APPARATUS FOR BENDING ELONGATED TUBES Russian patent published in 1999 - IPC

FIELD: rolled tube production, namely bending elongated tubes and coiling them. SUBSTANCE: apparatus includes housing with base and cover. In turnings of housing on rolling bearings three shafts and their rotation drive with gear wheels are arranged. Said shafts are provided with driven bending rollers mounted by cantilever fashion. Spindle with inner eccentric turning is mounted inside housing. Toothed holder is mounted on spindle and it engages by its outer gearing with gear wheel of shaft of mean roller and by its internal gearing - with gear wheel of shaft carrying roller and arranged in turning of spindle. Eccentricity value "e" of spindle turning is equal to interaxial distance "a" of internal gearing of holder that is why at spindle rotation gear wheel of shaft carrying roller is always engaged with toothed holder. EFFECT: enhanced reliability of apparatus, reduced time period for changing bending rollers, simplified construction and service procedure. 3 dwg