DEVICE FOR PIPE DOUBLE-SIDE BENDING Russian patent published in 2015 - IPC B21D7/24 

FIELD: metallurgy.

SUBSTANCE: on bedplate pipe clamping assembly, bending mandrel, axis and bending roller are installed. The pipe clamping assembly is made in form of two mating U-shape elements with internal surface, response external surface of pipe. The bending mandrel is made with possibility of the pipe double-side bending in one plane, and with forming surface response to the external surface of the bent pipe. The bending roller is made with forming surface response to the external surface of the bent pipe, and with three straight planes. The first plane is made parallel to axis of the bending roller, and is at distance from axis 0.15-0.25 of diameter of the bending roller. Second plane is made parallel first along axis of the bending roller by half of height of the clamping assembly. The third plane is made perpendicular to the second plane of the line at height of the clamping assembly. The bending roller is located with possibility of rotation on axis of the bending roller, which is located in U-shape clevis, which in its turn is installed with possibility of rotation around the axis of the bending roller drive on the bedplate. Axis of the bending roller is located in U-shape clevis ensuring contact of the second and third planes of the bending roller with surfaces of the pipe clamping assembly and forming surface of the bending roller with forming surface of the bending mandrel.

EFFECT: increased surface quality of bent pipe.

4 dwg