SYSTEM OF ROLL GROOVED PASSES FOR ROLLING ROUND SHAPE AND ROLLING MILL FOR ROLLING SUCH SHAPES Russian patent published in 1996 - IPC

FIELD: round shape rolling. SUBSTANCE: method of continuous rolling of shaped rod from blank up to predetermined accurate-dimension final cross section in successively mounted one after another rolling stands with pairs of rolls, whose paired axis are arranged normally one to another and having grooved passes placed one opposite to another and defining profile of cross section of rod being passed, comprises step of subjecting rod in one or in several rough stands to rough local sizing in range of perimeter of its cross section, which after the last rough rolling stand enters to next rolling stand in zone of contact of line of both rolls of that stand in such a way, that each time the whole material of the rod, being rolled and guided to that main stand, fills grooved pass of that main stand without significant deformation of profile of the rod of the material being rolled in the above mentioned zone of roll contact line. EFFECT: enhanced structure of roll grooved pass. 5 cl, 11 dwg