Rough rolling pass system for flexible rolling of H-shaped steel and rolling method

Abstract

The invention provides a rough rolling pass system for flexible rolling of H-shaped steel and a rolling method. The rough rolling pass system is composed of a flat rolling pass and a vertical rolling pass, the flat rolling pass is used for reducing the thickness of a web of a special-shaped billet, compressing the width of a flange and controlling the width of the inner side of the web, the vertical rolling pass is used for vertically pressing the special-shaped billet, the height of the inner side of the web is reduced to different sizes, and intermediate billets required by production of the H-shaped steel of different types are obtained. According to the system, the same roughing mill pass system can produce the intermediate billets required by different types of H-shaped steel. When the H-shaped steel with the same flange width and different types is produced, one roughing mill can finish rolling of multiple types of intermediate billets, rollers of the roughing mill do not need to be replaced, only the finish rolling mill needs to be replaced, the roller replacing frequency is greatly reduced, the production efficiency is improved, and the number of the rollers and the production cost are reduced.

Description

technical field [0001] The invention relates to the technical field of steel rolling technology, in particular to a rough rolling pass system and rolling method for flexible rolling of H-shaped steel. Background technique [0002] At present, the more efficient and widely used production process in the hot rolling production process of H-shaped steel is: use special-shaped billets as billets, heat up to 1250-1300°C in a heating furnace, and perform multi-pass reciprocating rough rolling in a two-roller roughing mill. Rolling to produce an H-shaped intermediate billet. The two-roller rough rolling mill adopts rolls with a pass system, and the pass position is replaced according to different forming stages for rolling. For the intermediate billet formed by rough rolling, the web and flange are pressed and extended by a universal rolling mill, and the end of the flange is pressed by an edger. In the universal rolling mill, the horizontal roll and vertical roll In the H-shaped ...

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Problems solved by technology

[0007] The purpose of the present invention is to provide a H-shaped steel flexible rolling rough rolling pass system and rolling method, aiming at the deficiencies of the prior art and research blanks, it solves the problems of frequent roll changes and high production costs in the steel production process

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