28results about "Roll speed control device" patented technology

This invention provides a thickness control method for a single-stand reversible cold rolling mill. The single-stand reversible cold rolling mill unit includes an inlet coiler, an outlet coiler, a mill body, a mill hydraulic system, an inlet thickness gauge, an outlet thickness gauge, an inlet speed gauge, an outlet speed gauge, an inlet tension gauge, and an outlet tension gauge. The single-stand reversible cold rolling mill unit also includes an S-roll, with S-rolls at both the inlet and outlet of the unit. The S-roll can rotate 180°, with the upper roll of the S-roll able to rotate to the lower roll position and the lower roll of the S-roll able to rotate to the upper roll position. The 180° rotation causes the strip steel to wind in an S-shape on the S-roll. The thickness difference of the strip steel is eliminated by adjusting the speed of the inlet S-roll to control the metal flow rate entering the roll gap.

The application relates to the field of titanium alloy production and discloses a titanium alloy disc round preparation method for eliminating overheated core structure, which comprises the following steps: sequentially adopting a rough rolling mill set, a medium rolling mill set, a finishing rolling mill set, a reducing sizing mill set and a high-speed wire rolling mill set for rolling; the rough rolling mill set comprises a front rack, a middle rack and a rear rack which are sequentially arranged along a rolling direction; for the rough rolling mill set, the deformation amount of the middle rack is controlled to be greater than the deformation amounts of the front rack and the rear rack; the finishing rolling mill set comprises multiple racks and roller tables arranged between adjacent racks; for the finishing rolling mill set, the running speed of the roller table is dynamically adjusted based on a target temperature difference between a core and a surface layer of a rolled piece after finishing rolling, the length of the roller table, the diameter of the rolled piece on the roller table and the starting temperature of the rolled piece on the roller table. The titanium alloy disc round core overheated structure can be effectively eliminated.

The present application belongs to the technical field of bearing steel hot rolling, and particularly relates to a hot-rolled bearing steel bar reticular carbide control model. The control model sets the roughing temperature range, the finishing temperature range, the temperature range entering the reducing and sizing unit, and the temperature range after the second water cooling in the control model, and combines the preset rolling specification and the performance of the cooling equipment. Since the parameters of the rolling system corresponding to the preset rolling specification are uniquely determined, the rolling speed of the rolling system and the fixed parameter data of the cooling equipment are determined during rolling, forming a fixed combination model of the rolling speed and the rolling cooling data suitable for the preset rolling specification bar. During production, only the respective data based on the rolling specification needs to be input in the computer control module or the corresponding rolling model needs to be directly called, so that the rolling quality is stably controllable.

The present invention discloses a control method and system for an out-of-furnace heat preservation roller table. The method includes: arranging a first heat detector beside the starting roller of the heat preservation roller table and a second heat detector beside the end roller of the heat preservation roller table. The first heat detector is close to the heating furnace, and the second heat detector is close to the rolling mill; when the first heat detector detects a billet, switching the roller speed in the heating furnace to keep it synchronized with the speed of the heat preservation roller table; when the current billet enters the rolling mill along the heat preservation roller table and receives a signal of steel biting, switching the speed of the heat preservation roller table to keep it synchronized with the rolling mill speed; when the second heat detector detects the arrival of the falling edge of the signal, increasing the speed of the heat preservation roller table to make the next billet move forward quickly along the heat preservation roller table until the arrival of the next steel biting signal. By specifically adjusting the speed of the heat preservation roller table, the present invention avoids roller wear and power loss, saves the cost of replacing rollers and spare parts, and reduces work delays and time delays.

This application relates to the field of steel rolling technology, and discloses a method, apparatus, and electronic equipment for predicting the rolling force of a cold rolling mill. The method includes: constructing a speed-rolling force relationship model based on the rolling speed and rolling force of the cold rolling mill; constructing a flow-rate-rolling force relationship model based on the roll gap flow rate and rolling force of the cold rolling mill; constructing a rolling force prediction model based on the speed-rolling force relationship model and the flow-rate-rolling force relationship model; obtaining the actual rolling speed and actual roll gap flow rate of the cold rolling mill; and determining the actual rolling force of the cold rolling mill based on the actual rolling speed, the actual roll gap flow rate, and the rolling force prediction model. The technical solution proposed in this application can improve the accuracy of rolling force prediction for cold rolling mills and enhance the production stability and manufacturing capability of cold rolling mills.

