Real time estimation of CO2 laser weld quality for automotive industry
✍ Scribed by Young Whan Park; Hyunsung Park; Sehun Rhee; Munjin Kang
- Publisher
- Elsevier Science
- Year
- 2002
- Tongue
- English
- Weight
- 492 KB
- Volume
- 34
- Category
- Article
- ISSN
- 0030-3992
No coin nor oath required. For personal study only.
✦ Synopsis
Laser welding is one of the most precise welding processes in joining sheet metals. In laser welding, performing real time evaluation of the welding quality is very important to enhance the e ciency of the welding process. In this study, the plasma and spatter, which are generated during laser welding, are measured using UV and IR photodiodes. The factors that in uence weld quality are classiÿed into ÿve categories; optimal heat input, slightly low heat input, low heat input, partial joining due to gap mismatch, and nozzle deviation. The data number deviated from reference signals and their standard deviations were also considered to evaluate the qualities. A system was also formulated to perform real time evaluations of the weld quality using a fuzzy multi-feature pattern recognition with the measured signals.