Design of an Optical system for the In Situ Process Monitoring of Selective Laser Melting (SLM)

By Philipp Lott, H. Schleifenbaum, Wilhelm Meiners, K. Wissenbach, C. Hinke, Jan Bültmann. 2011

214 citations recorded by the source corpus.

Selective Laser Melting (SLM) is an Additive Manufacturing technology that enables the production of complex shaped individual parts with series identical mechanical properties. Areas of improvement are up to now quality and reproducibility of parts made by SLM due to different kinds of errors. Therefore the integration of a monitoring and control module into a SLM-machine is aspired. The design of such an optical system capable of monitoring high scanning velocities and melt pool dynamics is introduced as a first step.

Subfields: Industrial and Manufacturing Engineering, Mechanical Engineering

View Paper: https://www.semanticscholar.org/paper/320e716e0dfb566f9bf40efec3730f3e064405d3

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In Industrial and Manufacturing Engineering

In Mechanical Engineering

Citations in the corpus

Process defects and in situ monitoring methods in metal powder bed fusion: a review (2017, unknown): “(2015) proposed another version of the co-axial monitoring set-up for SLM with two major differences: the presence of a co-axial laser illumination source (Lott et al., 2011; Thombansen et al., 2015) and a pre-focusing unit (Thombansen et al.”
Economic implications of 3D printing: Market structure models in light of additive manufacturing revisited (2015, background): “By adding material layer by layer until the product is finalized, AM has fewer process and design restrictions; it therefore also allows for functionally optimized product designs (e.g., lightweight designs, integrated cooling chambers) (Petrovic et al., 2010; Lott et al., 2011).”
A review on quality control in additive manufacturing (2018, methodology): “Lott et al. (2011) analyzed images of melt pool size to adjust laser output power by using a CMOS camera with an additional illumination source required for high scanning velocities, resolution, as well as photodiodes (Lott et al., 2011).”
Metal additive manufacturing in the commercial aviation industry: A review (2019, background): “Indeed, the development and adoption of in-situ process monitoring systems with a direct feedback loop would incentivize the integration of AM processes in the industry [161, 162].”
Additive manufacturing of fatigue resistant materials: Challenges and opportunities (2017, background): “New developments in AM processes, along with innovations in advanced materials, have enabled more unique approaches for product development, manufacturing, and supply chain management [5,6].”
In-process sensing in selective laser melting (SLM) additive manufacturing (2016, background): “Any electromagnetic monitoring system must be equally capable of reacting to these high scanning velocities and rapid melt pool dynamics in addition to being able to resolve small spatial variations [1].”
Quality assessment in laser welding: a critical review (2017, background): “, CCD and CMOS cameras), spatially integrated (photodiodes), or spectrally resolved (spectrometers) techniques [53].”