Preprocessing method and preprocessing device for steel plate trimming

Abstract

A preprocessing method and a preprocessing device for strip steel trimming are provided. A sequential multi-step gradual bending method is adopted, a bending angle is gradually increased, and the connection strength between the edge portion of strip steel and a base plate is gradually reduced. After the bent edge portion of the steel plate is straightened, the crack effects of the connection area of the edge portion are obvious, and accordingly the edge portion further enters a circle shear, the shearing processing becomes easy. The preprocessing method and the preprocessing device for the steel plate trimming can remarkably improve pre-processing process and equipment for trimming of the circle shear on an existing plate strip rolling production line, series connection of a laser shearing technology and a multi-step bending technology is adopted, large amount of shearing is shared for the circle shear, the processed steel plate enters the circle shear to finish the final shearing, a typical multi-step shearing method is formed to meet the adjustment requirements of an shear object for multi-thickness specifications, varieties of mechanical strength and varieties of shear speed and achieve the combination of high-speed shearing and good shearing quality.

Description

technical field [0001] The invention belongs to the technical field of fixed-width shearing of cold steel plates, adopts a multi-step bending method in motion, so that the edge of the steel plate entering the disc shears already has a significant cutting condition, thereby significantly improving the cutting performance of the disc shears. The shearing effect of the shears, and to ensure that the edge quality of the strip after cutting is intact, this pretreatment technology can significantly improve the shearing stability and shearing service period of the disc shears, thereby effectively improving the shearing speed and the post-cutting Edge quality is an invention related to edge shearing of cold steel plates. Background technique [0002] Fixed-width disc shears (also known as trimming shears) are important equipment used in continuous rolling or semi-continuous rolling production lines. The appearance and size specifications meet the width requirements of the product. ...

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Problems solved by technology

[0005] 2) It is difficult to accurately control the shear width value: Due to the special structural form and shear characteristics of the disc shear, it is difficult to accurately control the shear width of the steel plate, especially the thick gauge and high strength steel plate. Shear deviation will cause great metal loss, which directly affects the steel yield of the production line

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