LASYS 10.00-10.30
Enabling ultrafast laser systems David Mitchell, Coherent
Ultrafast lasers are supporting the manufacture of a variety of key consumer products. One major barrier to commercial viability of ultrafast laser processing has been matching the performance and throughput to a targeted cost of ownership. In some cases this can mean using the highest available laser power for the lowest $/Watt ratio and in other cases it can mean a low power laser with low unit cost is most suitable solution. Te presentation describes how modern, modularised picosecond laser technology enables key applications, such as solid state lighting, thin film ablation, sophisticated marking and surface structuring in a highly flexible and compact package.
www.coherent.com
10.30-11.00
Laser welding: closed-loop control and quality assessment
Dr Andreas Blug, Fraunhofer IPM
Laser beam welding enables fast and flexible joining of complex bodies with low distortion. Novel inline measurement techniques are required to assess the quality of weld seams in real time or even to improve laser welding processes by closed-loop control. Tis presentation shows how high-speed image processing can be applied to compensate process driſts by closed-loop control and quality inspection. Te inline measurement technology presented here is a comprehensive in-process surveillance of the keyhole which controls penetration depth in lap joints and monitors seam underfill and spatter. In combination with partial penetration welding processes, this technique improves both quality and productivity.
www.ipm.fraunhofer.de/en.html
11.00-11.30
Cladding with high-power diode lasers
Mark Daichendt, Laserline
Increasingly, high power diode lasers are proving to be an extremely innovative
24 LASER SYSTEMS EUROPE ISSUE 23 • SUMMER 2014 12.00-12.30
Welding of large plastic parts using diode laser lines with on/off switchable beam sections
Andreas Buechel, Jenoptik Automatisierungstechnik
technology in cladding and coating applications. Te advantage of diode lasers over conventional techniques can be summed up in two words: higher quality. Te diode laser achieves an optimum connection at low dilution rate and low heat input, which increases the productivity even more. With diode lasers, worn tools or other components are repaired or shape changes of tools are implemented. Examples of successful applications include the repair of bearings and shaſts and valve seats as well as turbine blades.
www.laserline.de
11.30-12.00
Dual-axis scan head for high processing speeds up to 200m/s
Erwin Wagner, Raylase
New laser applications mainly in the semiconductor and solar industry require the usage of pico- or femtosecond lasers. Using these lasers, brilliant processing results and high throughput could be realised if the laser process is running at the required repetition rate and pulse overlap. Unfortunately, conventional galvanometer-scanner based scan heads cannot achieve the required processing speed. In order to overcome this limitation, Raylase developed a dual-axis scan head, which combines highspeed polygon deflection technology with galvanometer- scanners. Square field sizes, scanning speeds of up to 200m/s and high accuracy for are the result.
www.raylase.de
In order to extend the application range of laser transmission welding, Jenoptik has developed diode laser lines of up to 100mm length consisting of eight beam sections. Tese sections can be switched on and off individually according to the programmed welding figure. Each single beam of the diode laser line is collimated in the fast axis to a beam size of 1mm with an optical laser power of 100W. Tis powerful tool allows welding of up to 10m²/s of foil in individual shapes. Te laser lines are available at all standard wavelengths of 808, 940 and 980nm. Tis new method allows the efficient joining of large plastic components, e.g. the welding of chute channels on instrument panels, door panels in motor vehicles or heat exchanger systems in household appliances.
www.jenoptik.com/en-laser-welding
12.30-13.00
Important features for 3D laser processing
Ralf Kohllöffel, Trumpf Laser- und Systemtechnik
More than 30 years ago, 3D laser processing found its way into industrial manufacturing and is now well-established as a means of production in many applications and industries. Certainly, the requirements of the systems of today are more detailed and diverse than the original objective simply to direct the CO2
laser beam via beam guidance in a specific working range as precisely as possible. @lasersystemsmag |
www.lasersystemseurope.com
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