FIELD: technological processes.
SUBSTANCE: group of inventions relates to the field of sheet metal processing processes by rotational extrusion and can be used for cold drawing of thin-wall articles from low-plastic sheet workpieces. Shaping of article is carried out on mandrel in one transition by longitudinal and circular passes of spinning roll. At that, on the workpiece of the item there additionally installed is identical sheet easily deformable pad with thickness selected depending on plasticity degree of sheet billet, and jointly fixed by clamp on end of mandrel, then performing their deposition on mandrel. In other versions of the invention, an elastic ring is concentrically installed on the end of the mandrel.
EFFECT: improved quality of articles due to reduced effect of elastic deformations.
9 cl, 3 dwg
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