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Prediction method of oil film thickness on upper and lower surfaces of strip steel in rolling deformation zone of secondary cold rolling mill

A technology of oil film thickness and secondary cold rolling, applied in the field of cold rolling, can solve the problem of no oil film thickness research, and achieve the effect of reducing production cost, improving lubricating performance, and improving enterprise efficiency

Active Publication Date: 2019-02-01
唐山格诺金属科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the oil film thickness in the deformation zone during strip rolling, many scholars have carried out theoretical analysis and experimental research, but they are all aimed at the oil film thickness in the deformation zone of the cold rolling emulsion circulation system under sufficient lubrication conditions, not for the secondary cold rolling. Study on the oil film thickness formed in the rolling deformation zone by the direct injection system of the unit

Method used

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  • Prediction method of oil film thickness on upper and lower surfaces of strip steel in rolling deformation zone of secondary cold rolling mill
  • Prediction method of oil film thickness on upper and lower surfaces of strip steel in rolling deformation zone of secondary cold rolling mill
  • Prediction method of oil film thickness on upper and lower surfaces of strip steel in rolling deformation zone of secondary cold rolling mill

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Embodiment 1

[0031] Taking a secondary cold rolling unit as an example, according to figure 1 The total calculation flow chart of the method for predicting the oil film thickness on the upper and lower surfaces of the strip steel in the rolling deformation zone of the secondary cold rolling mill is as follows:

[0032] First, in step (A), the pre-set process parameters for strip rolling lubrication of a certain DR8 steel grade to be produced by the secondary cold rolling unit are collected, including: emulsion flow density q=11.0L / min / m, emulsion flow density q=11.0L / min / m, emulsion Flow concentration C=4.9%, emulsion precipitation distance L=0.5m, rolling mill entrance rolling speed V 0 =751m / min, work roll speed V R =886m / min, rolling speed V at the exit of the rolling mill 1 =940m / min, rolling bite angle α=0.011rad, entrance deformation resistance K 0 =300MPa, back tension σ 0 =102MPa, rolling oil initial dynamic viscosity η 0 =0.02Pa·s, rolling oil pressure viscosity coefficient θ...

Embodiment 2

[0052] Taking a certain secondary cold-rolling unit as an example, at first, in step (A), the pre-set process parameters for strip rolling lubrication of a certain DR9 steel grade to be produced by the secondary cold-rolling unit are collected, including: emulsion flow density q =10.8L / min / m, emulsion flow concentration C=10.2%, emulsion precipitation distance L=0.5m, rolling mill entrance rolling speed V 0 =488m / min, work roll speed V R =684m / min, rolling speed V at the exit of the rolling mill 1 =729m / min, rolling bite angle α=0.016rad, entrance deformation resistance K 0 =300MPa, back tension σ 0 =98MPa, rolling oil initial dynamic viscosity η 0 =0.02Pa·s, rolling oil pressure viscosity coefficient θ=0.01MPa -1 , Impact coefficient of precipitation rate λ z =0.20, precipitation rate wettability influence coefficient λ r =0.70, precipitation rate time influence coefficient λ t =120.0, influence coefficient δ of residual rate flow on strip upper surface qs =10.0, time...

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Abstract

The invention relates to a method for forecasting the thickness of oil films on upper and lower surfaces of strip steel in a rolling deformation zone of a secondary cold rolling unit. The method mainly comprises the steps that (1) rolling and lubricating presetting technological parameters of the to-be-produced strip steel are collected; (2) thickness iterative values of the oil films attached tothe upper and lower working roller surfaces of an outlet of the rolling deformation zone are initialized; (3) the thickness of the oil films separated from the upper and lower surfaces of the strip steel in a front rolling zone is calculated; (4) the thickness of the oil films attached to the upper and lower working roller surfaces in the front rolling zone is calculated; (5) the thickness of theoil films on the upper and lower surfaces of the strip steel at an inlet of the front rolling zone is calculated; (6) the thickness of the oil films on the upper and lower surfaces of the strip steelat the inlet of the rolling deformation zone is calculated; (7) the thickness of the oil films on the upper and lower surfaces of the strip steel at the outlet of the rolling deformation zone is calculated; (8) the thickness of the oil films attached to the upper and lower working roller surfaces of the outlet of the rolling deformation zone is calculated; and (9) a forecasting result for the thickness of the oil films on the upper and lower surfaces of the strip steel at the inlet of the rolling deformation zone is output. By means of the method, the corresponding thickness of the oil films on the upper and lower surfaces of the strip steel in the rolling deformation zone of the secondary cold rolling unit is forecasted, and the lubricating property of the rolling process of the secondarycold rolling unit is controlled and improved.

Description

technical field [0001] The invention belongs to the technical field of cold rolling, and in particular relates to a method for predicting the thickness of an oil film on the upper and lower surfaces of strip steel in a rolling deformation zone of a secondary cold rolling mill. Background technique [0002] In recent years, with the continuous expansion of the packaging and canning industry market, the tin-plated and chrome-plated strip industry has developed rapidly. Secondary cold rolling refers to the reduction and thinning of the primary cold-rolled strip after annealing. Compared with traditional primary cold-rolled products, secondary cold-rolled products have the advantages of thinner thickness, higher strength, and better processing performance, which can effectively save steel material consumption and reduce environmental pollution, thus better adapting to packaging and canning The development trend of the industry. Due to the thin thickness and high strength of th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B38/00B21B37/44B21B1/22G06F7/533
CPCB21B1/22B21B37/44B21B38/00B21B2001/221G06F7/533
Inventor 白振华钱承崔亚亚刘亚星崔熙颖
Owner 唐山格诺金属科技有限公司