METHOD FOR ROLLING GROOVED PILES WITH Z-SHAPED CROSS SECTION Russian patent published in 2000 - IPC

FIELD: hot rolling of grooved piles with Z-shaped cross section from semifinished product with H-shaped cross section having bridge and four wings. SUBSTANCE: method comprises steps of rolling semifinished product with use of rolling equipment defining rolling plane in such a way that position of bridge of H-shaped cross section of semifinished product is parallel relative to said plane for making Z-cross section pile having flat bridge forming angle α₀ relative to rolling plane, two lateral wings forming angle β₀ relative to rolling plane and catches on end of each wing; at first introducing semifinished product into previous blank having two portions passing from wing to bridge and parallel relative to rolling plane. Said transition portions join portions designed for making pile wings with mean portion inclined relative to rolling plane. EFFECT: simplified process of hot rolling of Z-shaped cross section grooved pile from H-shaped semifinished product. 11 cl, 13 dwg