INDUCTION HEATING DEVICE AND INDUCTION HEATING METHOD

PROBLEM TO BE SOLVED: To provide an induction heating device and an induction heating method that can easily make the temperature distribution of a whole heated surface even by flattening the central portion of a temperature distribution profile vertical to a travel direction.SOLUTION: An induction heating device heats a heating object 1 by moving, without contact, the heating object 1 including a heated surface 1u relative to an induction heating coil 2 including a heating surface smaller than the heated surface 1u and having a hole 2a formed at a central portion. The induction heating device controls heating of the heating object 1 using a travel path RT1, i.e. a first travel path of the induction heating coil 2 and a travel path RT2, i.e. a second travel path of the induction heating coil 2 shifted by a prescribed distance Δd in a direction vertical to the travel path RT1 as one combination travel path. The prescribed distance Δd is a value obtained by adding or subtracting an allowable distance to/from half of a hole diameter d of the induction heating coil 2.SELECTED DRAWING: Figure 2 【課題】移動方向に垂直な温度分布プロファイルの中央部分を平坦化して被加熱面全体の温度分布の均一化を容易に行うことができる誘導加熱装置及び誘導加熱方法を提供すること。【解決手段】被加熱面１ｕを有する加熱対象物１と被加熱面１ｕに比して小さい加熱面を有し、中央部分に穴２ａが形成された誘導加熱コイル２とを非接触で相対的に移動させて加熱対象物１を加熱する誘導加熱装置であって、誘導加熱コイル２の第１の移動経路である移動経路ＲＴ１と、移動経路ＲＴ１に垂直な方向に所定距離Δｄシフトした誘導加熱コイル２の第２の移動経路である移動経路ＲＴ２とを１つの合成移動経路として加熱対象物１を加熱制御する。所定距離Δｄは、誘導加熱コイル２の穴径ｄの１／２に許容距離を増減した値である。【選択図】図２