Electromagnetic induction heating apparatus and light alloy wheel manufacturing method

A light alloy wheel manufacturing method comprising a heating step of heating a half-finished light alloy wheel through electromagnetic induction, wherein in the heating step, the half-finished light alloy wheel is heated by an induced current generated when the rotating body of the electromagnetic induction heating apparatus, the electromagnetic induction heating apparatus comprising:

• a rotating body with a plurality of magnets arranged such that the same pole is positioned on a side of the half-finished light alloy wheel to be heated;
• a rotation driving means for rotating the rotating body;
• a temperature sensor for measuring a temperature of the half-finished light alloy wheel to be heated;
• and
• a moving means for moving at least one of the rotating body and the half-finished light alloy wheel to be heated to change a distance between the rotating body and the half-finished light alloy wheel to be heated, wherein
• the rotating body is arranged with the plurality of magnets, wherein
• the temperature sensor measures first temperature of the half-finished light alloy wheel on a side of the rotating body and second temperature of the half-finished light alloy on an opposite side of the rotating body, wherein the moving means changes the distance based on the first temperature and the second temperature, wherein the rotation driving means changes a rotation speed of the rotating body based on the first temperature and the second temperature, and wherein the electromagnetic induction hearting apparatus is rotated below the half-finished light alloy wheel.