FIELD: metal processing.
SUBSTANCE: invention relates to metal forming and may be used for production of helical curvilinear air duct. Device includes first supply shafts for metal sheet pulling through, copying mechanism, made with possibility of pulled metal sheet cutting from first supply shafts in longitudinal direction into three strips along straight line or wavy line by preset path, wherein two side strips, having by one straight edge are rolled into rolls for subsequent processing, second supply shafts for pulling through of third, central, strip into edge forming device with formation of connecting locks on side edges with subsequent twisting of strip into spiral shape. Devices are equipped with seaming rollers for locking connections compacting, which have possibility to move across metal strip travel and cutoff device for separation of produced air duct from metal strip. Device versions allow to produce curvilinear air duct from precut by specified path strip.
EFFECT: expanding performances of devices used for producing spiral curvilinear air duct by described above method.
4 cl, 14 dwg
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