86results about "Mass flow control device" patented technology

The invention provides a steel drawing control method and device for a hot rolling production line, and relates to the technical field of steel hot rolling. The method includes the steps that control signals of the hot rolling production line are monitored, operation time of technological processes on the hot rolling production line is obtained, and scheduled time from the moment when a first plate blank is drawn out of a heating furnace to the moment when a second plate blank is drawn out of the heating furnace is determined; experience operation time of the technological processes corresponding to varieties of the first plate blank and the second plate blank is obtained from a plate blank technological process database; experience time from the moment when the first plate blank is drawn out of the heating furnace to the moment when the second plate blank is drawn out of the heating furnace is determined; preferred drawing time of the second plate blank is determined according to the scheduled time and the experience time; and the second plate blank is drawn out of the heating furnace according to the preferred drawing time of the second plate blank. Through the steel drawing control method and device, the problems that since the steel drawing rhythm of the hot rolling production line is controlled through manual judgment at present, the idle running time of equipment is prone to being long, product quality is affected, and loss of the equipment and loss of power are caused are solved.

The invention provides a flow control method for the rolling temperature of a hot rolled steel strip and belongs to the technical field of rolled steel automatic control. The method comprises: reading plate blank PDI data, equipment parameters and rolling temperature model parameters, and extracting the actual measurement values of pyrometers when the steel strip reaches a finish rolling inlet and a finish rolling outlet; determining the given configuration and flow of the material specification of beginning valve and headers; according to the given flow and the rolling temperature model of each group of headers, determining the convective heat transfer coefficient of each group of headers; according to the rolling temperature model, calculating total flow required by cooling from the finish rolling outlet to a rolling inlet; determining total valve opening number required by cooling, and sending the set configuration to a level I basic automation executor; and carrying out feedback calculation according to the actual rolling temperature, regulating the opening and closing state of headers in a fine tuning zone, and ensuring a target rolling temperature. The method can stably control the rolling temperature index, ensure that the first block of an another specification of strip steel and a thick specification of strip steel can stably pass, improve the rolling temperature hit rate and improve the quality performance of a product.

The invention discloses a method for realizing flow per second balance among hot rolling continuous mill stands through rolling mill speed compensation, relates to the field of hot-rolling production process control, and aims to solve the problem of flow per second imbalance in the head wearing process of a hot rolling strip steel. The practical roll speed for finish rolling of each frame and the roll speed regulating quantity required by loop control is acquired from a level 1 computer according to the regulating process of the roll speed for finish rolling of each frame required by loop control in a threading process, specification-classifying self-adaptive learning is performed on the change rate of the roll speed required by the loop control according to steel type*thickness*frame, and the roll speed is corrected by adopting a latest learning coefficient during setting calculation of a next roll of strip steel in order that the flow per second among the finish-rolled frames tends to be balanced. By adopting the method, the phenomena of large loop rise or no loop rise, finish rolling steel scrap, width reduction and the like can be reduced, and the rolling stability of a finish rolling process is improved remarkably.

The invention discloses a current tracking method for rolling line production abnormity. The current tracking method mainly comprises the steps that at the time when the production state is just established, a rolling line monitoring system automatically collects and analyzes current values of motors of all rolling mills, a control interval target value of the current is automatically set according to the maximum limit value and the minimum limit value of the current values and serves as the judgment standard, the current under the subsequent stable-state production condition is checked, if the value of the current of a certain motor frequently exceeds the interval target value, then it means the corresponding rolling mill on a rolling line has production abnormity, an alarm system is started at the same time to remind site operation personnel to deal with the production abnormity in time, and otherwise, production is normal.

The invention discloses hot-rolled H-shaped steel, which comprises a web plate, a first flange plate and a second flange plate; the difference value T1-T2 between the thickness value of the first flange plate and the thickness value of the second flange plate is larger than 0; the ratio of the area difference S1-S2 of the first flange plate and the second flange plate to the area S1 of the first flange plate is not larger than 1, or the ratio of the area difference S1-S2 of the first flange plate and the second flange plate to the area S2 of the second flange plate is not larger than 1. According to the hot-rolled H-shaped steel provided by the invention, the production requirement that the flanges on the two sides of various specifications are different in thickness can be met, meanwhile, lateral bending in the rolling process can be avoided, the metal second flow difference of the flanges on the two sides in the rolling process is controlled within a certain range, and therefore the hot-rolled H-shaped steel with the flanges on the two sides being different in thickness is stably produced. The invention further discloses a production method of the hot-rolled H-shaped steel.

The invention discloses a control method for reducing the transverse thickness difference of hot-rolled strip steel. Rolling control process parameters are designed by control over the thickness of acontinuous casting machine plate blank, configuring of finish rolling high-speed steel, roller cooling, the working roller channeling stroke, the vertical roller side pressure and the oil mass of rolling oil, so that the purpose of reducing the transverse thickness difference of the hot-rolled strip steel is achieved. Transverse thickness plate shape indexes of hot-rolled silicon steel raw materials can be remarkably increased, the silicon steel sheet 7u intra-plate difference precision is improved from 90% to 93%, and the 5u intra-plate difference precision is improved from 40% to 80%. On thepremise of guaranteeing the plate shape indexes, the rolling period is prolonged from 800 tons to 1,800 tons, and the roller consumption during silicon steel rolling is remarkably reduced.

