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| Naji, M. |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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Budden, Christian Leslie
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Publications (5/5 displayed)
- 2024Applying systems engineering principles to develop an open source laser based metal powder bed fusion systemcitations
- 2023Preliminary geometric tests of an open-source metal laser powder bed fusion system
- 2023Simple sensor manufacturing by Laser Powder Bed Fusion of conductive polymer blends
- 2022Chamber Heat Calibration by Emissivity Measurements in an Open Source SLS System
- 2022Process optimisation of PA11 in fiber-laser powder-bed fusion through loading of an optical absorber
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document
Chamber Heat Calibration by Emissivity Measurements in an Open Source SLS System
Abstract
The goal of this research is to determine the thermal stability of the powder cake produced during the Selective Laser Sintering process. This will be used for process optimisation and verification on a purpose-built Open Architecture Polymer laser powder-bed fusion (L-PBF) system developed at the Technical University of Denmark (DTU). Furthermore, the emissivity of PA11 powder is determined throughout the heating cycle, studying the true temperature readout by means of an infrared (IR) camera (Camera Model – Optris XI400), which is present for process control during build jobs.<br/><br/>The paper presents two experiments. One is focussing on finding the temperature stable build envelope in the build chamber. This is done by using K-type sensors placed in the powder while heating and cooling the powder cake. And a second experiment is to determine the influence of powder temperature on emissivity, used for non-contact temperature readings done by infrared measurements. This will be used for calibrating the temperature readings with the actual temperature.