FIELD: process engineering.
SUBSTANCE: invention relates to machine building, particularly, to surface straining of inner profiled surfaces. Proposed device comprises case, mandrel, current insulating sleeve, straining tooth, lever and spring. Said levers are arranged opposite each other at said case. Said case is secured at said mandrel. Spring if fitted atop said levers. Straining tooth is composed of two halves, each being secured to lever end.
EFFECT: higher hardness and larger depth of surface hardening, expanded performances of said device.
1 dwg
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| MANDREL | 2011 |
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