US 2010/0072192 A1Published application

Induction heating apparatus

AssigneeNippon Steel & Sumitomo Metal Corporation

InventorYoshiaki Hirota

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Abstract

An induction heating apparatus for controlling the temperature distribution for heating a metal plate irrespective if it has a small thickness, is magnetic or nonmagnetic, and capable of coping with a change in the width of the plate, or meandering of the plate. The apparatus heats a metal plate 1 by induction heating, which passes through the inside of induction coils 2, wherein in a vertical projected image of the conductors on the metal plate 1, the conductors 2a and 2b, parts of the induction coil, placed on the front surface side and the back surface side of the metal plate 1, the conductors 2a and 2b on the front surface side and the back surface side are arranged so as to be deviated from each other in the lengthwise direction of the metal plate 1, the edge portion of at least either the conductor 2a on the front surface side of the metal plate 1 or the conductor 2b on the back surface side thereof is arranged aslant or arcuately, and magnetic cores 10 are arranged at the outer sides of the induction coils 2.

Claims7

Dependent claims

An induction heating apparatus for heating a metal plate that travels through the inside of an encircling induction coil, wherein in a vertical projected image of the conductors on the metal plate, the conductors, parts of the induction coil, placed on the front surface side and the back surface side of the metal plate, the conductors on the front surface side and the back surface side are arranged so as to not overlap each other in the lengthwise direction of the metal plate in the central portion of the metal plate in the widthwise direction thereof;

the conductor of at least either the front surface side or the back surface side is arranged so as to be slanted relative to the widthwise direction of the metal plate, or the conductors on the front surface side and the back surface side are so arranged as to be at least partly overlapped in the vertically projected images in the lengthwise direction of the metal plate at least at either edge portion of the metal plate in the widthwise direction thereof;
and
a magnetic core is arranged from the front surface side over to the back surface side of the metal plate bestriding the edge portion of the metal plate, on the outer side of the conductor that is arranged so as to be slanted, or on the outer sides of a portion of the conductor that is connecting the central portion of the conductor with the edge portion of the conductor that is so arranged as to be at least partly overlapped each other in the vertically projected images.

Dependencies are inferred from the claim text.