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A strip width control method for hot-rolled wedge-shaped billet

A width control, wedge-shaped billet technology, applied in the direction of metal rolling stands, metal rolling mill stands, etc., can solve the problem that the overall control accuracy of the slab width is not high enough, and achieve the effect of improving the width control accuracy

Active Publication Date: 2020-09-25
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a strip width control method for hot-rolled wedge-shaped slabs to solve the problem that the overall control accuracy of the slab width in the existing control method is not high enough

Method used

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  • A strip width control method for hot-rolled wedge-shaped billet
  • A strip width control method for hot-rolled wedge-shaped billet
  • A strip width control method for hot-rolled wedge-shaped billet

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Experimental program
Comparison scheme
Effect test

Embodiment

[0079] Actual strip produced (all data in "mm"):

[0080] Inlet Head Width: 1171.072

[0081] Inlet Tail Width: 1242.9044

[0082] Wedge start position: 1200.0

[0083] Wedge End Position: 10630.0

[0084] Slab length: 10760.0

[0085] Incoming material thickness: 222.0

[0086] (1) Calculation of rough rolling target width and horizontal roll load setting:

[0087] Rough rolling target width: 1092.1355

[0088] R1 horizontal roll reduction: 20.295826, 36.111572, 30.270874

[0089] R2 horizontal roll reduction: 34.849052, 33.158211, 25.261719

[0090] (2) Based on the large end of the wedge-shaped billet, determine the load distribution of the SP large side pressure and the vertical roll, and determine the reduction of each pass of the rough rolling large end

[0091] Large side pressure target: 1062.896

[0092] Large side pressure dog bone: 23.430

[0093] Maximum side pressure reduction: 210.74303

[0094] R1 horizontal roll inlet thickness: 242.91177

[0095] R...

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Abstract

The invention relates to a hot-rolled wedge-shaped blank strip steel width control method. The control method comprises the steps that the rough rolling objective and load distribution are completed according to the width of an incoming material of a large head at first; width reduction of all passes of a small head is determined according to the outlet width objective, determined by the large head, of all passes; and reduction is controlled through the large head and the small head of a plate blank, an on-site connection control curve is subjected to long-stroke control, and finally, rectangular control over the plate blank is achieved. According to the control method, the control precision is greatly improved, and the problem that the overall control precision of the width of a plate blank in an existing control method is not high enough is solved.

Description

technical field [0001] The invention relates to the technical field of steel rolling control, in particular to hot-rolled steel rolling, and in particular to a method for controlling the strip width of a hot-rolled wedge-shaped billet. Background technique [0002] In order to improve production efficiency, Baosteel continuous casting adopts online width adjustment technology. During the continuous casting width adjustment process, wedge-shaped slabs will be produced. [0003] Application No. 201210211053.9 discloses a hot-rolled width control method for wedge-shaped slabs, which mainly classifies and controls slabs with different wedge-shaped degrees. The claimed rights are mainly reflected in different control strategies, such as dividing the wedge-shaped degree into three levels (less than 20mm, 20mm to 40mm, and above 40mm), select different short-stroke control strategies and long-stroke control strategies for different wedges. [0004] Application No. 201210211043.5 d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B37/22
Inventor 张健民沈际海
Owner BAOSHAN IRON & STEEL CO LTD
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