This application provides a method and storage medium for improving the thickness qualification rate of cold-rolled strip steel products, relating to the field of steel rolling production technology. The method includes: after starting the rolling mill, increasing the initial rolling speed for this rolling operation; during the rolling process, when the thickness deviation of the strip steel is within the allowable deviation range, increasing the rolling speed in a first stage; when the rolling speed after the first stage of speed increase exceeds a first limit value, switching the control mode in the automatic thickness control system from feedback AGC to per-second flow control, and simultaneously increasing the rolling speed in a second stage; when the rolling speed after the second stage of speed increase exceeds a second limit value, increasing the rolling speed in a third stage, where the second limit value is greater than the first limit value; and automatically tailing the strip steel at the highest process rolling speed during the tailing stage. This method can reduce the number of meters of thickness deviation at the head and tail of the strip steel, reduce longitudinal thickness deviation, and lower production costs.

In a roll stand (1), a rolling material (2) made of metal and having a rolling material leading edge (6) is to be rolled. A time of entry (t3), a rolling speed (vW) and a rolling moment (MW) are known to a control device (7) for the roll stand (1) before the rolling material leading edge (6) runs into the roll stand (1). Before a starting time (t2), which is before the entry time (t3), the control device (7) determines, for a period from the starting time (t2) to the entry time (t3), a moment profile (M) for a roller (3) of the roll stand (1) via a drive (4) driving a drivetrain (5). It controls the drive (4) during the period in accordance with the determined moment profile (M). The control device (7) determines the moment profile (M) starting from a starting state (x2), at the starting time (t2), of the drive (4), of the drivetrain (5) and of the driven rollers (3) of the roll stand (1) such that the driven rollers (3) of the roll stand (1) are acted on by the drivetrain (5) with the rolling moment (MW) at the entry time (t3) and rotate with a circumferential speed (vU) adapted to the rolling speed (vW).

This invention discloses a method for improving the rolling stability of thin-gauge strips in a continuous casting and rolling production line. The method includes a thin slab rolling mill; adjusting the mill rigidity; adjusting the thickness of the intermediate strip slab; installing a width measuring instrument at the exit of the fan-shaped section of the slab; continuously comparing the measured value with the actual value; replacing the actual measured value with a preset width value when the deviation obtained from the comparison does not meet the constraint conditions; reducing the downward pressure of the roughing mill to a preset percentage of the original downward pressure; adjusting the looper tension to a preset value; and after the strip is threaded at the tail end, the mill accelerates in segments according to a preset strategy with delay time intervals based on a delayed acceleration command. This effectively reduces the occurrence of issues such as strip deviation, steel accumulation, poor coil shape, tailing, and rolling damage during the production of thin-gauge strips.

This application relates to the field of reversible rolling mill control technology, and discloses a method, device, medium, and reversible rolling mill for strip shape control. The method includes: acquiring standard strip shape deviations and standard speed indicators at different positions of a standard strip at intervals, acquiring the corresponding standard strip adjustment methods and saving them as the Gth data entry; acquiring the current strip shape deviation and current speed indicator; acquiring the Gth data entry using the current strip shape deviation and current speed indicator, and calculating the similarity between the current strip shape deviation and the standard strip shape deviation; if the similarity is less than a set value, adjusting the current strip using the standard strip adjustment method of the Gth data entry; if the similarity is greater than the set value, selecting the current strip adjustment method based on the current strip shape leveling deviation value and the current values ​​of the four outer channels of the edge, according to the set strip adjustment method. This application can improve the response speed and control efficiency of the reversible rolling mill for current strip shape control.

This invention provides a high-performance uniform production method for high-strength pickled enamel steel using a straight-through rolling process. The chemical composition of the high-strength pickled enamel steel, by weight percentage, includes: C: 0.04~0.08%; Si: ≤0.05%; Mn: 0.20%~0.40%; P ≤0.020%; S: 0.01~0.02%; Al: 0.020%~0.040%; Ti: 0.030%~0.045%; N: 0.0030~0.0070%, with the remainder being Fe and unavoidable impurities. The resulting high-strength pickled enamel steel exhibits a yield strength difference (head, middle, and tail) ≤25MPa, an adhesion test grade of 1~2, and excellent enamel coating effect.

