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Calculation method for two-stand temper mill finished plate surface roughness characteristic parameters

A technology of surface roughness and roughness, which is applied in the field of calculation of surface roughness characteristic parameters of finished panels of double-rack leveling units, can solve the problems of not being proposed and the model not being able to be applied concretely.

Active Publication Date: 2018-12-21
YANSHAN UNIV
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Problems solved by technology

Many coefficients are involved in the process of establishing the prediction model of the surface roughness of the steel strip. The previous research on this aspect only stays at the theoretical stage, and a set of methods for calculating these coefficients has not been proposed, which makes the model unable to be applied concretely. For this reason, it is very important to invent a calculation method for the characteristic parameters of the finished board surface roughness of the double-frame skin pass unit.

Method used

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  • Calculation method for two-stand temper mill finished plate surface roughness characteristic parameters
  • Calculation method for two-stand temper mill finished plate surface roughness characteristic parameters
  • Calculation method for two-stand temper mill finished plate surface roughness characteristic parameters

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Experimental program
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Effect test

Embodiment 1

[0047] (1) Parameter collection, mainly including: surface roughness of finished strip steel

[0048] Ra' s,i ={0.544, 0.493; 0.523, 0.485; 0.516, 0.490; 0.595, 0.454; 0.446, 0.460; 0.476, 0.444; 1.538, 1.408; 1.486, 1.436; Ra s0,i ={0.864,0.544,0.818,0.818,0.552,0.552,0.568,0.568,0.478,0.478}μm, strip thickness h i ={0.18,0.17,0.17,0.18,0.18,0.18,0.354,0.354,0.199,0.21}mm, strip deformation resistance k i ={460,460,390,390,460,460,270,270,390,390}Mpa,

[0049] Total elongation ε i ={0.73,0.75,0.96,0.95,0.81,0.80,1.55,1.51,0.98,1.15}, 1# roll original surface roughness Ra r01,i ={1.63,1.63,1.63,1.63,1.63,1.63,1.64,1.64,1.63,1.63}μm, 1# rolling kilometers L 1,i ={651.64,710,750.81,870.65,810.23,862.56,13.093,26.326,14.439,24}km, 2# roll original surface roughness Ra r02,i ={0.42,0.42,0.42,0.42,0.42,0.42,2.97,2.97,0.70,0.70}μm, 2# rolling kilometers

[0050] L 2,i ={651.64,710,750.81,870.65,810.23,862.56,13.093,26.326,14.439,24}km, i=1,2,,,10;

[0051] (2) Set the init...

Embodiment 2

[0081] (1) Parameter collection, mainly including: surface roughness Ra' of finished strip steel s,i ={0.644, 0.646; 0.677, 0.687; 0.546, 0.574; 0.523, 0.485; 0.516, 0.490; 0.595, 0.454; 0.446, 0.460; 0.476, 0.444; Ra s0,i ={0.864,0.864,0.818,0.818,0.552,0.552,0.568,0.568,0.678,0.678}μm, strip thickness h i ={0.17,0.17,0.18,0.18,0.17,0.18,0.35,0.34,0.159,0.21}mm, strip deformation resistance k i ={460,460,390,390,460,460,270,270,390,390}Mpa, total elongation ε i ={0.63,0.77,0.86,0.92,0.83,0.80,1.15,1.21,0.78,0.95}, 1# roll original surface roughness Ra r01,i ={1.63,1.63,1.63,1.63,1.63,1.63,1.64,1.64,1.63,1.63}μm, 1# rolling kilometers L 1,i ={551.64,510,650,820.65,710.23,862.55,23.093,26.326,16.439,24}km, 2# roll original surface roughness Ra r02,i ={0.42,0.42,0.42,0.42,0.42,0.42,2.97,2.97,0.70,0.70}μm, 2# rolling kilometers L 2,i ={551.64,510,650,820.65,710.23,862.55,23.093,26.326,16.439,24}km,i=1,2,,,10;

[0082] (2) Set the initial value of the objective function F ...

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Abstract

The invention discloses a calculation method for two-stand temper mill finished plate surface roughness characteristic parameters. The calculation method comprises the following steps that (1) parameters are collected; (2) a target function initial value F0 is set; (3) lambda2 is set to be equal to lambda2', and lambda3 is set to be equal to lambda3'; (4) lambda1 is set to be equal to k1delta1; (5) the finished product strip steel surface roughness Ras,i under the current state is calculated; (6) a target function F(X) is calculated; (7) whether an inequality F<F0 is met or not is judged; (8)whether an inequality k1<1 / delta1 is met or not is judged; (9) a comprehensive imprinting rate influence coefficient adjustment factor optimization step size delta2 is defined; (10) lambda2 is set tobe equal to k2delta2; (11) the finished product strip steel surface roughness Ras,i under the current state is calculated; (12) the target function F(X) is calculated; (13) whether the inequality F<F0is met or not is judged; and (14) an inequality k2<1 / delta2 is met or not is judged; and other steps are carried out. According to the calculation method, on the basis of deeply researching the stripsteel surface roughness forming mechanism in temper rolling process, the calculation method for the two-stand temper mill finished plate surface roughness characteristic parameters is established, and the foundation is laid for the development of the strip steel surface roughness control technology.

Description

technical field [0001] The patent relates to the field of cold rolling, in particular to a method for calculating characteristic parameters of surface roughness of a finished plate of a double-stand skin pass unit. Background technique [0002] The production process of cold-rolled strip steel is generally: pickling-rolling-annealing-levelling-shearing-curling. Skin temper rolling is a key process in strip steel. The purpose is to eliminate the yield plateau existing in the steel plate after recrystallization annealing, improve flatness, eliminate discontinuous plastic deformation and obtain a uniform surface. The leveling process of the double-frame leveling unit mainly includes the following processes: coiling trolley—uncoiler—entrance S roller—machine front tension roller—leveling machine—machine rear tension roller—exit S roller—coiler—coil unloading trolley —Unloading / packing / steel coil storage. In the temper rolling of the strip steel, the surface roughness predicti...

Claims

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Application Information

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IPC IPC(8): B21B37/28
CPCB21B37/28
Inventor 白振华张立更王亮忠夏益伟
Owner YANSHAN UNIV
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