METHOD OF STATIC-PULSE HARDENING OF INTERNAL LARGE-SIZE THREADS Russian patent published in 2020 - IPC B24B39/02 B21H3/08 

FIELD: machine building.

SUBSTANCE: invention relates to static-pulse treatment of inner surface of large-size part thread on lathe. Mechanical pulses are transmitted via a waveguide, the roller is pressed to the thread surface by means of a spring and the roller is moved in the axial direction of the hole by means of a longitudinal feed of the lathe. Waveguide-yoke is used, which comprises axis dividing waveguide-yoke on arms, which is fixedly fixed on support of lathe with possibility of changing position of waveguide-yoke, which ensures change of force acting on roller.

EFFECT: broader technological capabilities.

1 cl, 1 dwg