TENSION BOX GROOVED PASS Russian patent published in 2001 - IPC

FIELD: rolled stock production, namely, rolling metallic blanks in bar rolling mills, mills for rolling large, mean and small billets, rod rolling mills. SUBSTANCE: tension box grooved pass includes lateral walls, bottom and joining members having radius determined by expression: r=(0.65 - 1.25)(в_c.l.- в_b), where r is radius of joining walls and bottom of grooved pass, mm; в_c.l., в_b is width values of grooved pass along connection line and bottom respectively, mm. Depth of grooved pass is determined by expression h_g=(0,20-0,32)h_o, where h_g is depth of groove, mm; h_o is height of rolled piece guided to grooved pass, mm. Outlet of grooved pass ϑ = в_c.l.- в_b/2h_g = x 100%=(16 - 28)%. EFFECT: enhanced strength of grooved pass due to improved uniformness of its wear along perimeter, lowered metal consumption due to improved quality of billets. 1 tbl, 1 dwg