24results about "Mass flow control device" patented technology

The application provides a large-size tail section speed-up optimization control method for a wire rod, develops a reducing sizing machine, pinch rollers and a wire spooling machine relay speed-up function, and realizes automatic switching of different specifications and different speed-up modes. By using the new control method, the influence of the tail section speed-up on the finished product circle shape is eliminated, the production stability is improved, the restriction of the mechanical capacity of the reducing sizing machine, the pinch rollers and the wire spooling machine on the production of the super large-size product is reduced, the production efficiency is improved, the service life of the reducing sizing machine is prolonged, and the maintenance cost investment is reduced.

The present invention discloses a hot-rolled H-shaped steel including a web, a first flange plate, and a second flange plate, in which the difference in thickness between the first flange plate and the second flange plate, |T1-T2|, is greater than 0, and the ratio of the difference in area between the first flange plate and the second flange plate, |S1-S2|, to the area S1 of the first flange plate is less than or equal to 1, or the ratio of the difference in area between the first flange plate and the second flange plate, |S1-S2|, to the area S2 of the second flange plate is less than or equal to 1. The hot-rolled H-shaped steel of the present invention can meet the production requirements of various specifications in which the thicknesses of the flanges on both sides are not equal, and can also avoid the occurrence of side bending during the rolling process. The difference in the flow rate of metal per second of the flanges on both sides during the rolling process is controlled within a certain range, thereby stably producing hot-rolled H-shaped steel with the thicknesses of the flanges on both sides being not equal. The present invention further discloses a production method of hot-rolled H-shaped steel.

The invention provides a high-precision tandem cold mill second flow thickness control method which comprises the following steps: firstly, integrating an inlet / outlet second flow difference to correct a strip steel inlet speed, and pre-calculating a strip steel outlet thickness difference by using a second flow equation; compensating the speed difference between the inlet tension roller and the first rack, and correcting the second flow pre-calculation thickness difference by using the monitoring thickness difference; and finally, a self-adaptive PI controller is used for calculating the second flow thickness control quantity. According to the method, the error of the second flow of the inlet and the outlet and the speed difference between the inlet tension roller and the first rack are compensated, and the monitoring thickness difference correction is used, so that the high-precision outlet thickness difference value can be obtained. Proportions and integral parameters which change adaptively along with the speed and the response time of the adjusting mechanism are used to adapt to different working conditions, so that good control performance can be kept in the rolling process, and the overall precision of the second flow AGC is improved to a large extent.

The present application relates to the technical field of hot continuous rolling low carbon steel, in particular to a method for controlling the surface pitted scale defects of hot continuous rolling low carbon steel. 1) The temperature of the low carbon steel heating furnace is controlled at 1160-1200 DEG C; 2) according to the change of the target thickness of the product, the entry temperature of the finishing mill is controlled: if the target thickness is less than or equal to 2.2 mm, the entry temperature of the finishing mill is controlled at 1035-1060 DEG C; if the target thickness is greater than 2.2 mm, the entry temperature of the finishing mill is controlled at 1015-1040 DEG C; 3) the first rolling mill of the finishing mill is F1, and the Nth rolling mill is FN in turn, and the roll gap cooling water of F1-F5 is put in; 4) the hot rolling oil manifold and nozzle are installed at the outlet of the backup roll of F1-F5; 5) the high speed steel work roll is used for the rolling mill; 6) the water pressure of F1-F7 is controlled at 0.5-1.2 MPa; 7) the target value of the finish rolling temperature is controlled at 750-900 DEG C; 8) the cycle of the high speed steel work roll is controlled within 2-6 cycles; 9) the same batch of high speed steel work roll is avoided to be at the end period. The surface pitted scale defects of hot continuous rolling low carbon steel can be effectively controlled, and the surface quality of the strip steel is improved.

