TOOL FOR SURFACE FINISHING AND HARDENING Russian patent published in 1997 - IPC

FIELD: plastic metal working, surface hardening. SUBSTANCE: tool includes body of non-magnetic material, jaws defining annular chamber for arranging deforming members. Unit for speeding up deforming members is in the form of rotor made of non-magnetic material and mounted with possibility of rotation and magnetic field source. Tool also has sliding bearing embracing body; unit for rotating jaws with system for automatic speed control unit for rotating jaws is in the form of electric motor whose shaft supports cone-like brace. Ends of said brace are secured to one jaw. Automatic speed control system is in the form of pickup of circumferential velocity of deforming members. Output of said pickup is connected with one input of comparator. Second input of comparator is connected with speed setter of deforming members. Output of comparator through amplifier is connected with actuator controlling revolution number of jaws. EFFECT: improved design. 1 dwg