The Laser Welding inline quality assessment system based in infrared imaging technology (i3LasWeld-QA) has been developed as a key enabling technology for different industries with an aim of a zero-defect manufacturing and process optimization.
The system is a real-time defect detection system, integrated in the production line, for laser welding processes based in the use of uncooled infrared imaging sensors working in the MWIR range, capable to operate at frame rates up to 1 kHz.
The sensor is coupled directly to the welding head allowing an on-axis stand-off observation of the process area. Melt pool images are acquired during the laser welding process and analysed on-line in order to assess in real-time the quality of the process. The recorded data is available for offline analysis.
Suitable for CO2, Nd:YAG, diode and Yb:YAG laser sources.
|Optical sensor||Uncooled infrared imaging module
TACHYON 1024 microCORE
|Infrared band of detection||MWIR (1 - 5 microns)|
|Image resolution||32x32 (pixel size: 135 um x 135 um)|
|Frame rate||1,000 images per second|
|Communication||USB 2.0 High-speed (480 Mbps)
M12 Mini-B USB connector with locking mechanism
(IP67 for water and dust protection)
|Power||5 VDC, 500 mA (over USB interface)|
|Enclosure||Ruggedized IP67 compact mechanical enclosure|
|Dimensions (mm)||46 x 39 x 29|
|Processing unit||Industrial PC, with the following
configuration: Intel Dual Core i5
processor @ 2 GHz and 4 GB of RAM
|Defects||Holes, pores, lack of penetration,
falsefriend, lack of fusion, underfilling
Screenshots of the i3LasWeld-QA software.
Above: Acquisition window where the quality assessment of the laser weld is performed in realtime.
Below: Analysis window with a visible image of the weld and the overlayed defect areas.
- Optical coupling on to standard laser welding heads
- Inline quality assessment of the process
- Real-time analysis and defect detection
- Defects: holes, pores, lack of penetration, false friend, lack of fusion, underfilling
- Welding configurations: overlap joint, butt weld, fillet weld
- False friends
- Lack of penetration / lack of fusion
- Cracks, pores