Dynamic thickening rolling process of controlling break of cold rolled thin strip steel

A thin strip, dynamic technology for metal rolling, metal rolling, mill controls, etc.

Inactive Publication Date: 2008-08-20
ANSHAN IRON & STEEL GROUP CORPORATION +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Thus solving the technical problem of producing cold-rolled thin strip steel with thickness less than 0.5mm

Method used

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  • Dynamic thickening rolling process of controlling break of cold rolled thin strip steel
  • Dynamic thickening rolling process of controlling break of cold rolled thin strip steel
  • Dynamic thickening rolling process of controlling break of cold rolled thin strip steel

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Embodiment Construction

[0038] According to the technology provided by the present invention, the tandem cold rolling mill is tried out at 5 stands, and the thin gauge product of 0.3mm is produced, and the control process and process parameters are as follows:

[0039] 1) Strip width B=1030mm, tensile strength Rm=600Mpa, finished product pass tension T=3078Kg;

[0040] 2) The rolling speed v=3.0m / s near the weld;

[0041] 3) Set strip thickness h 0 、h 2 (h 2 =h 0 ) and target thickness h 1 , h 2 =h 0 = 0.3 mm, h 1 =0.45mm;

[0042] 4) Set the distance L from the control point to the weld, take L=10m;

[0043] 5) Apply the formulas (3) and (4) to calculate the slope K=1.5*10 -5 ;

[0044] 6) The above parameters are automatically calculated and transmitted to the control system;

[0045] 7) Utilize the existing seam tracking system, when the distance before the seam reaches the 1# frame is L=10m, start the first wedge rolling process;

[0046] 8) When the weld seam reaches the 1# frame, t...

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Abstract

The dynamic thickening rolling process of controlling break of cold rolled thin strip steel has weld seam tracking system used in measuring the weld seam position accurately, and features that in the range of 50 m around the weld seam, the strip steel thickness is increased to 1.0-1.5 times the original target thickness. Two wedge rolling processes are used to increase the rolled thickness dynamically, so as to lower the break rate of the thin rolled material. The present invention has the advantages of reduced strip steel breaking rate, high production efficiency, etc. and is suitable for multi-frame continuous cold rolling machine with 4, 5 or 6 frames.

Description

technical field [0001] The invention belongs to the field of pressure processing of metal materials, in particular to a dynamic thickening and rolling method for controlling broken strips of cold continuous rolling thin strips. Background technique [0002] In the prior art, rolling thin-gauge cold-rolled steel strip generally has technical problems such as high strip breakage rate, low production efficiency, and low yield, especially for products with a thickness less than 0.3mm. Taking the 4-stand 4-high tandem cold rolling mill in a factory as an example, the strip breakage rate of strips with a thickness less than 0.5mm was as high as 28.7%, resulting in a low yield and long downtime due to strip breakage, resulting in low production efficiency. Therefore, products with a thickness below 0.3 mm cannot be produced basically. [0003] For this reason, the 5-stand cold tandem rolling mill has been transformed. After modification, although products with a thickness less th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B37/20B21B38/04
Inventor 刘玠姚林于宁俞晓峰李丽霞胡洪旭曹丕智曹凯
Owner ANSHAN IRON & STEEL GROUP CORPORATION
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