Roll profile design method for hot rolling skin pass mill based on multi-segment roll profile curve fitting

Abstract

The invention relates to a working roll forming design method, and by means of the method, flattening machine working roll rolling kilometers can be increased, and the product strip shape quality can be improved. To be specific, according to the method, on a hot rolling flattening machine without using roll shaft axial displacement, by conducting design for working roll forming curves, the aims that the hot rolling flattening machine working roll rolling kilometers are increased, and the strip shape quality is improved are achieved. By the method of superimposing a compensating curve onto a working roll initial forming curve, a special working roll forming curve is formed. A working roll initial forming curve coefficient is determined according to the strip shape control capability of the flattening machine and the practical production condition at the site, while parameters of all segments of the compensating curve are mainly determined through positions and dimensions for compensating abrasion of rollers and curve characteristics, and when the two groups of curves are determined, multi-segment functions are superposed as per different zones. The practical application indicates that by means of the hot rolling flattening machine working roll forming technology, the rolling kilometers of the working roll can be effectively increased, the strip shape quality can be improved, and the production cost can be reduced.

Description

Technical field: [0001] The present invention relates to metallurgical machinery, automation and rolling technology, and specifically refers to a work roll shape that can improve the rolling kilometers of work rolls and the quality of product shape in hot rolling tempering mills by superimposing multi-segment curve fitting and initial roll shape. design method. Background technique: [0002] In the production line of the hot-rolled tempering mill, the shape of the strip product is mainly related to the shape of the load-bearing roll gap of the rolling mill. There are two main factors affecting the shape of the load-bearing roll gap of a rolling mill: one is the shape of the roll, and the other is the elastic deformation of the roll. The former is determined by the initial roll shape of the roll, the wear of the roll and the thermal deformation of the roll, etc., and the latter is related to the load borne by the rolling mill. For different rolling mills, their influence on...

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Problems solved by technology

[0008] In order to solve the above problems, the object of the present invention is to provide a roll shape design method based on the statistical analysis of a large amount of data, which adopts multi-segment function superimposed in different areas, which is used to increase the rolling kilometers of the work rolls of the hot rolling pass mill, and compensate for the The serious uneven wear of the rolls caused by the inherent defects of the raw materials leads to the problem of the decline in the quality of the plate shape, and the rolling kilometers of the working rolls of the hot rolling mill and the quality of the plate shape of the product are greatly improved

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