product, obtains continuous rolling mill backup roll.The present application improves the surface quality of backup roll, and greatly saves production cost, improves production efficiency.

Rolling machine (1) includes work roll (10) that comes into contact with rolled material (K), backup roll (20) that supports work roll (10), housing (30) that accommodates work roll (10) and backup roll (20), first bearing (40) that supports work roll (10) with respect to housing (30), and second bearing (50) that supports backup roll (20) with respect to housing (30).

This invention discloses a method for manual intervention in online thickness anomalies of medium-thick plate hot rolling mills. The method includes: after the primary system of the hot rolling mill receives relevant parameters sent by the secondary system, the electric pressing system EGC's pressing screw (11), driven by the pressing motor (12), adjusts the roll gap of the upper and lower rolls (3) from large to small to the current rolling roll gap position; the hydraulic AGC cylinder (1) is raised, pushing the lower support roll (2) and the lower roll to the rolling line position; the roller table (4) transports the rolled piece (7) for reciprocating rolling in the hot rolling mill; the head of the finished product pass is measured and fed back by a thickness gauge (5); based on the feedback thickness, the operator manually intervenes in the thickness using the gap+ / gap- buttons in the lower left corner of the mill's main screen, combining real-time measurement feedback from the thickness gauge (5) for manual intervention optimization. The advantage of this invention is that it allows for quick and safe manual thickness intervention through newly added function buttons on the operating interface, improving product qualification rate.

Rolling machine (1) includes work roll (10) that extends in left-right direction (Y) and contacts with material (K) to be rolled, backup roll (20) that extends in the left-right direction and supports the work roll, housing (30) that accommodates the work roll and the backup roll and supports the work roll, beam member (60) that extends in the left-right direction around the work roll, displacement sensor (70) that is provided on the beam member, and beam support member (80) that supports the beam member.

The application discloses a high-efficiency roll changing device for a rolling mill, and belongs to the technical field of roll changing of the rolling mill. The high-efficiency roll changing device for the rolling mill can efficiently change the backup roll of the rolling mill, reduces roll changing time, improves factory production efficiency, and reduces safety hazards.

The utility model belongs to the technical field of mechanical equipment, and particularly relates to a roll welding mechanism for a composite current collector tab material, which comprises a rack, an upper roll welding shaft and a lower roll welding shaft are arranged on the rack, a rotatable supporting roller is arranged at the front side part of the rack, a rotatable first compression roller is arranged at a feeding end, and a rotatable second compression roller is arranged at a discharging end. The supporting roller is used for providing upward supporting force for the membrane area of the composite current collector, so that the composite current collector has a relatively fixed supporting effect in the welding process, and the supporting roller is matched with the first pressing roller and the second pressing roller to provide downward pressure for the composite current collector; the composite current collector is arranged on the lower roll welding shaft, so that the membrane area of the composite current collector wraps the upper top of the supporting roller, a certain wrap angle is formed on the welding area of the composite current collector and the pair of metal membranes on the lower roll welding shaft through the wrapping and shaping, the wrap angle can restrain thermal expansion deformation at the welding moment, and then a welded product is smoother and better in binding force.

This invention provides a method and device for detecting the accuracy of a rolling mill stand window. The method includes: step S1, preparation before detection; step S2, acquisition of calibration data on the operating side; step S3, calculation of reference position data on the operating side; step S4, measurement of the distance between the operating side lower support roll detection position, lower work roll detection position, upper work roll detection position and upper support roll detection position and the liner; step S5, measurement of the distance between the transmission side lower support roll detection position, lower work roll detection position, upper work roll detection position and upper support roll detection position and the liner; step S6, based on the data obtained in steps S1-S5, obtaining the distance between the liner surface at each detection point and the geometric center line B-B of the rolling mill stand, and obtaining the actual wear amount of the liner at each detection point by comparing it with the design standard value.

The utility model belongs to quenching technical field especially relates to a large -scale double -work frequency supporting roll quenching machine tool, include: bottom plate, the top surface fixed mounting of bottom plate has four installing rod, the same lift frame is slidably installed on four installing rod, the movable plate is slidably installed in lift frame, according to the length of supporting roll, starts first telescopic cylinder, promotes the mobile station to move to adjust the interval between two first mounting plate, the multiple clamping plates on two first carousel are convenient for the two -end clamping of supporting roll, when clamping the two -end of supporting roll, start second telescopic cylinder and promote the mobile disc to move, when the mobile disc moves, through the cooperation of second connecting seat, connecting rod, first connecting seat will drive multiple sliding blocks to move, multiple sliding blocks will drive multiple clamping plates to move, adjust the interval between multiple clamping plates to realize the two -end clamping of supporting roll, realize the fixation to supporting roll.

The invention relates to a method for screening multiple supporting rollers based on sliding-rolling coupling, belongs to the technical field of performance detection of core parts of wide and thick plate rolling equipment, and solves the problem that the screened supporting rollers are not suitable for application scenes due to the lack of effective evaluation standards of the supporting rollers in the prior art. The screening method comprises the following steps: pretreating a plurality of samples of a plurality of supporting rollers to obtain a first number of sliding test samples and a second number of rolling test samples corresponding to each supporting roller; obtaining sliding wear data of each supporting roller based on a reciprocating sliding friction wear test; based on a ball disc type rolling contact fatigue test, rolling contact fatigue failure data of each supporting roller is obtained; and according to the sliding wear data and the rolling contact fatigue failure data of each type of supporting rollers, screening the multiple types of supporting rollers to obtain the optimal type of supporting rollers. And the scene adaptability of the screened supporting roller is improved.