In-Situ Monitoring Detects Melt Pool Defects

Concept Laser’s QMmeltpool 3D now provides position-related monitoring and 3D visualization of the company’s LaserCusing additive manufacturing method in real time.

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Concept Laser’s QMmeltpool 3D now provides position-related monitoring and 3D visualization of the company’s LaserCusing additive manufacturing method in real time. The system builds on the company’s previous time-related 2D monitoring capability by adding position-related signals that make it possible to generate 3D datasets of a component and obtain information about defects during the build process. The monitoring advancements will be available on the M1 and M2 cusing machines beginning in 2016.

The system uses coaxial sensors to detect melt pool emissions created during the fusing process in the form of infrared radiation. The coaxial structure enables monitoring to be restricted to a small region of interest, with a high local resolution and rapid scanning rates ranging to 50 kHz depending on the detector type. The system monitors the melt pool area and intensity, parameters which can be allocated to corresponding process errors such as inadequate laser output or excessively high scanning speed.