ROLL TYPE BENDING MACHINE Russian patent published in 2007 - IPC B21D5/14 

FIELD: plastic working of metals, possibly twisting elongated tubular small-diameter shells from sheet.

SUBSTANCE: machine includes mounted in housing drive upper and lower rolls, drive rotary levers with common rotation axis and bending units. Said bending units include beams arranged in parallel at both sides of rolls and rigidly fastened by their ends with rotary levers; shaping cleats secured to said beams. Predetermined bending radius of shells with cylindrical or cone surface is provided by regulating position of shaping cleats relative to axis of rolls.

EFFECT: enhanced accuracy of tube geometry.

5 dwg