241 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 present invention relates to the field of aluminum cold rolling technology, and specifically to an aluminum cold rolling production device and production method for can body materials, including a stable cold rolling device for rolling aluminum alloy strips, the stable cold rolling device including a driving platform, a cold rolling roller, an outer wall cleaning mechanism, a first ball screw slide, an identification detection device and a spare replacement installation platform; two cold rolling rollers are provided and installed on the driving platform; two outer wall cleaning mechanisms are provided, and an outer wall cleaning mechanism is provided on the side of each cold rolling roller; two first ball screw slides are provided, and a first ball screw slide is installed on the working end of each outer wall cleaning mechanism; two identification detection devices are provided, and an identification detection device is installed on the active end of each first ball screw slide; the spare replacement installation platform is provided on the side of the driving platform, and spare rollers to be replaced are stored on the spare replacement installation platform. The present invention can effectively ensure the stability of production and improve productivity at the same time.

The invention relates to a method for calculating a rolling mill roll changing pressing position, and belongs to the technical field of rolling mill roll changing methods. According to the technical scheme, the method comprises the steps that CAD modeling is carried out, a constraint relation is established to simulate field reality, indication marking lines and a size relation are set, key parameter sizes are displayed in real time, related size links are established, data calculation and automatic correction are carried out through a set logic relation, and calculation and inspection of key parameters such as the rolling mill roll changing pressing position are completed. And meanwhile, a numerical value displayed on an operation interface is compared with a calculation result, and data is manually corrected. The method has the beneficial effects that key parameters such as an optimal screw-down position value can be displayed only by inputting diameter data by using the model when the supporting roll is replaced every time, so that the screw-down position corresponding to each set of supporting roll is suitable for working rolls in all diameter ranges, tedious calculation is avoided, and the method has the advantages of simplicity, rapidness, high calculation precision and the like, and is suitable for popularization and application. The method can effectively solve the problem of accurate calculation of the rolling mill roll change screw-down position.

A control system employs model-based multivariable predictive control for cold rolling mills to improve plate thickness uniformity to meet or exceed flatness specifications. Compared with a traditional control method using PID (Proportion Integration Differentiation)-based closed-loop control, the deviation between the thickness and the flatness of the metal plate and the standard requirement is obviously reduced, and meanwhile, the control precision is improved. The control system is particularly suitable for controlling the four-roller irreversible single-base metal rolling mill. The rolling mill base has a first working roll and a second working roll positioned between a first support roll and a second support roll, respectively. The plurality of sensors measure and acquire characteristic data of the material plate. A model predictive controller manipulates the actuators to adjust thickness and flatness. When rolling a metal sheet, the controller performs automatic specification control (i.e., machine direction metal control) and automatic flatness control (i.e., lateral metal sheet control).

The invention discloses a manufacturing method of a long-service supporting roller, which belongs to the field of roller manufacturing, and comprises the following steps: smelting an alloy, and preparing steel raw materials, so that the steel comprises the following chemical components in percentage by weight: 0.55 to 0.75 percent of C, 0.10 to 0.40 percent of Si, 0.40 to 0.80 percent of Mn, 5.50 to 6.50 percent of Cr, 0.55 to 0.80 percent of Ni, 0.70 to 1.20 percent of Mo, 0.20 to 0.50 percent of V and less than or equal to 0.010 percent of P; s is less than or equal to 0.010%; and the balance of Fe and inevitable impurities. Preparing steel ingots from steel raw materials according to a smelting procedure production process; manufacturing the steel ingot into a roller blank according to a forging procedure production process; the roller blank is subjected to heat treatment according to preheating, induction type differential temperature heating, rapid cooling, high-temperature tempering and secondary tempering; and according to the drawing requirements of a finished product, the roller blank subjected to heat treatment is machined, and the long-roller-service forged steel supporting roller is obtained. The high-performance supporting roller can be manufactured and produced, and the problems of abrasion resistance and accident resistance of the supporting roller on a rolling line are effectively solved.

