| 摘要 |
PURPOSE:To improve the quality of a repair part and enable the build-up in a proper shape by fitting several copper strap jig conformed to the unevenness of a blade root part stepwisely in order to the uneven part of a repairing blade root part and repairing the blade root part with its restoration by TIG welding. CONSTITUTION:In case of performing a build-up repair with a flat welding by an automatic TIG welding on the blade part 2 of a turbine blade, etc., the projecting part 1A of the 1st step of the blade root part is subjected to a build-up by using a set of copper strop 3, 4. A recessed part 1B is then build-up on the projecting part 1A by adjusting the copper patch 7 of the succeeding step to the proper position. The remaining uneven parts 1C, 1D, 1E are subjected to a build-up by using strap 8 stepwisely in order. The copper straps 3-8 can easily be removed even after welding in case of performing the build-up welding due to being the pure copper of good heat conduction. In this way, the automa tion of the repair welding of the blade root is enabled and the quality of the repairing part is improved.
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