FIELD: machine building.
SUBSTANCE: cylinder-conic work piece with a conic section with the minimum generatrix slope angle 30° and the certain thickness of the wall obtained by machining. Heat treatment of work piece, rotational extraction with shell thinning within several operations, heat treatment between rotational extraction operations are performed for removal of tension and machining of process bulks and laps.
EFFECT: quality of shell is improved due to decrease of metal flow upstream rollers.
3 dwg, 1 ex
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