Method for designing section height sequence of structural steel sheared by hot rolling flying shears

Abstract

The invention relates to the technical field of metallurgical hot rolling process, and particularly discloses a method for designing a section height sequence of structural steel sheared by hot rolling flying shears, which comprises the following steps of: calculating a space trace curve of shearing blades; calculating theoretical coordinate values of the shearing blades; calculating a shear angle; performing translation on the output rotating speed of a motor, and the like; and finally determining judgment criterion for the selection of the motor and the rotating speed in systematic checking calculation to be that a relative difference between the output rotating speeds of the motor before and after the shearing may be not more than 25 percent and not less than 10 percent, determining that the designed section heights of the structural steel meet design requirements after the motor and the rotating speed reach the judgment criterion in a given section height designing range of the structural steel, and sequentially recording the designing values to obtain the section height sequence of the structural steel sheared by the hot rolling flying shears. The method can be used as an advantageous supplementary design for the design of a crank-link mechanism of the flying shears, and has the advantages of high universality, adaptability, high speed, high calculation accuracy and the like.

Description

technical field [0001] The invention relates to the technical field of metallurgical hot-rolling technology, in particular to a method for designing the section height sequence of hot-rolled flying shears. 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] In the process of flying shears cutting the head of the rolled piece, in order to avoid accidents such as steel blocking or stretching deformation of the rolled piece, the hot rolling process requires that the horizontal speed of the shear blade should no...

AI Technical Summary

Problems solved by technology

As a result, the selected motor power may be too large or cannot meet the process and control requirements of the process for the shearing process

In addition, because in the accounting process, only one of the specifications is often calculated based on experience, there is a lack of systematic design verification methods and design means, which is not convenient for serialized design of products

Judging from the current actual engineering design, the motor is often much larger than the actual need, which virtually increases the cost of project operation, which is not conducive to economical design

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