SYSTEM OF ROLL GROOVED PASSES OF CONTINUOUS BAR ROLLING MILL Russian patent published in 1997 - IPC

FIELD: metallurgy, namely rolled bar production. SUBSTANCE: in system of roll grooved passes of continuous rolling mill for double rolling of reinforcing shapes from initial blank in rough and intermediate roll grooved passes, at first intermediate round piece is made. Then rolled piece is fed to rhombic grooved pass with two centrally symmetrical extensions on its mutually opposite faces, to diagonal square roll grooved pass with rounded ribs and convex faces, to rough double grooved pass, separating pass, prefinal and final roll grooved passes for rolling shapes by two strands. Novelty is quantitative normalization of extension height of rhombic roll grooved pass in dependance upon size of profile of reinforcing shape and length of interstand spacing behind stand with rhombic roll grooved pass and also normalization of height of extensions of faces of square roll grooved pass. EFFECT: necessary angle of twisting of tilted rolled piece, accurate guide of rolled piece to next stand. 3 dwg