Temperature Monitoring of an SLM Part with Embedded Sensor
Selective Laser Melting (SLM) offers various new possibilities for the production of metallic components with respect to their design and complexity. The manufacturing process in layers enables accessibility and the possibility for manipulation and modification to each section of the part’s geometry. Hence the integration of sensors into the component during its manufacturing process is feasible. This approach is of enormous interest for various industrial sectors since sensor integration is a key enabler of industry 4.0. A sensor that has been embedded into a part during SLM production process facilitates not only a monitoring of this metallic part during its use phase in general but a monitoring of a spatially well-defined location within this part. The work presented in this paper specifically targets the integration of a temperature sensor into an SLM part. The sensor is embedded in a section of the part which is not accessible after the production process any more. Different concepts and strategies of sensor positioning and integration are investigated, focussing on an evaluation of the operating ability of these sensors after their embedding with the SLM process. Thus different methods to attach the sensor to the metallic part are presented. Furthermore the paper reports on the analysis of the influence of geometrical design features on the response behaviour and accuracy of the temperature measurement compared to conventionally conducted reference measurements.
KeywordsSelective Laser Melting (SLM) Industry 4.0 Part monitoring Sensor integration Added value
The authors like to thank the CTI in Switzerland for financing the project.
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