Method of making rotor blades of radial-axial hydraulic...

Details Method of making rotor blades of radial-axial hydraulic... Method of making rotor blades of radial-axial hydraulic...

B - Operations, Transporting

23

P

26/150

B23P 15/04 (2006.01) B21K 3/04 (2006.01)

Patent

CA 1083794

ABSTRACT OF THE DISCLOSURE The present invention provides a method of making rotor blades of radial-axial hydraulic machines, in which first a plain blank of the blade to be manufactured is obtained by welding together at least two sheet pieces that compose the blank in the direction of preferable varying the cross-sectional thickness thereof. The thickness of each of said sheet pieces is adopted to be not less than a maximum cross-sectional thickness of the blank at the portion thereof defined by said sheet piece. Then the blank is subject to machining until a required blade contour is obtained, this being followed by bending of the blade blank into a preset blade shape.

285184

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