Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:


Automated Laser Material Processing – precise, flexible and time-saving

At the International Sheet Metal Working Technology Exhibition, EuroBLECH 2010 in Hanover, Germany (from October 26 to 30, 2010), the Fraunhofer Institute for Laser Technology ILT will be presenting tailor-made system solutions for higher component precision and process stability. Customers from all sectors of sheet metal processing industries can find out more about the newest processes and system components of the researchers from Aachen at Stand 11 in Hall C06.

By combining laser cutting and laser welding in a single processing head, the Fraunhofer researchers have created a system that leads to higher flexibility in plant dimensioning, optimizing the processing sequence and reducing the clamping, storage and transport times. To do this, the institute has developed a so-called combi-head, which is produced and marketed by the cooperation partner Laserfact GmbH in Aachen and whose latest functional upgrades will be presented at EuroBLECH 2010.

The combi-head cuts and measures the U-shaped section…
Fraunhofer Institute for Laser Technology ILT, Aachen

and welds on the face plate.
Fraunhofer Institute for Laser Technology ILT, Aachen

Thanks to the Tool Center Point, common to both processes, component precision and process stability during laser cutting and welding have been significantly increased. The signals from the capacitive distance sensor system of the combi-head are used for normal distance control as well as for component measurement so as to precisely predetermine the subsequent weld seam.

Combi-head in Integrated Process Chains

In this way, complex sheet metal component parts can be cut to size, measured, welded and finally cut again, all in an integrated process chain. Dr. Dirk Petring, group manager of Macro Joining and Cutting, explains, »The connection of combi-processing and capacitive component measurement is not only suitable for concealed t-joints in structural components of automobile construction, but can also offer new solutions wherever curved or deep-drawn sheet metal parts need to be joined together to create a precise sheet metal group in spite of their geometric tolerances.«

TCP and processing heads were also a part of another process developed at the Fraunhofer ILT: an image processing system »observes« the laser processing position on the workpiece directly through the processing optics – analogous to photography with a single lens reflex camera. The direct surroundings of the processing position are analyzed by a camera system with downstream image processing. »The system measures directly in the area of the processing position and not at the head or in the robot axes,« explains Dipl. Ing. Christoph Franz, scientist at the Fraunhofer ILT. »Since the process gauges the ongoing measurement accuracy, no measurement errors are made.« The measuring system records the current process speed and uncovers deviations from the preset values. It ensures that the processing head follows the contours of the workpiece exactly. According to Franz, »The user receives precise feedback on how the cinematic process parameters comply to the track that was previously programmed into the machine control system. With this process, the tracks of any processing system can be measured.« This is an important point with lasers, for which the so-called energy per unit length has to be constant during the entire processing.

Process Monitoring during »Laser Brazing«

In Hanover a joint development with the Fraunhofer IPT was also exhibited: »Coaxial Process Control (CPC)«, developed specially for laser brazing, takes the process zones under the magnifying glass in the visible and near infrared spectral range (NIR). The visible images deliver data on feed speed, wire position and geometric measurement of the braze seam. The NIR images informs users about the heat distribution in the workpiece, the emergence of pores or about single-sided moistening. »The process monitoring during the laser process makes a further production step – a time-consuming and expensive quality control – superfluous,« says Dipl.-Ing. Michael Ungers, scientist at the Fraunhofer ILT. The following speaks for the CPC model: in comprehensive test series with steel and aluminum working materials, the system was tested and also found suitable for automated process monitoring thanks to special software.

Contact Partners at the Fraunhofer ILT
Our experts would be glad to answer any questions you may have:
Dr. Dirk Petring
Group Manager, Macro Joining and Cutting
Telephone +49 241 8906-210
Dipl.-Ing. Christoph Franz
Telephone +49 241 8906-621
Dipl.-Phys. Michael Ungers
Telephone +49 241 8906-281
Fraunhofer Institute for Laser Technology ILT
Steinbachstraße 15
52074 Aachen, Germany
Tel. +49 241 8906-0
Fax. +49 241 8906-121

Axel Bauer | Fraunhofer ILT
Further information:

More articles from Trade Fair News:

nachricht Creating living spaces for people: The »Fraunhofer CityLaboratory« at BAU 2017
14.10.2016 | Fraunhofer-Gesellschaft

nachricht Reducing Weight through Laser-assisted Material Processing in Automobile Construction
13.10.2016 | Fraunhofer-Institut für Lasertechnik ILT

All articles from Trade Fair News >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: New 3-D wiring technique brings scalable quantum computers closer to reality

Researchers from the Institute for Quantum Computing (IQC) at the University of Waterloo led the development of a new extensible wiring technique capable of controlling superconducting quantum bits, representing a significant step towards to the realization of a scalable quantum computer.

"The quantum socket is a wiring method that uses three-dimensional wires based on spring-loaded pins to address individual qubits," said Jeremy Béjanin, a PhD...

Im Focus: Scientists develop a semiconductor nanocomposite material that moves in response to light

In a paper in Scientific Reports, a research team at Worcester Polytechnic Institute describes a novel light-activated phenomenon that could become the basis for applications as diverse as microscopic robotic grippers and more efficient solar cells.

A research team at Worcester Polytechnic Institute (WPI) has developed a revolutionary, light-activated semiconductor nanocomposite material that can be used...

Im Focus: Diamonds aren't forever: Sandia, Harvard team create first quantum computer bridge

By forcefully embedding two silicon atoms in a diamond matrix, Sandia researchers have demonstrated for the first time on a single chip all the components needed to create a quantum bridge to link quantum computers together.

"People have already built small quantum computers," says Sandia researcher Ryan Camacho. "Maybe the first useful one won't be a single giant quantum computer...

Im Focus: New Products - Highlights of COMPAMED 2016

COMPAMED has become the leading international marketplace for suppliers of medical manufacturing. The trade fair, which takes place every November and is co-located to MEDICA in Dusseldorf, has been steadily growing over the past years and shows that medical technology remains a rapidly growing market.

In 2016, the joint pavilion by the IVAM Microtechnology Network, the Product Market “High-tech for Medical Devices”, will be located in Hall 8a again and will...

Im Focus: Ultra-thin ferroelectric material for next-generation electronics

'Ferroelectric' materials can switch between different states of electrical polarization in response to an external electric field. This flexibility means they show promise for many applications, for example in electronic devices and computer memory. Current ferroelectric materials are highly valued for their thermal and chemical stability and rapid electro-mechanical responses, but creating a material that is scalable down to the tiny sizes needed for technologies like silicon-based semiconductors (Si-based CMOS) has proven challenging.

Now, Hiroshi Funakubo and co-workers at the Tokyo Institute of Technology, in collaboration with researchers across Japan, have conducted experiments to...

All Focus news of the innovation-report >>>



Event News

#IC2S2: When Social Science meets Computer Science - GESIS will host the IC2S2 conference 2017

14.10.2016 | Event News

Agricultural Trade Developments and Potentials in Central Asia and the South Caucasus

14.10.2016 | Event News

World Health Summit – Day Three: A Call to Action

12.10.2016 | Event News

Latest News

Resolving the mystery of preeclampsia

21.10.2016 | Health and Medicine

Stanford researchers create new special-purpose computer that may someday save us billions

21.10.2016 | Information Technology

From ancient fossils to future cars

21.10.2016 | Materials Sciences

More VideoLinks >>>