Parameter Optimization Method for Reducing Minimum Rolling Distortion Between Secondary Cold Rolling

A technology of secondary cold rolling and deformation, which is applied in the direction of metal rolling and contour control, etc., to achieve the effect of reducing the maximum thickness fluctuation and average plate shape wave value, reducing the minimum deformation, and reducing the minimum deformation

Active Publication Date: 2020-07-28
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the above problems, on the basis of a large number of field experiments and theoretical research, the present invention provides parameters for reducing the minimum rolling deformation in the secondary cold rolling under the premise of ensuring that the unit does not slip and jump. Optimization method, this method establishes a set of process parameter optimization setting schemes suitable for the secondary cold rolling unit with the goal of reducing the minimum deformation, and establishes that the jumping and slipping phenomena under small deformations are transformed into rolling pressure, slipping The mathematical modeling of the factors calculates the optimal relevant process parameters and the corresponding limit deformation. Under the premise of ensuring rolling stability, the limit deformation capacity of the secondary cold rolling unit is improved, so as to develop high-end DR materials for new applications. , to promote technological progress

Method used

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  • Parameter Optimization Method for Reducing Minimum Rolling Distortion Between Secondary Cold Rolling
  • Parameter Optimization Method for Reducing Minimum Rolling Distortion Between Secondary Cold Rolling
  • Parameter Optimization Method for Reducing Minimum Rolling Distortion Between Secondary Cold Rolling

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Experimental program
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Effect test

Embodiment 1

[0112] -Applied to DR materials with typical specifications, the optimal setting of rolling process parameters aimed at reducing the minimum deformation:

[0113] 1) Collect the main equipment and process parameters of the cold rolling mill, mainly including the following steps:

[0114] 1a) Collect the roll process parameters of the cold rolling mill, mainly including: work roll radius R = 221.0mm, surface roughness Ra r = 0.65μm, the elastic modulus E of the work roll = 2.06×10 5 MPa, Poisson's ratio of work roll γ=0.3;

[0115] 1b) Collect the relevant rolling process parameters of the cold rolling mill, mainly including: the average deformation resistance K of the strip m =475MPa and yield strength σ s =235Mpa, strip width B=966mm, incoming material thickness h 0 =0.275mm, normal rolling speed v=496m / min, rolling pressure setting value P′=1000kN, the minimum reduction rateε under the current working condition min = 10%;

[0116] 1c) Collect process lubrication system...

Embodiment 2

[0135] -Optimized setting method of lubricating process parameters aiming at reducing minimum deformation for DR materials of typical specifications.

[0136] 1) Collect the main equipment and process parameters of the cold rolling mill, mainly including the following steps:

[0137] 1a) Collect the roll process parameters of the cold rolling mill, mainly including: work roll radius R = 215.6mm, surface roughness Ra r =0.75μm, the modulus of elasticity of the work roll E=2.06×10 5 MPa, Poisson's ratio of work roll γ=0.3;

[0138] 1b) Collect the relevant rolling process parameters of the cold rolling mill, mainly including: the average deformation resistance K of the strip m =475MPa and yield strength σ s =235MPa, strip width B=928mm, incoming material thickness h 0 = 0.261mm, normal rolling speed v = 580m / min, rolling pressure setting value P' = 1000kN, unit front tension σ 1 =128Mpa, unit back tension σ 0 =81Mpa, the minimum reduction rate ε under the current working c...

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Abstract

The invention provides a parameter optimization technology for reducing the minimum rolling deformation during secondary cold rolling. Through the parameter optimization technology, a mathematical model which can convert the jumping and slippage phenomenon under small deformation into rolling pressure and a slippage factor can be established and is used for computing optimum related technologicalparameters and the corresponding limit deformation; on the premise of ensuring the rolling stability, the limit deformability of a secondary cold rolling unit is improved, a high-end DR material novel-purpose product is developed, and technological progress is promoted. Through implementation of the parameter optimization technology for reducing the minimum rolling deformation during secondary cold rolling, the minimum deformation of the DR material is further reduced, meanwhile, the maximum thickness fluctuation and the average plate shape wave value are reduced synchronously, and the DR material minimum deformation of the secondary cold rolling unit is effectively reduced.

Description

technical field [0001] The invention relates to the field of improvement and optimization of process parameters, in particular to a parameter optimization method applied to reduce the minimum rolling deformation in the secondary cold rolling, aiming at reducing the minimum deformation to ensure stable rolling. Background technique [0002] As most users of secondary cold-rolled strips shift from low-end to high-end, higher and higher requirements are placed on the ultimate deformation capacity of secondary cold-rolling units. High-grade DR materials (thinner DR materials are used for Alternative cold-rolled materials) development and production has become an important symbol to measure the production level of enterprises. [0003] At present, the typical reduction rate of the tempering unit under the existing technology is ≤3%, and the typical reduction rate of the secondary cold rolling unit is ≥15%. In the actual production process, when the reduction rate is lower than 10...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B37/28
CPCB21B37/28B21B2263/04
Inventor 李秀军王康健瞿培磊
Owner BAOSHAN IRON & STEEL CO LTD
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