Design method of initial off-position angle of hot-rolling H-shaped steel flying shear

Abstract

The invention relates to the technical field of metallurgy hot rolling, in particular to a design method of the initial off-position angle of a hot-rolling H-shaped steel flying shear. The invention designs the initial off-position angle of the flying shear with a cyclic iterative numerical method and aims to provide a design method of the initial the off-position angle of a hot-rolling H-shaped steel flying shear, which has good popularity, high adaptability, high calculation accuracy and the like and is used for more clearly finishing design of the flying shear. The invention can serve as abeneficial design supplement for the crank connecting link design of the flying shear, can truly reflect the principle of the design of the flying shear mechanism, provides a powerful theory support for accurately controlling the flying shear, is convenient to submit the perfect function specification of the flying shear equipment, can be used for solving the trajectory, the speed of each direction and the angular velocity of each node of the flying shear.

Description

technical field [0001] The invention relates to the technical field of metallurgical hot-rolling technology, in particular to a method for designing the initial stop angle of a hot-rolled H-shaped steel flying shear. Background technique [0002] Flying shear is one of the important equipments in the steel rolling production line. It is arranged in front of the finishing rolling unit. It is used for cutting and breaking the head and tail of the rolled steel during hot rolling of section steel. The quality of its work performance directly affects the production efficiency of the rolling line and the quality of the product cut. With the development of continuous rolling mills, flying shears have been used more and more widely. [0003] According to the requirements of the hot-rolled H-beam production process, the flying shear adopts the start-stop type, and the type is a crank connecting rod. It uses the eccentricity of the crankshaft to form a rocker to complete the predeter...

AI Technical Summary

Problems solved by technology

If the initial stop angle of the flying shear is too large, the opening of the upper and lower cutting edges may not meet the process requirements; if the initial stop angle of the flying shear is too small, the flying shear may not be able to complete braking within 360° Added the complex control process of the flying shear back swing

[0004] In the existing engineering design and related literature, generally only the running track of the shear blade of the crank linkage mechanism, the speed and acceleration in the x and y directions are calculated, and some kinematic parameters of the shear blade are obtained. In the current design reference and experience The design of the flying shears was completed under the premise of the design, and the calculation of the initial stop angle of the hot-rolled H-beam flying shears was not considered at all, which was quite unfavorable to the design of the flying shears and the development of its control system

Due to the complexity of the trajectory of the flying shears, it is difficult to determine the spatial orientation of the connecting rod and the rocker at the initial parking angle, so it is also difficult to determine the initial parking angle of the flying shears by geometric drawing.

Images