Product Code: ICAL05_2208

In-Process Monitoring and Adaptive Control in Pulsed YAG Laser Butt Micro-Welding of Titanium
Authors:
Masayuki Kito, JWRI, Osaka University; Ibaraki Osaka Japan
Hiroshi Nakamura, Horikawa Inc.; Sabae Fukui Japan
Seiji Katayama, JWRI, Osaka University; Ibaraki Osaka Japan
Yousuke Kawahito, JWRI, Osaka University; Ibaraki Osaka Japan
Presented at ICALEO 2005

Titanium is used as glasses frames because of its lightweight and good mechanical properties. On the other hand, a fiber laser with high beam quality is a promising heat source to produce a sound weld of satisfactory depth with good surface appearances, narrow heat-affect zones and high strength. Therefore, a fiber laser was applied to butt-joint welding of Ti sheets for glasses frames. Especially, in order to produce the joint with the minimum HAZ, satisfactory strength and good penetration, the laser peak power was controlled on the basis of the in-process monitoring signals of reflected light and heat radiation during laser welding.