Our machine vision cameras inspect laser braze welds for porosities, gaps and skips. Not only can we see defects as small as 0.2 mm, we detect them despite background noise (burn marks, discolouration) which are notorious for interfering with weld vision inspection systems.
These vision systems use anywhere from 12-50 high resolution cameras. We have developed customized software that differentiates between the background noise and the weld defects. This combination of hardware and software provides a consistent, reliable and accurate inspection. Communication is established with the PLC or the factory network directly to provide maximum process control and part traceability.
Problem: Our client (a large automotive OEM) uses a laser brazing system as a means of producing a clean finished joint on their car hoods and roofs. As part of the manufacturing process the quality of the laser braze requires vision inspection. Our client requested an automated machine vision system for the inspection of the laser braze quality on the vehicle.
Solution: This system uses multiple high resolution cameras and lights mounted above the vehicles. When the vehicle is in the inspection station the cameras inspects and detects defects on the laser braze on both side of the roof of the vehicle. The machine vision system detects defects both in (diameter larger than 0.5mm and break of braze line) and out of area braze defect.
The automaker's PLC based production system sends vehicle information to the machine vision system (style, roof option, barcode) and based on the received information, the vision inspection system selects the correct inspection recipe and performs the appropriate inspection. Inspection results (including zone number where defects are found) are sent back to the automaker's production system for further tracking.