The Lasers in Action Forum takes place over three days at LASYS, Messe Stuttgart, from 5-7 June. Entry to the forum is free of charge to any LASYS visitor.
Lasers in Action is organised by Laser Systems Europe on behalf of Messe Stuttgart.
DAY 3 - Thursday 7 June
Latest approaches in spatter-reduced laser beam welding for macro applications and high-power applications
Peter Kallage, Coherent-Rofin
The use of solid state lasers has increased more and more in recent years. The ability to offer low heat input combined with high process speed and a good repeatability of process results makes the laser an attractive tool for many applications.
Besides the reduced energy consumption of solid state lasers, the quality of their parts is also attracting the focus of end users. One major issue when using the technology however is the high amount of spatter that occurs, which is often an argument against using the laser.
This presentation will cover the latest developments that show benefit in using adapted process fibres, process equipment or process strategies to reduce spatter in high power and large-scale welding applications.
Joining of metal to polymer without adhesive
Annett Klotzbach, Fraunhofer IWS Dresden
The Fraunhofer-Institut für Werkstoff- und Strahltechnik IWS Dresden has developed a new process for joining materials with different properties. Thermal direct joining presses laser-structured metal with thermoplastic components and heats them locally. This causes the thermoplastic to melt, to penetrate into the structures and to adhere to the surface. A specially developed joining gun generates robust connections within seconds. The HeatPressCool-Integrative (HPCI) process is highly suitable for replacing complex adhesive processes.
High pulse energy and high average power femtosecond
Victor Matylitsky, Spectra Physics
Improvements in femtosecond laser performance, reliability and cost have resulted in their adoption for industrial micromachining manufacturing. Another milestone in ultra-short pulsed laser technology is the development of high power lasers capable of meeting the demanding throughput requirements of industries. Spectra-Physics’ industrial femtosecond Spirit 1030-100 laser system, which offers pulse duration below 400fs, pulse energies above 100µJ and average output powers of over 100W, is an ideal tool for the industrial micromachining of a wide range of materials. In this paper, an overview of the Spirit 1030-100’s actual industrial applications will be given. In particular, the Spirit 1030-100 has been tested for the cutting of plastics, typically in the production of flexible OLED displays.
Real time M² and focus position measurement from mW to kW with BWA-MON
Michael Scaggs, Laser Components
Measurement of laser beam metrics, regardless of power, can be challenging. Most methods to date are not real-time due to the need to scan one or more components along the optical axis of the laser beam. Fibre lasers, both single and multimode, are becoming more ubiquitous, and methods to qualify them are in great demand. Laser beam measurements are complex and methods to make these measurements more user and alignment friendly are in demand. This talk discusses simple techniques that provide real-time measurement of a laser’s M2 or BPP that can be utilised from very low powers to powers exceeding 30kW.
CLAMIR: closed-loop laser power control system for LMD/cladding processes
Rodrigo Linares, New Infrared Technologies
CLAMIR is a system for closed-loop control of the laser power during cladding and LMD processes. It’s based in a continuous, real-time monitoring and dimensional measurement of the melt pool geometry using a high-speed infrared camera, acting accurately over the laser power to keep the melt pool dimensions constant. CLAMIR is a compact and reliable system that can be easily installed in most of laser optics using a present observation port. The system is also straightforward to configure. Benefits of using CLAMIR are reduction of faulty parts during LMD manufacturing, and lower damage to the base material in cladding processes.
High resolution performance laser-based additive manufacturing
Derek McKenzie, MODUS Research & Innovation
The HiperLAM projects’s additive manufacturing process will replace existing subtractive top-down processes in two key applications requiring high-resolution printed conductive metallic lines: laser-printed RFID antenna and laser-fingerprinted sensors. Manufacturing processing speeds will increase 10 times for laser-printed RFID antenna and five times in the case of the lead-time for laser printed fingerprint sensor design. HiperLAM features high resolution LIFT printing and laser sintering, using novel high viscous inks to achieve printed conductive metallic structures down to 10μm resolution over large areas (10 to 1000cm2).
OCT as a versatile tool for scanner-based laser
Thibault Bautze, Blackbird Robotersysteme
Optical coherence tomography (OCT) is an advantageous sensor technology for laser applications; it outperforms conventional sensors with its coaxial integration and robustness against process emissions. One of the possible applications for OCT in laser remote welding is the omnidirectional tracking and welding of fillet seams. Simultaneously, the sensor can be used to evaluate the geometry of the welded seam and therefore eliminate the need for a separate quality control. The measurement and closed-loop control of the keyhole-depth will also be addressed in order to provide the most versatile tool available for 3D scanners.
Latest advancements in high power lasers
Dr Evangelos Papastathopoulos, Trumpf
With the introduction of the new TruDisk series Trumpf sets a new benchmark in high power solid state lasers, making the laser unit a nodal point of a full process solution including control and programming of intelligent optics and sensors, optimised for Industry 4.0. In this paper we report how next to state of the art IR thin disk laser technology, these unique features are implemented in material processing with green laser wavelength in frequency doubled thin disk lasers and the new generation of single-mode fibre lasers from Trumpf.
New trends for laser marking
Christian Rest, Trumpf
New materials, more complex shapes, higher productivity, consistent traceability… the list of laser marking challenges is growing. These challenges require different approaches. So the trend is for ultra-short pulse lasers to make high-quality markings – as well as the integration of complex sensor systems and matching software solutions, which makes it possible to realise the whole process chain from reading the data from a database to mark the content on the workpiece and finally writing back the results to the database. The key to a highly efficient production that realises the clear traceability of all components is a perfectly coordinated overall system.
Women in Photonics: The network for female professionals and executives of the photonics industry
Sina Schuh, Photonics BW
The network ‘Women in Photonics’ of Photonics BW was initiated to offer female professionals and executives from industry and research institutes of the photonics sector an exchange platform. In regular meetings, we focus on current topics of the photonics industry and the exchange of personal experience. Furthermore, activities to encourage young talents to pursue a career in photonics are also discussed.
The aim of ‘Women in Photonics’ is to make successful female professionals and executives visible as role models through the active crosslinking and involvement of women in the network of Photonics BW.
We are always happy to welcome new participants from all sectors of photonics!