TUBE COLD ROLLING METHOD Russian patent published in 2003 - IPC

FIELD: plastic metal working, namely production of cold deformed tubes in rolling mills with two rows of rolls and rollers. SUBSTANCE: method for cold rolling of tubes comprising steps of preparing blank for rolling and rolling blank by stroke feed of blank to deformation zone formed by two pairs of rolls; deforming fed length portion of blank successively between first and second pairs of rolls at their reciprocation motion on stationary mandrel; performing preliminary preparation step at using high-temperature supersound gas-flame jet including abrasive particles. EFFECT: enhanced quality of ready products, lowered cost for making them. 7 cl, 1 tbl