26 results about "Hot strip mill" patented technology

The invention provides a hot continuous rolling finish rolling section cooling method, system and equipment and a storage medium, and relates to the technical field of metallurgy hot rolling control, and the method comprises the steps that according to a product outline and a rolling schedule of rolled strip steel in a hot continuous rolling finish rolling section, the proportional relation between the inlet cooling water amount and the outlet cooling water amount is determined; based on the thermal load distribution of each area section of a roller in the hot continuous rolling finish rolling section and the width parameter of rolled strip steel, the distribution modes of inlet cooling water and outlet cooling water are determined respectively; when the hot continuous rolling finish rolling section is cooled according to the proportional relation and the distribution mode, rolling process parameters of the hot continuous rolling finish rolling section are obtained; and according to the rolling process parameters, in combination with a preset roller system model and a strip steel metal model, coupling control is conducted on the proportional relation and the distribution mode of the inlet cooling water amount and the outlet cooling water amount, and meanwhile fine adjustment is conducted on the inlet cooling water amount and the outlet cooling water amount till the hot continuous rolling finish rolling section meets the machining requirement. The cooling effect of the hot continuous rolling finish rolling section is improved.

A method is for mitigating the effects of coil collapse on hot strip mill coils. A hot strip coil is removed from the mandrel / downcoiler and pre-sagged to create an initial sag by allowing gravity cause the coil to sag in a first specific direction for a first period of time. Then, without coil eye support to limit sagging, the direction of the sag caused by the force of gravity is modified to a direction perpendicular to the first specific direction and gravity is allowed to sag the coil for a second period of time. The hot strip coil being cooled enough by the end of the second period of time such that the rate of sagging of the hot strip coil has become negligible.

The utility model relates to a lower step pad purging device of a hot-rolled strip rolling mill, and belongs to the technical field of hot-rolled strip production equipment in the metallurgical industry. According to the technical scheme, a transmission side lower step pad (1) and an operation side lower step pad (2) are connected to a lower step pad sliding seat (7) in a sliding mode, and the transmission side lower step pad (1) and the operation side lower step pad (2) are connected together; the transmission side upper cover (4), the middle upper cover (5) and the operation side upper cover (6) are respectively fixed on the lower step pad sliding seat (7), purging water collecting pipes (9) are respectively arranged on the transmission side upper cover (4), the middle upper cover (5) and the operation side upper cover (6), and a plurality of nozzles (10) facing the transmission side lower step pad (1) or the operation side lower step pad (2) are arranged on the purging water collecting pipes (9). Impurities such as iron oxide powder and iron oxide scale on the surface of the lower step pad can be effectively blown away, the cleanliness of the surface of the step pad is guaranteed, the service life of the step pad is prolonged, and deviation of rolling force on the operation side and the transmission side of a rolling mill is avoided.

The application discloses a kind of plate strip hot rolling mill electric screwdown anti-rotation devices, including rolling mill housing, thrust bearing seat and upper roll bearing seat, upper roll bearing seat is set in the lower side of thrust bearing seat, and protective cover is arranged between thrust bearing seat and rolling mill housing, and the screwdown screw connected with thrust bearing seat is arranged in the lower side of rolling mill housing, one support is respectively arranged in the opposite side surface of two thrust bearing seat, anti-rotation crossbeam is installed between two supports, long hole is symmetrically opened in the side surface both ends of anti-rotation crossbeam, pin hole is opened in the side surface of support corresponding with long hole, and support and anti-rotation crossbeam are fixed by pin, and detection device is arranged on anti-rotation crossbeam.In the thrust bearing seat installation support, the thrust bearing seat of both sides is connected by anti-rotation crossbeam, can play the role of preventing the rotation of thrust bearing seat, effectively avoid the problem that traditional anti-rotation bracket is seriously scratched on the surface of housing window.

The invention relates to a method for controlling or regulating the temperature of a steel strip during hot forming in a hot strip mill train. The superior control or regulating unit has a process model which determines a temperature development of the hot strip in advance. The target values of the individual units are adjusted on the basis of the predetermined temperature development.

The present application relates to a kind of first steel hit rate control method of hot strip mill equipment, the hot strip mill equipment includes N frame that can be supplied with strip and first steel hit rate control system;Its characterized in that, the first steel hit rate control method of the hot strip mill equipment includes the following steps that the first steel hit rate control system executes: with zero value self-learning module receives the first steel big data module sent historical first steel data, obtains zero value self-learning value ΔL i ;Estimate the deformation resistance deviation average value Δki of each frame rolling force;Estimate the thickness deviation Δhi of each frame;The present application is based on the model of strip threading self-adaption, in combination with multiple algorithms, more accurate calculation rolling force, bending force, the deviation correction coefficient of roll gap, collects and comprehensively considers multiple first steel hit deviation, obtains zero value self-learning coefficient;Can obtain more than the set number of three previous frames, improve the hit rate of first steel.

