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Emulsified liquid flow dynamic and comprehensive optimization setting method suitable for cold continuous rolling unit
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A technology for tandem cold rolling mills and optimized settings, applied in rolling mill control devices, mass flow control devices, metal rolling, etc., can solve problems such as inability to dynamically adjust and allocate fixed
Active Publication Date: 2017-01-11
唐山市榕泽钢铁加工有限公司
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[0004] Aiming at the problem that the flow distribution of the emulsion between the stands of the cold tandem rolling mill is fixed and cannot be adjusted dynamically with the change of the rolling speed, the present invention provides a method that can fully exert the cooling capacity of the emulsion of each stand and avoid the supply of the emulsion flow. Insufficient rolling pressure caused by abnormal increase and rolling pressure "upside down" and other problems, improving the production stability of the unit, suitable for the dynamic comprehensive optimization setting method of the emulsion flow rate of the cold tandem rolling unit
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[0053] A dynamic comprehensive optimization setting method of emulsion flow rate suitable for cold tandem mills. The calculation process is as follows figure 1 Shown:
[0054] First, in step (a), the parameters are collected:
[0055] (a1) Collecting strip parameters, mainly including strip width b=850mm, strip thickness H in and out of each rack i ={2.1,1.17,0.65,0.40,0.27}(mm), h i ={1.17,0.65,0.40,0.27,0.22}(mm), the typical inlet and outlet speeds of strips in each rack (m / s)
[0102] First, in step (a), the parameters are collected:
[0103] (a1) Collecting strip parameters, mainly including strip width b=975mm, strip thickness H in and out of each rack i ={2.1,1.17,0.65,0.40,0.27}(mm), h i ={1.17,0.65,0.40,0.27,0.22}(mm), the typical inlet and outlet speeds of strips in each rack (m / s)
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Abstract
The invention relates to an emulsified liquid flow dynamic and comprehensive optimization setting method suitable for a cold continuous rolling unit. The method mainly comprises the following steps that (1) parameters are collected; (2) initial values, optimizing step sizes and middle process parameters are set; (3) the flow and the optimizing step sizes of emulsified liquid of a No.2 rack, a No.3 rack, a No.4 rack and a No.5 rack are defined; (4) cooling capacity coefficients of the emulsified liquid of the racks are calculated; (5) the theoretical optimal flow of the racks at the steady rolling speed is calculated; (6) the total flow of the emulsified liquid of the racks is calculated; (7) an emulsified liquid flow dynamic and comprehensive optimization objective function is calculated; (8) the optimal flow of the emulsified liquid of the racks is output; and (9) distribution of the flow of the emulsified liquid of the racks at the new rolling speed is completed till distribution of all the flow is completed. According to the method, the problems that due to fixed distribution of the flow of the emulsified liquid between the racks, the rolling pressure is increased abnormally, and the rolling pressure is inverted are avoided; the cooling capacity of the emulsified liquid is given full play, and the cooling capacity of the emulsified liquid of the racks is more uniform; and the production stability is improved.
Description
Technical field [0001] The invention belongs to the technical field of cold rolling, and particularly relates to a method for setting an emulsion flow rate of a cold tandem rolling mill. Background technique [0002] In the cold tandem rolling production process, in order to reduce the surface temperature of the roll and the strip, reduce the friction coefficient and friction on the surface of the contact arc in the deformation zone, prevent the metal from sticking to the surface of the roll and reduce the wear of the roll, it is necessary to improve the roll and the strip. Emulsion sprayed on the surface. For the cold tandem mill at this stage, the emulsion flow between the stands is distributed according to the production experience according to the fixed flow rate under the premise that the total flow and the single stand flow do not exceed the maximum value. Taking into account that the strength, reduction ratio, front and rear tension of the strips of each stand of the cold...
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