Method of manufacturing by electric discharge machining an impeller for centrifugal rotating machine
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United States of America Patent
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Nov 12, 2013
Grant Date -
May 12, 2011
app pub date -
Oct 6, 2009
filing date -
Oct 6, 2008
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Abstract
A method for manufacturing an impeller of a centrifugal rotating machine that is approximately disk-shaped and in which flow passages are formed between a plurality of blades and disposed in a radial manner from the inner circumferential side to the outer circumferential side, provided with a first flow passage formation step that forms a first region on the outer circumferential side within the flow passage by inserting an electrode of a shape fitting to the flow passage with the electric discharge machining method from the outer circumferential side of the disk-shaped body having an outer shape of an impeller, and a second flow passage formation step that forms a second region on the inner circumferential side within the flow passage from the inner circumferential side of the disk-shaped body.
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