Metal working – Method of mechanical manufacture – Impeller making
Reexamination Certificate
2011-08-30
2011-08-30
Chang, Rick K (Department: 3726)
Metal working
Method of mechanical manufacture
Impeller making
C029S889000
Reexamination Certificate
active
08006381
ABSTRACT:
A method of modifying an existing casting mold for a turbine moving blade having a shroud band segment with an initial coupling geometry for coupling with a further shroud band segment, the coupling geometry having an initial coupling angle of the shroud band segment relative to a circumferential direction of the turbine, includes calculating a modified coupling geometry for the shroud band segment, the modified coupling geometry including a modified coupling angle of the shroud band segment relative to the circumferential direction. The method further includes creating at least one of a removal zone and an application zone, wherein the creating of the removal zone includes removing a first amount of casting mold material from the removal zone and wherein the creating of the application zone includes applying a second amount of an additional casting mold material to the application zone, wherein the removing and the applying steps result in the casting mold having the modified coupling angle.
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Haehnle Hartmut
Nagler Christoph
Schwarz Ingo
Alstom Technology Ltd
Chang Rick K
Leydig , Voit & Mayer, Ltd.
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