Four-line segmentation rolling technology of deformed steel bar with diameter of 10mm

Abstract

The invention relates to a four-line segmentation rolling technology of a deformed steel bar with a diameter of 10mm, and the technology is characterized in that 150 square billets are sequentially rolled by six rough rolling units and 8 medium rolling units, rolled pieces are machined into flat steel, the rolled pieces then enter a fine rolling unit 15H to be machined into 0.4-mm dog-bone-shaped rolled pieces with the size of the middle part being smaller than that of the two sides, the rolled pieces enter a 16 H / V frame rolling machine for segmentation in a centering way, because the distance of two middle holes is identical in the design of the pre-segmentation and a segmentation hole, the rolled pieces under the pre-segmentation can be precisely centered in the segmentation hole, the rolled pieces are rolled into four parallel-connection rolled pieces with a ligament of 0.7mm, then the four parallel-connection rolled pieces are subjected to three-time segmentation through a front segmentation wheel and a rear segmentation wheel, which are installed on a 16 H / V outlet, then the two middle parallel-connection rolled pieces are twice cut into four independent rolled pieces, the four rolled pieces respectively and individually enter a roll groove passage of 17H and 18H / V frame rolling machines to be respectively rolled into four deformed steel bar finished products with the diameter of 10mm, the same size and the same shape. Through the technology, the yield per hour of the deformed steel bar with the diameter of 10mm is increased, the production cost is reduced, the production efficiency is increased, and the labor intensity of operators is alleviated.

Description

technical field [0001] The invention belongs to the technical field of slitting and rolling process of rebar, in particular relates to a four-wire slitting and rolling process of ф10mm rebar. Background technique [0002] The principle of bar split rolling is to roll the billet into slabs on the bar rolling mill, and then process the slabs into two or For the above parallel rolled pieces with the same cross-sectional area, the parallel rolled pieces are cut longitudinally into independent rolled pieces with the same cross-sectional area in the cutting pass of the finishing rolling mill, and rolled into multiple pieces with the same shape and size in the last two passes. finished product. [0003] Two-wire and three-wire split-rolling technologies have been applied in many bar production lines at home and abroad, but four-wire split-rolling technology is more difficult, and there are few application manufacturers, such as a double-bar with a 6-8-4 process layout Each produc...

AI Technical Summary

Problems solved by technology

However, for the four-slit rolling process, the production difficulty is increased. First, the distance between the intermediate rolling unit and the finishing rolling unit is long, and the rolled pieces coming out of the intermediate rolling mill are prone to twisting during the 56-meter passage; secondly, the rolling mill The temperature drop at the head of the piece is large, and the pre-slitting pass deformation is uneven when entering the finishing rolling unit, which is easy to cause piles of steel in the finishing rolling area

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