This invention relates to a method for controlling the cooling water volume of pre-oxidized high-speed steel rolls during the rolling of hot rolls, belonging to the technical field of control methods applicable to metal rolling mills. The method first calculates the target rolling pressure range using the rolling pressure recorded under n rolling plans for normal, non-pre-oxidized high-speed steel rolls. Then, it calculates the required cooling water volume for the pre-oxidized high-speed steel rolls. During the rolling of hot rolls with the pre-oxidized high-speed steel rolls, the rolling pressure is recorded and it is determined whether it falls within the target rolling pressure range. This determines whether the calculated cooling water volume remains unchanged. If it does, a new cooling water volume is recalculated, and this process is repeated until a suitable cooling water volume is selected. This method simultaneously correlates the roll thermal crown with both rolling pressure and cooling water volume. It judges and controls the change in roll thermal crown by whether the rolling pressure of the pre-oxidized high-speed steel roll during the rolling of hot roll material falls within the target rolling pressure range.

The invention belongs to the technical field of steel production management, and provides a method for reducing oil sludge in a rolling mill stand, which comprises the following steps: determining allowable flow ranges of strip steel at different thicknesses and rolling speeds, and constructing an allowable flow range reference library; analyzing the iron powder concentration change of a filter port of the filter system of the rolling machine under different emulsion flows, and determining the allowable maximum emulsion flow; according to the thickness of the strip steel section and the rolling speed, the allowable flow range corresponding to the strip steel section is extracted from the allowable flow range reference library, and is compared with the allowable maximum emulsion flow to judge whether the emulsion flow adjustment during strip steel section rolling is needed or not; if yes, determining an emulsion flow adjusting mode during rolling of the strip steel section, and if the flow value is limited and adjusted, determining a flow analysis range, and limiting an emulsion adjusting flow value of the strip steel section according to strip steel quality data and iron powder concentration corresponding to different emulsion flows, so as to reduce generation of oil sludge.

The present application relates to a kind of methods for controlling hot-rolled high-strength pickled plate scale defects, including using descaling impact test method, checking each trace complete on test special slab, lap is not superimposed, and the gap between impact mark is ≤2mm;Production plan is from at least the 10th block in cycle, and no more than the 55th block of high-strength pickled plate is arranged;Control the sum of high-strength pickled plate second heating section and soaking section time is 100-180min;High-strength pickled plate rolling time interval is controlled at 140-210s;High-strength pickled plate is descaled in all directions, at least one pass descaling water is arranged when rough rolling;The use cycle of finishing mill work roll is less than or equal to 2 times;Increase finishing rolling lubricating oil flow;The present application greatly reduces the residual amount of hot-rolled high-strength pickled plate scale, thereby improving the surface quality of high-strength hot-rolled pickled plate, and providing strong guarantee for subsequent pickling to improve surface quality.

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.

The invention discloses a control method for a roller lubricating device of a hot continuous rolling finishing mill group. The control method comprises the following steps that S1, whether strip steel reaches a finishing mill or not is detected; s2, the rolling force and the rolling mill speed of the finishing mill during steel biting are locked; s3, establishing a roller rolling force feedback control model and a rolling speed feedback control model of the finishing mill; s4, establishing a strip steel temperature characteristic compensation coefficient; and S5, the injection time sequence of the roller lubricating device is set. The invention aims to solve the problems of poor lubricating effect, insufficient lubrication and excessive lubrication of the finish rolling vertical roll and improve the edge quality of a hot rolling strip steel finished product (especially high-grade silicon steel).

This invention discloses a control method and related equipment for segmented roll cooling, relating to the field of roll cooling. The method primarily addresses the current issues of inaccurate and ineffective roll thermal crown control. The method comprises: obtaining the number of rolling blocks and variable compensation coils after work roll replacement on a target production line; determining a cooling water compensation value based on the number of rolling blocks and variable compensation coils after work roll replacement; and adjusting the RTC device based on the cooling water compensation value. The present invention is used for the control process of segmented roll cooling.

