Method for improving shearing precision of head-cutting flying shear

Abstract

The invention provides a method for improving the shearing precision of a head cutting flying shear. The method comprises the steps that a rolled piece passes through a length calculation formula: L = N * LPP; the method comprises the following steps: 1) calculating the pulse equivalent from the working roll diameter: LPP1 = pi * Dw / (PRR * i); (2) measuring the pulse equivalent through two HMDs: LPP2 = L2 / N2; finally, when the rolled piece passes through the length L, LPP = (LPP1 + LPP2average) / 2; according to the method, the pulse equivalent LPP1 is calculated from the working roll diameter, the pulse equivalent LPP2 is measured through the two HMDs, the two methods are combined to obtain the average value, and therefore the accuracy and precision of the algorithm are improved, the detection precision of a detection mechanism is improved, the shearing precision of the head-cutting flying shear is improved, the cutting loss rate is reduced, and the working efficiency is improved. And the yield and the economic benefit are improved.

Description

technical field [0001] The invention relates to the technical field of rolling flying shear control, in particular to a method for improving the shearing precision of the cutting head flying shear. Background technique [0002] Flying shear is a kind of shearing machine, which cuts the moving rolling piece transversely; the flying shearing machine is mainly used to cut medium and small steel billets, thin slabs, small sections (bars), as well as hot and cold rolling. Strip steel (including coated); flying shears are installed on the rolling line to transversely cut the head and tail of the rolling stock or cut the rolling stock to length. [0003] According to the cutting parts of the flying shears, it can be divided into cutting head flying shears and fixed-length flying shears. Among them, the cutting head flying shear is a flying shear that cuts the head and tail of the rolling material or rolling stock. According to the temperature of the workpiece to be cut, the flyin...

AI Technical Summary

Problems solved by technology

[0004] The normal cutting head flying shear automatic control system can cut the steel head according to the set length. When the shear length deviates from the set length by more than 5 mm, it is considered that the control accuracy of the cutting head flying shear is not accurate enough. The direct consequence of excessive deviation is high cutting loss rate and low yield rate of steel, which affects economic benefits