The embodiment of the application provides a method for improving the control of the intermediate wave in the rolling of a thin-gauge high-strength pickling plate, relates to the technical field of strip steel rolling production, and comprises the following steps: changing the work roll type of a rough rolling mill, optimizing the load distribution of each pass of the rough rolling mill, and ensuring that the load reduction amount of the last pass is not more than a set threshold; optimizing the rolling logic of a finishing rolling mill unit when rolling the intermediate slab of the strip steel based on the proportional crown, wherein the proportional crown is the thickness ratio of the intermediate slab of the strip steel to the crown of the intermediate slab of the strip steel; optimizing the real-time feedback logic of the bending of the finishing rolling mill; and improving the adjustment speed of the bending of the finishing rolling mill stand. The method can effectively solve the problem that the intermediate wave is prone to being generated in the finishing rolling process of the high-strength pickling plate, and accordingly improves the production efficiency and reduces the production cost.

Provided is a production method for a grain-oriented electrical steel sheet comprises: hot rolling a steel slab having a predetermined chemical composition, followed by annealing to obtain a hot-rolled and annealed sheet; cold rolling the hot-rolled and annealed sheet one time, or two times or more with intermediate annealing being performed therebetween, to obtain a cold-rolled sheet, followed by subjecting to primary and secondary recrystallization annealing, wherein in the cold rolling, a rolling reduction ratio is 80% or more at least one time out of the one time or two times or more, and a steel sheet temperature T0 (° C.) while a rolling rate is a set value R0 (meters per minute) and a steel sheet temperature T1 (° C.) while the rolling rate is less than or equal to 0.5×R0 satisfy a formula: T1≥T0+10° C.

This application relates to the field of cold rolling technology for metal sheet and strip, and discloses a cooling control method for a rapid warm rolling process in a rolling mill, as well as the resulting sheet and strip. The control method includes: acquiring the strip to be rolled and heating it to a set temperature; acquiring the strip thickness and total reduction rate, and setting the total number of rolling passes based on the thickness and total reduction rate; acquiring the rolling speed, and setting the inlet emulsion flow rate for each rolling pass based on the rolling speed; and setting the outlet emulsion flow rate for each rolling pass based on the rolling speed and the inlet emulsion flow rate. After the set temperature, total number of rolling passes, inlet emulsion flow rate, and outlet emulsion flow rate are all set, strip rolling begins. This application precisely controls the emulsion spray flow rate and determines the optimal inlet and outlet flow rate ratio at the mill inlet and outlet to avoid sheet shape quality problems caused by excessively high temperatures.

The application discloses a production method for improving control of large-size coil shape of a wire rod, and belongs to the technical field of iron and steel manufacturing. The method comprises a whole-process rolling procedure of hot-rolled wire rod: heating furnace adding, high-pressure water phosphorus removing, rough rolling, final rolling, on-line cooling, finishing rolling, on-line cooling, reducing-diameter rolling, wire laying, cooling control, coil collecting, finishing, packing, packaging, and warehousing. Through positioning of the head of the wire rod, the rolling speed is periodically changed in the whole rolling process, the wire laying machine swing period and the rotating speed are calculated in combination with the target wire diameter and the wire height, the wire diameter of the wire rod is periodically changed in the wire laying process, the large and small coils are staggered and uniformly distributed after the coil collecting, the required wire height is obtained under the condition of fixed wire rod weight, and the coil shape is regular after the packing. The application discloses a wire laying machine swing period calculation formula, is suitable for existing tooling equipment, effectively avoids the wire rod scratch and the problems of disorderly wire and knotting in the subsequent processing, satisfies the individualized requirements of different customers on the wire diameter and the wire height, and significantly improves the product quality and the production efficiency.

The application discloses a kind of pickling tandem rolling mill set rolling mill speed automatic control method, it is related to cold continuous rolling automation control technical field.The pickling tandem rolling mill set rolling mill speed automatic control method of the present application, if abnormal state constraint factor occurs in production line operation process, the effective cache amount of strip in loop is calculated in advance by rolling mill speed automatic control model, so as to judge the current optimal speed control mode of rolling mill, and implement automatic speed reduction operation to guarantee continuous, stable and efficient production, so that rolling mill operation is intelligent;When one or more conditions in rolling mill speed control conditions ① to ⑥ item determination condition are not satisfied, rolling mill speed reduction is executed;When condition ⑥ is satisfied, but one or more conditions in determination conditions ① to ⑤ are not satisfied, rolling mill entrance is reduced to 150mPm;When condition ⑥ is not satisfied, speed control strategy table is executed.

