METHOD OF BORE SIZING WITH PLANETARY OSCILLATION MOTION Russian patent published in 2012 - IPC B24B39/02 

FIELD: process engineering.

SUBSTANCE: invention relates to machine building, particularly, to finishing-hardening of bores by surface plastic deformation. Sizing mandrel axially reciprocates and effects planetary return rotation relative to planetary axis offset with respect to is primary lengthwise axis. Used is sizing mandrel comprising body with radial blunt holes, deforming balls and distance bars. The latter are fitted to slide in the body blunt holes in reciprocation along bore axis. Deforming balls are arranged on distance bar end faces. Deforming ball on distance bar outer end face is retained by separator. Coil compression spring fitted in aforesaid blunt hole acts on bar inner end face.

EFFECT: higher machining efficiency and tool strength.

5 dwg