| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for manufacturing blades capable of working the blades of various dimensions without changing the dimensions of metal molds. SOLUTION: A first pressing process of forming an intermediate member 53 by forming a rectilinear bent section 24 at a tabular sheet metal member is performed. Further, a second pressing process of forming a curved section at the intermediate member 53 by placing the intermediate member 53 on the lower metal mold 48 formed with the curved concave surface 44 in such a manner that the bent section 24 projects by the prescribed length from a top end P of a metal mold recessed part 48 and pressing the intermediate member 53 by the upper metal mold 52 formed with the curved convex surface 50 is performed. In the second pressing process, the side length of the intermediate member portion 53K to be press worked can be freely changed. Accordingly, there is no need for preparing the metal mold by each of the side lengths of the intermediate member portions 53 curved by press working. As a result, the cost required for the metal mold can be markedly reduced and the installation space for the metal mold can be remarkably reduced. COPYRIGHT: (C)2006,JPO&NCIPI
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