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概要

We are developing the laser welding and cladding device for the maintenance of heat exchanger pipes. In the We are developing the laser welding and cladding device for the maintenance of heat exchan ger pipes. In the case of flow accelerated corrosion where pipe wall thinning occurred after a long time operation, laser cladding is mostly expected. A laser processing head was proposed in order t o access the pipe wall. A composite-type optical fiber scope was used for real time observation and laser processing. An air-cooled compact fiber laser was used for spot heating. We present the conc ept of the laser cladding device which have the following features: 1) Wire feeing modules 2) Module capable of laser irradiation in the vertical heat exchanger pipe 3) Assist gas injection module.

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