Optimization method of technological lubrication system taking galling prevention as objective for tandem cold mill
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A cold tandem rolling mill and process lubrication technology, applied in metal rolling, metal rolling, manufacturing tools, etc., can solve problems such as fluffing, flaking defects, and affecting the surface quality of strip steel.
Active Publication Date: 2014-03-05
唐山市榕泽钢材加工有限公司
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At the same time, for tandem cold rolling mills, the slipping tendency is obvious during high-speed rolling. When slipping occurs, the friction between the roll and the strip in the rolling zone completely changes to sliding friction, and the iron powder adsorbed on the surface of the roll Separation from the surface of the roll under the obstruction of sliding friction, the separated iron powder will quickly accumulate near the entrance of the roll gap, and continuously "scrape" the iron powder at the position behind it as the roll slips in the circumferential direction, and finally in the relatively Under the action of large ro
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Embodiment 1
[0051] A method for optimizing the process lubrication system of a cold tandem rolling mill with the goal of preventing and controlling fuzzing, the steps are as follows figure 1 Shown:
[0052] 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 ={537.8,476.4,474.7,528.6,514.5}mm, 1-5# rack support roller diameter D bi ={1267.3, 1228.2, 1294.4, 1243.3, 1303} 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;
[0053] Subsequently, in step 2, the process characteristic parameters of the five-stand cold tandem rolling unit are collecte...
Embodiment 2
[0073] 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 ={515.9,482.2,473.3,528.8,480.2}mm, 1-5# rack support roller diameter D bi ={1198.8, 1274.4, 1334.6, 1304.4, 1331.4} 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;
[0074] 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...
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Abstract
Disclosed is an optimization method of a technological lubrication system taking galling prevention as an objective for a tandem cold mill. The method mainly comprises the following computer-executed steps: 1, collecting main equipment and technological parameters of a five-stand tandem cold mill; 2, defining procedure parameters related in the technological lubrication system optimization procedure; 3, giving initial values of emulsion flow, emulsion concentration and emulsion temperature of a first stand, a second stand, a third stand, a fourth stand and a fifth stand; 4, computing a friction coefficient mui of each stand in a current technological lubrication system and rolling schedule; 5, computing rolling pressure, rolling power and slip factors of each stand; 6, computing thermal crown distribution of a working roll of each stand; 7, computing an outlet flatness value of the tail stand; 8, computing a value of a comprehensive galling judgment index lambdai of each stand; 9, computing an optimization objective function in the current technological lubrication system; 10, completing optimal setting of the technological lubrication system, taking the galling prevention as the objective, of the tandem cold mill. By the method, galling defection occurrence probability of each stand is lowered, 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 process lubrication system optimization method for a continuous cold rolling mill with the aim of preventing and controlling fuzzing. Background technique [0002] In the high-speed rolling process of the cold tandem mill, it is often necessary to spray a certain amount of emulsion into the roll gap to form a thin layer of lubricating oil film between the roll and the strip, so that there is only a part of the direct contact between the roll and the strip. Contact, the friction between the two will produce iron powder particles, and will enter the emulsion, when the emulsion with a high concentration of iron powder is sprayed on the roll and the entrance of the roll gap, part of the iron powder (especially combined with oil droplets) Saponified iron powder) will be adsorbed on the surface of the roll and strip along with the rolling oil particles. Since the roll is in a state of ro...
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