METHOD FOR FINISHING AND STRENGTHENING CYLINDRICAL AND SHAPED OPENINGS Russian patent published in 2007 - IPC B24B39/02 

FIELD: manufacturing processes in machine engineering, namely methods for finishing and strengthening cylindrical and shaped openings.

SUBSTANCE: method comprises steps of imparting reciprocation motion and rotation to strengthening tool; using tool having deforming members in the form of springs with elliptical turns, body in the form of sleeve with radial slits and loading mechanism in the form of central rod with cone surfaces. Said radial slits are arranged in one or in several levels of body cross sections and are designed for placing spring turns inside them. Each spring is mounted inside body at its own level, it is coiled to ring and embraces respective cone surface of central rod. Each cone surface of central rod has guiding lengthwise grooves whose number and width are equal respectively to number and width of spring turns. Radial feed of spring turns is realized due to moving central rod relative to tool body.

EFFECT: enlarged manufacturing possibilities.

3 dwg, 1 tbl