Method for controlling tower shape of steel coil

Abstract

The invention relates to a method for controlling the tower shape of steel coil. The method comprises the following steps that 1 ) the temperature difference between the upper surface and the lower surface after strip steel heating is controlled within the range of + / -15 DEG C; 2 ) before the rough rolling roll begins to roll and the roll level of the roll is checked, a center instrument curve isrolled according to the rough rolling R1, the horizontal of the actual roller is adjusted, and the operation side roller gap is adjusted by the rough rolling according to the finish rolling feedback;3 ) during finish rolling, when the strip steel is deviated from the transmission side, the roll gap of the rolling mill F1 is pre-raised by 0.08-0. 12 mm, the roll gap of the rolling mill F3 is pre-lifted by 0.10-0.15 mm, the roller gap of the last-frame rolling mill is pre-raised by 0.05-0.10 mm, when the strip steel is centered or deviated from the transmission side, and normal production is carried out; 4 ) when rough rolling material is carried out on the side bending of the transmission side, the additional value of the guide ruler is determined according to the abrasion degree of the guide ruler, adjusting is carried out between 0-8 mm, and the pressure coefficients on the two sides of the tension roller are adjusted from 0.75-1.5; and 5) the tower is carried out pressure shape treatment by using an online rolling device.

Description

technical field [0001] The invention relates to the field of hot rolling, in particular to a method for controlling the tower shape of steel coils. Background technique [0002] The rework of the tower shape of medium and thin billet steel coils requires a large amount of rework, which takes up too many resources for the division of coils. At the same time, the tower coils are easy to cause secondary defects such as scratches during the hoisting process. It is also easy to produce quality objections in the end. Therefore, in order to reduce losses and ensure product stability, coil tower shape control is required. Contents of the invention [0003] The technical problem to be solved by the present invention is a method for controlling the tower shape of steel coils, which can improve the first pass rate of hot-rolled products, reduce losses, reduce the rework amount of coils, and ensure product stability. [0004] To achieve the above object, the present invention adopts...

AI Technical Summary

Problems solved by technology

[0002] The rework of the tower shape of medium and thin billet steel coils requires a large amount of rework, which takes up too many resources for the coils. At the same time, the tower coils are prone to secondary defects such as scratches during the hoisting process. If the commercial materials are not blocked or the blockage is not timely quality objection