Assessment of Laser-Cut Quality on the Basis of Acoustic Emission Signals Captured with a PZT Sensor
The paper describes an analysis of the AE signals captured with PZT sensor during and after laser cutting. In the course of cutting the continuous AE signals are treated in a defined time interval. After cutting, bursts of acoustic emission will occur. They are due to solidification of the molten material and cooling of the laser-cut surface. The results shown refer to cutting of steel plate DC04 and of austenitic stainless steel plate X5CrNi18-10. Both plate types are frequently used in automobile industry, where, because of mass production, optimisation of the cutting process is desired. Numerous laser-cutting conditions assuring different quality levels of the cut made were chosen. It was proved that the laser cutting conditions had a significant influence on the amplitude value and intensity of the continuous signal and AE activity after the termination of laser cutting. Separately it was also confirmed that there was a relation between the measured signal and laser-cut quality, which is shown, to a large extent, by the presence of dross at the lower edge of the cut.
P.J. Szabó, T. Réti, T. Czigány
J. Grum and T. Kek, "Assessment of Laser-Cut Quality on the Basis of Acoustic Emission Signals Captured with a PZT Sensor", Materials Science Forum, Vol. 589, pp. 215-220, 2008