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

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 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.