Development of Multifunction Laser Welding Head (3) - Surface Inspection Technique by Laser-ultrasonics -
三浦 崇広 Takahiro MIURA 河野 渉 Wataru KONO 千田 格 Itaru CHIDA 吉田 昌弘 Masahiro YOSHIDA 山本 智 Satoshi YAMAMOTO 依田 正樹 Masaki YODA 落合 誠 Makoto OCHIAI
Laser-ultrasonicsPenetrant TestingPreventive maintenanceSAFTWeld Defect
Multifunction laser welding head has been developed. The head is able to perform not only underwater laser welding as repair, but also laser peening as preventive maintenance and laser ultrasonic test ing as inspection. For inspection with multifunction laser welding head, a new method of visualized weld defects in water by laser-ultrasonics has developed. To detect and visualize a surface of weld metal with welding bead, the authors have developed a new detection method by leaky wave induced by interaction with surface acoustic waves and defects. Furthermore, developing Synthetic Aperture Focu s Technique (SAFT) for visualized inspection surface 2-dementionally, we achieve the inspection result alike Penetrant Testing (PT) despite underwater environment with multifunction laser welding head.