CN105327951A - Method for controlling tail gate hot roller seam width in seven-gate hot rolling production process of stainless steel plate - Google Patents

Abstract

The invention discloses a method for controlling a tail gate hot roller seam width in the seven-gate hot rolling production process of a stainless steel plate. The method comprises the steps that firstly, the fifth-gate hot rolling width B5' is measured through a width gauge arranged on the outlet side of fifth-gate vertical hot rollers; secondly, the fifth-gate hot rolling deviation value delta 5 is calculated, delta 5 is obtained by subtracting B5 from B5', and B5 is a set value of the fifth-gate hot-rolled plate blank width; thirdly, the seventh-gate vertical hot roller seam width compensation value W is calculated, W=delta 5*k, and k is the feedforward width compensation coefficient; fourthly, the seventh-gate vertical hot roller seam width B7' is calculated, B7' is obtained by subtracting W from B7, and B7 is a set value of the seventh-gate vertical hot roller seam width; and fifthly, seventh-gate vertical hot rollers are adjusted so that the seventh-gate vertical hot roller seam width can reach B7'.

Description

Tail passage hot rolling roll gap width control method when the hot rolling of a kind of corrosion resistant plate seven passage is produced

Technical field

The present invention relates to tail passage hot rolling roll gap width control method when a kind of corrosion resistant plate seven passage hot rolling is produced.

Background technology

The current corrosion resistant plate technological process of production is mainly: storehouse is handed in steel-making → continuous casting → hot rolling → raw material annealing and pickling → cold rolling → finished products pickling → finished product trimming, packing.Because continuous casting steel billet width, hot rolling cissing, cold rolling cissing in producing stainless steel process etc. exist fluctuation, comparatively obvious to final products widths affect, affect product lumber recovery and overall quality level.To wherein finished width, there is considerable influence and more difficult accurate control be continuous casting working procedure and hot-rolled process.Hot-rolled process generally adopts seven passage hot rolls to carry out continuous rolling, after per pass rolling always there are some deviations with setting width in the developed width of sheet material, thus after making the rolling of tail road terminate, sheet material developed width is comparatively large with the difference of setting width, affects the quality of follow-up finished product.

Summary of the invention

Technical problem to be solved by this invention is: provide a kind of effective control stainless steel hot-rolling width, improve tail passage hot rolling roll gap width control method when the corrosion resistant plate seven passage hot rolling of product quality and lumber recovery is produced.

For solving the problems of the technologies described above, the technical solution adopted in the present invention is: tail passage hot rolling roll gap width control method when a kind of corrosion resistant plate seven passage hot rolling is produced, the steps include:

A. the 5th passage hot rolling width B 5' measured by the width gauge by being arranged on the 5th passage Vertical Rolling outlet side;

B. calculate the 5th passage hot rolling deviate Δ 5, Δ 5=B5'-B5, B5 are the 5th passage hot rolling slab width set-point;

C. calculate the 7th passage Vertical Rolling roll gap width compensation value W, W=Δ 5 × k, k are feedforward width compensation coefficient, and the concrete numerical value of 0.3 < k < 0.8, k carries out selecting adjustment according to the condition of production within the scope of this;

D. calculate the 7th passage Vertical Rolling roll gap width B 7', B7'=B7-W, B7 are the 7th passage Vertical Rolling roll gap width set-point;

E. adjusting the 7th passage Vertical Rolling makes its roll gap width reach B7'.

The invention has the beneficial effects as follows: this method is by the measurement to the actual hot rolling width of the 5th passage, according to the difference of measured value and setting value, the roll gap width of adjustment tail road (i.e. the 7th passage), thus make the strip width that rolls out can convergence setting value better, thus effectively control stainless steel hot-rolling width, improve product quality and lumber recovery.

Detailed description of the invention

Specific embodiment of the invention scheme is described below in detail.

When the hot rolling of a kind of corrosion resistant plate seven passage is produced, tail passage hot rolling roll gap width control method, the steps include:

A. the 5th passage hot rolling width B 5' measured by the width gauge by being arranged on the 5th passage Vertical Rolling outlet side;

B. calculate the 5th passage hot rolling deviate Δ 5, Δ 5=B5'-B5, B5 are the 5th passage hot rolling slab width set-point;

C. calculate the 7th passage Vertical Rolling roll gap width compensation value W, W=Δ 5 × k, k are feedforward width compensation coefficient, k=0.5;

D. calculate the 7th passage Vertical Rolling roll gap width B 7', B7'=B7-W, B7 are the 7th passage Vertical Rolling roll gap width set-point;

E. adjusting the 7th passage Vertical Rolling makes its roll gap width reach B7'.

This method makes hot-rolled stainless rolled steel plate width obtain effective control, and the moderate rate of roll bending width brings up to 84.0% by 79.7%, and width is applicable to rate and improves 4.3%.

The above embodiments are the principle of illustrative the invention and effect thereof only, and the embodiment that part is used, but not for limiting the present invention; It should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise of the invention, can also make some distortion and improvement, these all belong to protection scope of the present invention.

Claims (1)

1. when the hot rolling of corrosion resistant plate seven passage is produced, a tail passage hot rolling roll gap width control method, the steps include:

A. the 5th passage hot rolling width B 5' measured by the width gauge by being arranged on the 5th passage Vertical Rolling outlet side;

B. calculate the 5th passage hot rolling deviate Δ 5, Δ 5=B5'-B5, B5 are the 5th passage hot rolling slab width set-point;

C. calculate the 7th passage Vertical Rolling roll gap width compensation value W, W=Δ 5 × k, k are feedforward width compensation coefficient, 0.3 < k < 0.8;

D. calculate the 7th passage Vertical Rolling roll gap width B 7', B7'=B7-W, B7 are the 7th passage Vertical Rolling roll gap width set-point;

E. adjusting the 7th passage Vertical Rolling makes its roll gap width reach B7'.