This invention discloses a material shape control method to improve the negative difference rate of three-section rebar. By adding a clamping device between the No. 2 shear and the rolling mill, the rolled piece enters the mill horizontally, thereby reducing torsion and improving stability. The roll pass is optimized to ensure that the center line cutting hole is larger than the edge line cutting hole, with a ratio of 1:1.25. Optimization is carried out on the cooling water pipes of the finished product and the rolls before the finished product, using an intelligent cooling control system to monitor and precisely control the flow rate, pressure, and temperature of the edge and center line cooling water pipes in real time. The edge line cooling water pipe uses a 1.5-inch inlet pipe and is equipped with a variable frequency water pump with a maximum flow rate of 50 m³ / h. The system is also equipped with a backup power supply to maintain cooling control for 30 minutes during power outages. During the rolling process, if the weight difference between the center line and the edge line exceeds a threshold, the K5 material shape is adjusted in time to ensure that the center line cutting hole is filled.

This invention provides an emulsion spraying and control system for a single-stand 20-roll reversible cold rolling mill. The first spraying zone is used for lubrication and cooling of the work roll gap; the second spraying zone is used for cooling the rolls between the intermediate roll and the work roll; the third spraying zone is used for strip cooling; the fourth spraying zone is used for strip cooling; the spray head in the third spraying zone is located between the work roll and the spray head in the fourth spraying zone; and the fifth spraying zone is used for cooling the back support roll. The left upper and lower spray beams of the first spraying zone share a first control path, and the right upper and lower spray beams share a second control path. The upper left and right spray beams of the second spraying zone share a third control path, and the lower left and right spray beams share a fourth control path. The left upper and lower spray beams of the third spraying zone share a fifth control path, and the right upper and lower spray beams share a sixth control path. The left upper and lower spray beams of the fourth spraying zone share a seventh control path, and the right upper and lower spray beams share an eighth control path. The four spray beams of the fifth spraying zone share a ninth control path.

The present application belongs to the technical field of steel production, and discloses a control method for foreign matter pressing into the surface of thin strip steel. 3 The control method comprises the following steps: (1) molten steel smelting control: controlling the oxygen blowing amount of the refining furnace to be 15-18 m 3 / h; controlling the total flow of the compressed air of the No. 3 hot box on the upper surface and the lower surface of the thin strip steel to be: when rolling the thin strip steel with a specification of 1.2 mm or above, the total flow of the compressed air is controlled to be lower than 100 m 3 / h; or when rolling the thin strip steel with a specification of 1.2 mm or below, the total flow of the compressed air is controlled to be not more than 350 m 3 / h. In addition, the control method further comprises (3) flow control of rolling oil: controlling the flow of the rolling oil in rolling to be not more than 150 cc / min on the upper surface and the lower surface of the thin strip steel, respectively.

The invention discloses an anti-slip control method and system for hot continuous rolling production of an ultrathin aluminum plate base. The anti-slip control method comprises the following steps that S1, roller surface modification is conducted, specifically, a CrAlN / TiN gradient composite coating is prepared through a physical vapor deposition technology; s2, a lubricating medium is configured and supplied, specifically, the oil film thickness and flow of the finish rolling section are precisely controlled through an intelligent lubricating system; s3, setting a rolling process procedure: designing and executing a reduction rate gradient distribution strategy from rough rolling to finish rolling based on the characteristics of a hot continuous rolling unit; and S4, dynamic monitoring and adjustment are conducted, specifically, when it is detected that the rolling force fluctuation exceeds a preset threshold value, the reduction rate and the rolling speed of the target rack are automatically and finely adjusted through a rolling force-speed linkage control model. According to the collaborative anti-slip control method and system, the special roller surface, the stable lubrication interface, the matching reduction schedule and the dynamic response mechanism are integrated, the slip frequency is fundamentally reduced, strip surface scratches and roller aluminum sticking are reduced, and the product surface quality and the yield are improved.

