METHOD FOR ROLLING ANGULAR ASYMMETRICAL SHAPES Russian patent published in 2005 - IPC

FIELD: rolled stock production, possibly rolling of angular asymmetrical shapes with flanges having different thickness and width values and with both flanges having thickness variable along width.

SUBSTANCE: method comprises steps of forming initial shape in asymmetrical box-type roll grooved passes; after tilting rolled piece by 90є, rolling it in alternating open and closed shaped preparatory roll grooved passes; using roll grooved passes with the same values of angles and rounding radiuses in apexes of upper grooves and with the same values of angles and rounding radiuses of ridges of lower grooves of roll grooved passes; finally forming shape in pre-finish and finish roll grooved passes having the same opening degree and providing equal minimum diameters of flanges by means of lower roll grooves.

EFFECT: accurate geometry of shape having no twisting, simplified schedule of rolling process, enhanced stability of rolled piece.

1 dwg