The invention discloses a manufacturing method of a semi-high-speed steel supporting roller, which belongs to the field of roller manufacturing and comprises the following steps: preparing steel raw materials, so that the steel comprises the following chemical components in percentage by weight: 0.35-0.45% of C, 1.20-1.40% of Si, 0.40-0.60% of Mn, 7.00-9.00% of Cr, less than or equal to 1.00% of Ni, 2.00-3.00% of Mo, 0.50-0.80% of V and less than or equal to 0.010% of P; s is less than or equal to 0.010%; and the balance of Fe and inevitable impurities. Molten steel is prepared according to a steel smelting principle, and a steel ingot is prepared by pouring the molten steel according to a low-pouring-speed technology; a steel ingot is manufactured into a roller blank according to a forging procedure production process, the roller blank is sequentially subjected to heat treatment including preheating, high-temperature heating, precooling, rapid cooling and three times of tempering, the roller blank subjected to heat treatment is machined, the dimensional tolerance and the form and location tolerance of all parts are guaranteed, and finally the forged steel supporting roller made of the semi-high-speed steel material is obtained. According to the method, the large forged steel supporting roller with high wear resistance and high accident resistance can be produced, and production is effectively guaranteed.

The invention provides a novel four-roll hot mill roll bending device which comprises a working roll, a supporting roll, a rack, an operation side fixing block, a transmission side fixing block, a roll shifting cylinder, an operation side moving block and a transmission side moving block, bearing seats of the working roll and the supporting roll are in contact connection through a base plate, a hydraulic cylinder acts on the bearing seat of the supporting roll and abuts against the base plate, and the base plate is in contact connection with the hydraulic cylinder. The operation side fixing block and the transmission side fixing block are fixedly installed on the machine frame, the roll shifting cylinder is installed on the operation side fixing block, and one end of the roll shifting cylinder is connected with the operation side fixing block. The operation side moving block is arranged on the operation side fixing block in a sliding mode and connected with the roll shifting cylinder through a locking pin shaft. The transmission side moving block is arranged on the transmission side fixed block in a sliding manner; and the operation side moving block and the transmission side moving block are connected with the working roll bearing seat through the bearing seat locking device. Roll bending control is carried out on the supporting roll and the working roll at the same time, the surface quality and the yield of the plate blank are improved, and the key effect is achieved on production and efficiency improvement of a steel mill.

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

The invention relates to a method for optimizing tempering heat preservation time in the tempering process of a supporting roller forge piece based on a finite element model, belongs to the technical field of heat treatment of the supporting roller forge piece, and solves at least one of the problems of energy waste, equipment occupation, high product cost and the like caused by overlong tempering time of an existing method. According to the method, the tempering heat preservation time of the supporting roller is optimized by integrating changes of the temperature, the structures and the residual stress, and the reduction or stabilization time of the residual stress is judged according to stress relaxation curves of different structures and is not obtained through finite element simulation in the creep deformation process; according to the method for judging the stress relaxation degree under the conditions of different structures and loads, namely, the stress relaxation curve is normalized, and the method can be directly and repeatedly used for optimizing the tempering heat preservation time of the supporting rollers which are made of the same material and have different specifications and different process parameters.

The invention relates to the technical field of forged steel supporting roller quenching, in particular to an induction type quenching device for forged steel supporting roller production, which comprises a base, a lifting plate is arranged on one side of the top of the base, a rotating plate is rotatably connected to the lifting plate through a rotating shaft, a clamping assembly is arranged on the rotating plate, and a water storage tank is fixedly connected to the top of the base; according to the forged steel supporting roller clamping device, the arranged clamping assembly is combined with the self-adaptive clamp, the forged steel supporting roller is firstly positioned and pre-clamped so as to ensure that the forged steel supporting roller can be stably clamped through the upper tip and the lower tip, then the trapezoidal guide block is promoted to move in combination with the hoisting operation, secondary reinforced clamping is conducted on the forged steel supporting roller, and the clamping efficiency is improved. And the position of the clamping base is synchronously locked, the anti-disengaging type stable clamping effect in the hoisting and feeding process is achieved, through the arranged quenching assembly, instant water spraying quenching treatment after induction heating is achieved, and the quenching efficiency and quality of the large forged steel supporting roller are improved.

The utility model provides a balancing device for a back-up roll of a finishing machine, which comprises two sets of lifting components, the two lifting components are oppositely arranged along the axial direction of the back-up roll on the finishing machine, and each lifting component comprises a connecting rod, an oil cylinder, an oil cylinder seat, two supports and two hook heads used for hooking a bearing seat of the back-up roll on the finishing machine, the oil cylinder base and the two supports are fixed to the top of a machine frame of the finishing machine and are perpendicular to the axial direction of an upper supporting roller of the finishing machine, the two supports are symmetrically arranged on the two sides of the oil cylinder base, a telescopic rod at the top of the oil cylinder is connected with the connecting rod through a first pin shaft, the bottom of the oil cylinder is connected with the oil cylinder base through a second pin shaft, and the connecting rod is horizontally arranged and located above the supports. The top of the support is provided with a limiting face for limiting the connecting rod, the two ends of the connecting rod are each fixedly provided with a pull rod perpendicular to the axial direction of an upper supporting roller of the finishing machine, the two pull rods are vertically arranged, the support is provided with first through holes for the pull rods to penetrate through, the bottoms of the pull rods are connected with the hook heads, and the pull rods correspond to the hook heads in a one-to-one mode.

