Press releases 2016

For a flexible and a rapid material laser processing highly-dynamic galvanometer mirrors are used similarly as in laser shows. These are supposed to reach prefera-bly high velocities and accelerations and to be rapidly controllable. With a special electronic system developed by the Fraunhofer Institute IWS Dresden, the so called module ESL2-100, it is possible to control the galvanometer directly by the machine control system. This allows a holistic interlinking to the main control system, which simplifies considerably the control procedure. In addition, for the implementation of a laser process a plurality of scanner mirrors can be applied simultaneously.

On Mai 10, 2016 it will finally be done: with the opening of the fair Sensor+Test in Nuremberg Fraunhofer IWS Dresden presents a particular highlight. IWS bears a sig-nificant part in the development of contactless methods for material imaging apply-ing light as a tool, and demonstrates on the fair its newest developments in the area of spectral imaging and its imanto® product range.

Metals with excellent electric conductivity such as copper, aluminum and gold are of special interest in the fields of electric mobility and power electronics. Due to their strong reflectance in the infrared wavelength range, the laser processing of these materials presents a huge challenge. Most of the available continuously radiating high power lasers (cw) operate exactly in this wavelength range. The Fraunhofer IWS can now apply a novel “green” laser for processing tasks of these materials. With a power of 1 kW at 515 nm and a beam quality of 2.5 mm mrad, this novel laser opens up completely new application possibilities for joining and cutting tasks. Furthermore it enables new fields of applications in the area of electric mobility and power electronics.

Within the framework of the joint project »BatCon« (Num. 01 MX12055C), funded by the Federal Ministry for Economic Affairs and Energy, Fraunhofer IWS scientists have developed novel property- and cost-optimized joining techniques for the fabrication of aluminum-copper cell joints over the past three years. In December 2015 all cooperation partners – Robert Bosch GmbH, ElringKlinger AG, Wieland-Werke AG and the Fraunhofer IWS – met for the final colloquium in Dresden. All partners and the project management – the Deutsche Zentrum für Luft- und Raumfahrt (DLR) – were highly pleased with the results. The IWS scientists were able to decisively further develop the technologies for joining processes for cyclically loaded and non-aging Al/Cu-cell joints with very low transition resistance. An implementation into industrial application with industrial partners is very close.

Joining is the key challenge in production processes and often a significant cost factor. The knowledge and the selection of the appropriate procedure is therefore of the utmost importance. Within the framework of the 9th international laser symposium and the joining symposium “Tailored Joining” renowned experts will meet for an international exchange of experiences in Dresden on February, 22 - 24, 2016. The symposia and the open house invitation to the “Innovationsabend für Unternehmen - Industrie @ Fraunhofer IWS“ will offer comprehensive insight into the recent developments and industrial applications of laser and other welding processes. Solid phase and mechanical joining procedures such as adhesive bonding and composite technologies will find a wide presentation platform.

Prof. Dr. rer. nat. habil. Stefan Kaskel, Cair of Anorganic Chemistry at the Technischen Universität Dresden and head of the business unit Chemical Surface- and Reaction Technology at the Fraunhofer-Institut für Werkstoff- und Strahltechnik IWS Dresden received the Japan Society for the Promotion of Science (JSPS) award for his excellent scientific research in the field of energy storage devices. The prize includes a research stay at the National Institute of Advanced Industrial Science and Technology (AIST) in Osaka (Japan).