Cherepovets State University, Cherepovets, Russia

A. V. Kozhevnikov, Dr. Eng., Associate Prof., Head of the Dept. of Electric Power Engineering and Electrical Engineering
I. A. Kozhevnikova, Dr. Eng., Associate Prof., Head of the Dept. of Metallurgy, Mechanical Engineering and Technological Equipment

University of Science and Technology MISIS, Moscow, Russia

M. M. Skripalenko, Cand. Eng., Associate Prof., e-mail: mms@misis.ru
M. N. Skripalenko, Cand. Eng., Associate Prof., Scientific Project Expert, e-mail: tfsmn@yandex.ru

Review of skin pass rolling researches was conducted. One of the most often problems is rolls roughness influence on final strip roughness estimation. There are several indexes which are used for that. They are calculated using strip roughness prior and after skin pass rolling, roll’s roughness. Final strip roughness can be controlled by regulation of different parameters. These can be strain, tension, coiling direction, stress state coefficient, etc. Actual problem while skin pass rolling research is estimation of strip material properties. The parameter is offered, it allows predicting whether fluidity site disappears or not fоr the strip material after skin pass rolling. At that, strip thickness reduction limits are detected in order to guarantee fluidity site disappearance. There are several indexes to estimate strength and plasticity of strip material after skin pass rolling. Skin pass rolling can affect corrosion resistance and magnetic properties changing. Mathematic modelling and finite element method (FEM) computer simulation are effective while skin pass rolling research. For instance, one of the developed mathematical models allows increasing of energy-and-power parameters calculation. One of the mathematical models allows predicting strip roughness after skin pass rolling. It is noticed that skin pas rolling FEM computer simulation results differ from experimental ones for not more than 10 %. One of the FEM computer simulation features is estimation of stress-strain state parameters changing when different skin pass rolling parameters are varied. FEM computer simulation also allows visualizing strip roughness prior and after skin-pass rolling in the form of three dimensional topography of strip surface. It is possible to consider rolls roughness and initial strip roughness at FEM computer simulation of skin pass rolling. At that, rolls surface and initial strip surface are described using trigonometrical functions.

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