The invention provides a grease lubrication system and method of a roller for magnesium alloy rolling. The grease lubrication system the roller for the magnesium alloy rolling comprises a grease sprayer, the grease sprayer comprises a first grease box, a second grease box, sprinklers and a gas storage tank; the first grease box is connected with a plurality of sprinklers through a first oil distributor; the second grease box is connected with a plurality of sprinklers through a second oil distributor; the first grease box is connected with the second grease box; the first grease box and the second grease box are separately connected with a control cubicle; the gas storage tank is connected with a plurality of sprinklers; and each sprinkler is connected with the gas storage tank and the first oil distributor, or each sprinkler is connected with the gas storage tank and the second oil distributor. The grease lubrication system and method of the roller for the magnesium alloy rolling creatively uses grease lubrication to lubricate magnesium alloy rolling and overcomes the problems when using lubricating oil and has the advantages that uniform in distribution, stable in performance, low in usage amount, slow in influence on the roller temperature, and convenient to lubricate the lower surface of an magnesium plate without worrying about recycling at the same time.

The invention discloses a cooling device for a rolling mill. The cooling device comprises a water tank, a water inlet pipe, a driving device, an upper side cooling device and a lower side cooling device; the upper side cooling device is used for cooling the upper surface of a hot-rolled steel plate steel strip in a cooling section; the lower side cooling device is used for cooling the lower surface of the hot-rolled steel plate steel strip in the cooling section; each of the upper side cooling device and the lower side cooling device comprises water inlet branch pipes, a flow dividing device, a plurality of rows of cooling water pipes and nozzles; and the water tank is connected with the water inlet pipe, the water inlet pipe is provided with the driving device, the flow dividing device is arranged between the water inlet pipe and the water inlet branch pipes, the water inlet branch pipes are connected with cooling water pipes, the cooling water pipes are perpendicular to the running direction of the hot-rolled steel plate steel strip, and cooling water pipe bodies are provided with the multiple nozzles. The cooling device guarantees the cooling uniformity of the rolling mill and is good in cooling effect.

The invention relates to the technical field of lubricating systems, in particular to a method and device for monitoring the oil feeding amount of an electromagnetic oil feeding system. The method comprises the steps of acquiring the theoretical oil adding amount of the electromagnetic oil feeding system in unit time, wherein the electromagnetic oil feeding system comprises a plurality of lubricating points; acquiring an oil amount difference value between the actual oil adding amount and the theoretical oil adding amount of the electromagnetic oil feeding system in unit time; according to the oil amount difference value, judging whether an oil amount anomalous event occurs or not; if the oil amount anomalous event occurs, judging whether a pressure drop anomalous event occurs on each lubricating point or not; and determining the lubricating point with the pressure drop anomalous event occurring as a fault lubricating point. According to the method and the device for monitoring the oil feeding amount of the electromagnetic oil feeding system provided by the invention, the fault lubricating point with an oil leaking fault occurring can be accurately determined, the waste of oil grease is avoided, and the oil feeding amount of the electromagnetic oil feeding system is effectively monitored.

The invention discloses a control method for surface color difference of precision stainless strip steel. The control method comprises the steps: S1, selecting materials; S2, performing rolling of thefirst rolling process; S3, carrying out rolling of the finished product rolling process; and S4, conducting degreasing cleaning on a steel coil obtained after rolling of the finished product rollingprocess is completed. By means of the rolling mode of completely removing a pickling passivation film, a precision surface with the uniform and consistent surface is obtained in the subsequent machining process, and therefore the defects that removing of the pickling passivation film on the surface of a steel coil raw material is poor, the surface color difference is large, and roughness is unevenare overcome.

A method for controlling a roller line, preferably a cold roller line, which has one or more roller stands each with two working rollers, which form a roller gap, through which a roller band is transportable. One or both working rollers can shift relative to the other, so that the roller gap is adjustable. The method includes making available a reference speed, which is a parameter for controlling the roller line, measurement of speed of the roller band before the inlet into the roller gap, measurement of the thickness of the roller band before the inlet into the roller gap, and adjustment of the roller gap of one or more roller frames in the roller line on the basis of measured speed and thickness before the inlet into the roller gap as well as the reference speed.

A slit plant comprises a rest bar (14), for regulating the transversal position of an inlet guide to the moulder unit (12), a rolling unit for reducing the billet to a rolled section having two sections, a cutting box (13) for separating the two sections into two separate strands, one or more rolling units for rolling the two strands (1, 2), pairs of speed and/or section measurers (20, 21) downstream of the cutting box (13), a shear (15). The method for controlling the plant provides measuring the rolling speeds V1 and V2 of each of the two strands (1, 2) and/or of the division step respective sections A1 and A2 of the two strands (1, 2) downstream of the cutting box (13) by means of pairs of measurers; detecting the lengths of the two strands (1, 2) and calculating the difference in length thereof, based on which the plant, in a successive feedback step, is activated to decrease the difference in length between the two strands (1, 2).