| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a method for punching an iron core piece having a shape and a size reduced in twist of a bridge, and good characteristics for motor, and to provide a laminated iron core obtained by laminating the iron core pieces.SOLUTION: A method for punching an iron core piece 11 having bridges 13 each between a radial outside edge 12a of a magnet insertion hole 10 and an outside region 12 of the iron core piece 11, includes: a process of punching the magnet insertion holes 10; and a process of forming through holes 22 each forming a radial outside contour 13d of the bridge 13; and a process of punching outlines of the iron core piece 11 excluding the radial outside contours 13d of the bridges 13.</p> |
