A kind of control method and device for looper of hot continuous rolling finishing mill
A technology of finishing rolling unit and control method, applied in the direction of tension/pressure control, etc., which can solve problems such as surface scratches, affecting the output and quality of rolling lines, and large weight per unit color temperature, and achieve the effect of avoiding scratches
Active Publication Date: 2022-07-19
PANGANG GRP XICHANG STEEL & VANADIUM CO LTD
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Problems solved by technology
However, since the distance between the throwing rolling mills is changed from 5 meters to 10 meters, and because the throwing rolling is of thick specifications, the weight per unit color temperature is relatively large. Frequent contact between the strip steel and the rear panel of the throwing rack
Scratch defects on the surface, after scratch defects, the rolling line needs to stop rolling and pull out the rolls, and polish the back plate, and the scratched rolls need quality repair treatment, which will seriously affect the output and quality of the rolling line, so it is necessary to control the scratch defects
Method used
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Embodiment Construction
[0031] The core of the present invention is to provide a control method and device for a looper of a hot continuous rolling finishing mill, which can effectively avoid the strip steel finishing rolling scratches without increasing the cost.
[0032] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.
[0033] An example of a control method for a looper of a hot tandem finishing mill set provided by the present invention is as follows: figure 1 shown, figure 1 It is a schematic diagram of an em...
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The present application discloses a control method for a looper of a hot tandem finishing rolling mill, which includes increasing the rolling tension of the upstream stand before rolling; After the preset time, the angle of the looper of the throwing frame is increased to the first preset angle; when rolling the tail, after the steel is thrown from the upstream frame of the throwing frame, the looper angle of the throwing frame is lowered to the second preset angle Angle; when rolling the tail, after the steel is thrown from the downstream frame of the throwing frame, the looper angle of the throwing frame is lowered to the original position. The control method for the looper of the hot continuous rolling finishing line provided by the present invention can effectively avoid the strip steel finishing rolling scratch without increasing the cost. The present invention also provides a control device for a looper of a hot tandem finishing rolling mill, which has the same advantages as the above-mentioned control method for a looper of a hot tandem finishing mill.
Description
technical field [0001] The invention belongs to the technical field of rolling surface quality control, in particular to a control method and device for a looper of a hot continuous rolling finishing mill. Background technique [0002] In the production process of hot strip rolling, the looper device is an important part of the tension control in the rolling process. The speed of the upstream frame enables the speed of the main drive to be adjusted quickly and accurately, corrects the deviation of the belt speed, avoids the fluctuation of the width and thickness of the strip due to tension fluctuations, and ensures normal rolling production. In the case of drop rolling, the looper of the drop stand does not participate in the tension control, that is, the rolling process does not act when it is at the initial position, and the tension is controlled by the looper upstream of the drop stand, and the position of the looper is 10 ° reference position, the strip tension is contr...
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IPC IPC(8): B21B37/50
CPCB21B37/50
Inventor 李卫平杨程刘勇李博儒徐吉利
Owner PANGANG GRP XICHANG STEEL & VANADIUM CO LTD