Method for controlling pass-line deflection of finishing mill stand according to intermediate billet camber

Abstract

The invention discloses a method for controlling the pass-line deflection of a finishing mill stand according to the intermediate billet camber. The method comprises the following steps that (1) a control range is selected; (2) the camber C value is determined; (3) the single side roll gap adjustment amount delta Gap i of the i stand is obtained according to the following model as shown in the specification, the delta Gap i is the single side roll gap adjustment amount (mm) of the i stand, C represents the strip steel camber C value (mm), Km represents the rolling mill rigidity coefficient (KN / mm), Ks represents the plastic deformation coefficient (KN / mm), hi represents the outlet thickness (mm) of the i stand, h0 represents the intermediate billet thickness (mm), W represents the finished strip steel width (mm), and Ki represents the gain coefficient of the i stand and is dimensionless; and (4) the determined single side roll gap adjustment amount delta Gap i of the i stand is transmitted to a screwdown control system for execution. By adoption of the method provided by the invention, the influence of the intermediate billet camber on finish rolling pass-line deflection can be eliminated.

Description

technical field [0001] The invention relates to a method for controlling the deviation of a rolling mill stand, in particular to a method for controlling the deviation of a finish rolling stand. 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. figure 1 A hot continuous rolling production line for hot strip steel is shown. Such as figure 1 As shown, the hot continuous rolling production line includes a heating furnace 1, a roughing mill 2, a finishing mill 3, a laminar cooling device 4 and a coiler 5, wherein the finishing mill 3 includes several finishing stands, and in the hot rolling production line, the finishing Rolling mill 3 includes finishing stands F1-F7. The production process of the hot continuous rolling production line is: first, the billet is heated by the slab in the heating furnace 1, then dephosphorized by high-pressure water, and then rough ...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for controlling the deviation of the finish rolling stand according to the camber of the intermediate billet. This method can solve the problem that the stability of the finishing rolling is affected by the camber of the intermediate billet during rough rolling, and reduce the deviation of scrap steel. Improving the Shape Quality of Hot-rolled Strip Products

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