Fuji Electric Co., Ltd.

Nippon Steel Sumitomo Metal Corporation

Yasuyuki Ikeda

Kenji Umetsu

Hiroaki Mochinaga

Kazunari Ishizaki

Shigenobu Koga

Takaharu Kataoka

Yasuo Matsunaga

Sakae Okayama

There is provided an induction heating apparatus which continuously heats a steel plate using a solenoid system. The induction heating apparatus () includes: at least three heating coils (A toD) disposed along a longitudinal direction of the steel plate to make the steel plate () pass through an inside thereof; and inductance adjusters (A toD) disposed on electrical pathways () electrically connecting each of the heating coils and a power source applying a voltage to each of the heating coils and capable of generating self-induction and adjusting self-inductance in the self-induction, in which each of the inductance adjusters is disposed to cause a generation of mutual induction at least between the inductance adjusters mutually adjacent to one another.

Induction heating apparatus and induction heating method

In a billet induction heating device, a plurality of heating coil units having round holes different in diameter from one another are arranged in such a manner that the central axial lines of the round holes are in parallel with one another and are in a vertical plane, and moving means supports the heating coil units thus arranged. Whenever a billet is given which is different in size from the one which has been processed, among from the heating coil units one suitable for the given billet is selected, and the moving means is operated to move the heating coil units until the selected heating coil unit reaches the position where it can accommodate the given billet. This arrangement makes it possible to achieve the replacement of the heating coil unit quickly and readily.

Billet induction heating device providing fast heating changeover for

Growing community of inventors

Suzuka, Japan

Yasuyuki Ikeda