Control method for preventing bending and deformation of head of rough rolling plate blank

Abstract

The invention provides a control method for preventing bending and deformation of the head of a rough rolling plate blank. An up-rolling speed of a rough rolling machine is automatically subjected to fine tuning through a human-computer operation window and a control program under the premise of constant down-rolling speed of the rough rolling machine so that the speeds of the up-rolling and the down-rolling deviate, so and the deformation of an upper surface and a lower surface of the plate blank is controlled. In the invention, the human-computer operation window is used for adjusting and setting speeds of each path of up-rolling motor of the rough rolling machine; the human-computer operation window is provided with a function put-in option button, a control way option button, a model set option button and speed regulation value input windows of each path of the up-rolling motor; and the control program consists of a function put-in option program, a control way option program and a speed given program of the up-rolling motor. The invention can automatically realize the regulation to the bending and the deformation of the head of the rough rolling plate blank through set data. The method is simple and reliable, effectively improves rolling rhythm, improves production efficiency and reduces workload and labor intensity.

Description

technical field [0001] The invention belongs to the technical field of industrial electrical automation, and in particular relates to a method for controlling the head bending of a rough-rolled slab in a rough-rolling area of ​​a hot-rolling production line. Background technique [0002] The rough rolling mill is used as the blanking machine for hot rolling production. The biggest equipment safety hazard in production is the bending deformation of the slab head. This bending deformation has two manifestations, one is that the slab warps upward after the rough rolling mill bites the steel, and the other is that the slab bends downward after the rough rolling mill bites the steel. The first kind of upward warping of the slab directly threatens the equipment on the rolling line of the roughing mill, and the large upward warping of the slab is often accompanied by damage to the descaling box of the roughing mill. When the second type of slab bends downward, its damage is far gr...

AI Technical Summary

Problems solved by technology

The first type of upward warping of the slab directly threatens the equipment on the upper rolling line of the roughing mill. Larger upward warping of the slab is often accompanied by damage to the descaling box of the roughing mill.

When the second type of slab bends downward, its damage is far greater than that of the slab upward warping. After this situation occurs, the light one will damage the roller table and the guard plate, and in severe cases, the slab will drill into the trench or slab. The billet is stuck in the roughing mill, and the impact of the accident time is very long

The problem with this method is that the bending amount of the head of the slab is different in each rolling pass, and the operator needs to adjust the next pass according to the deformation amount of each pass of the roughing mill.

This results in a heavy workload for operators and cumbersome work.

And this method requires a high degree of concentration of the operator

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