Method and device for inductive surface hardening of crankshaft journals and pins.

摘要

The invention relates to a method and a device for inductive surface hardening of crankshaft journals and pins. The journal or pin to be hardened is in each case moved past two universal small-area inductors (24, 25) while being rotated at high speed and is heated approximately simultaneously and uniformly in the entire surface region to be hardened. The small-area inductors (24, 25) are adjusted radially, without being supported relative to the journal or pin, by a respective separate mechanical program-controllable positive guidance of the circumferential surface of the journal or pin while maintaining a locally individually specified coupling distance. By locally selective variation of the coupling distance, the energy supply to the surface of the journal or pin is controlled in such a way that a non-uniform mass-related heat dissipation is just compensated and, as a result, the journal or pin is heated uniformly over the entire circumference.