Tension system optimization method for inhibiting vibration of cold continuous rolling unit

A technology of cold tandem rolling unit and optimization method, which is applied in the field of metallurgical steel rolling, can solve the problems such as no cold tandem rolling unit is given, and achieve the effect of increasing economic benefits of enterprises, broad application prospects, and high-speed and stable rolling process

Active Publication Date: 2020-02-07
BAOSHAN IRON & STEEL CO LTD
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  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned patent is to ensure that there is no slippage, thermal slippage and vibration during the rolling process of the cold tandem rolling mill. The constraint conditions of the optimal tension system of the tandem rolling mill, and no relevant technical solutions are given to solve the vibration problem in the high-speed rolling process of the tandem cold rolling mill

Method used

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  • Tension system optimization method for inhibiting vibration of cold continuous rolling unit
  • Tension system optimization method for inhibiting vibration of cold continuous rolling unit
  • Tension system optimization method for inhibiting vibration of cold continuous rolling unit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] S1, collect the equipment characteristic parameters of the cold tandem rolling mill, including: each stand (5) work roll radius R i ={1#217.5; 2#217.5; 3#217.5; 4#217.5; 5#217.5} (mm), each stand (5) roll surface linear velocity v ri ={1#149.6; 2#292.3; 3#328.3; 4#449.2; 5#585.5} (m / min), original roughness Ra of work rolls of each frame (5 pieces) ir0 ={1#0.53; 2#0.53; 3#0.53; 4#0.53; 5#0.53} (μm), the roughness attenuation coefficient B of each rack (5 pieces) work roll Li ={1#0.01; 2#0.0.1; 3#0.01; 4#0.01; 5#0.01}, the rolling kilometers L of each stand (5 pieces) after the work roll is changed i ={1#200; 2#180; 3#190; 4#220; 5#250}(km), wherein, i=1,2,...,5, representing the stand number of the cold tandem rolling mill;

[0058] S2, collect the key rolling process parameter of strip, comprise: elastic modulus E=206GPa of strip, Poisson's ratio ν=0.3 of strip, strip width B=812mm, each frame (5) strip Inlet thickness h 0i ={1#2.1; 2#1.17; 3#0.65; 4#0.4; 5#0.27} (...

Embodiment 2

[0082] S1, collect the equipment characteristic parameters of the cold tandem rolling mill, including: each stand (5) work roll radius R i ={1#217.5; 2#217.5; 3#217.5; 4#217.5; 5#217.5} (mm), each stand (5) roll surface linear velocity v ri ={1#149.6; 2#292.3; 3#328.3; 4#449.2; 5#585.5} (m / min), original roughness Ra of work rolls of each frame (5 pieces) ir0 ={1#0.53; 2#0.53; 3#0.53; 4#0.53; 5#0.53} (μm), the roughness attenuation coefficient B of each rack (5 pieces) work roll Li ={1#0.01; 2#0.0.1; 3#0.01; 4#0.01; 5#0.01}, the rolling kilometers L of each stand (5 pieces) after the work roll is changed i ={1#220; 2#190; 3#200; 4#240; 5#260}(km), wherein, i=1,2,...,5, representing the stand number of the cold tandem rolling mill;

[0083] S2, collect the key rolling process parameter of strip, comprise: elastic modulus E=210GPa of strip, Poisson's ratio ν=0.3 of strip, strip width B=826mm, each frame (5) strip Inlet thickness h 0i ={1#2.2; 2#1.27; 3#0.75; 4#0.5; 5#0.37} (...

Embodiment 3

[0107] S1, collect the equipment characteristic parameters of the cold tandem rolling mill, including: each stand (5) work roll radius R i ={1#217.5; 2#217.5; 3#217.5; 4#217.5; 5#217.5} (mm), each stand (5) roll surface linear velocity v ri ={1#149.6; 2#292.3; 3#328.3; 4#449.2; 5#585.5} (m / min), original roughness Ra of work rolls of each frame (5 pieces) ir0 ={1#0.53; 2#0.53; 3#0.53; 4#0.53; 5#0.53} (μm), the roughness attenuation coefficient B of each rack (5 pieces) work roll Li={1#0.01; 2#0.0.1; 3#0.01; 4#0.01; 5#0.01}, the rolling kilometers L of each stand (5 pieces) after the work roll is changed i ={1#190; 2#170; 3#180; 4#210; 5#230}(km), wherein, i=1,2,...,5, representing the stand number of the cold tandem rolling mill;

[0108] S2, collect the key rolling process parameter of strip, comprise: elastic modulus E=201GPa of strip, Poisson's ratio ν=0.3 of strip, strip width B=798mm, each frame (5) strip Inlet thickness h 0i ={1#2.0; 2#1.01; 3#0.55; 4#0.35; 5#0.25} (...

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Abstract

The invention discloses a tension system optimization method for inhibiting vibration of a cold continuous rolling unit. The method aims to inhibit the vibration defect in a high-speed rolling processof the cold continuous rolling unit, in order to effectively measure whether vibration appears in a rolling mill, a rolling mill vibration judgment index coefficient is proposed, the minimum mean square error between a rolling mill vibration judgment index coefficient optimal value and a rolling mill vibration judgment index coefficient value solved in an actual rolling process is taken as an optimization objective function taking that the maximum rolling mill vibration judgment index coefficient value of each individual rack is minimum in consideration, an upper threshold value, of an vibration judgment index, solved under an overlubricating state due to the fact that a neutral angle and a bite angle are overlapped in the rolling process and a lower threshold value, of the vibration judgment index, solved under an under-lubrication state due to the fact that the neutral angle is half of the bite angle in the rolling process are taken as constraint conditions, and finally the optimization of a tension system in the rolling process of the cold continuous rolling unit is realized.

Description

technical field [0001] The invention relates to the technical field of metallurgical steel rolling, and more specifically refers to a tension system optimization method for suppressing vibration of a cold tandem rolling mill. Background technique [0002] In recent years, with the rapid development of automobile manufacturing, large ships, aerospace, and food packaging industries, the market demand for strips has continued to increase. At the same time, the demand for high-precision and high-quality products from downstream users has prompted the development of large-scale and high-speed strip production equipment. Considering the complexity of the strip production process and production process, the high-speed strip rolling process is often due to rolling Changes in manufacturing conditions induce vibration in the rolling mill. Once the rolling mill vibrates, alternating light and dark stripes will be formed on the surface of the strip, affecting the surface quality of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B37/48
CPCB21B37/48B21B37/007
Inventor 王康健郑涛
Owner BAOSHAN IRON & STEEL CO LTD
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