Automatic distribution method of rolling load of roughing vertical roll

Abstract

The invention provides an automatic rolling load distribution method of a rough rolling vertical roller. The automatic rolling load distribution method of the rough rolling vertical roller comprises the steps (a) calculating total natural broadsiding amount and effective width rolling reduction of rough rolling; (b) calculating stability rolling reduction limit of the pass according to the width-to-thickness ratio of a vertical roller rolling reduction pass; (c) using the stability rolling reduction limit as a scale factor and confirming vertical roller rolling reduction distribution; (d) calculating effective rolling reduction of each pass; (e) calculating the outlet width of each forward pass horizontal roller to serve as a width target of each forward pass; (f) invoking machine frame vertical roller rolling calculation and re-calculating the rolling reduction of each machine frame vertical roller for considering the dog bone broadsiding. The problem that an existing rolling load distribution method of the rough rolling vertical roller enables existing load distribution to be uneven and enables a partial machine frame load to be hung upside down can be solved.

Description

technical field [0001] The invention relates to the technical field of steel rolling control, in particular to a method for automatically distributing rolling loads of rough rolling vertical rolls. Background technique [0002] At present, two rolling mills are generally used for rough hot rolling, and the two rolling mills include two vertical roller mills E1 and E2. The general principle of rough rolling vertical roll load distribution is that the rough rolling rolls the slab to the target width in the first pass of the E1 large vertical roll, and the rolling target of each forward pass of the subsequent vertical roll maintains the R2 exit width, That is to say, each forward pass of rough rolling is based on the target width of R2 exit, and the entry width of each pass is side-pressed by E1 and E2 vertical rolls, and the target width of R2 exit is reached after horizontal rolling by R1 or R2. . There are two problems with this vertical roller load distribution method: ...

AI Technical Summary

Problems solved by technology

In this case, using the general rough width rolling method, uneven load distribution between rolling passes may occur

The load on the first frame will be too large or too small to effectively utilize the vertical roll reduction of each pass, see Figures 5a-6b

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