A comprehensive control method for the pressure position of the coiling side guide plate in hot continuous rolling

Abstract

The invention discloses a comprehensive control method for the pressure position of a hot continuous rolling rolled side guide plate. At the head of all-variety strip steel, side guide plate head alignment pre-positioning control is conducted according to the finish rolling incoming material plate shape and the transverse vibration situation; for thin-specification plain carbon steel, the cold state width value is calculated at the corresponding rolling target temperature through an instrument, side guide plate middle position control is achieved; for thick-specification high-strength steel, side guide plate middle pressure closed-loop control is achieved; and at the tail of the all-variety strip steel, automatic side guide plate tail pressure closed-loop control is achieved according to the strip steel tail deflection direction. In the whole rolling period, the actual positions of the head and the tail of the strip steel are tracked in real time, and accordingly corresponding actionsare executed. Since the comprehensive control method is input, the on-machine service time of a rolled side guide plate is seven days; the cold-rolled raw material edge breaking material return rate is reduced to 0.46%, the thin-specification plain carbon steel roll head tower-form maximum value is reduced to 30 mm, and steel roll middle maximum roll-shaped sawteeth are reduced to 2 mm; and the abnormal roll shape occurrence rate is reduced to 1.52%.

Description

technical field [0001] This application relates to the technical field of coiling of coilers, in particular to a method for comprehensively controlling the pressure position of a coiling side guide plate, which is applied to a hot continuous rolling production line and can be extended to the coiling area of ​​other hot continuous rolling production lines. Background technique [0002] As the quality requirements of cold-rolled automobile outer plates and hot-rolled pickled steel raw materials continue to increase, the processing methods and uses of users continue to improve. In order to ensure the coil shape quality of hot continuous rolled steel coils, the traditional coiling side guide plate passing control of hot continuous strip steel is realized through the detection of the position of the strip head and the closed-loop control of the coiling side guide plate’s full pressure. [0003] This control method will cause partial wear of the take-up side guide plate. Once the ...

AI Technical Summary

Problems solved by technology

[0003] This control method will cause partial wear of the take-up side guide plate. Once the wear exceeds 10 mm, the take-up side guide plate must be replaced immediately, resulting in a short service life of the side guide plate, frequent equipment replacement, and high quality risks. The uneven wear of the guide plate causes quality problems such as scratches, cracks, edge damage, and abnormal coil shape on the edge of the strip. At the same time, it has a major impact on the surface quality of the hot-rolled strip. In severe cases, even scrap steel occurs

The solution to such problems can only be achieved by stopping the machine to replace the coiling side guide, which not only affects production efficiency, but also increases safety risks

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