METHOD FOR THREAD ROLLING BY MEANS OF ROLLERS AND APPARATUS FOR PERFORMING THE METHOD Russian patent published in 2002 - IPC

FIELD: thread rolling in thread-rolling machine tools with roller-roller type tool. SUBSTANCE: apparatus includes housing in which shafts are mounted with constant interaxial spacing and with journals arranged eccentrically relative to shaft axes in order to provide summed eccentricity value of shifting relative to shaft axes no less than height half of thread profile. Rollers are rigidly fixed onto shaft journals with possibility of adjusted rotation around axes before their rigid fixation onto shaft journals by means of friction clamps. Method comprises steps of forming thread profile at simultaneously acting upon blank at opposite sides by means of two rollers synchronously rotating in the same direction, rigidly fixed and shifted relative to their rotation axes by eccentricity value being no less than height half of profile of rolled thread and mounted with possibility of adjusted rotation around their own axes before rigid fixation. EFFECT: enhanced accuracy of rolled thread, simplified design of apparatus due to use of two thread rolling rollers. 7 cl, 1 dwg