The utility model discloses a finish rolling working roll device of a hot rolling strip rolling mill, which comprises a lower working roll structure, the lower working roll structure comprises a lower transmission side bearing seat, a lower operation side bearing seat and a lower working roll main body, the lower operation side bearing seat is positioned on one side of the lower transmission side bearing seat, and the lower working roll main body is positioned on the other side of the lower operation side bearing seat. The lower working roll body is installed between the lower transmission side bearing seat and the lower operation side bearing seat, the lower transmission side bearing seat and the lower operation side bearing seat are each provided with a plurality of sets of supporting rolling wheels in a rotating mode, oil storage grooves are formed in the supporting rolling wheels, grease supplementing holes are formed in the supporting rolling wheels, and the grease supplementing holes are communicated with the oil storage grooves. The utility model relates to the field of design of finish rolling working roll devices, in particular to a finish rolling working roll device of a hot rolling strip rolling mill.

This invention discloses a method for controlling the roll gap position of the strip threading head in a hot strip mill, comprising the following steps: S1, determining whether there is a steel biting signal on the stand; if so, proceeding to step S2; S2, starting stand deviation calculation; S3, selecting the subsequent stand roll gap control mode based on the calculation result of step S2. This invention improves roll gap fluctuations caused by abnormal sensor position detection after strip threading by combining strip head tracking with the current roll gap position of the target stand and employing locked position control.

The present invention provides a feedforward thickness control method for a hot tandem rolling mill based on dynamic analysis, which relates to the technical field of rolling mill control and includes: establishing a dynamic model of the rolling mill of the hot tandem rolling mill unit and listing the dynamic equation in the vertical direction of the rolling mill; inputting the rolling force parameters in the rolling process into the dynamic equation in the vertical direction of the rolling mill, and obtaining the vibration displacement data of the work roll of the rolling mill through calculation; calculating the roll gap adjustment amount of the next stand according to the thickness fluctuation data at the outlet of the strip of the previous stand, and implementing the roll gap adjustment by the screwdown control system according to the calculated roll gap adjustment amount; the present invention greatly eliminates the influence of the thickness fluctuation of the strip between stands caused by the vibration of the rolling mill on the thickness accuracy of the finished strip through the thickness feedforward control method based on dynamic analysis, and solves the problem that it is difficult for the traditional feedforward AGC control method to know the thickness fluctuation of the strip between stands. By adopting the thickness feedforward control method for the hot tandem rolling mill based on dynamic analysis of the present invention, the accuracy of strip thickness control is improved.

The invention discloses a method for correcting and setting in the threading process of a hot continuous rolling finishing mill group, which comprises the following steps of: sampling the actual rolling force of a rack and calculating an actual rolling force locking value, calculating and setting the roll gap correction amount of a next rack, reversely calculating and compensating the speed correction amount of a previous rack according to the roll gap correction amount of the next rack, and correcting and setting the speed correction amount of the previous rack. And according to the adjusting logic, the steel biting events are sequentially transmitted step by step along the racks, and after steel biting of all the racks is completed, all the temporary correction values are reset. The method has the beneficial effects that based on real-time sampling data, accurate roll gap correction is carried out on the next rack, and efficient control over the outlet head thickness is achieved, so that the head thickness precision is improved, meanwhile, expansion and transmission of thickness deviation are restrained from the source, the situation that the whole-line rolling steady state is damaged due to violent adjustment of a downstream rack is avoided, and the production efficiency is improved. Therefore, product quality defects and even production accidents such as rolling deviation and belt breakage are prevented, the control precision is high, and the correction amount is accurate.

The invention relates to a method and system for optimizing the hot charging rate of a casting blank of a hot-rolled strip production line, belongs to the technical field of hot-rolled strip preparation processes, and solves the problems that the overall hot charging rate of casting blank recharging in the existing hot-rolled strip production line is low, and the stack position recharging sequence of the casting blank at the same casting time lacks a reasonable dynamic adjustment mechanism. According to the method for optimizing the hot charging rate of the casting blank of the hot-rolled strip production line, the hot-rolled strip production line comprises more than one recharging stack position, and the stack position sequence determining process of charging the casting blank comprises the following steps that (1) the initial temperature T < initial > of the cut casting blank is determined; (2) the real-time temperature T of the single casting blank in the conveying process and the stacking state is calculated according to the initial temperature T < initial > and the composite temperature drop; and (3) the casting blank charging stacking position sequence is dynamically calculated in real time. And the hot charging rate of the hot charging steel grade casting blank continuously produced at a single casting time is improved.

