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US 2007/0181550 A1Published application
A-TIG welding of copper alloys for generator components
AssigneeSiemens Power Generation, Inc.
InventorsDavid S. Segletes, Dennis R. Amos
Life of this patent
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Abstract
The present invention provides for the welding of copper using activated TIG welding (8). In particular, the copper coils (6) of electrical generators (2) are welded using the present invention.
Claims14
A method of welding unbeveled copper comprising:
- placing an activated flux on the desired site of a copper weld;
- and
- welding the copper using TIG without a filler material;
- wherein the activated flux comprises 20-50% by weight of at least one of SiO2, TiO2, Cr2O3 and a halide.
1 more element
A copper weld produced by:
- applying an activated flux on the weld site;
- and
- welding the copper with a TIG welding process;
- wherein the depth of the weld is at least 5 mm;
- whereby the copper is not preheated prior to welding.
2 more elements
A method of welding copper coils comprising:
- applying an activated flux to abutted ends of copper coils, wherein said abutted copper coils are between 0.0-2.0 mm apart;
- and
- welding said copper coils at approximately 220 amps, and 9-11 volts, and a speed of approximately 7.5-9.0 cm/min, wherein the welding is preformed without preheating said copper coils and without a filler material;
- wherein said copper coils are unbeveled;
- wherein no filler material is used in the welding;
- wherein said copper coils are at least 95% copper.
3 more elements
Dependencies are inferred from the claim text.