METHOD FOR MAKING ROLLED BARS AND ROLLED RODS IN CONTINUOUS MILL Russian patent published in 2003 - IPC

FIELD: rolled stock production, namely processes for rolling bars and rods in continuous bar rolling mills, small bar rolling mills, small bar and wire rolling mills, wire rolling mills. SUBSTANCE: method comprises steps of heating blank before rolling it in heating furnace with temperature varying along blank from its leading end to rear end according to manufacturing process; rolling blank in continuous rolling mill with predetermined deformation rate conditions. Blanks are heated in heating furnace before rolling for providing temperature wedge due to increased temperature of rear end of blank relative to its leading end. Temperature drop ΔT of heated blank from its leading end to rear end is determined according to formula ΔT = k(T₀-610)L₀μ₀/V_r, where k is proportional coefficient equal to 0.0005-0.0008; To is temperature of blank heating determined according to rolling conditions, C; Lo is blank length, m; μ₀ is total elongation of metal at rolling; Vr is rolling rate in finish rolling stand of continuous rolling mill. EFFECT: enhanced accuracy of geometry parameters of ready rolled product along it, stable operation modes of system for automatic control of rolling process due to compensation of temperature wedge formed at guiding blank to first stand of mill by means of reverse temperature wedge created in furnace. 1 ex