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.
Coming to a monitor near you: A defect-free, molecule-thick film
27.11.2015 | University of California - Berkeley
Controlling Electromagnetic Radiation by Graphene
27.11.2015 | Universität Augsburg
Chemical weathering of rocks over geological time scales is an important control on the stability of the climate. This weathering is, in turn, highly dependent...
Before the fluid of the middle ear drains and sound waves penetrate for the first time, the inner ear cells of newborn rodents practice for their big debut. Researchers at Johns Hopkins report they have figured out the molecular chain of events that enables the cells to make “sounds” on their own, essentially “practicing” their ability to process sounds in the world around them.
The researchers, who describe their experiments in the Dec. 3 edition of the journal Cell, show how hair cells in the inner ear can be activated in the absence...
Planet Earth experienced a global climate shift in the late 1980s on an unprecedented scale, fuelled by anthropogenic warming and a volcanic eruption, according to new research published this week.
Scientists say that a major step change, or ‘regime shift’, in the Earth’s biophysical systems, from the upper atmosphere to the depths of the ocean and from...
The Fraunhofer Institute for Solar Energy Systems ISE has installed 70 photovoltaic modules on the outer façade of one of its lab buildings. The modules were...
Nerve cells cover their high energy demand with glucose and lactate. Scientists of the University of Zurich now provide new support for this. They show for the first time in the intact mouse brain evidence for an exchange of lactate between different brain cells. With this study they were able to confirm a 20-year old hypothesis.
In comparison to other organs, the human brain has the highest energy requirements. The supply of energy for nerve cells and the particular role of lactic acid...
01.12.2015 | Event News
30.11.2015 | Event News
25.11.2015 | Event News
01.12.2015 | Earth Sciences
01.12.2015 | Life Sciences
01.12.2015 | Earth Sciences