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 Bug-proof communication with entangled photons
22.06.2017 | Fraunhofer-Gesellschaft

nachricht LZH at the LASER World of Photonics 2017: Light for Innovation
16.06.2017 | Laser Zentrum Hannover e.V.

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: Can we see monkeys from space? Emerging technologies to map biodiversity

An international team of scientists has proposed a new multi-disciplinary approach in which an array of new technologies will allow us to map biodiversity and the risks that wildlife is facing at the scale of whole landscapes. The findings are published in Nature Ecology and Evolution. This international research is led by the Kunming Institute of Zoology from China, University of East Anglia, University of Leicester and the Leibniz Institute for Zoo and Wildlife Research.

Using a combination of satellite and ground data, the team proposes that it is now possible to map biodiversity with an accuracy that has not been previously...

Im Focus: Climate satellite: Tracking methane with robust laser technology

Heatwaves in the Arctic, longer periods of vegetation in Europe, severe floods in West Africa – starting in 2021, scientists want to explore the emissions of the greenhouse gas methane with the German-French satellite MERLIN. This is made possible by a new robust laser system of the Fraunhofer Institute for Laser Technology ILT in Aachen, which achieves unprecedented measurement accuracy.

Methane is primarily the result of the decomposition of organic matter. The gas has a 25 times greater warming potential than carbon dioxide, but is not as...

Im Focus: How protons move through a fuel cell

Hydrogen is regarded as the energy source of the future: It is produced with solar power and can be used to generate heat and electricity in fuel cells. Empa researchers have now succeeded in decoding the movement of hydrogen ions in crystals – a key step towards more efficient energy conversion in the hydrogen industry of tomorrow.

As charge carriers, electrons and ions play the leading role in electrochemical energy storage devices and converters such as batteries and fuel cells. Proton...

Im Focus: A unique data centre for cosmological simulations

Scientists from the Excellence Cluster Universe at the Ludwig-Maximilians-Universität Munich have establised "Cosmowebportal", a unique data centre for cosmological simulations located at the Leibniz Supercomputing Centre (LRZ) of the Bavarian Academy of Sciences. The complete results of a series of large hydrodynamical cosmological simulations are available, with data volumes typically exceeding several hundred terabytes. Scientists worldwide can interactively explore these complex simulations via a web interface and directly access the results.

With current telescopes, scientists can observe our Universe’s galaxies and galaxy clusters and their distribution along an invisible cosmic web. From the...

Im Focus: Scientists develop molecular thermometer for contactless measurement using infrared light

Temperature measurements possible even on the smallest scale / Molecular ruby for use in material sciences, biology, and medicine

Chemists at Johannes Gutenberg University Mainz (JGU) in cooperation with researchers of the German Federal Institute for Materials Research and Testing (BAM)...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Plants are networkers

19.06.2017 | Event News

Digital Survival Training for Executives

13.06.2017 | Event News

Global Learning Council Summit 2017

13.06.2017 | Event News

 
Latest News

Mice provide insight into genetics of autism spectrum disorders

28.06.2017 | Health and Medicine

New photoacoustic technique detects gases at parts-per-quadrillion level

28.06.2017 | Physics and Astronomy

Funding of Collaborative Research Center developing nanomaterials for cancer immunotherapy extended

28.06.2017 | Life Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>