The invention provides a method and system for identifying the tail position of an intermediate billet of a hot continuous rolling hot coil box, and the method comprises the steps: S1, collecting an image of the hot continuous rolling intermediate billet, and carrying out the extraction to obtain an optimal frame image; s2, preprocessing the optimal frame image, and extracting to obtain an image after the hot continuous rolling intermediate billet is rolled; s3, traversing all coordinate points of the rolled image of the hot continuous rolling intermediate billet, and establishing a coordinate point set; extracting the coordinate value of the minimum X of each coordinate point set to form a new coordinate point set; s4, according to the new coordinate point set, a tail contour fitting straight line of the hot continuous rolling intermediate billet is obtained through fitting; and calculating to obtain the tail contour motion radian of the hot continuous rolling intermediate billet, further obtaining an included angle between a tail contour fitting straight line and a preset horizontal line, judging whether the included angle is in a preset range or not, and further realizing risk control processing. The rolling stability and the product quality are remarkably improved, the scrap steel rate and the energy consumption are reduced, and meanwhile an automatic production closed loop is constructed.

The invention discloses a demisting device and method for a hot continuous rolling production line, and belongs to the field of steel rolling. According to the technical scheme, the demisting device of the hot continuous rolling production line comprises a demisting box, a plurality of pumping and discharging fans are arranged in the demisting box, a suction inlet for forming mist is formed in the bottom of the demisting box in an open mode, a movable mist discharging fan is movably arranged below the suction inlet, the air pumping direction of the movable mist discharging fan is from bottom to top, and the air pumping direction of the movable mist discharging fan is from bottom to top. And the water is discharged into the demisting box. The suction inlet with the open bottom expands the mist adsorption range, the movable mist exhaust fan is matched with the bottom-up air draft direction, the mist generation source can be accurately aligned, mist diffusion is avoided, the suction and exhaust fan and the movable mist exhaust fan form an up-and-down linkage suction and exhaust structure, the flow guide effect on the mist concentration generation position is enhanced, the demisting efficiency is greatly improved, and the demisting effect is improved. And mist escape is reduced.

The application provides a hot-rolled strip wave detection device and method, which comprises a host computer, a data storage server and a plurality of laser ranging sensors installed below the entry table of a hot finishing mill; the detection direction of the laser ranging sensors is perpendicular to the strip input in the incoming process of the hot finishing mill above the laser ranging sensors, so as to collect the wave state data of the strip input in the incoming process and store the collected data in the data storage server; the host computer processes the wave state data stored in the data storage server to generate a complete wave curve of the strip in the production process of the strip; the host computer calculates the standard deviation value of the wave curve of the strip to determine whether the value is reasonable; and when the deviation value of the wave curve is abnormally large, an alarm information is output; the application can detect the wave condition of the strip input in the entry of the hot finishing mill in real time, quickly and accurately determine the current wave condition of the input in the entry, take different measures for adjustment, and ensure the thickness difference quality stability of the hot-rolled aluminum coil.

This invention discloses a method and system for controlling the replacement of work rolls in a 1580 hot strip mill finishing mill. The method includes the following three processes occurring simultaneously at the start of roll replacement preparation: 1. The roll replacement trolley begins to move from the initial position E3 to the target position E9; 2. The mill equipment sequentially performs roll return to zero, main shaft positioning, and unloading; 3. The mill equipment sequentially lifts the looper and deploys the inlet and outlet guides; During roll removal, the upper support balance cylinder and the work roll track beam lifting cylinder simultaneously lift; the work roll balance cylinder activates during the lifting of the work roll track beam and the upper support balance cylinder; During roll loading, the upper support balance cylinder, the work roll balance cylinder, and the work roll track beam lifting cylinder simultaneously descend and retract; The roll replacement end marker is adjusted from the roll replacement trolley fully returning to the initial position E3 to the roll replacement trolley exiting a certain area of ​​the mill. This invention improves the efficiency of work roll replacement in the 1580 finishing mill, significantly shortens the roll replacement time, and effectively increases the operating rate of the hot rolling line.

