METHOD FOR STRAIGHTENING ROUND ROLLED PIECES Russian patent published in 2002 - IPC

FIELD: plastic metal working, namely processes for straightening round rolled products such as tubes. SUBSTANCE: method comprises steps of changing eccentricity values of rings according to predetermined schedule of straightening, namely at straightening front and back ends of rolled piece using minimum number of standard rings; placing them by groups at maximally possible approaching of one to another and realizing inclination system of rings necessary for motion at eccentricity value in group equal to 0.8-0.9 of its tuned value; at straightening mean portion of rolled piece using at least four correct rings distributed along length of straightening zone and setting eccentricity according to nominal value while taking into account changed spacing between rings. EFFECT: enhanced quality of straightened rolled products due to use of different straightening systems with changed eccentricity of straightening rings. 19 dwg, 1 ex