DEVICE FOR THREAD STRENGTHENING Russian patent published in 2009 - IPC B24B39/00 

FIELD: mechanics.

SUBSTANCE: device comprises at least two disks for preliminary and final strengthening, where turns of helical spring are installed with working part shaped as threaded groove of processed thread, and rectilinear fastening part. Helical spring installed on disk for preliminary strengthening is made of steel springy tape. Helical spring installed on disk for final strengthening is made of steel springy circular wire. There are deforming parts between working and fastening parts of turns. Peripheral surface of disk, where turns are fixed, represents the ring made of thin steel springy tape and installed on rubber bushing in hub. Tops of turns are connected to each other by ring that is rigidly fixed on every top of turn.

EFFECT: expansion of technological resources of surface plastic deformation process, improved parameter of processed surface roughness, increase of its hardness, higher efficiency of processing, lower prime cost of process.

6 dwg, 1 ex, 1 tbl