| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for manufacturing capable of enhancing productivity, coping with a variety of impeller shapes, and reducing cost required to manufacture impellers.SOLUTION: A first workpiece (25) for an impeller body (2) having a plurality of vanes (5) arranged radially from the rotation center (8) of a disk (4), and a second workpiece (26) for a cover (3) facing the disk (4) and covering the vanes (5) are formed through casting individually. The first workpiece (25) and the second workpiece (26) are subjected to respective machining process to embody a first product (37) having a shape corresponding to the impeller body (2) and a second product (38) having a shape corresponding to the cover (3). Then the first product (37) and the second product (38) are coupled together. |
