Inspection and laser cladding technologies in limited tubular space by a composite-type optical fiber system

複合型光ファイバシステムを用いた狭隘空間での検査及びレーザー肉盛り技術開発

寺田 隆哉; 伊東 富由美; 西村 昭彦  

Terada, Takaya; Ito, Fuyumi; Nishimura, Akihiko

We developed two brand new devices. One is an inspection machine with surface cleaning and LIBS by a nanosecond pulsed Nd:YAG laser. Another is a cladding machine for heat exchanger tubes by a CW Yb-doped fiber laser. In both cases, a composite-type optical fiber system successfully delivered the laser beams to limited tubular space. The pulsed laser beam repetitively ablated the oxide layer and atomic emission lines were analyzed by a spectrometer simultaneously. The CW fiber laser cladding with wire feeding was performed to fill up the inner wall wastage. We are proposing to apply our technologies to plant maintenance.