SIMULATION MODELING OF ASYMMETRIC SHEET ROLLING STABILITY

Author:

KOZHEVNIKOV A. V.1,SMIRNOV A. S.1,PLATONOV YU. V.1,KOZHEVNIKOVA I. A.1,ZHILENKO S. V.2

Affiliation:

1. Cherepovets State University, Russia, Cherepovets

2. PAO Severstal, Cherepovets, Russia

Abstract

Asymmetric rolling using work rolls of different diameters is one of the ways to reduce production costs and optimize the roll stock. It is shown that the use of technology of asymmetric continuous sheet rolling in rolls with different diameters requires the solution of new technological problems associated with the treatment of steel sheets by pressure in conditions of different contact arc lengths in the deformation center. One of the risks of this rolling method is the occurrence of slippage of work rolls relative to the strip, which may lead to the emergence of negative self-oscillation effects. The paper presents the results of simulation of strip gripping stability at different grades in order to eliminate slippage during asymmetric rolling in rolls with different diameters and the same circumferential speed at constant rolling speed. Ways of identifying technological modes, inclined to appearance of rolling process instability in the form of rolls slipping relative to the strip, are offered. Recommendations on the optimum value of roughness of working rolls during asymmetrical rolling on various sections are given

Publisher

South Ural State University

Subject

General Medicine

Reference8 articles.

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2. Tselikov A.I., Nikitin G.S., Rokotyan S.E. Teoriya prodol’noi prokatki [Theory of longitudinal rolling]. Moscow: Metallurgiya, 1980, 320 p. (In Russ.).

3. Kozhevnikov A.V., Smirnov A.S., Kozhevnikova I.A., Antonov P.V., Zhilenko S.V., Aralov A.I. Investigation of self-oscillations and development of process stabilization method in a continuous cold strip rolling mill. Metallurg, 2020, no. 8, pp. 36–42. (In Russ.).

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