FIELD: plastic working of metals, working openings.
SUBSTANCE: method comprises steps of pulling broach through opening at tightness; at working deep openings and inner cone surfaces pulling broach through opening due to mutually screwing broach and arranged symmetrically along axis threaded rod to which blank is secured. Apparatus includes broach with threaded opening where threaded axially symmetrical rod is arranged. On outer surface of broach there is thread whose pitch exceeds that of internal thread. Threaded rod is used for joining with blank. Broach may have cone outer surface; its outer thread may be multi-start thread.
EFFECT: possibility for working deep openings, inner cone surfaces.
4 cl, 1 dwg
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