Laser Technik Journal 2016/5 October

Laser Technik Journal 5/2016 (Source: Wiley)

Laser Technik Journal 5/2016 (Source: Wiley)

Cover Picture

Laser transmission welding of a rear seat back made of fiber-reinforced plastic (FRP) yields to a 47 % weight reduction compared to a steel structure. The process is demonstrated by the Fraunhofer Institute of Laser Technology, Aachen, Germany, at the international trade fair for plastics and rubber, K-2016.

Editorial

Laser Welding of Plastic Parts
  • Christopher Pommer (SKZ — German Plastics Center)
  • Page 1

Contents

News

Products

Interview

Process Monitoring

OCT for Process Monitoring of Laser Transmission Welding

Non‐destructive monitoring of laser transmission welding of polymers is a crucial topic in different production areas. Process parameter deviation may result in product failure. Current monitoring often relies on post process or inline methods which are not able to give a qualitative process feedback. Optical coherence tomography (OCT) enables tomographic measurements of transparent material structures (weld seam and…

  • Robert Schmidt, Philippe Ackermann (Fraunhofer IPT)
  • Pages 15-18

Laser Cutting

Laser Cutting Head for High-Brightness Lasers

The present market of metal laser cutting machines is mainly dominated by laser sources that emit radiation in the wavelength range around one micron. The majority of these lasers generate radiation through pumping of ytterbium doped fiber or ytterbium doped disks, or directly from gallium arsenide (GaAs) semiconductor diodes. The latter direct diode approach has been increasing its market share due to a significant…

  • Detlev Wolff, Jean‐Baptiste Karam, Christine Groß (II-VI HighYAG)
  • Pages 19-21
Cutting Plastic Film

In our daily lives, everywhere we look, we encounter plastic film. It has become such an integral part of our lives, that we take it for granted. In some cases, only professionals can even tell that certain product components started out as plastic film. It is one more reason to take a closer look at the topic of film and its applications and processing methods. We would like to present a few main areas and products, show…

  • Thorsten Brandt (Eurolaser)
  • Pages 22-25

Laser Welding

Transmission Laser Welding of Large Plastic Components

More efficient drives, more complex controls and lightweight constructions: these components are becoming increasingly important to cut down energy consumption in the automotive world. Modern joining technologies also make it possible now to optimize large components for car making applications. Laser technologies make a crucial contribution here.

  • Malte Borges (LPKF)
  • Pages 26-29
Oscillation Welding of Al/Al and Al/Cu

Diode lasers provide, in principle, a low beam parameter product with near flat top power distribution. By launching this beam into a standard fiber its profile is deteriorated further. By directly mounting a high brightness direct diode laser on top of a trepanning optic, we avoid additional power loss and beam parameter product reduction and therefore enable aluminum welding already at a medium power level. …

  • Haro Fritsche, Norbert Müller, David Ashkenasi (DirectPhotonics Industries)
  • Pages 30-33
Laser Beam Welding of Copper

Laser beam welding of copper, especially for comparatively high plate thicknesses and low welding speeds, is very challenging critical welding defects are very likely to occur. By reducing the ambient pressure, it becomes possible to increase the process capability in a huge amount. The so called laser beam welding in vacuum (LaVa) process variant allows high quality welding of copper at welding speeds below 2 m/min and…

  • Uwe Reisgen, Simon Olschok, Christoph Turner (RWTH Aachen University)
  • Pages 34-37

Automotive Applications

Laser Applications in Gear Box Manufacturing at Mercedes-Benz

In the past years, the number of laser applications has risen worldwide. Along with that, the variety of the applications grew. The high‐power laser beam was first used in series production for cutting and welding. With decreasing prices and increasing quality of beam sources, applications that have been too expensive or technically not feasible in the past can be realized today. Mercedes‐Benz, the main brand of the Daimler…

  • Patrick Talmon l’Armée (Daimler)
  • Pages 38-41

Material Processing

Laser Processing of Sapphire: Application Know-How Matters

We demonstrate how lasers can be applied for processing of sapphire. Due to its hardness, sapphire is difficult to process with mechanical tools and laser processing is the tool of choice. Based on this example, we show how novel laser material processes are being qualified and how different material qualities as well as process requirements regarding speed and accuracy define an applicative solution consisting of a…

  • Michael Berndt, Markus Danner (Rofin-Baasel Lasertech)
  • Pages 42-45
Ultrashort Pulse Laser Material Processing

The field of ultrashort pulsed lasers has grown dramatically over the past years. Besides many research topics, the industrial application, especially for laser material processing has focused around USP lasers. The success of USP lasers contributes to many economic branches. The advantages ranges from higher output power, shorter pulse duration, innovative amplifier systems to beam guidance. One question remains: Where is…

  • Jens Bliedtner, Christian Schindler, Michael Seiler, Sebastian Wächter, Maria Friedrich, Jan Giesecke (Ernst Abbe Hochschule Jena)
  • Pages 46-50

Calendar of Events

Meetings & Events

Service

Buyers’ Guide
  • Seite 54-56

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