Automatic deviation-rectifying method and device for band steel uncoiling

Abstract

The invention relates to the field of cold-rolled steel, in particular to an automatic deviation-rectifying method and device for band steel. The automatic deviation-rectifying method for band steel uncoiling comprises the steps that the opening degree of a side guide plate is made maximum; the position of a steel coil is detected, so that the position deviation value is obtained; and when a band head passes the side guide plate, the side guide plate is used for clamping the band steel and pushing the band steel back to the center of a unit, and then deviation of the band steel is rectified. The automatic deviation-rectifying device for the band steel uncoiling comprises a shifting oil cylinder, a servo valve, a pair of distance sensors, a PLC and the side guide plate. The servo valve is connected with the shifting oil cylinder in a controlling manner. The PLC is connected with the servo valve in a controlling manner. According to the automatic deviation-rectifying method and device for the band steel uncoiling, on the premise of not changing the overall structure of equipment, band steel deviation caused by poor centering of a walking beam, deviation of a coil feeding center line of a trolley, the wave shape of the band steel, cambering and other factors can be effectively controlled, the adverse impact on the follow-up processes of edge shearing conducted by a disk and rolling conducted by a rolling mill is eliminated, and therefore the unit can conduct production stably and smoothly; and the structure is simple, installation is convenient, and the practicability is high.

Description

technical field [0001] The invention relates to the field of cold-rolled steel, in particular to an automatic deviation correction method and device for strip steel. Background technique [0002] During the production of the cold tandem rolling mill, the strip tends to deviate. When the deviation is serious, it will rub against the equipment, causing damage to the equipment and tearing of the strip. There are many reasons for the deviation, such as: poor alignment of the walking beam, deviation of the center line of the trolley, strip steel wave shape, sickle bend, etc. When the deviation strip arrives at the welding machine, the weld seam will be misaligned 1. The strip is twisted to form a sickle bend. This defect has a negative impact on the disc shearing edge and rolling of the rolling mill in the subsequent process, and seriously affects the normal production of the unit. Therefore, the strip must be corrected when it is running on the unit's operation line. . [0003...

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Problems solved by technology

[0002] When the cold tandem mill is in production, the strip tends to deviate. When the deviation is serious, it will rub against the equipment, causing damage to the equipment and tearing of the strip.

There are many reasons for the deviation, such as: poor alignment of the walking beam, deviation of the center line of the trolley, strip steel wave shape, sickle bend, etc. When the deviation strip arrives at the welding machine, the weld seam will be misaligned 1. The strip is twisted to form a sickle bend. This defect has a negative impact on the disc shearing edge and rolling of the rolling mill in the subsequent process, and seriously affects the normal production of the unit. Therefore, the strip must be corrected when it is running on the unit's operation line.

[0003] At present, two correction methods are generally used for the deviation of strip steel in the uncoiler: one is to use side guide plates to correct the head and tail of the hot-rolled steel coil, but this method has very limited correction ability and can only correct small deviations. The head-to-tail deviation of the strip steel is because the width range of the side guide plate is only slightly larger than the width of the strip steel. When the deviation of the strip steel is large, the strip steel will not be able to enter the side guide plate because the width exceeds the set width of the side guide plate area, damage the side guide plate or deform the strip itself

The second is to manually jog the movement of the uncoiler d

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