Roller type curve design method in thin narrow material smoothing and rolling process

Abstract

The provided method comprises: (a) collecting the parameters on machine and technique; (b) collecting the variety and standard range of strip steel; (c) setting the curve equation for work roller and support roller; (d) optimizing the curve parameters; (e) substituting the parameters into former equations to obtain the optimal equations. This invention ensures product performance index, and can be also used to the condition with broad-thick material without pressing.

Description

technical field [0001] The invention relates to a skin pass design technology, in particular to a method for optimizing the profile curves of work rolls and back-up rolls when a common four-roll skin pass mill rolls thin and narrow materials. Background technique [0002] In production practice, it is found that when the ordinary four-roll skin pass mill rolls thin and narrow materials, the work rolls will contact and flatten the so-called pressing phenomenon outside the width of the plate, so that only a part of the set rolling pressure is used for metal deformation. Other parts are consumed in the flattening of the roll ends of the work rolls, resulting in a relatively small actual elongation, and the mechanical properties of the product cannot meet the user's requirements. Moreover, after the pressing occurs, as the rolling pressure increases, the proportion of its consumption in the roll end flattening of the work rolls also increases. When the rolling pressure increase...

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Problems solved by technology

[0003] In order to control the impact of pressure and eliminate the harmful contact area between the rolls, in the past, people generally only considered the plate shape and roll consumption in the roll profile design of the skin pass mill. For example, Baosteel 18003#CGL published by Bai Zhenhua, Gu Tingquan, and Wu Anmin Research on roll profile technology of hot-dip galvanizing skin pass mill, "China Mechanical Engineering" 2006, 17(1); 33-35; Bai Zhenhua, Lian Jiachuang, Liu Feng and Wang Jianqiang published roll profile of Baosteel 2050 hot rolling mill Research on optimization technology "Steel" 2002, 37(9); 35-38; the research objects of these disclosed technologies are mainly rolling ordinary strips, but no thin and narrow material group has been found as the research object, while ensuring the mechanical properties of the product The roll shape design method with the shape index can be found in the literature

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