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Low-temperature control rolling and splitting process method and device for ribbed steel bars

A ribbed steel bar, low temperature controlled rolling technology, applied in workpiece cooling devices, temperature control, manufacturing tools, etc., can solve problems that have not yet been disclosed, and achieve the effects of reducing economic and social benefits, stable production, and reasonable structural design

Active Publication Date: 2016-02-03
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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  • Low-temperature control rolling and splitting process method and device for ribbed steel bars
  • Low-temperature control rolling and splitting process method and device for ribbed steel bars

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

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

[0024] (2) Send the steel billet heated in step (1) into six rolling mills of the roughing rolling mill for rolling. into Φ71 round bars;

[0025] (3) The round bars rolled out in step (2) are sent to the 4th rolling mill of the middle rolling group for rolling after No. 1 flying shear head and tail. The pass system of the 4 middle rolling mills is ellipse-circle 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 head and tail by No. 2, it is sent to the 2 rolling mills of the pre-finishing rolling mill for pre-segmentation. The pass of the pre-finish...

Embodiment 2

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

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

[0034] (2) Send the steel billet heated in step (1) into six rolling mills of the roughing rolling mill for rolling. into Φ71 round bars;

[0035] (3) The round bar rolled out in step (2) is sent to the middle rolling mill for rolling with the 3rd rolling mill after the No. 1 flying shear head and tail. The pass system of the 3rd middle rolling mill is ellipse-circular 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 head and tail by No. 2, it is sent to the 2 rolling mills of the pre-finishing rolling mill for pre-segmentation. The pass of the pre-finishing rolli...

Embodiment 3

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

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

[0044] (2) Send the steel billet heated in step (1) into six rolling mills of the roughing rolling mill for rolling. into Φ71 round bars;

[0045](3) The round bar rolled out in step (2) is sent to the middle rolling mill for rolling with the 3rd rolling mill after the No. 1 flying shear head and tail. The pass system of the 3rd middle rolling mill is ellipse-circular 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 head and tail by No. 2, it is sent to the 2 rolling mills of the pre-finishing rolling mill for pre-segmentation. The pass of the pre-finishing rolling mi...

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Abstract

The invention discloses a low-temperature control rolling and splitting process method for ribbed steel bars. The method comprises the steps of (1), heating square billets to 960-1000 DEG C; (2), conveying the square billets to a rough rolling unit for rolling and rolling the square billets to form round bars; (3), after a first flying shear shears the heads and the tails of the round bars, conveying the round bars to an intermediate rolling unit to form rectangular bars; (4), after a second flying shear shears the heads and the tails of the rectangular bars, conveying the rectangular bars to a finish rolling unit for pre-splitting and rolling the rectangular bars to form rolled pieces shape like dog bones; (5), conveying the rolled pieces to a control rolling and through water cooling device for through water cooling; (6), after a third flying shear shears the heads and the tails of the rolled pieces, rolling the rolled pieces in the finish rolling unit to form a plurality of the independent ribbed steel bars; (7), conveying the ribbed steel bars to a post-rolling control cooling and through water cooling device for cooling; (8) conveying the ribbed steel bars to a multi-length flying shear for multi-length sectioning and then conveying the sectioned steel bars to a cooling bed. According to the invention, the production efficiency is greatly improved, and the economic benefits and social benefits are great because the rolling energy consumption is greatly lowered, the addition amount of alloy is greatly lowered and mine exploitation is greatly reduced.

Description

Technical field: [0001] The invention relates to a process method and device for cutting ribbed steel bars by low-temperature controlled rolling. Background technique: [0002] At present, in the field of ribbed steel bar rolling bars in the steel industry, several typical process methods are: 1. Single-wire rolling. At present, it is mainly used in the production of large-scale bars, and some production lines with relatively backward technology also use single-wire 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 wire 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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IPC IPC(8): B21B1/20B21B15/00B21B37/74B21B45/02
CPCB21B1/20B21B15/0007B21B37/74B21B45/0203
Inventor 王长生尚振军肖立军刘晓东张红雁马庆水邓兆征陈红雷
Owner SHANDONG SHIHENG SPECIAL STEEL GROUP
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