METHOD OF BROACHING AND SIDE DELIVERY OF BUSHING ON STAND OF HELICAL ROLLING Russian patent published in 2009 - IPC B21B19/00 

FIELD: metallurgy.

SUBSTANCE: invention relates to field of pipe rolling, particularly to method of broaching and side delivery of thick-walled sleeves at stand of helical rolling. Method of broaching and side delivery at stand of helical rolling includes broaching of sleeve, centering of rod with mandrel by roller of center, moving apart of rollers of centers for keeping of sleeve at least its outlet from stand rollers, lifting of transporting rollers for keeping and moving of sleeve with simultaneous extraction of rode with mandrel from sleeve, delivery of sleeve sideways from rolling axis, return of rod with mandrel by transporting rollers into operation position. Keeping and moving of sleeve by transporting rollers after broaching process or inclined to its or inclined relative to rolling axis, and return of rod with mandrel into operation position - by axis of rolling or inclined relative to rolling axis. Additionally maximal value of lifting of keeping and moving axis of sleeve by transporting rollers over rolling axis, and also lifting value of keeping and moving axis of sleeve by transporting rollers at different position of axis over rolling axis are calculated by particular correlations.

EFFECT: there is provided receiving of upgraded quality thick-walled sleeves at high efficiency of stand.

5 cl, 8 dwg, 1 ex