Multi-stage rolling device for H-shaped steel

Abstract

The invention provides a multi-stage rolling device for H-shaped steel, and relates to the technical field of section steel rolling. The multi-stage rolling device comprises a first universal rolling mill, a second universal rolling mill, X-shaped steel and H-shaped steel, the second universal rolling mill comprises a horizontal upper roller, a horizontal lower roller, a rotating side vertical roller and an operation side vertical roller, and a third stroke recording sensor is fixedly arranged on the side, away from the operation side vertical roller, of the rotating side vertical roller. A fourth stroke recording sensor is fixedly arranged on the side, away from the operation side vertical roller, of the rotating side vertical roller, and first stroke recording sensors are fixedly arranged on the two sides of the horizontal upper roller. According to the multi-stage rolling device for the H-shaped steel, a method for controlling the roll gap between the first universal rolling mill and the second universal rolling mill when the H-shaped steel is rolled through an X-H rolling method is provided, a foundation is laid for improving the control precision level of the flange size of the H-shaped steel, and the yield is greatly increased while the product quality is improved.

Description

technical field [0001] The invention relates to the technical field of section steel rolling, in particular to a multi-stage rolling device for H-section steel. Background technique [0002] H-shaped steel is an economical cross-section high-efficiency profile with more optimized cross-sectional area distribution and more reasonable strength-to-weight ratio. It is named because its cross-section is the same as the English letter "H". Section steel has the advantages of strong bending resistance in all directions, simple construction, cost saving and light structure weight. [0003] The X-H rolling method is an advanced H-shaped steel rolling process. It is realized on a three-stand reversing tandem rolling mill. The first rolling mill is a universal rolling mill with an X-pass design. The vertical rolls are in the shape of waist drums. The billet rolled by the billet mill will be rolled into X shape after passing through the first universal rolling mill. The second rolling ...

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Problems solved by technology

[0005] Aiming at the deficiencies in the prior art, the present invention provides a multi-stage rolling device for H-shaped steel, which solves the problem that in the X-H rolling method, the vertical roll of the first universal rolling mill is in the shape of a waist drum, not a standard cylindrical shape. This adds difficulty to the calculation of the vertical roll gap of the universal rolling mill during the rolling process, and because the vertical roll gap cannot be accurately calculated during the rolling process, it will affect the control accuracy of the flange size of the H-beam product, resulting in a The problem of greatly reducing the rate of

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