METHOD OF SURFACE HARDENING FOR FERROMAGNETIC GEAR WHEELS AND DEVICE FOR ITS IMPLEMENTATION Russian patent published in 2014 - IPC B24B39/04 B21H5/00 

FIELD: machine building.

SUBSTANCE: invention refers to machine building industry, namely, to surface hardening of gear wheels made from ferromagnetic materials. One gear wheel is mounted on a shaft, the other - on an axis. Interlocking arrangement of the gear wheels is provided. Gear wheels are installed in the inner cavity of a split casing which is filled by cast iron shot with the diameter of 0.1-0.4 mm. The split casing is placed in the through groove of a magnetic conductor. Angular motion of the gear wheel set on the shaft is provided by an external drive along with turning of the other gear wheel in relation to its own axis during 0.1-0.2 hours. The magnetic conductor forms a magnetic circuit and generates a variable magnetic field with its strength in the teeth contact zone of the hardened gear wheels being equal to 1×10⁵-1×10⁶ A/m and the frequency of its oscillations being equal to 20-70 Hz.

EFFECT: increased reliability of gear wheels and extended service life.

2 cl, 4 dwg