The invention relates to the technical field of titanium plate rolling, in particular to a method for controlling head buckling and head warping of a titanium plate in a rough rolling process and a titanium plate intermediate billet. The titanium plate intermediate blank is prepared by the method. The method comprises the steps that a titanium plate blank is heated, so that the temperature of the upper surface of the titanium plate blank is 10-20 DEG C higher than that of the lower surface of the titanium plate blank; conveying the titanium plate blank into a rough rolling process, and carrying out multi-pass rolling treatment to obtain a titanium plate intermediate blank of which the buckling head and the warping head are controlled; and according to the buckling head size condition occurring in the rolling treatment of each pass, the reduction level of the cooling water flow of the roller way during the rolling treatment of the next pass is controlled in time, or according to the warping head size condition occurring in the rolling treatment of each pass, the increase level of the cooling water flow of the roller way during the rolling treatment of the next pass is controlled in time. According to the method, rough rolling head buckling and head warping can be effectively controlled, and the surface quality and the production stability of the titanium material are improved.

The invention discloses a control method for an inlet vertical roll lubricating device of a hot continuous rolling finishing mill. The control method comprises the following steps that S1, a vertical roll rolling force feedback control model is established; s2, establishing a rolling speed feedback control model; s3, establishing a strip steel billet center line deviation feedforward control model; s4, establishing a strip steel temperature characteristic compensation coefficient; and S5, the injection time sequence of the vertical roll lubricating device is set. The invention aims to solve the problems of poor lubricating effect, insufficient lubrication and excessive lubrication of the finish rolling vertical roll and improve the edge quality of a hot rolling strip steel finished product (especially high-grade silicon steel).

The application provides a method for improving surface color difference of hot-rolled aluminum plate strip, comprising the following steps: carrying out a butter experiment on the surface of a roller to verify the blocking condition of an emulsion nozzle; separately cleaning the emulsion nozzle that appears to be blocked; and controlling the emulsion injection amount during the rolling of the hot-rolled aluminum plate strip. In the method for improving surface color difference of hot-rolled aluminum plate strip provided in the application, the butter experiment is used to verify the uniformity of the emulsion nozzle injection, and the emulsion injection amount is controlled, so that the surface color difference can be reduced.

The invention discloses a three-way valve control type cooling method among finishing mill groups, which is characterized in that inter-machine cooling water paths independent of roller box panel cooling water paths are arranged among the finishing mill groups, and three-way valves are mounted on the inter-machine cooling water paths; the starting action triggering logic of the three-way valve comprises the following steps: receiving a rolled piece steel signal detected by an upstream pre-finish rolling last frame; and in combination with the speed v of the rolled piece, the distance L from the steel signal detection point to the cooling water injection point and the compensation length D of the head of the rolled piece, according to the formula T = (L / v) + delta t and delta t = D / v, the set delay T is calculated, and the three-way valve is opened after the set delay T. In this way, the three-way valve is driven to be opened by setting time delay, cooling water is opened after the tip end of the head of a rolled piece passes through a cooling injection point and when a head body reaches the cooling injection point, an inter-machine cooling water channel independent of a roller box panel cooling water channel is arranged between finishing mill groups, and the cooling effect of original roller box panel cooling water on a roller ring rolling groove cannot be affected; and the temperature rise of the rolled piece during high-speed finish rolling is better controlled.

The invention relates to a method for operating an annealing furnace (200) for annealing a metal strip (100). According to the method, at first at least one desired target material property ME Soll is specified for a point or a section of the metal strip (100) after it has passed through the annealing furnace (200). Additionally, information E regarding the metal strip is provided upstream of or in the annealing furnace. A target temperature distribution T Soll and / or a target speed V Soll for the metal strip in the annealing furnace is then calculated with the aid of a computer-assisted model as a function of the target material property and said information. The target temperature distribution and / or target speed thus calculated are / is then set in the annealing furnace (200) in order to change the material property of the metal strip downstream of the annealing furnace into the desired target material property ME Soll.