This invention discloses a method for controlling the dynamic bite and slippage of the strip at the entrance stand of a hot strip mill. The hot strip mill has a lower work roll and a lower support roll below the rolling center, and an upper work roll and an upper support roll above it. The method includes: the distance between the top of the lower work roll and the stand base plate is the elevation; a shim adjustment area is provided between the bottom of the lower support roll and the stand base plate; when replacing the support roll and calculating the shim, the elevation is raised by 2-10mm, allowing the strip head to bite tightly against the lower roll surface when entering the entrance stand; the roll diameter ranges from F1 to F3 (0-30mm), and from F4 to F7 (0-20mm), with all maximum roll diameters used in the F1 stand, followed by the F2 and F3 stands; the roll gap + impact bounce = exit thickness is set; all mechanical clearances are eliminated through zero-adjustment pre-pressure of the new roll; the clamping force of the pinch rolls is 5-20 kN, and the rotation speed of the pinch rolls is synchronized with the speed of the roller table. This invention can effectively reduce slippage during dynamic engagement of the inlet rack.

The utility model discloses a hot-rolled strip rolling mill finish rolling inlet guide table segmented roller device which comprises a base, the base is installed on a small vertical roller memorial archway rack through bolts, segmented rollers are installed on the base through bolts in a combined mode, and the number of the segmented rollers is multiple. The sectional roller body is provided with a core shaft through a bearing, and each two sections of sectional roller body are supported by a shaft seat. The utility model relates to the field of design of guide table segmented rollers, in particular to a segmented roller device of a finish rolling inlet guide table of a hot rolling strip rolling mill.

A control method for an ultra-fast cooling system in a hot strip mill production line, belonging to the technical field of metal rolling, includes: the communication system collects the data of the rolled piece and transmits it to the process automation system, and after setting and calculation, the result is given to the basic automation system; when the rolled piece reaches the second rolling mill, the basic automation system sends the relevant flow rate and pressure mode data to the pumping station system, and the pumping station determines the frequency increase according to the water pump situation; when the strip head reaches the third rolling mill and is in the dry head control mode, the basic automation system calculates the compensation distance of the headers of the front and rear ultra-fast cooling systems; when the head reaches the fifth rolling mill, the initial opening degree of the bypass regulating valve is set and the pressure closed-loop control is started; when the head reaches the pyrometer at the exit of the finishing mill, the dynamic setting calculation is started and the pressure compensation of the front ultra-fast cooling system is processed; afterwards, according to the different positions of the strip head in the front and rear ultra-fast cooling systems, the bypass regulating valve is adjusted and the closed-loop control is switched; after the strip tail leaves each cooling area, the water pump frequency is reduced and the headers of the front and rear ultra-fast cooling systems are closed in sequence.

The present application relates to a kind of hot rolling hot coil box simple roll transfer method, utilize push roll and No.1 coil roller B roll to be lifted to higher than the roller surface of No.2 coil roller to the steel coil, make No.1 coil roller and No.2 coil roller simultaneously speed down, to its speed fall behind the speed of finishing mill and produce speed difference, steel coil is dragged to No.2 coil roller under the speed difference and realizes roll transfer.There is following beneficial effect: simple mechanical structure, less investment;Small amount of overhaul and maintenance work, low maintenance cost;Low failure rate in production process, high production efficiency.

The present invention relates to a method for manufacturing an ultra-thin low-alloy hot-rolled steel plate. Using a continuous casting slab with a thickness ≤ 200 mm as the raw material, it is required that the carbon content in the slab is not more than 0.20% and the carbon equivalent is not more than 0.45%. The slab is rolled into a rough rolling plate with a thickness of 40 - 60 mm on a wide and heavy plate rolling mill, and then three rough rolling plates with the same thickness, width and length dimensions are welded to form a composite slab. The composite slab undergoes a reasonable heating process and a precise rolling process to be rolled into a composite steel plate with a thickness of 9.0 ± 0.3 mm. After that, it is straightened by a hot straightening machine and enters a cooling bed for cooling. Finally, the edges of the composite steel plate are trimmed and the three plates are separated to obtain a steel plate with a thickness of 3 ± 0.3 mm and a width of 2000 - 2400 mm. It solves the technical problems that a wide and heavy plate rolling mill cannot produce ultra-thin specification products and a hot strip mill cannot produce thin plates of such width, improves the product supply specifications of wide and heavy plate enterprises, has the ability to form mass production, ensures product quality, and meets market requirements.