This application provides a two-splitting rolling process for Φ25 threaded steel bars, comprising: heating a steel billet; obtaining a rough-rolled intermediate billet from the heated steel billet after rough rolling; obtaining an intermediate-rolled intermediate billet from the rough-rolled intermediate billet after intermediate rolling; and sequentially deforming and splitting the intermediate-rolled intermediate billet using a vertical rolling pass, a pre-cut double-cut pass, a split double-cut pass, an elliptical pass, and a circular pass to obtain two-splitting rolled pieces; adjusting the finishing rolling speed according to the elongation coefficient and the real-time rolling temperature to complete the rolling process. This method employs a progressive pass combination, with three stages of control: vertical rolling pass initiation and splitting preparation, preliminary separation using the pre-cut double-cut pass, and final shaping using the split double-cut pass. Combined with a dynamic speed control system, it monitors the elongation coefficient and rolling temperature in real time, automatically compensating for changes in deformation resistance, allowing residual stress to be gradually released during deformation of the rolled piece, avoiding segregation problems caused by uneven temperature in traditional processes.

The application discloses a titanium-aluminum composite material with high interfacial bonding strength and high strength, and a preparation method and application thereof, and belongs to the technical field of titanium-aluminum composite materials. The titanium-aluminum composite material comprises aluminum layers and titanium layers which are alternately and laminatedly arranged. An intermetallic compound layer with a thickness of not more than 1 micrometer is arranged at the interface of the aluminum layers and the titanium layers. The tensile strength of the titanium-aluminum composite material is not less than 295 MPa, the elongation rate is not less than 15%, and the interfacial shear strength of the titanium layers and the aluminum layers in the titanium-aluminum composite material is not less than 130 MPa. The titanium-aluminum composite material is free of harmful brittle phase TiAl3 with excessive growth between the titanium layers and the aluminum layers, has high interfacial bonding strength, and has high tensile strength and elongation rate. The preparation method is simple in operation and can accurately control the thickness of each layer after compounding.

The application discloses a method for improving rolling efficiency of a low-carbon-equivalent 355MPa grade normalized rolled thick plate, and the method comprises the following steps: after a billet is heated by each heating section of a heating furnace, the billet surface temperature is reduced to 1000-1050 DEG C, and when the rolling rhythm is ensured and the billet surface temperature in the soaking section is in the range of 1000-1050 DEG C, the time when the billet is discharged is determined; the billet is rolled by one-stage rolling, the rolling pass number is controlled to be 2-4 passes in the cross rolling and spreading stage, the pass reduction rate is 8%-15%, and the rolling speed is controlled to be 2.0-2.2 m / s ‑1 ; the rolling pass number is controlled to be 4-8 passes in the longitudinal rolling stage, the pass reduction rate is 15%-36%, and the rolling speed is controlled to be 2.2-3.8 m / s ‑1 ; and the finish rolling temperature is controlled to be 860-900 DEG C. According to the method, the low-temperature characteristics of the billet after being discharged are utilized, the "temperature difference" characteristics of the billet in the thickness direction in each deformation stage are fully utilized, the double grain refining effects of recrystallization and large reduction grain crushing are realized, the grain size is more than 9 levels, the waiting time is saved, and the rolling efficiency is obviously improved.

The application discloses a production method of Q355ME wind power steel, and discloses related production processes and parameter control; the Q355ME wind power steel comprises the following chemical components in percentage by weight: C: 0.065-0.085%; Si: 0.3-0.4%; Mn: 1.4-1.5%; Nb: 0.025-0.035%; Ti: 0.008-0.016%; P: ≤0.017%; S: ≤0.005%; Ca: 0.0008-0.0020%; Als: 0.020-0.035%; O: ≤0.0035%; N: ≤0.0052%; and the rest is iron and inevitable impurities. The application aims to provide a production method of a yield strength 355MPa grade wind power tower structure steel plate with a thickness of 8-60mm, high production efficiency and stability, excellent mechanical properties, good plate shape and surface quality.

