METHOD OF MANUFACTURING VARIABLE VANE

摘要

The present invention provides a variable vane manufacturing method capable of setting the dimensions of a shaft unit and a blade unit with desired dimensional precisions without any machining. A sinter is prepared such that the height of a blade unit 2 ranges within +0.3% to +0.9%, the thickness of the blade unit 2 ranges within - 0.6% to -0.0%, the diameter of a shaft unit 3 ranges within +0.3% to +0.9%, the length from the lower end of the blade unit 2 to the lower end of the shaft unit 3 ranges within - 0-6% to -0.0% with respect to the target dimensions of a final product, and a sintering density is 95% or more of a relative density. The height and thickness of the blade unit 2 in the sinter are set to desired product dimensions in a first pressing process at the same time; the coaxiality between the blade unit 2 and the shaft unit 3 is set to a desired product dimension in a second pressing process; and the roundness of the shaft unit 3 is set to a desired product dimension in a third pressing process.