Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

New CAM system for efficient laser material deposition

14.11.2012
The Fraunhofer Institute for Laser Technology ILT has developed an offline programming system for laser material deposition. The LaCam3D program enables process developers and end-users to generate tool paths quickly, even for complex LMD tasks that have non-standard welding strategies.
The generated paths are translated into machine code, and can be tested for possible collisions via a machine simulation. LACam3D will be presented for the first time at the EuroMold from November 27.-30., 2012 in Frankfurt at the Fraunhofer joint booth, hall 11- C66a.

Unique characteristics of laser material deposition (LMD) in comparison with conventional processes are e.g. the minimalized heat input and low levels of distortion. Combined with the high degree of process accuracy and the potential for automation it offers, this results in LMD becoming increasingly important for industrial applications such as an additive, repair or manufacturing process.

Path planning

The additive manufacture of parts using LMD involves the CAD model of the part being split into horizontal, cross-sectional layers that correspond to the direction in which the part is to be built up. These are then filled out using equidistant tool paths or parallel paths, being projected onto the welding surface, according to the strategy that has been selected. For the repair of parts that have suffered operational wear and tear, the actual geometry is first measured using a laser line scanner to generate a point cloud, from which a surface model is made using reverse engineering. The volume of the defect is ascertained by determining the best fit between the actual geometry and the CAD model of the component, and is then built up using LMD.

Functionalities

LaCam3D provides functionalities for LMD strategies that enable the LMD sequence and welding direction of individual paths to be modified. Parameters like laser power and velocity can be specified and tuned for each individual tool path. When designating tool paths to fill the various layers, the user can choose between equidistant paths and parallel paths that are projected onto the surface of the layer. The paths are automatically cropped to keep within the boundary marking the edge of the defect area. The paths are planned in such a way as to allow enough oversize for the finishing process that follows, in which excess material is machined. There is a specifically designed module available to help plan paths for turbine parts made using additive manufacturing. Due to its modular structure, the program can be complemented as necessary for various applications by further modules.

Collision testing

LaCam3D is equipped with a simulation tool that can check in advance whether the planned LMD process will cause the laser processing head to collide with the part. The machine code is generated using an integrated postprocessor that supports a full range of different systems.
Modularity

As a CAM module for LMD, LaCam3D’s functionalities are designed in such a way that the process developer and end-user can generate LMD paths immediately, even for complex LMD jobs with non-standard LMD strategies. The modular structure of the program allows additional algorithms of particular LMD strategies to be integrated. Currently, a prototype of LaCam3D is used at Fraunhofer ILT in Aachen for about 2 years now, and that they are continuing to develop.

Contacts

Dr. Norbert Pirch
Competence Area Additive Manufacturing and Functional Layers
Phone +49 241 8906-636
norbert.pirch@ilt.fraunhofer.de

Dipl.-Phys. John Flemmer
Polishing Group
Phone +49 241 8906-137
john.flemmer@ilt.fraunhofer.de
Fraunhofer Institute for Laser Technology ILT
Steinbachstraße 15
52074 Aachen, Germany
Phone +49 241 8906-0
Fax +49 241 8906-121

Axel Bauer | Fraunhofer-Institut
Further information:
http://www.ilt.fraunhofer.de

More articles from Trade Fair News:

nachricht Heraeus presents new technologies for foldable touch panels at Touch Taiwan Exhibition
28.07.2016 | Heraeus Noblelight GmbH

nachricht New MAX Infrared Oven is Five Times Faster For Glass Tempering
08.07.2016 | Heraeus Noblelight GmbH

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: Self-assembling nano inks form conductive and transparent grids during imprint

Transparent electronics devices are present in today’s thin film displays, solar cells, and touchscreens. The future will bring flexible versions of such devices. Their production requires printable materials that are transparent and remain highly conductive even when deformed. Researchers at INM – Leibniz Institute for New Materials have combined a new self-assembling nano ink with an imprint process to create flexible conductive grids with a resolution below one micrometer.

To print the grids, an ink of gold nanowires is applied to a substrate. A structured stamp is pressed on the substrate and forces the ink into a pattern. “The...

Im Focus: The Glowing Brain

A new Fraunhofer MEVIS method conveys medical interrelationships quickly and intuitively with innovative visualization technology

On the monitor, a brain spins slowly and can be examined from every angle. Suddenly, some sections start glowing, first on the side and then the entire back of...

Im Focus: Newly discovered material property may lead to high temp superconductivity

Researchers at the U.S. Department of Energy's (DOE) Ames Laboratory have discovered an unusual property of purple bronze that may point to new ways to achieve high temperature superconductivity.

While studying purple bronze, a molybdenum oxide, researchers discovered an unconventional charge density wave on its surface.

Im Focus: Mapping electromagnetic waveforms

Munich Physicists have developed a novel electron microscope that can visualize electromagnetic fields oscillating at frequencies of billions of cycles per second.

Temporally varying electromagnetic fields are the driving force behind the whole of electronics. Their polarities can change at mind-bogglingly fast rates, and...

Im Focus: Continental tug-of-war - until the rope snaps

Breakup of continents with two speed: Continents initially stretch very slowly along the future splitting zone, but then move apart very quickly before the onset of rupture. The final speed can be up to 20 times faster than in the first, slow extension phase.phases

Present-day continents were shaped hundreds of millions of years ago as the supercontinent Pangaea broke apart. Derived from Pangaea’s main fragments Gondwana...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Clash of Realities 2016: 7th Conference on the Art, Technology and Theory of Digital Games

29.07.2016 | Event News

GROWING IN CITIES - Interdisciplinary Perspectives on Urban Gardening

15.07.2016 | Event News

SIGGRAPH2016 Computer Graphics Interactive Techniques, 24-28 July, Anaheim, California

15.07.2016 | Event News

 
Latest News

Vortex laser offers hope for Moore's Law

29.07.2016 | Power and Electrical Engineering

Novel 'repair system' discovered in algae may yield new tools for biotechnology

29.07.2016 | Life Sciences

Clash of Realities 2016: 7th Conference on the Art, Technology and Theory of Digital Games

29.07.2016 | Event News

VideoLinks
B2B-VideoLinks
More VideoLinks >>>