A method for controlling and monitoring oblique defects of hot-rolled tinplate

Abstract

The invention discloses a control method for the oblique grain defect of a hot-rolled tin-plated plate and belongs to the technical field of oblique grain control. The control method for the oblique grain defect of the hot-rolled tin-plated plate comprises the following steps that strip steel enters a side guide plate from a finishing mill through a run-out table; when the head of the strip steel arrives at the side guide plate, a PLC sends a pre-centering signal to the side guide plate, and the strip steel is pre-centered through the side guide plate; the pre-centered strip steel enters a core shaft through a pinch roller and a wrapping roller of a reeling machine so as to be reeled up; and the core shaft starts expanding after reeling-up, the PLC sends an action signal to the pinch roller, the wrapping roller and the side guide plate, firstly, the pinch roller is uplifted, next, the wrapping roller is opened, and then the side guide plate executes pressure control over the strip steel. According to the control method for the oblique grain defect of the hot-rolled tin-plated plate, the occurring ratio of the oblique grain defect and the defect length can be effectively reduced.

Description

technical field [0001] The invention relates to the technical field of twill control, in particular to a method for controlling slant defects of a hot-rolled tinplate. Background technique [0002] The twill defect of hot-rolled tinplate is a common quality defect, which is mainly concentrated within the range of 100m from the head and tail of the strip steel. Because the main thickness of the tinplate is in the range of 2.0mm, the camber at the head and tail is relatively large, and the head and tail are cooled in the layer. In the case of no tension in the area, the wave shape phenomenon caused by uneven cooling is very easy to appear. During the coiling process, the strip steel is squeezed and deformed by the side guide plate and rolled by the pinch roller and the coiling roll, resulting in twill defects. After the defect flows to the next process, it will affect the rolling stability, surface quality, yield, etc. of the subsequent cold rolling process, and have a greater...

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Problems solved by technology

[0003] The invention provides a method for controlling the oblique defect of hot-rolled tinplate, which solves or partly solves the problem of the strip steel being squeezed and deformed by the side guide plate and passing through the pinch roll and the coiling help roll in the coiling process in the prior art. Technical problems that lead to the occurrence of twill defects after rolling

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