Subproject B3 – Research System
Forschungsanlage des Sonderforschungsbereichs 814 – Additive Fertigung
The research systemof the Collaborative Research Centre 814 – Additive Manufacturing is a self-establishedand almost freely parameterizable and temperature-stabilized laser beam meltingsystem.
It allows for ahomogeneous temperature distribution on the building space, which is a basicrequirement for the fabrication process guaranteed by an eight-zone IR surfaceheating system. The maximum build chamber temperature is 230°C, which enablesthe processing of plastics with higher melting temperatures. The scanningsystem is state of the art and guarantees short acceleration times as well ashigh precision in beam guiding. The integrated f-theta lens of the laser systemenables constant intensity distributions almost over the entire build chambersurface of 350 x 350 mm2. The maximum build height is 500 mm. Thefocus diameter of the CO2 laser is 400 µm and the maximum nominalpower is 50 W.
The researchsystem has a wide range of additional equipment, which is used especially forprocess analysis and processing of new powder materials in small quantities. Thus,different setups can be integrated into the system, which make it possible toreduce the installation space and to control the temperature. In addition, areduction of the powder storage container is available, too. Differentrecoating geometries are available for powder application, e.g. different bladegeometries or a counter rotating roller. Furthermore, for the observation ofthe thermal boundary conditions and the exposure process as well as the meltpool formation an infrared camera system can be integrated into the researchsystem.
This high-endadaptable research system is used to answer the most complex questionsregarding laser sintering of polymers.
Modell: Research System of the Collaborative Research Centre 814 – Additive Manufacturing
Mittelgeber: DFG / Sonderforschungsbereich (SFB)
Einsatz in Forschungsprojekten:
A new approach for getting more homegeneous temperature fields in selective laser sintering of polymers
PPS (Polymer Processing Society) (Dresden, 26. Juni 2017 - 29. Juni 2017)
In: AIP Conference Proceedings 2055 2019
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Influence of powder coating on part density as a function of coating parameters
4th International Conference on Additive Technologies (Maribor)
In: 4th International Conference on Additive Technologies 2012
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Methods and procedure of referenced in situ control of lateral contour displacements in additive manufacturing
In: Journal of Sensors and Sensor Systems 10 (2021), S. 219-232
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Referencing of powder bed for in situ detection of lateral layer displacements in additive manufacturing
In: Journal of Sensors and Sensor Systems 10 (2021), S. 247-259
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Thermographic investigation of laser-induced temperature fields in selective
laser beam melting of polymers
In: Optics and Laser Technology 109 (2019), S. 569-576
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