Head warping control method for rough rolling in production of hot-rolled steel strips
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A technology of hot-rolled strip steel and control method, which is applied in the field of hot-rolled strip steel production
Inactive Publication Date: 2014-10-01
BAOSTEEL STAINLESS STEEL +1
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[0012] Aiming at the warping problem of the head of the slab in the rough rolling process of hot rolling, the present invention proposes a method for controlling the warping of the head of the rough rolling of hot-rolled strip steel. The value of line height attachment, a
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Embodiment 1
[0039] For a certain rough rolling process, the entrance thickness is 87.4mm, the exit thickness is 59.2mm, the roll diameter is 1015.0mm, and the rolling speed is 2.1m / s.
[0040] According to the above method, the additional value of the rolling line height is 3.0mm, and the rolling line height can be calculated:
[0041] Δ = h 0 - h 1 2 + δ = 87.4 - 59.2 2 + 3.0 = 17.1 ( mm )
[0042] Speed increase:
[0043] dω = 4 v 0 δ D W ...
Embodiment 2
[0046] For a certain rough rolling process, the entrance thickness is 57.3mm, the exit thickness is 40.0mm, the roll diameter is 1015.0mm, and the rolling speed is 2.4m / s.
[0047] According to the above method, the additional value of the rolling line height is 2mm, and the rolling line height can be calculated:
[0048] Δ = h 0 - h 1 2 + δ = 10 . 65 ( mm )
[0049] Speed increase:
[0050] dω = 4 v 0 δ D W ( h 0 ...
Embodiment 3
[0052]For a certain rough rolling process, the entrance thickness is 160.7mm, the exit thickness is 119.4mm, the roll diameter is 1015.0mm, and the rolling speed is 1.8m / s.
[0053] According to the above method, the additional value of the rolling line height is 4.0mm, and the rolling line height can be calculated:
[0054] Δ = h 0 - h 1 2 + δ = 24.65 ( mm )
[0055] Amount of speed increase:
[0056] dω = 4 v 0 δ D W ( h 0 ...
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Abstract
Disclosed is a head warping control method for rough rolling in production of hot-rolled steel strips. Firstly, a lower-rollers electric pressing-up mechanism is adopted, and a rolling line height Delta, namely the height difference between the upper roller face of a lower operating roller of a roller mill and the upper roller faces of the roller beds of the inlet and outlet, is set as (img file = 'DDA00002978950300011.TIF' wi = '318' he = '112' /) in millimeters; h0 and h1 represent the rolled member inlet and the outlet thicknesses respectively in millimeters, and the delta is a rolling line height additional value and ranges from 2 to 10mm; meanwhile, the speed difference between an upper operating roller and the lower operating roller is adjusted, the roller mill speed increment is acquired as (img file = 'DDA00002978950300012.TIF' wi = '462' he = '172' /), d omega is a rotating speed increment in rad/s, and the DW is the diameter of rollers in millimeters. The method has the advantages that the problem of head warping for rough rolling during hot rolling production is optimized, damage to production equipment by head warping is reduced, and production stability is improved.
Description
technical field [0001] The invention belongs to the technical field of hot-rolled steel strip production, and in particular relates to a method for controlling the warpage of rough-rolled heads in production of hot-rolled strip steel. Background technique [0002] Hot-rolled strip steel is an important steel product, and hot rolling is one of the main methods of hot-rolled strip steel production. [0003] In the production process of hot-rolled strip steel, especially in the rough rolling process, the head bending phenomenon in the thickness direction often occurs in the rolled piece. The upward bending is usually called warping, and the downward bending is called buckling. like figure 1 As shown, the rolling stock 10 exits the roll 20 and bends upwards. [0004] The problem of warping and buckling in hot rolling production is extremely harmful. In severe cases, it is easy to hit and damage descaling boxes, roller tables and other equipment, affecting production stability....
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