A Method for Predicting Strip Edge Thinning During Cold Rolling in a Six-high Mill

Abstract

The invention provides a prediction method for strip steel edge drop in the cold rolling process of a six-roller rolling machine. The prediction method comprises the following steps that (a) main equipment and technological parameters in the cold rolling process of the six-roller rolling machine are collected; (b) the flattening coefficient transverse distribution modified function Kmb (x) of middle rollers and supporting rollers as well as the flattening coefficient transverse distribution modified function Kmw (x) of the middle rollers and work rollers are built; (e) the flattening coefficient transverse distribution modified function Kwd (x) of the work rollers and strip steel is built; (d) according to roller elastic deformation, metal plastic deformation and deformation coordination relations of roller elastic deformation and metal plastic deformation, the transverse distribution value h1j of the strip steel is calculated; (e) the optimum values of the weighted fitting coefficients b2, b4 and b6 of the inter-roller flattening coefficients and the optimum values of the weighted fitting coefficients c2, c4 and c6 of the flattening coefficients of the work rollers and the strip steel are calculated; and (f) the edge drop area width alpha b, the average drop thickness beta hav, the middle-position drop thickness beta hmid and the maximum drop thickness beta hmax are calculated. Simultaneous predication of the edge drop width and the edge drop thickness of the strip steel in the cold rolling process of the six-roller rolling machine is achieved, and the accuracy of prediction of strip steel edge drop in the cold rolling process of the six-roller rolling machine is effectively ensured.

Description

technical field [0001] The invention belongs to the technical field of cold rolling, in particular to a method for predicting edge thinning of strip steel during cold rolling. Background technique [0002] In recent years, with the rapid development of the national economy, the market demand for cold-rolled strip products is also increasing. At the same time, as plate and strip users gradually move from low-end to high-end, users have higher and higher requirements for the edge quality of cold-rolled products. Edge thinning, as one of the important characteristics in the strip cold rolling process, directly affects the edge quality of the strip. In order to ensure the quality of the edge of the product on site, it is often necessary to cut off the thinned part of the edge of the strip with a disc. Therefore, the width of edge thinning in the cold rolling process of strip steel plays a decisive role in the yield of finished strip steel. The smaller the width of the thinned...

AI Technical Summary

Problems solved by technology

However, looking at all the literature, the research on strip edge thinning is mainly based on the analysis of the thinning amount, and there is no research on the thinning width.

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