A prototype of maintenance machine for heat exchanger tubes was developed. It was based on the bench top size device which had been specially designed to have dual functions for fiber inspection and laser cladding in JAEA. A laser processing head was improved mechanically in 2 motions of axial translation and circumferential rotation to insert the heat exchanger tubes. ...
英字タイトル:
Development of Maintenance Machine for Heat Exchanger Tubes by Laser Technology

New maintenance technique was proposed using a hand-held laser torch for aging chemical plants and power plants. The hand-held laser torch was specially designed to be able to access limited tubular space in various cases. A composite-type optical fiberscope was composed of a center fiber for beam delivery and surrounded fibers for visible image delivery. Laser irradiation on a work pieces with the best accuracy of filler wire was carried out. And, we found that the optimized wire-feed speed was 2 mm/...
英字タイトル:
A Study of Cladding Technology on Tube Wall Surface by a Hand-held Laser Torch

We are developing the inspection technology for laser micro spot welding. Butt welding for the inner wall of heat exchanger tubes were successfully carried o ut by a composite-type optical fiber scope. The related technologies are the f ollowing : Rapid inspection by Eddy Current Testing Fiber endoscope observation 3 Synchrotron X-ray absorption contrast method. These technologies are versatile to be applied in maintenance for industrial production plants....
英字タイトル:
Development of Inspection Technology for Laser Welding Section

Laser thermal processing was applied to robotic systems. For the narrow limited space like a 1-inch diameter tube, a compact laser processing head successfully observed the heat exchanger tube inner wall and welded a crack gap. A compact air cooled fiber laser was able to heat an inner wall through a delivery optical fiber. A filler wire feeder for laser cladding was also tested. A compact maintenance robot for petrochemical industrial plants was demonstrated....
英字タイトル:
Development and Deployment of Maintenance Robot with Laser Thermal Processing

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 process...
英字タイトル:
Development of Laser Cladding Technology for Maintenance ofPipe Wall Thinning