ROTARY DRAWING DEVICE Russian patent published in 2019 - IPC B21D22/16 

FIELD: machine building.

SUBSTANCE: invention relates to sheet metal working with pressure, in particular, to tooling of rotary drawing machines on mandrels of hollow thin-walled parts by spinning rollers. Device comprises a mandrel, a clamp for fixing and fixing a workpiece and at least one spinning roller. Mandrel is made with a trunnion fixed with a tenon in the base. Clamp is installed on trunnion neck with possibility of rotation around mandrel in one and another direction under force of spinning roller, moving during rotary drawing of hollow parts with symmetrical profile along contour and forming corresponding mandrel along helical line, or turning through an angle determining the allowable length of overlapping of final sections of each passage of rotary drawing on one of long sides of hollow parts with an asymmetric profile in changing direction of reciprocal circular motions of the spinning roller around the corresponding mandrel sequentially performed along its generatrix. Extended part of the clamp is made with a support cantilever provided with clamp of the working position of the clamp, and possibility of removal of the clamping heel from the removed semi-finished part of the hollow part by turning in the horizontal plane.

EFFECT: enlarging technological capabilities of the device due to increased range of manufactured hollow parts.

1 cl, 3 dwg