31results about How to "Improved Width Control Accuracy" patented technology

The invention relates to a method for producing high-strength packing steel band. Wherein, the inventive device comprises material preparer, induction heating furnace, end cutter, high-pressure water dephosphorize device, eight thermal rollers, one cold roller, middle cooling section, wide closed controller, thickness closed controller, movable sleeve, coater, and coiler; and the method comprises: preparing materials, induced heating, cutting end, removing phosphor, thermally rolling, controlling width, cooling, cold rolling, coating, coiling, while it can add welder and additive heater. In the production, the temperature of heating furnace should be controlled accurately, and the cooling speed should be controlled. The inventive steel band has high quality while the width accuracy is 0-1mm, and its cost is low.

The invention discloses a computer model control method for the thickness of a hot-rolled product. The method is a method for conducting classified reading and storing on the rough rolling broadeningstudy value according to the steel ball, the product thickness, a rough rolling machine, the width rolling reduction and the inlet thickness. Compared with the prior art, the computer model control method has the beneficial effects that the rough rolling broadening study value is classified according to the steel ball, the product thickness, the rough rolling machine, the width rolling reduction and the inlet thickness, the relevance between various factors and the width variation in the classifying method is obvious and is not affected by the rough rolling pass combination manner and the product thickness, the rough rolling broadening study value fluctuation range is obviously reduced, the method is suitable for production of products with various incoming material plate slab thicknesses,the product width control precision can be effectively improved, and therefore the generated waste product cutting-off rate and cost losses are reduced.

The invention relates to a hot-rolled wedge-shaped blank strip steel width control method. The control method comprises the steps that the rough rolling objective and load distribution are completed according to the width of an incoming material of a large head at first; width reduction of all passes of a small head is determined according to the outlet width objective, determined by the large head, of all passes; and reduction is controlled through the large head and the small head of a plate blank, an on-site connection control curve is subjected to long-stroke control, and finally, rectangular control over the plate blank is achieved. According to the control method, the control precision is greatly improved, and the problem that the overall control precision of the width of a plate blank in an existing control method is not high enough is solved.

The present invention discloses a dynamic feed-forward control method for rough rolling width. Due to inaccurate rough rolling incoming material information, head and tail position tracking errors in the strip rolling process, etc., it will be difficult for the traditional width control technology to eliminate all widths. or locally large deviations. The invention utilizes the width measurement data of the middle pass of rough rolling to dynamically identify the width loss of the full length of the strip steel, adopts the multi-point setting control method of the full length, and compensates the width loss situation in the subsequent passes as much as possible, thereby solving the problem of strip steel strip width loss. The problem of unevenness in the entire length direction can be solved, thereby significantly improving the precision of hot rolling width control.

The invention belongs to the technical field of hot rolling production and control, and provides a method for controlling the width of hot rolling strip steel. Width-measuring devices are additionally arranged at the front and the back of a vertical rolling mill of width-controlling equipment, width data of strip billets at the front and the back of a horizontal mill are collected in real time, the real-time width data are transmitted to a data acquisition system before the strip billets enter the mill, and the data acquisition system transmits the width data to a model system; the model system compares the width data acquired in real time with predicted data predicted by a model, and then determines whether width control is corrected or not, if width disturbance is large, width open loop feedforward control is carried out at first, after the belt billets leave the width-controlling equipment and the horizontal mill, mill rear width detection equipment sends corresponding data to the model system, the model system carries out calculation again, on-line control of a vertical roll is achieved through basic automation, and therefore closed loop feedback control is formed. Width detection is carried out on a plate billet at first before the plate billet enters the width-controlling equipment, dynamic correction is carried out on basic automation system control equipment, and therefore the width disturbance is reduced, and width feedforward and feedback dynamic control is realized.

The invention relates to a rough rolling width control method of a plate blank. According to the rough rolling width control target, firstly, the pass of rolling reduction needing to be fixed by a vertical roll and the rolling reduction of the pass are determined according to needs; then, starting from the last rolling pass of the vertical roll, the inlet width of the vertical roll is reversely pulled to be used as the target width of the previous pass or several passes according to the rolling reduction, and vertical roll loads of one or more passes is distributed reversely; finally, the restof passes of the vertical roll is subjected to forward load distribution; and after the plate blank completes rolling of every pass, rolling recalculation is started, and the rolling reduction of thevertical roll is re-set according to newest production information. According to the method, the measured value generated after rolling of the plate blank can be utilized more effectively, manual intervention of operation workers can be greatly reduced, the width control precision can be obviously improved, and the problem that the width control precision of a plate blank is low due to manual intervention in an existing rough rolling width control method is solved.

The invention relates to an automatic control method for width of steel strips during cold rolling, and belongs to the technical field of automatic control. The method includes: establishing forecasting models for width of exit steel strips for each stand; detecting width measured value at each position in the longitudinal direction of hot-rolled steel strips from an entry of a cold rolling unit in real time; calculating the differences between the measured values and preset values of width of the hot-rolled steel strips, and obtaining width variation of the hot-rolled steel strips to be eliminated by each stand; performing length position tracking on the hot-rolled steel strips from the entry of the cold rolling unit to obtain predicted values of exit width variation of the unit; determining real-time compensation of plate-shaped regulating mechanism of the No. m stand by changing compensation value of the plate-shaped regulating mechanism of a rolling mill of the stand in real time; according to the real time compensation of the plate-shaped regulating mechanism of each stand, performing feedforward control for exit width of each stand, and timely eliminating fluctuation of the width of the hot-rolled steel strips and influence on width of exit steel strips at the last stand by rolling technology parameter variation of each stand to improve width control precision of cold-rolled steel strips and stability of cold-rolling production process.

