ROLLED REINFORCEMENT PRODUCING METHOD Russian patent published in 2007 - IPC B21B1/16 

FIELD: production in bar rolling mills steel reinforcing articles with screw protrusions for threaded joints.

SUBSTANCE: method comprises steps of multiple reduction of strip in "oval-circle" gage system at forming in prefinal pass oval-shaped profile with concave long sides and in final pass forming round profile with screw protrusions. Invention provides improved quality and increased yield of process for making reinforcing rolled pieces with screw protrusions due to elimination of shape distortion of products in the result of forming oval having height-to-width relation in range 2.3 -2.5 and due to forming in final pass profile in the form of two symmetrical arcs of the same circle with radius equal to radius of oval apex mutually joined by rectilinear portions at reducing strip in such pass at elongation degree 1.3 - 1.5.

EFFECT: enhanced efficiency of method, improved quality of products.

2 cl, 1 dwg, 1 tbl, 1 ex