Post-cast EDM method for reducing the thickness of a turbine nozzle wall

Patent · Tue Jan 01 00:00:00 EST 2002

OSTI ID:874435

Jones, Raymond Joseph ^[1]; Bojappa, Parvangada Ganapathy ^[2]; Kirkpatrick, Francis Lawrence ^[3]; Schotsch, Margaret Jones ^[4]; Rajan, Rajiv ^[5]; Wei, Bin ^[6]

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1. Duanesburg, NY
2. Schenectady, NY
3. Galway, NY
4. Clifton Park, NY
5. Guilderland, NY
6. Mechanicville, NY

A post-cast EDM process is used to remove material from the interior surface of a nozzle vane cavity of a turbine. A thin electrode is passed through the cavity between opposite ends of the nozzle vane and displaced along the interior nozzle wall to remove the material along a predetermined path, thus reducing the thickness of the wall between the cavity and the external surface of the nozzle. In another form, an EDM process employing a profile as an electrode is disposed in the cavity and advanced against the wall to remove material from the wall until the final wall thickness is achieved, with the interior wall surface being complementary to the profile surface.

• Research Organization: General Electric Co., Schenectady, NY (United States)
• DOE Contract Number: FC21-95MC31176
• Assignee: General Electric Company (Schenectady, NY)
• Patent Number(s): US 6388223
• OSTI ID: 874435
• Country of Publication: United States
• Language: English

Related Subjects

post-cast
edm
method
reducing
thickness
turbine
nozzle
wall
process
remove
material
interior
surface
vane
cavity
electrode
passed
opposite
displaced
predetermined
path
external
form
employing
profile
disposed
advanced
final
achieved
complementary
interior surface
external surface
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