Power conditions of rolling in universal calibers of modern rail-beam mills

Development of rolling stock, increase in the speed transportation, load-bearing capacity highways and their length requires constant improvement production technology for railway rails. Modern rail-beam mills have composition a continuously reversible group stands, which includes universal stands. Rolling rail profiles calibers is radically different from two-roll calibers, at moment not well studied, both theoretically practically. The article defines conditions feasibility process with pair non-drive rolls, taking into account values active (reserve friction forces) acting drive rolls reactive forces roller fittings. energy balance method solves problem determining back-up force required deformation rolls. When solving equation equilibrium center formed by reserve defined, magnitude largely determines possibility process. Theoretical dependences are obtained estimating power during modern mills, provided support Information about caliber necessary to analyze it under various modes clarify drawing coefficients elements resulting profile. Dependencies proposed that allow consumption operation fittings serviced caliber. well-known formula A.I. Tselikov A. I. Grishkov on definition broadening was clarified relation two side effects change size sole head profiles.