The application discloses a kind of surface oxide dust control methods for hot-rolled plate coil processing, belong to steel metallurgy technical field.The method includes: chemical composition control, add 0.10% to 0.18% chromium element in steel;Heating temperature control, billet discharge temperature≤1190℃;Rolling temperature control, rough rolling final rolling temperature 950-1050℃, finish rolling entrance temperature 850-900℃, coiling temperature 600-650℃;Cooling mode control, adopt "ultrafast cooling-laminar cooling" compound mode, after finish rolling with≥30℃ / s cooling to 600℃, again with≤5℃ / s cooling to coiling temperature;Rolling speed and descaling control, finish rolling last stand rolling speed increases ΔV≥0.3m / s, cooperate with pressure≥25MPa high pressure water descaling.The application is reduced to 8-15μm by micro Cr alloying and process synergic control, FeO proportion is promoted to more than 75%, significantly reduce oxide dust in the process of open flat processing, improve surface quality, have environmental protection and cost advantage.

The application provides a short-process preparation method of high-Mo nickel-based corrosion-resistant alloy plate, which comprises the following steps: (1) homogenization treatment and heating and holding treatment of an ingot; (2) hot rolling treatment of the ingot by adopting a reduction of more than 55% to obtain a hot-rolled plate; and (3) annealing treatment and pickling treatment of the hot-rolled plate. The short-process preparation method has the advantages of significantly improving production efficiency, saving energy and reducing carbon emission.

The present application belongs to the technical field of steel metallurgy rolling, and particularly relates to a rolling control method for improving length direction washboard waviness of medium-thick steel plate. The method comprises the following steps: step S1: judging whether to enable the function based on the target thickness of the steel plate obtained based on the last loaded pass, and enabling the washboard waviness improvement function if the target thickness is not greater than a set threshold; step S2: after the head of the steel plate is bitten by the rolling mill, the rolling mill is in the sledge control state within the sledge action length, and no intervention is made to the rolling mill; step S3: after the head of the steel plate passes through the sledge control area, the normal torque balance control function between the upper and lower motors of the rolling mill is closed, and the speed adjustment program is started; and step S4: the torque deviation of the upper and lower motors is monitored in real time, and when the deviation exceeds a preset safety threshold, the speed adjustment program is stopped and the torque balance control is restored. The method significantly improves the length direction flatness of the final product, and improves the yield and production efficiency.

The present application belongs to the field of metallurgy, and relates to a high-speed rod hub transmission control method. According to a PLC control signal, a large proportion, small integral and high dynamic characteristic control is adopted in the starting process of a hub motor through a speed regulator, and a small proportion, large integral and steady-state control is adopted in the braking process. When the rolling speed is high, additional torque is added on the main torque channel for real-time dynamic adjustment, so as to shorten the starting time. The present application first proposes dynamic setting of hub control process parameters, and sets the response hub motor control parameters according to the PLC signal in different stages. The present application first proposes a hub control model, additional torque is added on the main torque channel to improve the starting torque of the hub, suppress the current and improve the response speed of the hub motor. According to the operation characteristics of the hub equipment, an advanced control concept is adopted to control the fast response of the hub, so as to ensure the stable operation of the hub at a rolling speed of more than 45 m / s of the high-speed rod production line.

The application relates to the technical field of steel rolling, and discloses a method and device for improving the measurement accuracy of a rolling mill pressure head, a medium and an electronic device. The method comprises the following steps: acquiring the oil pressure of an oil pressure sensor on a hydraulic oil circuit of a rolling mill, and determining the rolling force of the rolling mill based on the oil pressure; controlling the main transmission of the rolling mill to rotate at a set speed, and step by step pressing the rolling mill against a plurality of set pressing force points; for each set pressing force point, acquiring the rolling force of the operation side and the transmission side of the rolling mill through the oil pressure sensor and the pressure head respectively; determining a correction parameter of the rolling force of the rolling mill based on the rolling force of the operation side and the transmission side of the rolling mill; judging the health state of the pressure head based on the rolling force of the operation side and the transmission side of the rolling mill; and if the pressure head is in an unstable state, correcting the rolling force measured by the pressure head based on the correction parameter. The technical scheme disclosed by the application can evaluate and correct the rolling force measured by the pressure head.