The invention particularly relates to a control method for preventing stripping water of all racks of a hot finishing mill, and belongs to the technical field of keeping rollers in an effective state during metal rolling. According to historical finish rolling information of all strip steel stored in four-roller finish rolling, the strip steel is divided according to steel types, widths and thicknesses, and an anti-stripping water opening strategy set of all racks under the condition that the surface quality and the finish rolling temperature of the strip steel with different steel types, widths and thicknesses are guaranteed at the same time is established; when the strip steel to be subjected to finish rolling enters the four-roller finishing mill, the appropriate anti-stripping water opening strategy of each rack can be selected only by judging the steel type, width and thickness of the strip steel to be subjected to finish rolling, so that the surface quality of the strip steel to be subjected to finish rolling can be ensured without influencing the finish rolling temperature under the washing of the anti-stripping water of each rack; and the contradiction between the surface quality and the finish rolling temperature caused by fixed opening and closing of anti-stripping water of each rack according to the maximum flow in the prior art is overcome.

The application discloses a kind of thick plate rolling mill high-pressure turbid water system energy-saving control system and method, belong to metallurgical production line energy-saving field.The system includes monitoring unit and control unit;Monitoring unit is used to obtain equipment system information and then pass to control unit, and receives the control instruction sent by control unit to control controlled object;Control unit is used to analyze and judge according to the information obtained by monitoring unit, and sends control instruction.The application combines the information of rolling line and water supply system, can reduce, even eliminate the invalid energy consumption loss caused by pressure relief mode on the side of rolling line, also considers the actual output situation of water supply side, ensures reliable water supply under the condition of information interruption between rolling line side and water supply side.Due to the cascade control mode during rolling, the dynamic economic demand of water supply system to rolling mill for cooling water can be quickly responded under the condition of ensuring reliable water supply, which ensures high tracking accuracy and excellent system stability.

The present invention discloses a Stelmor variable air volume cooling method for coil rolling, which belongs to the technical field of hot-rolled ribbed steel bar rolling. The present invention solves the problem that the existing method cannot eliminate the non-cooling section at the head. By calculating the time points when the coil head arrives at and leaves each cooling section, the steel signal of the head entering the pinch roller is obtained and the timing is started. When the start time of the first section fan frequency increase is reached, the fan frequency of the cooling section is increased; when the start time of the first section fan frequency increase is ended, the fan frequency of the cooling section is adjusted to the original frequency; and the fan frequency is increased according to the time point when the first coil arrives at the second cooling section, and so on; through the Stelmor fan variable air volume control, the air cooling intensity of the coil head that is not penetrated by water is increased, the influence of the non-water penetration on the mechanical properties of the coil head and the coil non-cooling section are eliminated, and the yield rate is improved.

The present application discloses a method for predicting the cooling flow of a single group of headers based on the ETR model, which belongs to the field of hot rolling cooling technology. The method comprises: collecting post-rolling cooling data in real time and extracting characteristic data related to the cooling flow of a single group of headers, establishing a database to train the ETR model after pre-processing, determining the number of optimal trees, establishing an optimization model through grid search hyperparameter combination, selecting appropriate indicators to evaluate the applicability of the optimization model according to actual application conditions, and dynamically guiding the cooling process procedures in real time. The prediction method of the present application has a high degree of automation, which can not only realize the rapid and accurate prediction of the cooling flow of a single group of headers, but also shorten the response time of the overall cooling system, effectively save production costs, and has good prospects for industrial application.

Rolling cassette (10) for rolling a ribbed metal wire (100), comprising: at least two opposing rollers (12, 13, 14) defining between them a passage channel (15) for said metal wire (100) along a central axis (X), at least one measuring device (19) disposed downstream of said passage channel (15) and configured to detect at least one physical quantity (D) of said metal wire (100), and at least one actuator (18) configured to vary a current distance (gl, g2, g3) of said rollers (12, 13, 14) with respect to said central axis (X).