FIELD: technological processes, metal working.
SUBSTANCE: invention is related to the field of metal forming and may be used to make steel pipeline elbow blade profiled along helical line. Steel strip is sent by means of feed unit rollers with profile that is identical to blade profile, under specified angle of bending in bending-twisting roller unit installed at twisting angle, which is directly proportional to bending angle. Steel strip is fed in bending-twisting roller unit at a certain distance from strip surface to axis of closest roller of mentioned unit. Moreover, mechanism for holder displacement in direction of strip feed and in perpendicular direction is made based on condition of provision of connection between displacement values by a certain ratio.
EFFECT: improved quality and efficiency.
2 cl, 2 dwg
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