Continuous variable-curvature profile steel straightening machine

Abstract

The invention discloses a continuous variable-curvature profile steel straightening machine. The straightening machine is provided with an upper straightening roller and a lower straightening roller which are arranged in parallel in a staggered mode, the upper straightening roller and the lower straightening roller are arranged in the staggered mode, the upper straightening roller is provided witha screwdown mechanism which is independently adjusted in the vertical direction, the lower straightening roller is a main transmission roller, the upper straightening roller is a driven roller, and the roller diameters of the straightening rollers are gradually increased from a rolled piece inlet to a rolled piece outlet of the profile steel straightening machine. According to the straightening machine, the small-roller-diameter straightening method is adopted, the straightening process of large deformation under the small reduction is realized in the first few passes of straightening; and byadopting the straightening machine with the variable roller diameter straightening rollers, the continuous change of the straightening reverse bending rate is realized on the premise that the reduction amount of each roller way is the same, and the purposes of reducing the straightening force, reducing the abrasion of the straightening rollers and reducing the energy consumption and the roller consumption are achieved.

Description

technical field [0001] The invention relates to a continuously variable curvature section steel straightening machine. Background technique [0002] At present, due to the influence of the production process of the section steel, there will be residual stress inside the section steel after rolling, resulting in the main defects of the section steel such as up and down bending, camber, edge inward, outward expansion and torsional deformation on the macroscopic level. Straightening is the last process of section steel from billet to finished product, and its main function is to straighten the above-mentioned defects that may occur in section steel rolled pieces. [0003] The straightening of section steel is to make the curvature of section steel gradually change from large to small through repeated mechanical bending, and eliminate the longitudinal uneven extension of internal fiber strips. In order to make the section steel have a better straightening effect, the anti-bendi...

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Problems solved by technology

To increase the deformation of section steel during straightening, it is necessary to reduce the roll distance or increase the reduction. The straightening scheme with small roll distance and large reduction will bring more energy consumption and greater straightening force, and accelerate the straightening roll. wear; and increasing the number of rebending of the section steel requires an increase in the number of straightening rollers, resulting in too large equipment and increased manufacturing costs

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