Rolling method and rolling system of closed type profile steel

Abstract

The invention provides a rolling method and rolling system of closed type profile steel. The rolling method comprises the following steps of designing an inner bending part to be of an open structureand to be used as a hot-rolled finished product, designing a hole pattern of a roller according to the outline contour of the hot-rolled finished product so as to form a hot-rolling hole pattern, anddesigning a hole pattern of the roller according to the outline contour of the inner bending part so as to form a hot-bending hole pattern; selecting a blank material and carrying out rolling throughthe hot-rolling hole pattern to obtain a hot-rolled finished product; and rolling the hot-rolled finished product through the hot-bending hole pattern to obtain a closed type profile steel finished product. The rolling system involves a hot rolling device and a hot bending device, wherein the hot rolling device is used for rolling the blank material to obtain the hot-rolled finished product, the hot bending device is used for carrying out hot bending on the hot-rolled finished product to obtain the closed type profile steel finished product, and the part, corresponding to the inner bending part of the closed type profile steel, on the hot-rolled finished product is an open structure. According to the method and the system, the process design difficulty is reduced, the development period isshortened, the metal yield is improved, processing energy consumption and equipment loss are reduced, and the effects of saving resources and improving the resource utilization rate are achieved.

Description

technical field [0001] The invention relates to the technical field of steel production equipment, and more specifically, to a rolling method and a rolling system for a closed section steel. Background technique [0002] Section steel is a long strip of steel with a certain cross-sectional shape and size. Generally, it is formed at one time by rolling. [0003] In the existing production operations, the closed section steel is generally formed by one-time direct hot rolling, and the inner bending part is the key to the closed section steel forming. The process design is difficult, the stability of the rolling process is poor during rolling, and the inner bending When the part is formed, the process is complicated, and the wear of the roll equipment is large, which makes the production control difficult, and causes certain difficulties to the process design and on-site production. [0004] To sum up, how to reduce the design difficulty of the closed section steel production ...

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Problems solved by technology

[0003] In the existing production operations, the closed section steel is generally formed by one-time direct hot rolling, and the inner bending part is the key to the closed section steel forming. The process design is difficult, the stability of the rolling process is poor during rolling, and the inner bending When the part is formed, the process is complicated, and the loss of the roll equipment is large, which makes the production control difficult, and causes certain difficulties to the process design and on-site production.

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