The application discloses a kind of open flat hot rolling system, including sequentially connected preheating box, hot rolling box, cooling box, and be provided with vertical roll guiding mechanism in preheating box, hot rolling box and cooling box;Preheating box is equipped with conveying roller way, and conveying roller way top is equipped with gas burner, and preheating box top is connected flue, and flue is connected heat exchanger, and heat exchanger is connected air inlet pipe and air outlet pipe, and air outlet pipe is connected with preheating box and hot rolling box respectively;Hot rolling box is equipped with upper and lower arrangement work roll and support roll, and the both sides of support roll are equipped with first support wheel;Cooling box is equipped with several second support wheel, and second support wheel top is equipped with cooling water spraying mechanism, and cooling box is also connected with air inlet pipe.The application can realize the pre-uniform heating of steel plate, high-quality hot rolling and timely cooling, greatly improve product quality, and energy utilization is high.

The application provides a hot continuous rolling finishing section cooling method, system, equipment and storage medium, relates to the metallurgical hot rolling control technical field, and the method comprises the following steps: according to the product outline and rolling procedure of the rolling strip in the hot continuous rolling finishing section, the proportional relationship of the inlet cooling water quantity and the outlet cooling water quantity is determined; based on the heat load distribution of each area section of the rolling roller in the hot continuous rolling finishing section and the width parameter of the rolling strip, the distribution mode of the inlet cooling water and the outlet cooling water is determined; when the hot continuous rolling finishing section is cooled according to the proportional relationship and the distribution mode, the rolling process parameter of the hot continuous rolling finishing section is obtained; according to the rolling process parameter, the preset roller system model and the strip metal model are combined, the proportional relationship and the distribution mode of the inlet cooling water quantity and the outlet cooling water quantity are coupled and controlled, and the inlet cooling water quantity and the outlet cooling water quantity are fine-tuned until the hot continuous rolling finishing section meets the processing requirements. The application improves the cooling effect of the hot continuous rolling finishing section.

A method for controlling or regulating the temperature of a steel strip in hot forming in a hot strip mill. A superordinate open-loop or closed-loop controller has a process model that predetermines the temperature development of the hot strip. The target values of the individual units are adjusted based on this predetermined temperature development.

The utility model relates to the technical field of metallurgy hot rolling equipment, in particular to a hydraulic damping type step pad lifting and balancing device of a hot rolling strip mill. The problems of vibration deviation, short service life and the like of a traditional device are solved, and the plate and strip rolling precision and the equipment stability are improved. The device comprises a plurality of elastic devices arranged below a lower stepped pad of the rolling mill, and the elastic devices are fixed on a sliding plate of a rack through flange plates. The elastic device comprises a high-pressure-resistant hydraulic oil cylinder, a piston rod is arranged in the hydraulic oil cylinder, labyrinth type clearance sealing is adopted, and an adjustable throttling valve is arranged on the hydraulic oil cylinder. The oil cylinder is vertically installed to replace a traditional flat spring, rigid supporting of a mechanical spring is replaced through the fluid dynamic damping characteristic, a high-reliability closed-loop control system is formed, the stability and precision problems in the rolling line adjusting process are solved, and gapless precise regulation and control of the step pad are achieved.

The invention provides a deviation rectification control method under the rolling abnormal condition of hot continuous rolling and finish rolling, and relates to the technical field of steel rolling. The method comprises the steps that after strip steel is threaded in a finishing mill and stabilized for a period of time, the rolling force deviation of the two sides of a rolling mill, the deviation of the actual tension and the set tension of a front loop and the opening degree deviation of the two sides of a front guide are monitored in real time; when the opening degree deviation or the tension deviation is larger than a set threshold value, the rolling force deviation of the two sides of the current rolling mill is stored, and the average roll gap is kept unchanged; whether the opening degree deviation changes continuously, whether the tension deviation changes continuously exceed a set threshold value and whether the rolling force deviation changes exceed a set threshold value are judged; calculating roll gap deviation correction on two sides of the rolling mill, and increasing a roll gap deviation adjustment range; and the adjustment amount is sent to a manual operation picture, and after manual intervention, the automatic adjustment amount of the roll gap deviation is kept unchanged. The method solves the problem of rolling waste caused by deviation of the strip steel in the hot continuous rolling and finish rolling process, and has positive significance for improving the rolling stability.

The invention relates to a method for treating hot strip coils, wherein after the coiling of a hot strip at the end of the hot strip mill and in particular before the completion of a transformation from austenite to ferrite of the hot strip structure, the hot strip coil is placed from a coiling device onto a device, wherein for the shape correction of the coil the coil is placed onto two spaced correction elements which contact the coil surface below the height center and spaced from the transverse center of the coil and a device for carrying out the method.