PART THREADING METHOD Russian patent published in 2005 - IPC

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

SUBSTANCE: method comprises steps of forming geometry and finishing-strengthening full profile of thread by angle equal to nominal one with use of tool moving along helical line while electrically heating part mounted with possibility of rotation. In order to enhance quality of helical surfaces before finishing-strengthening, thread is shaped by angle of its profile less than nominal one. At further finishing-strengthening procedures desired geometry of thread, surface roughness, texture of metal fibers and structure of surface layer of lateral portions and base are provided.

EFFECT: enhanced quality of thread.

1 dwg, 1 ex