Patent ID: 9012819
Filing Date: 2015-04-21
Classification: C21D,F16C,H05B,Y02P

Abstract:
1. A method of heating an assembled rolling bearing using an induction heater, the method comprising the steps of: providing the assembled rolling bearing; heating the assembled rolling bearing using a heating cycle; using a first portion of the heating cycle to rapidly raise the temperature of the assembled rolling bearing wherein an inner ring of the assembled rolling bearing heats up at a higher rate than an outer ring of the assembled rolling bearing; triggering a change over from the first portion of the heating cycle to a second portion of the heating cycle based on a trigger selected from at least one of (i) elapsed time and (ii) an indication of the temperature difference between inner and outer rings of the rolling bearing; using the second portion of the heating cycle to raise the temperature of the assembled rolling bearing such that the inner ring of the assembled rolling bearing heats up at a rate lower than that during the first portion of the heating cycle, triggering a change over from the second portion of the heating cycle to a third portion of a heating cycle based on a trigger selected from (i) elapsed time and (ii) an indication of the temperature difference between the inner and outer rings of the assembled rolling bearing; using the third portion of the heating cycle to raise the temperature of the assembled rolling bearing such that the inner ring of the assembled rolling bearing heats up at a rate higher than that during the second portion of the heating cycle.