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Method for optimizing and setting spraying angle of emulsion nozzle of secondary cold rolling unit

A spray angle and secondary cold rolling technology, which is applied in metal rolling, metal rolling, metal processing equipment, etc., can solve the problems of uneven distribution of lateral lubrication performance, affecting plate shape and surface quality, etc., and achieve reduction of strips Effects of spot defects, improvement of shape quality, and improvement of uniformity

Inactive Publication Date: 2018-05-01
唐山格诺金属科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this way, the flow rate of the emulsion sprayed on the surface of the strip has certain non-uniform characteristics, which leads to the uneven distribution of the transverse lubrication performance of the strip in the rolling gap, and then affects the shape and surface quality of the strip after rolling.

Method used

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  • Method for optimizing and setting spraying angle of emulsion nozzle of secondary cold rolling unit
  • Method for optimizing and setting spraying angle of emulsion nozzle of secondary cold rolling unit
  • Method for optimizing and setting spraying angle of emulsion nozzle of secondary cold rolling unit

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Experimental program
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Effect test

Embodiment 1

[0035] Taking a secondary cold rolling unit as an example, according to figure 1 The total calculation process of the optimal setting method of the injection angle of the emulsion nozzle of the secondary cold rolling mill as shown:

[0036] First, in step (A), the equipment process parameters required for the optimization of the injection angle of the emulsion nozzle of the secondary cold rolling mill are collected, including: the number of nozzles N=10, the distance between nozzles L=120mm, the height of nozzle injection H=200mm, the nozzle Spray direction angle α=57°, nozzle side tilt angle Nozzle injection flow Q=1.03L / min, maximum strip width B max =1050mm, the minimum nozzle spray angle θ min =50°, the maximum nozzle spray angle θ max = 100°.

[0037] Subsequently, in step (B), the optimal value F of the objective function for optimizing the injection angle of the emulsion nozzle is initialized y =1000, and given nozzle injection angle optimization step Δθ=0.1°.

...

Embodiment 2

[0058] Take a secondary cold rolling unit as an example:

[0059] First, in step (A), the equipment process parameters required for the optimization of the injection angle of the emulsion nozzle of the secondary cold rolling mill are collected, including: the number of nozzles N=10, the distance between nozzles L=120mm, the height of nozzle injection H=150mm, the nozzle Spray direction angle α=68°, nozzle side tilt angle Nozzle injection flow Q=0.80L / min, maximum strip width B max =1000mm, the minimum nozzle spray angle θ min =50°, the maximum nozzle spray angle θ max = 100°.

[0060] Subsequently, in step (B), the optimal value F of the objective function for optimizing the injection angle of the emulsion nozzle is initialized y =1000, and given nozzle injection angle optimization step Δθ=0.1°.

[0061] Subsequently, in step (C), the nozzle injection angle optimization process parameter i is defined, and i=0 is initialized.

[0062] Subsequently, in step (D), the nozzl...

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Abstract

The invention discloses a method for optimizing and setting the spraying angle of an emulsion nozzle of a secondary cold rolling unit. The method comprises the following steps of (A) collecting required equipment process parameters of optimizing the spraying angle of the emulsion nozzle of the secondary cold rolling unit; (B) initializing and optimizing the optimal value Fy of an objective function, and giving the optimized step size Delta Theta; (C) defining an optimization process parameter i, and initializing i to be equal to 0; (D) calculating the nozzle spraying angle Theta i; (E) calculating the emulsion flow density transverse distribution q1i (xj) of a single nozzle; (F) calculating the emulsion flow transverse distribution qNi (xj) of multiple nozzles; (G) calculating the emulsionflow transverse distribution qi (xj) in the strip steel width range in the secondary cold rolling process; (H) calculating the objective function F (Theta i) of the spraying angle optimization of theemulsion nozzle; (I) judging whether the F (Theta i) is smaller than Fy; (J) judging whether Theta i is smaller than or equal to Theta max; and (K) outputting the optimal value Theta y of the spraying angle of the emulsion nozzle of the secondary cold rolling unit. According to the method for optimizing and setting the spraying angle of the emulsion nozzle of the secondary cold rolling unit, thestrip steel plate shape quality of the secondary cold rolling unit can be improved, and the occurrence rate of emulsion strip-shaped patches on the surface of strip steel is reduced.

Description

technical field [0001] The invention belongs to the technical field of cold rolling, in particular to a method for optimally setting the injection angle of an emulsion nozzle of a secondary cold rolling mill. Background technique [0002] Secondary cold rolling is to further reduce the thickness of the strip steel after the first cold rolling and annealing, so as to increase the hardness and strength of the material. It can pass enough strength of the can body with a thinner thickness, effectively saving the consumption of steel materials, reducing the Cost, reduce environmental pollution, so as to better adapt to the development trend of the packaging and canning industry. Due to the thin thickness, high strength and high pass reduction rate of secondary cold-rolled products, and high requirements on plate shape and surface quality, the emulsion direct injection system is often used for rolling lubrication. The conventional secondary cold rolling direct injection system is...

Claims

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Application Information

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IPC IPC(8): B21B45/02
CPCB21B45/0251B21B45/0266
Inventor 白振华董航喆崔熙颖雷彤崔亚亚刘亚星
Owner 唐山格诺金属科技有限公司
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