Magcam MiniCube magnetic field cameras are successfully integrated in crack detection stations of magnet production lines in China

Magcam together with its customer – the European branch of a magnet manufacturer with large production lines in China -have realized a 100% inspection station in the production line of magnets to be used in applications for the European automotive industry.

Because reproducible crack detection on already magnetized parts has never been easy and no supplier could deliver satisfying results, Magcam was asked to develop a new method to get more accurate and reliable results.

Seeing invisible cracks was already possible with the Magcam equipment but defining and automatically detecting these cracks was the new challenge. Magcam therefore searched for possible methods by using its MagFit data analysis module that is has been part of the MagScope Software for many years. Detection criteria were defined together with the customer and new algorithms for custom shaped magnets were developed.

The new method and algorithms were positively audited by the partner’s customer and production volumes increased because of proven reliability and quality.

From the same measurement data more properties can be analyzed, such as magnetic field inhomogeneity, magnetic saturation distribution, Br level and magnetization angle error.

Production data is saved automatically and used for instant pass/fail classification. Moreover, all raw data are saved in a universal csv format.

Conclusion: The Magcam technology can be used to detect cracks quickly and accurately in permanent magnets, magnet assemblies and rotors.