МРНТИ 55.03.03                                                                                           №1 (2021г.)

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Mashekov S.A., Akparova S.A., Tussupkaliyeva E.A., Sembayev N.S., Sekerbek   A.M.

The longitudinal-wedge mill (LWM) of a new design is proposed in this article. By using the software product of finite element analysis MSC.visualNastran 4D and MSC.SuperForge we carried out a computer modeling of the longitudinal strip rolling process and calculated the stress-strain state (SSS) of a billet and also calculated the SSS and the vibration of heavily loaded elements of LWM with two support rolls in all stands. As a result of modeling, it was found that the strips rolled in a LWM with two support rolls in all stands have a longitudinal and lateral non-uniform thickness, which are the result of vibration of the working roll. It was shown that strips rolled in a LWM with two support rolls in all stands have a wavy surface. We proved that when rolling strips in a LWM with two support rolls, insecure vibrations do not fall into the operating range of existing external loads, this is why the design of a new mill is good enough from point of view of hardness when vibrating. To eliminate the “ribbing” defect, it was proposed to use four supporting rolls in the last stands of the LWM.
Keywords: longitudinal-wedge mill, rolls, stands, bearings, stress, deformation, thin strip, non-uniform thickness, flatness, vibration.

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