THREAD MAKING METHOD Russian patent published in 2005 - IPC

FIELD: machine engineering, namely manufacture of threaded parts operating at sign-variable loads and in condition of abrasive wear.

SUBSTANCE: method comprises steps of finish strengthening working of part by means of tools at electrically heating part mounted with possibility of rotation. In order to enhance efficiency and quality of threaded surfaces, working is realized by means of combination tool whose mean portion is made of wear resistant electrically non-conducting material. Electric contact working of lateral surfaces of thread is realized at sliding pressure contact, at supplying electric current to tools and simultaneously applying effort to them. Mean portion of tool is used for working recess and forming micro-geometry and texture of metal fibers. Boundary portions of tool are used for quenching surface layer.

EFFECT: improved efficiency and quality of threaded surface.

1 dwg, 1 ex