Wound Iron Core, Manufacturing Method For Wound Iron Core, And Wound Iron Core Manufacturing Device

Abstract: This wound iron core (10) having a wound shape has a rectangle hollow part (15) at the center thereof, and includes a portion in which grain-oriented electromagnetic steel sheets (1), each of which is obtained by alternately providing flat parts (4) and bent parts (5) in the longitudinal direction, are laminated in the plate thickness direction. The wound iron core is formed by lamination of the grain-oriented electromagnetic steel sheets (1), which are individually folded and bent, in the form of a layer so as to be assembled into a wound shape. The wound iron core is formed such that, for one winding, a plurality of grain-oriented electromagnetic steel sheets are mutually connected through at least one joining part (6). The bent parts (5) of the laminated grain-oriented electromagnetic steel sheets (1) are characterized by having an average Vickers hardness of 190-250 HV in the L cross section, which is a cross section along the thickness direction of the grain-oriented electromagnetic steel sheets (1) and which is parallel to the longitudinal direction.

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