FIELD: cold treatment of metals and alloys by surface plastic deformation. SUBSTANCE: apparatus has mandrel, rod, separator, deforming member resting upon flexible support mounted for axial displacement by means of wedge mechanism, two deforming members arranged in diametrically opposed relation to casing axis. Such construction allows stable quality and regular microrelief to be provided by variable rigidity of apparatus, with rigidity extent being set by regulating mechanism. EFFECT: increased efficiency and improved quality of treated surface. 1 dwg
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