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Rolling method of wedge-shaped blank

A wedge-shaped billet and wedge-shaped technology, used in metal rolling, metal rolling, rolling mill control devices, etc., can solve the problems of poor squareness, low yield and poor shape characteristics of steel plates, and achieve the elimination of width differences and maximum efficiency. , the effect of improving the utilization rate of raw materials

Pending Publication Date: 2022-05-13
NANJING IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the rolling of wedge-shaped billets, due to the poor original shape characteristics of the billets, leads to a very low yield during rolling, and the rectangularity of the steel plate after rolling is very poor.

Method used

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  • Rolling method of wedge-shaped blank
  • Rolling method of wedge-shaped blank

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0017] This embodiment provides a rolling method of a wedge-shaped billet, assuming that the original state of the wedge-shaped billet is that the width of the slab at the small end is W 1 , the slab thickness is T 1 , the width of the big end slab is W 2 , the slab thickness is T 2 , the slab length is L, W 1 2 ,T 1 2 , the rolling target width of the roughing mill is W, and it is characterized in that rolling method comprises the steps:

[0018] (1) Longitudinal rolling to eliminate thickness difference:

[0019] The control rolling mill rolls along the length direction of the wedge-shaped billet to eliminate the thickness difference of the slab and form a slab with uniform thickness.

[0020] At this time, the thickness of the slab at the small head end T 1 '=T 1 , Thickness of slab at bulk end T 2 '=T 1 ’, the width of the slab at the small end remains unchanged, W 1 '=W 1 , the width of the large end slab remains unchanged, W 2 '=W 2 , slab length

[0021]...

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Abstract

The invention discloses a rolling method of a wedge-shaped blank, which is characterized in that the thickness difference of a plate blank is firstly eliminated through several passes before longitudinal rolling, and then the width difference of the plate blank is further eliminated through a reverse plate blank thickness difference caused by a subsequent longitudinal rolling pass. According to the method, the rolling process is optimized, the rolling yield of the wedge-shaped blank is increased by about 15%, the efficiency is maximized when the wedge-shaped blank is rolled, and the raw material utilization rate of the wedge-shaped blank is effectively increased.

Description

technical field [0001] The invention belongs to a steel rolling process in the field of metallurgy, in particular to a method for effectively improving the rolling rectangle of a wedge-shaped billet, and is an effective method for improving the rolling benefit of a wedge-shaped billet. Background technique [0002] With the progress of society and the development of iron and steel enterprises, the requirements for the control of production costs are becoming more and more stringent. As a very important technical and economic index, the yield rate is very important how to optimize it. At present, in the rolling of wedge-shaped billets, due to the poor original shape characteristics of the billet, the yield of the wedge-shaped billet is very low during rolling, and the rectangularity of the steel plate after rolling is very poor. [0003] Therefore, how to eliminate the original blank shape defect of the wedge-shaped blank during rolling is very important. Especially in the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B1/02B21B37/16
CPCB21B1/026B21B37/16B21B2001/028
Inventor 李灿姚海斌徐益平胡永斌陈天强杨晓东
Owner NANJING IRON & STEEL CO LTD
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