Control method for flying shear tail-shearing of rod wire

Abstract

The invention relates to a control method for flying shear tail-shearing of rod wire. Specifically, when over compact arrangement of an upstream rolling mill (1) and the flying shear results in an over short distance from a first hot metal detector (2) to a shearing central line of the flying shear which does not allow normally shearing tail, a second hot metal detector (4) is additionally arranged in front of the upstream rolling mill (1); and the tail-shearing control, when the distance from the rod wire flying shear to the first hot metal detector (2) is over short, is realized by combining precise shear blade position control, precise shear tail length control, conversion of equivalent distance from the second hot metal detector (4) to the flying shear center line, actual measurement and compensation of elongation rate of the upstream rolling mill (1). The invention solves the problem that the tail-shearing project is not normally finished because of over compact arrangement of the upstream rolling mill (1) and the flying shear and over short distance from the first hot metal detector (2) and the flying shear in the rod wire production wire; and the tail-shearing is steady and reliable according to the actual application result.

Description

technical field [0001] The invention relates to the field of electrical control, in particular to a control method for tail cutting of flying shears for rods and wires. Background technique [0002] In the hot continuous rolling bar production line and high-speed wire rod production line, flying shear is the key equipment to improve the productivity and finished product rate of the rod and wire rod production line. At present, the flying shears on the rod and wire production line all adopt fully digital electric control start-stop flying shears (including rotary type, crank-connecting rod type, crank-connecting rod flywheel type). The main technological functions of flying shears are: cutting the head, cutting the tail, double-length cutting, breaking, etc. During the rolling process, the tail of the rolled piece is easy to crack, which affects the product quality. key process functions. [0003] In the actual project application, in order to save the floor area of ​​the f...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a method for controlling the flying shears of rods and wires. This method only adds a hot metal detector in front of the upstream rolling mill, and solves the problem of The layout of the upstream rolling mill and flying shears is too compact, and the distance between the hot metal detector and the cutting centerline of the flying shears is too short, so the tail cutting cannot be completed normally, which not only saves costs, but also shortens the construction period

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