| 摘要 |
PURPOSE:To make machining easy, and improve the degree of precision, by performing previously embossing on a part necessary for machining, welding this part by a thermal means such a laser welding after laminating, and performing machining of the welded part. CONSTITUTION:When holes 5A-5F and adsorption surfaces 6A and 6B are formed by a machining after laminating magnetic plates, the following processes are employed. In the case of making holes such as holes 5A-5F parallel to the lamination surface of magnetic plates, embossing is previously given on a part for making holes, and this lamination part is welded by a thermal means such as laser welding. After that, this welded part is subjected to a process for making holes. In the case of finishing the absorption surfaces 6A and 6B, too, after the magnetic plates are laminated, this part is welded by a thermal means such as laser welding, and then a working for mirror surface is performed on the welded part. Thereby, easy machining with a high degree of precision is enabled.
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