METHODS OF MANUFACTURING BLADES OF TURBOMACHINES BY WIRE ELECTRIC DISCHARGE MACHINING, BLADES AND TURBOMACHINES
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United States of America Patent
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Sep 24, 2015
app pub date -
Oct 25, 2013
filing date -
Oct 31, 2012
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Abstract
The method is used for manufacturing a blade of a turbomachine comprising an airfoil portion; according thereto at least one external or internal surface of the airfoil portion is obtained by wire electric discharge machining; this is allowed by designing these surfaces as “ruled surfaces” or very close to such kind of surfaces; this method is particularly effective, for forming internal cavities of hollow stator blades of steam turbines; this method allows to manufacture in a single piece hollow blades having root portions and shroud portions. Blade of a turbomachine with an internal cavity wherein the surface of the airfoil of the blade inside the cavity defines grooves perpendicular to the axis of the turbomachine.
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