METHOD OF CUTTING OF BLANKS FROM BAR Russian patent published in 2000 - IPC

FIELD: working of metals by pressure. SUBSTANCE: method allows cutting of blanks and their length is smaller than diameter. Bar is delivered to working position, clamped in radial direction with simultaneous formation of sickle-shaped cuts on its side surface, at a distance equal to delivery step from cutting plane and from one another. Axial force is applied to end of blank being cut, and then blank is separated by shift. With every displacement step of bar, the latter is turned about its axis through angle α = 90 deg/(n-1), where n is number of pairs of sickle-shaped cuts. EFFECT: improved blank quality. 2 dwg, 1 ex