Method for forecasting abrasion loss of six-rack ultra-high strength steel cold rolling working roll

Abstract

The invention discloses a method for forecasting the abrasion loss of a six-rack ultra-high strength steel cold rolling working roll. The method comprises the steps that rolling data of six racks are collected; the sliding abrasion loss and the rolling abrasion loss between the working rollers of the racks and the strip steel and between the working rollers of the racks and the middle rollers are calculated; correcting by comprehensively considering the influence of the temperature on the hardness of the roller; and outputting the abrasion loss of each rack. According to the invention, the wear condition of the working roll of each rack can be visually presented, the roll body needing to be replaced can be accurately positioned, the consumption cost is effectively reduced, reliable data support is provided for field staff, the stability and the high efficiency of the cold rolling process are ensured, the product quality problem caused by wear is avoided, the rejection rate is reduced, and the overall production efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of cold rolling technology, and in particular to a method for predicting the wear of work rolls in a six-stand ultra-high strength steel cold rolling mill. Background Technology

[0002] Cold rolling is a crucial process in producing high-precision, high-quality steel. The wear of the work rolls directly affects the dimensional accuracy and surface quality of the rolled products. During cold rolling, process parameters such as rolling force and rolling speed are closely related to work roll wear. Accurate wear prediction can help adjust rolling process parameters in advance, avoiding quality problems such as thickness deviations, scratches, and indentations caused by work roll wear, thus improving the stability and efficiency of the rolling process. This ensures that products meet quality standards, reduces scrap rates, and lowers production costs. Furthermore, work rolls are critical components of cold rolling mills and have high costs. Accurate wear prediction helps to rationally plan the use and replacement of work rolls, avoiding resource waste or equipment failure caused by replacing them too early or too late. With precise wear prediction, work rolls can be replaced in a timely manner when they reach their optimal service life, maximizing their value and reducing wear costs. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a method for predicting the wear of work rolls in a six-stand ultra-high strength steel cold rolling mill.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A method for predicting the wear of work rolls in a six-stand ultra-high strength steel cold rolling mill, the method comprising the following steps: Step 1) Collect data from the six stands during the actual rolling process, including: working time. Rolling pressure of each stand Hardness of working rolls on each frame Radius of working rollers on each frame , radius of intermediate rollers in each frame and the length of the working rollers of each frame .

[0005] Step 2) Calculation formula for the sliding wear between the i-th frame work roll and the strip. : , in, Width coefficient The width of the i-th stand before rolling. The thickness before rolling of the i-th stand. The thickness after rolling on the i-th stand. The lateral sliding amount between the strip and the work roll after rolling on the i-th stand. The longitudinal sliding amount between the strip and the work roll after rolling on the i-th stand. Let be the linear speed of the working roller in the i-th frame. Let be the strip exit speed of the i-th frame. Let i be the reduction amount of the i-th frame. The sliding wear coefficient of the working roll of the i-th frame.

[0006] Step 3) Calculate the sliding wear between the work roll and the intermediate roll of the i-th frame. : , in, Let be the amount of sliding between the work roll and the intermediate roll of the i-th frame. The linear velocity of the intermediate roller in the i-th frame.

[0007] Step 4) Calculate the rolling wear between the i-th frame work roll and the strip using the formula. : , in, Elastic modulus of the working roll of the i-th frame Poisson's ratio of the working roll of the i-th frame.

[0008] Step 5) Calculate the rolling wear between the work roll and the intermediate roll of the i-th frame. : .

[0009] Step 6) Calculate the wear of the work rolls after the working time t of the i-th frame. : .

[0010] Step 7) Considering the effect of temperature on roll hardness during rolling, the wear of the work rolls on the stand is corrected. , in, This refers to the working roll temperature.

[0011] Step 8) Output the wear amount of each rack. .

[0012] The beneficial effects of this invention are: it can accurately determine the wear of each stand's work roll, visually present the wear condition of each stand's work roll, accurately locate the rolls that need to be replaced, effectively reduce consumption costs, provide reliable data support for on-site personnel, ensure the stability and efficiency of the cold rolling process, avoid product quality problems caused by wear, reduce scrap rate, and improve overall production efficiency. Attached Figure Description

[0013] Figure 1 This is a flowchart of a method for predicting the wear of work rolls in a six-stand ultra-high strength steel cold rolling mill, according to the present invention. Detailed Implementation

[0014] The present invention will be further described in detail below with reference to embodiments, such as... Figure 1 As shown, taking the production performance of a cold rolling production line as an example, the application of this method in the field is explained in detail. Example 1

[0015] The implementation steps are as follows: (1) Data from the six stands during the actual rolling process was collected, including: working time. =100h, Width / Narrowness Coefficient Take 0.1, rolling pressure of each stand N, hardness of the working rollers of each frame HV, radius of the working rolls in each frame mm, radius of intermediate rollers in each frame Length of working rollers on each frame =1750mm, thickness before rolling of the i-th stand mm, thickness after rolling on the i-th stand mm, width before rolling of the first stand mm, strip exit speed of the i-th frame m / min, linear speed of the working roller of the i-th frame m / min, the linear velocity of the intermediate roller of the i-th frame m / min.