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

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 embodiment of the invention discloses a cylinder assembling device of a cylinder mixer and a mounting method of a cylinder, a cylinder comprises a first cylinder and a second cylinder, the cylinder assembling device comprises at least two carrier rollers, at least two supporting rollers and a driving part, the two carrier rollers can be located on the two sides of the first cylinder respectively, the carrier rollers can move along with the first cylinder, and the driving part drives the first cylinder to move along with the second cylinder. The two supporting rollers can be located on the two sides of the second barrel correspondingly, the supporting rollers are used for supporting and rotating the second barrel so that the second barrel can be coaxially connected with the first barrel, and the driving part is connected with the supporting rollers and used for driving the supporting rollers to rotate. When the first barrel body and the second barrel body are connected, the first barrel body is driven by the driving piece to rotate, so that welding operation and barrel body rotation can be matched with each other, and a flat welding process can be adopted in the whole welding process. Therefore, the connection convenience and efficiency of the barrel are improved, the connection quality of the barrel is improved, and the installation and transportation cost of the barrel is reduced.

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 utility model discloses an automatic adjusting device of a core rod supporting roller for a cold rolling seamless steel pipe production line, relates to the technical field of automatic adjusting device structures of supporting rollers, and aims to solve the problems that the supporting effect is influenced and the processing of the core rod is influenced because the conventional supporting roller cannot be automatically adjusted conveniently when supporting the core rod. Mounting supporting frames are installed on the two sides of the upper portion of the stable base, limiting sliding grooves are formed in the mounting supporting frames, mounting supporting bases are installed on the upper portions of the mounting supporting frames, fixing bases are arranged at the upper ends of the mounting supporting bases, and hydraulic devices are installed on the upper portions of the mounting supporting bases. A hydraulic device is installed on the upper portion of the installation supporting frame, a telescopic rod is installed below the hydraulic device, a limiting installation base is arranged at the lower end of the telescopic rod, a supporting roller is installed between the two installation supporting frames, installation shafts are arranged at the two ends of the supporting roller, movable sliding bases are installed on the two sides of the supporting roller, and limiting clamping bases are arranged at the upper ends of the movable sliding bases.

The invention relates to the technical field of bearing seat cleaning, in particular to supporting roller bearing seat surface oil, rust and scale removing equipment and method.The supporting roller bearing seat surface oil, rust and scale removing equipment comprises a box body, the box body is arranged in a pit formed in the ground, a high-pressure flushing pump, a cleaning oil tank and an oil cleaning pump are fixedly arranged above the ground, and the output end of the high-pressure flushing pump communicates with a hard pipe and a hose; one end of the hose is communicated with a high-pressure water gun, one end of the hard pipe is communicated with a purging pipe structure, a roller saddle is fixed at the bottom end of the box body, a liquid collecting box is arranged below the box body and close to one side, a grating plate covers the liquid collecting box, and a sewage pump is arranged above the grating plate; the purging pipe structure comprises an inner side face nozzle set, a bottom face nozzle set and an outer side face nozzle set, and the roller saddles are located on the two sides of the bottom face nozzle set. The problems that dirt on the outer side of an existing back-up roll bearing seat is very difficult to clean manually, cleaning is not thorough through a conventional method, and great safety risks exist during manual cleaning are solved.

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 invention relates to the technical field of steel rolling equipment, and provides a method for stably shearing cold-rolled thin strip steel, which comprises the following steps: enabling the lower surface of the strip steel to be in a horizontal state through a support roller and a free roller, and controlling a press roller which is arranged opposite to the support roller in the vertical direction to horizontally contact with the upper surface of the strip steel, the strip steel is horizontally gripped between the pressing roller and the supporting roller, and the strip steel is sheared through the cutter head. The invention further provides a control device for stable shearing of the cold-rolled thin strip steel to execute the method. According to the method and the control device, the cutterheads on the two sides of the strip steel can stably shear the strip steel clamped between the pressing roller and the supporting roller, and the technical problem that in the prior art, the middle of the strip steel slightly arches, and consequently edge cutting is poor is solved.

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.