FIELD: process engineering.
SUBSTANCE: invention relates to machine building, particularly, to hardening bores by flaring. Mandrel balls are fitted in groove. The latter represents endless loop made up of two screw branches of opposite directions. First screw branch features one-step longitudinal length and allows balls to roll from start to end. End with first screw branch start is connected with second screw branch of the first branch pitch and serve to return deforming elements. At the intersection of aforesaid branches, deforming elements return via return channel drilled in mandrel body under first branch.
EFFECT: expanded processing performances, higher quality and efficiency.
4 dwg
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