[0016] (2) Formula for calculating the sliding wear between the i-th frame work roll and the strip ,in The lateral sliding amount between the strip and the work roll after rolling on the i-th stand. The longitudinal sliding amount between the strip and the work roll after rolling on the i-th stand. Let be the pressing amount of the i-th frame, and be the sliding wear coefficient of the work roll of the i-th frame. : , Calculated: .

[0017] (3) Formula for calculating the sliding wear between the working roll and the intermediate roll of the i-th frame ,in The sliding amount between the work roll and the intermediate roll of the i-th frame: , Calculated: .

[0018] (4) Formula for calculating the rolling wear between the i-th frame work roll and the strip The elastic modulus of the i-th frame work roll GPa, Poisson's ratio of the working roll of the i-th frame : , Calculated: .

[0019] (5) Formula for calculating the rolling wear between the working roll and the intermediate roll of the i-th frame : , Calculated: .

[0020] (6) Calculate the wear of the work rolls after working t on the i-th frame respectively. ; , Calculated: .

[0021] (7) Considering the influence of temperature on roll hardness during rolling, the wear of the work rolls on the stand is corrected, wherein the work roll temperature is... =250℃: , Calculated: . Example 2

[0022] The implementation steps are as follows: (1) Data from the six stands during the actual rolling process was collected, including: working time. =100h, Width / Narrowness Coefficient Take 0.1, rolling pressure of each stand N, hardness of the working rollers of each frame HV, radius of the working rolls in each frame mm, radius of intermediate rollers in each frame Length of working rollers on each frame =1750mm, thickness before rolling of the i-th stand mm, thickness after rolling on the i-th stand mm, width before rolling of the first stand mm, strip exit speed of the i-th frame m / min, linear speed of the working roller of the i-th frame m / min, the linear velocity of the intermediate roller of the i-th frame m / min.

[0023] (2) Formula for calculating the sliding wear between the i-th frame work roll and the strip ,in The lateral sliding amount between the strip and the work roll after rolling on the i-th stand. The longitudinal sliding amount between the strip and the work roll after rolling on the i-th stand. Let be the pressing amount of the i-th frame, and be the sliding wear coefficient of the work roll of the i-th frame. : .

[0024] Calculated: .

[0025] (3) Formula for calculating the sliding wear between the working roll and the intermediate roll of the i-th frame ,in The sliding amount between the work roll and the intermediate roll of the i-th frame: , Calculated: .

[0026] (4) Formula for calculating the rolling wear between the i-th frame work roll and the strip The elastic modulus of the i-th frame work roll GPa, Poisson's ratio of the working roll of the i-th frame : , Calculated: .

[0027] (5) Formula for calculating the rolling wear between the working roll and the intermediate roll of the i-th frame : , Calculated: .

[0028] (6) Calculate the wear of the work rolls after working t on the i-th frame respectively. ; , Calculated: .

[0029] (7) Considering the influence of temperature on roll hardness during rolling, the wear of the work rolls on the stand is corrected, wherein the work roll temperature is... =250℃: , Calculated: .

[0030] The above content is only used to illustrate the technical solution of the present invention. Simple modifications or equivalent substitutions made by those skilled in the art to the technical solution of the present invention do not depart from the essence and scope of the technical solution of the present invention.

Claims

1. A method for predicting the wear of work rolls in a six-stand ultra-high strength steel cold rolling mill, characterized in that: The method includes the following steps: Step 1) Collect data from the six stands during the actual rolling process, including: working time. Rolling pressure of each stand Hardness of working rolls on each frame Radius of working rollers on each frame , radius of intermediate rollers in each frame and the length of the working rollers of each frame ; Step 2) Calculation formula for the sliding wear between the i-th frame work roll and the strip. : ， in, Width coefficient The width of the i-th stand before rolling. The thickness before rolling of the i-th stand. The thickness after rolling on the i-th stand. The lateral sliding amount between the strip and the work roll after rolling on the i-th stand. The longitudinal sliding amount between the strip and the work roll after rolling on the i-th stand. Let be the linear speed of the working roller in the i-th frame. Let be the strip exit speed of the i-th frame. Let i be the reduction amount of the i-th frame. The sliding wear coefficient of the i-th frame work roll; Step 3) Calculate the sliding wear between the work roll and the intermediate roll of the i-th frame. : ， in, Let be the amount of sliding between the work roll and the intermediate roll of the i-th frame. The linear velocity of the intermediate roller in the i-th frame; Step 4) Calculate the rolling wear between the i-th frame work roll and the strip using the formula. ; ， in, Elastic modulus of the working roll of the i-th frame Poisson's ratio of the working roll of the i-th frame; Step 5) Calculate the rolling wear between the work roll and the intermediate roll of the i-th frame. : ， Step 6) Calculate the wear of the work rolls after the working time t of the i-th frame. : ； Step 7) Considering the effect of temperature on roll hardness during rolling, the wear of the work rolls on the stand is corrected. ， in, The working roll temperature; Step 8) Output the wear amount of each rack. .

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