| 摘要 |
The apparatus comprises an assembly mandrel formed (15) of two cylindrical components (16, 17) displaceable one relative to the other and operable to rotate about a common axis, and a pair of circular plates (18, 19) slidably mounted on the ends of the assembly mandrel. The assembly mandrel carries seats adapted for supporting and holding in position the end rings and the central disk. The cylindrical components of the assembly mandrel are provided with retaining means (20), arranged on the lateral surface thereof, for temporary holding in position the blades of the fan wheel. Rolling (25) and flanging (26) devices are mounted near the seats of the end rings and of the central disk on the assembly mandrel. The cylindrical components of the assembly mandrel are axially displaceable one relative to the other between a spaced apart position for mounting the end rings and the central disk and an approached position for carrying out the rolling and flanging operations of the end rings and the central disk onto the blade ends. |
