Slitting and rolling method of ф13mm rebar

Abstract

A slitting rolling method of a 13mm deformed steel bar includes the steps that a thrice-slitting-rolling is adopted, 150 square blanks sequentially pass through 6 rough rolling units, a rolled piece is machined into flat steel after seven-pass rolling of 8 intermediate rolling units, the flat steel is centered and enters a 16H / V slitting rolling mill after entering pre-segmenting hole pattern machining of a 15H refined rolling mill, the difference between the interval of two middle holes in the pre-segmenting design and the interval of two middle holes in the segmenting hole pattern design is only 0.1mm, and therefore it can be ensured that a pre-segmented rolling piece shaped like a dog bone is centered accurately in segmenting hole patterns and rolled into three parallel rolled pieces with 0.9mm tough belts, the three parallel rolled pieces are segmented into three independent rolled pieces through double-blade segmenting wheels which are arranged on an outlet of the 16H / V slitting rolling unit and capable of conducting segmenting, guiding and guarding, and the three rolled pieces independently enter a rolling groove passageway of a 17H rolling mill and a rolling grove passageway of a 18H / V rolling mill and are rolled into three reinforcing steel bars which are the same in size and shape, have the 13mm diameter and are provided with ribs. Compared with a twice-slitting-rolling process, the machine yield can be improved by 17% through the production process; meanwhile, the rolling speed is lowered, the device can stably run, and production efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of slitting and rolling of threaded steel, and in particular relates to a slitting and rolling method of Ф13mm threaded steel. Background technique [0002] In the production of threaded steel bars, a billet is rolled by the rough rolling unit and the intermediate rolling unit, and the rolled piece is cut into two or more parallel rolled pieces in the finishing rolling unit, which is called split rolling. [0003] The steel grades involved in the American standard ASTMA615 / A615M-08b are 3, 4, 5, 6, 7, 8, 9, 10, 11, 14, 18, and the corresponding nominal diameters are 10, 13, 16, 19, 22, 25 , 29, 32, 36, 43, 57. The conventional grades of American standard rebar export are 3, 4, 5, 6, 7, 8, 10, 11, of which grades 4 and 6 correspond to the nominal diameter of steel bars 13mm and 19mm, and the hot-rolled ribbed steel bars for concrete in my country implement the standard GB1499.2 - In 2007, there is no 13mm an...

AI Technical Summary

Problems solved by technology

Invention patent CN101992211A, "The production process of 13 mm British standard ribbed steel bars by two splits", describes the production of 13 mm British standard rebar by two split rolling processes, and the production efficiency is low

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