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Detection of Process Failures in Layerwise Laser Melting with Optical Process Monitoring

2012; Elsevier BV; Volume: 39; Linguagem: Inglês

10.1016/j.phpro.2012.10.097

1875-3892

Tom Craeghs, Stijn Clijsters, Jean Pierre Kruth, Florian Bechmann, Marie.-Christin Ebert,

Additive Manufacturing and 3D Printing Technologies

Layerwise Laser Melting (LLM) is an Additive Manufacturing process which allows producing complex metallic parts by building parts layer by layer. Monitoring and control of the melting process is needed for further development of the process and future adoption of the process by industry since it allows to monitor the quality of the building process during the actual build job. Furthermore, melt pool monitoring enables a better and more fundamental understanding of the thermal behavior of the process. This paper describes a system for monitoring of the melt pool during LLM and a data processing algorithm to map the measured melt pool data in space. With this so called mapping approach the data interpretation can be significantly reduced. It will be shown that with this system a wide range of process failures can be detected during the process.