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The paper presents results of an analysis of acoustic emission (AE) measurement in laser cutting of a DC04 steel plate. Laser cutting was evaluated on the basis of monitoring the acoustic emission in the course of cutting and of an analysis of events occurring in the material after the completion of laser cutting. It was found that the cutting oxygen flow(More)
This paper presents an improved monitoring system for the failure detection of engraving tool steel inserts during the injection molding cycle. This system uses acoustic emission PZT sensors mounted through acoustic waveguides on the engraving insert. We were thus able to clearly distinguish the defect through measured AE signals. Two engraving tool steel(More)
The paper treats the results obtained in simultaneous measurements of acoustic emission with PZT AE sensors and of deformations with resistance measuring rosettes carried out during and immediately after laser cutting-out of a deep-drawn sheet product, i.e. mudguard. The presence of a field of residual stresses produced by deep-drawing is characteristic of(More)
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