Optical method of penetration sensing for pulsed Nd:YAG laser welding
| Autor: | David M. Keicher, Marcelino Essien |
|---|---|
| Rok vydání: | 1997 |
| Předmět: |
Materials science
Mathematics::Complex Variables business.industry Laser beam welding Welding Laser Mathematics::Geometric Topology Statistics::Computation Physics::Geophysics law.invention Chemical species Optics law Nondestructive testing High-speed photography Nd:YAG laser Physics::Accelerator Physics business Kovar |
| Zdroj: | SPIE Proceedings. |
| ISSN: | 0277-786X |
| DOI: | 10.1117/12.270012 |
| Popis: | The ability to monitor and control the depth of a laser weld in real-time is critical in many laser welding applications. Consequently, the authors have investigated the use of an optical method to sense weld depth. Welds were generated on kovar samples, using a pulsed Nd:YAG laser. The sensing method uses digital high-speed photography to measure the velocity of the plume of vaporized metal atoms ejected from the metal surface. An energy balance equation is then used to relate the plume velocity to the size of the weld. Numerical solution of the energy balance equation yielded values for weld depth that were within 8% of the actual measured values. |
| Databáze: | OpenAIRE |
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