Fans and turbines

Details Fans and turbines Fans and turbines

B - Operations, Transporting

23

H

B23H 9/10 (2006.01)

Patent

CA 2520173

Overlapping twisted radial aerofoil blades or vanes (70) are formed on a compressor rotor or turbine disk or the like (68) by electro-discharge machining with a curved round section wire tool electrode (72) which is turned by a tool holder (28) as it is advanced on a helical path to form the inner surface of each blade or vane with the outer curve of the wire, or the outer surface of each blade or vane with the inner curve of the wire, the disk being indexed to a next rotary position after each blade surface is machined.

L'invention concerne des aubes ou des pales (70) profilées radiales en spirale et se chevauchant, formées sur un rotor de compresseur ou un disque de turbine ou analogue (68) par usinage par étincelage à l'aide d'une électrode (72) d'outil à fil incurvé de section ronde mise en rotation par un porte-outil (28) à mesure que celui-ci avance sur un chemin hélicoïdal afin de former la surface intérieure de chaque aube ou pale à l'aide de l'incurvation extérieure du fil, ou la surface extérieure de chaque aube ou pale à l'aide de l'incurvation intérieure du fil, le disque étant indexé sur une position rotative suivante après chaque usinage de surface d'aube.

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