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Optimizing method of contact pressure between water cutting rubber and work roll in secondary cold rolling mill

A secondary cold rolling, contact pressure technology, applied in tension/pressure control, manufacturing tools, metal rolling, etc., can solve the problem of less research on the influence of oil film thickness, and achieve the improvement of lubricating performance and product surface quality, lubricating oil film Equal thickness, optimized contact pressure effect

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

In the past, scholars at home and abroad focused on the research on the lubrication performance of the emulsion in the rolling process of the secondary cold rolling mill, focusing on the emulsion flow rate, emulsion concentration, and emulsion precipitation distance. There are few studies on the influence of surface adhesion oil film thickness, oil film thickness in rolling deformation area, lubricating performance and product surface quality

Method used

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  • Optimizing method of contact pressure between water cutting rubber and work roll in secondary cold rolling mill
  • Optimizing method of contact pressure between water cutting rubber and work roll in secondary cold rolling mill
  • Optimizing method of contact pressure between water cutting rubber and work roll in secondary cold rolling mill

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Experimental program
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Effect test

Embodiment 1

[0037] Taking a secondary cold rolling unit as an example, according to figure 1 The total calculation flow chart shown:

[0038] First, in step (A), the main equipment and rolling process parameters of the secondary cold rolling unit are collected, including: emulsion flow density q=10.5L / min / m, emulsion flow concentration C=5.8%, emulsion flow density Precipitation distance L=0.5m, rolling speed V at the entrance of the rolling mill 0 =706m / min, work roll speed V R =817m / min, rolling speed V at the exit of the rolling mill 1=882m / min, rolling bite angle α=0.013rad, entrance deformation resistance K 0 =320MPa, back tension σ 0 =95MPa, rolling oil initial dynamic viscosity η 0 =0.025Pa·s, rolling oil pressure viscosity coefficient θ=0.012MPa -1 , Impact coefficient of precipitation rate λ z =0.236, precipitation rate wettability influence coefficient λ r =0.675, precipitation rate time influence coefficient λ t =132.5, influence coefficient δ qs =10.62, the time infl...

Embodiment 2

[0063] Taking a certain secondary cold-rolling unit as an example, at first, in step (A), collect the main equipment and rolling process parameters of the secondary cold-rolling unit, including: emulsion flow density q=14.2L / min / m, emulsification Liquid flow concentration C = 6.6%, emulsion precipitation distance L = 0.5m, rolling mill entrance rolling speed V 0 =555m / min, work roll speed V R =778m / min, rolling speed V at the exit of the rolling mill 1 =836m / min, rolling bite angle α=0.015rad, entrance deformation resistance K 0 =285MPa, back tension σ 0 =101MPa, rolling oil initial dynamic viscosity η 0 =0.025Pa·s, rolling oil pressure viscosity coefficient θ=0.012MPa -1 , Impact coefficient of precipitation rate λ z =0.236, precipitation rate wettability influence coefficient λ r =0.675, precipitation rate time influence coefficient λ t =132.5, influence coefficient δ qs =10.62, the time influence coefficient δ of the remaining rate of the strip upper surface ts =33...

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Abstract

Disclosed is an optimizing method of contact pressure for a double cold reduction water shearing rubber and working rollers. The optimizing method of contact pressure for the double cold-rolling watershearing rubber and the working rollers comprises the following steps that 1, main device and rolling technological parameters of a double cold reduction mill are collected; 2, the oil film thicknessof the upper surface of the strip steel at the before-rolling area entrance and the thickness of an oil film adhering to the surface of the upper working roller at the rolling deformation-area outletare calculated; 3, the thickness of an oil film separated out of the lower surface of the strip steel at a before-rolling area is calculated; 4, the required thickness of an oil film adhering to thesurface of the lower working roller at the before-rolling area for enabling the lubricating oil film thicknesses of the upper and lower surfaces of the strip steel to be equal is calculated; 5, the optimal contact pressure of lower water shearing rubber and the lower working roller corresponding to the equal lubricating oil film thickness of the upper and lower surfaces of the strip steel during the rolling process is calculated; and 6, the optimal contact pressure of the lower water shearing rubber and the lower working roller is output. According to the optimizing method of contact pressurefor the double cold reduction mill water shearing rubber and the working rollers, the contact pressure of the upper and lower water shearing rubber and the working rollers can be optimized and determined, the equal lubricating oil film thickness of the upper and lower surfaces of the strip steel during the double cold reduction mill rolling process is achieved, so that the lubricating property ofthe double cold reduction mill and surface quality of products are enhanced.

Description

technical field [0001] The invention belongs to the technical field of cold rolling, and in particular relates to a method for optimizing the contact pressure between a water cutting rubber and a work roll of a secondary cold rolling mill. Background technique [0002] Secondary cold rolling refers to the reduction and thinning of the primary cold-rolled steel strip after annealing. Compared with the traditional primary cold rolling, the secondary cold-rolled product has thinner thickness and higher strength. Therefore, the emulsion direct injection system is adopted. Perform rolling lubrication. During the secondary cold rolling process, the nozzle on the emulsion spray rack sprays the emulsion directly on the strip surface at a certain distance from the roll gap, forming an oil film with a certain thickness on the strip surface to lubricate the rolling deformation area, The cooling water spraying device arranged on the exit side of the rolling mill sprays cooling water to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B38/00B21B37/48B21B37/44B21B1/22G06F7/533
CPCB21B1/22B21B37/44B21B37/48B21B38/00B21B2001/221G06F7/533
Inventor 白振华董航喆崔亚亚李小峰王葛
Owner 唐山格诺金属科技有限公司
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