Patent ID: 6498324
Filing Date: 2002-12-24
Classification: B21B,H05B

Abstract:
An induction heating device for selectively heating a rolling roller of a rolling mill by induction heating so as to equalize the diameter of the rolling roller, comprising:an induction heater; an induction heater moving means for moving the induction heater to a heating portion while a distance from the induction heater to a heating surface of a portion to be heated is kept constant; an electric power supply means for supplying electric power to the induction heater; and a heat quantity adjusting means for adjusting a quantity of heat of the induction heater according to a quantity of heat required by the heating portion, the heat quantity adjusting means for adjusting the quantity of heat including a frequency control means for adjustably controlling the frequency of the electric power that is supplied to the induction heater throughout a predetermined frequency range, wherein, when a quantity of heat is required to equalize the diameter of the portion of the rolling roller to be heated, the frequency control means adjusts the frequency of the electric power supplied to the induction heater within a predetermined frequency range that is suitable for supplying the needed quantity of heat through the induction heater into the portion of the rolling roller to be heated.