A this year’s EuroMold, which takes place in Frankfurt from November 25-28, 2014, the Fraunhofer Institute for Laser Technology ILT will for the first time present its new SLM machine design and exposure concept. This solution makes it easy to scale productivity and building space at significantly lower cost than previous machine designs allowed.
Additive manufacturing via selective laser melting (SLM) has been successfully used to make prototypes and small-series production runs of predominantly compact components for a number of years now.
But users want the ability to increase productivity via higher build-up rates, and would like more flexibility in terms of available building space. Beyond this, it remains vitally important for series production on an industrial scale to have robust process engineering with reproducible component quality and the ability to monitor processes.
Experts are currently pursuing several approaches to increasing productivity and building space. Until now, productivity has mainly been boosted by using higher laser power in combination with optics systems that allow operators to adjust the beam diameter. Larger building spaces are currently achieved through the use of a movable single optical system or multiple parallel beam sources and scanner systems.
Systematic advantages of the new design
Scientists at Fraunhofer ILT used funding provided by the Cluster of Excellence »Integrative Production Technology for High-Wage Countries« to develop, design and build a new machine concept at their site in Aachen. Their design dispenses with scanner systems altogether and instead relies on a printer head featuring several individually controllable diode lasers that is moved using linear axes.
The advantage of multi-spot processing is that it means the system’s build-up rate can be increased significantly by adding a virtually unlimited number of beam sources – with no need for modifications to the system design, exposure control software or process parameters. The new plant design also makes it possible to increase building space simply by extending the travel lengths of the axis system and without changing the optical system.
In addition, the processing head has a local shielding gas flow system that guarantees a constant stream of shielding gas at each processing point, regardless of the size of the installation space. This is essential for achieving position-independent, reproducible component quality. The new design also allows process monitoring systems to be incorporated into the production system. These monitoring systems can also be set up in much simpler form than current coaxial systems allow.
Fraunhofer ILT at EuroMold 2014
Experts from Fraunhofer ILT will use a laboratory demonstrator to present their new SLM machine concept at the joint Fraunhofer booth C66 in Hall 11.
M.Sc. Florian Eibl
Rapid Manufacturing Group
Telephone +49 241 8906-193
Dr. Wilhelm Meiners
Head of Rapid Manufacturing Group
Telephone +49 241 8906-301
Fraunhofer Institute for Laser Technology ILT
52074 Aachen, Germany
Petra Nolis | Fraunhofer-Institut
COMPAMED 2016 connected medical devices and people
23.11.2016 | IVAM Fachverband für Mikrotechnik
Successfully transferring Industrie 4.0 into reality
21.11.2016 | Deutsches Forschungszentrum für Künstliche Intelligenz GmbH, DFKI
In recent years, lasers with ultrashort pulses (USP) down to the femtosecond range have become established on an industrial scale. They could advance some applications with the much-lauded “cold ablation” – if that meant they would then achieve more throughput. A new generation of process engineering that will address this issue in particular will be discussed at the “4th UKP Workshop – Ultrafast Laser Technology” in April 2017.
Even back in the 1990s, scientists were comparing materials processing with nanosecond, picosecond and femtosesecond pulses. The result was surprising:...
Have you ever wondered how you see the world? Vision is about photons of light, which are packets of energy, interacting with the atoms or molecules in what...
A multi-institutional research collaboration has created a novel approach for fabricating three-dimensional micro-optics through the shape-defined formation of porous silicon (PSi), with broad impacts in integrated optoelectronics, imaging, and photovoltaics.
Working with colleagues at Stanford and The Dow Chemical Company, researchers at the University of Illinois at Urbana-Champaign fabricated 3-D birefringent...
In experiments with magnetic atoms conducted at extremely low temperatures, scientists have demonstrated a unique phase of matter: The atoms form a new type of quantum liquid or quantum droplet state. These so called quantum droplets may preserve their form in absence of external confinement because of quantum effects. The joint team of experimental physicists from Innsbruck and theoretical physicists from Hannover report on their findings in the journal Physical Review X.
“Our Quantum droplets are in the gas phase but they still drop like a rock,” explains experimental physicist Francesca Ferlaino when talking about the...
The Max Planck Institute for Physics (MPP) is opening up a new research field. A workshop from November 21 - 22, 2016 will mark the start of activities for an innovative axion experiment. Axions are still only purely hypothetical particles. Their detection could solve two fundamental problems in particle physics: What dark matter consists of and why it has not yet been possible to directly observe a CP violation for the strong interaction.
The “MADMAX” project is the MPP’s commitment to axion research. Axions are so far only a theoretical prediction and are difficult to detect: on the one hand,...
16.11.2016 | Event News
01.11.2016 | Event News
14.10.2016 | Event News
08.12.2016 | Physics and Astronomy
08.12.2016 | Health and Medicine
08.12.2016 | Life Sciences