No suitable process control method for laser processing of fiber-reinforced plastics is currently available.
Therefore scientists at the Laser Zentrum Hannover e.V. (LZH) are now working together with the Sensortherm GmbH and Newson nv on an innovative double scanner processing head: In this processing head, the beam path of the processing laser is decoupled from the detection beam path used for temperature measurement.
The new measurement method will soon be able to accurately monitor thermally critical areas of the processing geometry. Photo: LZH
This makes it possible to have spatially flexible and temporally high-resolution measurements during the processing of fiber-reinforced plastic.
The combined scanning head should make it possible to measure any point within or without the laser interaction zone, during the running process. In order to achieve this, the project partners decouple the laser beam path from the path of the high speed pyrometer.
In this process, the measurement beam of the pyrometer will be guided by separate scanner mirrors. These are especially tuned to the detection wavelength of the pyrometer.
Process control for fiber-reinforced plastic materials
Highly accurate online temperature measurement is especially important for laser processing of fiber-reinforced plastic materials, such as carbon fiber reinforced plastics (CFRP). With the combined scanning head and the associated measurement method, thermally critical areas in the processing geometry can be accurately monitored. This principle builds the foundation for active intervention in the process and its optimization.
While the LZH is developing the affiliated laser processes and the process control for welding and cutting of fiber-reinforced plastic materials, Newson nv, Berlare-Overmere, Belgium, is developing the actual combined scanning head.
An innovative, high speed pyrometer for different wavelength ranges is being adapted to this processing head by Sensortherm GmbH, Sulzbach/Taunus. Furthermore, Sensortherm is optimizing this pyrometer for laser transmission welding, and for laser cutting and material removal.
The use of the combined scanning head is not limited to laser processing of fiber-reinforced plastic materials, meaning that metals or glass materials, for example, can also be processed.
The European EraSME project A'Quilaco (Advanced online quality and process control for high speed laser machining of composites) started on January 1st, 2014, and will run for two years. In Germany, A'Quilaco is financially supported by the Federal Ministry for Economic Affairs and Energy (BMWi), and in Belgium by the IWT "agentschap voor Innovatie door Wetenschap en Technologie".
http://www.lzh.de/en/projects/a-quilaco - project website
Lena Bennefeld | Laser Zentrum Hannover e.V.
An innovative high-performance material: biofibers made from green lacewing silk
20.01.2017 | Fraunhofer-Institut für Angewandte Polymerforschung IAP
Treated carbon pulls radioactive elements from water
20.01.2017 | Rice University
An important step towards a completely new experimental access to quantum physics has been made at University of Konstanz. The team of scientists headed by...
Yersiniae cause severe intestinal infections. Studies using Yersinia pseudotuberculosis as a model organism aim to elucidate the infection mechanisms of these...
Researchers from the University of Hamburg in Germany, in collaboration with colleagues from the University of Aarhus in Denmark, have synthesized a new superconducting material by growing a few layers of an antiferromagnetic transition-metal chalcogenide on a bismuth-based topological insulator, both being non-superconducting materials.
While superconductivity and magnetism are generally believed to be mutually exclusive, surprisingly, in this new material, superconducting correlations...
Laser-driving of semimetals allows creating novel quasiparticle states within condensed matter systems and switching between different states on ultrafast time scales
Studying properties of fundamental particles in condensed matter systems is a promising approach to quantum field theory. Quasiparticles offer the opportunity...
Among the general public, solar thermal energy is currently associated with dark blue, rectangular collectors on building roofs. Technologies are needed for aesthetically high quality architecture which offer the architect more room for manoeuvre when it comes to low- and plus-energy buildings. With the “ArKol” project, researchers at Fraunhofer ISE together with partners are currently developing two façade collectors for solar thermal energy generation, which permit a high degree of design flexibility: a strip collector for opaque façade sections and a solar thermal blind for transparent sections. The current state of the two developments will be presented at the BAU 2017 trade fair.
As part of the “ArKol – development of architecturally highly integrated façade collectors with heat pipes” project, Fraunhofer ISE together with its partners...
19.01.2017 | Event News
10.01.2017 | Event News
09.01.2017 | Event News
20.01.2017 | Awards Funding
20.01.2017 | Materials Sciences
20.01.2017 | Life Sciences