Middle-thickness board-shape control method

A technology of plate shape control and finished product thickness, applied in the direction of contour control, etc., can solve problems such as steel plate waves, achieve the effects of shortening production cycle and delivery time, great economic benefits, and saving gas resources

Active Publication Date: 2007-11-14
ANGANG STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method for controlling the shape of a medium-thick plate that can solve the problem of waves appearing in the steel plate after rolling

Method used

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Examples

Experimental program
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Embodiment Construction

[0008] A method for controlling the shape of a medium-thick plate. The opening of the roll gap in the final pass is set to the thickness of the finished product + 1 mm to + 2 mm, which can reduce the wave shape of the steel plate exiting the four rolls and provide conditions for the straightening of the straightening machine.

[0009] The rolling process is completed by using the rolling process of even pass and smooth pass.

[0010] In the original process of rolling medium and thick steel plates, the last pass is empty, that is, the roll gap value of the last pass is equal to the roll gap value of the first pass, and the condition for judging that the rolling pass is the last pass is, when rolling When the braking force changes from ≥500 tons to <500 tons, the steel throwing state of the last pass will automatically return the pass number to the first pass, and at the same time, the roll gap will be placed at the corresponding set position, so that the previous billet will be...

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Abstract

The present invention relates to a heavy and medium plate shape control method. Said method is characterized by including the following steps: setting roll gap opening of end pass and making it be finished product thickness + 1mm - 2mm and adopting rolling procedure of even-numbered pass plus planishing pass to implement said rolling process.

Description

technical field [0001] The invention relates to a method for controlling the shape of a medium-thick plate, which belongs to the technical field of rolling. Background technique [0002] At present, medium and heavy plate mills generally use medium plate rolling mills when rolling thicker steel plates, and when rolling thick steel plates with a thickness of more than 30 mm and high strength (including SM490A , HQ550, DH32, DH36 and other steel types), due to the small rolling force and small reduction in each pass, there is a phenomenon of buckling in the steel plate. Due to the buckling of the steel plate, the steel plate collides violently with the roller table after leaving the rolling machine, resulting in There is a large wavy plastic deformation at the edge of the steel plate after rolling. On the premise that the capacity of the straightening machine is not large enough, the wave shape of the edge of the steel plate cannot be fundamentally resolved after straightenin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B37/28
Inventor 李凡刘静涛巴山陈华王永才张弘昕王泽孝
Owner ANGANG STEEL CO LTD
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