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A roll pass optimization method that can improve the service life of section steel rolls

A technology of pass optimization and rolling, applied in the direction of rolling, metal rolling, metal rolling, etc., to reduce uneven wear, improve wear state, and increase service life

Active Publication Date: 2015-11-18
ANGANG STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to reduce the cutting amount of the roll repair and improve the service life of the steel roll by changing the wear state of the roll in the section steel rolling process and reducing the uneven wear of the roll

Method used

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  • A roll pass optimization method that can improve the service life of section steel rolls
  • A roll pass optimization method that can improve the service life of section steel rolls
  • A roll pass optimization method that can improve the service life of section steel rolls

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 160

[0044] Example 1 Take the optimization of the roll pass of a 60kg / mU75V rail roughing mill as an example

[0045] (1) Model and calculate the rolling process under the target rolling process

[0046] First, the rolling process prediction model is established, and the cross-sectional size of the billet of the 60kg / m rail rolling stock is 230mm×230mm, and the three-dimensional model of the rolling stock is established. Initial pass and roll model establishment; then input the rolling material U75V performance parameters (specific heat, thermal conductivity, stress-strain curve, elastic modulus, Poisson's ratio, thermal expansion coefficient, density), contact friction coefficient between the roll and the rolling piece 0.4 and the contact heat transfer coefficient 6, define the thermal work conversion coefficient as 0.9. The deformation, rolling force F, contact stress and temperature change of the rolled piece were obtained by using the finite element method.

[0047] (2) Pred...

Embodiment 275

[0090] Embodiment 2 Take the optimization of roll pass of 75kg / mU71Mn rail roughing mill as an example

[0091] (1) Model and calculate the rolling process under the target rolling process

[0092] Firstly, the rolling process prediction model is established, and the cross-sectional size of the 75kg / m rail rolling stock is 230mm×230mm, and the three-dimensional model of the rolling stock is established. The 75kg / mU71Mn rail roughing mill adopts the five-pass rolling method, and the roll specification and Initial pass and roll model establishment; then input the performance parameters of rolling material U71Mn (specific heat, thermal conductivity, stress-strain curve, modulus of elasticity, Poisson’s ratio, thermal expansion coefficient, density), contact friction coefficient between roll and rolling piece 0.43 and a contact heat transfer coefficient of 6, define the thermal work conversion coefficient as 0.9. The deformation, rolling force F, contact stress and temperature ch...

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Abstract

The invention discloses a roll pass optimizing method capable prolonging shaped roll service life. The method is characterized by including the steps of firstly, building a mathematic model to calculate the rolling state of a rolled piece under a target rolling process; secondly, predicting roll abrasion condition under current production process conditions, evaluating roll abrasion state, and converting roll abrasion quantity into roll repairing quantity; thirdly, optimizing roll passes and the rolling process by evaluating roll cutting quantity. By the method, roll abrasion state is effectively changed during profile rolling, roll uneven abrasion is reduced, cutting nonuniformity during roll repairing is improved, turning quantity required by each roll pass recovery is reduced by 3-10mm, roll turning times are increased by 1-2, and the service life of shaped rolls is prolonged.

Description

technical field [0001] The invention relates to the field of metal rolling equipment, in particular to a method for using a sectioned steel roll, in particular a method for optimizing a roll pass for improving the service life of a sectioned steel roll. Background technique [0002] The section steel rolling process is the process of rolling a billet of a certain size into a product with a regular shape and meeting the requirements of use. The section steel rolling process is a high-temperature, large-deformation, and large-reduction processing process. The passes of each pass are completely different, and there are also significant differences in the processing effect on the rolled piece. The design of the shape of the section steel roll includes the design of different passes and the setting of the position of the rolling line. The design results directly affect the deformation process, biting in and out of the rolled piece, as well as the wear state and distribution of th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B27/02B21B38/00
Inventor 原思宇李文斌李广龙赵坦金继勇杨玉陈昕丁宁左岩
Owner ANGANG STEEL CO LTD
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