A rolling method of symmetrical spherical flat steel for large shipbuilding

Abstract

The invention relates to the technical field of flat-bulb steel rolling, in particular to a rolling method of symmetric flat-bulb steel for large-scale shipbuilding. The oblique rolling method is adopted for rolling. A rolling device comprises a two-roller type section mill, three to five three-roller type section mills, wherein the three-roller type section mills are arranged transversely. The specific rolling process comprises the following steps of rough rolling, moderate rolling, frictional ring arrangement, fine rolling and forced cooling after rolling, wherein high-pressure water mist issprayed by using a water cooling device, and accurate cooling is performed by accurately adjusting a bulb and the flow of web plate water mist. By adopting the oblique rolling method, the installingdifficulty of a foreplate and the labor intensity of steel rolling workers are reduced on the premise that the problem of insufficient length of each roller body is solved; the bulb metal filling amount and web plate width precision are ensured; by arranging frictional rings, web plate waves are avoided, and the surface quality of rolled pieces is improved.

Description

technical field [0001] The invention relates to the technical field of rolling flat bulbs, in particular to a method for rolling symmetrical flat bulbs for large shipbuilding. Background technique [0002] Bulb flat steel is a medium section mainly used in the field of shipbuilding and bridge building, among which the marine bulb flat is an auxiliary medium section for shipbuilding. Bulb flat steel for ships plays a vital role in the hull structure, and is an indispensable special profile for the construction of 10,000-ton ships, various ocean-going, coastal, inland water ships, and various types of ships. [0003] At present, the domestic large-scale civil symmetrical spherical flat steel for marine use is in the research and development stage, and the rolling process has the following deficiencies: the installation of the guide plate is difficult, the labor intensity of the operators is high, the amount of metal filling in the ball head is insufficient, and the web width a...

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Problems solved by technology

[0003] At present, the domestic large-scale civil symmetrical spherical flat steel for marine use is in the research and development stage, and the rolling process has the following deficiencies: the installation of the guide plate is difficult, the labor intensity of the operators is high, the amount of metal filling in the ball head is insufficient, and the web width accuracy is not high; web wave

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