Method for controlling hot-rolled thin-specification strip steel coil shape

Abstract

The invention discloses a method for controlling the hot-rolled thin-specification strip steel coil shape. The method is specifically characterized in that the centering deviation of a front side guide plate of a coiling machine is less than or equal to 3 mm, and the parallelism degree is smaller than or equal to 5 mm / m; a pinch roll is calibrated to be started at the rolling position, and the small-pressure dynamic calibration is carried out; the clearance deviation of a transition plate is smaller than or equal to 2 mm, and the abrasion depth is less than or equal to 10 mm; the calibration of a wrapper roll adopts open loop control, the deviation of roll gaps at the two sides is less than or equal to 0.5 mm, and the gap relative to an arc-shaped plate is less than or equal to 3 mm; a first step reduction position given protection function is adopted when the wrapper roll performs stepping control; the thickness error compensation of the strip steel in the coiling diameter calculationis limited within 3 mm; and the coiling machine adopts a tail automatic tail setting protection function, and the strip steel enters the tail setting mode when the tail of the strip steel is 100 m away from the coiling machine. According to the method, the coiling process and the management precision of coiling equipment are controlled, so that the problems of poor roll shape can be effectively solved, and the good economic benefits are achieved.

Description

technical field [0001] The invention belongs to the field of hot-rolling and rolling, and relates to a method for controlling the coil shape of a hot-rolled thin-gauge steel strip. Background technique [0002] In order to reduce production costs, downstream customers are increasingly inclined to "replace thickness with thinness" and "replace coldness with thinness". This requires steel manufacturers to continuously reduce production costs and provide cheaper products. At present, according to market demand, steel mills generally adopt the development of thin-gauge hot-rolled products instead of cold-rolled products, and develop thinner products with better performance to replace thick-gauge products. Hot-rolled thin-gauge steel strip has huge market prospects, but in actual production, compared with thick-gauge hot-rolled strip steel, the speed of thin-gauge hot-rolled strip steel can reach 15-18m / s in the coiling area, and it is very easy to coil at high speed. Causes bad...

AI Technical Summary

Problems solved by technology

At present, the problem of poor shape of thin-gauge hot-rolled strip steel has seriously affected product quality and increased production costs, which urgently needs to be solved