Repair and Wear Protection for Large Tools Becomes More Efficient
The goal of a new research project at the Laser Zentrum Hannover e.V. (LZH) is to significantly reduce the effort and cost for repairs and wear protection of large-sized tools.
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.
Laser Zentrum Hannover e.V.
Germany Tel.: +49 511 2788-151
Fax: +49 511 2788-100
The Laser Zentrum Hannover e.V. (LZH) carries out research and development in the field of laser technology and is supported by the Ministry of Economic Affairs, Labour and Transport of the State of Lower Saxony (Niedersächsisches Ministerium für Wirtschaft, Arbeit und Verkehr).
Michael Botts | idw
The most recent press releases about innovation >>>
Die letzten 5 Focus-News des innovations-reports im Überblick:
Whether you call it effervescent, fizzy, or sparkling, carbonated water is making a comeback as a beverage. Aside from quenching thirst, researchers at the University of Illinois at Urbana-Champaign have discovered a new use for these "bubbly" concoctions that will have major impact on the manufacturer of the world's thinnest, flattest, and one most useful materials -- graphene.
As graphene's popularity grows as an advanced "wonder" material, the speed and quality at which it can be manufactured will be paramount. With that in mind,...
Physicists at the University of Bonn have managed to create optical hollows and more complex patterns into which the light of a Bose-Einstein condensate flows. The creation of such highly low-loss structures for light is a prerequisite for complex light circuits, such as for quantum information processing for a new generation of computers. The researchers are now presenting their results in the journal Nature Photonics.
Light particles (photons) occur as tiny, indivisible portions. Many thousands of these light portions can be merged to form a single super-photon if they are...
For the first time, scientists have shown that circular RNA is linked to brain function. When a RNA molecule called Cdr1as was deleted from the genome of mice, the animals had problems filtering out unnecessary information – like patients suffering from neuropsychiatric disorders.
While hundreds of circular RNAs (circRNAs) are abundant in mammalian brains, one big question has remained unanswered: What are they actually good for? In the...
An experimental small satellite has successfully collected and delivered data on a key measurement for predicting changes in Earth's climate.
The Radiometer Assessment using Vertically Aligned Nanotubes (RAVAN) CubeSat was launched into low-Earth orbit on Nov. 11, 2016, in order to test new...
A study led by scientists of the Max Planck Institute for the Structure and Dynamics of Matter (MPSD) at the Center for Free-Electron Laser Science in Hamburg presents evidence of the coexistence of superconductivity and “charge-density-waves” in compounds of the poorly-studied family of bismuthates. This observation opens up new perspectives for a deeper understanding of the phenomenon of high-temperature superconductivity, a topic which is at the core of condensed matter research since more than 30 years. The paper by Nicoletti et al has been published in the PNAS.
Since the beginning of the 20th century, superconductivity had been observed in some metals at temperatures only a few degrees above the absolute zero (minus...