RADIAL FORGING METHOD OF HEXAGONAL SECTIONS Russian patent published in 2015 - IPC B21J5/12 

FIELD: metallurgy.

SUBSTANCE: cyclic swaging of a workpiece is performed simultaneously with two mutually perpendicular pairs of strikers. A hexagonal section is obtained in each cycle. Strikers of one pair has a smooth working surface. Strikers of the second pair have cutout grooves with surfaces inclined to each other at an angle of 120°. Working surfaces of mutually perpendicular strikers are offset relative to each other along a forging axis by a value exceeding the length of the working surface of the striker. Swaging of the workpiece in each cycle, except for the first one, is performed by a value that does not exceed difference of diameters of the described circle of the hexagonal section obtained in the previous cycle, and an inscribed circle of the hexagonal section obtained in the considered cycle. After each cycle, the workpiece is turned about the forging axis through angle π/n, where n=6 - number of faces of a hexagonal section.

EFFECT: obtaining quality hexagonal sections at enlargement of the range of initial workpieces and obtained items.

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