Method for detecting and identifying defects in a laser beam weld seam
US6937329B2 · kind B2 · utility
86Cited by
10References
55Claims
0Family size
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Key dates
| Filing date | Jul 5, 2001 |
| Grant date | Aug 30, 2005 |
| Priority date | — |
| Expiry date | Aug 27, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23K31/125
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A method for detection and identification of defects in a weld seam created using a laser beam.According to this method, at least two measurement signals are acquired in real time delivered by optical sensors (C1 to C6) detecting variations in luminous intensity of the plasma formed by the laser beam (14). These signals are then combined by applying a mathematical operation. The combined signal obtained is then compared to a predetermined threshold. Depending on the result of this comparison, a determination is made of the presence or absence of a defect corresponding to the operator used.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.