| 摘要 |
In this method of lengthening the blade aerofoil (5) of turbo machines by building up with weld in the assembled condition of the blades, the position (4) to be welded at the end of the blade aerofoil (5) is encased by a metal mold (1,2). The mold (1,2) has a connection (3) where one pole of the welding circuit is connected. The end (4) of the blade aerofoil is lengthened or repaired by applying runs of weld. The mold (1,2) can be optionally supplemented with heating and/or cooling arrangements and also with a protective gas supply.
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