METHOD OF COLD DEFORMED BAR ROLLING OF PIPES Russian patent published in 2011 - IPC B21B21/00 

FIELD: technological processes.

SUBSTANCE: in method of cold deformed bar rolling of pipes a rolled cartridge prior to each forward motion of deformed bar rolling is fed by one step, fixed relative to a mill stand and then deformed plastically by rollers of a double-roller rolling mill that makes reciprocal movement, besides, rollers have a pass of alternating radius. Reduced values of tension or backing that occur in process of plastic deformation of the cartridge are provided as a result of the fact that forward displacement of a mill accompanied with rotation of rollers is carried out so that displacement of the mill and the angle of rotation of each rolling mill are in a ratio regulated by a mathematical dependence.

EFFECT: expansion of technological capabilities of equipment during cold longitudinal cold deformed rolling of pipes on a mandrel.

3 dwg