A Method for Predicting the Surface Roughness of Strip Wet-leveling
A surface roughness and prediction method technology, applied in metal rolling, metal processing equipment, manufacturing tools, etc., can solve problems such as inability to use process operations, and achieve fast calculation speed, direct and effective speed, and high universality Effect
Active Publication Date: 2020-01-21
SHANGHAI MEISHAN IRON & STEEL CO LTD
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Problems solved by technology
From the above patents, it can be seen that the control of the roughness of strip steel after leveling is a worldwide problem, because there are many factors affecting the roughness, and the law of how these factors affect the roughness after leveling is not clear, so only Use fuzzy method or genetic algorithm to statistically summarize the influence of various factors to obtain a regression function based on actual results, which also leads to obvious limitations of these methods
In addition, these patents are not aimed at wet leveling (the important parameter of lubrication is not considered), so they cannot be used for wet leveling process operations
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[0034] The present invention will be further illustrated below in conjunction with specific embodiments, and it should be understood that the following specific embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention.
[0035] A method for predicting the wet level surface roughness of strip steel, the method comprising the steps of:
[0036] (1) The average initial roughness R of the known leveling roll a0
[0037] Ra 1 —The roughness of the operation side of the upper roller is 0.41;
[0038] Ra 2 —The middle roughness of the upper roller is 0.39;
[0039] Ra 3 - The roughness of the drive side of the upper roller is 0.40;
[0040] Ra 4 —The roughness of the operating side of the lower roll is 0.39;
[0041] Ra 5 —The middle roughness of the lower roll is 0.41;
[0042] Ra 6 —The roughness of the driving side of the lower roller is 0.40; then it can be obtained:
[0043] R a0 - Average initial...
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Abstract
The invention provides a method for predicting the strip steel wet-leveled surface roughness. The method comprises the steps that (1) leveling parameters of a leveling machine are collected; (2) the online roughness of the strip steel is collected, and the average roughness of the strip steel in the length range of L and the average reduction rate of a corresponding rolling machine are figured out; (3) the roughness of the leveled strip steel is figured out, specifically, as for the mathematical expression of the roughness of the leveled strip steel, please refer to the specifications; and (4) the target roughness value of the strip steel is compared with the predicted roughness value, and the leveling parameters are adjusted according to the difference value between the original roughness and the final roughness of the strip steel by combination with a roughness control model so that the target roughness value of the strip steel can be in the set prediction interval. According to the method, by establishing the leveled strip steel surface roughness control model and predicting the roughness of the strip steel online, measures can be taken in time if the roughness of the strip steel does not meet the requirement, and the situation that strip steel with unqualified roughness is produced in batches is avoided.
Description
Technical field: [0001] The invention relates to a method for predicting the wet leveling surface roughness of strip steel, which belongs to the technical field of cold rolling. Background technique: [0002] Surface roughness is an important indicator of the surface topography quality of cold-rolled strip steel. In the production process of cold-rolled strip tin-plated substrates, leveling operations are often used to adjust surface roughness and control surface defects to obtain suitable electroplating surface quality. If the surface roughness of the steel plate does not meet the requirements, it will seriously affect the user's subsequent stamping, painting and coating processes, resulting in the scrapping of parts, bringing major hidden dangers and property losses to production. [0003] At present, cold-rolled strip steel mostly adopts dry skinning or wet skinning process to skin the steel strip. Among them, wet skinning has attracted more and more attention from manuf...
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IPC IPC(8): B21B37/00
CPCB21B37/00
Inventor 汪峰徐烨明王天顺
Owner SHANGHAI MEISHAN IRON & STEEL CO LTD