Rolling schedule comprehensive optimization method for cold continuous rolling unit taking scratch prevention as objective
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A technology of cold tandem rolling mills and rolling schedules, which is applied in metal rolling, metal rolling, manufacturing tools, etc., and can solve the problems of inaccurate prediction of comprehensive judgment indicators
Inactive Publication Date: 2014-02-19
山东冠洲股份有限公司
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[0004] In view of the inaccurate prediction of the comprehensive judgment index of napping on site, the purpose of the present invention is to provide a cold tandem rolling unit that can accurately predict
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Embodiment 1
[0048] A method for comprehensive optimization of rolling schedules with the goal of preventing and controlling roughening in a tandem cold rolling mill. The steps are as follows: figure 1 Shown:
[0049] First, in step 1, the main equipment parameters of the five-stand cold tandem rolling mill are collected, mainly including: 1-5# stand work roll diameter D wi ={538.1,474.8,495.1,527.2,528.5}mm, 1-5# rack support roller diameter D bi ={1218, 1228.2, 1325.4, 1235, 1304.9} mm, 1-5# frame work roll roll distribution ΔD wij =0 (j is the number of strip elements), 1-5# frame support roller roll profile distribution ΔD bij =0, 1-5# frame work roll body length L wi =1220mm, 1-5# frame support roller body length L bi =1092mm, 1-5# frame work roll bending cylinder center distance l wi =2100mm, 1-5# frame support roller press down screw center distance l bi =2100mm;
[0050] Subsequently, in step 2, the process characteristic parameters of the five-stand cold tandem rolling unit...
Embodiment 2
[0068] First, in step 1, the main equipment parameters of the five-stand cold tandem rolling mill are collected, mainly including: 1-5# stand work roll diameter D wi ={525.7,482.3,493.4,526.1,522.3}mm, 1-5# rack support roller diameter D bi ={1275.4, 1229.9, 1226.9, 1297, 1214} mm, 1-5# frame work roll distribution ΔD wij =0 (j is the number of strip elements), 1-5# frame support roller roll profile distribution ΔD bij =0, 1-5# frame work roll body length L wi =1220mm, 1-5# frame support roller body length L bi =1092mm, 1-5# frame work roll bending cylinder center distance l wi =2100mm, 1-5# frame support roller press down screw center distance l bi =2100mm;
[0069] Subsequently, in step 2, the process characteristic parameters of the five-stand cold tandem rolling unit are collected, mainly including: the allowable maximum rolling pressure P of 1-5# stands maxi =2000t, 1-5# stand allowable maximum rolling power F maxi =5000kw, 1-5# frame work roll maximum positive ben...
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Abstract
A rolling schedule comprehensive optimization method for a cold continuous rolling unit taking scratch prevention as an objective mainly comprises the following steps that 1, main equipment and technological parameters of the cold continuous rolling unit with five machine frames are collected; 2 procedure parameters involved in a rolling schedule optimization procedure are defined; 3, the ability of the unit to regulate the outlet plate shapes is improved; 4, initial values of reduction rates epsilon<i0> of the first machine frame, the second machine frame, the third machine frame and the fourth machine frame and initial values of outlet tension force T<i0> of the first machine frame, the second machine frame, the third machine frame and the fourth machine frame are given; 5, an initial value of the reduction rate of the fifth machine frame is calculated; 6, rolling pressure, rolling power, slipping factors, and the outlet plate shape value of each machine frame are calculated; 7, the value of a scratch comprehensive judgment index lambada of each machine frame is calculated; 8, an optimized objective function is calculated; 9 the optimal rolling schedule is output; the steps are executed through a computer. By means of the rolling schedule comprehensive optimization method, the scratch comprehensive judgment index of each machine frame can be predicted accurately, the occurrence possibility of scratch defects is reduced to the greatest extent, production efficiency is increased, and outlet surface quality of strip steel is improved.
Description
technical field [0001] The invention relates to the field of cold rolling, in particular to a rolling schedule comprehensive optimization method for a continuous cold rolling mill with the goal of preventing and controlling roughening. Background technique [0002] In recent years, due to the huge demand of household appliances, automobiles, electronics, aerospace and other industries, the production of strips has developed rapidly. At the same time, as most strip users shift from low-end to high-end, higher and higher requirements are placed on the surface quality of strip steel. In the process of continuous cold rolling, it is easy to generate roughness on the surface of the roll, and it is continuously copied on the surface of the strip. The roughness defect on the surface of the strip has a great impact on the surface quality of the product. A bright white line on the surface that appears continuously along the entire length of the roll. Pulling defects are sometimes a...
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