METHOD FOR REINFORCEMENT OF ARTICLES HAVING VARIABLE LENGTHWISE SECTION Russian patent published in 2005 - IPC

FIELD: plastic working of metals, in particular, reinforcement of parts having variable section lengthwise thereof and exposed to thermal processing.

SUBSTANCE: method involves depressing rolls in part mid portion by applying radial force P_f; applying axial pushing force P_z to end of part adjoining head toward which rolling motion is provided for pushing article through roll pass up to recess portion while reinforcing the latter for passage; bringing rolls apart; returning article to initial position and simultaneously turning the latter around its longitudinal axis through an angle specified by processing program; performing remaining passages in above sequence, during which first half of article is reinforced; turning article through an angle of 180 deg around vertical axis and providing reinforcement rolling of second half of article in above sequence, with pushing force P_z being applied to head toward which processing is provided; performing low-temperature ageing after termination of reinforcement rolling operation.

EFFECT: wider range of articles to be reinforced and improved quality of reinforcement.

4 dwg, 1 ex