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.
Young Scientist Discovers Magnetic Material Unnecessary to Create Spin Current
27.07.2015 | Argonne National Laboratory
Quantum dots light the way
21.07.2015 | The Agency for Science, Technology and Research (A*STAR)
Researchers have developed an ultrafast light-emitting device that can flip on and off 90 billion times a second and could form the basis of optical computing.
Joint BioEnergy Institute study identifies bacterial protein that is key to protecting rice against bacterial blight
A bacterial signal that when recognized by rice plants enables the plants to resist a devastating blight disease has been identified by a multi-national team...
Researchers in the Cockrell School of Engineering at The University of Texas at Austin are one step closer to delivering smart windows with a new level of energy efficiency, engineering materials that allow windows to reveal light without transferring heat and, conversely, to block light while allowing heat transmission, as described in two new research papers.
By allowing indoor occupants to more precisely control the energy and sunlight passing through a window, the new materials could significantly reduce costs for...
Argonne scientists used Mira to identify and improve a new mechanism for eliminating friction, which fed into the development of a hybrid material that exhibited superlubricity at the macroscale for the first time. Argonne Leadership Computing Facility (ALCF) researchers helped enable the groundbreaking simulations by overcoming a performance bottleneck that doubled the speed of the team's code.
While reviewing the simulation results of a promising new lubricant material, Argonne researcher Sanket Deshmukh stumbled upon a phenomenon that had never been...
A NASA camera on the Deep Space Climate Observatory (DSCOVR) satellite has returned its first view of the entire sunlit side of Earth from one million miles away.
The color images of Earth from NASA's Earth Polychromatic Imaging Camera (EPIC) are generated by combining three separate images to create a...
23.07.2015 | Event News
10.07.2015 | Event News
25.06.2015 | Event News
27.07.2015 | Materials Sciences
27.07.2015 | Information Technology
27.07.2015 | Power and Electrical Engineering