METHOD FOR ROLLING CHANNEL BARS Russian patent published in 1998 - IPC

FIELD: metallurgy, namely production of rolled bars, particularly equal-flange steel channel shaped bars. SUBSTANCE: method comprises steps of multipass deforming of shaped strip in vertical and horizontal grooved rolls, making developed shape and bending up flanges. In pass just before last but one pass flanges of blank are bent in vertical rolls by 22-26 degrees. In last but one pass blank is rolled in horizontal rolls with elongation 1.1-1.3. At final pass strip is rolled with elongation 1,19-1,25 at simultaneously bending its flanges by 10-14 degrees. EFFECT: enhanced quality of edges of flanges of channel bars, lowered wear of rolls. 4 dwg , 1 tbl