| 摘要 |
PROBLEM TO BE SOLVED: To make the efficient manufacture of a hollow blade achievable by pouring a pressurizing gas into a connecting hole between two cavities as locally heating a blade area made in an intermediate plate of a blade, forming a gas supply line in this blade area, and separating the area of a blade part covered with coating. SOLUTION: A hollow blade 1 at an intermediate stage of manufacture of the blade or the like of a blower for a turbofan engine are made up of an underside skin 2, a topside skin 3 and a center plate 4 for forming a blade's reinforcer, and this hollow blade is installed on a supporting body being supported by a movable table 96. Then, an area 90 of the center plate 4 including a hole 5 connecting two cavities to be formed in space between both the connected areas of the blade 1, is installed in an interval between two tool jaws 97 and 97 inclusive of two heating elements 103, and the said area 90 is heated on the basis of the output of a temperature sensor. Subsequently, high pressure gas is sprayed by way of a supply passage at a time when it is heated to the specified temperature, whereby both these skins 2 and 3 are deformed to some extent, and thus such a hollow blade that formed a permanent pipe in space between a pair of gas supply pipes is completed. |
