B - Operations – Transporting – 23 – C
Patent
B - Operations, Transporting
23
C
B23C 3/34 (2006.01) B23C 3/04 (2006.01) B23P 15/00 (2006.01) B23Q 35/00 (2006.01) F01D 5/08 (2006.01)
Patent
CA 2685632
The invention refers to a method for machining a gas turbine rotor (10) which is provided with a cooling air slot (19, 19') which concentrically extends around the axis (18) of the gas turbine rotor (10) and is supplied with compressed cooling air via axial cooling air holes (14) which at the side lead into the slot base (16) of the cooling air slot (19, 19'), and the opening of which is covered by bridges which are arranged in a distributed manner over the circumference and spaced apart from each other by means of gaps. A crack-resistant slot shape is achieved without intervention into the configuration of the bridges by a material-removing tool (22), especially a milling tool, being lowered in the gaps between the bridges one after the other into the cooling air slot (19, 19') and in this way the slot base (16) of the cooling air slot (19, 19') being machined and widened over the entire circumference.
Geissel Uwe
Gnirss Gunter
Meixner Bernd
Schwaar Michael
Storch Wilfried
Alstom Technology Ltd
Norton Rose Or S.e.n.c.r.l. S.r.l./llp
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