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Round steel splitting rolling technique

A technology for slitting rolling and round steel, which is applied in the improvement field of round steel rolling process, can solve the unreasonable design of roll pass, cannot effectively eliminate the folded quality defect at the tear of the slitting belt, and cannot be slitted and rolled. problems such as making round steel, to achieve the effect of fast speed, reasonable design, and improved machine-hour output

Inactive Publication Date: 2008-11-19
XINJIANG BAYI IRON & STEEL
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  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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  • Round steel splitting rolling technique
  • Round steel splitting rolling technique
  • Round steel splitting rolling technique

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Embodiment Construction

[0021] A kind of round steel slitting and rolling process, such as Figure 1 to Figure 10As shown, after the rough rolling, intermediate rolling and finishing rolling stages, the billet is rolled into a parallel rolling piece, and then cut into a round steel rolling piece by a cutting wheel. The roll passes used in the intermediate rolling and finishing rolling stages are sequentially It is flat diamond pass 1, plum blossom square pass 2, dumbbell-shaped pre-cut pass 3, double circular cut pass 4, oval pass 5 and circular pass 6, the above-mentioned passes The structural size of the flat rhombus pass type 1 (in millimeters) is: Bk1=49.05-49.1, H1=24.1-24.5, S1=2.9-3.1, R1≥17; the structural size of the plum blossom square pass type 2 is: Bk2 ≤42.6, H2=22.6-22.9, R2>6.8, S21.2, S3=1.8-2.1, φ=27.7°; the structural dimensions of the double-circular cut pass type 4 are: Bk4=69.1-69.15, bk4=32.02-32.1, Hk4=27-27.05, R4>1.2, S4=2.8-3.1, φ≤38°, 2θ≤60°; the structure size of oval pas...

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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 is 60 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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B1/16B21B27/02
Inventor 李子文肖国栋韩文锋孔利明谢国谊魏新疆程建华
Owner XINJIANG BAYI IRON & STEEL
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