FIELD: calibration and straightening large-diameter tubes after their hot bending.
SUBSTANCE: apparatus includes rotary platform mounted in drive shafts normally relative to straightening axis and having guides, slide and carriages with outer calibrating rollers. Carriages are arranged in guides of platform diametrically relative to straightening axis and they are kinematically connected one with other by means of hydraulic cylinders. Slide with inner calibrating roller is mounted on platform and it is joined with motion drive unit. At straightening and calibrating at first ends of tubes are deformed by means of outer calibrating rollers in elastic deformation range and then by means of inner and outer calibrating rollers in contact zone plastic deforming is provided.
EFFECT: enhanced quality of straightening and calibrating due to providing out-of-roundness of tube ends in predetermined range.
3 dwg
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