FIELD: process engineering.
SUBSTANCE: invention relates to metal forming, particularly, to rotary extrusion with wall thinning. Tubular billet is place around the mandrel to be spinned to shape said billet by at least one forming roller. The latter is displaced axially relative to said billet. Note here that said mandrel can displace axially relative to said billet.
EFFECT: enhanced performances, higher efficiency.
13 cl, 61 dwg
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