Process lubrication optimization method aiming at stable rolling under large deformation of DCR unit

A technology of process lubrication and optimization method, which is applied in the direction of workpiece lubrication device, design optimization/simulation, roll, etc., can solve the problem of high front slip and rolling pressure, reduce the incidence of strip instability, and affect the rolling of the unit Stability and other issues, to achieve the effect of improving stability and uniform cooling capacity of emulsion

Active Publication Date: 2018-10-30
YANSHAN UNIV
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Problems solved by technology

When the secondary cold rolling unit produces strips with large deformation, the front slip value and rolling pressure are large, which seriously affects the rolling stability of the unit
[0003] In the field of cold rolling, there is no relevant literature on the optimization of process lubrication parameters to reduce the incidence of strip instability on the premise of ensuring that the strip forward slippage and rolling pressure are within the allowable range of the tandem cold rolling mill

Method used

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  • Process lubrication optimization method aiming at stable rolling under large deformation of DCR unit

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Experimental program
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Effect test

Embodiment 1

[0032] (a) Collect the main equipment and process parameters of the secondary cold rolling unit, mainly including the following steps:

[0033] a1) Collect the roll process parameters of the cold rolling mill, mainly including: work roll diameter D=435mm; original surface roughness Ra r0 =0.52μm, the modulus of elasticity E=210GPa of the work roll, the Poisson's ratio v=0.27 of the work roll;

[0034] a2) Collect the relevant rolling process parameters of the secondary cold rolling unit, mainly including: the average deformation resistance K of the strip M =475MPa and yield strength σ s =500MPa, strip width B=908mm, incoming material thickness h 0 = 0.276mm, reduction rate ε = 46.8%, normal rolling speed V = 230m / min, rolling pressure setting value P = 401t, front tension T 1 =250MPa, back tension T 0 =300MPa, unit front tension σ 1 =21.1MPa, unit back tension σ 0 =12.7MPa;

[0035] a3) Collect process lubrication system parameters, mainly including dynamic viscosity of...

Embodiment 2

[0053] (a) Collect the main equipment and process parameters of the secondary cold rolling unit, mainly including the following steps:

[0054] a1) Collect the roll process parameters of the cold rolling mill, mainly including: work roll diameter D=435mm; original surface roughness Ra r0 = 0.52 μm, the elastic modulus E of the work roll = 210GPa, the Poisson’s ratio of the work roll v = 0.27; a2) Collect the relevant rolling process parameters of the secondary cold rolling unit, mainly including: the average deformation resistance K of the strip m =475MPa and yield strength σ s =500MPa, strip width B=908mm, incoming material thickness h 0 = 0.276mm, reduction rate ε = 47.5%, normal rolling speed V = 230m / min, rolling pressure setting value P = 4650KN, front tension T 1 =200MPa, back tension T 0 =250MPa, unit front tension σ 1 =20.3MPa, unit back tension σ 0 =12.7MPa;

[0055] a3) Collect process lubrication system parameters, mainly including dynamic viscosity of emulsio...

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Abstract

Disclosed is a process lubrication optimization method aiming at stable rolling under large deformation of a DCR unit. The method mainly includes the following steps executed by a computer: (1) collecting main equipment and process parameters of a secondary cold rolling mill unit; (2) defining the parameters and intermediate process parameters; (3) initializing k<c>' to 0; (4) calculating emulsionconcentration c; (5) initializing k<w> to 0; (6) calculating an emulsion flow rate w; (7) initializing k<t> to 0; (8) calculating an initial temperature t<0>; (9) calculating a friction coefficient mu; (10) calculating rolling pressure P and a forward slip value S; (11) calculating a function G<3>(Z); (12) determining whether inequalities are true; and (13) outputting optimum emulsion concentration c<y>, an optimum flow rate w<y> and an optimum temperature t<0y>. On the premise of stable rolling, the secondary cold rolling mill unit outputs the optimum emulsion concentration c<y>, the optimumflow rate w<y> and the optimum temperature t<0y>. Therefore, the cooling capability of an emulsion is fully developed, and the cooling capacity of the emulsion in each rack is more uniform, which improves the stability of production.

Description

technical field [0001] The invention relates to the technical field of cold rolling, in particular to a process lubrication parameter optimization method in the secondary continuous cold rolling process. Background technique [0002] In the secondary cold rolling production process, in order to reduce the surface temperature of the roll and the strip, reduce the friction factor and friction force on the surface of the contact arc in the deformation zone, prevent the metal from sticking to the roll surface and reduce the wear of the roll, it is necessary to provide the roll and the strip Spray emulsion on the surface of the material for process lubrication. The quality of process lubrication will directly affect the stability of rolling and the quality of products. When the secondary cold rolling unit produces strips with large deformation, the front slip value and rolling pressure are relatively large, which seriously affects the rolling stability of the unit. [0003] In ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B27/10B21B45/02G06F17/50
CPCB21B27/10B21B45/0203B21B45/0239B21B2027/103G06F30/20
Inventor 白振华刘超智王亮忠张立更崔熙颖
Owner YANSHAN UNIV
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