The invention provides a device for tracing and detecting an interior plate blank head position of a fixed width machine. The device for tracing and detecting the interior the plate blank head position of the fixed width machine comprises a fixed width machine control PLC and a fixed width machine first-level control system connected with the fixed width machine control PLC; the input end of the fixed width machine control PLC is connected with a main transmission motor current signal, a pressing die size, and an inlet pinch roller pressure signal. The fixed width machine control PLC comprises a filtering module, a counting module, a plate blank head position calculating module and a communication module; filter shaping is conducted on the main transmission motor signal by the filtering module; the number of impulses of the main transmission motor current signal is accumulated by the counting module; the plate blank head position is calculated by the plate blank head position counting module, and the calculation formula is a plate blank head position value=28.96m+the number of the impulses of the main transmission motor current signal*the pressing die size; the plate blank head position value is transmitted to the fixed width machine first-level control system in real time by the communication module; the filtering module judges monitored currents, and the impulses are effective when the currents are larger than or equal to 4000A every time.

The invention provides a method for improving the strip steel width control precision and relates to a method applicable to control of the steel strip width. In order to overcome defects in the prior art, the method for improving the strip steel width control precision is provided. The method for improving the strip steel width control precision comprises the following steps: a PDI width tolerance is acquired; a width tolerance factor is formed through the PDI width tolerance; and the width tolerance factor and a width compensation value are combined to form a model control width deviation.

The invention relates to a device and method which are specially suitable for metal rolling mills or processed products of the metal rolling mills, and especially relates to a control method for preventing strip breaking during a thin steel strip cold rolling process and especially a thin steel strip cold continuous rolling process, and is used for a rolling process control system of multi-stand old continuous rolling machine sets and single-stand cold rolling machine sets. By means of steel strip width detectors arranged on an inlet and an outlet of a machine set, the width of the steel strip in front of the machine set and the width of the steel strip on the back of the machine set are detected in real time, and the reduction rate of the steel strip width is determined; and according to the deviation of the reduction rate of the steel strip width, the compensation quantity of a plate-shaped adjusting mechanism is determined. According to the invention, through an existing computer rolling process control system of the cold rolling machine set, the compensation of the plate-shaped adjusting mechanism is achieved, the detection technology is mature, the accuracy is high, the equipment investment cost is low, strip breaking during the thin steel strip cold rolling process can be prevented, the stability of the cold rolling production process can be improved, and the rolling yield of the cold rolling production process can be risen, the production cost is reduced, at the same time, the control precision of the cold rolling steel strip width can be improved to some extent.

In view of the fact that conventional rough-rolling vertical rollers adopt the method of empty pass during reverse rolling without carrying out width control on the strip steel, the method of the present invention is to adopt the small rolling force control mode for the vertical rollers during the rough-rolling reverse rolling. The vertical roll is rolled and the roll gap is measured, and the slab width is calculated according to the roll gap model. Use this width to re-set the rough rolling width and learn the widening model. The method can solve the problem that accurate width measurement data cannot be obtained in the middle pass of rough rolling at present, and accurately provide the slab entrance width re-set and calculated during the rough rolling process, thereby improving the final rough rolling width accuracy.

The invention belongs to the technical field of steel rolling and discloses a method for conducting width model control by using a side guide plate roll gap value. The method includes the following steps that outlet and inlet roll gap values obtained after a front side guide plate of a width fixing machine is aligned, a difference value is calculated, under the condition that the difference value is smaller than a preset deviation value X, the average value of the outlet and inlet roll gap values serves as the side guide plate roll gap value; the side guide plate roll gap value is compared with a width measurement value of a front width measurement instrument of the width fixing machine, the absolute value of a difference value is calculated, and under the condition that the absolute value of the difference value is smaller than a preset deviation value Y, the side guide plate roll gap value serves as the actually-measured width value; and the actually-measured width value is compared with a slab benchmark width value, the absolute value of a difference value is calculated, and under the condition that the absolute value of the difference value is smaller than a preset deviation value Z, the actually-measured width value is used for conducting width model control. Due to the fact that the inlet and outlet roll gap values of the guide plate on the aligned side when a slab passes through the front side guide plate of the width fixing machine are collected, the reasonable preset deviation values are set, measured abnormal width values are filtered, and therefore the width model control precision can be effectively improved.

The invention relates to a hot rolling width model fast dynamic self-adapting method. According to the main control principle of the hot rolling width model fast dynamic self-adapting method, the model leaning strategy is changed, the data collecting method is improved, one time of model self-adapting leaning is conducted through width detecting equipment needed the overall pass through of a strip steel formerly, and the methods that leaning is conducted when part of the strip steel passes through the width detecting equipment, and repeatedly dynamic learning strategy is possessed are replaced. The hot rolling width model fast dynamic self-adapting method have the advantages that the problems that the width self-adapting correction is lagged in real production control, the phenomenon of width over-control occurs, and the width control deviation occurs in high-speed rolling pacing are solved, and the subsequent strip steel control precision is improved.