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 Novel coatings combine protection with colour effects
27.03.2015 | INM - Leibniz-Institut für Neue Materialien gGmbH

nachricht Surface-modified nanoparticles endow coatings with combined properties
26.03.2015 | INM - Leibniz-Institut für Neue Materialien gGmbH

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: Experiment Provides the Best Look Yet at 'Warm Dense Matter' at Cores of Giant Planets

In an experiment at the Department of Energy's SLAC National Accelerator Laboratory, scientists precisely measured the temperature and structure of aluminum as...

Im Focus: Energy-autonomous and wireless monitoring protects marine gearboxes

The IPH presents a solution at HANNOVER MESSE 2015 to make ship traffic more reliable while decreasing the maintenance costs at the same time. In cooperation with project partners, the research institute from Hannover, Germany, has developed a sensor system which continuously monitors the condition of the marine gearbox, thus preventing breakdowns. Special feature: the monitoring system works wirelessly and energy-autonomously. The required electrical power is generated where it is needed – directly at the sensor.

As well as cars need to be certified regularly (in Germany by the TÜV – Technical Inspection Association), ships need to be inspected – if the powertrain stops...

Im Focus: 3-D satellite, GPS earthquake maps isolate impacts in real time

Method produced by UI researcher could improve reaction time to deadly, expensive quakes

When an earthquake hits, the faster first responders can get to an impacted area, the more likely infrastructure--and lives--can be saved.

Im Focus: Atlantic Ocean overturning found to slow down already today

The Atlantic overturning is one of Earth’s most important heat transport systems, pumping warm water northwards and cold water southwards. Also known as the Gulf Stream system, it is responsible for the mild climate in northwestern Europe. 

Scientists now found evidence for a slowdown of the overturning – multiple lines of observation suggest that in recent decades, the current system has been...

Im Focus: Robot inspects concrete garage floors and bridge roadways for damage

Because they are regularly subjected to heavy vehicle traffic, emissions, moisture and salt, above- and underground parking garages, as well as bridges, frequently experience large areas of corrosion. Most inspection systems to date have only been capable of inspecting smaller surface areas.

From April 13 to April 17 at the Hannover Messe (hall 2, exhibit booth C16), engineers from the Fraunhofer Institute for Nondestructive Testing IZFP will be...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

World Conference On Regenerative Medicine 2015: Registration And Abstract Submission Now Open

25.03.2015 | Event News

University presidents from all over the world meet in Hamburg

19.03.2015 | Event News

10. CeBiTec Symposium zum Big Data-Problem

17.03.2015 | Event News

 
Latest News

Novel coatings combine protection with colour effects

27.03.2015 | Trade Fair News

A first glimpse inside a macroscopic quantum state

27.03.2015 | Physics and Astronomy

Researchers master gene editing technique in mosquito that transmits deadly diseases

27.03.2015 | Life Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>