METHOD OF BLANKS CUTTING FOR LARGE-SIZED PANELS FORGING FROM ROLL OF THIN-SHEET LOW-CARBON STEEL (VERSIONS) Russian patent published in 2016 - IPC B21D28/02 

FIELD: technological processes.

SUBSTANCE: invention relates to pressure metal treatment and can be used during production of large-sized panels from sheet material by forging. First workpiece is cut after supply of sheet material roll on the step for each press stroke through the first and second die blades. Cutting by first curve is performed by first blade, and by second blade is along second curve from top to bottom side of the roll. Lower parts of first and second curves are plotted, first, as symmetric and mirror reflection of upper part of said first and second curves relative to vertical axes, passing through centers of those curves, and then, as symmetric and mirror reflection relative to roll horizontal axis of symmetry. At the same time, second workpiece is cut from roll by second die blade.

EFFECT: result is higher resistance of used tooling and increase in material use factor.

4 cl, 4 dwg