Up to now, automated manufacturing of complex glass parts is limited.
Scientists of the Glass Group at the Laser Zentrum Hannover e.V. (LZH) have therefore developed a process for the laser-based joining of borosilicate and quartz glass. In order to achieve a constant quality of the parts, the surface temperature is controlled without contact during the process, and thus, the glass viscosity for joining is reduced in a pre-defined way.
Quartz glass: L angle after the welding process.
Powder filler material is used for bridging the gap. The results of the project show that the new process setup is very well suited for automated manufacturing. The research work was supported by the German Federal Ministry of Economics and Technology.
Complex glass parts are, in most cases, manufactured manually by a glass apparatus maker using a gas flame. Since the process cannot be entirely controlled, the quality fluctuates. In order to be able to automate the production of complex parts, e.g. for chemical apparatus engineering, LZH scientists have developed a laser-based process for joining glass parts made of borosilicate and quartz glass.
The special feature of the process is an integrated temperature control that regulates the viscosity of the parts in a pre-defined way during the welding process: Here, a CO2 laser beam source provides the required amount of heat energy. The temperature is measured without contact using a pyrometer.
In order bridge gaps at, for example, L angle geometries, glass powder is added as filler material during the joining process. In doing so, the glass powder is melted and forms a homogeneous welding seam with a constant bead height. The new process setup enables automated joining of glass in various welding configurations, such as butt joints, fillet joints and L angles.
The „Research Association Technique and Glass“ (FTG e.V.) submitted the application for the research project titled “laser-based joining of glass parts using powder filler material” (powder joining). The commitment and know-how of the FTG members significantly contributed to the success of the project.
The IGF project no. 17029 N „laser-based joining of glass parts using powder filler material“ of the „Research Association Tech-nique and Glass“ (FTG e.V., Bronnbach 28, 97877 Wertheim, Germany) was supported by the German Federation of Industrial Research Associations (AiF e.V.) within the scope of the Industrial Collective Research Programme (IGF) of the German Federal Ministry of Economics and Technology on the basis of a decision by the German Bundestag.
The complete project report is available upon request to email@example.com.
Lena Bennefeld | Laser Zentrum Hannover e.V.
Nanobionics Supercharge Photosynthesis
22.05.2015 | Department of Energy, Office of Science
Mesoporous Particles for the Development of Drug Delivery System Safe to Human Bodies
22.05.2015 | National Institute for Materials Science
Physicists have developed an innovative method that could enable the efficient use of nanocomponents in electronic circuits. To achieve this, they have developed a layout in which a nanocomponent is connected to two electrical conductors, which uncouple the electrical signal in a highly efficient manner. The scientists at the Department of Physics and the Swiss Nanoscience Institute at the University of Basel have published their results in the scientific journal “Nature Communications” together with their colleagues from ETH Zurich.
Electronic components are becoming smaller and smaller. Components measuring just a few nanometers – the size of around ten atoms – are already being produced...
Development and implementation of an advanced automobile parking navigation platform for parking services
To fulfill the requirements of the industry, PolyU researchers developed the Advanced Automobile Parking Navigation Platform, which includes smart devices,...
The world's first electrical car and passenger ferry powered by batteries has entered service in Norway. The ferry only uses 150 kWh per route, which...
On Tuesday, 19 May 2015 the research icebreaker Polarstern will leave its home port in Bremerhaven, setting a course for the Arctic. Led by Dr Ilka Peeken from the Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research (AWI) a team of 53 researchers from 11 countries will investigate the effects of climate change in the Arctic, from the surface ice floes down to the seafloor.
RV Polarstern will enter the sea-ice zone north of Spitsbergen. Covering two shallow regions on their way to deeper waters, the scientists on board will focus...
Nanoengineers at the University of California, San Diego developed a gel filled with toxin-absorbing nanosponges that could lead to an effective treatment for skin and wound infections caused by MRSA (methicillin-resistant Staphylococcus aureus), an antibiotic-resistant bacteria. This "nanosponge-hydrogel" minimized the growth of skin lesions on mice infected with MRSA - without the use of antibiotics. The researchers recently published their findings online in Advanced Materials.
To make the nanosponge-hydrogel, the team mixed nanosponges, which are nanoparticles that absorb dangerous toxins produced by MRSA, E. coli and other...
20.05.2015 | Event News
18.05.2015 | Event News
12.05.2015 | Event News
22.05.2015 | Materials Sciences
22.05.2015 | Information Technology
22.05.2015 | Materials Sciences