Handling of serial products for the magnetic particle crack detection

In the automobile and their supplier industry, high quantities of uniform workpieces have to be inspected, partially piece for piece, under a high cost pressure. The cost pressure has not only influence on the used testing technique, but also on the required throughput-rate. In non-destructive testing, crack detection plays an important role. For testing high quantities of specimens with simple geometry like rods, tubes or bolts, the ultrasound- or eddy current technique are preferably used. However for ferromagnetic specimens with complicated geometry, magnetic particle inspection (MPI), is the most suitable technique. Based on practical examples, several MPI techniques with various handling procedures are shown in order to minimise the testing cycle.