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A process method and device for splitting ribbed steel bars by low-temperature controlled rolling

A ribbed steel bar, low-temperature controlled rolling technology, applied in the direction of workpiece cooling device, temperature control, metal rolling, etc., can solve undisclosed problems, achieve the effects of reducing economic and social benefits, stable production, and reasonable structural design

Active Publication Date: 2017-10-31
SHANDONG SHIHENG SPECIAL STEEL GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no report of split rolling in the low temperature finish rolling state in domestic and foreign literature.

Method used

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  • A process method and device for splitting ribbed steel bars by low-temperature controlled rolling
  • A process method and device for splitting ribbed steel bars by low-temperature controlled rolling

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Such as figure 2 As shown, the Φ12 ribbed steel bar adopts the five-splitting low-temperature controlled rolling process, and the following steps are taken:

[0023] (1) Select a billet of a certain length with a height×width of 165mm×165mm as the billet, and heat it to 960-1000℃ in a heating furnace;

[0024] (2) The heated billet in step (1) is sent to the roughing mill with 6 rolling mills for rolling. The 6 roughing mills adopt a box-box-ellipse-circle-ellipse-round pass system. Into a round bar of Φ71;

[0025] (3) After the round bar rolled in step (2) is cut by No. 1 fly, it is sent to the 4 rolling mills of the middle rolling group for rolling. The pass system of the 4 middle rolling mills is oval-round Hole-flat roll-flat roll, rolled into a rectangular bar with a size of 17.9±0.5mm×89±0.5mm;

[0026] (4) After the rectangular bar rolled in step (3) is cut by No. 2 flying head and tail, it is sent to the second rolling mill of the pre-finishing mill for pre-cutting....

Embodiment 2

[0032] Such as figure 2 As shown, the Φ18 ribbed steel bar adopts the three-splitting low-temperature controlled rolling process, and the following steps are taken:

[0033] (1) Select a billet of a certain length with a height×width of 165mm×165mm as the billet, and heat it to 960-1000℃ in a heating furnace;

[0034] (2) The heated billet in step (1) is sent to the roughing mill with 6 rolling mills for rolling. The 6 roughing mills adopt a box-box-ellipse-circle-ellipse-round pass system. Into a round bar of Φ71;

[0035] (3) After the round bar rolled in step (2) is cut by the head and tail on the No. 1 fly, it is sent to the three rolling mills of the middle rolling group for rolling, and the pass system of the three middle rolling mills is oval-round Hole-flat roll, rolled into a rectangular bar with a size of 25.6±0.5×72±0.5mm;

[0036] (4) After the rectangular bar rolled in step (3) is cut by No. 2 flying head and tail, it is sent to the second rolling mill of the pre-finis...

Embodiment 3

[0042] Such as figure 2 As shown, the Φ25 ribbed steel bar adopts the two-splitting low-temperature controlled rolling process method, including the following steps:

[0043] (1) Select a billet of a certain length with a height×width of 165mm×165mm as the billet, and heat it to 960-1000℃ in a heating furnace;

[0044] (2) The heated billet in step (1) is sent to the roughing mill with 6 rolling mills for rolling. The 6 roughing mills adopt a box-box-ellipse-circle-ellipse-round pass system. Into a round bar of Φ71;

[0045] (3) After the round bar rolled in step (2) is cut by the head and tail on the No. 1 fly, it is sent to the three rolling mills of the middle rolling group for rolling, and the pass system of the three middle rolling mills is oval-round Hole-flat roll, rolled into a rectangular bar with a size of 34.5±0.5mm×70±0.5mm;

[0046] (4) After the rectangular bar rolled in step (3) is cut by No. 2 flying head and tail, it is sent to the second rolling mill of the pre-fi...

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Abstract

The invention discloses a low-temperature controlled-rolling cutting process for ribbed steel bars, which comprises the following steps: (1) heating the billet to 960‑1000°C; (3) After No. 1 fly-cut head and tail, it is sent to the intermediate rolling unit to be rolled into a rectangular bar; (4) After No. 2 fly-cut head and tail, it is sent to the pre-finishing rolling unit Carry out pre-segmentation and roll into a dog-bone-shaped rolling piece; (5) send it to the controlled rolling water penetration device for water cooling; (6) after the rolled piece enters the head and tail of the No. (7) sent to the post-rolling controlled cooling water penetration device for cooling; (8) sent to double-scale flying shears for double-scale segmentation, and then into the cooling bed. The invention not only realizes the huge economic and social benefits brought about by greatly improving production efficiency and greatly reducing rolling energy consumption, but also realizes greatly reducing the amount of alloy added and greatly reducing the huge cost caused by mining. economic and social benefits.

Description

Technical field: [0001] The invention relates to a low-temperature controlled rolling and cutting process method and device for ribbed steel bars. Background technique: [0002] At present, in the field of rolled steel bars with ribbed steel bars in the steel industry, several typical processes are: 1. Single-line rolling. At present, it is mainly used in the production of large-size bars, and some production lines with relatively backward technology also use single-line rolling. 2. Split rolling technology. Split rolling technology has been widely used because of its outstanding advantages such as improving efficiency, reducing rolling passes, and reducing the number of rolling mills in new production lines. 3. Controlled rolling technology + single-line rolling technology. Controlled rolling and controlled cooling technology has been widely used in single-strand rolling because of its remarkable feature that controlled rolling and controlled cold rolling can greatly reduce a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B1/20B21B15/00B21B37/74B21B45/02
CPCB21B1/20B21B15/0007B21B37/74B21B45/0203
Inventor 王长生肖立军朱强尚振军张红雁马庆水刘晓东邓兆征周志军陈红雷
Owner SHANDONG SHIHENG SPECIAL STEEL GROUP