FIELD: process engineering.
SUBSTANCE: invention relates to machine building and can be used in fabricating joint of welded pipelines. Split female die with detachable crosswise channels is used to mould the billet of hollow part with branch pipes hydraulically. Tubular billet is strained by filler acting on the billet inner surface. Simultaneously, billet faces are swaged out. Produced hollow part outer layer billet accommodates inner layer billet, a tube billet. Assembled billets are hydraulically formed in split female die. Filler pressure is applied to tube biller inner surface, while billet faces are swaged out.
EFFECT: higher hardness and surface quality.
1 dwg, 1 ex
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