Control method of tandem cold rolling mill emulsion section cooling

A technology of segmented cooling and control method, applied in the direction of profile control, etc., can solve the problem of inability to guarantee the surface quality of the finished strip steel of the rolling mill, and achieve the effect of fast calculation speed, clear principle and reduced slippage

Active Publication Date: 2010-03-31
BAOSHAN IRON & STEEL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the cold tandem mills in the prior art do not have a corresponding segmental control model for the segmented emulsion injection beams in the frame, and rely on manual experience to set the emulsion flow rate. Although a small number of units have a certain amount of emulsi

Method used

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  • Control method of tandem cold rolling mill emulsion section cooling
  • Control method of tandem cold rolling mill emulsion section cooling
  • Control method of tandem cold rolling mill emulsion section cooling

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0150] Now take the typical steel grade with tapping mark AP0740 as an example, with the help of Figure 4 To describe the emulsion staged cooling control process and related effects of a specific steel grade on a specific cold tandem mill.

[0151] First of all, in the initial stage, firstly, key parameters such as the equipment parameters of the rolling mill and the specifications of the strip to be rolled are collected, mainly including the length L of the work roll body W =2230mm, working roll diameter D W =560mm, back-up roll body length L b =2030mm, back-up roll diameter D b =1500mm, the distance between the drive side of the backup roller and the center of the screw on the working side is l 1 =2360mm, positive and negative bending rolls of working rolls, center distance between drive side and working side bending roll hydraulic cylinder l 2 =2360mm, maximum bending force S=50t, maximum rolling pressure P=3000t, maximum rolling speed V=1200m / min, working original rol...

Embodiment 2

[0172] In order to further set forth the basic idea of ​​the present invention, take the typical steel grade of AP1057 as an example again with the tapping mark, by means of Figure 4 To describe the emulsion staged cooling control process and related effects of a specific steel grade on a specific cold tandem mill.

[0173] First of all, in the initial stage, firstly, key parameters such as the equipment parameters of the rolling mill and the specifications of the strip to be rolled are collected, mainly including the length L of the work roll body W =2230mm, working roll diameter D W =560mm, back-up roll body length L b =2030mm, back-up roll diameter D b =1500mm, the distance between the drive side of the backup roller and the center of the screw on the working side is l 1 =2360mm, positive and negative bending rolls of working rolls, center distance between drive side and working side bending roll hydraulic cylinder l 2 =2360mm, maximum bending force S=50t, maximum roll...

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Abstract

The invention discloses a control method of tandem cold rolling mill emulsion section cooling, comprising the following steps: a. collecting the device parameter of a rolling mill and the key parameter of band steel to be rolled; b. collecting a technological lubrication institution parameter; c. giving emulsion section cooling flow distribution initial value and iteration precision; d. calculating corresponding work roll thermal crown; e. calculating the lateral distribution value of a slipping factor; f. comparing the slipping factor maximum value with a critical value; g. calculating the lateral distribution value of a slip injury index; h. comparing the maximum value of the slip injury index with the critical value; i. calculating the corresponding strip shape distribution value; j. calculating the function value of a strip shape objective function; and k. judging whether Powell condition is available, and obtaining the control curve of the optimal section cooling flow. The controlmethod of the invention combines device section condition with practical flow control precision to set the emulsion flow in sections, reduces problems of slipping, hot slip injury and the like causedby lubrication and ensures the strip shape and the surface quality index of chassis outlet strip steel rolled stock.

Description

technical field [0001] The invention relates to a production technology of continuous cold rolling, in particular to a method for controlling the staged cooling of emulsion in a continuous cold rolling mill. Background technique [0002] figure 1 It is a schematic diagram of the continuous rolling process of cold strip steel, such as figure 1 As shown, the strip 1 is uncoiled from the uncoiler 2 and then sent to the frame. After being rolled by multiple stands, the strip 1 reaches a specified thickness and is sent to the coiler 3 for rewinding. The rolls of each stand include backup rolls 4 and work rolls 5 , wherein the work rolls 5 are in direct contact with the surface of the strip 1 . In the process of continuous cold rolling production, due to the deformation heat and friction heat generated by the deformation of the metal and the friction between the metal and the roll, the temperature of the roll surface gradually rises, forming a certain roll crown, producing a cer...

Claims

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Application Information

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IPC IPC(8): B21B37/32B21B37/44
Inventor 王骏飞
Owner BAOSHAN IRON & STEEL CO LTD
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