Round steel splitting rolling technique

Abstract

The invention discloses a slit rolling technique of round steel, which comprises the following steps: a blank is rolled into parallel rolled pieces after undergoing the stages of rough rolling, medium rolling and precision rolling; the rolled pieces are slit by a slitting wheel for obtaining the round steel rolled pieces, wherein the roll passes with specific structures and sizes including the rhomboid pass, the cinquefoil square pass, the dumbbell-shaped pre-slit pass, the double-circle slitting pass, the ellipse pass and the round pass are sequentially adopted in the medium rolling and the precision rolling stages, the square rolled pieces rolled by the cinquefoil square pass require further slitting and positioning by a slitting wedge, and the point angle Theta of the slitting wedge is60 DEG- 65 DEG; finally each thin and narrow connecting band of the rolled pieces is slit by the slitting wheel on a slitting foreplate, wherein the point angle of the slitting wheel is 90 DEG- 95 DEG. The round steel produced by adopting the slit rolling technique of the invention has good surface quality and high production rate, and the slit rolling process can effectively improve the machine-hour yield of the round steel and increase the production efficiency in a factory.

Description

technical field [0001] The invention belongs to the improvement of the round steel rolling process, in particular to the round steel split rolling process. Background technique [0002] Bar split rolling refers to the rolling of a rolled piece longitudinally divided into two or more rolled pieces by using a special roll pass and guide device or other forms of splitting devices on a bar rolling mill. manufacturing process. Bar slitting and rolling can greatly increase production. After 30 years of development, there are currently four rolling methods: roll slitting, slitting wheel slitting, disc shearing, and flame slitting. However, in recent years, the slitting wheel slitting method has been widely promoted and widely used. The slitting wheel slitting method has high slitting accuracy, simple equipment, convenient adjustment, and is suitable for multi-line slitting, which meets the needs of steel rolling production. Efficient and stable production requirements. Since the...

AI Technical Summary

Problems solved by technology

The shape of the torn part of the slitting strip and the size of the "fold" directly affect the quality of the finished product. Therefore, the slitting and rolling technology used in domestic continuous rolling mills is used for rolling rebar instead of The reason for cutting round steel is that the roll pass design is unreasonable, so it cannot effectively eliminate the quality defects such as folds and ears at the tear of the cutting belt, so it cannot be used to cut rolled round steel

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