A new innovative deposition welding process is being developed, which can stabilize inexpensive yet imprecise gas metal arc welding (GMAW) by using laser radiation. This new process also makes the welding much faster. This development is especially interesting for forming and injection molding tools, or for tools used in mining and tunnel construction.
"The laser radiation generates a path with an increased conductivity directly in the arc," says Alexander Borroi, engineer at the LZH. "The laser determines the location and amount of the deposited metals, and you can weld more precisely and faster than with gas metal arc welding alone."
On the one hand, the combination of a GMAW- device with a diode laser of high average output ensures that operating costs are kept relatively low. On the other hand, the preciseness of the new process ensures a significant reduction of post processing. Further cost savings result from the form of the surface material. Instead of powder, wire is applied, which makes the entire powder recycling unit redundant.
"The development of a mobile system is especially interesting", adds Barroi. "This makes direct on site repairs possible, and accordingly long downtimes resulting from demounting and transporting large tools is no longer necessary."
The new deposition welding process is not only suited for repairs, but also for protection of tool edges and surfaces from abrasion and corrosion. Further fields of application, for example the construction of complex components via deposition welding, should also be opened.
The project "Progenial" is carried out in cooperation with the ERLAS Erlanger Lasertechnik GmbH and the MERKLE Schweißanlagentechnik GmbH. Progenial runs until the end of August 2011 and is sponsored by the German Federal Ministry of Education and Research (BMBF) within the framework of the funding program Optical Technologies. Project management is carried out by the VDI-Technologiezentrum GmbH.
CeGlaFlex project: wafer-thin, unbreakable and flexible ceramic and glass
25.04.2017 | Fraunhofer-Institut für Lasertechnik ILT
Additive manufacturing, from macro to nano
11.04.2017 | Laser Zentrum Hannover e.V.
More and more automobile companies are focusing on body parts made of carbon fiber reinforced plastics (CFRP). However, manufacturing and repair costs must be further reduced in order to make CFRP more economical in use. Together with the Volkswagen AG and five other partners in the project HolQueSt 3D, the Laser Zentrum Hannover e.V. (LZH) has developed laser processes for the automatic trimming, drilling and repair of three-dimensional components.
Automated manufacturing processes are the basis for ultimately establishing the series production of CFRP components. In the project HolQueSt 3D, the LZH has...
Reflecting the structure of composites found in nature and the ancient world, researchers at the University of Illinois at Urbana-Champaign have synthesized thin carbon nanotube (CNT) textiles that exhibit both high electrical conductivity and a level of toughness that is about fifty times higher than copper films, currently used in electronics.
"The structural robustness of thin metal films has significant importance for the reliable operation of smart skin and flexible electronics including...
The nearby, giant radio galaxy M87 hosts a supermassive black hole (BH) and is well-known for its bright jet dominating the spectrum over ten orders of magnitude in frequency. Due to its proximity, jet prominence, and the large black hole mass, M87 is the best laboratory for investigating the formation, acceleration, and collimation of relativistic jets. A research team led by Silke Britzen from the Max Planck Institute for Radio Astronomy in Bonn, Germany, has found strong indication for turbulent processes connecting the accretion disk and the jet of that galaxy providing insights into the longstanding problem of the origin of astrophysical jets.
Supermassive black holes form some of the most enigmatic phenomena in astrophysics. Their enormous energy output is supposed to be generated by the...
The probability to find a certain number of photons inside a laser pulse usually corresponds to a classical distribution of independent events, the so-called...
Microprocessors based on atomically thin materials hold the promise of the evolution of traditional processors as well as new applications in the field of flexible electronics. Now, a TU Wien research team led by Thomas Müller has made a breakthrough in this field as part of an ongoing research project.
Two-dimensional materials, or 2D materials for short, are extremely versatile, although – or often more precisely because – they are made up of just one or a...
28.04.2017 | Event News
20.04.2017 | Event News
18.04.2017 | Event News
28.04.2017 | Medical Engineering
28.04.2017 | Earth Sciences
28.04.2017 | Life Sciences