H-type shape steel vertical rolling method and apparatus

Abstract

The present invention relates to a vertical rolling method of wide flange steel and its equipment, belonging to the field of metal rolling technology. Said method includes the following steps: billet heating, des caling, blooming, cropping and rolling so as to obtain the rolled material with web plate and flange. Said invention also provides the concrete operation steps of said rolling process.

Description

technical field [0001] The invention belongs to metal rolling, in particular to a rolling method and device for section steel. Background technique [0002] H-shaped steel is an economical section steel, which is widely used in industry, agriculture, transportation and construction projects. At present, the rolling of H-shaped steel adopts the method of horizontally rolling the web. After the billet is heated, it is billet-rolled, and the rolled piece with H-shaped web and flange enters the universal intermediate and finishing mills and edge mills. Rolling is carried out, the web is rolled and thinned by the horizontal rollers arranged up and down, and the flange is thinned by the vertical rollers arranged on the left and right. The cross-section of the rolled piece is in the shape of a positive "H" from the beginning to the end, the web is in a horizontal state, and the flange is in a vertical state. The defect of this rolling method is that during the rolling process, a c...

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Problems solved by technology

The cross-section of the rolled piece is in the shape of a positive "H" from the beginning to the end, the web is in a horizontal state, and the flange is in a vertical state. The defect of this rolling method is that during the rolling process, a considerable part of the cooling water sprayed on the roll flows into the web. In the long groove formed by the flange and the flange, it cannot be ruled out

The cooling water causes the temperature of the rolled piece to drop rapidly, the temperature drops, and the rolling force and moment increase exponentially, which not only increases the rolling force and rolling moment, but also increases the energy consumption of rolling production, and deteriorates the mechanical properties of the steel. performance, which increases the difficulty of rolling, especially for rolling web and flange thin-walled products. Some light-duty thin-walled products cannot be rolled, thus limiting the application of H-beams

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